Typical Field Wiring; Servicing Units Delivered Void Of Charge - Lennox ML14XC1 Series Manual

WIRE RUN LENGTH
LESS THAN 100' (30 METERS)
MORE THAN 100' (30 METERS) 16

Typical Field Wiring

Typical Field Wiring Diagram (Y and G Voltages)
NOTE – The thermostat used may be electromechanical
or electronic.
NOTE – Transformer in indoor unit supplies power (24
VAC) to the thermostat and outdoor unit controls.
COOLING:
1. Cooling demand initiates at Y1 in the thermostat.
2. 24VAC from indoor unit (Y1) energizes the TOC timed
off control (if used) which energizes contactor K1 (pro-
vided S4 high pressure switch is closed).
3. K1-1 N.O. closes, energizing compressor (B1) and out-
door fan motor (B4).
4. Compressor (B1) and outdoor fan motor (B4) begin im-
mediate operation..
END OF COOLING DEMAND:
5. Cooling demand is satisfied. Terminal Y1 is de-ener-
gized .
6. Compressor contactor K1 is de-energized.
7. K1-1 opens and compressor (B1) and outdoor fan mo-
tor (B4) are de-energized and stop immediately
AWG# INSULATION TYPE
18 TEMPERATURE RATING
35ºC MINIMUM.
FIGURE 17. Typical Field Wiring
INDOOR
BLOWER
G G
COMMON
C C
Typical Field Wiring Diagram (J Voltage)

Servicing Units Delivered Void of Charge

If the outdoor unit is void of refrigerant, clean the system
using the procedure described below.
1 - Leak test the system using the procedure outlined
on page 18.
2 - Evacuate the system using procedure outlined on
page 19.
3 - Use nitrogen to break the vacuum and install a new
filter drier in the system.
4 - Evacuate the system again using procedure
outlined on page 19.
5 - Weigh in refrigerant using procedure outlined in
figure 20.
Page 26
CONTROL
WIRING
C