Hired-Hand Electro Mechanical Controls (Relay-Switches): PC-DB Curtain Controller with Timer Override - Manual (Page 6)

4801-1208 PC-DB-with Timer Override 5
4. Close control box lid, and re-apply power.
The DB in the controller name refers to the Dead-Band operation of the controller. To use the
dead-band feature you must have a two stage thermostat. This thermostat is available at your
Hired-Hand dealer. The dead-band is a three to four degree temperature band which satisfies the
controller. Any time the temperature is inside this band, the controller will not close or open the
curtain machine automatically. However, if temperature should exceed the dead-band, the
controller will operate to return temperature to the band.
To place the controller in automatic operation, select “Automatic” with the top toggle switch on
the control box.
6.3. Override
Remember that when the timer is “on”, the curtain will be closed. And whenever the timer is
“off” the curtain will run as the controller tells it to. This timer is only used to override the
controller, not to supplement it’s operation.
6.4. Optional Override
If you have a weather station, or some other system you want to automatically close the curtains,
you may do so by hooking to the machine as an optional override. This connection is normally
open, and will close whenever a 24 Volt source is applied. The connections are shown along the
terminal strip on the wiring diagram below.
7. Wiring Diagram
Below is a wiring diagram of the internals of the controller. All connections are shown, as well as
thermostat hookup.
HOOK-UP OF OPTIONAL
A-19 SINGLE STAGE
THERMOSTAT
10 11 12 13
BLACK
RED
WHITE
GREEN
OPTIONAL
5 6 7 8
TO REVERSE OPENING
AND CLOSING DIRECTIONS
SWITCH TOP WIRES ON
TERMINALS AS SHOWN
WITHOUT DEADBAND,
NOTE :
1. WIRES FROM TIMER MOTOR CONNECT
TO POSITIONS 1 & 2 ON TERMINAL BLOCK.