Carrier 40RMQ - Manual (Page 18)

Condensate Drain — Install a trapped condensate drain
line to unit connection as shown in Fig. 10. The unit drain
connection is a PVC stub. See Fig. 11. Some areas may re-
quire an adapter to connect to either galvanized steel or
copper pipe. For these applications, install a field-supplied
threaded PVC adapter.
NOTE: A trap must be installed in the condensate drain line
to ensure that the static pressure of fans is balanced with the
water column in the drain line and that condensate can drain
completely from pan. Without a trap, air can be drawn up
drain line until water level in condensate pan becomes equal
to static pressure created by fans, preventing complete drain-
age. Conditions will worsen as filters become dirty.
Install clean-out plugs in trap. Pitch drain line downward
to an open floor drain or sump. Provide service clearance
around drain line to permit removal of unit panels. Observe
all local sanitary codes.
As shipped, the unit’s condensate drain pan is NOT sloped
towards the drain connection. The pan slope must be changed
to pitch towards the side of the unit with the drain con-
nection. See Fig. 11. Loosen the 2 screws next to the drain
outlet at both ends of the unit, push drain pan down in
the slots near the drain connection, and up in the slots
on the opposite end. Retighten screws. The pan should
have a pitch of at least
1 ⁄
4
-in. over its length toward the drain
connection.
Fan Motors and Drives — Motor and drive pack-
ages are factory installed in all units. The standard motor
and drive packages consist of the following items:
1 — fan motor
1 — adjustable motor pulley
1 — fan pulley
1 — fan belt (40RM007-016, 40RMQ008-016, 40RMS
008-016 units)
2 —matched fan belts (40RM024-034, 40RMS024-034
units)
For instructions on changing fan rotation, changing drive
speeds and adjusting drives, see Pulley and Drive Adjust-
ment in the Service section.
NOTE: Dimensions in [ ] are in millimeters.
Fig. 10 — Condensate Drains
Fig. 11 — Drain Pan Slope Adjustment
18