Theseinstructionsareintendedasageneralguideanddo
notsupersedelocalcodesinanyway Consultauthorities
havingjurisdictionbeforeinstallation
Inadditiontotherequirementsoutlinedpreviously,thefol-
lowinggeneralrecommendationsmustbe considered
wheninstallinga G61MPVfurnace:
• Placethefurnaceascloseto thecenterof theairdis-
tributionsystemaspossibleThefurnaceshouldalsobe
locatedclosetothechimneyorventterminationpoint
• Whenthefurnaceisinstalledinnon-directventapplica-
tions,donotinstallthefurnacewheredraftsmightblow
directlyintoit Thiscouldcauseimpropercombustion
andunsafeoperation
• Whenthefurnaceisinstalledinnon-directventapplica-
tions,donotblockthefurnacecombustionairopening
withclothing,boxes,doors,etcAirisneededforproper
combustionandsafeunitoperation
• Whenthefurnaceisinstalledinanatticor otherinsu-
latedspace,keepinsulationawayfromthefurnace
• Whenthe furnaceis installedin an unconditioned
space,considerprovisionsrequiredtopreventfreezing
ofcondensatedrainsystem
,CAUTION
WARNING
If the G61MPV is installed as a Non-Direct Vent Fur-
nace, follow the guidelines in this section.
NOTE- In Non-Direct Vent installations, combustion air is
taken from indoors and flue gases are discharged out-
doors.
WARNING
In the past, there was no problem in bringing in sufficient
outdoor air for combustion. Infiltration provided all the air
that was needed. In today's homes, tight construction prac-
tices make it necessary to bring in air from outside for com-
bustion, Take into account that exhaust fans, appliance
vents, chimneys, and fireplaces force additional air that
could be used for combustion out of the house, Unless out-
side air is brought into the house for combustion, negative
pressure (outside pressure is greater than inside pressure)
will build to the point that a downdraft can occur in the fur-
nace vent pipe or chimney, As a result, combustion gases
enter the living space creating a potentially dangerous situ-
ation.
In the absence of local codes concerning air for combus-
tion and ventilation, use the guidelines and procedures in
this section to install G61MPV furnaces to ensure efficient
and safe operation You must consider combustion air
needs and requirements for exhaust vents and gas piping
A portion of this information has been reprinted with per-
mission from the National Fuel Gas Code (ANSI-
Z223 1/NFPA 54) This reprinted material is not the com-
plete and official position of the ANSI on the referenced
subject, which is represented only by the standard in its en-
tirety
In Canada, refer to the standard CSA B149 installation
codes
Page 6
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