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INSTALLATIoN
electrical connection
10.4 Filling the system
Material losses
!
Never switch on the power before filling the system.
10.4.1 Heating circuit water quality
The heating system is filled with drinking water. To prevent dam-
age to the heating system, comply with the following limits.
unit
Water hardness
°dH
pH value
Chlorine
mg/l
You can find out the water hardness and the chlorine value in the
fill water from the local water supplier.
f Observe local requirements (e.g. VDI 2035 in Germany).
We do not recommend desalinating the fill water, as this may
cause a negative change in the pH value. If you desalinate the fill
water, check the pH value 8-12 weeks after installation and after
each refill.
f Do not add inhibitors or additives to the filling water.
Accessories for water softening
If you need to soften the fill water, you can use the following
product.
- Heating water softener HZEA
- HZEN replacement cartridge
f Recheck these limits 8-12 weeks after commissioning, every
time the system is topped up and during the annual service.
Appliance in low-occupancy buildings
During regular operation, the connection lines and the system are
protected by the frost protection function of the appliance.
If the appliance is disconnected from the power supply for a longer
period of time (decommissioning, prolonged power failure), drain
the appliance on the water side. Otherwise the appliance is not
protected against frost.
If it is not possible to detect power failures (for example if the
system is in a holiday home left vacant for extended periods of
time), the following protective measure can be taken.
f Add a suitable concentration of ethylene glycol to the fill
water (20-40 % by vol.). Observe the instructions for the
antifreeze. Only use antifreeze products which have been
approved by us.
f Please note that antifreeze changes the density and viscosity
of the fill water.
MEG 10 Heat transfer medium as concentrate
based on ethylene glycol
MEG 30 Heat transfer medium as concentrate
based on ethylene glycol
34
| HSBC 200 L
10.4.2 Filling the heating system
Value
≤ 3
6.5-8.5
< 30
f Fill the heating system via the drain valve.
f Vent the pipework.
10.4.3 DHW cylinder filling
f Filling the DHW cylinder via the "cold water inlet" connection.
f Open all downstream draw-off valves until the appliance is
f Adjust the flow rate. For this, observe the maximum permis-
f Carry out a tightness check.
f Check the safety valve.
11. Electrical connection
Part number
231109
161696
Note
f Fill the heating system only via the lower drain valve
on the buffer cylinder.
full and the pipework is free of air.
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.
WARNING Electrocution
Carry out all electrical connection and installation work
in accordance with relevant regulations.
Before any work on the appliance, disconnect all poles
from the power supply.
WARNING Electrocution
The connection to the power supply must be in the form
of a permanent connection. Ensure the appliance can be
separated from the power supply by an isolator that dis-
connects all poles with at least 3 mm contact separation.
This requirement can be met by using contactors, circuit
breakers, fuses/MCBs, etc.
Material losses
!
Provide separate fuses for the two power circuits of the
appliance and the control unit.
Material losses
!
Observe the type plate. The specified voltage must match
the mains voltage.
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