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3.2.8. Plumbing connections
Prior to installing the boiler, the hydraulic system should be cleaned in order to remove impurities; they might be present in system components
and damage the pump or the heat exchanger.
CENTRAL HEATING
CH flow pipe and CH return pipe must be connected to their relevant 3/4” coupling on the boiler (see pic. 5).
When sizing CH system pipes, bear in mind load losses caused by radiators, thermostatic valves, radiator gate valves, and the configuration of
the system itself.
It is advisable to convey the discharge flow of boiler safety valve to the sewer system. Should that not be performed, and the
safety valve be activated, flooding of the room in which the boiler is installed may occur.
The manufacturer shall not be held responsible for any damage resulting from failure in observing the above mentioned technical
provision.
DOMESTIC HOT WATER
DHW flow pipe and water mains pipe must be connected to their relevant 1/2” couplings C and F on the boiler (pic. 5).
Hardness of water supplied to the boiler may increase heat exchanger cleaning and /or replacement frequency.
WARNING
Depending on hardness level of the water supplied, it might be necessary installing a suitable water treatment device for domestic use
and in compliance with applicable laws and standards.
Water treatment is always advisable when water supplied to the boiler is more than 20°F hard.
Water supplied by commonly marketed water softeners, due to PH level induced in water, may not be compatible with some compo-
nents in system.
3.2.9. Power mains connections
The boiler is supplied with a three-poled power cable, already connected to the electronic board and it is provided with an anti-rupture firming
clamp.
The boiler is to be connected to a 230V-50Hz electric power supply.
Comply with phase / neutral polarity sequence when power connecting the boiler.
Installation standards must be complied with and they are considered as an integral part of this booklet.
An easily accessible two-poled switch, with a minimum 3 mm distance between contacts, is to be installed outside 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 differential magnetic-thermal automatic switch of 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 shall not be held responsible for any damage due to failure in grounding the system: gas, hydraulic, or CH
system pipes are not suitable for grounding power networks.
3.2.10. Room thermostat connection (optional equipment)
The boiler is designed to be connected to an ambient thermostat (not supplied with the boiler).
Room thermostat contacts must be properly sized in compliance with a load of 5 mA load at 24 Vdc.
Ambient thermostat wiring must be connected to the relevant terminal board (see electric layout), after removing the
jumper supplied as standard with the boiler.
The ambient thermostat wirings are NOT to be grouped together with power mains supply cables.
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