5
Boiler installation
Logano G234X – 6 720 804 886 (2012/08)10
5.2 Connecting the heating system
This section explains how the boiler is connected to the heating system.
5.2.1 General safety instructions
Fig. 8 Low-water cut-off
[1] Boiler
[2] Panel radiator
[3] Heating system with low-water cut-off
[4] Heating system without low-water cut-off
5.2.2 Connect the central heating supply and return
NOTICE: Risk of boiler damage due to moisture!
▶ Protect the individual components of the control
system and the ignition system from damp (dripping
water, water spray, rain) during installation,
operation and servicing (e.g. pump replacement,
programmer replacement, etc.
NOTICE: Risk of system damage due to overheating as a
result of lack of water!
▶ Make sure that if the boiler is located above the level
of the heating system, it is fitted with a low-water cut-
off.
▶ The low-water cut-off must be used when the boiler is
installed ( Fig. 8).
NOTICE: Risk of system damage due to high
temperature variations in the heating system!
▶ If the boiler is operated in conjunction with an air
conditioning system, it is essential to ensure that the
pipes for the refrigerant fluid are connected in parallel
with the boiler system using suitable valves to prevent
the refrigerant from entering the boiler.
▶ The pipe system of a boiler connected to the heating
coils of hot-air heating systems that may be exposed
to the circulation of cooled air must be fitted with a
flow-control valve or some other automatic system for
preventing the boiler water from circulating by gravity
during the cooling cycle.
NOTICE: Risk of system damage due to leaking
connections!
▶ Install the connection cables to the boiler in such a
way that they are not under stress.
DANGER: Risk of fire from flammable materials!
▶ Maintain a clearance of 2 inches (51 mm) from pipes
carrying hot water and flammable walls in the
installation room.
We recommend installing a dirt filter and a silt clearance
filter (accessory) in the boiler return connection to
reduce build-up of debris on the water side.
Observe the local regulations for connection of boiler
systems.
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