Hired-Hand Farm Hand Series: Swine Finisher - Manual (Page 8)

Part No. 4801-0150 Rev 8-04 Farm Hand Swine Finisher 5 Stage 8 of 32
6.1.7 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.
6.2 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.
P20 -- Cycle Time
The controller looks at all parameters and decides whether or not to move the
curtains occasionally. This parameter determines how often this occurs. Valid
settings are 1 to 10 minutes.
P21 -- Run Time
When the controller determines that curtains need to run open or close, this
setting determines how long they run. Valid settings are 1 to 240 seconds.
P22 -- Initial Run Time
When the controller determines that the curtains should run open and senses that
they are closed, it uses this parameter for the ‘first’ run. This setting is used to
allow the curtains to open enough on the first run to guarantee adequate
ventilation. Valid settings are 1 to 240 seconds.
P23 -- Degrees above target for Unit 1
Generally a grower would like to give his variable speed and/or first stage fans
an opportunity to ventilate the building before starting curtains open. Thus,
when the curtains do come down, they will most likely stay down for a fair
period of time. This setting allows the user to do that. Valid settings are: 0 - 25.
P24 – Degrees above target for Unit 2
Occasionally, a grower may want one curtain sidewall to drop before the other
to try to avoid large temperature swings. This setting allows for this to happen.
Note: If you would like both curtain units to always react together, you
must set P23 = P24.
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.