Honeywell Enthalpy Sensor

FEATURES

The C7400A Enthalpy Sensor is used with the economizer logic modules with the A, B, C, and D performance curves. The sensors combined with the economizer logic modules permit the use of outdoor air as the first stage of cooling in heating, ventilating and air conditioning (HVAC) systems.

• Senses and combines temperature and humidity of outdoor air.
• As enthalpy of outdoor air increases, the outdoor air damper closes to a preset minimum position.
• As enthalpy of outdoor air becomes low, the outdoor air damper opens to reduce the mechanical cooling load in the building.
• Maximum economizer savings is achieved when two C7400 Enthalpy Sensors are used for differential enthalpy changeover control.
• Compact size and lightweight construction allows easy mounting in HVAC rooftop unit. A duct mounting kit a is available.
• Sensors are enclosed in a rugged, corrosion-resistant glass-fiber reinforced plastic duct-mount case.
• Provides a 4 to 20 mA output signal to Economizer Logic Module; setpoint is located on the logic module.

SPECIFICATIONS

Output Signal
• 4 to 20 mA current signal increases from 4 mA to 20 mA as enthalpy decreases.

Ambient Temperature Ranges
• Shipping: -40°F to 150°F (-40°C to 66°C)
• Operating: -40ºF to 150ºF (-40ºC to 65.6ºC)

Maximum Power Consumption
• 3.5mA minimum @ 40 Vdc-20 mA: 0.8 VA maximum

Supply Voltage
• 12 to 40 Vdc

Electrical Connections
• Two 1/4 in. (6 mm) quick connect terminals.

Approvals
• Underwriters Laboratories Inc. Flammability Rating: UL94-5V.