Enthalpy Switch/Sensor Specifications; Wiring Specifications; Mounting Location - Carrier SPS Installation Manual

Enthalpy switch/receiver and Enthalpy sensor

Enthalpy switch/sensor specifications

The following specifications are the same for the switch/receiver and sensor unless noted.
Supply voltage
Operating range
Operating relative humidity
Output
Enthalpy range
Enthalpy accuracy
Temperature accuracy
Relative humidity accuracy
Sensitivity
Repeatability
Hysteresis
Stability

Wiring specifications

Cable from sensor to controller:
Maximum length:

Mounting location

Mount the enthalpy switch/receiver in the outdoor air intake.
Mount the enthalpy sensor in the return air duct.
Do not mount the enthalpy switch/receivers and sensors where they could be exposed to outdoor elements
such as rain or snow. These units are not NEMA 4 enclosures.
50
Switch/Receiver: 24 Vac ±15%
Sensor: 24 to 36 Vdc
-40° to 140°F (-40° to 60°C)
0 to 100%, non-condensing
Switch/Receiver: Sourced 24 Vac through 10 Amp Form 1C relay
Sensor: 2-wire, 4–20 mA loop powered
Sensor only 0–50 Btu/lb
±1 Btu/lb at 77°F (25°C)
±0.36°F (0.2°C) from 32 to 158°F (0 to 70°C)
±35 at 77°F (25°C)
0.1% RH
0.5% RH
< 0.4% RH
< 2% drift over 5 years
If <100 ft (30.5 meters)
If >100 ft (30.5 meters)
500 feet (152 meters)
22 AWG, unshielded
22 AWG, shielded
Carrier Sensors