LP-387 Rev. 7.3.15
41
M. Cascade Master Pump and Sensor Wiring
1. Connect the system pump hot wire to the terminal marked
8.
2. Connect the system pump neutral to the 2 terminal and the
pump ground wire to the 3 terminal.
3. Connect a jumper wire from the 120 VOLT terminal to the 9
terminal.
4. Connect the boiler pump to the terminals marked 1 (HOT),
2 (NEUT) and 3 (GND).
5. Connect system pipe sensor to terminals marked 10 and 11.
N. Cascade Follower Pump and Sensor Wiring
Figure 32 - Cascade Master and Follower Wiring
5. Connect the boilers in a daisy chain conguration as shown
below. It is best to wire the boilers using the shortest wire
runs rather than trying to wire them in the order that they
are addressed. The communication bus jacks on the customer
connection panel are interchangeable so you can use either
one or both in any order to connect the cable.
If you have connected the boilers to each other properly, there
will be no open communication connection ports.
1. Connect the boiler pump to the terminals labeled 1 (HOT), 2
(NEUT), and 3 (GND).
2. 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 o 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 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 o during a boiler
lockout condition, follow the same instructions as above except
use the ALARM NC terminal rather than the ALARM NC terminal.
Note that 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 as 2-7
will only activate an alarm if a lockout condition occurs on that
specic boiler.
See Figure 32 for Cascade Master and Follower Wiring detail.
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