Nepra™ 4000 Series Heat Pump Thermostat

Product Description

Enjoy precise temperature control with the Nepra™ 4000 from PSG Controls, a 24 volt heating and cooling digital thermostat designed for use with packaged terminal heat pumps and air conditioners. This versatile thermostat can also be configured for use on 4-pipe or 2-pipe units with electric heat fan coil systems.

Featuring low, medium and high fan cycle speeds as well as calls for heating and cooling, this thermostat provides digital set point display, configurable limits and automatic heat/cool changeover.  The control can be placed in economy mode or off mode with 40° freeze protection.

Quick Specs

  • Input Voltage: 24 VAC
  • Load Rating: 1.5 amps per circuit
  • Temperature Monitor Range: 60°F to 85°F32.0°F to 99.9°F (0.0°C to 37.7°C)
  • 3.5”W x 5.0”H x 1.5”D


Weight 1 lbs
Dimensions 6 × 6 × 6 in
Input Voltage

24 VAC

Load Rating

1.5 amps per circuit

Temperature Monitor Range

60°F to 85°F32.0°F to 99.9°F (0.0°C to 37.7°C)

Economy Limits

Maintains room temperature between 60.0°F and 85.0°F (15.5°C and 29.5°C) when thermostat is in economy mode



Cycle Rate

6 cycles per hour

Case Material

Flame retardant, high impact plastic, white


3.5”W x 5.0”H x 1.5”D

Setpoint Range

60.0°F to 85.0°F (15.5°C to 29.5°C)


72.0°F (22.0°C)

Comfort Limits

65.0°F (18.5°C) cooling 85.0°F (29.5°C) heating

Display Format

Liquid Crystal Display (LCD)

Sampling Rate

Every 5 seconds

Fan Control

Selectable: Auto cycle, Low, High, Economy, Off

Heat/Cool Control

1 Compressor, 1 Auxiliary Heat

Fan Purge Timer

30 seconds

Anti-Short Cycle

3 minute hold in no call state at all times