6
•
Unit must be lifted by the four lifting holes located at the
base frame corners.
•
Lifting cables should be attached to the unit with shackles.
•
The distance between the crane hook and the top of the
unit must not be less than 60”.
•
Two spreader bars must span over the unit to prevent
damage to the cabinet by the lift cables. Spreader bars
must be of sufficient length so that cables do not come in
contact with the unit during transport. Remove wood struts
mounted beneath unit base frame before setting unit on
roof curb. These struts are intended to protect unit base
frame from fork lift damage. Removal is accomplished
by extracting the sheet metal retainers and pulling the
struts through the base of the unit. Refer to rigging label
on the unit.
Important: If using bottom discharge with roof curb, ductwork
should be attached to the curb prior to installing the unit. Ductwork
dimensions are shown in Roof Curb Installation Instructions.
Refer to the Roof Curb Installation Instructions for proper curb
installation. Curbing must be installed in compliance with the
National Roofing Contractors Association Manual.
Lower unit carefully onto roof mounting curb. While rigging
unit, center of gravity will cause condenser end to be lower
than supply air end.
To assist in determining rigging requirements, unit weights
are shown as follows:
A
B
C
D
CG
SUPPLY
RETURN
EVAPORATOR COIL
CONDENSER
COIL
COMPRESSOR
Y
X
CORNER & CENTER OF GRAVITY LOCATIONS
A* Model
X (in) Y (in)
Shipping
Weight (lbs
Operating
Weight (lbs)
Corner Weights ( lbs )
A
B
C
D
DTC036*
35
27
571
546
122
165
111
146
DTC048*
35
27
590
564
131
167
118
148
DTC060*
35
27
635
610
143
178
126 163
DTH036*
34
28
581
556
130
175
105 146
DTH048*
34
28
600
574
131
181
111
151
DTH060*
34
28
645
620
141
193
121 165
CAUTION
To prevent severe damage to the bottom of the unit, do not
fork lift the unit after wood struts have been removed.
Bring condenser end of unit into alignment with the curb. With
condenser end of the unit resting on curb member and using
curb as a fulcrum, lower opposite end of the unit until entire
unit is seated on the curb. When a rectangular cantilever
curb is used, care should be taken to center the unit. Check
for proper alignment and orientation of supply and return
openings with duct.
Rigging Removal
CAUTION
To prevent severe damage to the unit, do not allow crane
hooks and spreader bars to rest on the roof of the unit.
Remove spreader bars, lifting cables and other
rigging equipment.
ELECTRICAL WIRING
WARNING
HIGH VOLTAGE!
Disconnect all power before servicing or
installing this unit. Multiple power sources
may be present. Failure to do so may cause
property damage, personal injury or death.
WARNING
HIGH VOLTAGE!
To avoid personal injury or death due to electri
-
cal shock, do not tamper with factory wiring.
The internal power and control wiring of
these units are factory-installed and have
been thoroughly tested prior to shipment.
Contact your local representative if assis
-
tance is required.
Summary of Contents for DTC Series
Page 18: ...18 APPENDIX B ELECTRICAL DATA ...