Hired-Hand System 500 Power Curtain Controller - Manual (Page 14)

System 500™ Power Curtain™ Controller 12
If the Target Temp is set at 80 degrees, Offset at 4 degrees and Differential set at 2
degrees, The System will disengage Heat Mode when building temperature reaches 76
degrees.
Target Temp - Offset = Heat Mode Off
80 - 4 = 76
Cool Mode:
If the Target Temp is set at 80 degrees, Offset set at 5 degrees, and Differential set at 2
degrees, The System will engage the fans when building temperature reaches 87
degrees.
Target Temp + Offset + Differential = Cool Mode On
80 + 5 + 2 = 87
If the Target Temp is set at 80 degrees, Offset set at 5 degrees, and Differential set at 2
degrees, The System will disengage the fans when building temperature reaches 85
degrees.
Target Temp + Offset = Cool Mode Off
80 + 5 = 85
The stages offset and differential are determined by the program you have
selected with the program bank, and stages switches on the inside of the
controller. A list of all the stage programs is printed at the back of this manual.
8. Maintenance
There are few items on the System 500™ which require maintenance. This does not mean that
maintenance is not important. Check the calibration of your sensors at least once every two months.
9. Wiring Diagrams
Recommended Wiring for LOW VOLTAGE hookup.
Component HHI Wiring Part No. Recommended Wire
Sensor 1502-2427 18/2 Shielded Cable
Hall Effect Devices 1502-2427 18/2 Shielded Cable
PVR-H 1503-1508 18/3 Cable SJT