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2.8. Installation
When preparation is carried out installation may start. Its steps are:
(3) Adjust room thermostat to a temperature lower than of ambience.
(4) Apply voltage to the appliance: plug the cable of boiler into the wall socket.
•
The actual delivery water temperature appears in the display, showing range 3-91 ºC. (e.g.:
actual DWT is 58 ºC).
•
The pump starts to operate and carries out a 1 minute "pre-circulation".
•
The proper operation of electronics is signed by slow beat flash of yellow LED marked D9.
(5) Wait for pass of 1 minute. This 1-minute pre-circulation is carried out after each restart or
power failure. If there is not request for heating (on the part of room thermostat) the pump stops
after 1 minute.
(6) Adjust the required temperature of delivery water (required DWT (P))
Turn the knob (can be operated from outside) at the bottom of control box while checking display.
As an effect of adjustment the display changes from actual DWT (C) to required DWT (P) E.g.:
required DWT is 80 ºC.
•
Two seconds after finishing adjustment the display changes back to actual DWT (C).
(1) Adjust hysteresis of switching.
Explanation for hysteresis of switching: Heating turns off at the adjusted required temperature of
delivery water previously described in point (4) and turns on at a 10-25ºC lower ongoing
temperature to be adjusted now (provided there is a request for heating on the part of room
thermostat).
•
Turn potentiometer located on electronic panel and marked P1 by a screwdriver while checkig
the display. As a result of adjustment display changes from actual DWT (C) to hysteresis (H).
Hysteresis can be adjusted between 10-25 ºC (e.g.: hysteresis 15 ºC).
Two seconds after finishing adjustment the display changes to actual DWT (C).
(2) Adjust room thermostat to a requested temperature higher than the ambient temperature.
•
The pump and the main burner switch on and the boiler starts heating. Whether turn on or off
happen at the adjusted DWT can be checked in the display.
•
Proper operation is shown by quick beat flash of LED marked 9 located in electronic panel.
•
After each turn off of heating the pump carries out a 1-minute post-circulation and stops
unless DWT meanwhile dropped under the adjusted hysteresis value (and the room
thermostat keeps on requesting for heating). In this case turn on to heating happens
immediately and pump carries out not post-circulation but normal circulation, which is
simultaneous with heating.
•
In case of post-circulation LED D9 flashes in slow beat.
Notes for installation:
(1) Adjustment can only be done when there is not request for heating (on the part of room
thermostat) and the pump does not operate in mode pre- or post circulation (i.e. it does not
work), namely the boiler operates in standby mode!
(2) However adjustment of DWT potentiometer is effective during operation.
As an effect of adjustment the display changes from actual DWT (C) to required DWT (P).
