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Part number 550-142-850/0716
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WALL MOUNT GAS-FIRED WATER BOILER — Boiler Manual
Figure 1482EMOVALOFmATPLATEHEATEXCHANGER
SCREWONLEFTSIDE
33 Maintenance (continued)
&IGURE0RESSURERELEASEFORDOMESTICWATERCIRCUIT
#OMBI/NLY
3YSTEMSUPPLY
$OMESTICHOTWATEROUTLET
3 Gas inlet
$OMESTICCOLDWATERINLET
3YSTEMRETURN
6
0RESSURERELIEFSCREW
1
2
3
4
5
6
4. #LOSETHEVALVEOF#(SYSTEMSUPPLYANDRETURNPLACED
BEFORETHEBOILERCONNECTIONS
5. 2ELEASETHEPRESSUREOF#(CIRCUITBYLOOSINGTHEPLASTICSCREW
placed next to the CH return (5), see Figure 144.
Release Heat Exchanger pressure in the boiler by
LOOSINGTHEPLASTICSCREWOFTHEPUMPPLACEDNEXT
to heat exchanger return.
6. Remove the two (2) screws securing the plate heat exchanger
to the diverter valve and to the DHW inlet.
7. 0ULLOUTTHEmATPLATEHEATEXCHANGERPULLINGOUTANDUPFROM
THEREAROFTHEBOILER
e direction of arrows on heat exchanger.
e
brazed plate heat exchanger must be rein-
stalled in the same orientation.
4HENEXTTWOlGURESAREFORILLUSTRATINGAND
information only.
The gas valve does NOT need to be removed to
replace brazed plate heat exchanger
8. Flat plate heat exchanger can be immersed in a chemical
cleaning bath.
9. The treatment time must be chosen according to the amount
OFSCALEDEPOSITSPRESENTINTHEEXCHANGERANDHOWEVERSUCH
time must always be less than the maximum treatment time
SPECIlEDBYTHEMANUFACTURERONTHEPRODUCTDATASHEET
DHW returns
(diverter valve)
DHW inlet
Figure 1492EMOVALOFmATPLATEHEATEXCHANGER
SCREWONRIGHTSIDE
Figure 1502EINSTALLTHEFOURGASKETSINTO$(7INLETS
ANDRETURNSCOMPONENTSREMOVEDTOSHOW
GASKETLOCATIONSFORILLUSTRATINGPURPOSES