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INSTALLATION
COMMISSIONING
9.7
Heating or solar installation
9.7.1
Water quality, solar circuit
A glycol/water mixture of up to 60 % is permitted for the indirect
coil in the solar circuit if only dezincification-resistant metals,
glycol-resistant gaskets and diaphragm expansion vessels suitable
for glycol are used throughout the installation.
9.7.2
Oxygen diffusion
Material losses
!
Avoid open heating systems and plastic pipes in under-
floor heating systems which are permeable to oxygen.
In underfloor heating systems with plastic pipes that are per-
meable to oxygen and in open vented heating systems, oxygen
diffusion may lead to corrosion on the steel components of the
heating system (e.g. on the indirect coil of the DHW cylinder, on
buffer cylinders, steel heating elements or steel pipes).
Material losses
!
The products of corrosion (e.g. rusty sludge) can settle in
the heating system components and can result in a lower
output or fault shutdowns due to reduced cross-sections.
Material losses
!
Avoid open vented solar thermal systems and plastic
pipes which are permeable to oxygen.
With plastic pipes that are permeable to oxygen, oxygen diffusion
may lead to corrosion on the steel components of the solar thermal
system (e.g. on the indirect coil of the DHW cylinder).
10. Commissioning
10.1 Commissioning
f Open a draw-off point until the appliance has filled up and
f
the pipework is free of air.
f Adjust the flow rate. For this, observe the maximum permis-
f
sible flow rate with a fully opened tap (see chapter "Specifi-
cation / Data table"). If necessary reduce the flow rate at the
butterfly valve of the safety assembly.
f Carry out a tightness check.
f
f Switch the mains power ON if required.
f
f Check the function of the fitted accessories.
f
f Check the function of the safety assembly.
f
SBB 751 SOL | SBB 1001 SOL
f Thoroughly flush the indirect coil with water before connect-
f
ing the solar thermal system.
10.1.1 Appliance handover
f Explain the appliance function to users and familiarise them
f
with its operation.
f Make users aware of potential dangers, especially the risk of
f
scalding.
f Hand over these instructions.
f
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10.2 Recommissioning
See chapter "Commissioning".
11. Shutting down
f Drain the appliance. See chapter "Maintenance / Draining the
f
appliance".
12. Troubleshooting
fault
Cause
The safety valve drips
The valve seat is con-
when the heating is
taminated.
switched off.
13. Maintenance
WARNING Electrocution
Carry out all electrical connection and installation work
in accordance with relevant regulations.
WARNING Electrocution
Before any work on the appliance, disconnect all poles
of the appliance from the power supply.
If you need to drain the appliance, observe chapter "Draining the
appliance".
13.1 Checking the safety valve
f Regularly vent the safety valve on the safety assembly until a
f
full water jet is discharged.
13.2 Draining the appliance
WARNING Burns
Hot water may escape during the draining process.
If the appliance needs to be drained for maintenance or to protect
the whole installation when there is a risk of frost, proceed as
follows:
f Close the shut-off valve in the cold water inlet pipe.
f
f Open the hot water taps on all draw-off points.
f
f Drain the appliance via the charging station return (see chap-
f
ter "Specification / Dimensions and connections"). Please
note that residual water remains in the appliance.
13.3 Replacing the signal anode
f Replace the signal anode if it becomes depleted. Observe
f
the maximum permissible transition resistance between the
anode and the cylinder 0.3 Ω.
SBB 751-1001 | SBB 751-1001 SOL |
Remedy
Clean the valve seat.
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