The  EPU and EPU-CH are outdoor/indoor heating controls for steam heated buildings. They effectively regulate the ambient indoor temperatures according to outdoor temperature.The heating system is shut down when the outdoor temperature rises above an adjustable set point. A built-in program clock allows the control to hold lower temperatures during the night or when the building is not occupied. An adjustable morning warm-up is also included.

The EPU and EPU-CH run on the cycle concept. The cycle concept causes the heating plant to run longer as outdoor temperatures fall. This means as outdoor temperatures fall,more heat enters the building, and the ambient indoor temperatures remain constant and comfortable.

• Automatically cycles boiler operation based on outdoor temperature.
• A reliable, easily installed, "Weatherhead". This sensor monitors outdoor temperature and can be run up to 500' from the panel. 
• A heating system sensor to signal the panel that heat has been circulated to all parts of the building. This sensor is strapped onto a system return pipe and can be run up to 500' from the panel.
  • Time clock to provide three different heat levels:
  • Day or Normal heat levels for when the building is occupied or tenants are active
  • Night or Save heat levels for when the building is empty or for when tenants are sleeping
  • Morning Warm up to quickly return the building to comfortable heat levels after Night or Save period
• Separate Day and Night outdoor temperature cutoff set points
• Separate Day and Night heat adjustments
• Easy to read lights show what the status of the panel is at all times

Heat-Cycle Chart

The table indicates the number of minutes within the hour that the cycle will be On (Boiler On)