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Information
Product description
The Vitotron 100 is a system boiler with an optional
connection to a DHW cylinder.
In the delivered condition, the Vitotron type VLN3 is
set up for operation with a constant boiler water
temperature.
In the delivered condition, the Vitotron 100 type VMN3
is set up for weather-compensated operation. An
outside temperature sensor and a room temperature
sensor are included in the standard delivery.
The appliance is equipped with a sealed unvented
hydraulic system with 2 connections for the heating
flow and return.
DHW heating with a DHW cylinder
A 3-way valve is available for connecting the DHW
cylinder, which must be installed on the outside of the
boiler. The cylinder temperature sensor (accessories)
can be connected to the boiler control unit and
demands heating energy.
Installation information
A moist central heating system must be flushed
■
before the boiler is installed.
Do not install any shut-off fittings (e.g. valves) at the
■
safety valve diffuser.
The boiler must be installed on a flat wall surface.
■
The boiler must not be installed in a humid
■
environment, in a place where there is a risk
of explosion, or in a place where the ambient
temperature may fall below 0 °C.
All installation work must be carried out with the
■
power and water supply switched off.
The boiler is set at the factory for use with a central
■
heating system. To operate the boiler in conjunction
with a DHW cylinder, the standard setting must be
changed in the extended settings.
The electrical installation must include surge
■
protection to protect the sensitive, electronically
controlled heating system from voltage peaks.
Do not drain the water from the central heating
■
system after the heating period.
Leave the controller in standby mode between
■
heating periods and do not interrupt the power
supply.
6
These boilers are only intended for installation in
sealed unvented heating systems. Boilers for open
vented heating systems are also available.
The following components are integrated into the
hydraulic system:
Circulation pump
■
Safety valve
■
Diaphragm expansion vessel (5 litres)
■
The VMN3 boiler is equipped with an expansion vessel
(content: 5 l, pressure: 1.5 bar). The expansion vessel
is sufficient for the following heating system capacities
at the specified heating medium temperatures and the
specified central heating system pressure.
Heating medium
Capacity of
temperature
central heating
(flow and return)
system
[°C]
85/70
70/55
55/45
50/40
45/35
If a higher capacity is required for the moist central
heating system, an additional expansion vessel must
be installed.
Pressure in
central heating
system
[l]
[bar]
56
80
127
1.5
153
188
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