Xylem MM 273E Model 750-HW-MT-120 Probe Type High Water Manual Reset Control Unit - Manual (Page 3)

Determine where to install the remote sensor (sold separately) based on the following requirements:
Option A
a. The Remote Sensor can be installed directly in a 1"
or larger tapping in the top of the boiler.
b. The probe of the RS-1-BR-1 Remote Sensor will
need to be cut to appropriate length based upon the
level where high water cutoff/alarm is desired.
c. The probe of the RS-1-LP Remote Sensor is
approximately 2" long therefore high water
cutoff/alarm will occur at that level.
d. There must be a minimum 1/4" (6.4mm) clearance
between the probe and any grounding surface inside
the boiler or pipe.
Option B
a. The Remote Sensor can be installed directly into the
1" fittings of the boiler’s equalizing piping.
b. If installed in the upright or vertical position:
• The probe of the RS-1-BR-1 Remote Sensor will
need to be cut to appropriate length based upon
the level where high water cutoff/alarm is desired.
• The probe of the RS-1-LP Remote Sensor is
approximately 2" long therefore high water
cutoff/alarm will occur at that level.
c. If installed in the sideways or horizontal position:
• The probe of the RS-1-BR-1 Remote Sensor
cannot exceed 4" in length.
NOTE: The Remote Sensors SHOULD NOT be
installed in equalizing piping that is smaller than
1" NPT.
d. There must be a minimum 1/4" (6.4mm) clearance
between the probe and any grounding surface
inside the boiler or pipe.
STEP 1 - Where to Install the Remote Sensors
3
or
or
or
Upright or Vertical
Position Sideways or Horziontal
Position