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Table 3 — Fitting Requirement (cont)
UNIT ACCESS HOLE NO.
]
CONNECTION TYPE CIRCUIT FITTINGS REQUIRED
†
(in.)
524J*30A
1 Suction Lower
1
3
/
8
Street Elbow
1
3
/
8
Nipple, 3 L
1
3
/
8
Long Radius Elbow
2 Liquid Lower
5
/
8
Street Elbow
5
/
8
Nipple, 7
3
/
4
L
5
/
8
Long Radius Elbow
3 Liquid Upper
5
/
8
Street Elbow
5
/
8
Nipple, 18
1
/
2
L
5
/
8
Long Radius Elbow
4 Suction Upper
1
3
/
8
Nipple, 4
3
/
16
L
1
3
/
8
Long Radius Elbow
1
3
/
8
Nipple, 19
1
/
4
L
1
3
/
8
Long Radius Elbow
]
See Fig. 8 for access hole location by number.
† Fittings are listed in order from header or tee stub connection out to access hole in corner support post.
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.
3” MIN.
[76]
NOTE: Dimensions in [ ] are in millimeters
C10691
Fig. 12 -- 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. 13 -- 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. 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 connection, 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
toward the drain connection.
524J