Rheem 136-1826, Operating And Installation Manual, Page: 14 / 55

MODELS 962 - 1826
Locate and assemble as shown below. Secure with screws supplied in envelope in carton.
Fig. #8265.0
WARNING:
Indoor heaters require a drafthood that must be connected to a vent pipe and properly vented to the outside.
Failure to follow this procedure can cause fire or fatal carbon monoxide poisoning.
Vent piping the same size or larger than the draft hood outlet is recommended, however, when the total vent height
is at least ten (10) feet (draft hood relief opening to vent terminal), the vent pipe size may be reduced as specified
in Chapter 10 of the National Fuel Gas Code, ANSI Z223.1. As much as possible avoid long horizontal runs of vent
pipe and too many elbows. If installation requires horizontal non-vertical runs, the vent pipe must have a minimum
of 1/4 inch per foot rise and should be supported at not less than five foot intervals. Plumbers tape, criss-crossed,
will serve to space both horizontal and vertical piping. Gas vents supported only by the flashing and extending above
the roof more than five feet should be securely guyed or braced to withstand snow and wind load. We recommend
use of insulated vent pipe must terminate with a vent cap which complies with the local codes or, in the absence of
such codes, to the latest edition of the National Fuel Gas Code,
ANSI Z223.1.
The discharge opening must be a minimum of three feet
vertically from the roof surface and at least two feet higher than any
part of the building within ten feet. Vent stack shall be at least five
feet in vertical height above the drafthood outlet. The vent cap
location shall have a minimum clearance of 4 feet horizontally from,
and in no case above or below, unless a 4-foot horizontal distance
is maintained, from electric meters, gas meters regulators and relief
equipment.
The weight of the vent stack or chimney must not rest on the
heater draft hood. Support must be provided in compliance with
applicable codes. The heater top and draft hood must be readily
removable for maintenance and inspection. Vent pipe should be
adequately supported to maintain proper clearances from combus-
tible construction.
Type "B" double wall or equivalent vent pipe is recommended.
However single wall metal vent pipe may be used as specified in the
latest edition of the National Flue Gas Code
ANSI Z223.1.
5' MIN
2' MIN
10' OR LESS
2' MIN
VENT CAP
VENT PIPE
DRAFT HOOD
HEATER
Fig # 8119
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