Xylem MM 414B Series 150E and 157E Low Water Cut-Off/Pump Controllers For Steam Boilers and Other Level Control Applications - Manual (Page 9)

9
Screws
Plate Ground
Blue/Top
Yellow/Middle
Red/Bottom
Connect wires between Control Box and Probes
as follows.
Probes Control
Top/Blue Top/Blue
Middle/Yellow Middle/Yellow
Bottom/Red Bottom/Red
Plate Ground Chassis Ground
• Attach cover plate to probe housing.
• Use knockout plug from probe housing to plug
the hole in the cover plate.
• Proceed to Electrical Wiring Section to complete
wiring to Burner and Pump/Valve circuits.
Wire connections at Probes (1/4” Ring Terminal) and
Control Panel (22-18 Female Spade) must be made
with connectors suitable for high temperature (200˚C)
service.
NOTE
BCOM
BNC
BNO
PCOM
PNC
PNO
N
H
BCOM
BNC
BNO
PCOM
PNC
PNO
N
H
60
30 Secs
.
0
60
30 Secs
.
0
BCOM
BNC
BNO
PCOM
PNC
PNO
N
H
BCOM
BNC
BNO
PCOM
PNC
PNO
N
H
60
30 Secs
.
0
60
30 Secs
.
0
Probe wires
Control Box
Chassis Ground