ACORN ENGINEERING FIELD SERVICE
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800-743-8259 •
LOCAL
626-855-4866 •
FAX
626-855-4863
INSTALLATION, OPERATIONS & MAINTENANCE MANUAL
®
MERIDIAN 3751
Please visit
www.acorneng.com
for most current specifications.
CONDITION:
WATER DOES NOT FLOW
Probable Cause
Solution
Water main closed.
Open water main.
Checkstops closed.
Open checkstops.
Debris or scale in checkstop strainer
.
Remove checkstop strainer and clean.
Air leaks from 1/8” O.D. tubing or fittings.
Replace damaged tubing or fitting.
Pushbutton air diaphragm leaks.
Replace pushbutton air diaphragm.
Servomotor diaphragm center hole is blocked.
Servomotor upper diaphragm is damaged.
Low or no water pressure at supplies.
Increase water pressure to 30 PSI minimum.
CONDITION:
WATER DRIPS, WON'T SHUT OFF
Probable Cause
Solution
Servomotor diaphragm offset hole is blocked.
Servomotor seat is damage
Replace servomotor seat.
Servomotor plate or diaphragm is obstructed.
Servomotor timer assembly is damaged.
Replace servomotor timer assembly.
Probable Cause
Solution
Valve riser tubing is crimped.
Straighten valve riser tubing.
Debris or scale in checkstop strainer
.
Remove checkstop strainer and clean.
Blockage in valve flow control.
Remove blockage.
Low water pressure at supplies.
Increase water pressure to 30 PSI minimum.
Lime deposits in hot water pipes.
CONDITION:
REDUCED WATER FLOW
Probable Cause
Solution
Air leaks from 1/8" O.D. tubing or fittings.
Replace damaged tubing or fitting.
Pushbutton air diaphragm leaks.
Replace pushbutton air diaphragm.
Remove blockage.
Replace servomotor upper diaphragm.
Remove cause of obstruction.
Remove blockage.
TROUBLE SHOOTING FOR OPTIONAL PUSHBUTTON OPERATED VALVES
Normal Valve Function:
Hand pushbutton operated valve has an adjustable flow time from
5 to 60 seconds.
Remove lime deposits with appropriate
cleaning solution.
CONDITION:
PREMATURE WATER SHUT OFF
Page 21 of 27
Part #: 6215-369-000
Date: 03/05/19
