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Maintenance manual for technical assistance - LB 2800 - LB 2810
Manual code 10066574 / Rel. 0.00 / March 2009
27
Check correct operation of the drain - non-return valve as follows:
N
ON-RETURN DRAIN VALVE
- activate the dispenser group for about 30 seconds;
-
attach a filter holder (1) with pressure gauge (available on request) to the group;
- activate the dispenser group and use the pressure gauge (2) to check the increase of
pressure up to 8-9 bar
- check the increase of pressure due to the effect of the expansion of the water that has
been heated up to a value of about 12 bar. Reaching this value proves correct operation
on the valve and the seal of the gaskets and the solenoid valves.
- Check for correct operation of the PRESSURE GAUGE.
- Check for LIME SCALE on the heating element and boiler.
- Check the efficiency of the SOLENOID VALVE of the dispensing group.
- Check for any HYDRAULIC LEAKS at the bench and the efficiency of the drains.
9.1. Replacement of the perforator
With the aid of a small screwdriver, remove the spring that blocks the perforator in the seat of the filter holder (A).
Then remove the perforator and replace it with a new one (B).
Reposition the spring.
Yearly checks
1
2
.
A
B
31


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