Filling The Central Heating System; Toxic Chemical - Baxi Luna 3 Comfort Notice D'installation Et D'entretien

By-pass could be a 0.86 in / 22 mm pipe controlled by a
valve or an uncontrolled radiator
radiator
valve
lockshield
Vanne
valve
radiateur
note: A drain tap should be installed at the lowest point of the
heating circuit and beneath the appliance.
The system design pressure (cold) should be set to (7.25-14.5) p.s.i. / (0.5-1) bar. This pressure is equivalent to the maxi-
mum static head (see Fig. 17) in bar + 0.3 (14.5 p.s.i. = 1 bar = 10.2 metres of water).
Filling of the system must be carried out in a manner approved by the local Water Undertaking. The system may be filled
as shown in Fig. 18-19.
Drain taps must be used to allow the system to be completely drained.
The heating system should be thoroughly flushed before the boiler is connected and again after the first heating.
310 Fi
Fig. 18
Toxic chemicals, such as used for boiler treatment, shall not be introduced into the potable water used for space hea-
ting.
3.10 - heating system and refrigeration system
The boiler, when used in connection with a refrigeration system, must be installed so the chilled medium is piped in parallel
with the boiler with appropriate valves to prevent the chilled medium from entering the boiler.
The boiler piping system of a hot water boiler connected to heating coils located in air handling units where they may be
exposed to refrigerated air circulation must be equipped with flow control valves or other automatic means to prevent
gravity circulation of the boiler water during the cooling cycle.
InstructIons pertaInInG to tHe Installer
Heating flow
system
drain tap

3.8 - filling the central heating system

boiler filling tap
Manometer
boiler drain point

3.9 - toxic chemical

Make up vessel
Boiler
automatic air vent
Heating
by-pass
(if required)
Heating retum
1.310 Fi
Fig. 19
18
3.8 ft / 1 metre min
static head of system
additional expansion vessel (if
required)
Filling point
DHW outlet
Mains water inlet
Fig. 17
boiler filling tap
95.188.3 - GB