LP-179 Rev. 6.7.16
8
Figure 1 - Catch Pan Dimensions and Recommended Service
Clearances
C. Clearances for Service Access
All water heaters eventually leak. It is recommended to install
a catch pan beneath the water heater. This catch pan should be
sized with a maximum depth of 2”, and a minimum diameter 2”
greater than the diameter of the water heater. 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.
NOTE: In addition, on PHM models, it is recommended to
provide a minimum service clearance of 6” from the top of the
water heater to allow for piping of the top ports. Depending
on the installation, this clearance may need to be substantially
greater than 6”.
NOTE: If you do not provide the minimum clearances shown in
Figure 1 it might not be possible to service the heater without
removing it from the space.
The space must be provided with combustion / ventilation air
openings correctly sized for all other appliances located in the
same space as the heater. The heater cover must be securely
fastened to prevent the heater from drawing air from the
heater room. This is particularly important if the heater 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.
E. Exhaust Vent and Intake Pipe
The heater is rated ANSI Z21.10.3 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 water heater. Failure
to vent the water heater in accordance with the provided
venting instructions will void the warranty.
The exhaust discharged by this water heater may be very hot.
Avoid touching or other direct contact with the exhaust gases
of the vent termination assembly. Doing so could result in
severe personal injury or death.
Do not attempt to vent this water heater 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.
Vents must be properly supported. Heater exhaust and
intake connections are not designed to carry heavy weight.
Vent support brackets must be within 1’ of the heater and
the balance at 4’ intervals. Heater must be readily accessible
for visual inspection for rst 3’ from the water heater. Failure
to properly support vents could result in property damage,
severe personal injury, or death.
Failure to vent the water heater properly will result in serious
personal injury or death.
D. Residential Garage and Closet Installations
Precautions
If the heater is located in a residential garage, per ANSI Z223.1:
• Install the water heater burner and ignition devices a
minimum of 18” above the oor of the garage. This will
ensure the burner and ignition devices are well o the
oor.
• When raising the water heater ensure the entire
bottom and fully lled weight of the water heater are
fully supported.
• Locate or protect the water heater so it cannot be
damaged by a moving vehicle.
Check with your local Authority Having Jurisdiction for
requirements when installing the water heater 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 water heater. 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 water heater in an attic. Failure
to comply with these warnings could result in substantial
property damage, severe personal injury, or death.
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