40
2.6.6 CHRONOTHERmOSTAT OF A DIFFERENT bRAND
The Rinnai boiler can work by connecting a chronothermostat (optional). Or it can work by connecting a chronothermostat
(optional), keeping the Rinnai WiFi chronothermostat connected: in this second configuration the Rinnai command
transfers the room temperature control function to the optional chronothermostat. In order to connect the room
thermostat of another brand to the boiler’s electronic board, a special connector (blue) is supplied as standard.
Installation of the chronothermostat (of a different brand)
Isolate the appliance electrically by disconnecting it from the electrical
socket:
•
remove the front panel from the boiler body taking care not to damage
the pressure gauge, first lifting it upwards and then moving it away
from the boiler body;
•
remove the protective cover of the main electronic board (PCB) and
connect the supplied cable to the CN17 port at the top right of the PCB;
•
insert the cable through the holes provided in the lower part of the
appliance casing and connect the secondary room chronothermostat
to the cable installed;
•
check that the type of chronothermostat connected is in ‘open contact’:
if it is a ‘closed contact’ type it is necessary to modify the
parameter
nr.14 of menu B
;
•
close the PCB protection cover and assemble the front panel;
•
electrically power the appliance, switch on the remote control and
activate the heating function by pressing the button
: the boiler
must be set on ‘flow temperature’mode (
); check if it operates
correctly.
2.6.7 FILLING THE SySTEm
Once the hydraulic, gas and electrical connections have been completed and the drainage system is connected,
proceed with filling the boiler heating circuit by opening the special tap at the base of the boiler.
IMPORTANT
The filling of the circuit must be carried out in a very slow way:
this prevents the
formation of air bubbles that cause slowdowns in the commissioning of the system and can cause
more problems in the initial phase of use.
Once the boiler has been installed, before operating it, always make sure that the system is filled
correctly and that the pressure gauge on the front panel indicates, when the heating circuit is still
cold, values from the green sector (0.5 ÷ 1.5bar). In case of necessity, restore the correct values by
operating the appropriate tap at the base of the boiler.
The boiler has a vent valve built-in, on the circulation pump: make sure the valve cap is loose and
free to vent air.
Open the bleed valves of the hydraulic system and the radiators, bleeding air until only water
comes out.
By connecting the power supply cable, the boiler performs an automatic venting cycle of 60-120
min (and some internal control operations): during this phase, you do not have to press any button
on the remote control until the cycle is completed (during this phase some symbols may light up
on the display and/or disappear).
At the end of the venting cycle it is possible that the system pressure has fallen below the minimum recommended
value: restore the correct value by acting on the load tap.
If the deaeration cycle is not sufficient to expel most of the air in the system, it is suggested to disconnect the power
supply cable and reconnect it to repeat the boiler vent procedure.
In the first uses and with a certain regularity it is advised to check that the pressure gauge on the front panel always
indicates a normal pressure value: if necessary top up the system by operating the filling valve and restore the system
pressure.
Cable (blue) to connect
the room thermostat
(of different brand)
Blue cable hole
Plug CN17
(Blue)
Latches
Main electric board
Removing the front panel
①
②
