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14. MAINTENANCE
14.1 Maintenance of the cylinder-cylinder
For correct operation, the steam production cylinder must be periodically cleaned, at intervals linked to the quantity of salts or impurities dissolved in the supply water. This operation is necessary as the lime deposits that form inhibit the exchange of heat between the elements and the water.
IMPORTANT WARNING: do not use detergents or solvents to clean the components in the cylinder and all other plumbing.
The unit must be cleaned in any case when the element over-temperature alarm is activated (see ALAR- MS AND TROUBLESHOOTING), signalled by:
the lighting up of LED 1 and 3, for the type C control module (see Fig. 15.a);
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the display of the message CL for the type H or T control module.
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The cylinder may be hot! Let it cool before handling, or use protective gloves.
To access the cylinder:
turn the appliance off (Fig. 13.1) and open the disconnecting switch on the power line (safety proce-
• dure);
completely empty the water contained in the cylinder (see SHUTTING DOWN THE UNIT);
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open and remove the casing (see Removing and replacing the front casing).
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The layout of the humidifi er is as in Fig. 14.a.
Fig. 14.a Fig. 14.b
Key:
n. description 1 pressure balancing pipe 2 cylinder fastener closing 3 level control
4 thermal lining (optional) with Velcro fastener 5 ground connection
To remove and clean the cylinder, follow the procedure as described below:
remove the steam pipe from the upper pipe union of the cylinder (Fig. 14.c);
1.
electronically disconnect the level sensor (Fig. 14.a, part. no. 3);
2.
remove, from the cylinder cover , the pressure equalising pipe with the level control tank (Fig. 14.a, 3.
part. no. 1);
remove the protective covers of the element electrical connections (Fig. 17.a, part. no. 5) and 4.
disconnect the power cables;
remove the cylinder ground screw (Fig. 14.a, part. no. 5);
5.
undo the cylinder fastener by the lifting the black plastic lever (Fig. 14.a, part. no. 2) and pushing it 6.
to the end of its stroke, thus releasing the stop system;
lift the cylinder to remove the upper pipe union from the drain unit and remove it from the machi- 7.
ne, paying attention to any drops of water or deposits which may be released from the pipe union;
if present, remove the external thermal lining (Fig. 14.a, part. no. 4);
8.
place the cylinder on a working surface which is protected by a material resistant to the water and 9.
lime-scale which could be released during the cleaning operations;
release the cover ring fastening lever and push it to the end of its stroke (Fig. 17.a, part. no. 11);
10.
remove the metal ring, the plastic cover and its connected parts from the cylinder (see Fig. 17.a that shows the cylinder exploded view);
Fig. 14.c
ENGL ISH
Cleaning of the cylinder fi lter 20-27-40-60 kg/h (44-59.5-88-132.2 lbr/h):
disconnect the pump power supply cable and the connection to the drain pipe;
1.
remove from the fl ange the level sensor pipe;
2.
unscrew the fastening screws of the fl ange;
3.
remove the fl ange from the cylinder and clean thefi lter;
4.
To remove and clean the cylinder of the humidifi ers from 20-27-40-60 Kg/h (44-59.5-88-132.2 lbr/h), follow the procedure as described below:
remove the cover of the machine (hydraulic side) unscrewing the screws (Fig. 14.b);
1.
remove the steam pipe from the upper pipe union of the cylinder (Fig. 14.c);
2.
electronically disconnect the level sensor (Fig. 14.a, part. no. 3);
3.
remove, from the cylinder cover, the pressure equalising pipe of the level control (Fig. 14.b, part.
4.
no. 1);
remove the protective covers of the heating element electrical connections (Fig. 17.c part. no. 1) and 5.
disconnect the power cables;
remove the cylinder ground screw (Fig. 14.b, part. no. 5);
6.
if present, remove the external thermal lining (Fig. 14.b, part. no. 4);
7.
remove the use fl ange (see fi lter cleaning);
8.
remove the cylinder making it run on the din rails;
9.
place the cylinder on a working surface which is protected by a material resistant to the water and 10.
lime-scale which will be released during the cleaning operations;
remove the plastic cover and its connected parts from the cylinder 11.
Before handling the elements, ensure that they are not hot! Use protective gloves if necessary.
Remove the non-stick fi lm (optional), if present, from the internal wall of the cylinder, and eliminate 12.
any lime deposits from this using a jet of water (see Replacing the components
for humidifi ers up to 10 kg/h /22 lbr/h unscrew the ring nut on the lower cylinder pipe union and 13.
remove the bottom fi lter, which can be reused after cleaning any deposits; the gasket can be reused or, if damaged, can be replaced and ordered as a spare part (Fig.17.a, part. no.13-14 o Fig.17.b, part 12- 13);
the elements can also be cleaned without removing them from the upper cover; to do this, after 14.
having removed the fl aky portion of lime, immerse the heating elements in a warm 20% solution of acetic acid for 30 minutes, removing the remaining surface deposits with a non-metallic spatula, then rinse well; if the plates are Tefl on-coated, avoid using any type of metal tools so as to not damage the non-stick layer;
if necessary, the elements can be removed by unscrewing the fastening nut which holds them to 15.
the plastic cover; in this case the seal gasket should be replaced;
remove the deposits and rinse the internal walls of the cylinder and the probe wells.
16.
Re-assemble the cylinder by repeating the above operations in the reverse order, remembering to re-fasten the ground screw (Fig. 14.a e .b, part. no. 5). The procedure described above refers to the three-phase version (see Fig. 17.b).
For the power connections follow: Electrical diagram of the heating element connection corresponding to the heads.
Fig. 14.d
alarm
reset
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30% 50% 75% 100%
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alarm SEL
reset dehum. x1000 PRG
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