Ventilation Requirements; Open Flue Boilers; Room Sealed Boilers; Heating Water Quality - Buderus Logano plus GB312 Installation And Maintenance Instructions Manual

3
Regulations
3.4

Ventilation requirements

Ventilation for combustion and cooling should be
provided in the boiler house in accordance with BS 6644
and IGE/UP/10. The tables below may be used for
guidance.
3.4.1

Open flue boilers

Opening free area sizes given in cm² per kW net.
% Load in Summer
50
75
100
Tab. 10
3.4.2

Room sealed boilers

Opening free area sizes given in cm² per kW net.
% Load in Summer
50
75
100
Tab. 11
B Never restrict or block ventilation openings. Keep the
ventilation openings clear at all times.
3.5

Heating water quality

As pure water cannot be used for heat transfer, water
quality is important. Poor water quality can damage
heating systems due to scaling and corrosion.
Water quality is an essential factor for
increased efficiency, functional reliability,
long service life and for maintaining the
constant operational condition of a heating
system.
B To verify the water quality, check for the
values listed in the "Water quality log".
3.6

Pipework quality

When using plastic pipes in the heating system, for
example in underfloor heating systems, ensure these are
impermeable to oxygen in accordance with DIN 4726/
4729. Ensure system separation by means of a heat
exchanger if the plastic pipes do not conform with these
standards.
NOTICE: Boiler damage through corrosion!
B Never operate this boiler as a gravity-fed
or as open vented heating system.
14
Low level High level
4 2
5 3
6 4
Low level High level
2 2
5 5
6 6
3.7

Frost protection

NOTICE: System damage due to frost!
B If there is the risk that a line might freeze
up when operating in room temperature-
dependent mode (e.g. radiator in a
garage), set the pump run-on time to
24 hours.
Logano plus GB312 - Subject to technical modifications.