North Star M157594I - Manual (Page 10)

Special Equipment Safety Features
10
High Pressure
Relief Valve WARNING: If the high-pressure relief valve ever discharges water,
turn the engine off and do not use the machine. The valve will no longer
function properly. See a dealer or call Product Support at 1-800-270-
0810.
This unit is equipped with a high pressure
relief valve, which acts as a backup safety
feature. If the unloader malfunctions, the
high-pressure relief valve will open and
relieve excess system pressure.
High
Temperature
Limit This unit is equipped with a high
temperature limit that measures
discharge spray temperature and
automatically turns the burner off
when the temperature setting is
reached. When the discharge spray
temperature drops, the burner
automatically reignites.
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 pump from overheating.
The thermal relief valve is located on
the pump.
Spray Gun Safety
Latch The spray gun is equipped with a
built-in trigger safety latch to
guard against accidental trigger
actuation.
High pressure
relief valve
00417
Safety Latch
High
temperature
limit
Guard
removed
for clarity
Thermal relief valve