Once the pressure bar has been depressed, the magnet will hold the bar
down until both neon lights go out. This should prevent the possibility of
insufficient cooling which can result in premature wear of the teflon barrier
tape and other consumable spares.
To extend the service life of the consumable items, always operate at the
minimum setting consistent with good seals and allow adequate cooling time
before removal of the bag.
Setting the Heating Time
Switch on the machine and set the timer control to position No. 2. Place the
polythene bag between the jaws and depress the upper jaw to the preset stop
point. The timer light will illuminate for a period of approximately one second.
Allow a further two seconds to cool before releasing the pressure from the
sealed bag. Examine the seal and progressively increase the heating and
cooling time until satisfactory seal strength is achieved.
Maintenance
The complete element assembly can be unplugged (without tools) from the
machine body so that it can be replaced with a new or reconditioned unit.
Removal of the Teflon barrier tape from the displaced element enables the
wire to be inspected and replaced if kinked or damaged. When rewiring the
element, ensure that the wire passes over the pins, down through the hole at
each end of the bar and up through the contact pin hole. Secure one end with
the nut and washer and tension the wire strip before tightening the remaining
nut. This ensures that any excess wire is on the top of the element. It is
important that this excess is removed to avoid any risk of a short circuit to the
metal body that can result in damage to the timer circuit.
To replace the pressure pad, fit approximately 30mm at each end of the
pressure bar and work the pad into the gap working towards the centre.
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