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Figure 31 4ERMINATIONSFORMULTIPLEBOILERS
 !LSO MAINTAIN MAXIMUMDISTANCES BETWEENTHE
VENTANDAIRPIPES FOR EACH BOILER ASSHOWNIN
Figure 30, page 27.
See notices on previous page.
Part number 550-142-850/0716
28
FreeStyle
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WALL MOUNT GAS-FIRED WATER BOILER — Boiler Manual
0REPAREROOFPENETRATIONS
1. !IRPIPEPENETRATION
a. #UTAHOLEFORTHEAIRPIPE3IZETHEAIRPIPEHOLEAS
close as desired to the air pipe outside diameter.
2. Vent pipe penetration:
a. #UTAHOLEFORTHEVENTPIPE&OREITHERCOMBUSTIBLE
or noncombustible construction, size the vent pipe
hole at least 0.4” larger than the vent pipe diameter.
b. Insert a galvanized metal thimble in the vent pipe
hole.
3. Space the air and vent holes
no closer than the minimum
spacings shown in Figure 23, page 24.
4. &OLLOWALL LOCAL CODESAND VENTPIPE MANUFACTURERS
INSTRUCTIONS FOR ISOLATION OFVENTPIPEWHENPASSING
THROUGHmOORSCEILINGSANDROOFS
5. 0ROVIDE mASHINGANDSEALING BOOTS SIZED FOR THEVENT
PIPEANDAIRPIPE&OLLOWALLVENTPIPEMANUFACTURERS
instructions.
Termination and fittings
1. Prepare the vent termination elbow and the air termina-
tion elbow (Figure 30, page 27) by inserting bird screens.
Bird screens must be purchased separately. See the parts
LISTATTHEENDOFTHISMANUALFORPARTNUMBERS
2. The air piping must terminate in a down-turned 180-de-
gree return bend as shown in Figure 30, page 27. Locate
THEAIRINLETPIPENOFURTHERTHANINCHESFROMTHE
CENTEROFTHEVENTPIPE4HISPLACEMENTAVOIDSRECIRCU-
LATIONOFmUEPRODUCTSINTOTHECOMBUSTIONAIRSTREAM
3. The vent piping must terminate in an up-turned cou-
pling as shown in Figure 30, page 274HE TOPOFTHE
coupling must be at least 12 inches above the air intake.
The air inlet pipe and vent pipe can be located in any
DESIREDPOSITIONONTHEROOFBUTMUSTALWAYSBENOFUR-
ther than 12 inches apart (center to center) and with the
vent termination at least 12 inches above the air intake.
4. -AINTAINTHEREQUIREDDIMENSIONSOFTHElNISHEDTERMI-
nation piping as shown in Figure 30, page 27.
5. $ONOTEXTENDEXPOSEDVENTPIPEOUTSIDEOFBUILDING
more than shown in this document. Condensate could
FREEZEANDBLOCKVENTPIPE
12 DIRECT VENT — 6ERTICALWITHSEPARATEPIPES(continued)