Polysoude P6 HW, Operating, Maintenance And Programming Manual, Page: 24 / 100

THE ART OF WELDING
P6 HW
24-100 PN-0110008 Rev. 12
Connection with the gas supply 4. 2. 4.
The connection is made on the rear connector panel of the power source using the connectors delivered with
the machine.
Use litre fl ow meters at the outlet from the gas source (cylinder or manifold). You will fi nd the order number for
litre fl ow meters in 6.2.4 (spare parts list). Before making any connections, brie fl y open the gas valve to expel
any impurities.
Fig. 4.3, Fig. 4.4 & Fig. 4.5 - 1 Gas 1
Fig. 4.3, Fig. 4.4 & Fig. 4.5 - 2 Gas 2
To ensure a successful welding cycle, please provide for a minimum of 2.5 L/min for Argon gas fl ow and 8 L/
min for Helium fl ow.
Continuous gas option for UHP head on P6 HW
A gas fl ow continuing outside the weld cycle can be obtained, if a UHP welding head is connected to a power
source which is equipped with the continuous gas fl ow option.
The fl ow rate of this gas is controlled by:
a manual adjustment valve inserted into the circuit if the gas used (refer to Fig. 4.4) is the same as the •
welding gas. The valve (Fig. 4.4 - A) is adjusted manually.
the litre fl owmeter installed in the gas source (cylinder or manifold) if the gas used (refer to Fig. 4.5) is not •
the same as the welding gas. Connection is made at the rear of the power source at gas inlet 2.
How it works
Depending on the power source con fi guration, the gas fl ows as soon as the power source is switched on with a
rate set by the manual adjustment valve or the litre fl owmeter installed at the gas source.
When the welding cycle is started, with or without arc, the gas fl ow is switched to the welding gas with the rate
set by the litre fl owmeter on the welding gas source and ends when the post-welding gas timer has elapsed.
Afterwards the gas keeps on fl owing at the continuous gas fl ow rate.
As long as a UHP head is connected to the power source, the internal cooling circuit is inhibited.
Once the head is disconnected, the continuous gas fl ow is stopped.