12
Fig.4 DV 20/30
Fig.5 DV M 20
- If the fan breaker is set on “Man” the fan will run
continuously till it is set on “Auto”.
3.2 Summer Operation
The burner breaker (1) is set on “0” and the fan
breaker (2) on “Man”. In that way ventilation and thus
a comfortable summer temperature is obtained.
3.3 Operation With Fan Speed Control
The air supply can be adjusted by means of a fan
speed control (extra).
It is important not to reduce the air supply too much,
as it will reduce the efficiency of the unit and the unit
may also be switched off by the combi thermostat
(see paragraph 6 “Fault Finding”).
*Accessory
4. Service and cleaning
4.1 Filter
The air intake filter should be checked and, if
necessary, cleaned/renewed every 6 months. In very
dusty rooms it should be checked more often.
The filter is drawn out of the filter frame. If the filter is
only a little dirty it can be vacuum cleaned. If it is very
dirty it should be washed in luke warm soapy water or
perhaps be renewed (fig. 4/5).
Before the complete filter is pushed back into the unit
the fan runner must be checked and perhaps vacuum
cleaned.
4.2 Burner Chamber and Heat Exchanger
The heat exchanger and the burner chamber should
be cleaned at least once a year, as soot deposits can
reduce the efficiency of the unit.
Warm air heaters should be checked at least once
a year by a specialist! We recommend you to take
out a service contract.
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