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When the thermostat is set in the automatic mode,
the thermostat can change automatically to the heat
or cool modes to maintain the temperature set on the
thermostat.
The CO
controller will energize the vent option and the
2
ID blower when the room CO
Default CO
set point is 950 ppm (see Figure 23 on
2
page 33).
Climate Control Option B & C are an electronic,
programmable thermostat and (CO
C Model only) with BACnet MS/TP or Ethernet
connections.
The thermostat can be set in the heat, cool or
automatic mode. When the thermostat is set in
the heat mode, it can heat only to maintain the
temperature set on the thermostat. When the
thermostat is set in the cool mode, it can cool only
to maintain the temperature set on the thermostat.
When the thermostat is set in the automatic mode,
the thermostat can change automatically to the heat
or cool modes to maintain the temperature set on the
thermostat.
Option C (Models only) the CO
will energize the vent option and the ID blower when
the room CO
levels rise over set level. Default CO
2
point is 950 ppm.
NOTE: On Option X, field-provided means to control
ventilation must be used if any of the motorized
ventilation options are installed.
L
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V
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GENERAL
This unit is equipped with a variable speed ECM motor.
The motor is designed to maintain rated airflow up to
the maximum static allowed. It is important that the
blower motor plugs are not plugged in or unplugged
while the power is on. Failure to remove power prior
to unplugging or plugging in the motor could result in
motor failure.
Manual 2100-601E
Page
20 of 42
levels rise over set level.
2
controller on
2
sensor in the controller
2
2
C
O
N
N
E
C
T
O I
N
S
F
O
R
O
N
T
R
O
L
E
n
r e
i g
e z
G
E
n
r e
i g
e z
, Y
G
E
n
r e
i g
e z
, Y
G
,
B
E
n
r e
i g
e z
G
,
W
2
E
n
r e
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e z
G
,
O
1
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n
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, B
W
, 2
E
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 pins 6 and 1 of P2 are the fan inputs.
Both must be energized for proper fan operation. This
is done automatically in the factory installed climate
control options. If the climate control option is
abandoned and connections are made directly to P2
both pins 6 and 1 of P2 must be energized for proper
operation.
"Y" terminal or pin 7 of P2 is the compressor input.
"B" terminal or pin 8 of P2 is the reversing valve input.
The reversing valve must be energized for heating
mode.
"R" terminal or pin 10 of P2 is 24 VAC hot.
"C" terminal or pin 11 of P2 is 24 VAC grounded.
"L" terminal or pin 12 of P2 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.
set
"W2" terminal or pin 9 of P2 is second stage heat (if
equipped). If the unit is equipped with an optional
hot water coil plenum box or electric heat these will be
energized by this terminal.
"O1" terminal of pin 5 of P2 is the ventilation input.
This terminal energizes any factory installed ventilation
option.
"E" terminal or pin 3 of P2 is the emergency heat
input. This terminal energizes the emergency heat
relay.
NOTE: For total and proper control using DDC, a total
of 6 controlled outputs are required (5 if no ventilation
system is installed). For proper system operation under
Emergency Heat conditions. Where the compressor
needs to be deactivated, the B-W2-E outputs need
to be energized. Removing the Y (compressor) signal
alone turns the compressor off, but does not activate
the additional circuitry embedded in the heat pump for
proper and complete operation.
Do not plug in or unplug blower motor
connectors while the power is on. Failure to do
so may result in motor failure.
CAUTION
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Troubleshooting
