WHL-033 Rev. 1.29.16
35
Q. Cascade Follower Pump and Sensor Wiring
1. If it is desired to have the boiler control the boiler pump,
connect the boiler pump to the BOILER HOT, BOILER NEUT,
and BOILER GND terminals.
2. If you are using an indirect fired water tank connected
directly to the follower boiler, connect the pump for it to the
DHW HOT, DHW NEUT, and DHW GND terminals.
If desired, an alarm bell or light can be connected to the alarm
contacts of the follower boiler. The normally closed alarm
contact may be used to turn a device off if the boiler goes into
lockout mode. The alarm contacts are rated 5 amps at 120
VAC.
To connect an alarm device, connect the power for the device
Figure 26 - Cascade Master and Follower Wiring
to the ALARM COM terminal. Connect the alarm device hot wire
to the ALARM NO terminal. Connect the neutral or return of the
alarm device to the neutral or return of the power for the alarm
device.
To connect a device that should be powered off during a boiler
lockout condition, follow the same instructions as above and use
the ALARM NC terminal rather than the ALARM NO terminal.
NOTE:
In a cascade system, the alarm output of the boiler
addressed as #1 will also be active if the master boiler has a
lockout condition. The alarm output of boilers addressed #2-7
will only sound if a lockout condition occurs on that specific
boiler.
Summary of Contents for WBMC**500
Page 36: ...WHL 033 Rev 1 29 16 36 Figure 27 Internal Connection Diagram ...
Page 59: ...WHL 033 Rev 1 29 16 59 Figure 32 500 Combustion System Replacement Parts Model ...
Page 60: ...WHL 033 Rev 1 29 16 60 Figure 33 850 Combustion System Replacement Parts Model ...
Page 61: ...WHL 033 Rev 1 29 16 61 Figure 34 Water Side Replacement Parts All Models ...
Page 62: ...WHL 033 Rev 1 29 16 62 Figure 35 Cabinet Replacement Parts All Models ...
