Hired-Hand Electro Mechanical Controls (Relay-Switches): PC-DB Curtain Controller with Timer Override - Manual (Page 3)

4801-1208 PC-DB-with Timer Override 2
2. Physical Description
The picture on the left above is the front of the controller. The picture on the right is a picture of the
internals of the controller showing major components.
3. Use of Equipment
This Power Curtain Controller is built for use in agricultural enclosures for temperature control. The
machine will operate one PowerTrak machine in response to temperature changes. Additionally, the
controller has a timer override that will completely override the thermostat and close the curtain at
selected times, and hold the curtain closed until the selected time.
4. Installation
1. Mount unit to wall near power supply.
2. Connect nine conductor wire from PowerTrak to the terminals shown on the wiring
diagram in the back of this manual.
3. Connect thermostat to terminals as shown in the wiring diagram in the back of this
manual.
4. (Optional) Connect optional override to the terminals shown on the wiring diagram
in the back of this manual.
5. Close door and apply power to the machine.
5. Set-up Instructions
5.1. Curtain Timer
5.1.1. Description
The curtain timer is a five minute electro-mechanical timer. Look at the picture above to
get an idea of the different parts discussed in this section. This timer is very simply
designed. A constant speed motor drives the two wheels at the same speed in the same
direction. There are tabs attached to the wheels that will actuate switches on the timer
body as they pass.
Close Relay
Open Relay Terminal Connections
24V Override Relay
Curtain Timer