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Pump Pressure Adjustment
Pump pressure is pre-set at the factory for 130 P.S.I., output
coolant pressure may be adjusted by opening or closing
the by-pass valve on the pump. The by-pass valve adjust-
ment screw is located under the large acorn nut on the
pump body. Pressure can be increased by turning the screw
clockwise and decreased by turning the screw counter-
clockwise. When replacing acorn nut and gasket, tighten
firmly to prevent air from being sucked into pump. Do not
exceed the recommended delivery pressures to torches
as outlined by the manufacturer!
Do not operate the pump into a closed discharge line. If
operated for more than a few minutes against a closed dis-
charge, the resulting heat build-up will cause rapid wear of
the mechanical seal and eventual seizure and failure of the
pump. A thermostat will stop the pump motor if the pump
temperature goes over 131 deg. F.
Be careful not to touch the pump motor when adjusting
pump pressure as it can get very hot, up to 100 deg. F. above
ambient temperature.
MAINTENANCE
WARNING
Electric shock can kill. Precautionary measures should
be taken to provide maximum protection against
electrical shock. Be sure that all primary power to the
machine has been externally disconnected. Open wall
disconnect switch or circuit breaker before attempt-
ing inspection or work inside the circulator. Install all
covers after completing service. Do not operate unit
without covers.
If this equipment does not operate properly, stop work
immediately and investigate the cause of the malfunc-
tion. Maintenance work must be performed by an
experienced person, and electrical work by a trained
electrician. Do not permit untrained persons to inspect,
clean, or repair this equipment. Use only recommended
replacement parts.
1.
Maintain the coolant level within 1/2" of the MAX
mark on the reservoir sight gauge located on the front
panel.
2.
Periodically check the coolant pressure and flow
through the system.
3.
Periodically inspect the radiators for build-up of
airborne dust or other residues that may hinder the
cooling capacity of the WC-7C.
4.
When tightening fittings, use wrench on both male and
female fitting to prevent damage to fittings or plumb-
ing.
5.
When draining old coolant, dispose of it according to
your local applicable rules and ordinances.
6.
Oil pump motor shaft bearings once a year with 30
drops SAE 10 motor oil. The pump bearings are self
lubricating and require no further lubrication.
TROUBLESHOOTING
Pump Below Capacity - Can be caused by restricted
1.
inlet, wrong direction of rotation, low motor R.P.M., and
the relief valve improperly adjusted.
2.
Pump Noisy - Can be caused by restricted inlet,
discharge pressure over 200 P.S.I., loose acorn nut or
damaged acorn nut gasket, air getting into lines, loose
couplings, misalignment between pump and motor,
and loose mounting bolts or clamping ring.
Leakage - Is caused by failing mechanical shaft seal or
3.
rubber O-rings. Arrange to have pump rebuilt.
Pump Turns Hard - Can be caused by misalignment
4.
between pump and motor or by lime and mineral de-
posits in the pump. Deposits in pump would necessitate
a pump rebuild, arrange to have pump rebuilt at pump
service center.
5.
Do not disassemble pump! Any attempt at field repair
will void the warranty.
Pump Motor Not Turning - If PL2 not lit, 115VAC may
6.
not be supplied to P1, or TS1 is over 131 deg. F if PL3 is
lit. If PL1 and PL2 are lit, check F1 and F2.
Fan Motor Not Turning - Check F1 and F2. Neither M1
7.
fan motor nor M2 pump motor will run with F1 or F2
blown.
8.
Pump/Motor Vibration - Indicates wear on coupling.
Replace with P/N 951841 coupling.
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