52
Figure 25
O. CASCADE MASTER PUMP AND SENSOR WIRING
1. Place the cascade master overlay sticker onto the field connection board on the boiler designated as
the cascade master.
2. Connect the system pump hot wire to the terminal marked SYS PUMP.
3. Connect the system pump neutral to the BOILER NEUT terminal and the pump ground wire to the
BOILER GND terminal.
4. Connect a jumper wire from the 120 VOLT terminal to the SYS PUMP PWR terminal.
5. Connect the boiler pump to the terminals marked BOILER HOT, BOILER NEUT, and BOILER GND.
6. Connect the system pipe sensor to the terminals marked SYS SENSOR.
7. Connect the outdoor sensor (if used) to the terminals marked OUTDOOR SEN.
8. Connect the signal to start the system to the terminals marked THERMOSTAT.
NOTE: This signal can come from a room thermostat or a dry contact closure. No power of any voltage
should be fed into either of these terminals.
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