Install Instructions

5
N H
B C
(L1)
BLACK
YELLOW
WHITE
YELLOW
120VAC
SERVICE
SWITCH
NH
(L2)
Boiler Control
Connections
The control can be wired this way if the total amp
load of the boiler does not exceed 5.8 amps @
120 VAC when the boiler is running. If the total
amp load exceeds 5.8 amps @ 120 VAC when
the boiler is running, the control should be wired
as shown in Option 2.
Using the boiler Service Switch as a reference,
connect wires as shown. Use wire nuts (not
furnished) to complete connections.
• Connect White (N) wire as shown to 120VAC
circuit neutral wire.
• Connect Black (H) wire and Yellow (C) wire as
shown to 120VAC circuit hot wire from Service
Switch.
• Connect Yellow (B) wire as shown to L1
connection on boiler control panel.
(Follow the procedure below or on page 6, as appropriate for your application)
Option 1:
This diagram can be used if you are wiring the RB-122-E to interrupt ALL
power to the boiler when a low water condition occurs.
Proceed to page 7, Step C.