16
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) at-
tached 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 pres-
sure 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 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. (305 mm) minimum offset pipe section is
recommended with short (5 to 8 ft. or 1.5M to 2.4M) 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 Table 7.
S
be located where available electric power and gas sup-
plies 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 pos-
sible. Refer to Air Ducts section.
S
be provided with ample space for servicing and clean-
ing. Always comply with minimum fire protection
clearances shown on the furnace clearance--to--com-
bustibles 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. (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.
FRONT
BACK
FRONT
B
A
C
K
A93043
Fig. 16 -- Prohibit Installation on Back
355C
A
V
