Friedrich RT4 - Manual (Page 4)

2
Specifications
Input:
• Voltage: 18-30 VAC
Output:
• Maximum: 1 amp per terminal (3 amp total for all terminals)
Temperature Ranges:
• Temperature control range: 45°F to 90°F (7°C to 32°C) Accuracy: ± 1°F (± 0.5°C)
• Differential range: 1°F to 3°F (0.5°C to 1.5°C) Accuracy: ± 1°F (± 0.5°C)
• System configurations: Single stage heat pump
• Terminations: R, C, W, Y, B, O, G
• Note: This thermostat is designed for: Single stage electric
heating, heating/cooling systems and heat pump
systems. It will retain your setpoint temperatures in
memory for up to 30 minutes during a power outage.
SET
ROOM
DIFF Temperature
differential setting
Room temperature
Room temperature
setpoint
Important Safety Information
• Always turn off the thermostat before installing, removing, cleaning, or servicing; turn off the power at the main
power source by unscrewing fuse or switching off circuit breaker
• Do not switch to “Cool” if outside temperature is below 50°F (10°C), this could damage your A/C system and cause
injury
• Do not install on voltages higher than 30 VAC
• All wiring must conform to local and national building and electrical codes and ordinances
• While cleaning, do not get soap directly on thermostat switches or LCD readout; only use a damp cloth with a mild
soap to wipe the outside of the thermostat cover