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15 04/237102-803E
Negative pressure results from the imbalance of air available
fortheappliancetooperateproperly.Itcanbestrongestin
lower levels of the house.
Causes include:
Exhaust fans (kitchen, bath, etc.).
Range hoods.
Combustion air requirements for furnaces, water
appliances and other combustion appliances
Clothes dryers.
• Locationofreturn-airventstofurnaceorairconditioning.
• ImbalancesoftheHVACairhandlingsystem
• Upperlevelairleakssuchas:
- Recessedlighting
- Attichatch
- Ductleaks
P. Frequently Asked Questions
O. Negative Pressure
Table 15.1
ISSUES SOLUTIONS
Odorfromappliance Whenrstoperated,thisappliancemayreleaseanodorfortherstseveralhours.Thisiscaused
bythecuringofthepaintandtheburningo󰀨ofanyoilsremainingfrommanufacturing.
Metallic noise
Noise is caused by metal expanding and contracting as it heats up and cools down, similar to the
soundproducedbyafurnaceorheatingduct.Thisnoisedoesnota󰀨ecttheoperationorlongevity
of the appliance.
Whirringsound Iftheblowerhasbeeninstalled,theblowerproducesawhirringsoundwhichincreasesinvolume
as the speed is increased.
CONTACT YOUR DEALER for additional information regarding operation and troubleshooting.
Visit www.vermontcastings.com to nd a dealer.
Asphyxiation Risk.
Negative pressure can cause spillage
of combustion fumes, soot and
carbon monoxide.
Appliance needs to draft properly for safety.
WARNING
To minimize the e󰀨ects of negative air pressure:
• Installtheoutsideairkitwiththeintakefacingprevailing
winds during the heating season
Ensure adequate outdoor air for all combustion
appliances and exhaust equipment
Ensure furnace and air conditioning return vents are not
located in the immediate vicinity of the appliance
Avoid installing the appliance near doors, walkways or
small isolated spaces
Recessed lighting should be a “sealed can” design
Attic hatches weather stripped or sealed
Attic mounted duct work and air handler joints and seams
taped or sealed
DoNOToperateacirculatingfanwithincloseproximity,
approximately4ft(1.2m),ofappliance:
Can reverse air ow, blowing hot air into
appliance cavity.
Can damage appliance blower due to overheating.
CAUTION
Fire Risk.
DO NOT BURN GARBAGE OR
FLAMMABLE FLUIDS SUCH AS
GASOLINE,NAPHTHAORENGINEOIL.
Do NOT burn treated wood or woodwith
salt (driftwood).
May generate carbon monoxide if burn material other
than wood.
May result in illness or possible death.
WARNING
Fire Risk.
Keep combustible materials, gasoline and
other ammable vapors and liquids clear
of appliance.
DoNOTstoreammablematerialsinthe
appliance’s vicinity.
DO NOT USE GASOLINE, LANTERN FUEL,
KEROSENE, CHARCOAL LIGHTER FLUID OR
SIMILARLIQUIDSTOSTARTOR“FRESHENUP”
AFIREINTHISAPPLIANCE.
Keep all such liquids well away from the appliance
while it is in use.
Combustible materials may ignite.
WARNING
15


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