Instruction Manual

IOM-B2
5
SECTION VII
VII. TROUBLE SHOOTING GUIDE
1. Erratic operation; chattering.
Possible Causes Remedies
A. Oversized regulator; inadequate rangeability. A1. Check actual fl ow conditions, re-size regulator for minimum and maximum fl ow.
A2. Increase fl ow rate.
A3. Decrease regulator pressure drop; decrease inlet pressure by placing a throttling
orifi ce in inlet piping union.
A4. Install next step higher range spring.
A5. Before replacing regulator, contact factory.
2. Regulator inlet (upstream) too high.
Possible Causes Remedies
A. Regulator undersized. A1. Confi rm by opening bypass valve together with regulator.
A2. Check actual fl ow conditions, re-size regulator; if regulator has inadequate
capacity, replace with larger unit.
B. Incorrect range spring (screwing in CW of
adjusting screw does not allow bringing
pressure level up to proper level).
B. Replace range spring with proper lower range.
C. Too much rise (build). C1. Review rise (build) expected.
C2. Contact factory.
3. Sluggish operation.
Possible Causes Remedies
A. Fluid too viscous. A. Heat fl uid. Contact factory.