Carrier WeatherMaker 50TC07 Series - Step 5 - Field Fabricate Ductwork; For Units with Accessory Electric Heaters; Step 6 - Rig and Place Unit

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Step 5 — Field Fabricate Ductwork
Cabinet return-air static pressure (a negative condition) shall
not exceed 0.35 in. wg (87 Pa) with economizer or 0.45 in. wg
(112 Pa) without economizer.
For vertical ducted applications, secure all ducts to roof curb
and building structure. Do not connect ductwork to unit.
Fabricate supply ductwork so that the cross sectional dimen-
sions are equal to or greater than the unit supply duct opening
dimensions for the first 18-in. (458 mm) of duct length from
the unit basepan.
Insulate and weatherproof all external ductwork, joints, and
roof openings with counter flashing and mastic in accordance
with applicable codes.
Ducts passing through unconditioned spaces must be insulated
and covered with a vapor barrier.
If a plenum return is used on a vertical unit, the return should
be ducted through the roof deck to comply with applicable fire
codes.
FOR UNITS WITH ACCESSORY ELECTRIC HEATERS
All installations require a minimum clearance to combustible
surfaces of 1-in. (25 mm) from duct for first 12-in. (305 mm)
away from unit.
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) code for use with
electric heat.
Step 6 — Rig and Place Unit
Keep unit upright and do not drop. Spreader bars are required
for 08-14 size units; size 16 units do not require spreader bars.
Rollers may be used to move unit across a roof. Level by using
unit frame as a reference. See Table 2 and Fig. 15 for additional
information.
Lifting holes are provided in base rails as shown in Fig. 15. Re-
fer to rigging instructions on unit.
Fig. 15 — Rigging Details
CAUTION
PROPERTY DAMAGE HAZARD
Failure to follow this caution may result in damage to roof-
ing materials.
Membrane roofs can be cut by sharp sheet metal edges. Be
careful when placing any sheet metal parts on such roof.
WARNING
PERSONAL INJURY HAZARD
Failure to follow this warning could cause personal injury.
For vertical supply and return units, tools or parts could drop
into ductwork and cause an injury. Install a 90 degree turn in
the return ductwork between the unit and the conditioned
space. If a 90 degree elbow cannot be installed, then a grille
of sufficient strength and density should be installed to pre-
vent objects from falling into the conditioned space. Due to
electric heater, supply duct will require 90 degree elbow.
NOTES:
1. SPREADER BARS REQUIRED FOR SIZES 07-14 — Top damage will occur if spreader bars are not used.
2. Dimensions in ( ) are in millimeters.
3. 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.
UNIT
MAX WEIGHT
DIMENSIONS
ABC
lb kg in. mm in. mm in. mm
50TC-A07 1040 473 74.5 1890 38.0 965 41.5 1055
50TC-M08 1255 569 88.0 2235 40.0 1015 41.5 1055
50TC-M09 1305 592 88.0 2235 39.5 1005 49.5 1255
50TC-M12 1400 635 88.0 2235 41.0 1040 49.5 1255
50TC-D/E08 1410 641 88.0 2235 41.0 1040 41.5 1055
50TC-D/E09 1525 693 88.0 2235 40.5 1030 49.5 1255
50TC-D/E12 1565 711 88.0 2235 40.0 1015 49.5 1255
50TC-D/E14 1720 782 88.0 2235 28.5 725 53.0 1345
50TC-D/E16 2010 912 116.0 2945 57.5 1461 59.5 1510
DETAIL "A"
PLACE ALL SEAL STRIP IN PLACE
BEFORE PLACING UNIT ON ROOF CURB.
DUCT END
SEE DETAIL "A"
"A"
(914-1371)
36"- 54"
"C"
"B"
SPREADER
BARS
REQUIRED