1
x
General safety precautions
1.2.5 Requirements for the heating water
Damage due to deposits and corrosion: Observe
the current technological regulations to prevent
corrosion products and deposits.
Measures for desalination, softening or
hardness stabilisation are necessary, if the filling
and top-up water have a high total hardness
(>3 mmol/l - total of the calcium and magnesium
concentrations, calculated as calcium car-
bonate.
Minimum requirements regarding the quality
of filling and supplementary water:
– Water hardness (calcium and magnesium,
calculated as calcium carbonate):
≤
3 mmol/l
– Conductivity:
≤
1500 (ideal:
≤
100)
μ
S/cm
– Chloride:
≤
250 mg/l
– Sulphate:
≤
250 mg/l
– pH-values (heating water): 6.5 - 8.5
Measures for desalination, softening or
hardness stabilisation or other suitable condi-
tioning measures are necessary to maintain the
required water quality if the filling and top-up
water have a high total hardness or other prop-
erties divergent from the minimum requirements.
Using filling water and top-up water which does
not meet the stated quality requirements can
cause a considerably reduced service life of the
equipment. The responsibility for this lies solely
with the operator.
1.2.6 Heating system and sanitary
connection
●
Create a heating system according to the
safety requirements of EN 12828.
●
The plumbing connection must comply with
the requirements of EN 12897. The require-
ments of the following must also be observed:
– EN 1717 – Protection against pollution of
potable water installations and general
requirements of devices to prevent pollu-
tion by backflow
– EN 61770 – Electric appliances connected
to the water mains – Avoidance of back-
siphonage and failure of hose-sets
– EN 806 – Specifications for installations
inside buildings conveying water for human
consumption
– and, in addition, the country-specific legis-
lation.
During operation of the ROTEX GCU compact
with additional heat source, the storage tank
temperature may exceed 60 °C, above all when
solar energy is used.
●
It is advisable therefore to install a protection
from scalding (hot water mixer unit such as
VTA32,
15 60 16
) at the time of instal-
lation.
1.2.7 Fuel
The ROTEX GCU compact is factory set to the
gas type indicated on the burner sticker and on
the settings type plate and adjusted to the gas
pressure indicated on the burner sticker.
●
Operate the device only with the gas type and
at the gas pressure specified on these
stickers.
●
Gas installation and adjustment may only be
carried out by gas technicians and in
compliance with valid gas guidelines as well
as the specifications of the responsible gas
supply company.
1.2.8 Operation
●
Do not operate the ROTEX GCU compact if
the protective cover is open.
●
Only operate the ROTEX GCU compact if all
the requirements according to the checklist in
chap. 5.2 are satisfied.
Summary of Contents for GCU compact 315
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