- 25 -
OPERATION
The following functions can be allocated to the pro-
grammable key via the setting
KonfigEingang (QAA 73 setting : 614 ):
- 0: The programmable key function is not used.
- 1: Default, modem function enabled, if the contact
(X10-04) is closed; disabled if the contact is
open.
- 2: Modem function disabled, if the contact (X10-
04) is open; enabled if the contact is closed.
- 3: Hot air curtain function enabled, if the contact
(X10-04) is closed.
Hot air curtain function (swimming pool):
This function enables the boiler setting to be raised
to its maximum value.
It can be enabled in summer and winter modes.
- Modulation of the burner output is maintained.
- Domestic hot water priority is maintained.
- This function is enabled when the contact is
closed.
- There is no effect on the control of a modulating
pump.
Modem function:
The modem function allows the boiler to be placed
on "standby" or to be switched off via the telephone.
All protection functions (e.g. anti-freeze function,
pump kick) remain active.
On the other hand, when this function is activated,
some of the other functions are not ensured:
- The antifreeze function of the installation is not
guaranteed.
- The anti-legionella function of the unit is no longer
used.
The automatic summer/winter switching function
enables summer mode to be switched to winter
mode (and vice versa) throughout the year without
the need for any intervention.
The heating is shut down (when switching from win-
ter mode to summer mode) when the average outsi-
de temperature measured over the preceding 24
hours is over the +1°C setting, namely 20°C.
The heating is also started up again (when switching
from summer mode to winter mode) automatically
when the average outside temperature measured
over the preceding 24 hours is below the -1°C set-
ting, namely 18°C.
- Note:
The switchover setting is set to 19°C and can only
be changed by using the QAA 73 room sensor.
The automatic mode must obviously be activated
on the boiler as well as on the QAA 73 room sen-
sor for the automatic summer/winter switching to
be available.
This function is activated by default in the QAA 73
basic configuration.
3.12 - LMU programmable key
3.13 - Automatic summer/winter switching
(only activated with outside sensor)
Summary of Contents for THI 5-25c
Page 62: ... 77 NOMENCLATURE THI 5 25 C ...
Page 65: ... 98 NOMENCLATURE CONTROL BOX ...
