System; Heating Fittings; Heating Circuits; Domestic Water (Hot Water Tank) - Baxi Bioflo Installation & Servicing Instructions Manual

For the Installer
2.5

System

The boilers are designed and approved as heat generators for hot water heating systems with a permissible
flow temperatures of up to 90°C. The maximum flow temperature is factory-set at 75°C. They may be installed
only in sealed systems.

2.5.1 Heating fittings

Safety valve 2.5 bar
(in BAXI Bioflo under the front cover as standard)
The safety valve is type-tested (code letter "H"). Only safety valves of this kind are allowed to be used. The drainage
line from the safety valve must be provided by the client. The line can be routed backwards on the left side
between the pellet reservoir container and the left side panel – Fig. .11
Break out the cut-out on the rear wall.Please note:
- Have the function checked by an expert on start-up and at least once a year.
Break out the cut-out in the rear wall
Drain line from safety valve
Fig. 11 Drain line from safety valve
Expansion tank:
An expansion tank must be installed in water heating systems in accordance with the technical regulations. The size
of the expansion tank depends of the parameters of the heating system and must be calculated on a case-by-case
basis. The flat pressure expansion tank installed in BAXI Bioflo versions is designed for a feed pressure of 1.0 bar
and a content of 12 l.
An additional expansion tank must be provided by the client if this volume is not sufficient.
Pressure gauge
(in BAXI Bioflo at the front behind the cladding door as standard)
The system pressure should be at least 1 bar. Check the system pressure, more frequently at first and then twice
a year later on.
Bleeder valve:
Installed as standard in all boilers under the front cover. Also have a manual ventilation function behind the
left side panel at the feed above the circulation pump.
Low-water cut-off:
A low-water cut-off is not required for systems providing up to 300 kW nominal thermal output, if it can be
assured that excess heating will not result from a lack of water in the system.
The boilers are equipped with an electronic temperature regulator and a type-tested safety temperature lim-
iter.
If the boiler is above the radiators, then a low-water cut-off must be installed.
:
:
15