lp-441 Rev. 004 Rel. 000 Date 7.2.21
10
Figure 1 - Drain Pan Dimensions and Recommended Service Clearances
NOTE:
In addition, it is recommended to provide a minimum service
clearance of 6” from the top of the water heater to allow for piping of
the T&P relief valve and 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.
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 mini-
mum of 18” above the floor of the garage. This will ensure
the burner and ignition devices are well off the floor.
• When raising the water heater ensure the entire bottom and
fully filled 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.
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.
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 first 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.
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 confined and unconfined 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.
Appliance Area Ventilation Air Openings - Closet Installations
If the appliance is installed in a closet or alcove the appliance area/
room must be ventilated.
EXCEPTION:
If the appliance area/room has a volume of 150 ft
3
or gre-
ater, ventilation of the appliance area/room is not required.
Each ventilation air opening must meet the minimum requirements
of 1 in
2
per 1000 BTU/hr., but not less than 100 in
2
. The lower ventila-
tion opening must be located within 6 in. of the floor, while the upper
opening must be located 6 in. from the top of the space.
WARNING
!
If the appliance area has a volume less than 150 ft
3
, it is considered a
Closet or Alcove. In the US/Canada, PVC vent pipe and fittings SHALL
NOT BE USED within the closet or alcove. Only approved CPVC,
Polypropylene, or Stainless Steel vent pipe and fittings may be used.
See Table 6 for a list of approved materials. Under all circumstances
proper ventilation must be provided.
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 appliance venting section, this manual, for
descriptions of confined and unconfined spaces. Do not install the
appliance in an attic. 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.
Alcove Installations
Alcove installations have the same minimum dimensions as closet
installations, except the installation must be completely open to the
room at a distance no greater than 18 in. (457 mm) from the front
of the appliance and the room must be at least three (3) times the
size of the alcove. Provided these conditions are met, the appliance
requires no extra ventilation air openings to the space. If these con-
ditions are not met, follow the requirements for Closet Installations.
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.