14
ARTÙ 2
3.a Functioning
The initial commissioning of the water heater service must
be performed by qualified personnel.
The water heater is used for the production of instant hot water. The
removal of hot water can be preformed by multiple taps.
By turning on the relative tap, the main burner switches on heating
the water that passes.
These devices with a modifiable flame are particularly suited for
usage with mechanical and thermostatic mixers.
This water heater, in contrast with other water heaters with a
fixed flame, has a modulation valve to optimise the water heaters
operation.
It allows for the water to be heated using less water pressure and
gas by modulating the flame according to the amount of water used,
maintaining the water extracted at a constant temperature.
The water heater uses automatic variation that is
“PROPORTIONAL”, able to change the gas consumption
(modulating the fl ame) to respond to the amount of water
extracted.
This device is equipped with an electronic tool that is powered by
two 1,5 V batteries (D-Type model) that automatically switches on
the pilot flame and then the burner every time that hot water is
extracted.
The flame is switched on using a card that ionizes the flame.
3.b Usage
- Ensure that the gas tap and all water taps are switched off.
- Open a hot water tap in order to drain the water for a few seconds,
then close it again.
- Turn on the main gas supply tap or that of the gas tank if using
Liquefied Petroleum Gas (L.P.G.).
- Open the gas tap, not supplied with the device, placed immediately
before the water heater on the gas input pipe.
- The appliance is provided with a gas selector “
A
” that adjusts the
flame power between a minimum and a maximum by altering the
gas flow rate.
- To power on the water heater counterclockwise turn the selector
“
A
” position it on the “
” symbol (fig. 8B).
With the “
A
” selector in this position the water heater is turned
on with the flame to the minimum, continuing on the rotation the
flame increases until it reaches the maximum in correspondence
with the “ ” symbol
(fig. 8A).
- When hot water is requested, the device automatically turns on
the pilot flame, this lights the main burner and the pilot flame
switches off.
- During this phase the “
C
” lights up showing the instantaneous
water temperature.
- When the hot water request has terminated (turning the water tap
off) the main burner and the display automatically switche off, the
device then awaits another heating request.
If after 60 seconds it does not switch on, the flame detector interrupts
the flow of gas and blocks the device.
The water heater switches on automatically with the water tap
opening. If there is only noise without flame, immediately turn off
the water, wait 10 seconds and try again.
At first power on, or after a long period of non-use of the
appliance, it might be necessary to repeat the above operation,
in order to eliminate air in the pipes.
The blocking situation requires a manual intervention; to put the
device into operation, close the tap water drain, then reopen it so
that the power-on sequence automatically restarts.
If the main burner accidentally switches off, the device will attempt
to turn it on again. If within 60 seconds the device does not function
it is blocked.
In case of ignition electrode fault the gas flow stops, it is thus realized
the situation of Positive Security.
The device is built to function with normal water pressure; in addition
is also supplied a temperature selector
“
B
” which regulates the hot
water temperature by changing the flow rate.
Turn the temperature selector “
B
” fully counterclockwise to get
maximum supply of water (minimum temperature, fig. 8E); rotate
the temperature selector “
B
” fully clockwise, to obtain the minimum
water supply (maximum temperature, fig. 8D).
The machine is switched off by rotating knob “
A
” to the “
”
position (fig. 8C).
When the water heater is not used for long periods close the gas
supply tap or the LPG gas valve on the tank.
For the best operational results it is recommended to have a qualified
technician service the machine at least once a year.
Using the gas economizer
The device is equipped with a gas economizing device which is
used to choose the temperature of the water so it may be supplied
at the temperature necessary while saving gas.
The economizer device is inserted by turning the knob“
A
” until the
achievement of the “
” position (fig. 8B)
. The placement of the
economizer allows you to limit the maximum heating power supplied
when the needs of use should generally be contained (low heat or
small jump-course sampling such as during the summer).
DANGER OF FREEZING
If there is a possibility that the area where the device is stalled
could reach below 0°C, the device must be emptied of all water
contained, in this way:
- turn off the gas and the water inlet taps
- remove the batteries
- position the water temperature selector to the minimum
- open the hot water tap in order to drain all the water and then
close it again.
4. MAINTENANCE
To maintain the machine at maximum efficiency, have qualified
personnel perform a maintenance check at least once a year.
Before cleaning or performing maintenance, opening or disassembling
the panels, switch off the device and turn off the gas supply. Check
the main burner and the pilot flame, the ignition electrode, the safety
valve and that there is no leakage. Check that there is nothing
obstructing the passages within the exchanger smoke channel.
To clean the outside of the panels utilize a cloth with soap and
water.
Do not use solvents, powders or abrasive sponges.
Do not clean the device and/or its parts with flammable materials
(e.g. petrol, alcohol, diesel etc.).
4.a Removing the casing
To remove the outer casing follow the steps below:
- remove the 2 screws (
A
, fig. 9)
fig. 9
A
- disconnect the 2 display connectors
B-C
(fig. 10)
fig. 10
B
C
