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WARNING
FLAMMABLE ITEMS, PRESSURIZED CONTAINERS OR ANY
OTHER POTENTIAL FIRE HAZARDOUS ARTICLES MUST NEVER
BE PLACED ON OR ADJACENT TO THE HEATER. OPEN
CONTAINERS OF FLAMMABLE MATERIAL SHOULD NOT BE
STORED OR USED IN THE SAME ROOM WITH THE HEATER.
Water heater life depends upon water quality, water pressure and
the environment in which the water heater is installed. Water
heaters are sometimes installed in locations where leakage may
result in property damage, even with the use of a drain pan piped
to a drain. However, unanticipated damage can be reduced or
prevented by a leak detector or water shutoff device used in
conjunction with a piped drain pan. These devices are available
from some plumbing supply wholesalers and retailers, and detect
and react to leakage in various ways:
• Sensors mounted in the drain pan that trigger an alarm or turn
off the incoming water to the water heater when leakage is
detected.
• Sensors mounted in the drain pan that turn off the water supply
to the entire home when water is detected in the drain pan.
• Water supply shutoff devices that activate based on the water
pressure differential between the cold water and hot water
pipes connected to the water heater.
• Devices that will turn off the gas supply to a gas water heater
while at the same time shutting off its water supply.
PROVIDE UNIT SUPPORT
Before locating the unit on the roof, make sure the strength of the
roof and beams are adequate at that point to support the weight of
the unit full of water. (Full weight of approximately 1300 lbs. Add
extra load and safety factors.) This is very important and the user's
responsibility, see Figure 29. If you are uncertain as to the load
bearing capability of the roof, consult a licensed structural
engineering expert.
The unit should be placed on a solid level roof curb of adequate
strength. A properly designed roof curb is provided through
State Order Entry.
IMPORTANT: THE WATER HEATER SHOULD BE EMPTY OF WATER
DURING LIFTING. MAKE SURE ALL FASTENERS ON THE BASE OF
THE UNIT ARE IN PLACE DURING LIFTING.
The location of the unit on the roof should be such that exhaust
gas is not located near any air intakes or ventilation ducts.
Provide a minimum of 36" on each side of the unit for servicing.
Plumbing connections for water are made from inside the building.
Gas and electric connections are made from the rooftop. Remote
control wiring passes through the leak-tight fitting in the base of
the unit.
ROOF CURB
Assemble and install accessory roof curb in accordance with
instructions shipped with curb.
IMPORTANT: THE GASKETING OF THE UNIT TO THE ROOF CURB
IS CRITICAL FOR A WATER TIGHT SEAL. INSTALL GASKET
SUPPLIED WITH THE ROOF CURB AS SHOWN IN FIGURE 30.
Curb should be level. Refer to Accessory Roof Curb Installation
Instructions for additional information as required.
FIGURE 29