vertical, steel, enamel lined sanical calorifiers storage ... · maintenance of the calorifier,...

August 2008Engineering Data Sheet 808/1

Sanical calorifiersVertical calorifiers

Vertical, steel,enamel lined

storage vesselsfor potable hot

water

150 to 1000litres

Storage capacity

Contents Page

General information 2Schematic pipework 3Dimensions 4Technical Data 5Control panel 6

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DescriptionClyde Sanical calorifiers are manufactured from heavy gauge steel with a smooth,durable and hygienic double enamelcoating to DIN 4753. Further protection against electrolytic corrosion is provided by a magnesium sacrificial anode.They are suitable for a maximum working pressure of 10 bar on the secondary side and 6 bar on the primary side. TheSanical range have a large water capacity primary coil to maximise heat transfer. Models 150 to 600 have 50mm hardpolyurethane (PU) insulation and models 800 and 1000 have 100mm soft PU insulation.

General information

System DesignPublications relating to the storage of potable hot waterand the control of legionella bacteria in water systems areavailable from the Health and Safety Executive (egApproved Code of Practice and Guidance L8 from HSEBooks) and the Chartered Institution of Building ServicesEngineers (eg TM13:2000 from CIBSE). Thesepublications give guidance on system design includingminimum stored water temperatures and the prevention oftemperature stratification in calorifiers and storage tanks.

ApplicationThe Clyde range of calorifiers have indirect primaryheating coils and are designed for use as hot waterstorage vessels in open vented or direct feed potablewater supplies with a conductivity greater than than100 S/cm (micro-siemens / cm). If used with watersupplies having a conductivity less than 100 S/cm, theprotection afforded by the internal anode is progressivelyinhibited and the guarantee provided by Clyde is reduced -refer ‘Guarantee’ below. They are not suitable for use insaline, de-ionised or chemically treated water systems.Calorifiers must be installed so as to comply with therequirements of the Water Byelaws Regulations and mustbe installed by a competent person. For use as anunvented water heater in a domestic situation, theinstallation must conform with G3 building regulations.

LocationThe location of Clyde calorifiers must provide adequatespace for pipework connections and jacket fitting whereapplicable. The location chosen must permit servicing andmaintenance of the calorifier, anode and auxiliaryequipment - refer to page 4 for recommended clearances.A specially built plinth is not necessary but calorifiersshould be installed on a level surface that is capable ofsupporting the weight of the filled calorifier and auxiliaryequipment.

Storage & handlingTo avoid damage to the magnesium anode and enamelledlining, vessels must always be handled and storedvertically in a dry, frost-free environment.

Sanical calorifier controllerThe calorifier control panel includes a thermostat,temperature gauge and on/off switch. Full details aregiven on page 6.

Primary Water CirculationTo achieve the rating and flow rates it is important that theprimary pump is sized in accordance with the data given -refer Technical data, page 5.

Secondary Water CirculationA secondary water return connection is provided to allowrecirculation back to the calorifier and ensure that hot wateris constantly available at the service outlets - see theschematic pipework arrangement on page 3.

Maintenance and protective anodeFilled and unheated calorifier vessels must never beallowed to freeze. After installation the secondary waterstorage must be filled before heated water is permitted toflow through the primary coil.The internal surfaces of the vessel must be inspectedperiodically and kept free of hard water calcium deposits.Magnesium anodes should be inspected every two yearsand replaced if more than 50% has been consumed.

GuaranteeSanical calorifiers are designed for use with potable watersupplies only. The guarantee is invalid if the calorifier isused on other types of water supply, eg, saline, de-ionised,etc.Subject to correct handling, installation, use andmaintenance, and providing that the conductivity of thewater supply is greater than 100 S/cm, Sanical calorifiervessels are guaranteed for 2 years from the date ofdelivery. If the conductivity of the water supply is less than100 S/cm, Sanical calorifier vessels are guaranteed for 1year. Control equipment and sacrificial anodes areguaranteed for 1 year.The guarantee will become invalid if :

The vessel becomes blocked with carbonatedeposits.

A magnesium anode shows signs of excessivewear.

Electric immersion heatersOptional electric immersion heaters are available - refer toClyde for details

EDS808/1 page2


Schematic pipework arrangement

The pipework schematic of Fig 1 illustrates an unvented hot water storage system that generally complies with the WaterSupply (Water Fittings) Regulations 1999 and Part G of The Building Regulations. The Sanical calorifier controller has anin-built control thermostat. Maximum working pressures are 6 bar primary and 10 bar secondary. Alternatively, an open-vented system may be used.Although fig 1 shows the secondary circulation (bronze) pump on the return to the calorifier, it is not unknown for thispump to be fitted in a small loop on the secondary water flow, where it can directly assist the flow without restricting thebore of the pipework.

Key to fig 1

SV Stop cock with drain tapPRV Pressure reducing valve (if required)SCV Single check valveExVl Expansion vesselEV Expansion valve with discharge to tundishNRV Non-return valveSgV Service valveTRV Temperature relief valve or Temperature and Pressure relief valve with discharge to tundish

Cf Cold feedPi Heating primary inletPo Heating primary outletSo Secondary outletSr Secondary return

Primary inlet

Secondary water return

Secondary water flow

Primary outlet

To drain

Tundish

Po

Sr

Pi

So

Cf

CalorifierSV

PRVSCV

ExVl

EV

NRVSgV

TRV

Fig 1 Pipework schematic for an unvented hot water storage system

EDS808/1 page3


Dimensions

Connections

So Secondary outletSr Secondary returnCf Cold feedPi Primary inletPo Primary outlet

An1 Anode position models 800 +1000 (Rp1½)

An2 Anode position models 150 to 600 (Rp1¼)Hc Handhole coverEi Electric immersion heater (optional)Sn1 Sensor pocket for thermometer (Rp½)

Sn2 Sensor pocket for thermostat (Rp½)

Recommended minimum clearances

For pipe connections At rear 500mm

For access (reversible)One side 500mm

Other side 100mm

For access & cleaning At front 600mm

EDS808/1 page4

H

Hsr

Hpi

Hpo

Hcf

Hso

C

Hc

Ei

Sn1

Sn2

Sn2

An1 An2

An1

An2

Alternative So

Fig 2a Section of Sanical models 150 to 800

Fig 2b Plan of Sanical models 800 + 1000

Fig 2c Plan of Sanical models 150 to 600


Technical data

EDS808/1 page5

Calorifier model 150 200 300 400 500 600 800 1000Vessel capacity litres 168 212 291 423 500 589 765 888Coil capacity litres 6.3 9.5 11.4 12 14 15.7 16.6 19.2Dry w eight kg 70 90 115 140 155 190 215 245Max primary w orking pressure barMax secondary w orking pressure barMax. allow able temperature oC

Overall height H mm 990 1215 1615 1460 1690 1960 1780 2030Clearance above jacket C mmVessel diameter mm 500 500 500 650 650 650 790 790Overall jacket diameter mm 600 600 600 750 750 750 990 990Handhole diameter Hc mmPrimary inlet height Hpi mm 620 750 890 795 880 985 1035 1235Primary outlet height Hpo mm 300 290 290 345 345 345 345 350Cold feed height Hcf mm 220 220 220 265 265 265 210 210Secondary outlet height Hso mm 765 975 1390 1185 1415 1685 1435 1700Secondary return height Hsr mm 495 635 1165 960 1170 1340 1145 1395Secondary outlet So Rp1 Rp1 Rp1 Rp1 Rp1 Rp1 Rp1¼ Rp1¼Secondary return Sr Rp½ Rp½ Rp½ Rp½ Rp½ Rp½ Rp1 Rp1Primary inlet Pi Rp1 Rp1 Rp1 Rp1 Rp1 Rp1 Rp1¼ Rp1¼Primary outlet Po Rp1 Rp1 Rp1 Rp1 Rp1 Rp1 Rp1¼ Rp1¼Cold feed Cf Rp1 Rp1 Rp1 Rp1 Rp1 Rp1 Rp1¼ Rp1¼

Measured standby losses kWh/24h 0.94 1.19 1.5 1.8 2.15 2.53 1.32 1.45

Sanical duties at LTHW with secondary water at 60°C, primary water inlet at 80°C and cold feed at 10°CCoil heating surface m2 1.0 1.5 1.8 1.9 2.2 2.5 2.7 3.5Continuous rating kW 24 36 44 46 55 63 68 88Primary w ater flow rate litres/s 0.28 0.44 0.53 0.56 0.67 0.75 0.81 1.06Primary coil resistance mbar 12 40 70 80 131 192 240 518Secondary w ater flow rate litre/h 412 618 755 789 944 1081 1167 1510Recovery time mins 35 29 33 46 45 47 56 57

180/120

6

9510


Calorifier control panel

Sanical control panelThe Sanical calorifier control panel ( see figs 3 and 4) incorporates a control thermostat, adjustable from 20 to 80oC. Thethermostat controls the operation of a DHW loading pump or motorised valve.

Electric immersion heatersAn optional immersion heater is available, using an Rp 1½ connection. Please contact Clyde for details.

Key to figs 3 and 4

S1 On/off switchTR ThermostatTG Temperature Gauge

Fig 3 Calorifier control panel

Fig 4 Wiring diagram for control panel

EDS808/1 page6

LNE

S1

1 2 3 4

Load

ing

pum

p

5

TR

6

Val

ve m

otor

ope

n

Val

ve m

otor

clo

sed

TGTRS1

0

60


Unit 10 Lion Park AvenueChessingtonSurrey KT9 1STt : 020 8391 2020f : 020 8397 4598e : [email protected] : www.clyde-nrg.com

EDS 808/1August 2008

Clyde Energy Solutions Ltd

This publication is issued subject to alteration or withdrawal without notice. The illustrations and specifications are not binding indetail. All offers and sales are subject to the Company's current terms and conditions of sale, a copy of which is available on request.


vertical, steel, enamel lined sanical calorifiers storage ... · maintenance of the calorifier,...

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