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4
34 Instructions for the Installer
Position ABSENT 15%
Position LOW 35%
Position MEDIUM 50%
Position HIGH 70%
The standard settings of the ComfoAir 350, HL, are
as follows:
" and " ".
– Wait until "InR" appears on the CC Ease
display.
4.5 Setting the Air Specifi cations
The MTD-ERV 350 must be set after installation.
This can be performed using the air specifi ca-
tions of the MTD-ERV 350 shown above.
v Setting the normal air volume ‘nL’ corre-
sponds to the presetting of the G 90.
v Setting the normal air volume ‘nL’ corre-
sponds to the presetting of the G 91.
The standard settings of the MTD-ERV 350, nL,
are as follows:
fiiceps ria 053 e MTD-ERVht esU cation
diagram for setting the fans.
• If the previously set air volumes still differ
too much:
– Adjust the valves further.
• Check the whole system again after adjustment
of all the valve stages.
• Switch the MTD-ERV 350 (back) to ventilation
position 2.
4.6 Maintenance by the Installer
As installer you have to service the MTD-ERV 350 as
follows:
• Inspect the heat exchangers and fans
• Clean the fi lter if a preheater is installed.
These measures are described in more detail briefl y
in the following sections.
Position ABSENT 15%
Position LOW 40%
Position MEDIUM 70%
Position HIGH 90%
To set the MTD-ERV 350 (after installation), proceed
as follows:
• Switch the MTD-ERV 350 to the setting mode.
– Press simultaneously for two seconds on
"
retaeherp dna ssapyb ,edom gnittes nI
are always deactivated. The MTD-ERV
350 switches the setting mode off again
automatically after 30 minutes.
• Close all windows and outside doors.
• Close all inside doors.
• Check the presence of air circulation systems in
the building (at least 12 cm
2
per l/s).
demrofrep ton era serusaem eseht fI
(regularly), there is a danger that the
MTD-ERV 350 will cease to function cor-
rectly.
4.6.1 Inspection of Heat Exchanger and
Fans
The fans and the heat exchanger must be inspected
every 4 years.
• Remove the mains plug (A) from the plug sock-
et.
• Pull the fi lters (B) out of the MTD-ERV 350.
• Remove the front plate by removing the screws
(C).
• Push the front plate in the direction of the ar-
row and remove it from the MTD-ERV 350.
• Remove the sealing plate by removing the
screws (D).
-dliub eht ni smetsys noitalucric ria ehT
ing must achieve at least 12 cm
2
per l/s.
• Check whether both fans function in the
three speed ranges.
• Switch the MTD-ERV 350 to the high position.
• Install all the valves and set them according to
the instructions or as in the reference dwelling.
If no data are known:
– Install the valves and open them as far
as possible.
– Measure the air volumes, fi rst the supply air
and then the exhaust air.
– differ by more than approx. 10% from the
nominal air volumes and the majority of
the deviations are in the plus range, adjust
the fan so that all the deviations are in the
plus range. If the majority of the deviations
are in the minus range, adapt all the devia-
tions so that they are all in the minus range.
Ensure also that a supply and an exhaust
valve remain fully open.
• Change the fan settings in the P menus P30 to
P37 via the CC Ease operating unit.
– Select the lowest possible setting in or-
der to minimise energy consumption.
– Ensure that the ratio of the air volumes be-
tween high, medium and low remains the
same.