Lennox EL23XCV Series User Manual

Page 56
Y1 DEMAND
OR COOLING
DEMAND
*SUCTION
PRESSURE ABOVE
CUT-OUT OF
40 PSIG
CONTACTOR
ENERGIZED
SUCTION
PRESSURE
CUT-OUT IS
IGNORED FOR
90 SECONDS
SUCTION PRESSURE
ABOVE CUT-OUT
OF 40 PSIG
CONTACTOR
DE-ENERGIZED
ANTI-SHORT
CYCLE TIMER
BEGINS
INCREMENT
5-STRIKE
COUNTER
1
LED ALERT
CODE / OR
MODERATE
ALERT 410
DISPLAYED
ANTI-SHORT
CYCLE TIMER
ENDS
CONTACTOR
ENERGIZED
WAITING FOR
PRESSURE
TO RISE ABOVE
90 PSIG
IS BYPASSED IF OUTDOOR
AMBIENT TEMPERATURE IS 15ºF
OR BELOW
SUCTION PRESSURE CUT-OUT
3
5-STRIKE
COUNTER
REACHES 5
WITHIN A SINGLE
Y1 DEMAND
LOW
PRESSURE
LOCKOUT
LED ALERT
CODE / OR
CRITICAL
ALERT 411
DISPLAYED
SERVICE
REQUIRED
2
LED ALERT
CODE / OR
MODERATE
ALERT 410
DISPLAYED
SERVICE
REQUIRED
2
NORMAL
OPERATION
YES
YES
NO
NO
NO
YES
YES
1.
The thermostat terminates demand when the contactor
is de-energized. If demand is satisfied when alarm is
not active, the 5-strike counter resets.
2.
door control (A175) R terminal.
3. The suction pressure cut-out of 40 psig is ignored by the
system when
the outdoor temperature is below 15°F.
SUCTION
PRESSURE ABOVE
CUT-IN OF
90 PSIG
NO
*EL23XCV does not have a low pressure switch
and LPS terminals are not jumpered. The unit has a
suction pressure transducer that emulates the low
pressure switch with a cut-out of 40 PSIG and a
cut-in of 90 PSIG.
FIGURE 28. Low Pressure Switch Emulated by Suction Pressure Transducer Sequence of Operation (All Units)

Lennox EL23XCV Series Specifications

General

Brand	Lennox
Model	EL23XCV Series
Category	Air Handlers
Language	English