Technical information

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EC
II
1. Internal termination of condensate drainage pipe to
internal stack
3. External termination of condensate drainage pipe via
inter
nal discharge br
anch (e
.g.
sink w
aste - proprietary fitting).
2. External termination of condensate drainage pipe via
internal discharge branch (e.g. sink waste) and condensate
siphon
frequent filling of the heating system can lead to
p
remature scaling of the main exchanger and failure of
hydraulic components.
DO
MESTIC
WA
TER
:
The domestic water must be in accordance with the
r
elevant recommendation of BS 5546:1990. Copper
t
ubing 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.
WATER TREATMENT
The boiler is equipped with an aluminium alloy 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 aluminium alloy
circuit. These include (Fernox Superfloc, BetzDearborn
Sentinel X300 or X400), 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
temper
ature of the metallic walls and therefore add to
the thermal stress of the heat exchanger.
Demineralised water is more aggressive so in this
situation it is necessary to treat the water with an
appropriate corrosion inhibitor.
- Any treatment of water by additives in the system for
frost protection or for corrosion inhibition has to be
absolutely suitable for all the metals used in the circuit
including the aluminium alloys.
The use of a corrosion inhibitor in the system such as
Fernox MB-1, BetzDeaborn Sentinel X100 or Fernox
System Inhibitor is recommended to prevent corrosion
(sludge) damaging the boiler and systems;
- If anti-freeze substances are to be used in the system,
check carefully that they are compatible with the
aluminium.
In par
ticular, DO NOT USE ordinar
y ETHYLENE
GL
YCOL, since it is corrosiv
e in relation to aluminium
and its allo
y, as well being toxic.
MTS suggests the use of suitab
le anti-freez
e products
such as F
er
no
x ALPHI 11, which will pre
v
ent r
ust and
incrustation taking place.
P
er
iodically check the pH of the water/anti-freeze