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14
Condensate Trap T
ubing
NOTE: See Fig. 14 or tube routing label on main furnace door
to check for proper connections.
1. Collector Box DrainTube
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--suppled 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
recommendations and procedures.
Condenste Trap Field Drain
Attachment
Refer to Condensate Drain section for recommendations and
procedures.
Pressure Switch T
ubing
One collector box pressure tube (pink label) is factory connected
to the pressure switch for use when furnace is installed i n
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 connect 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--suppled 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--suppled in
loose parts bag) to extend collector box pressure tube
(pink label) which was previously connected to pressure
switch.
5. Route this extende tube (pink label) to condensate trap
relief port connection.
6. Determine appropriate lenght, cut, and connect tube.
7. Clamp tube to relief port connection.
Condensate Trap Freeze Pr
otection
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 OPERATION HAZARD
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. (304.8mm) minimum offset pipe section is
recommended with short (5 to 8 ft or 1.5 m to 2.4 m) vent
systems. This recommendation is to reduce excessive condensate
droplets from exiting the vent pipe. (See Fig. 12, 13, or 44.)
LOCATION
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 T able 7.
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 and forward within 1/2--in. (12.7mm) for
proper furnace operation. For horizontal applications pitch
1/4-- in. (6mm) minimum to 1/2--in. (12.7mm) 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.
355CAV