Condenser Fan Motor; Loss Of Charge Switch (Option); High Pressure Switch - Lennox 13ACX−018 Unit Information

SUCTION
1
SUCTION
POCKET
SUCTION
3
C − Condenser Fan Motor
All units use single−phase PSC fan motors which require a run
capacitor. In all units, the condenser fan is controlled by
the compressor contactor.
ELECTRICAL DATA tables in this manual show specifi-
cations for condenser fans used in 13ACX 's.
Access to the condenser fan motor on all units is gained
by removing the four screws securing the fan assembly.
See figure 7. The grill fan assembly can be removed from
the cabinet as one piece. See figure 8. The condenser fan
motor is removed from the fan guard by removing the four
nuts found on top of the grill. See figure 8 if condenser fan
motor replacement is necessary.
DANGER
Make sure all power is disconnected before beginning
electrical service procedures.
Remove
Remove
FIGURE 7
ORBITING SCROLL
STATIONARY SCROLL
HIGH PRESSURE GAS
screws
screws
SUCTION
2
FLANKS SEALED
BY CENTRIFUGAL
SUCTION
FORCE
MOVEMENT OF ORBIT
FIGURE 6
ALIGN FAN HUB FLUSH WITH END OF SHAFT
D − Loss of Charge Switch (option)
An auto-reset, single-pole/single-throw low loss of charge
switch is located in the suction line. This switch shuts off the
compressor when suction pressure drops below the factory
setting. The switch is closed during normal operating pres-
sure conditions and is permanently adjusted to trip (open) at
25 + 5 psi. The switch automatically resets when suction line
pressure rises above 55 + 5 psi.
E − High Pressure Switch
13ACX units are equipped with a high pressure switch that
is located in the liquid line. The switch (SPST, manual reset,
normally closed) removes power from the compressor con-
tactor control circuit when discharge pressure rises above
factory setting at 590 + 10 psi.
Page 5
INTERMEDIATE PRESSURE
GAS
CRESCENT
SHAPED
GAS POCKET
4
FIGURE 8
DISCHARGE
POCKET