Xylem McDonnell & Miller Uni-Match WF2 Series Instruction Manual Download Page 7

7

W N H

BURNER

1

2

3

4

NEUTRAL

24 VAC
HOT

UNI-MATCH

WATER FEEDER

WF2-U-24

SERIES 67
LOW WATER
CUT-OFF

• Connect wire from terminal 'N' of water feeder 

to 'Neutral' wire of burner circuit.

• Connect wire from terminal 'H' of water feeder 

to terminal '2' on LWCO.

• Connect jumper wire connecting terminals '2'

and '3' of LWCO.

• Connect wire from terminal 'W' of water feeder 

to terminal '4' on LWCO.

Diagram 4 WF2-U-24 / 67 with 24 volt burner circuit

W N H

BURNER

1

2

3

4

NEUTRAL

120 VAC
HOT

UNI-MATCH

WATER FEEDER

WF2-U-120

SERIES 67
LOW WATER
CUT-OFF

• Connect wire from terminal 'N' of water feeder 

to 'Neutral' wire of burner circuit.

• Connect wire from terminal 'H' of water feeder 

to terminal '2' on LWCO.

• Connect jumper wire connecting terminals '2'

and '3' of LWCO.

• Connect wire from terminal 'W' of water feeder 

to terminal '4' on LWCO.

Diagram 5 WF2-U-120 / 67 with 120 volt burner circuit

W N H

BURNER

24V

TRANSFORMER

1

2

3

4

NEUTRAL

120 VAC

120 VAC
SUPPLY

HOT

UNI-MATCH

WATER FEEDER

WF-U-24

SERIES 67
LOW WATER
CUT-OFF

• Install wire from burner circuit 'Neutral' wire to 

the transformer input 'Neutral' terminal.

• Install wire from burner circuit 'Hot' wire to the 

transformer input 'Hot' terminal.

• Install wire from transformer output 'Neutral'

terminal to terminal 'N' on the water feeder.

• Install wire from terminal 'W' on the water feeder 

to terminal '4' on the low water cut-off.

• Install wire from transformer output 'Hot' terminal 

to terminal 'H' on water feeder and terminal '3'
on low water cut-off.

NOTE: Transformer provided by others.

Diagram 6 WF2-U-24 / 67 with 120 volt burner circuit

Summary of Contents for McDonnell & Miller Uni-Match WF2 Series

Page 1: ...n this document To prevent water damage check to make sure there is adequate floor drainage capacity Check all components in the system to insure that they will not leak in the event of an overfeed co...

Page 2: ...h initiates a dwell period specific to the position of the switch If the return conden sate satisfies the low water cut off LWCO during the dwell period no water will be added to the boiler Once the d...

Page 3: ...o service control c Unit must be installed in a horizontal pipe in an upright position d Arrow on feeder must point in the direction of flow into the boiler e Install isolation valves and unions on th...

Page 4: ...ical shock turn off the electrical power before making electrical connections Failure to follow this warning could cause property damage personal injury or death WARNING Boiler manufacturer schematics...

Page 5: ...24 Hydrolevel 400 10 9 WF2 U 24 Hydrolevel CG400 11 9 WF2 U 120 Hydrolevel 450 12 9 WF2 U 120 Hydrolevel CG450 13 10 WF2 U 120 Hydrolevel CGT450 14 10 WF2 U 24 Honeywell LWCO 24 volt 15 10 WF2 U 120...

Page 6: ...1 2 3 4 5 Connect wire from terminal N of water feeder to terminal 2 on LWCO Connect wire from terminal H of water feeder to terminal 1 on LWCO Connect wire from terminal W of water feeder to terminal...

Page 7: ...on LWCO Connect jumper wire connecting terminals 2 and 3 of LWCO Connect wire from terminal W of water feeder to terminal 4 on LWCO Diagram 5 WF2 U 120 67 with 120 volt burner circuit W N H BURNER 24V...

Page 8: ...inal H on water feeder and terminal 3 on low water cut off Install wire from terminal W on the water feeder to terminal 4 on the low water cut off Diagram 8 WF2 U 120 67 with millivolt burner circuit...

Page 9: ...Factory Jumper Bar BURNER Connect wire from terminal N of water feeder to terminal 2 on LWCO Connect wire from terminal H of water feeder to terminal 1 on LWCO Connect wire from terminal W of water f...

Page 10: ...CGT450 Connect wire from terminal N of water feeder to terminal 2 on LWCO Connect wire from terminal H of water feeder to terminal 1 on LWCO Connect wire from terminal W of water feeder to terminal A...

Page 11: ...tory Installed Jumper Wire UNI MATCH WATER FEEDER MODEL WF U 120 Connect wire from terminal N of water feeder to terminal N on LWCO Connect wire from terminal H of water feeder to terminal L on LWCO C...

Page 12: ...Turn the boiler s electric power on and fill it to the manufacturer s recommended normal water level by depressing the red manual feed button Z on the water feeder X Y FEED INDICATOR MANUAL FEED U N I...

Reviews: