Bryant Bruant 4 Way Gas 355AAV - Manual (Page 15)

15
1. Collector Box Drain Tube
a. Remove factory--installed plug from LOWER collector
box drain tube (blue and white striped label).
b. Install removed clamp and plug into UPPER collector
box drain tube (blue label) which was previously
connected to condensate trap.
c. Connect LOWER collector box drain tube (blue and
white striped label) to condensate trap. Tube does not
need to be cut.
d. Clamp tube to prevent any condensate leakage.
2. Inducer Housing Drain Tube
a. Remove factory--installed cap and clamp from LOWER
inducer housing drain connection.
b. Remove and discard UPPER (molded) inducer housing
drain tube which was previously connected to
condensate trap.
c. Install cap and clamp on UPPER inducer housing drain
connection where molded drain tube was removed.
d. Use inducer housing drain extension tube (violet label
and factory--supplied in loose parts bag) to connect
LOWER inducer housing drain connection to
condensate trap.
e. Determine appropriate length, cut, and connect tube to
condensate trap.
f. Clamp tube to prevent any condensate leakage.
3. Relief Port Tube
Refer to Pressure Switch Tubing section for connection procedure.
Condensate Trap Field Drain Attachment
Refer to Condensate Drain section for recommendations and
procedures.
UPFLOW OR DOWNFLOW HORIZONTAL
FRONT
LEVEL 0 ″
TO
1 ⁄
2
″ MAX
MIN 1 ⁄
4
″
TO
1 ⁄
2
″ MAX
FRONT
(0 to 13 mm)
(6 to 13 mm)
A02146
Fig. 15 -- Proper Condensate Drainage
Pressure Switch Tubing
One collector box pressure tube (pink label) is factory connected to
the pressure switch for use when furnace is installed in UPFLOW
or HORIZONTAL LEFT applications. This tube MUST be
disconnected and used for the condensate trap relief port tube. The
other collector box pressure tube (green label) which was factory
connected to the condensate trap relief port connection MUST be
connected to the pressure switch in DOWNFLOW or
HORIZONTAL RIGHT applications.
NOTE: See Fig. 14 or tube routing label on main furnace door to
check for proper connections.
Relocate tubes as described below.
1. Disconnect collector box pressure tube (pink label) attached
to pressure switch.
2. Extend collector box pressure tube (green label) which was
previously connected to condensate trap relief port
connection
by splicing to small diameter tube
(factory--supplied in loose parts bag).
3. Connect collector box pressure tube (green label) to
pressure switch connection labeled COLLECTOR BOX.
4. Use remaining small diameter tube (factory--supplied in
loose parts bag) to extend collector box pressure tube (pink
label) which was previously connected to pressure switch.
5. Route this extended tube (pink label) to condensate trap
relief port connection.
6. Determine appropriate length, cut, and connect tube.
7. Clamp tube to relief port connection.
Condensate Trap Freeze Protection
Refer to Condensate Drain Protection section for recommendations
and procedures.
Construct a Working Platform
Construct working platform where all required furnace clearances
are met. (See Fig. 3 and 12 or 13.)
UNIT MAY NOT OPERATE
Failure to follow this caution may result in intermittent unit
operation.
The condensate trap MUST be installed below furnace. See
Fig. 6 for dimensions. The drain connection to condensate trap
must also be properly sloped to an open drain.
CAUTION
!
NOTE: A 12--in. (305 mm) minimum offset pipe section is
recommended with short (5 to 8 ft./ 1.5 -- 2.4 M) vent systems.
This recommendation is to reduce excessive condensate droplets
from exiting the vent pipe. (See Fig. 12, 13 or 42.)
LOCATION
Step 1 — General
This furnace must
S be installed so the electrical components are protected from
water.
S not be installed directly on any combustible material other than
wood flooring (refer to SAFETY CONSIDERATIONS).
S be located so combustion--air and vent pipe maximum lengths
are not exceeded. Refer to Table 11.
S be located where available electric power and gas supplies meet
specifications on the furnace rating plate.
S be attached to an air distribution system and be located as close
to the center of the distribution system as possible. Refer to Air
Ducts section.
S be provided with ample space for servicing and cleaning.
Always comply with minimum fire protection clearances shown
on the furnace clearance--to--combustibles label. (See Fig. 3.)
This furnace may be located in a confined space without special
provisions for dilution or ventilation air.
NOTE: For upflow/downflow applications install furnace so that
it is level or pitched forward within 1/2--in. (13 mm) for proper
furnace operation. For horizontal applications pitch 1/4--in. (6
mm) minimum to 1/2--in. (13 mm) maximum forward to ensure
proper condensate drainage from secondary heat exchangers. (See
Fig. 15.)
When a furnace is installed so that supply ducts carry air circulated
by the furnace to areas outside the space containing the furnace, the
return air shall also be handled by ducts 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.
355A