Step 8 - Complete Electrical Connections - International comfort products CAS090 G Series Installation Instructions Manual

Step 8 — Complete Electrical Connections
WARNING
!
ELECTRICAL SHOCK HAZARD
Failure to follow this warning could result in personal
injury or death.
Do not use gas piping as an electrical ground. 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 electrical wire connected to unit ground lug in control
compartment, or conduit approved for electrical ground
when installed in accordance with NEC (National
Electrical Code); ANSI/NFPA 70, latest edition (in
Canada, Canadian Electrical Code CSA [Canadian
Standards Association] C22.1), and local electrical
codes.
NOTE: Check all factory and field electrical connections
for tightness. Field-supplied wiring shall conform with the
limitations of 63F (33C) rise.
Field Power Supply —
Field power wires are connected to the unit at line-side
pressure lugs on compressor contactor C and TB1 (see
wiring diagram label for
arrangement) or at factory-installed option non-fused
disconnect switch. Max wire size is #4 AWG (copper only).
NOTE: TEST LEADS - Unit may be equipped with short
leads (pigtails) on the field line connection points on
contactor C or optional disconnect switch. These leads are
for factory run-test purposes only; remove and discard
before connecting field power wires to unit connection
points. Make field power connections directly to line
connection pressure lugs only.
WARNING
!
FIRE HAZARD
Failure to follow this warning could cause in personal
injury, death and/or equipment damage.
Do not connect aluminum wire between disconnect
switch and condensing unit. Use only copper wire.
(See Fig. 8.)
ELECTRIC
DISCONNECT
SWITCH
WIRE ONLY
ALUMINUM
Fig. 8 - - Disconnect Switch and Unit
501 01 3600 01
control box component
COPPER
WIRE
A93033
Specifications are subject to change without notice.
Units with Factory-Installed Non- - Fused Disconnect —
The factory- - installed option non- - fused disconnect (NFD)
switch is located in a weatherproof enclosure located
under the main control box. The manual switch handle and
shaft are shipped in the disconnect enclosure. Assemble the
shaft and handle to the switch at this point. Discard the
factory test leads (see Fig. 9).
Units Without Disconnect Option
C
11
Disconnect
L1
208/230-3-60
460-3-60
575-3-60
Units With Disconnect Option
L1
2
Optional
Disconnect
L2 4
Switch
L3
6
Disconnect factory test leads; discard.
Fig. 9 - - Power Wiring Connections
Connect field power supply conductors to LINE side
terminals when the switch enclosure cover is removed to
attach the handle.
Fig. 10 - - Location of Non- - Fused Disconnect Enclosure
To field install the NFD shaft and handle:
1. Remove the unit front pane (see Fig. 2).
2. Remove (3) hex screws on the NFD enclosure - - (2) on
the face of the cover and (1) on the left side cover.
3. Remove the front cover of the NFD enclosure.
TB1
13
per
NEC
L2 L3
1
Factory
3
Wiring
5
C10204
C12284
11