Lennox EL23XCV Series User Manual

Page 47
Reconguring Outdoor Control using S30/
S40 Thermostat
Reconguring only applies to EL23XCV units installed as
a fully communicating system with an S30/S40 thermostat
and communicating indoor unit.
If any component of the HVAC system is changed, e.g. re-
placing an outdoor sensor, reconguring the system is re-
quired. To begin reconguring a system, select the Setup tab.
System Overview
Refer to the applicable Thermostat Installer Setup Guide
for conguration procedures.
The outdoor control provides the following functions:
• Internal switching of outputs.
• Compressor anti-short-cycle delay (adjustable through
the thermostat interface).
• Five-strike lockout function.
• High Pressure protection using the High Pressure
Switch (S4) and Low Pressure Pressure protection us-
ing the Suction Pressure Transducer with setpoints that
emulates a low pressure switch. (Cut-out of 40 psig and
cut-in of 90 psig).
• Ambient (RT13), liquid line (RT36) and suction line
(RT41) temperatures for monitoring and protection.
COMPRESSOR PROTECTION – FIVE-STRIKE LOCK-
OUT
The ve-strike lockout function is designed to protect the
compressor from damage. The ve-strike feature is used
for both high (S4) and low (S87) pressure switches.
Resetting Five-Strike Lockout
Once the condition has been rectied, power to the out-
door control R terminal must be cycled OFF.
Diagnostic Information - Installations with
S30/S40 Thermostat
The following diagnostic information is available through
the thermostat's user interface. Refer to the applicable In-
staller System Setup Guide.
• Compressor anti-short-cycle delay timer status
• Cooling stage or cooling rate
• Compressor shift delay timer status
• High pressure switch status
• Suction pressure
• Compressor top cap switch status
• Liquid line and suction line temperature
• Outdoor ambient temperature
• Compressor active alarm
• Compressor Hz
• Inverter compressor short cycle
• Heat sink temperature
• Liquid pressure
Installer Test - Installations with S30/S40
Thermostat
Verify the proper operation of the system by running the
Installer Test feature through the thermostat interface. Re-
fer to the applicable Installer System Setup Guide.
COMPRESSOR SHORT CYCLING DELAY
The outdoor control protects the compressor from:
• Short cycling (ve minutes) during initial power-up.
• Interruption in power to the unit.
• Pressure or sensor trips.
• Delay after demand is removed.
The delay is set by default for 300 seconds (ve minutes)
but can be changed through the thermostat interface (S30/
S40 thermostat installations only).
Available settings are 60, 120, 180, 240 and 300 seconds.
CRANKCASE HEATER (HR1)
Compressors in all units are equipped with a 40-watt bel-
lyband- type crankcase heater. HR1 prevents liquid from
accumulating in the compressor. HR1 is controlled by the
crankcase heater thermostat.
CRANKCASE HEATER THERMOSTAT (S40)
Thermostat S40 controls the crankcase heater in all units.
S40 is located on the liquid line. When liquid line tempera-
ture drops below 50°F, thermostat S40 closes, energizing
HR1. The thermostat opens, de-energizing HR1, once liq-
uid line temperature reaches 70°F.

Lennox EL23XCV Series Specifications

General

Brand	Lennox
Model	EL23XCV Series
Category	Air Handlers
Language	English