9 Inspection and maintenance
36
Installation and maintenance instructions auroTHERM exclusive 0020077989_04
1.
Temporarily decommission (
→
Page 37) the solar sys-
tem.
2.
Replace the leaking collectors.
3.
Start up the solar system again as described in the op-
erating instructions for the system.
8.1.3
Sealing leaking connections
Danger!
Risk of burns and scalding!
In the event of solar radiation inside the units,
collectors can reach 300 °C.
▶
Avoid working in direct sunlight.
▶
Cover the collectors before starting work.
▶
You should preferably perform the work in
the morning.
▶
Wear suitable safety gloves.
1.
Temporarily decommission (
→
Page 37) the solar sys-
tem.
Caution.
Leak caused by incorrect accessories.
Incorrect accessories may result in a leak in
the solar circuit and cause material damage.
▶
Only work in the solar circuit with hard
soldered connections, flat seals, compres-
sion fittings or press fittings which have
been approved by the manufacturer for
use in solar circuits and at correspond-
ingly high temperatures.
2.
Seal any leaking connections.
3.
Start up the solar system again as described in the op-
erating instructions for the system.
8.1.4
Replacing defective pipe insulation
1.
Temporarily decommission (
→
Page 37) the solar sys-
tem.
2.
In order to prevent heat losses, replace any defective
pipe insulation.
3.
Start up the solar system again as described in the op-
erating instructions for the system.
8.1.5
Replacing defective tubes
Danger!
Risk of injury caused by damaged vacuum
tubes and sharp-edged components.
Shards and sharp-edged components may
lead to cuts.
▶
Wear suitable safety gloves.
Danger!
Risk of burns from hot components!
The U tube, heat conducting plate and the
interior of the vacuum tubes become warm
as a result of solar radiation and may cause
scalding.
▶
Wear suitable safety gloves.
▶
Wear suitable protective goggles.
1.
Only use the Vaillant Original replacement tubes.
Note
If a tube has been damaged by a hailstorm,
for example, the individual pipe can be re-
placed.
The solar system can remain in operation
when replacing the tube.
2.
Replace the defective tube as described in the set-up
instructions for the replacement tube.
9
Inspection and maintenance
You can find an overview of the required inspection and
maintenance work in the appendix.
9.1
Checking the product for damage, dirt and
leaks
1.
Check the collectors for dirt.
2.
Check the collectors for damage.
3.
Check the connections for leaks.
9.2
Check solar fluid
1.
Check the pH value of the solar fluid.
Condition
: pH value < 8
▶
Replace the solar fluid.
9.3
Cleaning collectors
Danger!
Risk of burns and scalding!
In the event of solar radiation inside the units,
collectors can reach 200 °C.
▶
Avoid working in direct sunlight.
▶
You should preferably perform the work in
the morning.
▶
Wear suitable safety gloves.
▶
Wear suitable protective goggles.
Caution.
Material damage due to high-pressure
cleaner.
High-pressure cleaners may damage the
collectors due to the extremely high pressure.
