Switching The Supply Fan On And Off; Setting A Overrun Timer For The Rfz - Zehnder ComfoAir Basic Benutzerhandbuch

2.4 Switching the supply fan on and off

When required, the supply fan of the unit can be
turned off manually. This may be desired to keep
out unpleasant odors from outside. Bear in mind
that switching off the supply or exhaust fan will
temporarily immobilize your dwelling's balanced
ventilation system, so do not forget to turn the
supply fan on again. How to switch the supply fan on
or off on the present operating device can be found
in the document of the operating device.
When can the supply fan not be turned off on the
display?
To prevent air being sucked back from the chimney
of a fireplace the unit is fitted with an open
fire programme. When needed the installer or
maintenance mechanic can turn this programme on.
If the open fire programme is turned on the supply
fan cannot be turned on or off manually.
When can the supply fan not be turned on?
The supply fan cannot only be operated manually
but can also be controlled automatically by the unit
itself. This occurs in the winter to protect the unit
from freezing. If the supply air is too cold for the
unit, the unit will automatically switch the supply fan
off. In this case the supply fan cannot be turned on
manually.
Action on Reaction on
display display
1 Press and hold
for at
least 3 seconds
2 Press and hold
for at
least 3 seconds
The supply fan will not automatically
turn back on. Do not forget to turn
the supply fan back on later on.
*** The displayed settings are the standard setting of the unit. This may differ from the actual setting of the unit.

2.5 Setting a overrun timer for the RFZ

Explanation
The supply fan is
turned off.
The light above the
button turns green.
The supply fan is
turned on.
The light above the
button turns green.
The ventilation setting can be increased for a set
time using one button on the RFZ. This can be
usefull when additional ventilation is needed for a
short time like during cooking and showering. How
to switch the overrun timer on or off can be found in
the document of the RFZ. The RFZ has two overrun
timers which must be set separately.
The overrun timer for briefly pressing the RFZ must
be set in P-menu 25. This timer can be set between
1 minute and 10 minutes.
The overrun timer for pressing and holding the RFZ
must be set in P-menu 26. This timer can be set
between 1 minute and 120 minutes.
Action on Reaction on
display display***
1
Press
2
Press
3
Press until
P25 or P26
appears
4
Press
5
Press
Or press
6
Press
Press
7
Press
8
Press
Explanation
The main P-menus
are being entered.
The sub P-menus of
the selected P-menu
are being entered
The different sub
P-menus of the
selected P-menu are
being displayed.
The selected
P-menu is being
entered.
Time delay is
increased with 1
minute.
Time delay is
decreased with 1
minute.
Time delay is
confirmed and
returned to the sub
P-menus of the
selected P-menu.
Old settings are
restored and
returned to the sub
P-menus of the
selected P-menu.
Returned to the
main P-menus.
Returned to the
default screen.
9 - EN