Rheem 136-1826 - Manual (Page 16)

POWER VENTING
Heaters may be connected to systems requiring mechanical draft exhaust fans. The installation must be
engineered by competent personnel in accordance with the latest edition of ANSI Z 223.1, local codes and with the
supplier of the fan.
Particular attention must be given to the type of vent pipe used, its size and location. Suitable interlocks must
be provided to prevent heater operation until the fan is operating as designed.
OUTDOOR WATER HEATERS
The point from where the flue products exit the heater must be a minimum of four (4) feet below, four (4) feet
horizontally from or one (1) foot above any door, window or gravity inlet to a building. The top surface of the heater
shall be at least three (3) feet above any forced air inlet, or intake ducts located within ten (10) feet horizontally.
HIGH WIND CONDITIONS (Outdoor Units Only)
In areas where high winds are frequent, it may be necessary to locate the heater a minimum of 3' from high vertical
walls, or install a wind break so the heater is not in direct wind current.
Fig. #8245.1
Fig. # 8182.0
VENT DAMPER INSTALLATION
(MODELS 136 THROUGH 264)
WHERE REQUIRED
LOCATION
The vent damper must be located in the vent so that
it serves only the appliance for which it is intended.
If improperly installed, a hazardous condition, such
as an explosion or carbon monoxide poisoning, could
result. Make certain that it is mounted in an accessible
location at least 6 in. (152.4 mm) from any combustible
material or the heat exchanger and that the position
indicator is in a visible location.
The vent damper must be installed after the appliance
draft hood, as close to the draft hood as practicable, and
without modification of the draft hood.
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