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Part number 550-142-850/0716
109
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WALL MOUNT GAS-FIRED WATER BOILER — Boiler Manual
33 Maintenance (continued)
"EFOREYOUSTARTCHECKTHECOMPATIBILITYOFCHEMI-
CALCLEANINGPRODUCTWITHTHEMATERIALOFTHEHEAT
EXCHANGER4HEMATERIALOF DOMESTICHOT WATER
CIRCUITISAUSTENITICSTAINLESSSTEELCLASS!)3)
Actions for chemical cleaning of
Domestic hot water circuit
1. $ISCONNECTTHEUNITFROMTHEELECTRICALPOWERSUPPLYUSING
THESWITCHANDORTHESPECIALCUTOFFDEVICES
2. #LOSETHEVALVEOFCOLDWATERINLETPLACEDBEFORETHEBOILER
inlet.
3. Release residual pressure in domestic hot water circuit in the
BOILERBYOPENINGAHOTWATERTAPDOWNSTREAMOFTHEBOILER
4. $ISCONNECTTHEPIPINGFROMv COLDWATERINLETAND
domestic hot water outlet (2).
5. #ONNECTTHETWOHOSESOFTHEPUMPFORCHEMICALCLEANINGTO
the 1/2” cold water inlet (4) and domestic hot water outlet
(2).
6. Fill the pump tank with the de-scaling chemical that is NSF
approved.
7. Circulate the fluid within the domestic hot water circuit by
activating the pump switch.
8. The processing 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
9. !TTHE ENDOFTHE CLEANING CYCLEEMPTYTHE PUMP FROM
chemical and recover the product in appropriate containers
FORDISPOSAL
10. &ILLTHEPUMPWITHWATERANDPERFORMAWASHINGCYCLEIN
order to remove the chemical product still present within the
COILSOFTHEHEATEXCHANGERRECOVERINGTHELIQUIDINSUITABLE
CONTAINERSFORDISPOSAL
11. 2EPEATTHEWASHINGWITHWATERMORETHANONCEIFNECESSARY
12. $ISCONNECTTHETWOHOSESOFTHEPUMPFORCHEMICALCLEANING
FROMTHEvCOLDWATERINLETANDDOMESTICHOTWATER
outlet (2).
13. Reconnect the piping to 1/2” cold water inlet (4) and
domestic hot water outlet (2).
14. /PENTHEVALVEOFCOLDWATERINLETPLACEDBEFORETHEBOILER
inlet.
15. Reconnect the unit to the electrical power supply using the
SWITCHANDORTHESPECIALCUTOFFDEVICESANDTURNIT/.
16. #HECKTHECORRECTOPERATIONOFTHEBOILERANDFUNCTIONALITY
OFPRODUCTIONOFDOMESTICHOTWATER
Hot Water Can Scald!
s #ONSUMER0RODUCT3AFETY#OMMISSIONANDSOME
STATESRECOMMENDDOMESTICHOTWATERTEMPERATUREOF
130°F or less.
s When installing an automatic mixing valve, selection
ANDINSTALLATIONMUSTCOMPLYWITHVALVEMANUFAC-
TURERSRECOMMENDATIONSANDINSTRUCTIONS
s 7ATERHEATEDTOATEMPERATURESUITABLEFORCLOTHES
washing, dish washing and other sanitizing needs will
scald and cause injury.
s Children, elderly, infirm, or physically handicapped
persons are more likely to be injured by hot water.
Never leave them unattended in or near a bathtub,
shower or sink. Never allow small children to use a hot
WATERFAUCETORDRAWTHEIROWNBATH)FANYONEUSING
HOTWATERINTHEBUILDINGlTSTHISDESCRIPTIONORIF
state laws or local codes require certain water tempera-
TURESATHOTWATERFAUCETSTAKESPECIALPRECAUTIONS
s Install automatic mixing valve set according to those
STANDARDS)FUSED
s Use lowest practical temperature setting.
s #HECKWATERTEMPERATUREIMMEDIATELYAFTERlRSTHEAT-
INGCYCLEANDAFTERANYADJUSTMENT
Studies have indicated that dangerous bac-
TERIACAN FORMIN POTABLE WATERDISTRIBU-
TIONSYSTEMS IFCERTAIN MINIMUMWATER TEM-
peratures are not maintained. Contact local
HEALTHDEPARTMENT FORMOREINFORMATION
These single wall heat exchangers comply with National
Standard Plumbing Code, provided that:
s Boiler water (including additives) is practically non-
TOXICHAVINGATOXICITYRATINGORCLASSOFASLISTEDIN
#LINICAL4OXICOLOGYOF#OMMERCIAL0RODUCTS
s Boiler water pressure is limited to max. 30 psig by
APPROVEDWATERRELIEFVALVE
Actions for disassembling of the
Domestic hot water flat plate heat
exchanger
Consider removing side panels as noted on page 99.
1. $ISCONNECTTHEUNITFROMTHEELECTRICALPOWERSUPPLYUSING
THESWITCHANDORTHESPECIALCUTOFFDEVICES
2. #LOSETHEVALVEOFCOLDWATERINLETPLACEDBEFORE THEBOILER
inlet.
3. Release residual pressure in domestic hot water circuit in the
BOILERBYOPENINGAHOTWATERTAPDOWNSTREAMOFTHEBOILER
Wait until heat exchanger/boiler is cooled
DOWNBEFOREPROCEEDING7ATERINBRAZED
plate heat exchanger may still be HOT!
Failure to do so can cause severe injury.