United Technologies Carrier WeatherMaker 50TC A08 Series, Installation Instructions Manual

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ALTERNATE UNIT SUPPORT (IN LIEU OF CURB OR
SLAB MOUNT) — A non-combustible sleeper rail can be
used in the unit curb support area. If sleeper rails cannot be
used, support the long sides of the unit with a minimum of 3
equally spaced 4-in. x 4-in. (102 mm x 102 mm) pads on each
side.
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 di-
mensions are equal to or greater than the unit supply duct open-
ing 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 insu-
lated 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 applica-
ble fire codes.
FOR UNITS WITH ACCESSORY ELECTRIC HEAT-
ERS — All installations require a minimum clearance to com-
bustible 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.
Before setting the unit onto the curb, recheck gasketing on
the curb.
Fig. 9 — 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.
CAUTION
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 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.
NOTES:
1. SPREADER BARS REQUIRED — 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.
Use wooden top to prevent rigging straps from damaging unit.
UNIT
MAX WEIGHT
DIMENSIONS
A B C
lb kg in. mm in. mm in. mm
50TC-A08 1290 586 88.0 2235 40.0 1015 41,5 1055
50TC-A09 1410 641 88.0 2235 39.5 1005 49.5 1255
50TC-A12 1515 689 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-D16 912 2010 2945 116.0 1461 57.5 1510 59.5