Step 5 - Field Fabricate Ductwork - Carrier 50TC Series Installation Instruction

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
dimensions 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.
CAUTION
!
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.
UNIT
50TC ---A08 1290
50TC ---A09 1410
50TC ---A12 1515
50TC ---D/E08 1410
50TC ---D/E09 1525
50TC ---D/E12 1565
50TC ---D/E14 1720
NOTES:
1. Dimensions in ( ) are in millimeters.
2. SPREADER BARS REQUIRED — Top damage will occur if spreader bars are not used.
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.
MAX WEIGHT
LB KG IN
586 88.0
641 88.0
689 88.0
641 88.0
693 88.0
711 88.0
782 88.0
Fig. 7 - - Rigging Details
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.
!
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 prevent objects
from falling into the
electric heater, supply duct will require 90- - degree
elbow.
DIMENSIONS
A B
MM IN
2235 40.0
2235 39.5
2235 41.0
2235 41.0
2235 40.5
2235 40.0
2235 28.5
11
WARNING
conditioned space. Due to
C
MM IN MM
1015 41.5 1055
1005 49.5 1255
1040 49.5 1255
1040 41.5 1055
1030 49.5 1255
1015 49.5 1255
725 53.0 1345
C06005