Freestyle 80 - General Piping Information; System and Zone Pipe Sizing; System Water Piping Methods

Part number 550-142-850/0716
36
FreeStyle
®
WALL MOUNT GAS-FIRED WATER BOILER — Boiler Manual
16 Install water piping (continued)
This boiler is NOTINTENDEDFORCONNECTIONWITHA
REFRIGERATIONSYSTEM
Use two wrenches when tightening water piping
ATBOILERUSING ONE OFTHEWRENCHESTOPREVENT
THEBOILERINTERIORPIPINGFROMTURNING&AILURETO
support the boiler piping connections to prevent
THEMFROMTURNINGCOULDCAUSEDAMAGETOBOILER
components.
General piping information
!DDITIONALCONTROLSIFREQUIRED
The FreeStyle® control uses temperature sensors to
provide both high limit protection and modulating
temperature control. 4HE CONTROLS HIGH LIMIT
FUNCTION REQUIRES MANUAL RESET
. Some codes/
jurisdictions may require additional external
CONTROLSFORHIGH LIMIT ANDOR LOWWATER CUTOFF
protection.
!DDITIONALLIMITCONTROLS
&OLLOWINGSTANDARDINDUSTRYPRACTICESIFINSTALLATIONISTOCOMPLY
WITH!3-%REQUIREMENTSANADDITIONALHIGHTEMPERATURELIMIT
MAYBE NEEDED#ONSULTLOCAL REQUIREMENTSFOR OTHER CODES
STANDARDSTODETERMINEIFNEEDED
1. Install a manual reset high temperature limit to prevent a
temperature above 200°F in system supply piping between
boiler and isolation valve. (Note that the control operating
LIMITFUNCTIONSHUTSTHEBOILERDOWNAT&ORLOWERIFSET
to a lower value.)
-ULTITEMPERATURESYSTEMS)FTHEHEATINGSYS-
tem includes circuits that require lower temperature
WATERRADIANTSLABCIRCUITSFOREXAMPLEASWELLAS
higher temperature circuits, it is recommended to
protect low temperature circuits with limit controls
that are wired to the control external limit circuit
terminals.
,OWTEMPERATURESYSTEMS)FUSINGTEMper-
ature-limited materials (such as PEX tubing) in
system piping, it is recommended to protect the
system with limit controls that are wired to the
controls external limit circuit.
2. See instructions beginning on page 50FORWIRINGINFORMATION
3. )FUSINGAMANUALRESETLIMITCONTROLORWIRINGINTHEMANUAL
reset circuit, set FreeStyle® control boiler limit at least 20°F
less than the external manual reset limit (i.e., set FreeStyle®
CONTROLNOHIGHERTHAN&FORA&EXTERNALLIMITFOR
example).
"ACKmOWPREVENTER
1. 5SEBACKmOWPREVENTERINTHECOLDWATERSUPPLYPIPINGIF
required by local codes.
System/zone pipe sizing
"ASEBOARDCONVECTORSORCASTIRONRADIATORS/.,9
1. For residential space heating applications (other than radiant
heating or unit heaters) ONLY, you can use the sizing sug-
gestions in Figure 43.
Studies have indicated that dangerous bacteria
CANFORMINPOTABLEWATERDISTRIBUTIONSYSTEMS
IFCERTAINMINIMUMWATERTEMPERATURESARENOT
MAINTAINED#ONTACTLOCALHEALTHDEPARTMENTFOR
MOREINFORMATION
Figure 43 3UGGESTEDPIPESIZINGFORSYSTEMHEADERS
ANDZONEPIPING2%3)$%.4)!,WITH
BASEBOARDCONVECTORSORCASTIRONRADIATORS
/.,9&TEMPERATURERISE
System water piping methods
0RIMARYSECONDARYPIPINGTOBOILER
5SINGPRIMARYSECONDARYPIPINGWILLPROVIDETHEMOSTEFlCIENT
ANDRELIABLEOPERATIONOFTHEBOILERANDTHEHEATINGSYSTEM
1. 5SEINFORMATIONBEGINNING ON page 37 TOSIZE PUMP FOR
proper flow through the
FreeStyle® boiler.
 2EFERENCESUGGESTEDPIPINGLAYOUTSONPAGES38-43.
FreeStyle
®
-ODEL 3YSTEMHEADER
&3 vORLARGER
2ECOMMENDATIONSAREBASEDONA&TEMPERATUREDROP
THROUGHTHESYSTEM
3UGGESTEDMAXIMUMLOADPERZONE
#OPPERPIPEAND
BASEBOARDSIZE
-AXIMUMRECOMMENDED
FEETOFBASEBOARD
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v 
3IZEZONECIRCULATORSTOHANDLETHEREQUIREDmOWANDHEAD
LOSSFOREACHZONE