Xylem MM 284D Series PSE-800 Probe Type Low Water Cut-Off for Steam Boilers - Manual (Page 2)

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SPECIFICATIONS
Model Control Voltage Motor Switch Rating Pilot Rating
PSE-802-24
PSE-802-U-24
24 VAC N/A 50VA
PSE-802-RX2-24
PSE-801-120
120 VAC 7.5 FLA 43.2 LRA 125VA
PSE-801-U-120
The Series PSE-800 probe type LWCO’s provide
protection against low water conditions for residential
and commercial steam boiler applications. The control
uses patented technology to monitor changes in
water conductivity. When defined parameters are
exceeded, the new PSE-800 makes a decision to
shut the burner off based on the volatility/variability of the resistance readings. This new patented technology
provides the best protection possible without turning
off the boiler unless a low water condition exists. As
an added measure of safety, the control will turn off
the boiler if it recognizes an out-of-water condition
when the sensitivity threshold is exceeded.
Green
(Power On)
Red
(Low Water)
Operation
Automatic reset after power outage
All models include a provision for adding an alarm or automatic
water feeder.
30 second Delay on Make (DOM)
10 second Delay on Break (DOB)
Control Unit
Temperature Ratings:
Temperature:
Storage: -40˚F to 135˚F (-40˚C to 57˚C)
Ambient: 32 F to 120 F (0 C to 4 C)
Humidity: 85% (non-condensing)
Probe Specifications
Maximum Steam Pressure: 15 psi (1.0 kg/cm 2 )
Probe Sensitivity: 7,000 ohm
HZ: 50/60
Control Power Consumption:
1.7VA @ 24VAC
3.6VA @ 120VAC
Electrical Enclosure Rating: NEMA 1 General Purpose
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