7
3) Lift the cap out of the unit. (The cap can
be pushed up from the bottom by reaching
through the fork slot).
4) Cover the horizontal duct opening with the
horizontal duct cap. The insulation will be
on the indoor side.
5) Fasten the cover with screws to seal.
Clearance —
These units are approved for 0
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 gage and temperature rating.
WARNING:
To avoid the 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
electrical power 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.
and Air Conditioning Association (ACCA). The
ducts must be properly sized not to exceed .2”
w.c. pressure drop at 400 scfm per nominal ton
of cooling capacity.
Duct work should be attached directly to the unit
fl anges for horizontal applications. On roof curb
installations the ducts must be attached to the
curb hangers, not the unit.
Unconditioned Spaces —
All duct work passing
through unconditioned space must be properly
insulated to minimize duct losses and 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) Remove the horizontal duct cap.
2) Locate the duct cap inside the duct openings
and remove the screw holding it in place.
2"
Figure 6. Ground Level Installation
2”
Figure 7. Roof Top Installation
