Clearances For Service Access; Residential Garage Installation; Exhaust Vent And Intake Pipe; Direct Vent Of Exhaust And Intake - Westinghouse WGR-076 Series Installation, Start-Up, Maintenance, Parts, Warranty

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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.
Figure 1 - Catch 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.
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.
WHL-001 Rev. 3.16.15
D. Residential Garage Installation
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 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.
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.
Failure to vent the water heater properly will result in serious
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 first 3' from the water heater. Failure
to properly support vents could result in property damage,
severe personal injury, or death.
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.

1. Direct Vent of Exhaust and Intake

If installing a direct vent option, combustion air must be drawn
from the outdoors directly into the water heater intake and
exhaust must terminate outdoors. There are three basic direct
vent options detailed in this manual: 1. Side Wall Venting, 2.
Roof Venting, and 3. Unbalanced Venting.
Be sure to locate the heater such that the exhaust vent and
intake piping can be routed through the building and properly
terminated. Different vent terminals can be used to simplify
and eliminate multiple penetrations in the building structure
(see Optional Equipment in Venting Section). The exhaust
vent and intake piping lengths, routing, and termination
methods must all comply with the methods and limits given
in the Venting Section, this manual.
When installing a combustion air intake from outdoors, care
must be taken to utilize uncontaminated combustion air. To
prevent combustion air contamination, see Table 2.