Manual 2100-418F
Page
20 of 49
The climate Control
Option G
is an electronic non-
programmable thermostat and humidistat. The subbase
of the thermostat is factory wired to the front panel of
the unit. This option is compatible for use with the
optional CS2000A1 Energy Control Monitor and a
terminal block is provided for connection to the
CS2000A1. See Figure 17 for wiring diagram.
Compatible for use with Energy Recovery Ventilator or
Ventilator.
NOTE: The CS2000A1 (or other field provided means
to control ventilation) must be used if any of
the mechanical (motorized) ventilation options
are installed.
LOW VOLTAGE CONNECTIONS
These units use a grounded 24 volt AC low voltage
circuit.
The
“R”
terminal is the
hot
terminal and the
“C”
terminal is
grounded.
“G”
terminal or pin 6 of P4 is the
fan input.
“Y”
terminal or pin 7 of P4 is the
compressor input.
“B”
terminal or pin 8 of P4 is the
reversing valve input.
The reversing valve must be energized for heating
mode.
“R”
terminal or pin 10 of P4 is
24 VAC hot.
“C”
terminal or pin 11of P4 is
24 VAC grounded.
“L”
terminal or pin 12 of P4 is
compressor lockout
output.
This terminal is activated on a high or low
pressure trip by the electronic heat pump control. This
is a 24 VAC output.
FIGURE 14
BLOWER MOTOR LOW VOLTAGE
WIRE HARNESS PLUG
“W2”
terminal or pin 0 of P4 is
second stage heat
(if
equipped). If the unit is equipped with an optional hot
water coil plenum box the water valve will be
connected to this terminal.
“O1”
terminal or pin 5 of P4 is the
ventilation input.
This terminal energizes any factory installed ventilation
option.
NOTE: For total and proper control using DDC, a
total of 6 controlled outputs are required (5 if
no ventilation system is installed).
“5”
terminal of pin 2 of P4 is the
24 dehumidification
circuit.
“4”
terminal or pin 4 of P4 is the
dehumidification
circuit.
A contact
must
connect terminals 4 and 5.
“6”
terminal or pin 1 of P4 is
VAC grounded to the
humidistat
, if needed.
LOW VOLTAGE CONNECTION
FOR DDC CONTROL
Fan Only
Energize G
Cooling Mode
Energize Y, G
Heat Pump Heating
Energize Y, G, B
2nd Stage Heating
Energize G, W2
(if employed)
Ventilation
Energize G, O1
Dehumidification
Connect 4 and 5
MIS-1285
