Nova-Tech LMI Roytronic Series A Metering Pump - Manual (Page 37)

37
PROBLEM POSSIBLE CAUSE SOLUTION
Pump Will Not Prime 1. Pump not turned on or plugged in. 1. Turn on pump/plug in pump.
2. Output dials not set properly. 2. Always prime pump with speed and
stroke at 100%.
3. Foot Valve not in vertical position on
bottom of tank.
3. Foot Valve must be vertical (see Foot
Valve Installation, Section 3.7).
4. Pump suction lift too high. 4. Maximum suction lift is 5 ft (1.5 m).
Pumps with High Viscosity Liquid
Handling Assemblies require flooded
suction.
5. Suction tubing is curved or coiled in
tank.
5. Suction tubing must be vertical. Use
LMI ceramic weight supplied with pump
(see Section 3.7).
6. Fittings are over tightened. 6. Do not overtighten fittings. This causes
seal rings to distort and not seat prop-
erly which causes pump to leak back
or lose prime.
7. Air trap in suction valve tubing. 7. Suction tubing should be as vertical as
possible. AVOID FALSE FLOODED
SUCTION! (see Section 3.2.1).
8. Too much pressure at discharge.
(Pumps without multi-function valve.)
8. Shut off valves in pressurized line.
Disconnect tubing at injection check
valve (see Priming Section 4.2). When
pump is primed, reconnect discharge
tubing.
Pump Loses Prime 1. Solution container ran dry. 1. Refill container with solution and reprime
(see Section 4.2).
2. Foot Valve is not in a vertical
position on the bottom of the tank.
2. Foot Valve must be vertical (see Foot
Valve Installation, Section 3.7).
3. Pump suction lift is too high. 3. Maximum suction lift is 5 ft (1.5 m).
Pumps with High Viscosity Liquid
Handling Assemblies require flooded
suction.
4. Suction tubing is curved or coiled
in tank.
4. Suction tubing must be vertical. Use
LMI ceramic weight supplied with pump
(see Section 3.7).
5. Fittings are over tightened. 5. DO NOT OVERTIgHTEN FITTINgS.
This causes seal rings to distort and
not seat properly which caused pump
to leak back or lose prime.
6. Air trap in suction valve tubing. 6. Suction tubing should be as vertical
as possible. AVOID FALSE FLOODED
SUCTION! (see Section 3.2.1).
7. Air leak on suction side. 7. Check for pinholes, cracks. Replace if
necessary.
6.0 Troubleshooting
TROUBLESHOOTING