Vaillant auroTHERM VFK 900, Руководство по запуску, обслуживанию и устранению неисправностей

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59 Manual - Solar hot water systems 0020009607_02
• Set the hot water thermostatic mixing valve with the
adjusting knob to maintain your desired temperature
at the hot water taps.
H
Danger!
Risk of being scalded by hot water!
Set the thermostat mixer to below 60 °C and
check the temperature at a hot water tap to
ensure effective protection against scalding.
6.6 Filling the reheating circuit
h
Note!
Do not use the pressure relief valve of the
boiler for bleeding.
´B´ Port ´A´ Port
A B
1
Fig. 6.3 Motorised 2 port valve
• Flush the entire primary central heating system with
cold and hot water. Fill and bleed the central heating
system according to the installation manual of the
boiler.
• Set the lever ( 1 ) on the motorised 2 port valve to
MANUAL and lock it in this position.
• Fill and bleed the central heating system after draining
it completely.
• Unlock the lever on the motorised 2 port valve by
setting it back to AUTO.
2
1
1
2
3
N
L
immer
sion
he
at
er
C°
c
y
linder
co
n
tr
o
l
C°
Fig. 6.4 Setting thermostats
• Set the knob of the hot water thermostat of the solar
cylinder ( 2 , Fig. 6.4) and immersion heater ( 1 , Fig. 6.4)
to the middle position (about 45 °C) for start-up and
to achieve maximum energy efficiency.
• Start up the boiler (refer to Section 6.7) until the solar
cylinder is at operating temperature and all radiators
in the system are warm. Then drain the entire central
heating system again to remove any residue from the
pipes. Fill and bleed it again afterwards as described
above.
6.7 Starting up the boiler
• Switch on the main switch of the boiler.
• Make sure the control device and the thermostats are
set in such a way that heating is necessary.
• Check whether the boiler starts up and the water in
the solar cylinder and radiators is heated up according
to the hot water and room thermostat settings.
• Perform the commissioning and testing procedures in
accordance with the installation manual for the boiler.
• After finished the starting-up set the hot water
temperature at the controller (e. g. solar control
auroMATIC 560) to 45 °C. This will achieve maximum
energy efficiency of the solar system.
If the hot water temperature is controlled via the
build-in cylinder thermostat, set the according knob
(
2 , Fig. 6.4) to 45 °C.
Set the thermostat of the immersion heater
(
1 , Fig. 6.4) to the desired temperature.
Start-up 6