Lennox CHA16 User Manual

FIGURE 60
NIGHT KIT
P4
RELAY K11
Page 52
FIGURE 58
J3P8
J8P4
TO ECONOMIZER
WARM UP KIT
SEE C2-1 WIRING DIAGRAM
IN 16 SERIES OPTIONAL CONTROLS MANUAL
ECONOMIZER
ENTHALPY CONTROL
WARM UP KIT RELAY KIT INSTALLATION 12.5 TON AND SMALLER UNITS
FIGURE 59
J24
J3
J33
P8
J8 P4
TO ECONOMIZER
J9 P9
WARM UP KIT
SEE C2-1 WIRING DIAGRAM
IN 16 SERIES OPTIONAL CONTROLS MANUAL
ECONOMIZER
ENTHALPY CONTROL
WARM UP KIT RELAY KIT INSTALLATION 15 TON AND LARGER UNITS
CAUTION
Do not connect a warm-up kit to a W7400 relay kit
or to a system using a T7300. Warm-up kit wiring
is not compatible with these control systems and
component damage will result. These control sys
tems have a warm-up feature built in. A warm-up
kit is not needed.
An economizer allows outside air to be used for cooling
when conditions are acceptable and permits a preset
amount of air exchange during all other unit operation.
Warm-up kit holds outdoor air dampers full closed dur
ing first heating demand after night setback (during
morning warm-up).
No wiring is required (see figures 58 and 59). The kit
plugs into the unit wiring harness between the unit
and economizer. Unit plug P3 is removed and dis
carded. Relay kit plug P8 connects to unit jack J3.
Relay kit jack J8 connects to economizer plug P4.
3 - C1 Wiring Diagram
Standard 2heat/2cool thermostat for all units without
economizer or warm-up. All wiring connections are
made to the unit low volatage terminal strip.
4 - C21 Wiring Diagram
Standard 2heat/2cool thermostat for all units with econo
mizer and warm-up. CMC3-1 clock and night thermostat
must be added for night setback. Night relay must also
be added to economizer for night setback. The warm up
kit plugsin" to the unit with plug P8. Warm up kit jack
J8 connects to unit jumper plug P3 or economizer plug
P4. The thermostat connects to the unit's low voltage
terminal strip.
5 - C11-1 Wiring Diagram
Standard 2heat/2cool ther
mostat for all units without
economizer or warm-up.
C11 Night Kit adds a relay
facilitating night setback
function (see figure 60). CMC3-1 clock and night ther
mostat must also be added to make setback relay func
tional.
WARNING
Connect only relay kits designed for this control
system. Relay kits designed for other control sys
tems are not compatible and control damage or
failure will result. For example, do not connect a
warm-up kit to this control system.

Lennox CHA16 Specifications

General

Brand	Lennox
Model	CHA16
Category	Air Conditioner
Language	English