Gastro M GW 40 Serie Installation-Emploi-Entretien page 18

Type and dosage of detergent and rinse agent are
crucial in affecting the appliance's performance and
service life.
Use only liquid products for industrial washing with
antifoaming agents.
The temperature inside the bowl is set at 55/60°C.
This temperature favours the correct use of the
chemical characteristics of all industrial detergents.
The temperature of the boiler is set at 87-90°C.
This value allows the rinse water temperature to be
optimized throughout the cycle.
It is advisable not to change this parameter.
RINSE AID DISPENSER
The appliance is equipped with a fully automatic
rinse aid dispenser.
Before starting the appliance make sure that the
rinse aid suction tublet is inserted to its container.
During the manufacturing process the dispenser is
calibrated for maximum opening and must be then
adjusted according to the water hardness.
Before setting the right amount of surfactant to be
used, it is advisable to carry out a specific test to
determine the degree of water hardness.
If the hardness of the water is greater than 15°F.
(French degrees), we advise to install a decalcifier
upstream from the supply solenoid valve of the
machine.
Calibration: Turn the adjustment screw anticlockwise
to increase the capacity and clockwise to decrease it.
A perfect dosage is obtained by turning the
adjustment screw by approximately 90 degrees.
LOADING THE DETERGENT
USE ONLY SPECIFIC ANTI-FOAM
DETERGENTS IN THE APPROPRIATE
DOSES.
Pour the required amount of detergent into the
dishwasher by following the instructions provided by
the manufacturer.
If powder detergent is used make sure that it is
evenly distributed in the bowl and does not deposit
on one single area in order to avoid the formation of
dark stains at the bottom; shake the water.
DISPENSER FOR LIQUID DETERGENT (OPTIONAL)
We recommend installing an automatic detergent
dispenser.
Follow the manufacturer's instructions carefully. The
amount of detergent poured into the bowl depends
on the amount of water consumed by the machine
during each rinse cycle.
Before adjusting the detergent dispenser (optional),
this and the corresponding small supply pipe must be
filled as follows:
- Supply voltage to the machine.
The dispenser is connected in parallel with the
-
load/rinse solenoid valve.
Do not insert the overflow in the drain hole and run
- the water until the small transparent plastic pipe and
the dispenser are filled.
Check the detergent concentration and the supply
- water hardness by referring to the product data
sheet before adjusting the dispenser.
HOW TO REGULATE THE DETERGENT DISPENSER
By fully turning the timer anticlockwise the pump is
always off, whereas by turning fully it clockwise the
pump is always on.
The intermediate settings of interval/operation are
exemplified in the diagram below:
Since the control is parallel to the load/rinse solenoid
valve, when the machine is filled with water, the
dispenser adds the detergent according to the
amount established by the manufacturer.
When the rinse cycle starts, the load/rinse solenoid
valve allows the dispenser to replenish the detergent
in the bowl.
The amount of detergent is right when the crockery
is free from any food residues at the end of the wash
cycle.
An excessive amount of detergent can give rise to the
build-up of foam in the bowl and leave white streaks
on the crockery.
Insert the overflow in its housing and carry out some
trial cycles.
Perfect wash results can be guaranteed by gradual
setting.
FUNCTIONAL CHECKS
Before operating the machine it is appropriate to
follow the testing procedure below:
- CHECKING THE WATER LEVEL:
During the filling of the bowl, the water must stop
flowing into the bowl when its level is at least 1 cm
below the level of the overflow.
To protect the heating element while the bowl is
being drained, the load solenoid valve must start
operating again when the water level is 2 cm above
the heating element.
- CHECKING THE RINSE CYCLE:
The rinse arms must rotate freely and all the sprayers
must work correctly.
- CHECKING THE WASH CYCLE:
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