Hired-Hand Farm Hand Series: Stage Master - Manual (Page 6)

Part No. 4801-0151 Rev 4-06 Farm Hand Stage Master 6 of 40
Var/Timer Percentage
The Var/Timer percentage parameter can be used to set variable speed and/or runtime
percentage depending on the model of the Farm Hand Stage Master.
Variable Speed refers to the increase or decrease of fan speed as regulated by the controller
based on temperature. For example, a Var/Timer Pct. set to 50 means that a fan will run at
50% of its maximum speed at a particular temperature.
Runtime percentage refers to the percentage of the timer cycle that a stage on a timer will
run. For example, if the Var/Timer Pct. is set for 30, and your timer cycle is set for 10
minutes, the timed stages will run for 3 minutes out of every 10 minutes (i.e. 30% of the
timer cycle).
There are two models of the Farm Hand Stage Master Controller. On the Non-variable
speed model, this setting refers to the Runtime percentage for any of the stages that are on
the system timer. On the Variable speed model, this setting is used to set the minimum
speed for stages 1 & 2 and also the Runtime percentage for any of the remaining ON/OFF
stages that are on the system timer. Please note your model. You can determine the model
by comparing the main display sequence to that described in the following diagrams.
Non-variable Speed Model - (Runtime Percentage)
The Var/Timer Pct. parameter sets the Runtime percentage of all stages that are placed on a
timer (See Section 9.2). The value of the Var/Timer Pct. in the main display refers to a
Runtime % which can be set to values between 0 and 100 using the "+" and "-" buttons.
When you step through the main display parameters, notice the stage status indicators. As
the Mode button is pressed, a Var/Timer Pct. value will appear in the main display, and
stages affected by this setting will have stage status indicators lit.
Variable Speed Model - (Minimum Speed %)
On the variable speed model, this setting allows you to program three parameters: the
Minimum speed % for stage 1, the Minimum speed % for stage 2, and the Runtime % for
the remaining ON/OFF stages. If using the variable stages as progressive cool timer
stages, this setting becomes the Minimum runtime % instead of the Minimum speed %.
(Refer to Section 9.5.2 for more discussion on this option).
As you step through the main display and you get to the Var/Timer Pct. setting, notice
the stage status indicators. These indicators show which setting you are programming.
The Var/Timer Pct setting is displayed as shown in the following diagram.
Non-variable Speed Model
(Parameter selection sequence)