Specifi cations/Product Ordering
Thermostats
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A-64
Operating Voltage
................................................................ 24 Vac ±20%
Frequency
................................................................................... 50/60 Hz
Power Consumption
..........................................................Maximum 6 VA
Control Output FAN
........................................................................24 Vac
Rating
............................................................................ Maximum
5(3)A
Control Outputs Cooling and Heating
..........................................24 Vac
Rating
............................................................................ Maximum
5(3)A
Control Output Aux. Heating
.........................................................24 Vac
Rating
............................................................................ Maximum
5(3)A
Remote Temperature Sensor
Status Input 8-7
...................................................QAH11.1 Safety Class II
NTC resistor 3 k ohm at 77°F (25°C)
Status input D1 and GND
Operating Action Selectable ..................................... Normal Open (NO)
Contact Sensing ..................................................... Normal Closed (NC)
Insulation Against Line Voltage ..........SELV 6 to 15 Vdc/3 to 6 mA, 4kV
Reinforced
Insulation
Permissible Cable Length with Copper Cable
2 X16 AWG or 1 X14 AWG for Connection to
Terminals 8 and D1
.............................................................. 262 ft. (80 m)
Setpoint Setting Range
......................................... 46 to 95°F (8 to 35°C)
Control Deviation at 77°F (25°C)
........................ M 1°F (0.5 K)
Setting Range ................................................................ Factory Setting
Switching Differential in Heating Mode (adj)
.....1 to 7°F
3.5°F (2 K)
Switching Differential in Cooling Mode (adj)
.....1 to 7°F
2°F (1 K)
Setpoint Differential WD (Adjustable)
.................1 to 9°F
3.5°F (2 K)
Setpoint (Energy Saving Mode), Heating
.......46 to 64°F 61°F (16°C)
Setpoint (Energy Saving Mode), Cooling
.......75 to 95°F 82.5°F (28°C)
Operation
Temperature ...................................................... 32 to 122°F (0 to 50°C)
Humidity
.................................................................................. <95%
RH
Shipping and Storage
Temperature ..............................................-13 to +158°F (-25 to +70°C)
Humidity
.................................................................................. <95%
RH
Agency Approvals
................................... Conforms to CE Requirements
NEMA
1
Connection Terminals
.................................................Use Solid Wires or
Prepared Stranded Wires. 22 AWG to 14 AWG
Housing Cover Color
....................................................................... White
Shipping Weight
............................................................ 0.5 lb. (0.225 kg)
Description
Part
No.
Room
Temperature
Controller
RDX42.22U
RDX...
Wiring Diagrams
TH0873R2
SN
SP
B1
4
9 8
D1 GND
1
12
5
2
10
24 V
ac
3
7
5(3)A
max.
5(3)A
max.
5(3)A
max.
6
11
5(3)A
max.
QAH11.1
Key
6
Cooling output NC contact
5
Cooling output NO contact
11
Heating output NC contact
9
Heating output NO contact
RDX… Four-pipe System Wiring
TH0874R1
SN
SP
4
9
8
D1 GND
1
12
5
2
10
5(3)A
max.
5(3)A
max.
5(3)A
max.
24 Vac
6
11
3
7
5(3)A
max.
QAH11.1
B1
RDX… Heat Pump Wiring
Key
6
Cooling output NC contact for reversing valve
5
Cooling output NO contact for compressor
11
Heating output NC contact for reversing valve
9
Heating output NO contact for compressor
Note:
Outputs 5 and 10 must be wired together for compressor control