Hired-Hand Farm Hand Series: POWER VENT INLET - Manual (Page 6)

Part No. 4801-0149 Rev 1-01 Farm Hand Power Vent 4
As you can see from the English graph, if outside temperature is 50°F, the controller will try to maintain a
static pressure between 0.08, and 0.1”w.c. If pressure goes above 0.1”w.c., the vent machine will open, and
reduce static pressure, and if pressure goes below 0.08”w.c., the vent machine will close, increasing the
static pressure.
8. Set up/Programming
8.1. Facepad Descriptions
8.1.1. Display Screen
This section includes the main display, and four green LED’s which tell what the display
is indicating. When you press the mode button, you step through these four parameters.
30
25
20
15
10
5
Temp (°C)
Negat
ive Pre
ss
u
re
(Pa)
0 5 10 15 20 25 30 35
Above Target Pressure
Vent Machine Opens
Below Target Pressure
Vent Machine Closes
Acceptable Target
Pressure
No Machine
Operation
35
0
Temp (°F)
N
e
g
a
tiv
e
Pr
es
su
re
(“
w
.c
.)
0.12
0.10
0.08
0.06
0.04
0.02
0
10 20 30 40 50 60 70 80 90 100
Above Target Pressure
Vent Machine Opens
Below Target Pressure
Vent Machine Closes
Acceptable Target
Pressure
No Machine
Operation
0.14
English Units Example Metric Units Example
Using values from the English chart above; the
controller was programmed as follows:
P30 = Ramping Mode ON
P31 = High Temperature Limit 80°F
P32 = High Temperature High Pressure .04"w.c.
P33 = High Temperature Low Pressure
.02”w.c.
P34 = Low Temperature Limit 40°F
P35 = Low Temperature High Pressure .12"w.c.
P36 = Low Temperature Low Pressure .10”w.c.
Using values from the Metric chart above; the
controller was programmed as follows:
P30 = Ramping Mode
ON
P31 = High Temperature Limit 25°C
P32 = High Temperature High Pressure 10 Pa
P33 = High Temperature Low Pressure
5 Pa
P34 = Low Temperature Limit 10°C
P35 = Low Temperature High Pressure 30 Pa
P36 = Low Temperature Low Pressure 25 Pa