Ariston microGENUS HE 24 MFFI, Инструкции по установке и обслуживанию

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9
S
AFETY
V
ALVE
D
ISCHARGE
:
The discharge should terminate facing downward on the
exterior of the building in a position where discharging
(possibly boiling water & steam) will not create danger or
nuisance, but in an easily visible position, and not cause
damage to electrical components and wiring.
The discharge must not be over an entrance or a window
or any other type of public access.
A
IR
R
ELEASE
P
OINTS
:
These must be fitted at all high points where air naturally
collects and must be sited to facilitate complete filling of
the system.
The appliance has an integral sealed expansion vessel to
accommodate the increase of water volume when the
system is heated.
It can accept up to 6 litres (1.3 gal) of expansion water. If
the heating circuit has an unusually high water content,
calculate the total expansion and add an additional
sealed expansion vessel with adequate capacity. This
should be located on the return pipe work as close as
possible to the pump inlet.
M
AINS
W
ATER
F
EED
- C
ENTRAL
H
EATING
:
A method for initially filling the heating system is supplied
with the connection kit. The filling loop is connected
between the cold water inlet and the central heating flow
connections, and incorporates a non-return valve. To
operate the filling loop, it is necessary to open both
quarter turn handles, once the required pressure has
been achieved, close both handles and disconnect the
hose in accordance with water byelaws. N
OTE
: The
installer should ensure that there are no leaks as frequent
filling of the heating system can lead to premature scaling
of the main exchanger and failure of hydraulic
components.
VR003A
R
ESIDUAL
H
EAD OF THE
B
OILER
D
T 20°C
D
OMESTIC
W
ATER
:
The domestic water must be in accordance with the
relevant recommendation of BS 5546:1990. Copper
tubing to BS EN 1057:1996 is recommended for water
carrying pipe work and must be used for pipe work
carrying drinking water, a scale reducer should also be
used to reduce the risk of scale forming in the domestic
side of the heat exchanger.
W
ATER
T
REATMENT
The boiler is equipped with a secondary heat exchanger
(recuperator) made from stainless steel as well as the
copper main heat exchanger.
The detailed recommendations for water treatment are
given in BS 7593:1992 (Treatment of water in domestic
hot water central heating systems); the following notes
are given for general guidance;
- If the boiler is installed on an existing system, any
unsuitable additives must be removed;
- Under no circumstances should the boiler be fired
before the system has been thoroughly flushed; the
flushing procedure must be in line with BS7593:1992.
We highly recommend the use of a flushing detergent
appropriate for the metals used in the circuit. These
include cleansers produced by Fer nox and
BetzDearborn, whose function is to dissolve any
foreign matter that may be in the system;
In hard water areas or where large quantities of water
are in the system the treatment of the water to prevent
premature scaling of the main heat exchanger is
necessary.
The formation of scale strongly compromises the
efficiency of the thermic exchange because small
areas of scale cause a high increase of the
temperature of the metallic walls and therefore add to
the thermal stress of the heat exchanger.
Demineralised water is more aggressive so in this
F
IG
. 2.7