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PRELIMINARY CHECKS BEFORE START-UP
1.
The unit should not be started up until the system piping has been cleaned and all the air has
been purged.
2.
Check condensate drain pipe slope.
3.
After you have connected the main power supply to the cassette unit, it is necessary to check the
good function of the condensate water pump which is installed inside.
Due to transport vibration, it might be possible that the float switch is hung up and the pump
might not work in the correct way. For this reason, you have to do the following, to ensure good
functioning of the unit:
4.
Install the cassette unit in an absolute horizontal position.
5.
Fill the internal drain pan (manually) with enough water to ensure the drain pump is working.
6.
You can fill the drain pan by pouring water through the external drain pan.
If everything is correct, the water will be pushed out into the pipe work you have installed. If the
valve does not open, you have to make sure the float switch is not hung up inside the unit and
you will have to loosen it by hand.
7.
Make sure that air filter is clean and properly installed.
8.
Ensure that voltage and current values correspond with the unit nameplate values; check
electrical connections.
9.
Verify that air outlets are not closed.
MAINTENANCE
1.
Before performing any service or maintenance operations, turn off the main power switch.
2.
The air filter is made of acrylic fiber and is washable in water. To remove filter simply open the
intake grille by releasing the two catches. See Fig.19 and the section filter removal.
3.
Check the filter periodically and before the operating season; clean or replace as necessary.
PROLONGED UNIT SHUT-DOWN
1.
Prior to restarting the unit:
2.
Clean or replace the air filters.
3.
Check and remove any obstruction from the external drain pan and the internal drain pan.
EXTRA MAINTENANCE
1.
The electrical panel is easily accessible by removing the cover panel.
2.
The inspection or replacement of internal components such as; heat exchanger coil, condensate
3.
Drain pump, float switch, involves the removal of the condensate drain pan. See Fig.20-25.
4.
During the removal of the condensate drain pan protect the floor under the unit with a plastic
sheet from condensate water that could be spilled.
5.
Remove fixing screws of the drain pan fixture and remove condensate drain pan with care.
The appliance is intended to be maintained by qualified service personnel and located at a height of
not less than 2.5m.
HYDRONIC CASSETTE
29
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