Hired-Hand Farm Hand Series: Vent Master 16 Stage - Manual (Page 38)

Part No. 4801-5098 Farm Hand Vent Master 35
timer fans turn on. If this pressure surge is not sensed within
the timer period you specify, the controller will signal your
alarm system, thus triggering an alarm. The setting is for time
in minutes, and setting the value of this limit to 0 (zero)
prevents the alarm from sounding.
P70 = Cool Timer
Maximum Percentage
This sets the maximum Runtime percentage that a cool timer
stage can operate.
P71 = Cool Timer
Minimum
Percentage
This sets the minimum Runtime percentage that a cool timer
stage can operate.
PS1 - Calibrate Sensor 1 The temperature the controller reads from the sensor. This
setting is used only when calibrating sensors. Press the +
and/or - buttons until the correct reading is seen in the main
display. (See Sensor Calibration)
PS2 -- Calibrate Sensor 2 Same instructions as sensor PS1
PS3 -- Calibrate Sensor 3 Same instructions as sensor PS1
PS4 -- Calibrate Sensor 4 Same instructions as sensor PS1
Tunnel Switches (Located inside the Controller Door)
SWX 1 - Tunnel On/Off Enables/Disables tunnel mode. When this switch is in the
OFF position, the controller will not go into tunnel for any
reason.
SWX 2 - Tunnel On Stage Option to have the controller go into tunnel whenever the first
tunnel stage turns on. If this switch is OFF, the controller will
use the “Tunnel OnPoint” 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 (Located inside the Controller Door)
SWX 1 - Lock Locks the front panel to protect your settings from accidental
change. 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
OnPoints and OffPoints and your Target Temperature.)