29
Instructions for the installer
3.8 Hydraulic connections
3.8.1
Central heating
Prior to installing the boiler, the hydraulic system is to be cleaned in order to remove impurities; they could be present in system components
and damage the pump and the heat exchanger.
The CH outlet and return pipes must be connected to the respective 3/4” connectors M and R on the boiler (see Fig. 5 Paper template).
When calculating the cross section of CH system pipes, bear in mind load losses induced by radiators, thermostatic valves, radiator gate valves,
and the configuration of the system itself.
WARNING
It is advisable to convey the discharge flow of boiler safety valve to the sewer system. Should the above precaution not be
implemented and the safety valve be activated, boiler room flooding may occur.
The manufacturer shall not be held responsible in case of damage to people, animals, or property due to failure to follow the
above mentioned instructions.
3.8.2
DHW
Prior to installing the boiler, the hydraulic system is to be cleaned in order to remove impurities; they could be present in system components
and damage the pump and the heat exchanger.
Cold water inlet and DHW outlet shall be connected to the boiler through the dedicated 1/2" F and C fittings (see Fig. 5 Paper template).
Hardness of water supplied to the boiler may increase the plate heat exchanger cleaning/replacement intervals.
WARNING
Depending on the hardness of the mains water supply, ascertain whether or not to install appropriate domestic water treatment
systems using water treatment products suitable for drinking water and compliant with the regulations and standards in force in
the country of installation.
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
components in the system.
3.9 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.
Содержание DELFIS Monothermal
Страница 46: ...46...
