Step 3 - Field Fabricate Ductwork; Step 4 - Make Unit Duct Connections; Step 5 - Trap Condensate Drain - Carrier 50TJ016-028 Installation, Start-Up And Service Instructions Manual

Step 3 — Field Fabricate Ductwork —
ducts to building structure. Use flexible duct connectors be-
tween unit and ducts as required. Insulate and weatherproof all
external ductwork, joints, and roof openings with counter
flashing and mastic in accordance with applicable codes.
Ducts passing through an unconditioned space must be in-
sulated and covered with a vapor barrier.
The 50TJ units with electric heat require a 25 mm (1-in.)
clearance for the first 610 mm (24 in.) of ductwork.
Outlet grilles must not lie directly below unit discharge.
NOTE: A 90-degree elbow must be provided in the ductwork
to comply with UL (Underwriters' Laboratories) codes
(U.S.A. Standards) for use with electric heat.
For vertical supply and return units, tools or part could
drop into ductwork and cause an injury. Install a 90 degree
turn in the return ductwork between the unit and the condi-
tioned space. If a 90 degree elbow cannot be installed, then
a grille of sufficient strength and density should be installed
to prevent objects from falling into the conditioned space.
Due to electric heater, supply duct will require 90 degree
elbow.
NOTE: Do not drill in this area, as damage to basepan may result in
water leak.
Fig. 6 — Air Distribution — Through-the-Bottom
(50TJ024,028 Shown)
NOTE: Do not drill in this area, as damage to basepan may result in
water leak.
Fig. 7 — Concentric Duct Air Distribution
(50TJ024,028 Shown)
Step 4 — Make Unit Duct Connections —
Secure all
is shipped for through-the-bottom duct connections. Ductwork
openings are shown in Fig. 6. Field-fabricated concentric duct-
work may be connected as shown in Fig. 7 and 8. See Fig. 2
for horizontal adapter supply/return connections. Attach all
ductwork to roof curb and roof curb basepans. Refer to installa-
tion instructions shipped with accessory roof curb for more
information.
Step 5 — Trap Condensate Drain —
and 9 for drain location. Plug is provided in drain hole and
must be removed when unit is operating. One
provided inside unit evaporator section for condensate drain
connection. A 216-mm x 19-mm (8
nipple and a 51-mm x 19-mm (2-in. x
nipple are coupled to a standard 19-mm (
elbow to provide a straight path down through holes in unit
base rails (see Fig. 10). A trap at least 100 mm (4 in.) deep
must be used. If only one drain connection is trapped, other
connection must be plugged.
(1'-10 11/16") MAX.
(1'-0 3/16")
506
(1'-7 15/16")
310
(1'-0 3/16")
610
(24") MIN.
NOTES:
1. Dimension A, A' and B, B' are obtained from field-supplied ceiling
diffuser.
2. Dimensions are in millimeters.
NOTE: Dimensions are in millimeters.
8
1
/
1757
576
(5'-9 3/16") MAX.
310
1392
(4'-6 13/16")
B'
A'
BAFFLE
Shaded area indicates block-off panels.
Fig. 8 — Concentric Duct Details
19 (3/4") FPT DRAIN
19 FPT DRAIN
CONNECTION
CONNECTION
Fig. 9 — Condensate Drain Details
Unit
See Fig. 4, 5,
3
/ -in. FPT is
4
3
-in. x / -in.) diameter
2 4
3
/ -in.) diameter pipe
4
3
/ -in.) diameter
4
1890
(6'-2 3/8") MAX.
132
(5 3/16")
B
A
35 (1-3/8")
DRAIN HOLE