Freeze Protection
When installing this heater in an outdoor location that
is susceptible to freezing, sales order option B-22
must be ordered. The B-22 option energizes the
heater pump at a preset temperature drop to circulate
water and reduces the possibility of freezing and dam-
aging the heat exchanger or headers.
Controls
NOTE:
Condensate can freeze on the vent cap.
Frozen condensate on the vent cap can result in a
blocked flue condition.
NOTE:
The vent cap, flow switch cover and air intake
hood must be furnished by the heater manufacturer
in accordance with its listing (sales order option
D-11).
WARNING:
Installation, adjustment and service of
heater controls, including timing of various operating
functions, must be performed by a qualified installer,
service agency or the gas supplier. Failure to do so
may result in control damage, heater malfunction,
property damage, personal injury, or death.
WARNING:
Turn off the power to the heater before
installation, adjustment or service of the CPW
board or any heater controls. Failure to do so may
result in board damage, heater malfunction, property
damage, personal injury, or death.
CAUTION:
This appliance has provisions to be
connected to more than one supply source. To
reduce the risk of electric shock, disconnect all such
connections before servicing.
CAUTION:
Risk of electric shock: More than one
disconnect switch may be required to de-energize
the equipment before servicing.
Use only the special gas vent pipes listed for use with
Category III gas burning heaters, such as the AL29-4C
stainless steel vents offered by Heat Fab Inc. (800-
772-0739), Protech System, Inc. (800-766-3473),
Z-Flex (800-654-5600) or American Metal Products
(800-423-4270). Pipe joints must be positively sealed.
Follow the vent manufacturer’s installation instructions
carefully.
Outdoor Installation
Outdoor models are self-venting when installed with
the optional factory-supplied outdoor vent kit and
re-quire no additional vent piping. A special vent cap,
flow switch cover and air intake hood are provided in
accordance with CSA requirements, which must be
installed directly on the heater. Correct clearances can
Care must be taken when locating the heater outdoors,
because the flue gases discharged from the vent cap
can condense as they leave the cap. Improper location
can result in damage to adjacent structures or building
finish. For maximum efficiency and safety, the follow-
ing precautions must be observed:
1. Outdoor models must be installed outdoors and
must use the outdoor vent cap, flow switch cover
and air intake hood available from the manu-
fac-turer (sales order option D-11).
2. Periodically check venting system. The heater’s
venting areas must never be obstructed in any
way and minimum clearances must be observed
to prevent restriction of combustion and ventilation
air. Keep area clear and free of combustible and
flammable materials.
3. Do not locate adjacent to any window, door
walk-way, or gravity air intake. The vent must be
located a minimum of 4 ft horizontally from such
areas.
4. Install above grade level and above normal snow
levels.
5. Vent terminal must be at least 3 ft above any
forced air inlet located within 10 ft.
6. Adjacent brick or masonry surfaces must be
pro-tected with a rust-resistant sheet metal plate.
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