Hired-Hand Farm Hand Series: Vent Master 16 Stage - Manual (Page 37)

Part No. 4801-5098 Farm Hand Vent Master 34
P21 -- Static Pressure
Differential
The range over which the Target Pressure will be maintained.
P22 -- Tunnel Target
Pressure
In tunnel mode, this is the Target Pressure that will be
maintained if and only if SWX 4 of the Tunnel Switches is
ON.
P25 – Tunnel OnPoint The temperature at which the controller will go into tunnel
mode.
P26 -- Tunnel OffPoint The temperature at which the controller will go out of tunnel
mode.
P30 – Ramping Mode
On/Off
Ramping mode may be turned on or off. If you choose an
“OFF”, you will not see settings P31 through P35. However, if
you choose an “ON” with the plus or minus button, you turn
ramping on, and will have to set the following items. See
Section 7 on ramping for more information about this feature.
P31 – High Temperature
Limit
The outside temperature the controller will use in determining
the low range of its limits.
P32 – High Temperature –
Target Pressure
The upper limit for pressure when outside temperature is at the
high temperature limit.
P34 – Low Temperature
Target Pressure
The outside temperature the controller will use in determining
the high range of its limits.
P35 – Low Temperature –
High Pressure Setpoint
The upper limit for pressure when outside temperature is at the
low temperature limit.
P40 - HHNet Address Unique setting for controllers along a single network wire
pair. Only used with the PC compatibility feature using Hired-
Hand’s Farm Manager software.
P41 -- Version Number This is the version of the code for the controller. This value is
not settable.
P42 -- Controller Type This is a number that identifies the type of controller (Vent
Master) to the Farm Manager Software (PC compatible)
P60 – Low Pressure
Alarm
The Low Pressure alarm will send a signal when pressure
drops below the low pressure setpoint for greater than 45
seconds. This alarm warns if the vents failed to close for
some reason. Setting the Low Pressure alarm setpoint to 0
(zero) prevents the alarm from sounding.
P61 – High Pressure
Alarm
The High Pressure alarm will send a signal to your existing
alarm system in the same manner as the High Pressure alarm,
but only when pressure exceeds the High Pressure Setpoint for
greater than 45 seconds. (High Negative Pressure.) This alarm
warns if the vents did not open for some reason. Setting the
alarm setpoint to 0.20 prevents the alarm from sounding.
P63 – Cycle Pressure
Alarm
The cycle alarm is a very important alarm in that it will warn
if your timer fans failed to operate. The controller will look
for a pressure surge that would normally be caused when the