Carel humiSonic, User Manual

Page: 62 / 72

28
ENG
Direct version for room applic. +0300062EE - rel. 1.4 - 24.09.2020
12.3 Maintenance
Maintenance on the humidifier must be carried out by CAREL Technical
Service or professionally qualified personnel.
WAR N I N G: electric shock hazard. Before making the electrical
connections, the appliance must be disconnected from the mains power
supply. Electrical disconnection must be verified by measurement.
The fill valve is normally closed and the drain valve is normally open,
consequently, when powering down the humidifier, the unit is drained
automatically. Wait for all of the water to be emptied from the humidifier
tank.
Preventive maintenance on the humidifier is recommended to ensure
optimum system performance. Maintenance includes:
• checking tightness of the electrical connectors;
• cleaning and visual inspection of the components;
• checking water level and making sure there are no leaks.
NO TICE:
• the piezoelectric transducer is very delicate: when cleaning the inside
of the tank, make sure not to scratch it, for example with a screwdriver;
• tighten the nuts applying the maximum allowed torque (0.08 ± 0.5
N·m). Excessive tightening torque may damage the humidifier.
• beware of electrostatic discharges, so as to prevent damage to
electronic components.
12.4 Scheduled maintenance
Scheduled maintenance on humidifiers involves cleaning all the parts in
contact with the water:
1. fill/drain
lines;
2. water tank.
Maintenance intervals depend on water quality and humidifier
operating hours. The use of demineralised water minimises maintenance
requirements.
NO TICE:
it is recommended to perform scheduled maintenance at least
once a year, irrespective of water quality and humidifier operating hours.
It is recommended to periodically check operation of the piezoelectric
transducers, the corresponding driver boards and the fans, by carrying
out a visual inspection:
1. make sure there is a water column above each of the piezoelectric
transducers during humidifier operation;
2. check that the LEDs on the driver boards are on and are yellow during
humidifier operation;
3. check that the fans are running during humidifier operation.
12.5 Unscheduled maintenance
Unscheduled maintenance may involve replacement of:
1. fill/drain solenoid valve;
2. driver
board;
3. piezoelectric transducer;
4. fan;
5. electronic control board;
6. power
supply.
12.6 Replacing the components
To access the load/drain solenoid valve, remove the right closing panel
A
B
Fig. 12.c
1. loosen and remove the screw (A);
2. remove the cover (B).
Drain solenoid valve
1. remove the electrical connectors and move the spring fasteners so
as to remove the hoses, then remove the block (D): elbow connector,
drain valve, T-connector.
Fig. 12.d
Fill solenoid valve
1. loosen and remove the screws (arrows) so as to remove the bracket
(E);
Fig. 12.e
Fig. 12.f
2. remove the electrical connectors and move the spring fasteners so
as to remove the hoses, then remove the block (F): elbow connector,
fill valve, connector.