Hoval products must be installed and commissioned only by appropriately qualified experts. These instruc-tions are intended exclusively for the specialist. Elec-trical installations may only be carried out by a qualified electrician.

These instructions apply to the following types:5/6-Modul-plus F (21)5/6-Modul-plus F (31)5/6-Modul-plus F (41)5/6-Modul-plus F (51)5/6-Modul-plus F (32)5/6-Modul-plus F (42)5/6-Modul-plus F (52)

Modul-plus (F21-52)High performance calorifiers

The calorifiers Modul-plus are suitable and approved as heat generators for hot water heating systems with permissible hot water temperatures up to 90 °C 1). They are designed for closed systems, but can also be incor-porated in open systems according to DIN 4751.1) see section technical data

4 210 855 / 00 - 02/13Subject to modifi cations | EN

Technical informationInstallation instructions

4 200 690 / 07 - 08/16

1. Important information ............................................................................................................................. 31.1 Important installation information .....................................................................................................................................31.2 Delivery ................................................................................................................................................................................31.3 Other instructions ...............................................................................................................................................................3

2. Assembly ................................................................................................................................................. 52.1 Installation, levelling ..........................................................................................................................................................52.1.1 Space requirements ..........................................................................................................................................................52.2 Mounting the bottom guide rails .........................................................................................................................................52.3 Mounting the insulation (Fig. 04) .......................................................................................................................................62.4 Fitting the cladding (Fig. 07) ...............................................................................................................................................8

3. Technical information ........................................................................................................................... 103.1 Description of the calorifier ..............................................................................................................................................103.2 Technical Data ................................................................................................................................................................... 113.2.1 Hot water output at 70 °C heating flow temperature ........................................................................................................123.2.2 Hot water output at 80 °C heating flow temperature ........................................................................................................123.2.3 Hot water output at 90 °C heating flow temperature ........................................................................................................133.3 Dimensions ........................................................................................................................................................................143.4 Transport dimensions .......................................................................................................................................................15

4. Installation ............................................................................................................................................. 164.1 Heating-side connections .................................................................................................................................................164.2 Drinking water-side connections ......................................................................................................................................164.2.1 Instructions concerning safety valve: ...............................................................................................................................174.2.2 Instructions concerning the blow-off line: .........................................................................................................................174.2.3 Installing a pressure reducer ...........................................................................................................................................174.2.4 Measures to prevent the back-flow of heated water .........................................................................................................174.3 Electrical connection .........................................................................................................................................................17

5. Commissioning ..................................................................................................................................... 18

6. Maintenance and regular inspection .................................................................................................... 18

7. Warranty and guarantee........................................................................................................................ 18

2 4 200 690 / 07

TABLE OF CONTENTS

1. Important informationThis system is only to be placed in operation when all rel-evant standards and safety regulations have been com-plied with.

1.1 Important installation information

The hot water storage tank must be in-stalled in a frost-protected room. To re-strict heat losses in the pipelines to a min-imum the hot water storage tank should be erected as close as possible to the tap.

• These instructions are to be kept in the vicinity of the installation location.

• The installation, placing in operation and maintenance work is to be carried according to this document by a trained tradesman.

• Regular maintenance of the appliance is necessary for its safe and reliable op-eration.

• No modifications are to be carried out to the calorifier, otherwise the liabilities under the guarantee are waived.

• Heating and drinking water are not to come into contact with each other. In particular the service water is not to cir-culate through the heat exchanger.

1.2 DeliveryThe Modul-plus is delivered in three parts: - Modul-plus - Cardboard box containing the cladding, insulation and small assembly items and the bottom guide rail

- Electrical box, packed in a foam container

Fig. 01

1.3 Other instructionsDepending on the model, any other necessary instruc-tions are enclosed with the individually packed compo-nents.

- Burner - Control - Heating fittings group - Accessories

Further sources of information - Hoval catalogue - Standards, regulations

34 200 690 / 07

IMPORTANT INFORMATION

4 4 200 690 / 07

NOTES

2. Assembly2.1 Installation, levelling Before fitting the insulation and cladding, the calorifier must be levelled with a spirit level so that the longitudinal axis of the topmost boiler element is exactly horizontal.

2.1.1 Space requirementsAt least 40 cm to the left and right hand sides.If these distances cannot be observed, the calorifier must be insulated before being placed in position.

2.2 Mounting the bottom guide railsCheck the dimension H between the retaining rail and the plinth rail (Fig. 02). The rails (1) are fixed to the plinth rail with hexagon screws (Fig. 03).

Attention: For types F 32,42,52 - Hole A For types F 21,31,41,51 - Hole B

H

1

Hole A

Hole B

Type H

F 21,31,32 1454F 41,42 1639F 51,52 1999

Fig. 02

Fig. 03

54 200 690 / 07

ASSEMBLY

2.3

Moun

ting

the

insu

latio

n (F

ig. 0

4) -W

rap

the

min

eral

woo

l mat

s (1

-5) (

join

at t

he to

p, b

lack

sid

e ou

twar

ds) a

roun

d th

e ca

lorifi

er a

nd fi

x w

ith th

e pl

astic

stra

ps (6

). Th

e pl

astic

stra

ps (6

) (pa

cked

in

the

plas

tic b

ag) a

re jo

ined

by

a st

rap

fast

ener

(7).

Do

not f

aste

n to

o tig

htly

as

this

will

redu

ce th

e in

sula

tion

valu

e of

the

mat

s. T

ensi

on s

prin

gs (8

) ser

ve fo

r ad-

ditio

nal fi

xing

.

-N

ext t

he h

ot w

ater

pip

e at

the

top,

insi

de th

e cl

addi

ng is

insu

late

d w

ith th

e m

at (9

) (fix

with

tens

ion

sprin

g).

-M

ount

the

ther

mal

insu

latio

n co

vers

(10)

to th

e fro

nt s

ide.

7

6 4 200 690 / 07

ASSEMBLY

76

35

You

mus

t cut

out

the

insu

latio

n in

ord

er

to c

reat

e sp

ace

for t

he e

lect

rical

box

–

see

draw

ing

(sha

ded

area

)!

4,5

3

1,2

910

10

6

8

7

Fig.

04

74 200 690 / 07

ASSEMBLY

2.4

Fitti

ng th

e cl

addi

ng (F

ig. 0

7) -Fi

rst t

he fr

ont b

ase

plat

e (1

1) is

inse

rted

from

the

front

. The

n th

e tw

o ba

se p

late

s (1

2) a

re p

lace

d in

pos

ition

from

the

side

, bet

wee

n th

e pl

inth

rails

.

-Th

e fro

nt s

ide

plat

es (1

3) a

re fi

rst p

lace

d in

the

guid

e ra

ils a

t the

bot

tom

(Fig

. 10)

and

then

atta

ched

at t

he to

p to

the

reta

inin

g ra

ils. P

ush

the

side

pla

tes

(13)

bac

k ag

ains

t the

reta

inin

g ra

ils a

s fa

r as

the

stop

(see

Fig

. 05)

.

-Th

en th

e ot

her s

ide

plat

es (1

4,15

) are

fitte

d. J

oin

the

front

sid

e pl

ates

(13)

to th

e bo

ttom

gui

de ra

ils w

ith s

prin

g cl

ips

(16,

Fig

. 08)

Pus

h th

e si

de p

late

s (1

4,15

) w

ell f

orw

ard

so th

at th

ere

is n

o ga

p an

d th

en fi

x th

e pl

ates

at t

he b

ack

to th

e bo

ttom

gui

de ra

ils w

ith th

e cl

ips.

-Fi

t the

C-c

lips

(17,

Fig

. 09)

to th

e re

tain

ing

rails

. Now

the

front

cla

ddin

g co

vers

(18.

19) (

with

F31

, 32,

51,

52)

or t

he fr

ont c

over

(with

F21

, 41,

42)

can

be

put i

n pl

ace.

The

n fit

the

furth

er c

over

(20)

. Do

not y

et ti

ghte

n th

e fix

ing

scre

ws

at th

e si

de.

iFo

r the

var

iant

with

bui

lt-in

Cor

rex

exte

rnal

cur

rent

ano

des,

pro

ceed

with

the

step

s de

scrib

ed in

the

encl

osed

ass

embl

y in

stru

ctio

ns!

-P

lace

the

clad

ding

bac

k w

all (

21) i

n po

sitio

n an

d fix

with

the

self-

tapp

ing

scre

ws.

-N

ext t

he p

anel

for t

he e

lect

rical

box

(22)

is in

stal

led

and

fixed

to th

e m

ount

ed s

crew

s w

ith c

ap n

uts

(23)

.

-M

ount

the

cabl

e gl

and

(24)

in th

e pa

nel w

ith th

e pl

astic

cou

nter

-nut

. Clo

se o

ff th

e ot

her h

oles

with

bla

nks

(25)

. Now

the

elec

trica

l box

(26)

ca

n be

pus

hed

in p

ositi

on. B

efor

ehan

d, p

leas

e ro

ute

the

capi

llarie

s to

the

rear

, thr

ough

the

open

ing

in th

e pa

nel (

22).

-In

sert

the

imm

ersi

on s

enso

rs fo

r the

tem

pera

ture

con

trolle

r and

the

ther

mom

eter

car

eful

ly in

to th

e im

mer

sion

sle

eve

(27)

of

the

corr

espo

ndin

g m

odul

e. D

o no

t rem

ove

the

plas

tic c

lip u

ntil

the

sens

or b

undl

e is

inse

rted

half

way

into

the

imm

er-

sion

sle

eve.

Then

pus

h th

e re

tain

ing

sprin

g (2

8, F

ig. 0

6) o

n th

e im

mer

sion

sle

eve

to p

reve

nt th

e th

erm

omet

er a

nd th

erm

osta

t se

nsor

s fro

m s

lippi

ng o

ut.

-W

ith th

e pl

acin

g in

pos

ition

of t

he fr

ont p

late

(29)

and

fixi

ng it

with

the

cap

nuts

(23)

, the

mou

ntin

g of

the

insu

latio

n an

d cl

addi

ng to

the

high

-per

form

ance

cal

orifi

er m

odul

e M

odul

-plu

s is

com

plet

ed.

28

Fig.

05

Fig.

06

8 4 200 690 / 07

ASSEMBLY

1112

13

14

15

16

17

18,1

9

2021

22 2325 24 26 27

29 23

Fig.

07

Fig.

08

Fig.

09

Fig.

10

94 200 690 / 07

ASSEMBLY

3. Technical information3.1 Description of the calorifierThe Modul-plus is a high-performance calorifier in cellular form.The calorifier part (cells and pipes) are of stainless steel, material No. 1.4401 and the heating jacket is of standard sheet steel. All cells have hand holes.The body is of sheet steel, with 2-colour (red/dark red) powder-paint finish.The thermal insulation is mineral wool matting with woven glass fibre and PU soft foam covers on the front.An electrical switch panel with thermometer and temperature controller is provided for installation in the front panel of the body.

10 4 200 690 / 07

TECHNICAL INFORMATION

3.2 Technical Data

Type F (21) F (31) F (41) F (51) F (32) F (42) F (52)

• Module numbers 2 3 4 5 6 8 10

Calorifier• Content litres 230 345 460 575 690 920 1150• Heating surface m2 2.84 4.26 5.68 7.1 8.52 11.36 14.2• Max. hot water temperature °C 95 95 95 95 95 95 95• Flow resistance 1 z value 1.4 2.4 3 3.6 0.74 0.9 1.1• Heat loss at 65 °C W 254 254 265 286 276 288 312

• Working pressure - normal type bar 6 6 6 6 6 6 6 - type high-rise building bar 10 10 10 10 10 10 10• Test pressure - normal type bar 12 12 12 12 12 12 12 - type high-rise building bar 16 16 16 16 16 16 16

• Weight without casing - normal type kg 165 215 265 315 370 470 570 - type high-rise building kg 205 275 345 415 490 630 770• Weight casing kg 104 104 115 140 121 135 160

Heating• Heating water content litres 30 45 60 75 90 120 150• Maximal heating water temperature °C 110 110 110 110 110 110 110• Flow resistance 1 z value 2 2.8 3.6 4.7 0.78 1 1.4

• Working pressure - normal type bar 5 5 5 5 5 5 5 - type high-rise building bar 8 8 8 8 8 8 8• Test pressure - normal type bar 8 8 8 8 8 8 8 - type high-rise building bar 12.8 12.8 12.8 12.8 12.8 12.8 12.8

1 Flow resistance (mbar) = volume flow (m³/h)2 x z

Flow resistance heating Flow resistance hot water

114 200 690 / 07

TECHNICAL INFORMATION

3.2.1 Hot water output at 70 °C heating flow temperatureHeating flow connected on the top of the calorifier (crosscurrent)

Hot water outputModul-plus

No. of modules

Con-tent

Heating surface Charging pump dm3/10 min. 2 dm3/h 3

Type dm3 m2 m3/h mbar1 Type mWC6 45 °C 60 °C 45 °C kW4 Flats5

F (21) 2 230 2.843.5 25 SPS.../7,5 2.9 434 640 1520 61.8 78 120 SPS.../12 6.5 488 960 2110 86.2 114 40 SPS.../8 5.7 575 700 2100 85.4 12

F (31) 3 345 4.26 7 120 SPS.../12 7.7 600 900 2800 113.9 1812 450 Stratos 40/12 4.5 635 1200 3600 146.5 254 55 SPS.../8 5.5 814 1100 2700 109.8 18

F (41) 4 460 5.68 8 240 SPS.../12 5.3 900 1700 4100 166.8 3110.5 440 Stratos 40/12 5.5 942 2000 4850 197.3 39

4 75 SPS.../8 5.3 1028 1250 3750 152.6 29F (51) 5 575 7.10 8 300 SPS.../12 4.7 1137 1900 5200 211.6 44

12 720 Stratos 50/16 7.5 1221 2400 6300 256.3 56

F (32) 6 690 8.52

8 45 SPS.../12 7.2 1151 1400 4200 170.9 3414 165 Stratos 40/12 6.2 1200 1800 5600 227.9 4918 300 Stratos 50/12 4.0 1234 2100 6200 252.3 5624 530 Stratos 65/12 2.5 1271 2400 7200 293.0 678 62 SPS.../12 6.7 1628 2200 5400 219.7 49

F (42) 8 920 11.36 12 150 Stratos 40/12 7.4 1714 2800 6700 272.6 6416 260 Stratos 40/12 4.5 1800 3400 8200 333.7 838 82 SPS.../12 6.9 2057 2500 7500 305.2 77

F (52) 10 1150 14.20 16 340 Stratos 40/12 3.7 2274 3800 104000 423.2 11621 610 Stratos 50/16 4.9 2391 4500 11800 480.2 136

3.2.2 Hot water output at 80 °C heating flow temperatureHeating flow connected on the top of the calorifier (crosscurrent)

Hot water outputModul-plus

No. of modules

Con-tent

Heating surface Charging pump dm3/10 min. 2 dm3/h 3

Type dm3 m2 m3/h mbar1 Type mWC6 45 °C 60 °C 45 °C kW4 Flats5

F (21) 2 230 2.843.5 25 SPS.../7,5 2.9 478 900 1880 76.5 108 120 SPS.../12 6.5 542 1300 2840 115.5 184 40 SPS.../8 5.7 652 1350 2800 113.9 18

F (31) 3 345 4.26 7 120 SPS.../12 7.7 706 1800 3650 148.5 2512 450 Stratos 40/12 4.5 778 2400 4600 187.2 354 55 SPS.../8 5.5 907 1750 3350 136.3 24

F (41) 4 460 5.68 8 240 SPS.../12 5.3 1042 2700 5250 213.6 4310.5 440 Stratos 40/12 5.5 1113 3200 6150 250.2 53

4 75 SPS.../8 5.3 1187 2200 4900 199.4 40F (51) 5 575 7.10 8 300 SPS.../12 4.7 1356 3200 6600 268.6 59

12 720 Stratos 50/16 7.5 1477 3950 7900 321.5 74

F (32) 6 690 8.52

8 45 SPS.../12 7.2 1305 2700 5600 227.9 4914 165 Stratos 40/12 6.2 1413 3600 7300 297.0 6918 300 Stratos 50/12 4.0 1485 4200 8100 329.6 7924 530 Stratos 65/12 2.5 1556 4800 9200 374.4 938 62 SPS.../12 6.7 1814 3500 6700 272.6 64

F (42) 8 920 11.36 12 150 Stratos 40/12 7.4 1970 4600 8700 354.0 8916 260 Stratos 40/12 4.5 2113 5400 10500 427.3 1148 82 SPS.../12 6.9 2374 4400 9800 398.8 107

F (52) 10 1150 14.20 16 340 Stratos 40/12 3.7 2713 6400 13200 537.2 15721 610 Stratos 50/16 4.9 2877 7400 15600 634.8 195

12 4 200 690 / 07

TECHNICAL INFORMATION

3.2.3 Hot water output at 90 °C heating flow temperatureUse only if high performance is permanently expected (e.g. industry, commercial enterprise).Heating flow connected on the top of the calorifier (crosscurrent)

Hot water output Modul-plus

No. of modules Content

Heat surface Charging pump dm3/10 min. 2 dm3/h 3

Type dm3 m2 m3/h mbar1 Type mWC6 45 °C 60 °C 45 °C kW4

F (21) 2 230 2.843.5 25 SPS.../7,5 2.9 550 1360 2250 91.5

8 120 SPS.../12 6.5 650 1960 3480 141.6

4 40 SPS.../8 5.7 713 1850 3450 140.4

F (31) 3 345 4.26 7 120 SPS.../12 7.7 793 2550 4300 175.0

12 450 Stratos 40/12 4.5 893 3300 5800 236.0

4 55 SPS.../8 5.5 978 2250 4100 166.8

F (41) 4 460 5.68 8 240 SPS.../12 5.3 1157 3500 6400 260.4

10.5 440 Stratos 40/12 5.5 1250 4150 7500 305.2

4 75 SPS.../8 5.3 1329 3050 5650 229.9

F (51) 5 575 7.10 8 300 SPS.../12 4.7 1543 4350 7800 317.4

12 720 Stratos 50/16 7.5 1692 5250 9100 370.3

F (32) 6 690 8.52

8 45 SPS.../12 7.2 1426 3700 6900 280.8

14 165 Stratos 40/12 6.2 1585 5100 8600 350.0

18 300 Stratos 50/12 4.0 1671 5800 9800 398.8

24 530 Stratos 65/12 2.5 1785 6600 11600 472.0

8 62 SPS.../12 6.7 1956 4500 8200 333.7

F (42) 8 920 11.36 12 150 Stratos 40/12 7.4 2142 5800 10400 423.2

16 260 Stratos 40/12 4.5 2314 7000 12800 520.9

8 82 SPS.../12 6.9 2658 6100 11300 459.8

F (52) 10 1150 14.20 16 340 Stratos 40/12 3.7 3085 8700 15600 634.8

21 610 Stratos 50/16 4.9 3316 10 000 17500 712.2

1 mbar = flow resistance in the calorifier1 Litres/10 min. = calorifier heated up to 60 °C3 Litres/h = continual output per hour, cold water temperature 10 °C.4 kW = power input at 45 °C/ 10 °C5 Flats = number of flats with 1 bath each which can be supplied with hot water (1 bath, 3-4 rooms, 4 persons per flat)6 mWC = residual overpressure

134 200 690 / 07

TECHNICAL INFORMATION

3.3 Dimensions

* Operating pressure 5 bar = standard flanges PN6F 21-51 DN 50F 32-52 DN 65

* Operating pressure 8 & 10 bar = special flangesD k d

F 21-51 DN 50 140 110 14F 32-52 DN 65 160 130 14

Variation because of the production tolerance possibleDimension +/- 10 mm

1 Hot water 2″2 Cold water 2″3 Circulation 1″4 Heating flow *5 Heating return *6 Control panel7 Electrical connection

Type B H

F (21)/1615 530 1615F (31)/1615 530 1615F (41)/1800 530 1800F (51)/2160 530 2160

Type B H

F (32)/1615 885 1615F (42)/1800 885 1800F (52)/2160 885 2160

1 Warmwasser 2"2 Kaltwasser 2"3 Zirkulation 1"4 Vorlauf Heizung*5 Rücklauf Heizung* 6 Elektrokasten7 Elektro-Anschluss

Typ

F 21/1615F 31/1615F 41/1800F 51/2160

B

530530530530

H

1615161518002160

Typ

F 32/1615F 42/1800F 52/2160

B

885885885

H

161518002160

Aufgrund von FertigungstoleranzenAbweichungen möglich.Masse +/- 10mm

R 008 094-3 0205.06.2014 SEEN

Seite 1 / 2

B

H

12

0

Typ F21, F41, F42

6

1 9 0 29

0

5 0

1 1 5

2 0 0 1 5 0

1 9 0 51 8 2

1 4 7 14

0

65

1 0 01 0 0

90

3 9 5

Typ F21, F41

532

90

3 0 0

14

0

65

7 9 0

Typ F42

65 14

0

90

3 0 0

7 9 0

Typ F32, F52

B

H

12

0

Typ F31, F51, F32, F52

6

1 9 0 2

1 7 01 5 0

1 9 0 51 8 2

5 0

1 1 5

90

1

74

90

1 0 0 1 0 0

14

0

65

3 9 5

Typ F31, F51

5

3

2

Dk

d

*Betriebsdruck 5 bar = Normflansche PN6F 21 - 51 DN50F 32 - 52 DN65

*Betriebsdruck 8 & 10 bar = Spezial-Flansche

F 21 - 51 DN50 F 32 - 52 DN65

D k d 140 110 14 160 130 14

Type F (31), F (51), F (32), F (52) Type F (31), F (51) Type F (32), F (52)

Type F (21), F (41), F (42) Type F (21), F (41) Type F (42)

14 4 200 690 / 07

TECHNICAL INFORMATION

3.4 Transport dimensions

Type Widtha

Heightb

F (21) 395 1755F (31) 395 1755F (41) 395 1940F (51) 395 2300F (32) 790 1755F (42) 790 1940F (52) 790 2300

154 200 690 / 07

TECHNICAL INFORMATION

4. Installation4.1 Heating-side connections

Hydraulic examplesCalorifier in a heat and power station

21

3

M

4

4

Connection to space heating district heating line max. 110 °C, 8 bar (type high-rise building)(the appropriate factory guidelines have to be respected for long-distance heat supplies).

3 3

54

6

M M

Calorifier in sub-station

1 Loading pump controlled by the calorifier temperature control

2 Return flow prevention shutting tightly3 Automatic ventilator4 Sack to prevent an one-pipe-gravity-circulation.

Height min. 3 x pipe diameter5 Motor straight way valve. Valve moving time

max. 2 min., with manual emergency function (e.g. spring return)

6 Motor three way valve, valve moving time max. 2 min., with manual emergency function

4.2 Drinking water-side connectionsExecution according to DIN 1988 part 2 and DIN 4753 part 1. - Before establishing the hydraulic connection it is abso-lutely imperative to flush the supply pipelines out thor-oughly. This will prevent the entry of metal chips and dirt into the water storage tank.

- Shut-off valves in the primary and secondary circuit permit maintenance to the storage tank and its compo-nents without the need to drain the complete system.

- These valves also permit the disconnection of the calo-rifier for pressure tests on the system, in the event of the test pressure being higher than the permissible op-erating pressure for the calorifier.

- Each closed drinking water calorifier is to be fitted with at least one approved (carrying a TÜV test mark) mem-brane safety valve. The nominal width of the safety valves is determined according to DIN 1988 part 2 sect. 4.3.4.1.1 – Table 5.

Rated volumeLitre

Heating capacitykW

maximum

Size of safety valve (size of inlet connector)

minimum ≤200 75 R or Rp ½ >200 ≤1000 150 R or Rp ¾>1000 ≤5000 250 R or Rp 1>5000 >250 accord. to standards

and regulations

Schematic connection diagram of the sanitary connection2 calorifiers connected in parallel

1

23

2

1

32

1

3

1 = cold water2 = hot water3 = circulation

16 4 200 690 / 07

INSTALLATION

4.2.1 Instructions concerning safety valve: - it must be installed in the cold water line. - there are to be no shut-off fittings between the safety valve and the storage tank.

- it is to be installed, easily accessible, close to the stor-age tank. The supply line is to be executed in at least the nominal width of the valve.

- It is to be installed sufficiently high to enable the follow-ing blow-off line to be installed with a downward gradi-ent. Recommendation: Mount above the top surface of the storage tank, so that the storage tank does not have to be drained in the case of work / replacement.

4.2.2 Instructions concerning the blow-off line: - the end of the blow-off line must terminate 20 - 40 mm above a drain funnel and be placed where it is visible.

- The size of the line is to be at least identical to the outlet cross-section of the safety valve, a max. 2 m long and with no more than 2 bends.

- The drain line after the drain funnel must be at least double the cross-section of the blow-off line.

A plate with the following notice must be placed in the vicinity of the safety valve blow-off line, where possible on the safety valve itself:

During heating, water can be discharged from the blow-off line for safety reasons!

Do not seal off!

4.2.3 Installing a pressure reducerA pressure reducer is to be installed before the calorifier if the operating over-pressure exceeds 80 % of the safety valve response pressure.

It is expedient to install the pressure reducer after the wa-ter meter system, so that approximately the same pres-sure conditions prevail in the building cold and hot water pipes.

4.2.4 Measures to prevent the back-flow of heated water

A back-flow restrictor is to be installed in the cold water supply line, irrespective of the type of heating of the drink-ing water calorifier.

In the case of closed drinking water calorifiers, shut-off devices are to be installed in the accessible vicinity be-fore and after the back-flow restrictor for testing and re-placement purposes.

4.3 Electrical connection

230 V

Screws loosen

Control

The electrical circuit diagram is in the control.

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INSTALLATION

5. CommissioningBefore filling the calorifier, the cold water supply line and the complete service water circuit are to be flushed. Dur-ing filling, all the air present in the storage tank, the pipes and fittings is to be bled out. This will prevent disturbing pressure ”hammering” effects in the hot water system. For this the storage tank is to be completely filled with water. At least one hot water outlet is to be open. Bleed the air from all hot water pipes and taps. After filling, the covers of the maintenance flange and all sanitary and heating-side connectors and connections are to be checked for leaks and sealed where necessary.

During heating, water can be discharged from the blow-off line due to the expan-sion of the water. This is a perfectly nor-mal phenomenon and must in no case be prevented.

6. Maintenance and regular inspectionCleaning and decalcification of the module cellsRegular cleaning and removal of sludge from the mod-ule cells is necessary for hygienic reasons. The cleaning intervals are dependent on water quality, operating tem-perature and hot water consumption.The cleaning work is only to be undertaken by the Hoval customer service agent or a specialist firm.Replacement flange seals are to be available and ready to hand before opening the cleaning flange. The old seals must be replaced.The sludge and lime deposits are washed off with a wa-ter jet and removed or extracted by vacuum through the cleaning flange.Lime encrustation on the tank walls must not be removed with metal objects. Chemical cleaning is only to be carried out by firms with the relevant equipment and experience.Refit the flange cover with new seals.Check for leaks. Observe the increase in pressure during the heating process and check the function of the safety valve.

Safety deviceTo avoid a possible over-pressure in the storage tank and the distribution circuit, the correct function of the safety device must be checked once a month.

7. Warranty and guaranteeClaims under the manufacturer’s guarantee can only be made if the following conditions are complied with:

Guarantee conditions: • Connection according to specifications by an author-

ised installation firm. • Fitting of a fine filter in the cold water inlet. • sanitary side: Water of drinking water quality standard;

max. chloride content 30 mg Cl/litre, with the special model, max. 100 mg/litre resp.200 mg/litre with mag-nesium anode.

• heating side: The chloride content of the filling and replacement water for the heating system must be < 50 mg/l, otherwise it must be desalinated.

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Confirmation

The user (owner) of the system herewith confi rms that• he has received adequate instruction in the operating and maintenance of the installation,• received and taken note of the operating and maintenance instructions and, where applicable other documents con-

cerning the heat generator and any further components.• and is consequently suffi ciently familiar with the installation.

Installation address: Type:

Serial number:

Year of manufacture:

Place, Date:

System installer: System user:

Confirmation

The user (owner) of the system herewith confi rms that• he has received adequate instruction in the operating and maintenance of the installation,• received and taken note of the operating and maintenance instructions and, where applicable other documents con-

cerning the heat generator and any further components.• and is consequently suffi ciently familiar with the installation.

Installation address: Type:

Serial number:

Year of manufacture:

Place, Date:

System installer: System user:

COPY FOR PLANT USER

COPY OF SYSTEM INSTALLER