Hired-Hand Farm Hand Series: Swine Finisher - Manual (Page 15)

Part No. 4801-0150 Rev 8-04 Farm Hand Swine Finisher 5 Stage 15 of 32
9.5 Variable Speed Fan Control
Depending upon the model of Swine Finisher you have, you have either 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
(%)
40
100
75 78 81
70
The above graph shows how the speed of the fan will increase with the following settings:
Setting Parameter Setpoint
Sensors P1 - Stage Sensors Any Combination
Timer Setting P3 - Timer Selection 0 - Not on Timer
Maximum On Point P4 - On Point 81
°F
Minimum On Point P5 - Off Point 75
°F
From the graph, you can see that at 78
°F, the variable speed fan will run at 70% of maximum
speed. Below 75
°F the variable speed fan will run at its minimum speed, for the minimum timer
percentage (P-10). Above 81
°F the variable speed fan will run at 100% continuously.
If you want to use the cool timer option for these two stages, refer to the section “Setting up a
Cool Timer Stage”.
9.6 Setting Up a Variable Speed Fan
There are two unique Parameters used in programming a variable speed fan, in addition to the
other five stage programming parameters. They are P10-P11. The following is an overview of
how to program a variable speed fan:
1. Enter Program Mode by pressing and holding the Mode button for 5 seconds until
P1 is displayed if the red light next to the stage you want to program is not lit, press
the mode button repeatedly until that light 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 0 is displayed.