Step 5 - Field Fabricate Ductwork - United Technologies Carrier WeatherMaker 50TC A08 Series Installation Instructions Manual

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 —
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.
UNIT
50TC-A08
50TC-A09
50TC-A12
50TC-D/E08
50TC-D/E09
50TC-D/E12
50TC-D/E14
50TC-D16
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.
Cabinet
MAX WEIGHT
lb kg in.
1290 586 88.0
1410 641 88.0
1515 689 88.0
1410 641 88,0
1525 693 88.0
1565 711 88,0
1720 782 88.0
912 2010 2945
Fig. 9 — Rigging Details
14
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.
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.
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.
Before setting the unit onto the curb, recheck gasketing on
the curb.
DIMENSIONS
A B
mm in.
2235 40.0 1015
2235 39.5 1005
2235 41,0 1040
2235 41.0 1040
2235 40.5 1030
2235 40,0 1015
2235 28,5
116.0 1461
C
mm in. mm
41,5 1055
49.5 1255
49,5 1255
41.5 1055
49,5 1255
49,5 1255
725 53,0 1345
57.5 1510 59.5