GB-H-152 GAS BOOSTER PACKAGE OPERATION AND MAINTENANCE MANUAL
© 2008 DH Instruments, a Fluke Company
Page 20
5.8
GAS CONTINUOUSLY VENTS THROUGH EXHAUST
MUFFLER
When the booster does not run and gas is venting through the muffler (14), the booster’s air cycling valve
(spool valve) is stuck between its toggle points. This is normally caused by a low drive air flow rate.
There are two methods for restoring proper operation. It is recommended to perform them in the
order below:
n
Close the high pressure adjust regulator (6) and booster drive shutoff valve (4), then increase drive
air pressure to about 0.5 MPa (75 psi). Open the booster drive shutoff valve (4) quickly. If the
booster begins to operate normally, close the booster drive shutoff valve (4) and reset regulators to
previous settings. Repeat the process until the booster begins normal operation.
o
Close the high pressure adjust regulator (6) and booster drive shutoff valve (4), then increase shop
drive air pressure to about 0.5 MPa (75 psi). Remove the exhaust muffler (14) and use your hand to
plug the vent port. Quickly open the booster drive shutoff valve (4). When the build-up of pressure
begins to leak past your hand, quickly remove it. If booster begins to operate normally, close the
booster drive shutoff valve (4), reinstall the muffler and reset regulators to previous settings. Repeat
the process until the booster begins normal operation.
