Possible Problems And Their Causes; Converting The Water Heater To Other Types Of Gas - Immergas CAESAR ECO 11 Instructions And Warnings

3.4 POSSIBLE PROBLEMS AND THEIR
CAUSES.
N.B.: maintenance operations must be carried
out by an authorised company (e.g. Authorised
After-Sales Technical Assistance Service).
Refer to paragraph 2.5 for information regarding
faults and display signals.
- Smell of gas. Caused by leakage from gas circuit
pipelines. Check tightness of gas intake circuit.
- Irregular combustion (red or yellow flame).
Can be caused by: dirty burner, clogged lamel-
lar pack, intake - exhaust terminal not installed
properly. Clean the above components and
ensure correct installation of the terminal.
- Frequent trips of the overheating temperature
or safety thermostat. It can depend on an
anomaly on the water heater P.C.B. or and
anomaly of the regulation NTC probe.
- Poor water flow: if, as a result of limescale
(calcium and magnesium), the domestic hot
water system does not work properly contact an
authorised company for descaling e.g. Authorised
Technical Assistance Service according to good
practice. To preserve integrity and efficiency of
the heat exchanger, a non corrosive descaler must
be used. Cleaning must be carried out without the
use of tools which can damage the heat exchanger.
3.5 CONVERTING THE WATER HEATER
TO OTHER TYPES OF GAS.
The operation of appliance transformation from
a gas family to another can be easily carried out
even if the appliance is installed.
Instructions regarding the transformation and
adjustment of various types of gas are described
below.
Attention: please note that transformation op-
erations must be carried out by professionally
authorised and qualified staff, in compliance with
the technical regulations in force.
Switch off the device from the omnipolar switch
provided on the power supply line and close the
gas and water cocks.
- Remove the casing by referring to the specific
chapter;
- remove the wire spring placed on the cold water
pipe (Part. A Fig. 30);
- disconnect the gas pipe and remove it (Part.
B Fig. 30):
- loosen the three screws shown in Fig. 31 lower
the intermediate metal-sheet plate (Fig. 32);
- loosen the side fastening screws of the mani-
fold, remove the side brackets and extract the
gas manifold (Fig. 33);
- replace the manifold.
Attention: the manifold is already equipped
with injectors, it is therefore not necessary to
replace them.
- Reassemble the components proceeding in
reverse order;
- if there are seals, they must be restored.
Parameter change 02 (type of gas)
Start the appliance and access the Parameters
menu (
), as follows:
- with the water heater on, press the reset button
( ) for approximately 10 seconds. The sym-
bols on the display will start flashing and first
( ) will be displayed, followed by (
21
- release the reset button;
- enter the code ( ) by turning the knob and
confirm by pressing reset;
- turn the knob to select (
and confirm by pressing reset;
- on accessing the Menu, scroll through the list
with the knob until finding parameter 02 (gas
type), and press reset: the value that can be
reset will flash and it will be possible to select
the type of gas required by turning the knob:
0 (MTN) - 1 (LPG);
- if LPG gas is selected, propane gas is selected by
default. If you require butane gas, set parameter
13 to 2;
- save by pressing the reset button.
After the procedure, the appliance displays alarm
AL62, which indicates that you must calibrate
the gas valve.
Attention: the menu is exited automatically after
5 minutes of inactivity, or by pressing the reset
button for a while.
Gas valve calibration
The gas valve must ONLY be calibrated by the
Authorised After-Sales Service.
For the procedure, refer to the instructions sheet
in the gas exchange kit.
B
);
) (Parameters menu)
A
30