Carrier 48PD05 - Page 10

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HEAT EXCHANGER
SECTION
Step 6 -- Install External Trap for Condensate
Drain
Fig. 6 - Typical Gas Heating Section
The unit's 3/4-in. condensate drain connections are located on the
bottom and side of the unit. Unit discharge connections do not
determine the use of drain connections; either drain connection can
be used with vertical or horizontal applications. See Fig. 2 for
locations.
When using the standard side drain connection, make sure the plug
(red) in the alternate bottom connection is tight before installing the
unit. (See Fig. 7.)
To use the bottom drain connection for a roof curb installation,
relocate the factory-installed plug (red) from the bottom
INDUCED connection to the side connection. A 1/2-in. socket extension can
/DRAFT be used to remove the plug. (See Fig. 7.) The piping for the
MOTOR
condensate drain and external trapcan be completed after the unit
-COMBUSTION is in place.
FANHOUSING All units must have an external trap for condensate drainage. Install
a trap at least 4-in. deep and protect against freeze-up. If drain line
is installed downstream from the external trap, pitch the line away
from the unit at 1-in. per 10 fl of run. Do not use a pipe size
MAIN GAS
/ VALVE smaller than the unit connection (3/4-in.). (See Fig. 8 and 9.)
'\,' The 48PD units are provided with a removable condensate pan for
MAINBURNERSECTION ease of cleaning. Refer to Maintenance section in Controls and
c06258 Troubleshooting book for more information. It is recommended
that a union be placed between the unit and condensate drainage to
ease the removal of the pan during servicing. Adequate clearance
should be allowed if removal of condensate pan is required. Allow
54-in. between condensate pan access panel and any obstruction
for complete removal.
BOTTOM DRAIN
PLUG
SIDE DRAIN
PLUG
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C06233
Fig. 7 - Condensate Drain Pan
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