Special Equipment Safety Features; High Pressure Safety Device (Rupture Disc); Temperature Sensor; Spray Gun Safety Latch - North Star M1574210J Owner's Manual

This unit is equipped with the following safety features:

High Pressure Safety Device (Rupture Disc)

Acts as a backup safety feature. If the Pressure Control
Valve (Unloader) malfunctions, this separate high-
pressure safety device will open and relieve excess
system pressure. Repair is required.
High
Pressure
Rupture Disc
WARNING: Rupture Disc failure
If the high-pressure safety device ever discharges
water, turn the motor off and do not use the machine.
Call Product Support at 1-800-270-0810.

Temperature Sensor

Measures water temperature and automatically turns
burner off when temperature setting is reached. When
water temperature drops, burner automatically
reignites.
TEMPERATURE SENSOR
Pump Thermal Relief Valve
This unit is equipped with a thermal relief valve to
protect the pump from overheating. The pump
continues to work in bypass mode when you are not
spraying. If high temperatures are developed during
bypass mode, the thermal relief valve will open and
discharge hot water onto the ground, protecting the

Special Equipment Safety Features

Fig.1574210_R
Fig06831
pump from overheating. The thermal relief valve is
located on the pump manifold's low-pressure port.

Spray Gun Safety Latch

Has a built-in trigger safety latch to guard against
00417
accidental trigger actuation.

High Pressure Limit Switch

Acts as primary safety feature. If the system pressure
exceeds the set pressure limit this device will stop the
burner from firing.
8
Safety Latch
Fig06830