HEIL PT 1000, Operation Manual

Page: 168 / 202

Issued September 2017
Compressed Natural Gas (CNG) Option Copyright 2017, Heil Environmental
Printed in U.S.A.
160
COMPRESSED NATURAL GAS (CNG) FUEL
MODULE (CONTINUED)
B. Fuel Module Components (Continued)
3. Manual Shut-Off Valve
The manual shut-off valve is located on the bottom
front of the fuel control module. Rotate the handle
clockwise so arrow turns down and points to the
‘OFF’ position to prohibit fuel flow from the tanks to
the vehicle’s engine. Rotate the handle
counterclockwise so arrow points to the ‘ON’ position
to allow fuel flow from the tanks to the vehicle’s
engine.
Figure 76. Manual Shut-Off Valve
4. Purge Valve
Located inside the side maintenance access door,
the purge valve, when loosened counterclockwise,
purges CNG from the vehicle’s fuel control module to
allow safe access to the filter assembly.
Figure 77. Purge Valve