HTP EL-80 - Cascade Master Pump and Sensor Wiring; Cascade Follower Pump and Sensor Wiring

LP-293 Rev. 9.24.15
36
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
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
Figure 25 - Cascade Master and Follower Wiring
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 specic boiler.