Hydrolevel VXT-120 V1 - Manual (Page 2)

Step
➌
– Wiring
Select the wiring diagram below that corresponds to the low water cut-off installed on the boiler. Consult boiler manufacturer’s
instructions for proper burner terminal connections.
Hydrolevel
Safgard Model 450 / CycleGard CG450 McDonnell & Miller
PS-800 Series
Float Style Control
Honeywell
Model RW-700 Guard Ring
ALTERNATE WIRING: If the power source for the low water
cut-off is separate from the burner circuit, remove the
jumper between 1 and P1, connect the red wire to A, con-
nect the black wire to the burner circuit hot and the white
wire to the burner circuit common. ALTERNATE WIRING: If the power source for the low water
cut-off is separate from the burner circuit, do not install
jumper between H and C. Connect the red wire to W, con-
nect the black wire to the burner circuit hot and the white
wire to the burner circuit common.
ALTERNATE WIRING: If you choose to wire the feeder to a
separate power source from the burner circuit, do not install
jumper between 2 and 3. Connect the red wire to 4, the
black wire to the hot side of power source and the white
wire to common. ALTERNATE WIRING: If you choose to wire the feeder to a
separate power source from the burner circuit, do not install
jumper between L1 and A. Connect the red wire to A, the
black wire to the hot side of power source and the white
wire to common.
STANDARD WIRING STANDARD WIRING
STANDARD WIRING STANDARD WIRING