Step 6 - Install Accessories; Step 7 - Complete Electrical Connections - Carrier 38AUD 16 Series Installation, Start-Up And Service Instructions Manual

Step 6 — Install Accessories
Accessories requiring modifications to unit wiring should
be completed now. These accessories may include Winter
Start controls, Low Ambient controls. Refer to the
instructions shipped with the accessory.
Step 7 — 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
local electrical codes or in absence of local codes, it is
recommended that the U.S.A. standard ANSI/NFPA
70, National Electrical Code (NEC), be followed.
NOTE: Check all factory and field electrical connections
for tightness. Field-supplied wiring shall conform with the
limitations of 33C (63F) rise.
Field Power Supply —
All units are factory wired for the voltage shown on the
nameplate. Refer to unit label diagram for additional
information.
Field power wires are connected to the unit to compressor
contactor C1 and terminal block TB1 pressure lugs in the
unit's main control box or at factory-installed option
non-fused disconnect switch (see Fig. 11). 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. 10.)
ELECTRIC
DISCONNECT
SWITCH
Fig. 10 - - Disconnect Switch and Unit
Units Without Factory-Installed Disconnect —
When installing units, provide a disconnect switch of
adequate size per local or national wiring code.
Disconnect sizing 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.
Units with Factory-Installed 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.
All Units -
All field wiring must comply with all local codes. Size wire
based on MCA (Minimum Circuit Amps) on the unit
informative plate. See Fig. 11 for power wiring connections
to the unit load terminals and equipment ground.
Provide a ground- - fault and short- - circuit over- - current
protection device (fuse or breaker) per local code (or in
absence of local code, is is recommended that U.S.A.
standard, NEC Article 440, be followed). Refer to unit
informative data plate
Over- - current Protection) device size.
All field wiring must comply with the appropriate national
electrical codes and local requirements.
15
COPPER
WIRE ONLY
ALUMINUM
WIRE
A93033
for MOCP (Maximum