2
SPECIFICATIONS
Electrical Ratings
Series PS-801 for Steam Boilers
Preset time delays prevent nuisance burner cycling:
15 second Delay on Make (DOM)
10 second Delay on Break (DOB)
Conductive liquid required
(water/glycol mixtures up to 50% concentration may
be used)
Automatic reset after power outage
Maximum Pressure:
15 psi (1kg/cm
2
)
All models include a provision for adding an alarm or
automatic water feeder.
Series PS-851 for Hot Water Boilers
No time delays provided
Conductive liquid required
(water/glycol mixtures up to 50% concentration
may be used)
Automatic reset after power outage
Maximum Water Pressure:
160 psi (11.2kg/cm
2
)
Maximum Water Temperature:
250˚F (121˚C).
All models include a provision for adding an alarm
or automatic water feeder.
Control Voltage:
120 VAC
HZ:
50/60
Probe Sensitivity:
For models with red (low water) and amber (test)
lights: 3,000 ohm
For models with red (low water) and green (power)
lights: 7,000 ohm
Control Power Consumption:
For models with red (low water) and amber (test)
lights: 3 VA
For models with red (low water) and green (power)
lights: 3.6 VA
Motor Switch Rating (Amperes)
Model
Voltage
Full Load
Locked Rotor
Pilot Duty
120 VAC
120 VAC
7.5
43.2
125 VA at
240 VAC
3.75
21.6
120 or 240 VAC
50 or 60 Hz
The Series 800 controls provide con-
tinuous protection against low water
conditions for residential, commercial
and industrial applications. Newer
models feature increased probe
sensitivity to prevent nuisance shut-
downs, and a new test feature that
diagnoses shorted probe problems at
installation. The user-friendly diag-
nostic LEDs simplify installation and
troubleshooting, ensuring proper
operation and saving time.
Green
(Power On)
Red
(Low Water)
Amber
(Test)
Red
(Low Water)
Older Models
New Models
Temperature:
Storage: -40˚F to 120˚F (-40˚C to 49˚C)
Ambient: 32˚F to 120˚F (0˚C to 49˚C)
Humidity:
85% (non-condensing)
Electrical Enclosure Rating:
NEMA 1 General Purpose
