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The 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
controller will energize the vent option and the ID
blower when the room CO
Default CO
set point is 950 ppm.
2
NOTE: On option X, field provided means to control
ventilation must be used if any of the motorized
ventilation options are installed.
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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 2100-601B
Page
20 of 42
controller on
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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.
"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
E
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
