Manual 2100-549Q
Page
23 of 69
TAP
RANGE
240V
253 – 216
208V
220 – 187
LOW VOLTAGE CONNECTIONS FOR DDC CONTROL
Fan Only
Energize G
Cooling Part Load
Energize G, Y1
Cooling Full Load
Energize G, Y1, Y2
HP Heating Part Load
Energize G, Y1, B/W1
HP Heating Full Load
Energize G, Y1, Y2, B/W1
HP Heating Full Load + Electric Heat
(up to 10KW)
Energize G, Y1, Y2, B/W1, W2
Heating with Bank #1 Electric Heat Only
Energize G, W2
Emergency Heat (
Heat pump operation
is negated for this condition
)
Energize G, W2, W3
Ventilation
Energize A
Dehumidification *
* Models w/Dehumidification Only
Energize G, D
Thermostat
Predominant Features
8403-060
(1120-445)
3 Stage Cool; 3 Stage Heat
Programmable/Non-Programmable Electronic
HP or Conventional
Auto or Manual changeover
8403-067
(CDT-2W40-LCD-RLY)
Carbon Dioxide Sensor with LCD for
Sensor Readings
CS9B-THO
3 Stage Heat, 3 Stage Cool, Prog/NonProg, HP or Conv,
Auto or Manual Changeover, Humidity Sensor w/
dehumidification, Motion Sensor w/ Intelligent Learning
Control, BACnet-compatible
CS9B-THOC
3 Stage Heat, 3 Stage Cool, Prog/NonProg, HP or Conv,
Auto or Manual Changeover, Humidity Sensor w/
dehumidification, CO2 Sensor, Motion Sensor w/ Intelligent
Learning Control, BACnet-compatible
CS9BE-THO
3 Stage Heat, 3 Stage Cool, Prog/NonProg, HP or Conv,
Auto or Manual Changeover, Humidity Sensor w/
dehumidification, Motion Sensor, Intelligent Learning Control,
BACnet-compatible, Ethernet-compatible
CS9BE-THOC
3 Stage Heat, 3 Stage Cool, Prog/NonProg, HP or Conv,
Auto or Manual Changeover, Humidity Sensor w/
dehumidification, CO2 Sensor, Motion Sensor w/ Intelligent
Learning Control, BACnet-compatible, Ethernet-compatible
The standard unit includes a remote thermostat
connection terminal strip. See Figures 13 through 19
for connection diagrams. Compatible thermostats are
listed in Table 4.
TABLE 3 – Operating Voltage Range
NOTE:
The voltage should be measured at the field
power connection point in the unit and while the unit
is operating at full load (maximum amperage operating
condition).
WIRING – LOW VOLTAGE WIRING
230/208V, 1 PHASE AND 3 PHASE EQUIPMENT
DUAL PRIMARY VOLTAGE TRANSFORMERS
All equipment leaves the factory wired on 240V tap.
For 208V operation, reconnect from 240V to 208V tap.
The acceptable operating voltage range for the 240 and
208V taps are as noted in Table 3.
LOW VOLTAGE CONNECTIONS
These units use a grounded 24 volt AC low voltage circuit.
“G”
terminal is the
fan input
.
“Y1”
terminal is the
compressor part load input
.
“Y2”
terminal is the
compressor full load input
.
“B/W1”
terminal is the
reversing valve input
.
The reversing valve must be energized for heating mode.
“R”
terminal is
24 VAC hot
.
“C”
terminal is
24 VAC grounded.
“L”
terminal is
compressor lockout
output
. This
terminal is activated on a high or low pressure trip and
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.
TABLE 4 – Wall Thermostats
condensate overflow trip by the electronic heat pump
control. This is a 24 VAC output.
“W2”
terminal is
first stage electric heat
(if equipped).
First stage electric heat can be operated simultaneously
with the heat pump operating.
“A”
terminal is the
ventilation input
. This terminal
energizes any factory installed ventilation option.
“W3”
terminal is
second stage electric heat
. When
“W3” terminal is energized, it locks out compressor
operation to limit discharge air temperature and
required branch circuit ampacity.
“D”
terminal is the
dehumidification mode
(on models
so equipped).
NOTE:
For total and proper control using DDC, a
minimum of 9 controlled outputs are needed when
above 10KW Electric Heat is employed with ventilation,
a total of 8 controlled outputs with below 10KW
Electric Heat with Ventilation, 7 controlled outputs
below 10KW Electric Heat with no ventilation, 7
controlled outputs with no Electric Heat, but with
ventilation, and 6 controlled outputs with no electric
heat and no ventilation. If Dehumidification Model &
Vent, 10 controlled outputs are needed when above
10KW Electric Heat is employed with ventilation.
CAUTION
Do not plug in or unplug blower motor
connectors while the power is on. Failure to do
so may result in motor failure.
