STIEBEL ELTRON VRC-W 400 - Page 21

INSTALLATION
Settings
ENGLISH
www.stiebel-eltron.com VRC-W 400 (E) | 21
 Enable preheating Off
On
 Frost protection mode Outdoor air reg.
Supply air reg.
Passive house reg.
 Condensate prevention (A2)
 Enable condensate prevention Off
On
 Offset condensate prevention K
 Enable fan Off
On
 Ventilation unit
 Device software version
 Device software patch
 Term. device serial no.
 Device type
Settings
 View
Standard (A0) The only parameters displayed are those that have been re-
leased for the appliance user and can therefore be accessed
without a code.
Service (A1) Parameters for qualified contractors: Code "1000"
Expert (A2) Parameters for service department.
f To access actual values and parameters which are reserved
for qualified contractors, enter the code "1000" for "View".
Press "OK".
"Service" is shown on the display, when this is entered correctly.
If you switch to the actual values or parameters, you see the en-
abled parameters.
Note
After entering the code, switch to the menu by pressing
the "MENU" button. If you first switch to the home screen,
the parameter block is reactivated.
 Fan control
Use this parameter to switch fan control between "Constant flow
rate" and "Constant pressure".
Effect
Constant flow
rate
The appliance maintains a constant flow rate for both fans.
The unit works with the set values set for "Flow rate, stage
0" to "Flow rate, stage 3".
Constant pres-
sure
The appliance maintains a constant pressure at the extract
air fan. The unit regulates the pressure at the extract air
connection to the set values set for "Diff. pressure, stage 0"
to "Diff. pressure, stage 3". The flow rate that is established
there is used as the set value for flow rate control of the
supply air fan. "Supply air flow rate offset" is also included.
Note
If you change over the "Fan control" setting, the unit re-
starts.
 Air flow rate
 Supply air flow rate offset
Use this parameter to adjust the supply air flow rate during com-
missioning. The offset refers to standard ventilation and is con-
verted internally as a percentage for the other fan stages.
Example
Nominal flow rate (stage2) m³/h 200
Offset m³/h 40
Stage Set
flow
rate
Off-
set
Set flow
rate + off-
set
Offset fac-
tor
internal set flow

offset factor
0 60 60*1.2 = 72
1 140 140*1.2 = 168
2 200 40 200+40 = 240 240/200 = 1.2 200*1.2 = 240
3 260 260*1.2 = 312
 Humidity prot.
 Enable humidity control
With humidity-dependent flow rate control, the air flow rate is
increased or decreased depending on the humidity level.
Parameter Effect
Off inactive
On active
 Humidity prot. interval
If you set fan stage 0, the appliance switches to a 24 hour dormant
phase. Only after this will humidity protection control start.
The unit measures the humidity of the extract air for the time set
for "Humidity capture delay". The unit compares the last meas-
ured value with the limit value set for "Humidity threshold". If
the humidity threshold is exceeded, the unit starts to ventilate.
If the humidity threshold is undershot again, the unit terminates
ventilation. At this point, the Humidity prot. intervalstarts again,
at the end of which the moisture is measured.
 Humidity capture delay
The unit measures the humidity of the extract air for the time set
for "Humidity capture delay". The unit compares the last measured
value with the limit value set for "Humidity threshold".
344462-45598-9853_VRC-W_400_E_en_fr_it_nl.indb 21344462-45598-9853_VRC-W_400_E_en_fr_it_nl.indb 21 07.07.2023 17:00:1907.07.2023 17:00:19