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31Instructions for the Installer
Menu P5 ! Setting additional control functions
Values for additional control functions
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P50 Activation of
the chimney sweep control system.
0 (= No) 1 (= Yes) 0
P51 Indicate whether
preheater is installed.
0 (= No) 1 (= Yes) 0
Note:
change only if a preheater was subsequently installed.
If the MTD-ERV 350 has to be reset to the works settings via P75, a subsequently installed
preheater will be reset as standard to "ABSENT".
• Check the presence of the preheater after a general reset via menu P75.
P52 Setting the
preheater control.
v Level 0
Particularly safe setting.
v Level 1
Safe setting.
v Level 2
Nominal setting.
v Level 3
Economy setting.
0 3 2
Note:
ThePREHEATERISSWITCHEDONEARLIESTWITHTHEparticularlysafesetting.Thislevelthusoffersthe
greatest safety for maintaining balanced ventilation. On the other hand, the preheater is
switchedonthelatestintheECONOMYSETTING.Thislevelthusofferstheleastsafetyformaintain-
ing balanced ventilation.
During commissioning of the MTD-ERV 350 the preheater control can generally be left on
Level 2:NOMINALSETTING(=workssetting).Onlyinareaswith coldwinters(withdaytimetem-
peraturesregularlyapprox.-10°Corbelow)shouldLevel1:SAFESETTINGorevenLevel0:PARTICU-
LARLY SAFE SETTINGS be selected.
Values for additional control functions
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P53 Indicate presence of an extractor hood.
Note:
If an extractor hood is connected to the
ventilation system, the user can set the
ventilation levels for the extractor hood
via P29.
0 (= No) 1 (= Yes) 0
P54 Indicate presence of a bypass.
Note:
The MTD-ERV 350 is equipped with a by-
pass as standard. The value can therefore
be left at '1'.
0 (= No) 1 (= Yes) 1
P55 Indicate presence of a post-heater. 0 (= No) 1 (= Yes) 0
P56 Setting the necessary air volume for the
dwelling.
• nL: "Normal air volume".
• HL: "High air volume".
nL HL nL
Note:
Setting the air volume in P56 (to "nL" or "HL") forms the basis for setting the air specifi cations
and hence for setting the fans. For further information, see section 4.5 and P30 to P37.