8
Connect Ground and Power Wires
Connect ground wire to ground connection in control box for
safety. Connect power wiring to contactor as shown in Fig. 10.
DISCONNECT
PER N.E.C. AND/OR
LOCAL CODES
CONTACTOR
GROUND
LUG
FIELD GROUND
WIRING
FIELD POWER
WIRING
BLUE
3 PHASE ONLY
A94025
Fig. 10
---
Line Connections
A00010
Fig. 11
---
3--Phase Monitor Control
(Applies to 3--Phase Units Only)
Table 3—3--Phase Monitor LED Indicators
LED
STATUS
OFF
No call for compressor opera-
tion
FLASHING
Reversed phase
ON
Normal
UNIT DAMAGE HAZARD
Failure to follow this caution may result in equipment
damage or improper operation.
Ensure compressor rotation is correct.
S
3--phase scroll compresors are rotation
sensitive.
S
A flash LED on phase monitor indicates
reverse rotation. (See Fig. 11 and Table 3)
This will not allow contractor to be energized.
S
Disconnect power to unit and interchange 2
field--wiring leads on unit contactor.
CAUTION
!
Connect Control Wiring
Route 24v control wires through control wiring grommet and
connect leads to control wiring. See Thermostat Installation
Instructions for wiring specific unit combinations. (See Fig. 12.)
Use No. 18 AWG color--coded, insulated (35
°
C minimum) wire.
If thermostat is located more than 100 ft. from unit, as measured
along the control voltage wires, use No. 16 AWG color--coded
wire to avoid excessive voltage drop.
All wiring must be NEC Class 1 and must be separated from
incoming power leads.
Use furnace transformer, fan coil transformer, or accessory
transformer for control power, 24v/40va minimum.
NOTE
:
Use of available 24v accessories may exceed the
minimum 40va power requirement. Determine total transformer
loading and increase the transformer capacity or split the load
with an accessory transformer as required.
Final Wiring Check
IMPORTANT
: Check factory wiring and field wire connections
to ensure terminations are secured properly. Check wire routing
to ensure wires are not in contact with tubing, sheet metal, etc.
STEP 10
—
Compressor Crankcase Heater
When equipped with a crankcase heater, furnish power to heater a
minimum of 24 hr before starting unit. To furnish power to heater
only, set thermostat to OFF and close electrical disconnect to
outdoor unit.
A crankcase heater is required if refrigerant tubing is longer than
80 ft. Refer to the Long Line Guideline--Residential Split--System
Air Conditioners and Heat Pumps.
STEP 11
—
Install Electrical Accessories
Refer to the individual installation instructions packaged with kits
or accessories when installing.
25H
C
A
