Maintenance - Trane MERCURY EDAB 1105A Technical Manual

Maintenance

The only maintenance required is periodic inspection and cleaning of the steam boiler components. This should be carried
out at least once a year, preferably before the summer holiday shutdown.
BOILER CYLINDER
Limescale deposits must be cleaned periodically from the electrodes and particles of limescale must be removed from
the filter at the base of the cylinder.
To dismantle the cylinder:
• - completely drain the water from the cylinder:
- using the user terminal, press the UP or DOWN key until the INPUT/OUTPUT screen appears;
- confirm by using the ENTER key;
- press the UP or DOWN key until DO6 HUMIDIFIER DRAIN is selected;
- confirm by using the ENTER key;
• disconnect the power supply by opening the main isolator on the electrical panel;
• disconnect the steam distributor hose from the top of the cylinder;
• disconnect the power connections to the electrodes by unscrewing the terminal connectors and pull off the connectors
of the electrodes;
• unclip the cylinder fixing strap;
• pull the cylinder upwards.
The boiler cylinder can be used many times after the electrodes are cleaned: however, it will eventually require replacement
when the electrode meshes are too worn out to make further cleaning worthwhile.
The spare part consists of only the cylinder itself (with the filter inside).
FEED AND DRAIN CONNECTIONS
Periodic inspections of the feed and drain connections are advisable in order to guarantee trouble-free operation of the
humidifier.
Proceed as follows:
• - completely drain the water from the cylinder:
- using the user terminal, press the UP or DOWN key until the INPUT/OUTPUT screen appears;
- confirm by using the ENTER key;
- press the UP or DOWN key until DO6 HUMIDIFIER DRAIN is selected;
- confirm by using the ENTER key;
• disconnect the power supply by opening the main isolator on the electrical panel;
• disconnect the feed line at the ¾ GAS connection to the inlet solenoid valve connection (U8);
• extract, clean and replace the filter located inside the solenoid valve connection;
• remove the drain solenoid valve, clean out the water pathways and remove any particles of limescale from the drain
siphon.
64 PKG-SVX19B-E4