MAGNATECH Pipemaster 515, Инструкция по эксплуатации и техническому обслуживанию, Страница: 58 / 101

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16.0
MODEL 905 WATER CIRCULATOR
The radiator-type water circulator is an integral part of the welding system. The Circulator is attached
directly beneath the Pipemaster Power Source by two cam-lock type latches. Only low voltage (24
volts DC) is present in the water circulator.
16.1 Filling Water Circulator with Coolant
Fill the water tank with 8
R
(2 gallons) of Magnatech torch coolant fluid, P/N 7280, or
equivalent. This will provide freezing protection to -10
E
C (14
E
F). If this is unavailable, use
standard ethylene glycol (antifreeze) mixed 3 parts water to 1 part antifreeze.
ATTENTION : A special mix allowing lower temperature use is available. Distilled or
demineralized water is strongly recommended to prevent bacterial and fungal
growth. The amount of cooling fluid required will depend on the cable length
of the weld Head. (If using extension cables, it will be necessary to check the
level of coolant after several minutes of first turning on power. Top off
coolant level as required.)
16.2 Connecting Water Circulator to the Pipemaster
Connect the circulator to the Pipemaster power source using the cam-lock latches. An
interconnect cable provides power to the circulator, as well as to provide the water flow
switch signal to the Pipemaster.
16.3 Operation of the Water Flow Switch
The water flow switch has a factory preset trip point that is not adjustable (0.91/min or 15
oz/min.) The flow switch is connected in series with the power supply contactor and start
weld circuit. If the flow is above the trip point, the flow switch completes the circuit with a
simple internal switch closure (relay is energized). If the flow drops below the preset point,
this circuit is interrupted. A "low flow" situation will cause immediate drop out of the power
supply contactor without any downslope of welding current.
If there is inadequate water flow to actuate the switch, a welding arc cannot be initiated.
Pushing the start weld switch will cause prepurge to occur. At the point in time that the arc
should be initiated, the starting sequence will be interrupted and a warning will be displayed.
16.4 Shipment of Water Circulator
When shipping the system, be certain that the water is drained out of the water
circulator.
16.5 Periodically Clean the Filters
A filter is provided on the pump inlet, as well as one built into the pump body. Periodically
inspect and clean/replace the filter elements. To access the pump filter, unscrew the nut-
shaped fitting.
16.6 Circuit Breaker
A circuit breaker mounted on the rear panel protects internal circuitry and components.