Lennox GCS16-413-100

Page 72
FIGURE 96
WARM UP KIT
RELAY KIT INSTALLATION
J3 P4
J16
P16
WARM-UP KIT
GCS16 UNIT
HARNESS
TO ECONOMIZER
BLOWER
SUPPLY AIR
HARNESS FROM UNIT
P3 REMOVED AND DISCARDED
CONTROL MOUNTING BRACKET
HORIZONTAL UNITS
CONTROL MOUNTING BOX
DOWNFLOW UNITS
WARM-UP KIT
CAUTION - HARNESS BUNDLES MUST BE SE
CURED WITH WIRE TIES AWAY FROM DAMPER
BLADES. FAILURE TO SECURE WIRES COULD
RENDER ECONOMIZER INOPERABLE.
D-WarmUp Kit
The warmup kit is an option to the REMD16 and EMDH16
economizers. The warmup kit may be applied to any
economizer (except units using W7400 control system or
T7300 control system). If W973 control system is being
used, CMC3-1 time clock must also be used. If electrome
chanical control system is being used, CMC3-1 time clock
and night thermostat must be used.
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 during
first heating demand after night setback (during morning
warmup).
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 systems have a warm
up feature built in. A warmup kit is not needed.
No wiring is required (see figure 96). The kit plugs into the
unit wiring harness between the unit and economizer. Unit
plug P3 is removed and discarded. Relay kit plug P8 con
nects to unit jack J3. Relay kit jack J8 connects to econo
mizer plug P4.