Power Source Set-Up; Coolant - Car-O-Liner CTR12000 Instruction Manual

Car-O-Liner Group AB
4.4

Power source set-up

4.4.1 Coolant

General
Malfunctions
Topping-up
41643, ENG - rev. 2, 2016-10
Due to the increased current load during resistance spot welding, power sec-
tion, transformer, rectifier, hose pack and electrodes must be cooled with a
cooling liquid.
During welding operation, this cooling liquid is made circulating by a circu-
lation pump. It flows from the cooling unit through power section, trans-
former, rectifier and hose pack to the electrodes in the gun ("Forward flow").
It absorbs the heat and returns to the cooling unit ("Back flow").
The circulating pump of the cooling system is driven via 230V AC motor.
The welding machine being started at the mains switch, the cooling system is
also ready for operation.
It is stopped automatically, if the power source is ON for a longer period of
time without that welding operation is started. The coolant pump is automat-
ically cut in when the start button is activated; its follow-up time is adjusta-
ble.
The coolant circuit is supervised by temperature and level sensors. In case of
pump failure during welding or if the cooling liquid does not circulate for
other reasons, the control system cuts off the welding current. The same ap-
plies to the case of insufficient cooling liquid level. In both cases, the red er-
ror lamp on the control panel of the power source lights up (Symbol).
Circulating in a closed circuit, the coolant can only evaporate to a small ex-
tent so that it does not often need to be topped up. Topping-up mostly is nec-
essary after hose packs have been replaced, or if a larger amount of coolant
has leaked through defective hoses or joints.
The coolant level is controlled by a sensor initiating a message of topping-up
on the display. The filler stub is on the rear of the power source.
The storage tank of the cooling unit has a volume of about 20 litres.
CTR12000
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