Hired-Hand Farm Hand Series: SCS w/Back-Up - Manual (Page 11)

Part No. 4801-5117 Rev. 8-01 Farm Hand SCS 9
12. Day-to-Day Back-Up Operating Instructions
12.1 Toggle Sequence of Mode Button
Continuously pressing the Mode button cycles the display through the parameter sequence as
illustrated below. The parameter data is shown in the display.
12.2 Checking/Adjusting Temperatures, and Settings
When you press the Mode button, watch the green LED’s beside the main display. Whichever LED is
lit is the parameter you are viewing: “Room Temp”, “High Limit”, and “Low Limit” values.
Note: To adjust these parameters, press the Mode button until you see the parameter you want to
adjust, then use the + button to increase the value, and the - button to decrease the value.
Room Temperature
The average of the sensors located inside the house, or the temperatures of sensors 1 and 2
alternately displayed in the main display if sensor 2 is enabled.
High Limit
The temperature inside the house at which the controller will turn on the first SCS™ Back-
Up cooling stage.
Low Limit
The temperature inside the house at which the controller will turn on the first SCS™ heating
stage.
13. Set Limits
The Farm Hand SCS™ Back-Up System requires setting of a High Limit and a Low Limit at which
cool/heat stages will turn on. To determine where to set the High Limit and the Low Limit, first
decide on a target temperature of the house. This is usually the target temperature of the primary
controller. Then set the High Limit to a temperature several degrees above the desired target
temperature. Set the Low Limit to a temperature several degrees below the desired target temperature.
Note: It is recommended that the High Limit be at least 10º above the room’s target
temperature and that the Low Limit be 10º below the room’s target temperature.
Set High Limit
To set High Limit:
1.
Press the “Mode” button to select the High Limit Indicator.
Display LEDs
Display
Room Temp High Limit Low Limit