MYNUTE J R.S.I.
7
- overturn the control instrument panel towards the boiler front part
- open the card cover
- on the control card (fig. 4.5):
- if the conversion is from methane gas to LPG, insert the jumper in position
JP3
- if the conversion is from LPG to methane gas, remove the jumper from posi-
tion JP3
- reposition the components previously removed
- restore voltage to the boiler and reopen the gas tap (with boiler in operation,
check correct seal of the gas feeding circuit connections).
Conversion must be carried out by qualified personnel.
After conversion, adjust the boiler again following the indications in
specific section and apply the new identification label contained in
the kit.
5 MAINTENANCE
To ensure product characteristics and efficiency remain intact and to comply with
prescriptions of current regulations, it is necessary to render the appliance to
systematic checks at regular intervals.
Control frequency depends on the installation and use conditions, but it is therefore
necessary an annual check-up by the authorised personnel from the Technical
Assistance Service.
Turn off the appliance to carry out the maintenance of the structure near the flue
exhaust connections or devices, and their accessories. Once the interventions
are finished a qualified technician must check that the pipes and the devices
work correctly.
IMPORTANT:
before carrying out any cleaning or maintenance operation of the
appliance, use the appliance and system switch to interrupt power supply and
close the gas supply turning the tap placed on the boiler.
Do not clean the appliance or its parts with inflammable substances (e.g. petrol,
alcohol, etc.).
Do not clean panels, painted parts and plastic parts with paint thinner.
Panel cleaning must be carried out only with soapy water.
5.1 Check the combustion parameters
To carry out the combustion analysis, proceed as follows:
- switch off the boiler
- set the function selector to
(winter) (fig. 22)
- remove the housing and access the card
- insert the jumpers JP1 and JP2
- use a screwdriver to prise open the plug on the control panel (fig.22)
- bring the trimmer P2 to the maximum value, using a screwdriver (turn clock-
wise)
- remove the screw of the combustion analysis inlet cover (fig. 23) and insert the
probes
- power the boiler
The appliance works at maximum output and it is possible to check combus-
tion.
After analysis is complete:
- close the hot water tap
- remove the probe from the analyser and close the combustion analysis inlet
fastening carefully the screw previously removed.
USER
1A GENERAL WARNINGS
The instruction manual is an integral part of the product and it must therefore be
kept carefully and must accompany the appliance; if the manual is lost or damaged,
another copy must be requested from the Technical Assistance Service.
Boiler installation and any other assistance and maintenance operation
must be carried out by qualified personnel according to current local and
national regulations.
For installation, it is advisable to contact specialised personnel.
The boiler must only be used for the application foreseen by the manu-
facturer. The manufacturer shall not be liable for any damage to persons,
animals or property due to errors in installation, calibration, maintenance
or due to improper use.
The safety and automatic adjustment devices must not be modified, during
the system life cycle, by the manufacturer or supplier.
This appliance produces hot water, therefore it must be connected to a
heating system and/or a domestic hot water mains, compatible with its
performance and output.
In case of water leakage, close the water supply and contact the Technical
Assistance Service immediately.
In case of absence for long periods time, close the gas supply and switch off
the electrical supply main switch. In case of risk of frost, empty the boiler.
From time to time check that the operating pressure of the hydraulic system
does not decrease under 1 bar.
In case of failure and/or malfunctioning, deactivate the appliance, and do
not try to repair or intervene directly on it.
Appliance maintenance must be carried out at least once a year: program it
with the Technical Assistance Service will avoid wasting time and money.
Boiler use requires to strictly observe some basic safety rules:
Do not use the appliance in any manner other than its intended purpose.
It is dangerous to touch the appliance with wet or damp body parts and/or in
bare feet.
Under no circumstances cover the intake grids, dissipation grids and ventila-
tion vents in the installation room with cloths, paper or any other material.
Do not activate electrical switches, telephone or any other object that causes
sparks if there is a smell of gas. Ventilate the room by opening doors and
windows and close the gas central tap.
Do not place anything in the boiler.
Do not perform any cleaning operation if the appliance is not disconnected
from the main power supply.
Do not cover or reduce ventilation opening of the room where the generator
is installed.
Do not leave containers and inflammable products in the installation room.
Do not attempt to repair the appliance in case of failure and/or malfunction-
ing.
It is dangerous to pull or twist the electric cables.
Children or unskilled persons must not use the appliance.
Do not intervene on sealed elements.
For better use, remember that:
- a periodic external cleaning with soapy water not only improves its aesthetic
aspect but also preserves panelling from corrosion, extending its life cycle;
- if the wall-mounted boiler is enclosed in pendant furniture, leave at least 5 cm
for ventilation and maintenance;
- installation of an ambient thermostat will favour a greater comfort, a more
rational use of the heat and energy saving; the boiler can also be connected
to a programming clock in order to manage ignition and switching off during
the day or week.
2A IGNITION
First ignition must be carried out by personnel from the Technical Assistance
Service. At the same time, if it is necessary to put the appliance in service again,
carefully follow the described operations.
To start-up the boiler it is necessary to carry out the following operations:
- power the boiler
- open the gas tap present in the system to allow fuel flow
- turn the mode selector to the desired position:
summer mode - only active when the external storage tank is connected:
turning the selector to the summer symbol “ ” (fig. 2a), the traditional func-
tion (domestic hot water only) is activated, and the boiler supplies water at the
temperature set on the external storage tank. If there is a
domestic hot water
request, the boiler switches on and the boiler status indicator LED (1) lights up
with a fixed green light. The digital monitor (4) indicates the domestic hot water
temperature (fig.4a).
winter mode:
turning the function selector within the area divided into seg-
ments (fig. 2b), the boiler produces hot water for heating and - if connected to
an external storage tank - domestic hot water. If there is a heat request, the
boiler switches on and the boiler status indicator LED (1) lights up with a fixed
green light. The digital monitor (4) indicates the heating water temperature
(fig. 3a). If there is a domestic hot water request, the boiler switches on and
the boiler status indicator LED (1) lights up with a fixed green light. The digital
monitor (4) indicates the domestic hot water temperature (fig. 4a).
Adjust ambient thermostat to desired temperature (approximately 20 °C)
Adjustment of the heating water temperature
To adjust the heating water temperature, turn the knob with symbol “ ” (fig. 5a)
to the area divided in segments.
Adjustment of domestic hot water temperature
To adjust the domestic hot water temperature (bathrooms, shower, kitchen, etc.),
set the chosen temperature on the external storage tank thermostat: with every
heat request from the storage tank thermostat, the boiler supplies hot water for
preparing domestic water. On the control panel, the green LED (1 - fig.1a) flashes
with a frequency of 0.5 seconds on, 3.5 seconds off. The boiler is standby status
until, after a heat request, the burner switches on and the indicator LED turns
fixed green to indicate flame presence. The boiler will continue working until the
set temperatures are reached, or until the end of the heat request; it will then go
back to “standby”. If the red indicator light in line with the “
” symbol lights up on
the control panel, this means the boiler is in a stop mode (see the “Light signals
and faults” chapter). The digital monitor indicates the fault code detected (fig. 7a).
