Carrier 58MTB Installation, Start-Up, And Operating Instructions Manual page 13

COMBUSTION–AIR
MANUAL
SHUTOFF
GAS VALVE
→
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.
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.
A 3-IN. MINIMUM CLEARANCE
TO COMBUSTION-AIR INTAKE
IS REQUIRED.
INTAKE
"
3
5 ⁄
4
SEDIMENT
TRAP
CONDENSATE
TRAP
NOTE: LOCAL CODES MAY REQUIRE A DRAIN PAN UNDER THE
FURNACE AND CONDENSATE TRAP WHEN A CONDENSING
FURNACE IS INSTALLED ABOVE FINISHED CEILINGS.
Fig. 12—Attic Location and Working Platform for Non-Direct
Vent (1-pipe) Applications
VENT
30-IN. MIN
WORK AREA
ACCESS OPENING
FOR TRAP
DRAIN
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 recommenda-
tions and procedures.
CONSTRUCT A WORKING PLATFORM
Construct working platform where all required furnace clearances
are met. (See Fig. 3 and 11 or 12.)
13
A 12-IN. MIN HORIZONTAL PIPE
SECTION IS RECOMMENDED WITH
SHORT (5 TO 8 FT) VENT SYSTEMS
TO REDUCE EXCESSIVE
CONDENSATE DROPLETS FROM
EXITING THE VENT PIPE.
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