36
1.54
Ultra
Comfortable indoor climate in high-end interiors
Installation and operating instructions
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Are all the impellers running smoothly or are grinding noises
audible?
Determine the cause as soon as grinding noises become audible.
Possible causes are:
• a unit installed in too confined a space
• dirt on site (e.g. pieces of paper) between the impeller and heat
exchanger.
12. Decommissioning (longer term)
If there is a risk of frost, it is essential that the heat exchanger and pipework
are protected from freezing by the use of antifreeze!
13. Maintenance/Cleaning
Read the safety information on pages 9 and 19 before commencing
maintenance/cleaning work!
13.1 Housing
The Ultra housing is maintenance-free. Dirt on the housing does not affect
the operation of the unit. Cleaning is only necessary for aesthetic reasons.
Opening the housing:
• Turn the housing cover anti-clockwise to access the Ultra for maintenance
purposes (see diagram below). Two people are required for this.
Caution!
Make sure that all locking hooks on the cover are removed from
their fixings before lowering the housing cover (risk of breakage!). The heat
exchanger of the Ultra can now be accessed for heating for cleaning and
maintenance.
• With Ultra units for cooling, the condensation tray also has to be
removed after the housing cover has been removed, as described in
chapter 13.5, page 40, in order to access the heat exchanger (Caution!
Risk of overflowing water!).
Opening the housing (1)
(2)
(3)