15
VENT
MANUAL
SHUTOFF
GAS VALVE
SEDIMENT
TRAP
CONDENSATE
TRAP
DRAIN
ACCESS OPENING
FOR TRAP
3
0
-IN. (7
6
2mm) MIN
WORK AREA
A 12-IN. (3
0
5mm) MIN HORIZONTAL PIPE
SECTION IS RECOMMENDED WITH
SHORT (5 TO 8 FT / 1.5 TO 2.4M) VENT
SYSTEMS TO REDUCE EXCESSIVE
CONDENSATE DROPLETS FROM
EXITING THE VENT PIPE.
A 3-IN.(7
6
mm) MINIMUM CLEARANCE
TO COMBUSTION-AIR INTAKE
IS REQUIRED.
5
3
/
4
IN. (14
6
mm)
NOTE:
LOCAL CODES MAY REQUIRE A DRAIN PAN UNDER THE
FURNACE AND CONDENSATE TRAP WHEN A CONDENSING
FURNACE IS INSTALLED ABOVE FINISHED CEILINGS.
COMBUSTION AIR
INTAKE
A96184
Fig. 12 --
Attic Location and Working Platform for Non-Direct Vent (1-pipe) Applications
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.
PRESSURE SWITCH TUBING
One collector box pressure tube (pink label) is factory connected
to the High Pressure Switch for use when furnace is installed in
UPFLOW 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 High Pressure Switch in DOWNFLOW or HORIZONTAL
RIGHT applications.
NOTE
: See Fig. 12 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 High 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 High
Pressure Switch connection labeled COLLECTOR BOX.
4. Use remaining smaller diameter tube (factory-supplied in
loose parts bag) to extend collector box pressure tube
(pink label) which was previously connected to High
Pressure Switch. Route this extended tube (pink label) to
condensate trap relief port connection.
5. Determine appropriate length, cut, and connect tube.
6. 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 11 or 12.)
58MEC
