9
prevent condensation. Use insulation with an
outer vapor barrier. Refer to local codes for
insulation material requirements.
Acoustical Duct Work — Certain installations
may require the use of acoustical lining inside
the supply duct work. Acoustical insulation must
be in accordance with the current revision of the
Sheet Metal and Air Conditioning Contractors
National Association (SMACNA) application
standard for duct liners. Duct lining must be UL
classifi ed batts or blankets with a fi re hazard
classifi cation of FHC-25/50 or less. Fiber duct
work may be used in place of internal duct liners
if the fi ber duct work is in accordance with the
current revision of the SMACNA construction
standard on fi brous glass ducts. Fibrous duct
work and internal acoustical lining must be NFPA
Class 1 air ducts when tested per UL Standard
181 for Class 1 ducts.
Horizontal to Down fl ow Conversion — The unit
is shipped ready for horizontal duct connections.
If down fl ow ducts are required, the unit must be
converted following the steps below for both the
supply and return ducts.
1) Locate the duct cap inside the duct openings
and remove the screw holding it in place.
2) Lift the cap out of the unit. (The cap can be
pushed up from the bottom by reaching
through the fork slot).
3) Cover the horizontal duct opening with the
cap. The insulation will be on the indoor
side.
4) Fasten the cover with screws and seal to
prevent air leakage.
Clearance — This unit is approved for 6 inch
clearance.
ELECTRICAL WIRING
General — Electrical power wiring must be
made in accordance with all applicable local
codes and ordinances, and with the current
revision of the National Electric Code NFPA 70
or in Canada CSA C.22.1 - Canadian Electrical
Code Part 1. If any of the original wire as supplied
with the unit must be replaced, it must be
replaced with material of the same gauge and
temperature rating.
WARNING:
To avoid risk of electrical shock,
personal injury, or death, disconnect
all electrical power to the unit before
performing any maintenance or service.
The unit may have more than one elec-
trical supply.
Line Voltage — Before proceeding with the
electrical connections, make certain that the
voltage, frequency, and phase of the supply
source are the same as those specifi ed on the unit
rating plate. Also verify that the service provided
by the utility is suffi cient to handle the additional
load imposed by this equipment.
See the unit wiring label for proper high and low
voltage wiring. Make all electrical connections
in accordance with all applicable codes and
ordinances.
Use a separate branch electrical circuit for this
unit. A means of electrical disconnect must be
located within sight of and readily accessibility
to the unit. Internally mounted circuit breakers
are available as fi eld installed options. These
circuit breakers can be used as an electrical
disconnect.
The unit is shipped from the factory wired for 240
volt transformer operation. For 208 volt operation,
remove the lead from the transformer terminal
marked 240V and connect it to the terminal
marked 208V. For maximum ampacity and over
current protection, see the unit rating plate.
Provide power supply (or supplies) for the unit in
accordance with the unit wiring diagram, and the
PIN NUMBER
MOTOR SPEED
WIRE COLOR
1
LOW
RED
2
4
HIGH
BLACK
3
MEDIUM
BLUE
5
N/A
N/A
6
COMMON
WHITE
1
2
4
3
5
6
RED
BLACK
BLUE
WHITE
Figure 7. Motor Lead Connector - Standard Motor
