Hired-Hand Farm Hand Series: Swine Finisher - Manual (Page 13)

Part No. 4801-0150 Rev 8-04 Farm Hand Swine Finisher 5 Stage 13 of 32
inlet is open. If there is no error condition, the controller will begin waiting for
the main curtain to close. If the controller does not see the main curtain closed
after 7 more minutes, it will abort tunneling, and sound the alarm. Once the
controller recognizes that the main curtain is closed, it will then allow the other
cool tunnel and cool negative tunnel stages to come on. Once the temperature
drops below the Tunnel OffPoint (P25), the controller will open both the inlet
and the main curtain fully and return the stages to normal operation
immediately.
Tunneling on outside temperature in a power ventilated building
The controller reacts in the same way as in the naturally ventilated building. For
proper operation in a house without a curtain sidewall, you must jumper the
curtain closed switches on the main curtain together.
Tunneling on a stage in a power ventilated building
As soon as the lowest programmed Cool Tunnel stage comes on, the controller
opens the inlet curtain and leaves all Cool Negative Tunnel and Cool Tunnel
stages on. When the temperature begins to fall and the lowest programmed Cool
Tunnel stage turns off, the controller will close the inlet fully and return the
stages to normal operation immediately.
Note: If you are using a main sidewall curtain, it must run at a speed where it
can go from fully open to fully closed in less than 13 minutes.
Otherwise, the controller will not operate tunnel properly.
9.3 Cool Timer Stage Operation
On all Swine Finishers, all stages can be programmed as cool timer stages. A cool timer stage
will come on and run at the timer percentage whenever temperature is above it’s off point, and its
timer percentage will increase as temperature rises. The following graph shows how you can vary
this percentage.
Minimum On Point
Minimum Time
Maximum On Point
Maximum Time
Temperature (F)
Percent of
Timer Duration
(%)
40
100
75 78 81
70
The above graph shows how the timer percentage of the fan will increase with the following
settings:
Setting Parameter Setpoint
Sensors P1 - Stage Sensors Any Combination
Timer Setting P3 - Timer Selection 2 - Cool Timer
Maximum On Point P4 - On Point 81
°F
Minimum On Point P5 - Off Point 75
°F
Minimum Percentage Minimum Runtime Percent 40%