20
Fig. 11 — Typical 40RUS Chilled Water Piping
Condensate Drain
Install a trapped condensate drain line to unit connection as shown
in Fig. 12
.
The unit drain connection is a PVC stub. (See Fig. 13.)
Some areas may require 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 en
-
sure that the static pressure of fans is balanced with the water col
-
umn 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.
As shipped, the unit’s condensate drain pan is NOT sloped to
-
wards the drain connection. The pan slope must be changed to
pitch towards the side of the unit with the drain connection. (See
Fig. 13.) 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 connec
-
tion, and up in the slots on the opposite end. Re-tighten screws.
The pan should have a pitch of at least 1/4 in. over its length to
-
ward the drain connection.
Fig. 12 — Condensate Drain
3” MIN.
[76]
NOTE: Dimensions in [ ] are in millimeters
