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3. OPERATION
A = Gas economizer on/off
•
B = Water temperature selector
Fig. 15
3.a Function
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 mixers and thermostats.
This water heater, in contrast with other water heaters with a fixed
flame, has a modulation valve to optimise the water heaters opera-
tion. 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 "PROPOR-
TIONAL", able to change the gas consumption (modulating
the flame) to respond to the amount of water extracted.
Model 11p: for the extraction of 2.5 to 5.5 l/m the temperature of
the water supplied remains at 60°C, (in this case the has valve sup-
plies the burner with the necessary quantity of gas proportional to
the water supplied), above 5.5 l/m to 11 l/m the water temperature
varies from 60°C to 40°C.
Model 14p: for the extraction of 2.5 to 7 l/m the temperature of
the water supplied remains at 60°C, (in this case the has valve
supplies the burner with the necessary quantity of gas proportional
to the water supplied), above 7 l/m to 14 l/m the water temperature
varies from 60°C to 40°C.
3.b Usage
Ensure that the gas tap and all water taps are switched off
- 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 immedia-
tely before the water heater on the gas input pipe
- Rotate knob A to the on position (), press the knob down all the
way and keep it pressed
- Press the piezoelectric button (positioned on the left side of the
water heater) until the spark ignites the pilot flame. When it igni-
tes keep the knob A pressed for 20-30 seconds. If the flame does
not ignite repeat the operation until the flame remains on
- Rotate Knob A towards the large flame (
necessary to keep the knob pressed down lightly until the final
position is reached
- From this moment the device is able to produce hot water on
request. Opening the hot water tap causes the main burner to
be ignited, and inversely, by closing the hot water tap the main
burner is switched off; but the pilot flame remains switched on for
future requests
- If the main burner or pilot flame is accidentally turned off, the gas
valve automatically blocks the output of gas within 60 seconds
so to avoid any danger. To return the device to an operational
mode, repeat the steps above.
off position
activation position
minimum gas level
maximum gas level
), during rotation it is
A
The device is built to function with normal water pressure; in addi-
tion a temperature selector B is also supplied.
Rotate the knob completely to the left to obtain the maximum water
output or completely to the right for the minimum water output.
The machine is switched off by rotating knob A to the ( OFF)
position.
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 quali-
fied technician service the machine at least once a year.
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 is activated by rotating the knob (A) in-between
the minimum (small flame ) and maximum (large flame
sition.
Using the economizer limits the amount of heating when the hot
water usage is modest (water supplied is already warm or there is
a reduced usage, for example in 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.
4. MAINTENANCE
To maintain the machine at maximum efficiency, have qualified per-
sonnel perform a maintenance check at least once a year.
Before cleaning or performing maintenance, opening or disassem-
bling 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 (Fig. 16)
To remove the outer casing follow the steps below:
- Remove the selector Knobs (A and B)
9
B
) po-
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