Carrier 40RMQ, 40RMS installation instructions Ð Condensate Drains, Ð Drain Pan Slope Adjustment

Condensate Drain Ð 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 ®eld-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 ®lters become dirty.

Install clean-out plugs in trap. Pitch drain line downward to an open ¯oor 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

NOTE: Dimensions in [ ] are in millimeters.

Fig. 10 Ð Condensate Drains

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 Ð Motor and drive pack- ages are factory installed in all units. The standard motor and drive packages consist of the following items:

1 Ð fan motor

1 Ð adjustable motor pulley

1 Ð fan pulley

1 Ð fan belt (40RM007-016, 40RMQ008-016, 40RMS 008-016 units)

2Ðmatched 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.

Fig. 11 Ð Drain Pan Slope Adjustment

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