GF Piping Systems ECOS 160, Instruction Manual, Page: 24 / 148

8 Fusion Operating instructions ECOS 160/250/315
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RELEASE (reduction of equalization pressure after formation of the fusion bead)
1. After formation of the equalization bead around the entire pipe circumference
(see corresponding welding table), move control lever towards “open <>“
(lever position: halfway between neutral and fully open) until pressure on
manometer shows nearly 0.
Do not open the machine! Pipes have to keep contact with the heating
element.
2. Start timer with preset heat soak time, see corresponding welding table.
HEAT SOAK
The heat soak pressure has to be kept between “0” zero bar and the corresponding
maximum value according to the welding table during the complete heat soak time
(phase 2).
CHANGE-OVER
(removing the heating element)
The change-over time should be as short as possible, the maximum spendable time is
listed in the welding table.
As soon as the heat soak time is elapsed:

Push the control lever into “open <>“ position, 2 seconds at least, as long as the
heating element has no more contact to the pipes. The pipe ends will be separated
by the pull off mechanism from the heater plate.

Immediately remove the heating element from the machine.
JOINING (Fusion process)

Push the control lever into “close ><“, position until the pipes touch each other and
the preset fusion pressure is reached. Hold the control lever in this position for
approximately 15 seconds, than move the lever into the neutral position smoothly.
Keep the pressure value constant for the complete cooling time.
The surfaces to be joined are fused.

Place the heating element in the storage case without damaging or contaminating
the fusion surfaces.
Caution