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FIGURE 12
FIGURE 10
VOLTAGE CONNECTIONS DIAGRAMS — STANDARD CONTROL WIRING
VOLTAGE CONNECTIONS DIAGRTAMS – STAMDARD CONTROL WIRING
*L2 connection 3Phase Only
XI. INDOOR AIR FLOW
DATA
All 208/230 volt units are equipped
with multi-speed indoor blower
motors. Each unit is shipped factory
wired for the proper speed at a
normal external static. See Table D
for blower performance.
XII. CRANKCASE HEAT
(OPTIONAL)
At initial startup or after extended
shutdown periods, make sure
crankcase heat is energized for at
least 12 hours before compressor is
started (disconnect switch closed and
wall thermostat "OFF" position).
18
F. THERMOSTAT
The thermostat should be mounted on an inside wall about five feet above the floor
in a location where it will not be affected by unconditioned air, sun, or drafts from
open doors or other sources. READ installation instructions in thermostat package
CAREFULLY because each has some different wiring requirements.
Y G R W C
L
Y2
Y G R W C
L
Y2
THERMOSTAT
Crankcase heat is not required on
XII. INDOOR AIR FLOW DATA
scroll type compressors, but may be
necessary for difficult starting
All 208/230 volt units are equipped with multi-speed indoor blower motors. Each unit is
shipped factory wired for the proper speed at a normal external static.
situations.
XIII. PRE-START CHECK
XIII. CRANKCASE HEAT (OPTIONAL)
1. Is unit properly located and
slightly slanted toward indoor
At initial startup or after extended shutdown periods, make sure crankcase heat is ener-
condensate drain?
gized for at least 12 hours before compressor is started (disconnect switch closed and
2. Is ductwork insulated,
wall thermostat "OFF" position).
weatherproofed, with proper
Crankcase heat is not required on scroll type compressors, but may be necessary for
spacing to combustible
difficult starting situations.
materials?
3. Is air free to travel to and from
XIV. PRE-START CHECK
outdoor coil? (See Figure 2.)
4. Is the wiring correct, tight, and
1. Is unit properly located and slightly slanted toward condensate drain?
according to unit wiring diagram?
2. Is ductwork insulated, weatherproofed, with proper spacing to combustible materi-
als?
5. Is unit grounded?
3. Is air free to travel to and from outdoor coil? (See Figure 4.)
6. Are field supplied air filters in
4. Is the wiring correct, tight, and according to unit wiring diagram?
place and clean?
5. Is unit grounded?
7. Do the outdoor fan and indoor
6. Are field supplied air filters in place and clean?
blower turn freely without
rubbing, and are they tight on the
7. Do the outdoor fan and indoor blower turn freely without rubbing, and are they tight
on the motor shafts?
motor shafts?
8. Has crankcase heat been on for at least 12 hours?
8. Has crankcase heat been on for
at least 12 hours?
XV. STARTUP
1. Turn thermostat to "OFF," turn "on" power supply at disconnect switch.
2. Turn temperature setting as high as it will go.
3. Turn fan switch to "ON."
4. Indoor blower should run. Be sure it is running in the right direction.
5. Turn fan switch to "AUTO." Turn system switch to "COOL" and turn temperature set-
ting below room temperature. Unit should run in cooling mode.
6. Is outdoor fan operating correctly in the right direction?
7. Is compressor running correctly.
Y - Cooling (Low Stage in 2 Stage Systems)
G - Fan Only
R - 24v
W - Heating
C - Common
Y2 - High Stage Cooling (Two Stage Only)
L -
Alert Codes (Optional with Comfort Alert
and Compatiable Thermostat)
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