Hired-Hand Electro Mechanical Controls (Relay-Switches): PC-DB Curtain Controller with Timer Override - Manual (Page 4)

4801-1208 PC-DB-with Timer Override 3
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The wheel on the right is the open wheel. As this wheel rotates, the
tabs attached to this wheel will control the opening of the machine.
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The wheel on the left is the close wheel. As this wheel rotates, the tabs
attached to this wheel will control the closing of the machine.
5.1.2. Setting machine runtime
Tabs may be attached to the timer wheels on either side. A tab attached to the right hand
side of either wheel is the “ON” tab. As this tab strikes the switch, it will provide a path
for current to operate the relay that will open or close the machine. However, a tab
attached to the left hand side of either wheel is the “OFF” tab. As this tab moves past the
switch, it will shut off the path for current that was opened by the “ON” tab.
It is important that when adjusting the tab positions, that you keep the tabs on the open
wheel at 180º to the tabs on the close wheel. This is to prevent the curtain from rapidly
switching directions. This is important especially when using a curtain machine other
than one designed by Hired-Hand.
You may place two or three sets of tabs on the wheels if you would like. This will allow
you to run the machine in shorter time increments, but more often.
To increase the factory set runtime, place the off tab farther along the same wheel.
Remember that a whole revolution of the wheel is five minutes. Shortening the span
between the tabs decreases the runtime, and widening the gap between tabs increases the
runtime.
5.2. Override Timer
5.2.1. Description
This controller has a timer
operated override that will
close the curtains at any time
you select on the timer.
The picture on the left shows
the timer that is installed on the
left hand side of the controller
face. The timer is a 24 hour
timer that has switches
(trippers) that represent fifteen
minute intervals.
At any time you want the curtains or vents to be closed, you slide the tripper that
corresponds to the time on the dial to the outer position.
When the timer reaches that position, the controller will close the curtains and override
the controller. Any time the switches are in the inner position (automatic position) the
controller will work in the normal fashion.
The timer has a manual override switch that can be used to set the timer as automatic,
permanently on, or permanently off. This switch is pointed out in the picture above.