Viessmann Vitotron 100 Series, Инструкция по установке и эксплуатации

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Installation sequence
Using the control panel
(cont.)
– Control unit:
p-constant – constant pressure
p-alternating – alternating pressure.
In the control mode (p-constant), the pressure
differential generated by the pump is maintained
and the output is fixed at a set value up to the
maximum pump rate. This type of control is
recommended for underfloor heating circuits
or older heating systems with larger diameter
pipes, as well as for all applications with fixed
properties. In control mode (p-alternating
– variable mode), the pressure differential
generated by the pump is maintained at a
level that varies linearly between ½ H and H.
The differential pressure setting decreases
or increases depending on the flow rate. This
type of control is used in heating systems
with radiators, as it reduces the flow noise
of thermostatic valves.
– Air vent valve:
Switch on: Start the system venting process
Switch off: Stop the system venting process.
During the venting process (10 min), the pump
operates alternately at maximum and minimum
speed. This will collect the air bubbles, making
it easier to remove them from the system.
– Pump stroke.
■
Maximum boiler output: The set rated output of the
boiler.
■
FN input: Select the system response to a short-
circuited FN input (only type VMN3):
– Switch off: Function deactivated.
– ( ): Frost protection temperature – the short
circuit of the FN input inevitably results in the
frost protection temperature being maintained
regardless of the room temperature set in the
central heating program.
– ( ): Energy saving temperature. The short
circuit of the FN input inevitably results in an
energy saving temperature independent of the
room temperature set in the central heating
program.
– PV (only available in cylinder operation): The
short circuit of the FN input causes the cylinder
to fill outside the schedule with limited rated
output.
■
PW MAX [kW] (only type VMN3): Setting for
maximum buffer charging outside the schedule in
the case of an FN input.
Note: The parameter is available with the setting
"Input FN: PV".
■
Pressure control:
Yes – heating mode starts when the pressure
reaches at least 0.5 bar
No – control switched off. The pressure
control must be switched off when the
boiler is operated in an open vented
system.
■
Operating mode (only type VMN3):
– Basic: The boiler is the only appliance
controlling the heating system. If additional
heating modules are used, they will operate
according to the boiler schedule.
– Source: The boiler only acts as a heat source,
the heating system is controlled by the heating
modules by reporting a heat demand via the
relevant parameters.
– Buffer: The boiler monitors cylinder filling. The
cylinder is drained via the heating modules.
■
Heating circuits (only type VMN3): (If other heating
circuits are installed in the system, select the
relevant heating circuits from the list);
– Maximum flow temperature: Maximum flow
temperature of the heating circuit. For example,
if the maximum temperature is 45 °C, this value
must be set.
– Control unit:
According to curve – the temperature in the
heating circuit is calculated based on the outside
temperature and the set room temperature
according to the schedule. Fixed parameters –
flow temperature of the heating circuit matches
the MAN power supply temperature.
Heating curve no. Heating curve selection
(see chapter Heating curve ). Note: The
parameter appears when the control is set
according to the heating curve.
Heating curve offset – offset of the heating
curve (see chapter Heating curve ). Note: The
parameter appears when setting "According to
curve".
– Automatic pump operation:
Yes – heating circuit operation as required
No – constant heating circuit operation.
The position in the menu can be displayed
by pressing "End" or by pressing and holding
the rotary switch. If no entries are made for
3 minutes, the display returns to the main
function screen.