GF TM 160 ECO Betriebsanleitung Seite 26

8 Fusion
Caution
22
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 <>" for 2 seconds at least, position
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.
Operating instructions TM 160/250/315 ECO