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Instructions for the installer
3.10 Connection to electrical mains
The boiler is supplied with a three-poled power cable, already connected to the electronic board and it is provided with a safety clamp.
The boiler is to be connected to a 230V-50Hz electrical power supply.
When connecting it to power mains, follow correct phase / neutral polarity sequence.
Installation standards must be complied with and they are herein considered as entirely transcribed.
An easily accessible two-poled switch, with a minimum 3 mm distance between contacts, is to be installed ahead of the boiler. The switch is to
allow power supply cut-off in order to safely perform maintenance and service procedures.
Power supply to the boiler must be fitted with a residual-current circuit breaker having suitable disconnection capacity. Electric power supply
must be properly earthed.
The above mentioned safety measure must be verified. If in doubt, ask a qualified technician to thoroughly check the power network.
WARNING
The manufacturer cannot be held responsible for any damage caused by failure to earth the system correctly: gas, water, or CH
system pipes are not suitable for grounding power networks.
3.11 Connection to ambient thermostat (optional)
The boiler is designed to be connected to an ambient thermostat (optional, not compulsory).
Ambient thermostat contacts must be properly sized in compliance with a load of 4 mA at 20 Vdc.
The ambient thermostat cables must be connected to terminals (3) and (4) of the electronic board (see
Wiring diagrams
on page
49
) after
eliminating the jumper supplied as a standard with the boiler.
The ambient thermostat cables are not to be grouped together in the same sheath as power mains supply cables.
3.12 Installation of the ambient probe (optional)
Boiler can be connected to a probe measuring the ambient temperature (optional - not compulsory, supplied by the manufacturer).
If an ambient probe is installed, then it will not be possible to install an external probe.
WARNING
Only original ambient probes supplied by the manufacturer must be used.
If non-original ambient temperature probes are used, correct operation of the boiler and probe cannot be guaranteed.
The ambient temperature probe must be connected by means of a double insulated wire, minimum cross-section 0.35 sq.mm.
The ambient probe must be connected to terminals (1) and (2) of boiler electronic board.
WARNING
The ambient temperature probe cables must NOT be routed together with power cables.
To install the ambient probe follow the instructions supplied with the probe.
The ambient probe must be installed on an indoor wall at a height of approximately 1.5 m from the floor and in a suitable location for
measuring ambient temperature: do not install in recess or corners, behind doors or curtains, and install away from heat sources, direct
sunlight, air draughts and water sprays.
The ambient probe automatically modifies the CH flow temperature in relation to:
• Measured ambient temperature.
• Set ambient temperature.
The ambient temperature is set using CH +/- buttons that, with ambient probe installed, no longer work to set the heating water temperature.
Through boiler parameter P29 it is possible to display the value of the ambient temperature detected by the probe.
Summary of Contents for minorca kr
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