Specifications

FIGURE 37
NIGHT KIT
P4
RELAY K11
Page 31
All wiring connections are made by jackplug connec
tions to the commercial controls harness in the unit. See
figure 36. Plug P8 in the warm up kit connects to Jack J3
in the unit to make this connection. Jack J8 in the warm
up kit connects to Plug P4 in the economizer. Thermo
stat wiring connections are made to the unit low voltage
terminal strip.
Some of the following optional thermostat control sys
tems have built-in warm up capabilities and the warm up
kit (figure 35) cannot be added due to wiring incompati
bility.
The warm-up kit is an option to the REMD24M econo
mizer. The warm-up kit may be applied to any econo
mizer (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 electro
mechanical control system is being used, CMC3-1 time
clock and night thermostat must be used.
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.
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).
FIGURE 36
J3P8
J8P4
TO ECONOMIZER
WARM-UP KIT
SEE C2-1 WIRING DIAGRAM
IN OPTIONAL CONTROLS MANUAL
ECONOMIZER
ENTHALPY CONTROL
WARMUP KIT RELAY KIT INSTALLATION
No wiring is required (see figure 36). The kit plugs into
the unit wiring harness between the unit and economiz
er. Unit plug P3 is removed and discarded. 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 voltage 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 37). 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 systems are not compatible and con
trol damage or failure will result. For exam
ple, do not connect a warm-up kit to this con
trol system.
All wiring connections are made by jackplug connec
tions to the commercial controls harness in unit (see fig
ure 38). Plug P4 in the economizer connects to Jack J3
in the unit to make connection.
FIGURE 38
J3
NIGHT KIT
PLUG P4
NIGHT KIT RELAY
NIGHT KIT INSTALLED IN FILTER
SECTION
Night (setback relay) kit allows GCS24 units without
REMD24M economizer to automatically set back" the
thermostat to reduce energy consumption during times
when the building is not occupied. The night kit achieves
this by disconnecting thermostat S1 and connecting a
night thermostat during periods when the building is not
occupied. The night thermostat can then be adjusted
with a lower setpoint as needed for unoccupied heating.