Install Instructions

3
Boiler manufacturer schematics should be followed. In
the event that the boiler manufacturer's schematic does
not exist, or is not available from the boiler manufacturer,
refer to the schematics provided in this document.
IMPORTANT
To prevent electrical shock, turn off the
electrical power before making electrical
connections.
Failure to follow this warning could cause
property damage, personal injury or death.
WARNING
Terminal Connections
N
P
M
For all wire connections to the terminal block (M).
1. Strip about 1/3" (8.5 mm) of insulation from the wire.
2. Loosen the terminal screw (N) but DO NOT
REMOVE. Move the wire clamping plate (P) back
until the plate touches the back side of the screw head.
3. Insert the stripped end of the wire under the wire
clamping plate (P) and securely tighten the
terminal screw (N).
Do not use automatic water feeders with manual reset
LWCO's. Failure to follow this warning could cause
flooding, property damage, personal injury or death.
WARNING
Unless otherwise noted, water feeder voltage should be
the same as the LWCO and burner circuit voltage.
NOTE
Before wiring water feeder, operate boiler and check all
safety devices.
NOTE
Wire must be 18 AWG (min) or as required by local code.
Wire insulation rating must be at least 167˚F (75˚C)
NOTE
STEP 2 - Electrical Installation
Feeder Model LWCO Model Diagram Number Page
WFE-24 PS-802 with burner wiring harness 1 4
WFE-24 PS-802 with burner terminal connections 1 4
WFE-24 67 w/24 volt burner circuit 4 4
WFE-24 67 w/120 volt burner circuit 6 4
WFE-24 67G (millivolt burner circuit) 9 5
WFE-120 PS-801 with numbered terminals 2 4
WFE-120 PS-801 with lettered terminals 3 4
WFE-120 67 w/24 volt burner circuit 7 4
WFE-120 67 w/120 volt burner circuit 5 4
WFE-120 67G (millivolt burner circuit) 8 5
WFE-24 Hydrolevel 400 10 5
WFE-24 Hydrolevel CG400 11 5
WFE-120 Hydrolevel 450 12 5
WFE-120 Hydrolevel CG450 13 5
WFE-120 Hydrolevel CGT450 14 6
WFE-24 Honeywell LWCO (24 volt) 15 6
WFE-120 Honeywell LWCO (120 volt) 16 6
WFE-24 TACO LWCO (24 volt) 18 6
WFE-120 TACO LWCO (120 volt) 17 6
Wiring Diagram Selection Chart
Based on the water feeder and low water cut-off combination you are installing, select proper wiring
diagram and proceed to that page.