Xylem MM 273E Model 750-HW-MT-120 Probe Type High Water Manual Reset Control Unit - Manual (Page 6)

6
Wiring Diagram Legends
1. Bold lines indicate action to be taken in Step shown.
2. Dotted black lines indicate internal wiring.
PROBE
1 2 3 4 5
WHITE
NEUTRAL HOT
Limit Circuit
ALARM
Note:
Contact positions shown
with water off probe
Remote Sensor Wiring:
• Connect wire from probe end to Terminal
• Connect wire from remote sensor green ground
screw to
Control Wiring:
• Connect 120V hot wire to terminal 1
• Connect 120V neutral wire to terminal 2
• Connect jumper wire from Terminal 1 to
Terminal 3
• Connect wire from beginning of limit circuit
(thermostat, gas valve, limits, etc.) to terminal 5
• Connect wire from end of limit circuit to terminal 2
N
P
M
b. 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), DO NOT
REMOVE, and 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).
RS1-BR-1
SENSOR
• Install electrical conduit between Probe
Housing and Control Box.
Refer to and follow local codes and standards
when selecting conduit and electrical fittings.
Wires from Probe Housing and Control Box must
be in their own conduit. If they are run in conduit
with other wires, there may be interference that
can affect the performance of the control.
NOTE
Wire must be 18 AWG stranded with glass braided
silicone jacket (UL 3071) suitable for high
temperature (200˚C) service.
NOTE
connection "PROBE" on PCB.
Terminal connection "GND" on PCB.
GND