McDonnell & Miller PSE-802-24, FS7-4, FS7-4l Instruction Manual

INSTRUCTION MANUAL

211630

MM-284G

Operation

The Ser

ies 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

SPECIFICA

A

utomatic 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)

Contr
T

emperature:

T

Humidity: 85% (non-condensing)

ol Unit

emperature Ratings:

Storage: -40˚F to 135˚F (-40˚C to 57˚C)

Ambient: 32 F to 120 F (0 C to 4 C)

TIONS

oo

o

o

9

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)

Probe Specifications

Maximum Steam Pressure: 15 psi (1.0 kg/cm2)
Probe Sensitivity: 7,000 ohm

Model

PSE-802-24
PSE-802-U-24
PSE-802-RX2-24
PSE-801-120
PSE-801-U-120

HZ: 50/60

Control Power Consumption:

1.7VA @ 24VAC

3.6VA @ 120VAC

Electrical Enclosure Rating: NEMA 1 General Purpose

Control Voltage Motor Switch Rating

24 VAC N/A 50VA

120 VAC 7.5 FLA 43.2 LRA 125VA

Pilot Rating

2