Noritz NCC300DV - Pump Wiring; Connecting the pump control wire; Relay connection with pumps

39
Connecting the pump control wire
1. Leave enough slack so that the pump control wires
will stay connected if the unit is removed from the
wall.
2. Remove the front cover of the heater (4 screws).
3. Cut o󰀨 the connector at the end of the pump
control wires.
4. Wire the pump control wires through the wiring
throughway and connect them to the relay for the
pump (D o not directly connect to the pump).
Voltage from these wires as the signal to close a
normally open relay through which 120VAC will be
supplied directly from a wall circuit to the pump.
5. Replace the front cover.
Pump Wiring
* This feature is not available when using the Quick
Connect Multi System feature.
Relay connection with pumps
1. Locate and prepare the pump control wires as described above.
2. Choose a suitable installation location for the relay where it will be protected from moisture.
3. Connect the pump control wires from the heater to the signal input on the relay.
4. Cut one of the electrical supply leads and wire it across the open terminals of the relay.
5. Secure all connections.
Circulation Pump
120VAC
Relay (ex. Omron G7L2ABUBJCBAC120)
Connect to Pump Control
Wires in Unit
0
1
2
4
PUMP
Crimping Terminal
Wiring
Throughway
Supplies Power for
Relay
Pump Control
Wire Tag