6
Remove wood struts mounted beneath unit base frame be-
fore 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 rig-
ging 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 In-
stallation 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:
CORNER & CENTER OF GRAVITY LOCATIONS
A
B
C
D
CG
SUPPLY
RETURN
EVAPORATOR COIL
CONDENSER
COIL
COMPRESSOR
Y
X
A
B
C
D
DCC072*
35
27
650
625
147
185
127
166
DCH072*
34
28
660
635
142
200
122
171
Corner Weights (lbs)
* Weights shown are belt drive with no accessories
A*
Model
X
(in)
Y
(in)
Shipping
Weight
(lbs.)
Operating
Weight
(lbs)
T
O
PREVENT
SEVERE
DAMAGE
TO
THE
BOTTOM
OF
THE
UNIT
,
DO
NOT
FORK
LIFT
UNIT
AFTER
WOOD
STRUTS
HAVE
BEEN
REMOVED
.
CAUTION
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 can-
tilever curb is used, care should be taken to center the unit.
Check for proper alignment and orientation of supply and
return openings with duct.
r
igging
r
emOval
Remove spreader bars, lifting cables and other rigging
equipment.
ELECTRICAL WIRING
For unit protection, use a fuse or hacr circuit breaker that is
in excess of the circuit ampacity, but less than or equal to the
maximum overcurrent protection device. DO NOT EXCEED
THE MAXIMUM OVERCURRENT DEVICE SIZE SHOWN
ON UNIT DATA PLATE.
All line voltage connections must be made through weath-
erproof fittings. All exterior power supply and ground wiring
must be in approved weatherproof conduit.
The main power supply wiring to the unit and low voltage wir-
ing to accessory controls must be done in accordance with
these instructions, the latest edition of the National Electrical
Code (ANSI/NFPA 70), and all local codes and ordinances.
T
O
PREVENT
DAMAGE
TO
THE
UNIT
,
DO
NOT
ALLOW
CRANE
HOOKS
AND
SPREADER
BARS
TO
REST
ON
THE
ROOF
OF
THE
UNIT
.
CAUTION
HIGH VOLTAGE!
D
ISCONNECT
ALL
POWER
BEFORE
SERVICING
OR
INSTALLING
THIS
UNIT
. M
ULTIPLE
POWER
SOURCES
MAY
BE
PRESENT
. F
AILURE
TO
DO
SO
MAY
CAUSE
PROPERTY
DAMAGE
,
PERSONAL
INJURY
OR
DEATH
.
WARNING
HIGH VOLTAGE!
T
O
AVOID
PERSONAL
INJURY
OR
DEATH
DUE
TO
ELECTRICAL
SHOCK
,
DO
NOT
TAMPER
WITH
FACTORY
WIRING
. T
HE
INTERNAL
POWER
AND
CONTROL
WIRING
OF
THESE
UNITS
ARE
FACTORY
-
INSTALLED
AND
HAVE
BEEN
THOROUGHLY
TESTED
PRIOR
TO
SHIPMENT
.
C
ONTACT
YOUR
LOCAL
REPRESENTATIVE
IF
ASSISTANCE
IS
REQUIRED
.
WARNING
T
O
PREVENT
DAMAGE
TO
THE
WIRING
,
PROTECT
WIRING
FROM
SHARP
EDGES
. F
OLLOW
NATIONAL
ELECTRICAL
CODE
AND
ALL
LOCAL
CODES
AND
ORDINANCES
. D
O
NOT
ROUTE
WIRES
THROUGH
REMOVABLE
ACCESS
PANELS
.
CAUTION
C
ONDUIT
AND
FITTINGS
MUST
BE
WEATHER
-
TIGHT
TO
PREVENT
WATER
ENTRY
INTO
THE
BUILDING
.
CAUTION
