Hired-Hand Farm Hand Series: Vent Master 24 - Manual (Page 15)

Part No. 4801-5124 rev 10-03 Farm Hand Vent Master 24 13
10. Rarely Changed Settings
Settings which are rarely, or never, changed are found on two banks of switches located inside the
front panel of the controller. The left hand bank of switches is for Tunnel Control, and the right hand
bank of switches controls the status of the controller. When a switch is up it is ON, when a switch is
down it is OFF. The functions of the switches are as follows:
Tunnel Switches
SWX 1 - Tunnel On/Off
This switch is used to enable or disable the tunnel mode of the controller.
When this switch is in the OFF position, the controller will not go into
tunnel for any reason.
SWX 2 - Tunnel On Stage
This switch tells the controller whether it is tunneling off of the lowest
programmed tunnel stage or if it is tunneling off of outside temperature. If
this switch is OFF, the controller will use the “Tunnel On Point” setting for
entry into tunnel.
SWX 4 – Split Target Pressures
If SWX 4 is OFF the Target Pressure will be used for both the Vent and
Tunnel machines. If SWX 4 is ON the controller will use the Target
Pressure for the Vent machine and the Tunnel Target Pressure (P22) for the
Tunnel machine.
Status Switches
SWX 1 - Lock
This switch is used to lock the controller. When it is on, the user may
change settings such as target temperature and minimum speed/timer
percentages but they can not change the settings in program mode. If the
switch is set to ON the program settings are locked.
SWX 2 – English/Metric Units
This switch toggles between the use of English or Metric units. For
English, the temperatures are displayed in Fahrenheit and the pressure is
displayed in inches of water column (“ w.c.). For Metric units, the
temperature is displayed in Celsius and the pressure is displayed in Pascals
or millimeters of water (mm H
2
O) depending on the setting of SWX 6.
(Note: If SWX 2 is changed, you will have to reset your tunnel on points
and OffPoints and your target temperature.)
HIRED-HAND R
Farm Hand Vent Master 24
Tunnel Switch Bank
Status Switch Bank