30
1.53
TOP unit heaters
Unit heaters (2-stage three-phase motor/1-stage AC single-phase motor/continuously variable EC single-phase motor)
Installation and operating instructions
11 Decommissioning (longer term)
Switch of all electrical components.
If there is a risk of frost, it is essential that the heat exchanger
and pipework are protected from freezing by the use of anti-
freeze!
12 Maintenance and cleaning
12.1 Housing
The galvanised unit heater housing is maintenance-free. Dirt on
the housing does not affect the operation of the unit. Cleaning
is only necessary for aesthetic reasons.
12.2 Heat exchanger
Dusty and oily deposits on the fins of the heat exchanger
restrict the air flow and heat transfer. Only a clean heat
exchanger will produce its full heat output in the long
term. For this reason, regularly check the unit heater's heat
exchanger for dirt and clean if necessary.
Check the unit heater once a year before the start of the
heating season, and in less favourable conditions (high dust
content in the air), even monthly.
Carefully blast the Cu/Al heat exchanger with compressed air
to remove accumulated dust. Proceed extremely carefully,
as the aluminium fins bend very easily (bent fins have to be
straightened with an appropriate tool).
Any oily deposits on steel heat exchangers can also be cleaned
with ease using a steam cleaner.
12.3 Motor
Immediately rectify any defects established on systems/
assemblies/equipment. If the defect constitutes an acute
danger, then do not operate the unit / system in its defective
state.
Pay attention to all safety and operating guidelines (EN 50
110, IEC 364) when performing set-up and maintenance
work.
Disconnect the motor from the mains voltage supply and
prevent it from being re-connected!
Summary of Contents for Lufterhitzer TOP Series
Page 39: ......
