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1 code HG0161.03GB ed.C-1804PRH

HG0130.00 A 001

ErP2018Compliant EU/2016/2281

GB Maintenance and service manual of PRH two-stage warm air heater module

PRH two-stage warm air heater module

APEN GROUP SPA reserves the right to make changes deemed to be required to its products or documentation

2code HG0161.03GB ed.C-1804 PRH 3 code HG0161.03GB ed.C-1804PRH

VER. 00.00.2017

CODE SERIAL NUMBER

Dichiarazione di Conformità Statement of Compliance

APEN GROUP S.p.A. 20060 Pessano con Bornago (MI) Via Isonzo, 1 Tel +39.02.9596931 r.a. Fax +39.02.95742758 Internet: http://www.apengroup.com Il presente documento dichiara che la macchina: With this document we declare that the unit: Modello: Model:

Generatore d’aria calda: a due stadi PRH e modulante a condensazione PCH Warm Air Heater: PRH two stages and PCH modulating and condensing

è stata progettata e costruita in conformità con le disposizioni delle Direttive Comunitarie: has been designed and manufactured in compliance with the prescriptions of the following EC Directives:

Regolamento Apparecchi a Gas 2016/426/CE Gas Appliance Regulation 2016/426/CE

Direttiva compatibilità elettromagnetica 2014/30/UE Electromagnetic Compatibility Directive 2014/30/UE

Direttiva Bassa Tensione 2014/35/UE Low Voltage Directive 2014/35/UE

Regolamento ErP 2016/2281/CE ErP Regulation 2016/2281/CE

è stata progettata e costruita in conformità con le norme: has been designed and manufactured in compliance with the standards:

EN1020:2009 EN 1196:2011 (only PCH) EN60335-1 EN60335-2-102 EN60730-1 (only PCH) EN 60068-2-1 (only PCH)

EN 60068-2-2 (only PCH) EN55014-1 EN55014-2 EN61000-3-2 EN61000-3-3

Organismo Notificato:

Notified body: Kiwa Cermet Italia S.p.A 0476 PIN 0476CQ0451

La presente dichiarazione di conformità è rilasciata sotto la responsabilità esclusiva del fabbricante This declaration of conformity is issued under the sole responsibility of the manufacturer Pessano con Bornago 05/02/2018

Apen Group S.p.A. Un Amministratore




INDEXSECTION 1. GENERAL CAUTIONS ............................................................. 4

1.1. Fuel .......................................................................................................41.2. Gas Leaks .............................................................................................41.3. Power supply .........................................................................................41.4. Use ........................................................................................................51.5. Maintenance ..........................................................................................51.6. Transport and handling ..........................................................................51.7. Dismantling and demolition ...................................................................51.8. Installation .............................................................................................5

SECTION 2. TEChNICAL DATA .................................................................... 6

SECTION 3. Operating Cycle ......................................................................... 9 3.1. Air/gas premixing operation ...................................................................10

SECTION 4. USER'S INSTRUCTIONS ........................................................ 11 4.1. Operation of the heater ..........................................................................11 4.2. Interface Panel .......................................................................................11 4.3. Analysis of Lockouts - Faults..................................................................11 4.4. Connections to the Flue .........................................................................12 4.5. GAS Connection.....................................................................................134.6. Startingupforthefirsttime ................................................................................184.7. Analysis of combustion ......................................................................................18 4.8. Conversion to LPG .................................................................................194.9. Conversion to gas G25 - G25.1 - G25.3 - G27 ..................................................204.10. Conversion to gas G2.350 .................................................................................204.11. Replacing the Gas Valve ....................................................................................20

SECTION 5. MAINTENANCE ....................................................................... 21

SECTION 6. WIRING DIAGRAM .................................................................. 23

SECTION 7. ANALYSIS OF FAULTS .......................................................... 24

SECTION 8. LIST OF SPARE PARTS ......................................................... 25 8.1. Parts for the electrical panel ..................................................................25 8.2. Parts for the burner unit .........................................................................268.3. Other spare parts available .............................................................................................27




1. GENERAL CAUTIONSThis manual is an integral part of the product and must always accompany it. Should the equipment be sold or passed on to someone else, always make sure that this manual is supplied with the equipment for future reference by the new owner and/or installer.The manufacturer shall not be held civilly or criminally responsible for injuries to people or animals or damages to things caused by incorrect installation, calibration and maintenance or by failure to follow the instructions contained in this manual or by operationscarriedoutbyunqualifiedstaff.This product must be used only for the applications for which it was designed or approved. Any other use must be regarded as hazardous.During the installation, operation and maintenance of the equipment described in this manual, the user must always strictly follow the instructions given in all the chapters of this use and instruction manual.----------------------------------------------------------------------------------The condensing warm air heater must be installed in compliance with current regulations, according to the manufacturer's instructions and by qualified staff, technically specialised in the heating field.----------------------------------------------------------------------------------Conversion between different types of gas and maintenance operations must be carried out before being switched on, and only bysuitablyqualifiedstaff.Technical Service Centres certified by current and older standards prevailing in the installation country and in compliance with the issued authorisations.

SAFETY-RELATED WARNINGSThis chapter describes the safety instructions to be followed by machine operators.

1.1. FuelBefore starting up the heater, make sure that:• the gas mains supply data are compatible with the data

stated on the nameplate;• thecombustionairintakeducts(whenfitted)andtheflue

gaspipesareonlythosespecifiedbythemanufacturer;• the combustion air is supplied in such a way as to avoid

even partial obstructions of the intake grille (caused by leavesetc.);

• the fuel intake internal and external seal is checked during the testing stage, as required by applicable standards;

• the heater is supplied with the same type of fuel it has been designed for;

• the system is correctly sized for such flow rate and isfittedwithall safetyandmonitoringdevices requiredbyapplicable standards;

• the inside of the gas pipes and air distribution ducts for ducted heaters has been thoroughly cleaned;

• thefuelflowrateissuitableforthepowerrequiredbytheheater;

• the fuelsupplypressure isbetween therangespecifiedon the nameplate.

1.2. Gas LeaksIf you smell gas:• do not operate electrical switches, telephones or any other

object or device that could produce sparks;• immediatelyopendoorsandwindowstocreateanairflow

to vent the gas out of the room;• close the gas valves;• call for qualified staff.------------------------------------------------------------------------------ NOTE: supplying the gas circuit with pressure greater than 60 mbar is strictly prohibited. Such pressures could cause the valve to break.---------------------------------------------------------------------------------

1.3. Power supplyThe heater must be correctly connected to an effective earthing system,madeincompliancewithcurrentregulations(IEC64-8).

Cautions.• Checktheefficiencyoftheearthingsystemand,ifrequired,

calloutaqualifiedengineer.• Check that the mains power supply is the same as the

power input stated on the equipment nameplate and in this manual.

• Do not mistake the neutral for the live wire.• The heater can be connected to the mains power supply

with a plug-socket only if the latter does not allow live and neutral to be swapped.

• The electrical system and, more specifically, the cablesection, must be suitable for the equipment maximum power input, shown on the nameplate and in this manual.




Do not pull electric cables and keep them away from heat sources.---------------------------------------------------------------------------------NOTE: It is compulsory to install, upstream of the power cable, a fused multi-pole switch with contact opening wider than 3mm.The switch must be visible, accessible and less than 3m away from the control board.All electrical operations (installation and maintenance) must be carried out by qualified staff.---------------------------------------------------------------------------------

1.4. UseDo not allow children or inexperienced people to use any electrically powered equipment.The following instructions must be followed:• do not touch the equipment with wet or damp parts of your

body and/or with bare feet;• do not leave the equipment exposed to the elements (rain,

sunetc...)unlessitisadequatelyprotected;• do not use the gas pipes to earth electrical equipment;• donottouchthehotpartsoftheheater,suchastheflue

gas duct;• donotwettheheaterwithwaterorotherfluids;• do not place any object over the equipment;• do not touch the moving parts of the heater.

1.5. Maintenance---------------------------------------------------------------------------------Maintenance operations and combustion inspections must be carried out in compliance with current standards.---------------------------------------------------------------------------------Before carrying out any cleaning and maintenance operations, isolate the unit from the mains power supply using the switch located on the electrical system and/or on the shut-off devices.If the heater is faulty and/or incorrectly operating, switch it off and do not attempt to repair it yourself, but contact our local Technical Service Centre. All repairs must be carried out by using genuine spare parts. Failure to comply with the above instructions could compromise the safety of the equipment and invalidate the warranty.If the equipment is not used for long periods, shut the gas supply off through the gas stopcock and disconnect it from the power supply.If the heater is to be put out of service, in addition to the above operations, potential sources of hazard on the unit must be disabled.It is strictly forbidden to obstruct the Venturi pipe inlet, located on the burner-fan unit, with your hands or with any other objects. Anyobstructioncouldcauseabackfirefromthepremixedburner.

1.6. Transport and handlingThe heater is delivered fastened to a pallet and covered with a suitably secured cardboard box.Unload the heater from the truck and move it to the site of installation by using means of transport suitable for the shape of the load and for the weight.If the unit is stored at the customer’s premises, make sure a suitable place is selected, sheltered from rain and from excessive humidity, for the shortest possible time.Any lifting and transport operations must be carried out by skilled staff, adequately trained and informed on the working procedures and safety regulations.Once the equipment is moved to the correct position, the unpacking operation can be started.The unpacking operation must be carried out by using suitable tools or safety devices where required.Recovered packaging materials must be separated and disposed of according to applicable regulations in the country of use.While unpacking the unit, check that the unit and all its parts have not been damaged during transport and match the order.If damages have occurred or parts are found to be missing, immediately contact the supplier.The manufacturer is not liable for any damages occurred during transport, handling or unloading.

1.7. Dismantling and demolitionShould the machine be dismantled or demolished, the person in charge with the operation will have to:• remove the electric wiring• remove all plastic parts----------------------------------------------------------------------------NOTE: All materials recovered will be processed and disposed of according to what provided for by the laws in force in the country of use and/or according to the standards indicated in the safety sheets of the chemicals.----------------------------------------------------------------------------------

1.8. InstallationThe PRH heat exchanger must be used in the following conditions:The fuel used must have a sulphur content according to the European standard, namely: maximum peak, for short periods, 150 mg/m3, annual average lower than 30 mg/m3;•Combustionairmustnotcontainchlorine,ammoniaoralkalis;installation near swimming pools or laundries exposes the boiler to the effects of such agents.




Model PRH015 PRH024 PRH034 PRH042 PRH052 PRH072 PRH102

Type of equipment B23P - B53P - C13 - C43 - C53 - C63 - C83

CE approval PIN. 0476CQ0451

NOx class [EN1020:2009] Val 5 4

heater Performance

min max min max min max min max min max min max min max

Burnerheatoutput(Hi) kW 13.0 16.5 21.8 27.0 27.5 34.8 35.5 44.0 42.4 52.2 60 73.5 81.8 100.0

Useful Heat Output [Pmin, Prated]* kW 12.1 15.0 20.4 24.6 25.8 31.9 33.1 40.2 39.6 47.9 56.2 67.5 76.8 92.3

HiEfficiency(N.C.V.)[ƞpl, ƞnom]* % 93.2 90.7 93.7 91.2 93.7 91.8 93.2 91.3 93.2 91.3 93.7 91.8 93.9 92.3

Hsefficiency(G.C.V.)[ƞpl, ƞnom]* % 83.8 81.6 84.3 81.2 84.3 82.6 83.8 82.2 84.7 83.0 84.3 82.6 84.5 83.1

Fluelosseswithburneron(Hi) % 6.8 9.3 6.3 8.8 6.3 8.2 6.8 8.7 6.6 8.2 6.3 8.2 6.1 7.7

Fluelosseswithburneroff(Hi) % <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1

Envelope loss factor [Fenv]* (1) % 0% 0% 0% 0% 0% 0% 0%

Seasonalspaceheatingenergyefficiency[Reg.EU/2281/2016] [ƞs,h]*

% 73,6 72,9 72,3 72,5 72,2 73,4 72,4

Emissionefficiency[Reg.EU/2281/2016] [ƞsflow]* % 93,8 91,2 91,3 92,0 90,7 92,6 91,1

Flue gas emissions

Carbon monoxide - CO - (0% of O2)(2) ppm <5 <5 <5 <5 <5 <5 <5

Emissions of nitrogen oxides - NOx*(0% of O2)(Hi)(3)

44 mg/kWh - 25 ppm

30 mg/kWh - 17 ppm

30 mg/kWh - 17 ppm

44 mg/kWh - 25 ppm

44 mg/kWh - 25 ppm

43 mg/kWh - 24 ppm

58 mg/kWh - 33 ppm

Emissions of nitrogen oxides - NOx*(0% of O2)(Hs)(4)

40 mg/kWh - 22 ppm

27 mg/kWh - 15 ppm

27 mg/kWh - 15 ppm

40 mg/kWh - 22 ppm

42 mg/kWh - 24 ppm

39 mg/kWh - 23 ppm

52 mg/kWh - 30 ppm

Pressureavailableattheflue Pa 80 100 120 120 130 140 140

Flue gas temperature, CO2contentandfluegasmassflowrate:seegastablesonpage15andonthefollowingpages

Electrical Characteristics

Supply voltage V 230 Vac - 50 Hz single-phase

Rated electricity consumption [elmin - elmax ]* kW 0.037 0.063 0.033 0.058 0.045 0.074 0.037 0.071 0.056 0.101 0.061 0.112 0.080 0.121

Power input in stand-by [elsb]* kW 0.005

Protection Rating IP IP X5D

Operating Temperatures °C from -15°C to +40°C - for lower temperatures, a burner housing heating kit is required

Connections

Ø gas connection UNI/ISO 228/1-G 3/4"

UNI/ISO 228/1-G 3/4"

UNI/ISO 228/1-G 3/4"

UNI/ISO 228/1-G 3/4"

UNI/ISO 228/1-G 3/4"

UNI/ISO 228/1-G 3/4"

UNI/ISO 228/1- G 3/4 ''

Intake/exhaust pipes Ø mm 80/80 80/80 80/80 80/80 80/80 80/80 80/80

Air flow rate

Airflowrate(15°C)(5) m3/h 2000 2700 3100 4300 4500 7800 9000

Weight

Net Weight kg 39 39 48 48 58 72 98

2. TEChNICAL DATA

Thereare3configurationsofPRH,listedbelow:• A Singlemodule(ASystem);• B Horizontallycombinedmodules(BSystem);• C Verticallycombinedmodules(CSystem).

A - PRh single modules (A System)They consist of a single heat exchanger; the range includes seven models, i.e.: PRH 015, 024, 034, 042, 052, 072 and 102. The heat output ranges from 12.1 to 92.3 kW produced.The modules can be installed both horizontally and vertically, according to the air flow direction, regardless of the heaterpositioning.

NOTES:* Symbol of conformity with Reg.EU/2281/2016.(1)Thelossesfromtheenclosuremustberegardedaszeroasthemachineisinstalledinanairhandling/rooftopunit.(2)Valuereferredtocat.H(G20).(3)WeightedvaluetoEN1020:2009ref.tocat.H(G20),referredtonetcalorificvalue(Hi,N.C.V).(4) WeightedvaluetoEN1020:2009ref.tocat.H(G20),referredtogrosscalorificvalue(Hs,G.C.V).(5)Referenceairflowrateforthecalculationofyieldsandseasonenergyefficienciesandemissionslistedinthetable




Model PRH144 PRH204 PRH310 PRH410




heater Performance

min max min max min max min max

Burnerheatoutput(Hi) kW 60 147.0 81.8 200.0 81.8 300.0 81.8 400.0

Useful Heat Output [Pmin, Prated]* kW 56.2 135.0 76.8 184.6 76.8 276.9 76.8 369.2

HiEfficiency(N.C.V.)[ƞpl, ƞnom]* % 93.7 91.8 93.9 92.3 93.9 92.3 93.9 92.3

Hsefficiency(G.C.V.)[ƞpl, ƞnom]* % 84.3 82.6 84.5 83.1 84.5 83.1 84.5 83.1

Fluelosseswithburneron(Hi) % 6.3 8.2 6.1 7.7 6.1 7.7 6.1 7.7

Fluelosseswithburneroff(Hi) % <0.1 <0.1 <0.1 <0.1

Envelope loss factor [Fenv]* (1) % 0% 0% 0% 0%

Seasonalspaceheatingenergyefficiency[Reg.EU/2281/2016] [ƞs,h]*

% 77,9 77,4 78,4 79,0

Emissionefficiency[Reg.EU/2281/2016] [ƞsflow]* % 95,7 94,9 96,1 96,7

Flue gas emissions

Carbon monoxide - CO - (0% of O2)(2) ppm <5 <5 <5 <5


mg/kWh

43 mg/kWh - 24 ppm

58 mg/kWh - 33 ppm

58 mg/kWh - 33 ppm

58 mg/kWh - 33 ppm


39 mg/kWh - 23 ppm

52 mg/kWh - 30 ppm

52 mg/kWh - 30 ppm

52 mg/kWh - 30 ppm

Pressureavailableattheflue Pa 140 140 140 140

Flue gas temperature, CO2contentandfluegasmassflowrate:seegastables on page 15 and on the following pages



Rated electricity consumption [elmin - elmax ]* kW 0.122 0.224 0.160 0.242 0.240 0.363 0.320 0.484



Operating Temperatures °C from 15°C to +40°C - for lower temperatures, a burner housing heating kit is required

Connections

Ø gas connection UNI/ISO 228/1- G 1½"

UNI/ISO 228/1- G 1½"

UNI/ISO 228/1- 1xG1½"and1x

G 3/4"

UNI/ISO 228/1- 2xG1½"

Intake/exhaust pipes Ø mm 2 x 80/80 2 x 80/80 3 x 80/80 4 x 80/80

Air flow rate

Airflowrate(15°C)(5) m3/h 15600 18000 27000 36000

Weight

Net Weight kg 154 206 309 412

B - PRh horizontally combined modules (B System)They consist of two or more heat exchangers; the number of burners,gasequipmentandflues isequal to thenumberofheat exchangers.The gas and electrical connection is the same for all modules.The range includes the two-module models, PRH144 and 204, the three-module model, PRH310, and the four-module model PRH410.The heat output ranges from 56.2 to 369.2 kW produced.


The modules can be installed both horizontally and vertically, according to the air flow direction, regardless of the heaterpositioning.




Model PRH152 PRH202




heater Performance

min max min max

Burnerheatoutput(Hi) kW 60 147.0 81.8 200.0

Useful Heat Output [Pmin, Prated]* kW 56.2 135.0 76.8 184.6

HiEfficiency(N.C.V.)[ƞpl, ƞnom]* % 93.7 91.8 93.9 92.3

Hsefficiency(G.C.V.)[ƞpl, ƞnom]* % 84.3 82.6 84.5 83.1

Fluelosseswithburneron(Hi) % 6.3 8.2 6.1 7.7

Fluelosseswithburneroff(Hi) % <0.1 <0.1

Envelope loss factor [Fenv]* (1) % 0% 0%

Seasonal space heating energy efficiency[Reg.EU/2281/2016] [ƞs,h]*

% 77,9 77,4

Emissionefficiency[Reg.EU/2281/2016] [ƞsflow]* % 95,7 94,9

Flue gas -Polluting emissions

Carbon monoxide - CO - (0% of O2)(2) ppm <5 <5


mg/kWh

43 mg/kWh - 24 ppm

58 mg/kWh - 33 ppm


39 mg/kWh - 23 ppm

52 mg/kWh - 30 ppm

Pressureavailableattheflue Pa 140 140

Flue gas temperature, CO2 content and flue gas mass flow rate: seegas tables on page 15 and on the

following pages



Rated electricity consumption [elmin - elmax ]* kW 0.122 0.224 0.160 0.242



Operating Temperatures °C from -15°C to +40°C - for lower tem-peratures, a burner housing heating

kit is required

Connections

Ø gas connection UNI/ISO 228/1- G 1½"

UNI/ISO 228/1- G 1½"

Intake/exhaust pipes Ø mm 2 x 80/80 2 x 80/80

Air flow rate

Airflowrate(15°C)(5) m3/h 15600 18000

Weight

Net Weight kg 148 200

C- PRh Vertically combined modules (C System)They consist of two heat exchangers; the number of burners, gas equipmentandfluesisequaltothenumberofheatexchangers.The gas and electrical connection is the same for all modules.These modules have a reduced width and low pressure drops when air goes through.The range includes two-module models PRH152 and 202.The heat output ranges from 56.2 to 184.6 kW produced.

Themodulescanbeinstalledwithhorizontalairflowdirectiononly.Heaterswithverticalairflowcannotbeinstalled.





HG0131.00 A 001

HG105 C2 001

34-35

HG0106 C2 034

3. OPERATING CYCLEBurner operation On heat request, generated by the closing of the contact of terminals 34 and 35, the adjustment PCB (APG) starts theoperating cycle. The equipment will immediately start the burner [A] fan pre-washing the combustion chamber for a set time. After the pre-wash, the ignition phase will begin: the equipment opens the solenoid valve EV1 and in parallel the solenoid valve EVP that supplies the pilot burner [B].Afterdetectingthepilotflame,theequipmentopensthemaingas valve EV2 [C] supplying the main burner.After the operation overlapping time of the two burners (pilot and

maximum value, if requested, in a variable time set in the adjustmentPCB(APG)program.During the operation, the APG PCB will adjust the heat output of the burner according to the opening or closing of terminals 34and35(ON/OFF)and/or16and17(high/lowflame).In case of multiple modules the external adjustment modulation could turn off one or more modules in cascading operation.

Burner switch-off Once the heat request is over, the burner [E] will turn off; the fan will continue to ventilate the combustion chamber, after the wash, for a set time [F]. The opening of the ON/OFF contact (terminals34and35)alwayscauses thestopof theburnerwithout generating any fault.

main)haselapsed,theflamemonitoringPCB(APG)cutsoffthe solenoid valve EVP supply and turns the pilot burner [D] off.Flame detection is carried out by a single electrode for both the pilot burner and the main burner.The ignition program turns the burner on at an intermediate heat output, which corresponds to approx. 30% of the maximum output. Once flame is stabilised at ignition power for a fewseconds, the burner starts increasing its output reaching the

Cooling fansPRH modules do not control the cooling fans.When the heat request is over, the opening of the ON/OFF contact turns the burner off but the cooling fans will carry on working for apre-settime(60sec.),enoughtocooltheexchangerdown.Cooling fans management can be carried out separately, but it is necessary to comply with the time setting indicated in the following paragraphs.

Ventilation start with external controlAir fan must be started together with burner [G] or it must be delayed for maximum 60 seconds [H], to prevent cold air from entering the room. If a fan electrical protection control and/or afanairflowcontrolexist,thesemustbeconnectedinseriesto an ON/OFF contact.

Burner unit

Pilot burner

Detection electrode

Ignition electrode

Gas valve

EVP

EV1 and EV2




Pres

sion

e (P

orta

ta) g

as

HG

0106

EG

004

IT_e

d.05

07

HG106 EG004

HG106 C2 034_bis

Safety thermostatsA safety STB thermostat with automatic reset and positive safety setting is installed on the heater module; the breakage of the sensitive element corresponds to a safety intervention. Thetriggeringofthethermostat,throughtheflamemonitoringequipment (APG), causes the burner stop and the flameequipment lockout. Thermostat reset is carried out automatically by the APG equipment. The APG equipment lockout, caused by the safety thermostat triggering, is indicated on the interface panel by the red warning light turning on.Thelockoutisclassifiedas"non-volatile"andrequiresamanualreset.

LockoutsIn the event of a lockout, signalled on the interface panel by the red warning light turning on, the PRH heater can be manually unlocked directly from the machine by pressing the proper button on the interface panel for more than 1 second. Make sure to leave the switch on winter side, otherwise the heater appears to be switched off.The causes of the lockout signal appearance may be:-burnerlockout[noflame]- safety devices lockoutIf after two or three reset attempts the lockout situation persists, it is recommended not to insist and to contact a Service Centre for any repair operation needed.

Burner lockoutIftheflamemonitoringequipment(APG)detectsthattheburnerhas failed to start, the ignition cycle is repeated automatically up to maximum 4 times. If the lockout persists, the red warning light of the interface panel will turn on.----------------------------------------------------------------------------------WARNING: The flame monitoring equipment memorises the number of manual resets that are performed during its lifetime. In case of five resets performed in a period of 15 minutes, without a flame being ignited and detected, the equipment will go into a "timed" lockout. In this case, it is

Ventilation switch-off with external controlAt the end of the heat request the cooling ventilation must be kept for a time above three minutes [L]; this is to allow the correct cooling of the exchanger. Failure to perform the post-cooling operations on the exchanger will cause:• a shorter lifetime of the exchanger and the guarantee will

be null and void;• the safety thermostat to trigger and the relevant manual

reset.----------------------------------------------------------------------------------IMPORTANT: Powering off the unit before completing the cooling cycle and with machine set to ON is strictly prohibited. Failure to follow these instructions shall invalidate the warranty and cause early deterioration of the heat exchanger.------------------------------------------------------------------------------------

required to wait another 15 minutes before resetting it again.----------------------------------------------------------------------------------Fault lockoutTo check the type of lockout refer to Paragraph 5.3 "Analysis of Lockouts - Faults".

3.1. Air/gas premixing operationThe PRH heater is equipped with a burner with complete air with gas premixing. Air is mixed with gas inside the motor-fan impeller.The air suctioned by the impeller will run though the calibrated Venturi pipe creating a vacuum. The vacuum in the Venturi is balanced by the gas valve, which is of the pneumatic control type. The air pressure - gas pressure ratio of the valve is 1:1. This ratio is corrected by acting on offset adjustment screw (placed onthegasvalve).Theheater issuppliedwithoffsetalreadyadjusted and screw sealed.A second adjustment is provided by the screw placed on the Venturi,whichregulatesthemaximumgasflowratevalueanddetermines the carbon dioxide level (CO2)inthefluegas.Thisis also a default setting. The screw is not sealed to allow the conversion to another gas type. To adjust the offset and the CO2 see the chapter dedicated to the service.




HG0161.00 A 001

4. USER'S INSTRUCTIONSPlease read the safety warnings described in the previous pages. The operations that the user must carry out are limited to the use of the controls placed on the interface panel on the machine.

4.1. Operation of the heaterThe PRHmodule is fitted inside amachine, roof-top or airhandling unit, and its management is demanded to the control onthemachinewhereitisfitted.The user will have to follow what stated in the manual of the machine containing the PRH to switch on, adjust and switch-off the PRH.The instructions that follow are intended for the PRH operator.Heater operation is fully automatic; it is equipped with electronic equipment with self-check function that manages all burner control and monitoring operations and heat output regulation.The ignition request is carried out by adjusting the machine in whichthePRHmoduleisfitted.

4.2. Interface PanelThe PRH module housing features an interface panel consisting of two buttons provided to reset the equipment and for summer/winter switching and of two lamps provided for lockout signalling (red)andvoltagepresencecheck(green).

4.3. Analysis of Lockouts - FaultsThe PRH module is equipped with a fault diagnostic system that is activated as soon as a malfunctioning occurs. If a lockout occurs, the red alarm warning light located on the interface panel will go on steady.To reset the fault, press and hold down the reset key for more than 1 sec.If the fault remains after attempting to reset it, do not try more than 3 times and call the Service Centre to have the fault repaired. To enable the diagnostics that will identify the type of fault, hold down the reset key for more than 5 sec.; the red warning light will startflashingforanumberoftimesaccordingtothetypeoffault,with a pause of 2 sec. between cycles. The table below shows whattheflashingmeansandthereforewhatcausedthefault.----------------------------------------------------------------------------------NOTE: ShOULD ThE SAFETY ThERMOSTAT (STB) BE OPEN BEFORE STARTING ThE START-UP CYCLE (ThIS COULD BE CAUSED, FOR EXAMPLE, BY LOW TEMPERATURES), ThE FLAME MONITORING EqUIPMENT WILL BE kEPT IN "STAND-BY" WIThOUT INDICATING ANY TYPE OF LOCkOUT. ThE hEATER WILL REMAIN SWITChED OFF ALThOUGh ThERE IS A DEMAND (PREMIX FAN OPERATIONAL) WIThOUT ANY LOCkOUT INDICATION.----------------------------------------------------------------------------------

No. of FLASHES CAUSE

1 FlashNo flame signal and board safety timeexceeded:• Detection electrode incorrectly

positioned • No fuel• Fuel valves malfunctioning• Defective ignition transformer• Incorrect burner setting• Live and neutral reversed

2flashes

Safety thermostat open:• Safety thermostat activated• Defective safety thermostat

3flashes

Not set

4flashes

Not set

5flashes

Defective burner motor Hall effect sensor:• Motor RPM lower than the set value• Burner fan broken• FAN electric cables interrupted, not

connected or wrongly connected 6flashes

Parasiticflameatignition

7flashes

Not set

8flashes

General fault

Summer-winterswitch

Power supplydetection warning light

Lockout warning light

Reset button




HG0130.00 A 025b HG0130.00 A 029b

4.4. Connections to the FlueThePRHheatermoduleisfittedwithawatertightcombustioncircuit and with the burner fan located upstream of the heat exchanger. Connectiontotheflue,accordingtohowtheheaterisinstalled,can be made as "C" type, with combustion air being drawn from outside, or as "B" type with combustion air being drawn from the heater installation site.If the heater is installed outdoor, a "B" type installation is also a "C" type.Morespecifically,theheateriscertifiedforthefollowingexhausts:B23P-C13-C33-C43-C53-C63;formoreinformationonthefluetypes, please refer to current regulations.----------------------------------------------------------------------------------NOTE: A "C" type exhaust is compulsory for PRh heaters fitted inside an Air Handling or Roof Top unit installed indoor.----------------------------------------------------------------------------------Fortheflue,certifiedpipesandterminalsmustbeusedandtheuse of the following materials is recommended:- aluminium with a thickness of at least 1.5 mm;- stainless steel with a thickness of at least 0.6 mm; the steel must have a carbon content equal to or lower than 0.2 %.Thesealsmustbesuitabletowithstandthefluegastemperaturethat ranges between 140°C and 210°C.Insulatethepipeifrequiredtoprotectthefluefromaccidentalcontact. For the air intake, use:- aluminium with a thickness of at least 1.0 mm;- stainless steel with a thickness of at least 0.4 mm.

Common exhaustsWhere possible, it is always preferable to use independent exhausts; PRH module exhausts are pressurised, therefore in this way it is possible to prevent incorrect sizing from causing a system malfunction.Whencommonexhaustsarefitted,theymustbedesignedbyprovidingsomeanti-refluxvalves(codeGXXXXX)attheoutletof each flue, before the connection with the common flue,preventing a module from discharging it own combustion gases inside another module.

Flue gas dataThetabletobeusedtocalculatethefluegasexhaustsystemwith commercially available pipes can be found in paragraph 5.5 "GAS connection" within the Gas regulation data.

The maximum permitted recirculation percentage is 10%.

Selection GuideIf the terminal is not directly connected to the heater and, therefore, extra routing is required, according to the length of the ducting, the diameter of the selected terminals, extensions and bends must be checked.After establishing the routing, the pressure drops must be calculated; each component has a different pressure drop value asthefluegasflowrateisdifferent.Thenthepressuredropsoftheeachcomponentidentifiedmustbe added, checking that the result is not higher than the value available for the PRH heater module used; if a combustion air supplypipeisfitted,lossesmustbeaddedtothefluepressuredrops.If thesumofpressuredropscausedbythefittingsishigherthan the pressure available at the exhaust, ducts with greater diameter must be used, rechecking the calculation; a pressure drophigherthanthepressureavailableatthefluereducestheheater module thermal output.----------------------------------------------------------------------------------NOTE: If the module is installed indoor:- the use of coaxial connections is forbidden for PRh heaters;- the flue gas terminal must be installed in compliance with reference national regulation requirements.----------------------------------------------------------------------------------If the duct routing requires the use of bends, the length of the bends must be subtracted from the available length:• Ø 80 wide radius bend at 90° EqL = 1.6m;• Ø 80 wide radius bend at 45° EqL = 1.1m;• Ø 100 wide radius bend at 90° EqL = 2.4m;• Ø 100 wide radius bend at 45° EqL = 0.9m.




10m

HG0130.00 A 040

HG0131.00 A 002

4.5. GAS ConnectionUsethegaslineconnectionsonlywithCEcertifiedcomponents.

The PRH module is supplied complete with:• dual gas valve;• stabiliserandgasfilter.Alcomponentsarefittedinsidetheburnerhousing.To complete the installation, as required by the current regulations,thefollowingcomponentsmustbefitted:• anti-vibration joint;• gas valve.---------------------------------------------------------------------------------NOTE: AN EN126 certified gas filter with filtration level lower than or equal to 50 microns must be used, with no pressure stabiliser, with great capacity, since the filter supplied as standard, upstream of the gas valve, has a limited surface.---------------------------------------------------------------------------------

----------------------------------------------------------------------------------IMPORTANT: For proper maintenance, connect the PRh module by means of a seal and swivel gasket.----------------------------------------------------------------------------------Avoid using threaded connections directly on the gas connection.

Current legislation allows a maximum pressure inside the rooms, or thermal stations, of 40 mbar; higher pressure values must be reduced upstream of the boiler room or the site where the PRH module is installed.

KEY

1 Main burner gas solenoid valve2 Pilot burner gas solenoid valve3 Pressure stabiliser4 Safety gas solenoid valve5 Gasfilter(smallsection)6 Anti-vibration joint7 Gasfilter(largesection)8 Gas valve

---------------------------------------------------------------------------------During the installation, we recommend to tighten the nut fastening the external gas supply pipe without exceeding the tightening torques shown below:- Ø 3/4'': 150 Nm;- Ø 1'': 200 Nm.- Ø 1 1/2'': 300 Nm.---------------------------------------------------------------------------------

---------------------------------------------------------------------------------It is strictly prohibited to supply gas to the circuit with pressure higher than 60 mbar. Such pressures could cause the valve to break.If pressure is higher than 60mbar, a pressure reducer must be installed at a distance of at least 10 m and no pressure stabiliser must be fitted between the pressure reducer and the heater, but leaving the gas filter.---------------------------------------------------------------------------------

↑Max 60 mbar Pressure reducer

To be provided by the installerIncluded with the PRH module




Country Table - Gas Category

Country Category Gas Pressure Gas PressureAT, CH II2H3B/P G20 20 mbar G30/G31 50 mbarBE <70kW I2E(S)B,I3P G20/G25 20/25 mbar G31 37 mbarBE >70kW I2E(R)B,I3P G20/G25 20/25 mbar G31 37 mbarDE II2ELL3B/P G20/G25 20 mbar G30/G31 50 mbarDK, FI, GR, SE, NO, IT, CZ, EE, LT, SI, AL, MK, BG, RO, HR, TR

II2H3B/P G20 20 mbar G30/G31 30 mbar

ES, GB, IE, PT, SK II2H3P G20 20 mbar G31 37 mbarFR II2Esi3P G20/G25 20/25 mbar G31 37 mbarLU II2E3P G20/G25 20 mbar G31 37/50 mbarNL (upto31/12/2017) II2L3B/P G25 25 mbar G30/G31 50 mbarNL (from01/01/2018) II2EK3B/P G20/G25.3 20/25 mbar G30/G31 30 mbarHU II2HS3B/P G20/G25.1 25 mbar G30/G31 30 mbarCY, MT I3B/P G30/G31 30 mbarLV I2H G20 20 mbarIS I3P G31 37 mbar

PL II2ELwLs-3B/P G20/G27/G2.350 20/13 mbar G30/G31 37 mbar

RU II2H3B/P G20 20 mbar G30/G31 30 mbar

The following information is clearly printed on the equipment packaging: country of destination, gas category and equipment code.Thecodeallowsfindingoutthefactorysettings.

NOTE: In compliance with standards EN1020, EN 437 and ISO3166, GB refers to the United kingdom.

Codes with no extension:• PRH015IT if there is no extension, it means that the equipment has been tested and set to run with natural gas [G20].

Codes with extension:The fourth letter indicates the type of gas the equipment has been set up for:• PRH015FR-xxx0 0 indicates that the equipment has been tested and set up for natural gas [G20];• PRH015MT-xxx1 1 indicates that the equipment has been tested and set up for LPG [G31];• PRH015NL-xxx2 2 indicates that the equipment has been tested and set up for 'L' natural gas [G25], or ‘K’ [G25.3];• PRH015HU-xxx3 3 indicates that the equipment has been tested and set up for natural gas [G25.1];• PRH015PL-xxx4 4 indicates that the equipment has been tested and set up for gas [G2.350].

Anotheradhesivelabel,locatednearthefuelconnectionoftheequipment,specificallyindicatesthetypeofgasandthesupplypressure for which the equipment has been set up and tested.

PRh Gas Settings Table

Suitable for the G+ Gas [Only for Holland]“TheappliancewasconfiguredfortheappliancecategoryK(I2K)andissuitablefortheuseofGandG+distributiongasesaccordingtothespecificationsasincludedintheNTA8837:2012AnnexDwithaWobbeindexof43.46–45.3MJ/m3(dry,0°C,uppervalue)or41.23–42.98(dry,15°C,lowervalue).Thisappliancecanmoreoverbeconvertedand/orbecalibratedfortheappliancecategoryE(I2E).Thisthereforeimpliesthat the appliance “is suitable for G+ gas and H gas or is demonstrably suitable for G+ gas and can demonstrably be made suitable for H gas” within the meaning of the “Dutch Decree of 10 May 2016 regarding amendment of the Dutch Gas AppliancesDecreeandtheDutchCommodities(AdministrativeFines)Actinconnectionwiththechangingcompositionofgas in the Netherlands as well as technical amendment of some other decrees”.




TYPE OF GAS G20 - Cat. E-HTYPE OF MACHINE PRH015 PRH024 PRH034 PRH042 PRH052 PRH072 PRH102

min max min max min max min max min max min max min maxCATEGORY according to the country of destination - see reference tableSUPPLY PRESSURE [mbar] 20 [min 15-max 25] *PILOT NOZZLE Ø [mm] 0.7GAS CONSUMPTION (15°C-1013mbar) [m3/h] 1.38 1.75 2.31 2.86 2.91 3.68 3.76 4.66 4.49 5.52 6.35 7.78 8.66 10.58

CARBON DIOXIDE -CO2 CONTENT [%] 8.7 8.8 8.7 8.8 8.7 8.8 8.7 8.8 8.7 8.8 8.7 8.8 8.7 8.8

FLUE GAS TEMPERATURE [°C] 155 204 145 191 143 182 155 194 152 187 146 184 142 188FLUE GAS MASS FLOW RATE(MAX.) [kg/h] 27.7 45.3 58.4 73.9 87.7 123.4 168.0

GAS ORIFICE PLATE [mm] 3.9 5.7 6.4 7.7 9.4 9.6 11.2

AIR ORIFICE PLATE [mm] 15.5 Not required

Not required

Not required

Not required

Not required

Not required

* For Hungary, supply pressure is 25 mbar

TYPE OF GAS G25 - Cat. L-LLTYPE OF MACHINE PRH015 PRH024 PRH034 PRH042 PRH052 PRH072 PRH102



FLUE GAS TEMPERATURE [°C] 155 204 145 191 143 182 155 194 152 187 146 184 142 188

GAS ORIFICE PLATE [mm] 4.7 6.8 7.7 9.0 8,3 Not required

Not required


Not required

Not required

Not required

Not required

Not required

* For Germany, supply pressure is 20 mbar

TYPEOFGASG25.3-Cat.K(OnlyNetherlands-from01/01/2018)TYPE OF MACHINE PRH015 PRH024 PRH034 PRH042 PRH052 PRH072 PRH102


CARBON DIOXIDE -CO2 CONTENT [%] 8.7 8.9 8.7 8.9 8.8 8.9 8.8 8.9 8.8 8.9 8.8 8.9 8.7 9

FLUE GAS TEMPERATURE [°C] 155 204 145 191 140 170 155 194 158 165 146 184 142 188

GAS ORIFICE PLATE [mm] 4.7 6.8 7.7 9.0 8,3 Not required

Not required


Not required

Not required

Not required

Not required

Not required




TYPEOFGASG2.350-Cat.Ls(OnlyforPL-Poland)TYPE OF MACHINE PRH015 PRH024 PRH034 PRH042 PRH052 PRH072*

min max min max min max min max min max min maxCATEGORY according to the country of destination - see reference tableSUPPLY PRESSURE [mbar] 13 [min 10-max 16] PILOT NOZZLE Ø [mm] 0.75GAS CONSUMPTION (15°C-1013mbar) [m3/h] 1.93 2.44 3.23 4.00 4.07 5.16 5.26 6.52 6.28 7.73 8.89 10.89

CARBON DIOXIDE -CO2 CONTENT [%] 8.5 8.8 8.7 8.8 8.8 8.9 8.7 8.8 8.7 8.8 8.6 8.7

FLUE GAS TEMPERATURE [°C] 155 204 145 191 143 182 155 194 152 187 120 152

GAS ORIFICE PLATE [mm] 5.8 11.0 Not required

Not required

Not required

Not required


Not required

Not required

Not required 29.0

* Maximum nominal power output 63.0 kW / minimum 51.0 kW

NOTE: The minimum and maximum heat outputs of ThE PRh072 are lower with respect to the operation with G20. The model PRh102 is not suitable for operation with gas G2.350.The conversion kit for G2.350 is only supplied on request.

TYPEOFGASG25.1-Cat.S(OnlyforHU-Hungary)TYPE OF MACHINE PRH015 PRH024 PRH034 PRH042* PRH052 PRH072

min max min max min max min max min max min maxCATEGORY according to the country of destination - see reference tableSUPPLY PRESSURE [mbar] 25 [min 20-max 33]PILOT NOZZLE Ø [mm] 0.70GAS CONSUMPTION (15°C-1013mbar) [m3/h] 1.60 2.03 2.68 3.32 3.38 4.28 4.36 5.41 5.21 6.41 7.37 9.03

CARBON DIOXIDE -CO2 CONTENT [%] 8.9 9.0 9.1 9.2 8.8 8.9 8.9 9.5 9.5 9.6 9.5 9.6


GAS ORIFICE PLATE [mm] 4.7 6.8 7.7 9.0 Not required

Not required


Not required

Not required

Not required

Not required

* Maximum nominal heat output 42.0 kW

TYPEOFGASG27-Cat.Lw[formerGZ41.5](OnlyforPL-Poland)TYPE OF MACHINE PRH015 PRH024 PRH034 PRH042 PRH052 PRH072

min max min max min max min max min max min maxCATEGORY according to the country of destination - see reference tableSUPPLY PRESSURE [mbar] 20 [min 16-max 23]PILOT NOZZLE Ø [mm] 0.70GAS CONSUMPTION (15°C-1013mbar) [m3/h] 1.55 1.96 2.60 3.21 3.27 4.14 4.23 5.24 5.05 6.21 7.14 8.75

CARBON DIOXIDE -CO2 CONTENT [%] 8.9 9 8.8 8.9 8.8 8.9 8.8 8.9 8.8 8.9 8.7 8.8


GAS ORIFICE PLATE [mm] 4.9 7.2 8.5 9.8 Not required

Not required


Not required

Not required

Not required

Not required




TYPE OF GAS G30 - Cat. 3B-PTYPE OF MACHINE PRH015 PRH024 PRH034 PRH042 PRH052 PRH072 PRH102

min max min max min max min max min max min max min* max**CATEGORY according to the country of destination - see reference tableSUPPLY PRESSURE [mbar] 30 [min 25-max 35] - 50 [min 42.5-max 57.5] PILOT NOZZLE Ø [mm] 0.51GAS CONSUMPTION (15°C-1013mbar) [kg/h] 1.08 1.37 1.81 2.24 2.28 2.89 2.76 3.65 3.30 4.33 4.98 6.10 6.97 8.63


FLUE GAS TEMPERATURE [°C] 155 204 145 191 143 182 155 194 152 187 146 184 142 188GAS ORIFICE PLATE [mm] 2.8 4.0 4.5 5.6 6.1 6.9 7.8


Not required

Not required

Not required

Not required

Not required-

* Minimum rated heat output 84.0 kW * Maximum rated heat output 104.0 kW

TYPE OF GAS G31 - Cat. 3PTYPE OF MACHINE PRH015 PRH024 PRH034 PRH042 PRH052 PRH072 PRH102

min max min max min max min max min max min max min maxCATEGORY according to the country of destination - see reference tableSUPPLY PRESSURE [mbar] 30 [min 25-max 35] - 37 [min 25-max 45] - 50 [min 42.5-max 57.5] PILOT NOZZLE Ø [mm] 0.51GAS CONSUMPTION (15°C-1013mbar) [kg/h] 1.06 1.35 1.78 2.21 2.25 2.85 2.90 3.60 3.47 4.27 4.91 6.01 6.69 8.18


FLUE GAS TEMPERATURE [°C] 154 206 150 195 145 185 155 194 149 187 145 186 150 188FLUE GAS MASS FLOW RATE(MAX.) [kg/h] 21.2 34.7 45.0 56.9 67.1 94.4 128.5

GAS ORIFICE PLATE [mm] 2.8 4.0 4.5 5.6 6.1 6.9 7.8


Not required

Not required

Not required

Not required

Not required

NOTE: For PRH144 and PRH152 gas consumption and mass flow rate values are twice the PRH072 values.For PRH202 and PRH204 gas consumption and mass flow rate values are twice the PRH102 values.For PRH310 gas consumption and mass flow rates are three times higher than the PRH102.For PRH410 gas consumption and mass flow rates are four times higher than the PRH102.




HG0131.00 A 003

4.6. Starting up for the first timeThe PRH heater module is supplied already set up and tested forthegasspecifiedonthenameplate.BeforeturningonthePRH module check the following:• make sure the gas being supplied matches the gas for which

the PRH has been set up;• check, with the pressure intake "IN" on the gas valve, that

the valve input pressure corresponds to that required for the type of gas being used;

• check that electrical connections correspond to those indicated in this manual or other wiring diagrams enclosed with the unit;

• check that efficient earthing connections have been completed, carried out as specified by current safetyregulations;

• power on the heater with the general switch located on the unit and insert the power plug inside the PRH compartment (greenwarninglighton);

• close the room thermostat contact and check that the switch located on the unit is set to "WINTER".

After checking the above mentioned conditions, and if the heater has not been locked out, a combustion chamber pre-cleaning stageisstarted,followedbytheburnerignitionand,finally,bystarting up the cooling fans.------------------------------------------------------------------------------ NOTE: Frequently, when turned on for the first time, the pilot burner cannot ignite because there is air in the gas pipe. This will lock out the equipment. You will need to reset the equipment and repeat the operation until it ignites.----------------------------------------------------------------------------------

4.7. Analysis of combustionWait until the heater is switched on. Check that the heater is at maximum output and check that the input pressure in the valve corresponds to the value required; adjust if necessary.Perform the combustion analysis to verify that the level of CO2 correspondstothefiguresinthetablesinParagraph4.4"GASConnection".If the measured value is different, turn the adjustment screw on the Venturi pipe. Loosening the screw will increase the CO2 level, screwing it down will decrease the level.Set the heater to minimum output by opening contact 16-17 on the equipment, verify that the level of CO2 corresponds to thefiguresinthetablesinParagraph4.4"GASConnection".If the values do not match, screw or loosen the offset screw respectively to increase or decrease the CO2 level and repeat the procedure.----------------------------------------------------------------------------------NOTE: The heater directly supplied to function with LPG is set up for G31 gas. If the unit runs on G30 instead, it is necessary to verify and possibly adjust settings for CO2 as shown in the tables in Paragraph 4.4 "GAS connection".----------------------------------------------------------------------------------

Venturi

Gas intake pressure connector(IN)

OFFSET adjustment screw

OFFSET pressure intake (Pascal)

CO2 adjustment




HG0131.00 A 004

4.8. Conversion to LPGConversion is strictly prohibited in some countries, such as Belgium, which do not allow the double gas category. The unit is supplied already set for natural gas and with the kit for conversion to LPG, including:• calibratedgasorificeplate;• pilot nozzle;• adhesive plate "Equipment converted...".The kit is not supplied in countries where conversion is prohibited.To convert the unit, follow these instructions:• disconnect from power supply;• between the gas pipe and the Venturi, replace the gas

orificeplatefitted(naturalgas)withtheonesuppliedwiththekit(forLPG);

• replacethepilotnozzle(naturalgas)withtheoneinthekit(LPG);

• restore power supply and set the heater up for ignition;• while the start-up electrode is sparking, make sure there

are no gas leaks.

When the burner is lit and working at maximum capacity, verify that:• the valve intake pressure corresponds to the value required

for the type of gas that you are using;• the combustion analysis procedure is performed as

described in Paragraph 4.6 "Combustion Analysis";• the level of CO2 is within the limits indicated for the type of

gasbeingused(tablesinParagraph4.4"GASconnection").If a different value is detected, change it by turning the adjustment screw: screwing it down decreases the CO2 level, loosening it increases the level.

• that the gas valve Venturi pipe connector does not leak.After converting and regulating the unit, replace the nameplate indicating "Equipment regulated for natural gas" with the one in the kit that indicates "Equipment converted ...".

CalibratedGASorificeplate

Gaskets




4.10. Conversion to gas G2.350Conversion is allowed only for Poland.Conversion from one type of gas to another can only be performed by authorised service centres.Conversion to G2.350 consists in:• for all models: pilot nozzle replacement.After the conversion, relight the burner and:• check that the intake pressure to the gas valve corresponds

to the level required for the type of gas [see tables in Paragraph 4.4 "GAS Connection"];

• check that the level of CO2, at maximum and minimum heat output, is between the values indicated for the type of gas. If the value is different, change it by turning the adjustment screw on the Venturi pipe: screwing it down decreases the value, loosening it increases the value.

Stick the nameplate "Equipment converted for gas G2.350...." in place of the one that says "Equipment set up for ......".----------------------------------------------------------------------------------NOTE: The minimum and maximum heat outputs of ThE PRh072 are lower with respect to the operation with G20. The model PRh102 is not suitable for operation with gas G2.350.-------------------------------------------------------------------------------------------------------------------------------------------------------------------NOTE: The conversion kit is supplied on request---------------------------------------------------------------------------------

4.11. Replacing the Gas ValveIf the gas valve must be replaced, it is required to proceed with an inspection and possibly calibrate the CO2 level through the adjustments on the Venturi pipe.It is advisable not to calibrate the offset: the valve calibration is performed by the manufacturer.If necessary, carry out the combustion analysis procedure as described in Paragraph 4.6 "Analysis of combustion".

4.9. Conversion to gas G25 - G25.1 - G25.3 - G27Conversion for gasses from G20 to G25 or G25.1 or G25.3 or G27 is allowed only in countries of category II2ELL3B/P [Germany], II2Esi3P [France], II2E3P [Luxembourg] and category II2HS3B/P [Hungary] and category II2ELwLs3B/P [Poland]. For countries in category II2L3B/P [Netherlands up to 31/12/2017] and II2EK3B/P [Netherlands from 01/01/2018] the unit is supplied already set up and regulated for G25 or G25.3.For category I2E countries, where conversion from G20 to G25 is not permitted [Belgium], the unit is supplied set for operation with G20 gas.Conversion from one type of gas to another can only be performed by authorised service centres.Conversion to G25 and/or G25.1, G25.3, G27 where possible, consists in:• insertionoforificeplate(accordingtothegastypeandthe

equipmentmodel)After the conversion, relight the burner and:• check that the intake pressure to the gas valve corresponds

to the level required for the type of gas [see tables in Paragraph 7.2 "GAS Connection Tables"];

• check that the level of CO2, at maximum and minimum heat output, is between the values indicated for the type of gas. If the value is different, change it by turning the adjustment screw on the Venturi pipe: screwing it down decreases the value, loosening it increases the value.

Stick the nameplate "Equipment converted for gas G25...." in place of the one that says "Equipment set up for ......".-----------------------------------------------------------------------------------NOTE: Always pay close attention to the level of CO2 in G25.1; for G25.1 maximum heat output in the PRh042 model will be lower than when used with G20. The model PRh102 is not suitable for operation with gas G27.-------------------------------------------------------------------------------------------------------------------------------------------------------------------NOTE: The conversion kit to G25 , G25.1 and G27 is only supplied on request. The conversion kit to G25 is included in the standard supply for France, Germany and Luxembourg.---------------------------------------------------------------------------------




HG

0131

A 0

14

5. MAINTENANCETokeeptheheaterefficientandguaranteealonglifetimeofthesame, it is advisable to run some inspections at regular intervals:1)check thestatusofstart-upanddetectionelectrodesandpilotflame;2)check thestatusofflueexhaustandair intakeductsandterminals;3)checkthestatusoftheVenturipipe;4)checkandifnecessarycleantheexchangerandburner;5)checktheintakepressureatthegasvalve;6)checktheoperationofflamemonitoringequipment;7)checkthesafetythermostat(s);8)checktheionizationcurrent.----------------------------------------------------------------------------------NOTE: Operations at points 1, 2, 3, and 4 must be performed after disconnecting the heater from the electrical mains and closed the gas supply. Operations at point 5, 6, 7 and 8 must be done with the heater on.-----------------------------------------------------------------------------------

Maintenance interval chart

Maintenanceevery year

Extraordinary

1) Electrodes and Pilot2) Flue gas/Air Terminals3) Venturi pipes4) Exchanger/Burner5) Gas valve6) Flame Equipment7) Safety thermostat(s)8) Ionization current

1) Inspection of electrodesDismantlethecompletepilotflameanduseajetofcompressedairto clean the mesh and nozzle. Check the integrity of the ceramic and use sandpaper to remove any oxidation on the metal parts of the electrodes. Check the correct position of the electrodes (seedrawingbelow).It is important that the detection electrode is tangent to the head of the pilot and not inside it. The start-up electrode must discharge onto the mesh of the pilot burner.Every time you clean and check the starting/detection and the pilotflameelectrodesitisnecessarytoreplaceallthegasketsbetweentheburnerandthepilotflame.

2) Inspection of flue gas exhaust and air intake ductsVisuallyinspectwherepossibleorusespecifictoolstocheckthe status of the ducts.Remove dust that forms on the air intake terminal.

3) Inspection and cleaning of the Venturi pipeRemove any dirt at the mouth of the Venturi pipe with a brush, and be careful to not let it fall inside the piece.

4) Inspection and cleaning of the exchanger and burnerGood combustion in PRH heaters prevents dirt, which is normally caused by bad combustion. It is advisable, therefore, to not clean the exchanger and burner unless there are exceptional circumstances.An accumulation of dirt inside the exchanger could be revealed by a considerable variation in the gas capacity that is not caused by improper functioning of the gas valve.Should it become necessary to clean the burner and/or exchanger, all the gaskets between the burner and the exchanger must be replaced.

Verify that the start-up electrode discharges on the external edge of the pilot burner.

keep the detect ion electrode tangent to the pilot burner.




5) Inspection of intake gas pressureCheck that the intake pressure at the valve corresponds to the value required for the type of gas that you are using.Thisverificationmustbedonewiththeheateronatthemaximumheat capacity.

6) Inspection of flame monitoring equipment.With the heater running, close the gas tap and verify that the machine is locked out, signalled by the turning on of the red warning light on the interface panel. Reopen the gas tap, reset the lockout and wait for the heater to restart.

7) Inspection of the safety thermostat(s).This procedure must be done with the heater on and the burner lit.Open the thermostat series with an insulated tool [230 V], remove the fast-on from the safety thermostat, wait for the lockout signal to appear. Close again the thermostat series, then reset the lockout.

8) Inspection of the ionization current Operation to be carried out with a tester able to measure micro Amperes in direct current; proceed as follows:• Disconnect the heater from the power supply.• Disconnecttheflamemonitoringequipmentdetectioncable

and connect it to the tester - pole.• Connectacablebetweenthetester+poleandtheflame

monitoring equipment.• Power on the heater and wait until the burner is ignited.• Check the ionization value.The ionization current value must be higher than 2 micro Ampere. Lower values indicate that the detection electrode is incorrectly positioned, has oxidised or is about to fail.




TITOLO:

DATA:

PROGETTO: FOGLIO

19/07/2014

JG0270.00IT

JG0270.00IT_B

01CLIENTE: APEN

www.apengroup.comDATA FIRMAREV. MODIFICA

DI 01

DIS.: Cduranti

COMMESSA: SCHEMA ELETTRICO PRH015-102

0 1 2 3 4 5 6 7 8 9

A

B

C

D

E

F

G

H

I

J

BW

BL

RD

GY

ACC

IONO

GR

GR

P1

230 VAC

Apparecchiatura controllo fiamma G28800

Ventilatore Bruciatore

BW

BL

PRH015-072

PRH102

BL

BW

BL

BK

BW

BK

GR

OR

BL

RD

WT

GY

BW

BL

BW

OR

BK

BL

Reset e segnalazione allarme remote

TRASFORMATOREACC

24V

230V

VAG

FN

PEF

PEN

230V

mod. 148

mod. 118-128

54

32

1

24VHALL

PWM0V

1 0 2

EVP

EV1

EV2

C1-N

C1-L

C1-PE

N

PE4

F

1314

2324-E/0/I

9 10 11 12 14 15 16 1787

IONO

65

43

21

4241

39 38 37 36 35 34 33 32 31 30 29 28 27 25 2426 23 22 21 20 19 18

-T. W

.1

T.A

ON/O

FF

1314

X1X2

1314-RS1

X1X2

-LR1

X1X2

-LV1

-STB

1

-Y1

Single PRh wiring diagram:PRh015 - PRh102code JG0270.00_B

Burner fan

Reset and remote alarm signalling

Connections• Line: to terminals L, N, PE.• ON/OFF: to terminals 34-35. Power supply 230V 1~ 50Hz.• High/lowflame(Hi-Low):toterminals16-17.Powersupply

24V 1~ 50Hz. (In the absence of Hi/Low, make a jumper betweenterminals16and17).

• Reset and alarm signalling: to terminals 31-32-33. Power supply 230V 1~ 50Hz.

6. WIRING DIAGRAM

KEYP1 connection plug/socketSTB1 safety thermostatEV1 firstGASsolenoidvalveEV2 main GAS solenoid valveEVP pilot GAS valveIONO flamedetectionelectrodeACC start-up electrodeVAG burner fanTW1 on/off operation thermostat




OPERATION PRH

Is the burner on?

Is the room to the correct temperature?

Is the PCB powered (green LED

on)?

Is the burner at MAX power?

IS the system in lockout condition (red

LEDon)?

Is the burner at MIN power?

Is the burner still at MIN power?

CHECK:a. power plug connectionb. fuses F1, F2, F3c. 24 V transformer output

If all checks have a positive outcome, then it may be possible that:- LED is burned- PCB is faulty

Check the type of lockout and perform

the relevant corrective actions

CHECK:a.flamemonitoringequipmentvoltage presenceb. switch on the machine set to winterc. contact 34-35 closedd. operation thermostat TW1 closed

If all checks have a positive outcome, then it may be pos-sible that:- PCB is faulty

Heat output

notsufficient

If all checks have a positive outcome, then it may be possible that:- Contact 16-17 open

Bring NTC1 probe to a lower height

- Probe not calibrated- PCB is faulty

OPERATION ADJUST

YES NO

YES NO

NOYES

YESNO

YES NO

YES NO

7. ANALYSIS OF FAULTS




HG0160.00 A 009

HG0161.00 002

8. LIST OF SPARE PARTS

8.1. Parts for the electrical panel

Ignition transformerG28810

APGflamemonitoringequipmentG28800.01

Control panel unitG28304.03 PRH015-072G28305.03 PRH102

PCB case G16881 BaseG16882 Cover




HG

0131

.00

A 00

9_A

HG0131.00 A 010

HG0131.00 A 008

Air/gas fanG22903 PRH015-024- 034-042G22904 PRH052-072

C09036 PRH102

Gas valve VenturiG14898 PRH015G14899 PRH024G14990 PRH034G14068 PRH042G16219 PRH052G14154 PRH072G14154.08 PRH102

Gas valveG14456 For all models

Burner torchG14534-P PRH015-024-034G14375.01-P PRH042G16340.01-P PRH052G14370.01-P PRH072G27618-PF PRH102

Gas valve gasketC02000 For all models

Butterflygasket2x X01133 For all models

Pilot solenoid valveG14378 For all models

PilotflameunitG28030.01 G20.G28030.01-1 LPG.

8.2. Parts for the burner unit

Detection electrodeG16334.02

Start-up electrodeG16333.02

BurnerflangegasketG16332

Burner torch gasketG14086 PRH015-072G14450 PRH102

Burner ventilator gasketG14086

Pilot gasketG16331

Detection cableG27511

Start-up cableG14062.01




HG0131.00 A 012

HG0160.00 A 007

SupplySilicon round sealG27194

Exhaust castingG27816

Flue gas drainage castingG27815

Door closureX04511

Housing black sealX04510

Control panel unitG28304.03 PRH015-072G28305.03 PRH102

STB and STW thermostatG16300 STBG02781.01 STW

8.3. Other spare parts available



28code HG0161.03GB ed.C-1804 PRH TM code HG0161.03GB ed.C-1804PRH

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