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Recover, Recycling, and Reclamation for liquid charging
procedures.
Example:
CAS121
60 ft (18.3 m) linear line length
Equivalent line length 90 ft (27.4 m)
Liquid Lift: 20 ft (6.1 m)
Select line sizes from Table 8 (CAS072/091/121/151):
Liquid 1/2 in.
Suction 1-1/8 in.
Charge 23.1 lb (at 75 ft linear length)
80% of Operating Charge:
0.80 x 23.1 = 18.5 lb
Factory Shipping Charge: 9 lb
Field-Charge quantity: 18.5 – 9.0 = 9.5 lb
Step 6 — Install Accessories
Accessories requiring modifications to unit wiring should be
completed now. These accessories may include Winter
Start controls and Low Ambient controls. Refer to the in-
structions shipped with the accessory.
Step 7 — Complete Electrical Connections
WARNING
ELECTRIC SHOCK HAZARD
Failure to follow this warning could result in personal
injury or death.
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;
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 limita-
tions of 63°F (33°C) rise.
FIELD POWER SUPPLY
If equipped with optional Powered Convenience Outlet: The
power source leads to the convenience outlet's transformer
primary are not factory connected. Installer must connect
these leads according to required operation of the conve-
nience outlet. If an always-energized convenience outlet op-
eration is desired, connect the source leads to the line side
of the unit-mounted disconnect. (Check with local codes to
ensure this method is acceptable in your area.) If a de-
energize via unit disconnect switch operation of the conve-
nience outlet is desired, connect the source leads to the
load side of the unit disconnect. On a unit without a unit-
mounted disconnect, connect the source leads to compres-
sor contactor C and indoor fan contactor IFC pressure lugs
with unit field power leads.
Field power wires are connected to the unit at line-side
pressure lugs on compressor contactor C and TB1 (see wir-
ing diagram label for control box component arrangement)
or at factory-installed option non-fused disconnect switch.
Max wire size is #4 AWG (copper only).
CAS-072-153-01SI Rev. A
NOTE: TEST LEADS — Unit may be equipped with short
leads (pigtails) on the field line connection points on contac-
tor C or optional disconnect switch. These leads are for fac-
tory run-test purposes only; remove and discard before con-
necting field power wires to unit connection points. Make
field power connections directly to line connection pressure
lugs only.
FIRE HAZARD
Failure to follow this warning could result in personal
injury, death, or property damage.
Do not connect aluminum wire between disconnect
switch and unit. Use only copper wire. See Fig. 11.
UNITS
DISCONNECT
The factory-installed option disconnect switch is located in a
weatherproof enclosure located under the main control box.
The manual switch handle is accessible through an opening
in the access panel.
UNITS WITHOUT FACTORY-INSTALLED NON-FUSED
DISCONNECT
When installing units, provide a disconnect switch per NEC
(National Electrical Code) of adequate size. Disconnect siz-
ing data is provided on the unit informative plate. Locate on
unit cabinet or within sight of the unit per national or local
codes. Do not cover unit informative plate if mounting the
disconnect on the unit cabinet.
ALL UNITS
All field wiring must comply with NEC and all local codes.
Size wire based on MCA (Minimum Circuit Amps) on the
unit informative plate. See Fig. 12 for power wiring connec-
tions to the unit contactor and terminal block and equipment
ground.
Provide a ground-fault and short-circuit over-current protec-
tion device (fuse or breaker) per NEC Article 440 (or local
codes). Refer to unit informative data plate for MOCP (Max-
imum Over-current Protection) device size.
All units except 208/230-v units are factory wired for the
voltage shown on the nameplate. If the 208/230-v unit is to
be connected to a 208-v power supply, the control trans-
former must be rewired by moving the black wire with the
1/4-in. female spade connector from the 230-v connection
and moving it to the 208-v 1/4-in. male terminal on the pri-
mary side of the transformer. Refer to unit label diagram for
line-side information.
Affix the crankcase heater warning sticker to the unit discon-
nect switch.
Specifications subject to change without notice.
WARNING
Electric
Disconnect
Switch
Copper
Wire Only
Aluminum
Wire
Fig. 11 — Disconnect Switch and Unit
WITH
FACTORY-INSTALLED
NON-FUSED
13
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