Gas Connections; Water Connection; Anti-Freeze System; Emptying The Water Heater - Riello MINI 11 LN Installation And User Manual

Some basic rules apply to the use of any electrically powered component,
such as:
- do not touch the appliance with wet or damp body parts and/or bare
feet
- do not pull the electric cables
- do not leave the appliance exposed to elements (rain, sun, etc.)
- do not allow children or inexperienced individuals to use the appliance
- the appliance's power cable must not be replaced by the user.
Should the cable be damaged, turn off the appliance and seek assistance
from a qualified technician to replace it.
Should it be decided not to use the appliance for a certain period of time,
it is recommended that you switch off the power supply to all system com-
ponents that require electricity.
Should you need to replace the power cable, use the cable supplied by
the manufacturer or the technical assistance centre.

3.6 Gas connections

b
Prior to ignition, make sure that the appliance is set up to operate
with the gas available; this can be checked by the wording on the
packaging and by the adhesive label indicating the type of gas.
Establish the piping diameter according to the standards in force.
Before installing the appliance, it is recommended that you blow the gas
piping so as to remove any processing waste. Connect the appliance to
the internal system gas pipe and insert a tap upstream of the appliance to
isolate and turn on the gas.
Appliances operating with LPG and powered by gas cylinders with shut-
off and adjustment devices should be connected in such a way as to
guarantee the safety of people and the surrounding environment.
You should ensure compliance with the current standards.
When starting up the appliance for the first time, have the following con-
trols carried out by a qualified professional
- a check of the internal and external fuel conveyance system seal
- a check of the fuel flow rate according to the output required of the
appliance
- that the appliance is powered by the type of fuel for which it has been
set up
- that the fuel supply pressure is within the values shown on the label
- that the fuel supply system has been sized for the input necessary for
the appliance and that it is fitted with all of the safety and control devic-
es provided for by the standards in force.
b
In case of prolonged user absence from the appliance, shut off the
main appliance gas supply tap.
b
Do not use the gas tubes as an earthing system for electrical ap-
pliances.

3.7 Water connection

Connect the appliance to the water mains and insert a water isolation
valve upstream of the appliance (available on request).
Looking at the appliance head on, the cold water inlet is to the right and
the hot water outlet to the left.
b
The domestic hot water circuit does not need a safety valve, but
make sure that the pressure of water main does not exceed 6 bar.
In case of doubts, install a pressure reducer.
b
Ensure that the water system pipes are not used as earthing for
your electrical or telephone system. They are in no way designed
for this purpose. Using them in this way may cause serious damage
to the pipes and the appliance itself in a short space of time.
b
When installing outdoors only use metal connecting pipes and taps
and fittings since the use of an anti-freeze kit could damage mate-
rials other than those indicated.

3.8 Anti-freeze system

The water heater does not have automatic an-
1 Indoor models.
ti-freeze systems; when there is a risk of frost (temperatures lower
than 0°C), it should be emptied of the water inside it. When installing
in a partially protected place it is always necessary to use anti-freeze
systems to suitably protect the appliance from the risk of freezing.
Adequately protect the taps and the hydraulic connecting pipes of
the installation.
2 Outdoor models. The appliance comes as standard with an auto-
matic anti-freeze system that protects the domestic hot water circuit
from freezing in the event of ambient temperatures down to -10°C.
b
An electrical supply is required in order to take advantage of this
protection, implemented with electrically powered resistors with
heating wire. this means that any blackout or disconnection of the
power supply will deactivate the protection. The anti-freeze protec-
tion is active also with the appliance in stand-by.
b
The anti-freeze protects the water heater's domestic hot water cir-
cuit up to the hydraulic connections (domestic hot water inlet and
outlets). When installing outdoors it is necessary to adequately pro-
tect the hydraulic connection pipes and taps. In any event it is nec-
essary to adequately protect the taps and the hydraulic connecting
pipes of the installation.

3.9 Emptying the water heater

To empty the water heater:
- turn off the main water supply tap
- open all the water taps
- make sure that the taps at the lowest points of the system allow the
water heater to be completely emptied.

3.10 Gas conversion

Converting gas from one form to another can be done easily, even with
the appliance already installed.
b
The conversion should only be carried out by skilled and qualified
personnel pursuant to Min. Decree 37 of 2008, the provisions in
UNI 7129 and 7131 must also be respected.
The water heater is supplied to operate with methane gas (G20) or LPG
(G30/G31) in accordance with the indications of the product label.
The appliance can be converted from one type of gas to another using
one of the specific kits provided upon request:
- Methane conversion kit
- LPG conversion kit
Proceed as follows to perform the conversion:
- switch off the electrical supply
- remove in succession the casing, the air distribution box cover and the
combustion chamber cover
- disconnect the glowplug cable connection
- remove the lower cable grommet from its seat on the air distribution box
- disconnect the burner thermostat (I) removing the relative fastening clip
- fully unscrew the top nut of the gas valve train
- loosen the nuts (A) of the by-pass train
- loosen the nut (B) of the burner/flow meter train
- take out the clips (C) securing the trains to the burner
- disconnect the trains (D) from the burner
- unscrew the 4 screws (E) fixing the burner to the back board
- take out the burner (F), unscrew the screws (G) fixing the collector to
the burner (fig."Fig. 35" and fig."Fig. 36")
- from the conversion kit take the complete LPG collector and relative
LPG burner flange.
- fix the burner, the collector and the flange using the screws previously
removed. (fig."Fig. 37" )
See Fig. 35 and Fig. 36
ENGLISH
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