Carrier 40RU User Manual

Page 18

Condensate Drain — Install a trapped condensate drain

line to unit connection as shown in Fig. 13. The unit drain

connection is a PVC stub. See Fig. 14. Some areas may

require an adapter to connect to either galvanized steel or

copper

pipe.

For

these

applications,

install

field--supplied threaded PVC adapter.

3” MIN.

[76]

NOTE: Dimensions in [ ] are in millimeters

C10691

Fig. 13 -- Condensate Drains

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

drainage. 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.

C10692

Fig. 14 -- Drain Pan Slope Adjustment

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 connection. See Fig. 14. 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. Re--tighten screws. The pan

should have a pitch of at least

--in. over its length

toward the drain connection.

Fan Motor and Drives -- Motor and drive packages are

factory installed in all units. The motor and drive

packages consist of the following items:

1 — fan motor

1 — adjustable motor pulley

1 — fan pulley

1 — fan belt

(40RUA*07--12, 40RUQ*07--12, 40RUS*08--12 units)

2 — matched fan belts

(40RUA*14--16, 40RUQ*16, 40RUS*14--16 units)

For instructions on changing fan rotation, changing drive

speeds and adjusting drives, see Pulley and Drive

Adjustment in the Service section.

40RU