Bryant 351DAS, Installation, Start-Up & Operating Instructions

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3. Refer to Condensate Drain Protection section for recom-
mendations and procedures when condensate trap maybe
exposed to freezing temperatures.
LOCATION
I. GENERAL
Return-air plenum is not required when this direct vent furnace is
installed in a dedicated confined space or installed in a space with
other direct vent appliances. (Manufactured Home Construction
and Safety Standards, Title 24 CFR, Part 3280.709.e.1).
When the furnace is installed in a space containing other non-
direct vent appliances, the return air must be handled by ducts and
sealed to furnace casing. The ducts terminate outside the space
containing the furnace to ensure there will not be a negative
pressure condition within equipment room or space. Furnace may
be located in a confined space without special provisions for
dilution or ventilation air. This furnace must be installed so
electrical components are protected from water.
Locate furnace as close to center of air distribution system as
possible.
Locate furnace so combustion-air and vent pipe maximum lengths
are not exceeded. Refer to Table 7.
Fig. 7—Furnace Support for Servicing Air
Conditioning Coil
A99007
FURNACE
FIELD-SUPPLIED
SUPPORTS
(1 X 4 OR 2 X 4
3 PLACES)
NOTE:
For proper furnace operation, install furnace so that it is
level or pitched forward within 1/2 in. to ensure proper condensate
drainage from secondary heat exchangers.
A99019
FRONT
LEVEL (0
″
)
TO
1 ⁄
2
″
MAX
NOTE: These furnaces are designed for a minimum continuous
return-air temperature of 60°F or intermittent operation down to 55°F
such as when used with a night setback thermostat. Return-air
temperature must not exceed a maximum of 85°F. Failure to follow
these return-air temperature limits may affect reliability of heat
exchangers, motors, and controls.
A99020
FRONT
RETURN AIR
MAX 85
°
F MIN 55
°
F
°
F
°
F
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