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50VG-K: Installation Instructions
Horizontal Duct Covers
Fig. 9 – Supply and Return Duct Opening
Step 8 – Install Electrical Connections
WARNING
!
ELECTRICAL SHOCK HAZARD
Failure to follow this warning could result in personal injury or death.
The unit cabinet must have an uninterrupted, unbroken electrical
ground to minimize the possibility of personal injury if an electrical
fault should occur. This ground may consist of an electrical wire
connected to the unit ground screw in the control compartment, or
conduit approved for electrical ground when installed in accordance
with NFPA 70 (NEC) (latest edition) (in Canada, Canadian Electrical
Code CSA C22.1) and local electrical codes.
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
UNIT COMPONENT DAMAGE HAZARD
Failure to follow this caution may result in damage to the unit being
installed.
1.
Make all electrical connections in accordance with NFPA 70
(NEC) (latest edition) and local electrical codes governing such
wiring. In Canada, all electrical connections must be in
accordance with CSA standard C22.1 Canadian Electrical Code
Part 1 and applicable local codes. Refer to unit wiring diagram.
2.
Use only copper conductor
field-supplied electrical disconnect switch and unit. DO NOT
USE ALUMINUM WIRE.
3.
Be sure that high-voltage power to unit is within operating
voltage range indicated on unit rating plate. On 3-phase units,
ensure phases are balanced within 2 percent. Consult local
power company for correction of improper voltage and/or phase
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imbalance.
4.
Do not damage internal components when drilling through any
panel to mount electrical hardware, conduit, etc.
5.
Route field power supply(s) away from areas that could be
damaged by lawn and garden equipment or other accidental
damage.
High-Voltage Connections
The unit must have a separate electrical service with a field-supplied,
waterproof disconnect switch mounted at, or within sight from the unit.
Refer to the unit rating plate, NEC and local codes for maximum
fuse/circuit breaker size and minimum circuit amps (ampacity) for wire
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sizing.
The field-supplied disconnect may be mounted on the unit over the
high-voltage inlet hole when the standard power and low-voltage entry
points are used. See
See unit wiring label
making high voltage connections. Proceed as follows to complete the
high-voltage connections to the unit.
Single phase units:
1. Run the high-voltage (L1, L2) and ground lead into the control box.
2. Connect ground lead to chassis ground connection.
3. Locate the black and yellow wires connected to the line side of the
contactor.
4. Connect field L1 to black wire from connection 11 of the
compressor contactor.
10
CAUTION
!
for
connections
Fig. 2
and
Fig. 3
for acceptable location.
(Fig. 12
-
Fig.
17) and
Fig. 10
between
for reference when
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