Enthalpy switch/receiver and Enthalpy sensor
50 Carrier Sensors
Enthalpy switch/sensor specifications
The following specifications are the same for the switch/receiver and sensor unless noted.
Supply voltage Switch/Receiver:
Sensor:
24 Vac ±15%
24 to 36 Vdc
Operating range -40° to 140°F (-40° to 60°C)
Operating relative humidity 0 to 100%, non-condensing
Output Switch/Receiver:
Sensor:
Sourced 24 Vac through 10 Amp Form 1C relay
2-wire, 4–20 mA loop powered
Enthalpy range Sensor only 0–50 Btu/lb
Enthalpy accuracy ±1 Btu/lb at 77°F (25°C)
Temperature accuracy ±0.36°F (0.2°C) from 32 to 158°F (0 to 70°C)
Relative humidity accuracy ±35 at 77°F (25°C)
Sensitivity 0.1% RH
Repeatability 0.5% RH
Hysteresis < 0.4% RH
Stability < 2% drift over 5 years
Wiring specifications
Cable from sensor to controller: If <100 ft (30.5 meters) 22 AWG, unshielded
If >100 ft (30.5 meters) 22 AWG, shielded
Maximum length: 500 feet (152 meters)
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.
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