10
Other kinds of information shown on the display:
Using service buttons (buttons in the top left corner; right arrow „
“ – step forward, left arrow „
“ –
step backwards) you can see these parameters in this order:
1.
The set temperature of the heating water
(
+ °C + flashing value).
2.
The real temperature of the heating water
(
+ °C + the value).
3.
The set temperature of DHW *
(
+ °C + flashing value).
4.
The real temperature of DHW *
(
+ °C + the value).
5.
Outside temperature **
( + °C + the value).
6.
Weather compensation curve change **
( + the value).
7.
Back to standard display
The value in numbers is shown with the relevant symbol for 10 seconds after you stop making steps.
Then again the display returns to the standard mode.
(*) – For „X and XZ“ boilers there is no value displayed (the display shows “- -“)
(**) – These parameters are displayed only when the boiler operates in the weather compensated mode
(and when the outside temperature sensor is connected and not damaged).
When the boiler is controlled by QAA 73.110 room regulator with IU02Q interface the
communication Open-Therm is signalled by top arrows in the display corners „
“
, when it is a
communication of a cascade (IU04.10 and IU05Q) it is signalled by bottom arrows „
“
.
♦
Maintenance
Regular maintenance is very important for reliable operation, long life and combustion efficiency.
We recommend the user to contact the local service company and to agree on regular yearly boiler
checks. (see also Conditions for guarantee claims). A service technician can e.g. check the control and
safety elements of the boiler, check the gas and water installations or clean the burner and exchanger.
It is also necessary to check the pressure of cold water regularly. If the pressure is low it is vital to
refill the heating system.
The user can clean the outside case with a cloth dipped in soap water and then dry it.
7. GAS FITTING SIT 845 SIGMA
Sampling points for gas pressure measuring:
Gas fitting SIT 845 SIGMA is equipped with two sampling extensions for gas pressure measuring
(see the picture). The extensions are standardly equipped with tightening screws, which are to be
loosened for measuring. After the measuring they have to be carefully tightened again (the recommended
tightening moment is 1 Nm).
Inlet gas pressure
Outlet gas pressure
