Cashco 135 Low Temp Thermal Probe User Manual
Page 3
IOM-135
3
All Model 135 thermal probes should be re-calibrated annually if the unit has been in service. Refer to Section IV
for instructions to remove and replace the Model 135 thermal probe. Write the main valve serial number on an
adhesive label and apply to the probe. Return all used thermal probes to the factory for examination and calibration.
V. CALIBRATION
SECTION V
SEC TION VI
VI.
TROUBLE SHOOTING GUIDE
1. No/Low Flow or Pressure at Normal Operating Temperatures
Possible Causes
Remedies
A. Back Pressure valve failed
A Inspect and replace if necessary.
B. Upstream fi lter/orifi ce blocked.
B. Inspect and replace if necessary.
C. Leaking or broken fi tting.
C. Inspect and replace if necessary.
D. Diaphragm in main regulator failed.
D. Inspect and replace if necessary.
2. Poor Pressure Control
Possible Causes
Remedies
A. Main regulator seat leakage.
A Inspect and replace if necessary.
B. By-pass valve leaking.
B. Inspect and replace if necessary.
3. Delivery Pressure Rise at No/Low Flow
Possible Causes
Remedies
A. No supply pressure to PTCM.
A Check gauges.
B. Lockout valves closed.
B. Open valves.
C. Unloading valve incorrectly set.
C. Reset.
D. Model 135 thermal probe vent leaking. D. Under normal operating conditions, there should be no fl ow
coming from the outlet vent. If there is fl ow and the temperature of
the gas is not suspect then replace the Model 135 thermal probe.
E. Upstream fi lter/orifi ce blocked.
E. Inspect and replace if necessary.
F. Unloading valve malfunction.
F. Inspect and replace if necessary.
G. Leaking or broken fi tting.
G. Inspect and replace if necessary.
H. Main regulator stuck closed.
H. Verify dome pressure.
I. Strainer blocked.
I. Inspect and replace if necessary.
The contents of this publication are presented for informational purposes only, and while every effort has been made to ensure their accuracy, they are not to be con-
strued as warranties or guarantees, express or implied, regarding the products or services described herein or their use or applicability. We reserve the right to modify
or improve the designs or specifi cations of such product at any time without notice.
Cashco, Inc. does not assume responsibility for the selection, use or maintenance of any product. Responsibility for proper selection, use and maintenance of any
Cashco, Inc. product remains solely with the purchaser.