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whl-648 Rev. 000 Rel. 003 Date 3.6.18
11
C. Clearances for Service Access
The space must be provided with combustion / ventilation air
openings correctly sized for all other appliances located in the same
space as the appliance. The appliance cover must be securely fastened
to prevent the appliance from drawing air from the appliance room.
This is particularly important if the appliance is in a room with other
appliances. Failure to comply with the above warnings could result
in substantial property damage, severe personal injury, or death.
See Table 5 for recommended service clearances. If these minimum
clearances are not provided, it may not be possible to service the
appliance without removing it from the space.
Minimum Clearances
Installation Clearances from Non-
Combustibles / Combustibles
Recommended Service
and Proper Operation
Clearances
Top 18” (45.7 cm)
Back 0” (0 cm)
Bottom (Wall Mount Model) 12” (30.45 cm)
Bottom (Floor Model) 0” (0 cm)
Front 24” (60.9 cm)
Right or Left Side (Wall Mount Model)
3” (7.6 cm)
*Side without Adapters (Floor Model)
*Adapter Side (Floor Model) 24” (60.96 cm)
Table 6 - Minimum Installation and Service Clearances - *NOTE: The piping
conguration of the Floor Model can be changed from the left to the right side
of the appliance.
NOTE: For closet installations, a combustible door or removable
panel is acceptable front clearance. A 3” minimum clearance must be
provided from the appliance front cover to the removable panel or
combustible door.
NOTE: If you do not provide the minimum clearances shown in Table
5 it might not be possible to service the appliance without removing
it from the space.
All appliances eventually leak. It is recommended to install a catch
pan beneath the appliance. This catch pan should be sized with a
maximum depth of 2”, and a minimum diameter 2” greater than
the diameter of the appliance. The catch pan should empty into
an open drain line. This drain line should be 3/4” ID minimum,
piped to an open drain. Failure to follow these instructions could
result in property damage. Such damages ARE NOT covered by
product warranty.
MINIMUM CLEARANCES FROM COMBUSTIBLE MATERIALS
tHot water pipes - at least 1” from combustible materials
tExhaust vent pipe - at least 1” from combustible materials
Always take future maintenance into consideration when
locating the appliance. If the appliance is located in an installation
location with limited clearances, it may be necessary to remove
the appliance from the space to perform maintenance. Failure
to consider maintenance when determining installation location
could result in property damage.
D. Residential Garage and Closet Installations
Precautions
If the appliance is located in a residential garage, per ANSI Z223.1:
tMount the bottom of the appliance a minimum of 18” above
the oor of the garage to ensure the burner and ignition
devices are well o the oor.
tLocate or protect the appliance so it cannot be damaged by
a moving vehicle.
Check with your local Authority Having Jurisdiction for
requirements when installing the appliance in a garage or closet.
Please read the entire manual before attempting installation.
Failure to properly take factors such as venting, piping, condensate
removal, and wiring into account before installation could result
in wasted time, money, and possible property damage and
personal injury.
The space must be provided with correctly sized combustion/
ventilation air openings for all other appliances located in the
space with the appliance. For power venting installations using
room air for combustion, refer to the venting section, this manual,
for descriptions of conned and unconned spaces. Do not install
the appliance in an attic. Failure to comply with these warnings
could result in substantial property damage, severe personal
injury, or death.
E. Exhaust Vent and Intake Pipe
The appliance is rated Category IV (pressurized vent, likely to form
condensate in the vent) and requires a special vent system designed
for pressurized venting.
NOTE: The venting options described here (and further detailed
in the Venting section, this manual) are the lone venting options
approved for this appliance. Failure to vent the appliance in
accordance with the provided venting instructions will void the
warranty.
Failure to vent the appliance properly will result in serious personal
injury or death.
Do not attempt to vent this appliance by any means other than
those described in this manual. Doing so will void the warranty
and may result in severe personal injury or death.
Correct Installation
Incorrect Installation
Figure 1 - Leveled Appliance (Floor Model)
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