Hired-Hand Farm Hand Series: Stage Master - Manual (Page 10)

Part No. 4801-0151 Rev 4-06 Farm Hand Stage Master 10 of 40
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 9.4
"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 which is set in Var Timer/PCT.
This percentage will progressively increase as the temperature rises
above the minimum OnPoint setting (OFF). Refer to Section 9.5
"Variable Speed Stage Operation" for proper setup.
6.2.4 Minimum Runtime Percentage (P10) (Variable Stages Only)
This setting is the percentage of the system timer that the variable stage will run at
minimum speed if the stage sensor's temperature is below the Minimum OnPoint (OFF)
for the stage.
6.2.5 Motor Curve (P11) (Variable Stages Only)
The controller is programmed to operate single phase or three phase fan motors at their
optimum performance levels. Select the correct motor curve parameter (P11) for your
particular application from the following table.
6.3 Curtain Parameters
This controller runs 1 or 2 curtain machines independently. No additional resources – including
external timers – are necessary. The curtain machines run off a common cycle timer and run
timer, however they can use separate sensors. The sensor selection is made via a switch located
on the inside of the front cover of the machine. This switch causes the machines to either operate
together or independently. If they are operating independently, unit 1 always uses sensor 1 and
unit 2 uses sensor 2. A brief overview of the programmable parameters for the curtain machines
follows:
Note: Parameters P20-P24 are only used when using the main curtain to
naturally ventilate the building.
Curve Conditions
0 This curve is optimized for use with Hired Hand’s line of Funnel Flow Fans that are 24” or less. Also, line
voltage must be Single Phase.
1 This curve lends itself better to operation of 36” fans. The power distributed at each percentage is somewhat
greater than that of curve 0. Therefore, the speed will be a little greater than that of curve 0
2 This curve is for 3-Phase systems. Its purpose is to shift the voltage curve to give a much higher power from
the varied phase. Conditions that would warrant the use of this curve is a variable speed fan that varies a great
deal from 100% speed to 95% speed.
3 This curve is for 3-Phase systems. Its purpose is to shift the voltage curve to give much less power from the
varied phase. Conditions that would warrant the use of this curve is a variable speed fan that varies very little
from 100% speed to 5% speed.
4 This curve is for use with Hired-Hand’s newest Emerson fan motor. These motors are typically used on fans
that are 24” or smaller.