Freestyle 80 - Install Water Piping; Domestic Water Piping (Combi Boiler)

Part number 550-142-850/0716
35
FreeStyle
®
WALL MOUNT GAS-FIRED WATER BOILER — Boiler Manual
16 Install water piping
Domestic Water Piping – Combi Boiler
s 4HERMOSTATIC-IXING6ALVE!MIXINGVALVEFORREGULATINGDOMES-
tic heating water ) must be used to regulate the water temperature
leaving the plate heat exchanger. NOTE: the valve must be set
TOSUPPLYADOMESTICWATERTEMPERATUREOFNOTMORETHAN
DEGREES&)TISTHERESPONSIBILITYOFTHEINSTALLERTOSETTHEVALVE
and remove the dial.
s $(7&ILTER)NSTALLATIONOFAMICRONORLOWERWATERlLTERAT
THEENTRANCEOFTHE$(7CONNECTIONTOPROTECTTHE$(7mOW
SWITCH&AILURETOINSTALLTHE$(7WATERlLTERFROMDIRTANDDEBRIS
WILLCAUSEITTOMALFUNCTION
s #HECK6ALVE!CHECKVALVEMUSTBElELDPROVIDEDANDINSTALLED
ONTHEOUTLETOFTHEMIXINGVALVETOPREVENTEXPANSIONDEVICES
DOWNSTREAMFROMBACKmOWINGWHENTHEWATERPRESSUREDROPS
during cold water draws. Failure to prevent the backflow will
cause water to flow through the flow switch, activating it, when
the cold water draw has ended and the water pressure increases.
s $RAINAND)SOLATION6ALVES)NSTALLDRAINANDISOLATIONVALVESON
THEINLETANDOUTLETOFTHE$(7CONNECTIONSSOTHATTHE$(7
HEATEXCHANGERCANBEmUSHEDANDCLEANEDFROMPOSSIBLEBUILDUP
caused by dirty or hard water, which is a maintenance require-
ment.
s (ARD7ATER4OPREVENTTHEFORMATIONOFSCALEONTHEINSIDEOF
the plate DHW heat exchanger and other components in the do-
mestic hot water system, water with hardness higher than 50 ppm
#ALCIUM#ARBONATEMUSTBETREATEDWITHAh7ATER3OFTENERvPRIOR
TOENTERINGTHEBOILER0LUGGINGOFTHEDOMESTICSYSTEMBYSCALING
ORACCUMULATIONOFDIRTISNOTTHERESPONSIBILITYOF7ILLIAMSON
Thermoflo, and suitable steps must be taken to avoid it.
s #LEANINGREFERTOTHEINSTALLATIONMANUALMAINTENANCESECTIONFOR
THEPROPERCLEANINGPROCEDUREFORTHEPLATE$(7HEATEXCHANGER
ANDTHEREQUIREDCLEANINGFREQUENCY
Minimum -AXIMUM
$(7
0RESSURE
2ATING
03)' 4.5 130
Hot Water Can Scald!
s #ONSUMER0RODUCT3AFETY#OMMISSIONANDSOME
states recommend domestic hot water tempera-
TUREOF&ORLESS
s When installing an automatic mixing valve, se-
lection and installation must comply with valve
MANUFACTURERSRECOMMENDATIONSANDINSTRUCTIONS
s 7ATERHEATEDTOATEMPERATURESUITABLEFORCLOTHES
washing, dish washing and other sanitizing needs
will scald and cause injury.
s #HILDRENELDERLYINFIRM ORPHYSICALLYHANDI-
capped persons are more likely to be injured by
hot water. Never leave them unattended in or near
a bathtub, shower or sink. Never allow small chil-
DRENTOUSEAHOTWATERFAUCETORDRAWTHEIROWN
BATH)FANYONEUSINGHOTWATERINTHE BUILDING
lTSTHISDESCRIPTIONORIFSTATELAWSORLOCALCODES
require certain water temperatures at hot water
FAUCETSTAKESPECIALPRECAUTIONS
s Install automatic mixing valve set according to
those standards.
s Use lowest practical temperature setting.
s #HECKWATERTEMPERATUREIMMEDIATELYAFTERlRST
HEATINGCYCLEANDAFTERANYADJUSTMENT
)FTHEBOILERPIPINGSYSTEMISCONNECTEDTOHEATINGCOILS
located in air handling units where there may be exposed
TOREFRIGERATEDAIRCIRCULATIONTHENITMUSTBEEQUIPPED
with flow control valves or other automatic means to
PREVENTGRAVITYCIRCULATIONOFTHEBOILERWATERDURINGTHE
cooling cycle.
4OPIPE$(7
1. Size piping no smaller than flat plate heat exchanges
inlet and outlet.
2. !DDITIONALANTISCALDDEVICESMAYBE INSTALLEDATEACH
HOTWATERFAUCETBATHANDSHOWEROUTLET
3. )NHARDWATERAREASSOFTENCOLDDOMESTICSUPPLYWATER
to heaters to prevent scale build-up.
4. 2EFERTOFigure 41BELOWFORMAXIMUMANDMINIMUM
DOMESTICWATER PRESSURE RATING FOR OUR UNITSONTHE
domestic pipes (Combi only).
5. )NSTALLlELD SUPPLIED DOMESTIC WATERPRESSURERELIEF
VALVEWITHAMAXIMUMPRESSURERATINGOFPOUNDS
Figure 41 $OMESTICWATERPRESSURERATING
Figure 42 $(7INLETHASAlLTERSCREEN
 Combi Boiler: Domestic water inlet connection showing filter
SCREENTOPROTECTPADDLEmOWSWITCHFROMSANDANDOTHERDEBRIS
Pipe in a “union” fitting below this adapter to service
this filter screen.