Radiant RK 50, User Manual

Page: 6 / 8

USER INSTRUCTIONS
4
■
D.H.W temperature control
(only with remote boiler)
The domestic hot water temperature is regulated by knob
3
(see “Control panel”).

Rotating the knob anticlockwise reduces the temperature.

Rotating the knob clockwise increases the temperature.

The range of temperature settings for the domestic hot water runs from a minimum of 35°C to a maximum of
60°C.
■
Topping-up the system with water
The water pressure in the central heating circuit must be checked during the entire period of operation of the boiler.
In this respect, the system pressure must not be less than 1 bar.
If there is insufficient water in the boiler, the code
H2O
will flash on the display (see “Control panel”) .
To bring the system back up to pressure, open the external filling loop valve until the system pressure reaches 1
bar and that the code H2O lights up.
When the operation is complete, close the fill valve.
Diagnostics – Error codes:
This paragraph contains a list of error codes that the boiler may generate on the display
8
(see “Control panel”)
together with the relative indications and the operations that the user can carry out to reset the boiler.
If the problem re-occurs after the following actions have been taken, call an authorised Service
Centre.
_
E01
_
Ionisation block
Code
E01
lit continuously on the display.
 Check that the gas valve on the boiler and gas meter are open and that there is gas in the mains supply (or in
the tank).
 Switch off then switch on the appliance using switch
1
(see “Control panel”) on the control panel.
 When the error code on the display disappears, the boiler will restart.
If the problem persists,
Call the Service Centre.
_
E02
_
Safety Thermostat tripped
Code
E02
lit continuously on the display.
Call the Service Centre.
_
E03
_
Flue Gas Thermostat tripped
Code
E03
lit continuously on the display.
Call the Service Centre.
_
h2o
_
Water Pressure Switch tripped
Code
H2O
lit continuously on the display.
 Check the water pressure in the central heating circuit. The reading on the pressure gauge, located on the
lower part of the boiler, must not be less than 1 bar .

If the pressure is less than 1 bar, top-up the system as described in paragraph “Filling the system”.
 The boiler will restart automatically.
If the problem persists,
Call the Service Centre.