15
7033-362C
11/21
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
K. Negative Pressure
ISSUES
SOLUTIONS
Odor from appliance
When first operated, this appliance may release an odor for the first several hours. This is
caused by the curing of the paint and the burning off 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 affect the operation or
longevity of the appliance.
Whirring sound
If the optional blower has been installed, the blower produces a whirring sound which
increases in volume as the speed is increased.
L. Frequently Asked Questions
To minimize the effects 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
WARNING
Asphyxiation Risk.
• Negative pressure can cause spillage
of combustion fumes, soot and
carbon monoxide.
• Appliance needs to draft properly
for safety.
WARNING
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.
Fire Risk.
Keep combustible materials, gasoline and
other flammable vapors and liquids clear of
appliance.
WARNING
•
Do NOT store flammable materials in the
appliance’s vicinity.
• DO NOT USE GASOLINE, LANTERN FUEL,
KEROSENE, CHARCOAL LIGHTER FLUID OR
SIMILAR LIQUIDS TO START OR “FRESHEN UP” A
FIRE IN THIS APPLIANCE.
• Keep all such liquids well away from the appliance
while it is in use.
•
Combustible materials may ignite.
CONTACT YOUR DEALER for additional information regarding operation and troubleshooting.
Visit
Table 15.1
