Step 5 - Rig And Place Unit; Positioning On Curb; Step 6 - Field Fabricate Ductwork; Step 7 - Horizontal Duct Connection - Carrier WeatherMaker 50TC Series Installation Instructions Manual

"B"
MAX WEIGHT
UNIT
LB
50TC-*18 2212
50TC-*21 2422
50TC-*25 2572
50TC-*29 2621
NOTES:
1. Dimensions in ( ) are in millimeters.
2. Hook rigging shackles through holes in base rail, as shown in detail "A." Holes in base rails are centered around the unit center of gravity. Use
wooden top skid, when rigging, to prevent rigging straps from damaging the unit.
Step 5 — Rig and Place Unit
Keep unit upright and do not drop. Spreader bars are not required
if top crating is left on the unit. Rollers may be used to move unit
across a roof. Level by using unit frame as a reference. See Table 2
and Fig. 19 for additional information.
Lifting holes are provided in base rails as shown in Fig. 19. Refer
to rigging instructions on the unit.
CAUTION
UNIT DAMAGE HAZARD
Failure to follow this caution may result in equipment damage.
All panels must be in place when rigging. Unit is not designed
for handling by fork truck when packaging is removed.
If using top crate as spreader bar, once unit is set, carefully
lower wooden crate off building roof top to ground. Ensure
that no people or obstructions are below prior to lowering the
crate.
Although the unit is weatherproof, guard against water from high-
er level runoff and overhangs.
After the unit is in position, remove rigging skids and shipping
materials.

POSITIONING ON CURB

Position unit on roof curb so that the following clearances are
maintained: 1 / -in. (6 mm) clearance between the roof curb and the
4
base rail inside the right and left,
tween the roof curb and the base rail inside the front and back.
This will result in the distance between the roof curb and the base
rail being approximately equal to Details A and B in Fig. 16-18.
(914-1371)
36"-54"
SEE DETAIL A
"C"
"A"
A
KG in.
1003 127.8
1099 141.5
1167 141.5
1189 157.8
Fig. 19 — Rigging Details
1 / -in. (12 mm) clearance be-
2
DUCT END
DIMENSIONS
B
mm in.
3249 58.7
3595 71.5
3595 71.5
4007 80.3
Step 6 — Field Fabricate Ductwork
Cabinet return-air static pressure (a negative condition) shall not
exceed 0.5 in. wg (87 Pa) with economizer or without economizer.
Fabricate supply ductwork so that the cross sectional dimensions
are equal to or greater than the unit supply duct opening dimen-
sions for the first 18-in. (458 mm) of duct length from the unit duct
openings.
Insulate and weatherproof all external ductwork, joints, and roof
openings with counter flashing and mastic in accordance with ap-
plicable codes.
Ducts passing through unconditioned spaces must be insulated
and covered with a vapor barrier.
PROPERTY DAMAGE HAZARD
Failure to follow this caution may result in damage to roofing
materials.
Membrane roofs can be cut by sharp sheet metal edges. Be
careful when placing any sheet metal parts on such roof.
For units with optional or accessory electric heaters: Minimum
clearance is not required around ductwork.
Step 7 — Horizontal Duct Connection
Refer to Fig. 2-13 for locations and sizes of the horizontal duct
connections. Note that there are two different return air duct con-
nection locations – one for unit without an economizer (on back
side of unit) and a different one for unit equipped with an econo-
mizer (on left end, under the economizer hood). The supply air
duct connection is on the back side. See Fig. 20 for top view de-
picting typical horizontal duct arrangements.
21
DETAIL A
C
mm in.
1491 52.3
1816 52.3
1816 60.3
2040 60.3
CAUTION
mm
1328
1328
1532
1532