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6. Clean the cylinder and the silencer
hood
The cylinder and silencer hood are made from
easy to clean plastic. Only clean with a soft
cloth and a mild detergent comprising water
and soap.
Aggressive cleaning agents containing
solvents are unsuitable. These might damage
the plastic surface.
6.2 Temporary shutdown
The GasSolarUnit/GasCompactUnit can be
temporarily shut down, if neither central
heating nor DHW are required. However, we
recommend that the GasSolarUnit/Gas-
CompactUnit is switched into the standby
mode and to simply log off the heating and
DHW demand (see chapter 4, section
operating mode selector).
As long as the system is fill, frost protection
will be assured, subject to the GasSolar-
Unit/GasCompactUnit remaining supplied with
gas and power and the mains isolator stays
ON during the frost period.
Drain the equipment, if the gas and power
supply to the GasSolarUnit/GasCompactUnit
cannot be assured during a frost period. If the
risk of frost prevails only for a few days, when
the gas and power supply cannot be assured,
then the GasSolarUnit/GasCompactUnit may
not need to be drained on account of its
excellent thermal insulation, subject to the
cylinder being regularly checked and its water
temperature does not drop below +3 °C.
However, there will then be no frost protection
for the heat distribution system.
Draining the system
Should it prove necessary to drain the system
completely, drain the heating circuit heat
exchanger, the cylinder and the DHW heat
exchanger.
Draining the cylinder
To drain the cylinder, attach the hose with the
hose connector supplied (in the accessories
pack) to the solar return (pos. 8 in Fig. 2-1-1)
and let the cylinder empty completely.
Note:
Only use the hose connector
supplied, as this automatically
opens the foot valve on
connection. Where a Solaris system is
connected, the system can also be
drained via the boiler fill & drain valve
attached to the Solaris return.
Draining the heating circuit heat
exchanger and the DHW heat exchanger
To drain both heat exchangers, separate the
heating flow and return as well as the cold
water supply and the hot water outlet. Then
connect hoses routed downwards, so that the
hose opening is as close to the floor level as
possible. Drain the heat exchanger according
to the pipette principle.
Remove the two M6 fixing nuts from the
burner flange. The burner can then be lifted
out of the combustion chamber (Fig. 6.1.5).
To clean the combustion chamber, flush it out -
after sealing off the direct condensate drain
hole inside the combustion chamber - from the
top with clean water, until all residues have
been removed from the inside of the
combustion chamber and the ribs of the flue
gas heat exchanger. (A steam cleaner may also
be used to remove harder deposits.)
Check the burner as follows:
• Clean the burner surface
(cloth, plastic brush)
• Visual check of the ignition and ionisation
electrodes (damage, gaps in accordance
with Fig. 5.1.10)
• Fit the burner back into the combustion
chamber
Please note:
When re-installing
the burner, remember to fit the
fixing earth strap underneath
the nut.
• Ensure that the gas supply pipe is sound
and in perfect condition.
• Run the burner for approx. 5 minutes in
emission test mode and then analyse the
combustion with reference to the following
values:
1. Flue gas temperature
at the flue test port (<120 °C).
2. CO
2
content in accordance with
Fig. 5.1.7/5.1.8 ± 0.2 %)
or O
2
content ± 0.1 %
3. CO content (< 50 ppm)
• Correct the burner adjustment in accor-
dance with chapter 5.1, if the flue gas test
results in deviating values.
Note:
We recommend that all actual
values and work carried out are
entered into the maintenance
record supplied (inside back cover),
together with the date and signature and
position this record clearly visible to the
flue gas inspector [where appropriate].
Summary of Contents for GasCompactUnit Series
Page 17: ... 17 Fig 3 4 3 Flue gas system sets ...
Page 55: ... 55 ...
