Install Instructions

2
SPECIFICATIONS
Hz: 50/60
Control Power Consumption: 3 VA (max.)
Probe Sensitivity: 20,000 ohm
(water/glycol mixtures up to 50% concentration may be used)
Automatic Reset Models
Whenever water is below the level of the probe, the
control will go into a low water condition. When the
water level has been restored, the control will auto-
matically return to a run condition.
Manual Reset Models
If a low water condition occurs (water off probe), the
manual reset button must be pressed once the
water level is restored to a level above the probe.
CSD-1 Code Compliance
On Manual Reset units, if the control is in a low
water condition (water off probe) when there is an
interruption of power, the control will remain in a low
water condition when power is restored. The reset
button will need to be pressed when the water level
is restored to a level above the probe.
The Series 750 control box connected to a
remote sensor provides protection against low
water conditions for commercial and industrial
applications. The Series 750 control box is fully
CSD-1 compliant and can be used as the primary
LW C O on hot water boilers and as the secondary
LWCO (manual reset) on steam boilers.
C o n t rol Unit
Temperature Ratings:
S t o ra g e : -40˚F to 135˚F (-40˚C to 57˚C)
A m b i e n t : 32˚F to 135˚F (0˚C to 57˚C)
H u m i d i t y : 85% (non-condensing)
Electrical Enclosure Rating: NEMA 1 General Purp o s e
M o d e l C o n t r o l Switch Contact Rating
Voltage (Pilot Duty)
750-MT-24
750-T-24
24VAC
50VA@24VAC
750-MT-120
Or
750-T-120
120VAC
125VA@120VAC
Electrical Specifications