February 25, 2016
7062-196B
13
Explorer I
Negative pressure results from the imbalance of air avail-
able 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 heaters
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
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.
K. Negative Pressure
L. Frequently Asked Questions
ISSUES
SOLUTIONS
Odor from appliance
When fi rst operated, this appliance may release an odor for the fi rst 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.
