9
5.
Regulation
5.1
Control, security and regulating elements.
As a standard the boiler is delivered without the supreme regulation and is equipped with a control panel incl.
a network module.
The manufacturer doesn’t recommend to operate the boilers without the supreme regulation. The standard
version (without the regulation) is designed for the customers who have their own boiler control system.
Besides the network module in the control panel there is mounted an instrument cluster - thermomanometer
The network module is equipped with the elements as follows:
-
The main switch with signalling
-
Temperature excess signalling (safety thermostat and combustion gases reflux fuse)
-
Automatics unblocking incl. the fault signalling
-
safety thermostat unblocking (at the open systems keep the setting from the manufacture it means
97 °C, at the closed systems with a pressure expansion reservoir can be set up to 105°C)
-
the combustion gases reflux fuse unblocking (set to 75 °C)
-
the boiler thermostat (as a standard it is delivered in the range between 0 and 85°C)
-
the sensor of combustion gases reflux fuse is positioned in the horizontal draught diverter and in case
that there is an insufficient flue gas installation the sensor switches off the boiler. The sensors of both the
boiler and safety thermostats of the thermometer and manometer clack valve are installed in the basin
(in the upper part of the left outer section).
At request there is delivered to the boiler one of four kinds of regulation or their combinations
according to the ordering key stated in chapter no. 1.1. The regulators are delivered in a separate
package and in place of boiler installation they are mounted into the control panel as directed. The
vacancies in the panel are in a standard delivery equipped with blind flanges.
The most important characteristics of Landis&Staefa regulators:
•
an equitherm regulation
•
a quick attenuation and a quick change in heating medium temperature (a quick attenuation and a quick
firing)
•
The summer/ winter operation is switched-over automatically
•
The boiler is unloaded when being started
•
The boiler is protected against overheating (the pump after-running)
•
The boiler heating water minimum and maximum values (heating water temperatures at the boiler
output) are set
•
An antifreeze protection is guaranteed for plant and equipment
•
The pumps protection by their regular starting.
•
The heating time schedule programme (can be programmed separately every day during the week)
•
The possibility of mutual co-operation among up to 16 regulators of RVA series
•
In case that the ether QAA50 or QAA70 indoor gadget is connected there is the possibility of boiler
remote control and there is guaranteed the adaptation of heating curves depending on the building
structure and the heat demand
On the top of it the RVA 33.121, RVA 43.222 and RVA 63.280 regulators have:
•
The function of a "chimney sweeper " – the boiler is automatically put into operation for required
measurement of combustion gases – the boiler is operated in full swing regardless the set automatic
regime.
•
Registration of running hours and number of burner starts.
