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.
Summary of Contents for Mod Con 300 HL
Page 13: ...13 Figure 2 ...
Page 31: ...31 Figure 13 ...
Page 37: ...37 J SIDEWALL VENTING DIAGRAMS Figure 16 Sidewall Venting with Tee and Coupling ...
Page 38: ...38 Figure 17 Sidewall Venting Diagrams ...
Page 39: ...39 K VERTICAL VENTING DIAGRAMS Figure 18 Two Pipe Roof Venting with Tee and Coupling ...
Page 40: ...40 Figure 19 Roof and Sidewall Venting with Stainless Steel ...
Page 44: ...44 E GAS VALVE Figure 21 ...
Page 45: ...45 Figure 22 ...
Page 55: ...55 Figure 28 Mod Con Internal Connection Diagram ...
Page 73: ...73 Figure 32 ...
Page 74: ...74 Figure 33 ...
Page 75: ...75 Figure 34 ...
Page 76: ...76 Figure 35 ...
Page 77: ...77 Figure 36 ...
Page 80: ...80 ...
Page 81: ...81 ...
Page 82: ...82 MAINTENANCE NOTES ...
