Hired-Hand Farm Hand Series: Vent Master 16 Stage - Manual (Page 13)

Part No. 4801-5098 Farm Hand Vent Master 10
9.2.2 Stage Mode (P2)
The Farm Hand Vent Master is a very intelligent controller, therefore, it needs to not only know
whether this is a heating or cooling stage but also what type of cooling stage. This feature allows
the grower to program the cooling stages to work exactly like he wants them to without the
expense of hard wiring through relays and limit switches. This feature allows the Farm Hand
Vent Master to better react to the environment. Any Stage can be programmed to be one of the
following:
1 = Heat
This mode allows the equipment to operate when room temperature is
below the OnPoint for the stage.
2 = Cool Stir
This mode setting is for cool stages that stir inside sir. This stage will
not run during tunnel mode.
3 = Cool Negative
This mode setting is primarily for negative cross ventilation fans. This
stage will not run during tunnel mode.
4 = Cool Negative Tunnel
This mode setting works exactly like the Cool Negative setting except it
will run if the controller goes into tunnel mode. This stage is sometimes
referred to as a transitional stage. In other words, it operates before it
goes into tunnel and also during tunnel.
5 = Cool Tunnel
This mode setting only works when the controller is in tunnel mode.
9.2.3 Stage Timer Settings (P3)
The Farm Hand Vent Master is equipped to satisfy any of your minimum ventilation
needs for regular runtime timers, to cool timers, to progressive timers.
00 = No Timer
Select 0 for the timer setting if you do not want the stage to be on a
timer.
01 = Runtime Timers
Any one of the On/Off stages can be placed on the system timer by
placing a "1" in parameter 3 (P3) of the stage. By doing this the stage
will operate off of the system timer while the temperature is below the
stage's OnPoint. Once the temperature reaches the stage OnPoint, the
stage will come on full time.
02 = Cool Timers
On/Off Stages
Any one of the On/Off Stages can be placed on a cool timer.
By doing this the stage will operate off the system timer only while the
temperature is above the stage OffPoint (OFF). Refer to Section 12.4
"Cool Timer Stage Operation" for proper setup.
Variable Stages
Any of the variable stages can be placed on a cool timer. By doing this
the stage will be placed on the system timer all the time. It will run full
speed for a certain percentage of time that is set in Var Timer/PCT.
This percentage will progressively increase as the temperature rises