Installation Manual

Master Valve / Pump Relay Installation
GDC provide switch terminals to control a master valve or a pump relay if the system requires it.
Step 1 – Place the controller’s power switch to OFF.
Step 2 – Connect the Positive/Hot wire of the power source that controls the master valve or the pump relay to the Master
valve/Pump relay switch terminal. See
Figure 6.
Step 3 – Route another wire from the Master Valve / Pump terminal and connect it to the master valve solenoid or pump
relay.
Step 4 – Connect the Negative/Equipment ground wire of the power source to the master valve solenoid or pump relay.
Step 5 – Place the controller’s switch to ON.
Pressure Sensor Installation
The GDC 200 controller is designed to accept a normally-closed pressure sensor.
Step 1 – Place the controller’s power switch to OFF.
Step 2 – Route the pressure sensor’s cable into the controller.
Step 3 – Connect the cable wires to the Pressure Sensor Terminals (See Figure 6).
Step 4 – Place the controller’s switch to ON.
Rain Sensor Installation
The GDC 200 controller is designed to accept a normally-open rain switch.
Step 1 – Place the controller’s power switch to OFF.
Step 2 – Route the rain sensor’s cable into the controller.
Step 3 – Connect the cable wires to the Rain Sensor Terminals (See Figure 6).
Step 4 – Place the controller’s switch to ON.
Toro Maintenance Remote (TMR) Receiver Plug Installation
The GDC 200 controller is fully ccompatible with the TMR remote.
See TMR’s User’s Guide for operating and mounting instructions.
Step 1 – Place the controller’s power switch to OFF.
Step 2 – Route the TMR’s receiver plug cable into the controller.
Step 3 – Connect the RJ45 plug into the socket shown in Figure 6.
Step 4 – Connect the power wires into the 28 VAC terminals labeled A in Figure 6.
Step 5 – Place the controller’s switch to ON.
A
A
Figure 6
Master Valve / Pump Relay
Switch Terminals
Rain Sensor
Terminals
Pressure Sensor
Terminals
Rain Sensor
Master valve
or
Pump Relay
Pressure Sensor
24-Volts Transformer
(Voltage Source must
not exceed 3 Amps
Max, 28 Volts Max)
Toro
Maintenance
Remote (TMR)
Receiver Plug
The 28VAC (Label A) can
also be used to power the
Toro Wireless Rain Sensor
(TWRS/TWRFS) receiver.