Vaillant VRC 630, Руководство по эксплуатации

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Installation Instructions VRC 630 0020095108_00
Operating the controller 7
7.4.3 Menu A5: Setting priority and cascade
parameters
In Menu A5 you determine whether hot water genera-
tion or heating has priority.
Installation Assistant A5
System configuration
Preference
No
>Select
Settable
parameters
Description
Setting
range Factory
setting
Preference Preference works like an isolating circuit for an individual boiler.
The cylinder is directly connected hydraulically to the boiler.
In the case of an individual boiler, the cylinder can also be directly
connected hydraulically to the boiler. Cylinder charging has priority
over heating; the requirements of the heating circuits cannot be
covered at this time. During cylinder charging, the internal 3-way
valve or the charging pump in the boiler is activated. This parameter
only appears if no cascade has been detected.
Yes/No No
Stop valve A low-loss header is not needed for boilers with a large water capa-
city. In cascades, the boilers that are not active are isolated from
the active boilers by means of a stop valve. The valve is connected
to the boiler pump in the boiler electronics. The valve in the lead
boiler will always be activated in this case, as otherwise the heat
consumer pumps will be working against the pumps. Yes/No No
Isolation switch Is set to YES if in a cascade the cylinder is directly connected
hydraulically to the last boiler in the cascade and not to the collec-
tor downstream of the low-loss header. The unit is then "isolated"
from the cascade during cylinder charging and charges the cylinder,
while the remaining units in the cascade can continue to service the
heating circuits. During cylinder charging, the internal 3-way valve
or the charging pump in the boiler is activated. This parameter only
appears with a cascade.
Yes/No No
Reverse boiler
sequence When several boilers of the same type are cascaded, the operating
times of the units should be evenly distributed by means of this
function. The controller sums the time for which it has activated
each boiler (the activation hours). Daily at midnight the controller
checks whether the difference in activation hours > 100 and re-sorts
the boilers if this is the case. ON/OFF Off
Table 7.23 Settable parameters in Menu A5
Set the parameters according to the heating installa-
tion.
>
With cascades the display shows the following parame-
ters:
Installation Assistant A5
System configuration
Stop valve
No
Isolation switch No
Reverse boiler sequence Off
>Select