Hired-Hand Farm Hand Series: SC-5v2 User Manual

Page 20

Part No. 4801-5324 Rev 9-05

Farm Hand SC-5v2 5 Stage

20 of 40

9.4 Setting up a Cool Timer Stage

There are two unique parameters used in programming a Cool Timer stage in addition to the other
5 stage parameters. They are P10-P11. The following is an overview of how to program a cool
timer stage:

1. Enter Program Mode by pressing and holding the Mode button for 5 seconds until

P1 is displayed and the red light next to the stage you want to program is lit. This
parameter selects the sensor(s) that this stage watches for on/off operation.

2. Press the + or - button until the desired sensor is displayed. 1= sensor 1; 2 = sensor

2, and 3 = an average of sensors 1 and 2.

3. Press the Mode button again and P2 is shown. This parameter selects what mode the

stage operates as.

4. Press the + or - button until the desired mode is displayed.
5. Press the Mode button until P3 is displayed. This parameter allows you to put a

stage on the system timer (5 or 10 minutes).

6. Press the + or - button until a 2 is displayed.
7. Press the Mode button again and P4 is displayed. This parameter sets the Onpoint

temperature for this stage. Press the + or - button until the desired full runtime
temperature is displayed.

8. Press the Mode button again and P5 is displayed. This parameter sets the Offpoint

temperature for this stage. Press the + or - button until the desired minimum
runtime temperature is displayed.

Note: The following two steps only apply to variable speed stages being used as cool

timers.

9. Press the Mode button again and P10 is displayed. This is where you set the timer

percentage for the times when the temperature is below the offpoint of the stage. If
you want this to be a strictly cool timer set this to “0”.

10. Press the Mode button again. P11 is now displayed. This can be ignored because

the stage will no longer vary the speed.

11. Exit program mode by pressing the Mode button until PS3 has been displayed or by

waiting 1 minute.

12. Now press the Mode button until the green light next to Var/Timer Pct is lit and the

stage status indicator for the stage you are programming to be the cool timer is lit.
Press the + or - button until the desired minimum fan runtime % is displayed.

9.5 Variable Speed Fan Control

The SC-5v2 can accommodate 1 or 2 Variable Speed Fan Stages. These stages can be
programmed to either be a variable speed fan or a cool timer. The operation of the variable speed
option is explained below.

Minimum On Point
Minimum Speed

Maximum On Point
Maximum Speed

Temperature (F)

Percent of
Full Speed

(%)

100