VITOGAS 100
Low-temperature gas-fired boiler
72 to 144 kW
as multi-boiler systems up to 432 kW
File in:
Vitotec technical guide folder, register 2
Technical guide
Design and operation
5822 239-1 GB
2/2002
Contents
Contents
1
Specification
Page
1.1 Product information and operating conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.2 Boiler control units and control panels
H For the operation of single boiler systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
H For the operation of multiple boiler systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4
4
2
Design and operation
2.1
2.2
2.3
2.4
2.5
2.6
2.7
2.8
5
7
8
10
11
12
12
13
3
Application examples
3.1 Application examples . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
H Application example 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Single boiler system with Vitogas 100 boiler and one heating circuit with mixer
for heating circuit control and DHW heating
H Application example 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Single boiler system with Vitogas 100 boiler and one heating circuit with mixer
and system separation
H Application example 3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Single boiler system with Vitogas 100 boiler and one heating circuit with mixer,
distribution pump and low-pressure distributor
H Application example 4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Single boiler system with Vitogas 100 boiler and two heating circuits with mixer,
distribution pump and low-pressure distributor
H Application example 5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Single boiler system with Vitogas 100 boiler and one heating circuit with mixer
and shunt pump for raising the return temperature
H Application example 6 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Single boiler system with Vitogas 100 boiler and two heating circuits with mixer
and shunt pump for raising the return temperature
H Application example 7 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Single boiler system with Vitogas 100 boiler and two heating circuits with mixer,
shunt pump and 3-way mixer for raising the return temperature
H Application example 8 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Multi-boiler system with Vitogas 100 boilers and shunt pumps
for raising the return temperature of each boiler
H Application example 9 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Multi-boiler system with Vitogas 100 boilers with distribution pump and
low-pressure distributor
H Application example 10 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Multi-boiler system with Vitogas 100 boilers with distribution pump and
injection control
H Application example 11 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Multi-boiler system with Vitogas 100 boilers with 3-way mixing valve
for raising the return temperature
H Application example 12 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Multi-boiler system with Vitogas 100 boilers with low loss header
and 3-way mixing valve for raising the return temperature
3.2 Domestic hot water heating with cylinder loading system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
3.3 Installation notes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
3.4 On-site control equipment via LON BUS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
4
Appendix
4.1 Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
5822 239 GB
Design in general . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Water connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Safety equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Flue gas connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Flue gas . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Gas connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Electrical connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Standard values for water quality . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3
2
1.1 Product information and operating conditions
1.1 Product information and operating conditions
Vitogas 100 (type GS1)
Low-temperature gas-fired boiler
Rated output 72 to 144 kW, as multi-boiler
system up to 432 kW
Available as block or in single sections
For operation with modulating boiler
water temperature
With two-stage pre-mix burner for natural
gas and LPG
H High operational safety and long
service life because of heating surfaces
made from special cast iron with
lamellar graphite and low stresses on
the heating surface.
H Economical energy consumption
through modulating boiler water
temperature.
Standard efficiency: up to 93 %.
H Highly reliable and gentle, low-noise
ignition through intermittent ignition
system.
Fully automatic
Permissible flow temperature
(= safety temperature) up to 110 ºC
Maximum operating pressure 6 bar
H Matching flue gas header made from
stainless steel for cascade operation
with up to three Vitogas 100 boilers.
– Flexible boiler location.
– Variable flue gas collector installation
– Sliding adapter for simple offset
compensation
– Excellent flow characteristics on the
flue gas side because of continuous,
circular cross-section.
H Weather-compensated digital cascade
control unit Vitotronic 333, capable of
communicating:
– three boilers can be joined with
Vitotronic 100.
– up to 32 Vitotronic 050 control units
can be connected.
– integration into building management
systems via LON BUS.
Product ID
CE-0085 AS 0297
Operating conditions
Requirements
Fulfilled by
1. Heating water flow rate
None
––
2. Boiler return temperature
(minimum value)
35 ºC
Installation of an effective return
temperature raising facility*1
3. Lower boiler water temperature
45 ºC
The Viessmann control unit, which
is part of the standard delivery
4. Two stage burner operation
1st stage 65 % of rated output
Burner adjusted in the factory
5. Reduced operation
Single boiler systems and lead boiler of multi-boiler
systems
– operation with the lower boiler water temperature
The Viessmann control unit, which
is part of the standard delivery
Lag boiler of multi-boiler systems
– are switched off
5822 239 GB
6. Weekend reduction
*1As
As per reduced operation
As per reduced operation
per application examples from page 14.
" Please note:
For water quality requirements, see page 13.
3
1.2 Boiler control units
1.2 Boiler control units and control panels
(for a comprehensive description, see data sheets boiler control units)
The following control units are available
for Vitogas 100 boilers:
For the operation of single boiler systems
Vitotronic 100 (type KC2)
H electronic boiler control unit for
constant boiler water temperature
or
weather-compensated operation, in
conjunction with an external control
unit
H for two-stage burners
H with DHW cylinder temperature control
(According to the Heating System Orders,
a weather-compensated or room
temperature-dependent control unit with
timer programming must be installed for
reduced operation.)
Vitotronic 200 (type KW2)
H weather-compensated, digital boiler
control unit
H for single boiler systems
H for two-stage burners
H incl. digital timer with daily and weekly
programs
H with plain text guided programming
unit
H with separately adjustable periods
H with DHW cylinder temperature control
H with integrated diagnostic system.
External commands:
H 1st burner stage ON
H 1st and 2nd burner stage ON
A volt-free contact must be provided for
each command.
The volt-free contacts are connected to
plug connector aBÖ and to the cable for
the 2nd burner stage at plug
connector lÖ.
Vitotronic 300 (type GW2)
H weather-compensated, digital boiler
control unit
H for single boiler systems
H for max. 2 heating circuits with mixer
H for two-stage burners
H with plain text guided programming
unit
H with separately adjustable periods and
heating curves
H with DHW cylinder temperature control
H incl. control unit for cylinder loading
systems with regulated 3-way valve
or
as alternative to regulating a constant
return temperature with regulated
3-way valve
H with integrated diagnostic system and
additional functions.
An extension kit is required for each
heating circuit with mixer. The LON
communication module is required for
LON BUS communication.
For the operation of multi-boiler systems
Every boiler in a multi-boiler system is
equipped with Vitotronic 100 (type GC1).
Vitotronic 333 (type MW1) is part of the
standard delivery (see price list) and must
be installed separately.
The LON communication module must be
fitted into Vitotronic 100, see price list.
In multi-boiler systems with external
control unit, the load-dependent burner
and boiler control as well as the DHW
cylinder temperature control must be
implemented by the overriding (external)
control unit.
(On request)
Control panels
Vitocontrol control panels with
weather-compensated control unit
Vitotronic 333 (type MW1S) for 1 to 3
boilers and 2 heating circuits with mixers
and additional Vitotronic 050, types HK1S
or HK3S for 1 or up to 3 heating circuits
with mixers can be supplied for all
Vitogas 100.
4
External commands in conjunction with
Vitotronic 100 (type KC2) and external
weather-compensated control unit with
DHW cylinder temperature control:
H enable boiler
H 1st burner stage ON
H 1st and 2nd burner stage ON
A volt-free contact must be provided for
each command.
The volt-free contacts are connected to
plug connector aBÖ and to the cable for
the 2nd burner stage at plug
connector lÖ.
Vitotronic 100 (type GC1)
H Electronic boiler control unit
H for two-stage burners
H ability to communicate via LON BUS.
Vitotronic 333 (type MW1)
H Weather-compensated cascade control
unit for multi-boiler systems with up to
3 boilers with Vitotronic 100.
(Type GC1)
H for max. 2 heating circuits with mixer
H with plain text guided programming
unit
H with DHW cylinder temperature control
H incl. control unit for cylinder loading
systems with regulated 3-way valve
H with sequential boiler strategy
H ability to communicate via LON BUS.
H with integrated diagnostic system and
additional functions.
5822 239 GB
Multi-boiler systems are delivered
complete, comprising:
H 2 or 3 Vitogas 100
H 2 or 3 Vitotronic 100 (type GC1)
H 2 or 3 communication modules LON
H 1 Vitotronic 333 (type MW1)
1.2 Boiler control units
2.1 General design notes
Control equipment for multi-boiler systems
ATS
VTS
Vitotronic 333
VTS
(type MW1)
or
control panel
Vitocontrol
with Vitotronic 333
(type MW1S)
up to 3 boilers with Vitotronic 100 (type GC1)
Switching points
110
DE
A
100
B
90
Flow temperature in °C
80
75
70
G
F
60
50
A Setting options for the high limit
safety cut-out of the Vitotronic boiler
control unit (change the high limit
safety cut-out setting to 110 ºC)
B Setting options for the control
thermostat of the Vitotronic boiler
control unit
C Lower boiler water temperature
(45 ºC)
D Burner ON
E Burner OFF
F Set heating curve
G Set max. boiler water temperature
40
30
C
20
10
+20
+15
+10
+5
Outside temperature in °C
0
-5
-10
-15
-20
2.1 General design notes
Delivery, handling and installation
5822 239 GB
Delivery
We deliver the equipment to site by a
vehicle with a crane facility and will
unload the equipment without special
requirements.
Handling and installation
If Vitogas 100 is delivered as block
assembly, a number of lifting eyes will be
provided, where lifting gear may be
attached. Handling presents no special
difficulties if Vitogas 100 is delivered in
individual sections.
The boilers may be placed onto a level
concrete floor without special
foundations.
For recommended minimum distances
from walls for installation and
maintenance work, see Vitogas 100
datasheet.
However, to facilitate the cleaning of the
boiler room, it is appropriate to position
the boiler on a plinth.
Upon request, a Viessmann installation
engineer may assist in the assembly
(chargeable). For this purpose, the
sections must be located in the
installation area.
5
2.1 Design in general
Location
General requirements
The boiler location should meet the
Combustion Regulation standards set by
the respective country.
In rooms where air contamination
through halogenated hydrocarbons may
occur, such as in hairdressing salons,
printing shops, chemical cleaners and
laboratories, boilers may only be installed
if adequate measures can be taken to
provide uncontaminated combustion air.
If in doubt, please contact us.
Boilers should not be installed in areas
subject to dusty or very humid
conditions.
The boiler location should be kept free
from frost and should be adequately
ventilated.
If these instructions are not observed, any
consequential losses directly related to
any of these causes are excluded from
our warranty.
Requirements of the sample Combustion
Regulation
Requirements laid down for boiler rooms
are listed in the ”Sample Combustion
Regulation”. The respective State
Building Regulations and Combustion
Regulations of the individual Federal
States apply, which are essentially based
on the following requirements of the
sample Combustion Regulation.
.
2
A = 150 cm2 + 2 c m x (ΣQN - 50 kW)
kW
.
ΣQN = Total of all rated outputs in kW
Combustion air openings and pipes
should not be closed or blocked if the
safety equipment installed cannot
adequately ensure that the combustion
equipment can only be operated when
the aperture is free. The required
cross-section should not be reduced by a
closure or grille.
An adequate combustion air supply can
also be verified by other means.
Locations for combustion equipment
Combustion equipment for liquid or
gaseous fuels with a rated output higher
than 50 kW should only be installed in
areas
H which are not used for other purposes,
except the installation of heat pumps,
CHP stations or permanently installed
combustion engines as well as the
storage of fuels
H which do not have openings leading to
other rooms - except door openings,
H whose doors are tight and self-closing,
and
H which can be ventilated.
The burner and control unit of
Vitogas 100 should be able to be switched
off at any time by an emergency stop
switch installed outside the installation
room. Next to the emergency stop switch,
a sign should be positioned with the
inscription ”EMERGENCY STOP SWITCH
– COMBUSTION”.
Further requirements regarding the
installation of combustion equipment
Fuel lines should be equipped with a
device upstream of the gas-fired
combustion equipment installed in the
boiler room, which
H is able to automatically shut-off the fuel
supply in case of an external thermal
load in excess of 100 ºC being exerted,
and
H should be designed so that not more
than 30 l/h – measured as air flow rate –
can flow through or out of the fuel line,
at a temperature of up to 650 ºC and
over a period of at least 30 minutes.
Combustion equipment should be
installed far enough away from
combustible materials and in-built
furniture or be shielded from such
material/furniture, that at the rated output
of the combustion equipment, no
temperatures higher than 85 ºC can occur.
Otherwise, maintain a distance of at least
40 cm.
5822 239 GB
Combustion air supply
For open flue combustion equipment with
a total rated output higher than 50 kW,
the fresh air supply is deemed to have
been verified if the combustion
equipment is located in areas which
provide an aperture or pipe leading
outdoors. The cross-section of the
aperture should be at least 150 cm2 and
should be 2 cm2 larger for each additional
kW rated output above 50 kW. Pipes
should be sized to provide equivalent
flow rates. The required cross-section
may be split to a maximum of 2 apertures
or pipes.
A
As an alternative to these regulations for
installation areas, combustion equipment
may also be installed in other areas, if
H the utilisation of these rooms makes
this necessary and the combustion
equipment can be safely operated, or
H if these rooms are located in a
stand-alone building, whose only
function is the operation of the
combustion equipment and as fuel
storage area.
6
2.1 Design in general
2.2 Water connection
System design
Flow temperatures
To keep distribution losses to a minimum,
we recommend that the
H heat distribution system and the
H domestic hot water heating
are designed for a max. of 70 ºC (flow
temperature).
For boilers supplied with a boiler control
unit, limit the max. boiler water
temperature to 87/95 ºC. Changing the
control thermostat can increase the flow
temperature.
Selection of the rated output
Select boilers acc. to the required heat
demand.
The level of efficiency of low-temperature
and condensing boilers is consistent
across a wide range of boiler loads.
Therefore, the rated output for
low-temperature boilers, condensing
boilers and multi-boiler systems may be
higher than the calculated heat demand
of the building in question.
Safety temperature
Viessmann boilers correspond to EN 303
and DIN 4702 and all are type-tested.
They are suitable for installation in sealed
heating systems acc. to DIN 4751.
Standard efficiency
The standard efficiency for Vitogas 100 is
93 % – at a heating system temperature of
75/60 ºC.
The standard efficiency acc. to DIN 4702-8
is the decisive measure to identify the
energy utilisation of a boiler. It includes
all boiler losses (flue gas, radiation and
standby losses) which are predominantly
influenced by the boiler water
temperature and the boiler load.
The values calculated acc. to DIN 4702-8
correspond to the typical use of a heating
system during the course of a year.
Operating mode
Vitogas 100 is operated with modulating
boiler water temperature (lower boiler
water temperature 40 ºC). We generally
recommend you install a mixer because
of the lower boiler water temperature of
40 ºC.
2.2 Water connection
Heating connections
Existing systems
Flush the heating system thoroughly to
remove dirt and sludge deposits, before
connecting the boiler to an existing
heating system.
Otherwise these dirt and sludge deposits
will settle in the boiler, and can lead to
local overheating, noise and corrosion.
Our warranty excludes boiler damage
caused by such deposits. Where
necessary, install dirt traps.
Primary connections
Connect all heat consumers or heating
circuits to the boiler flow and return
connectors. Do not connect to drains or
other connections.
We recommend you install shut-off
valves into the heating flow and return
pipes, so that the entire water contents
are not drained when work is required on
the boiler or heating circuits.
Heating circuits
For underfloor heating, we recommend
the use of impermeable pipes to prevent
the infusion of oxygen through the pipe
walls. Provide system segregation in
underfloor heating systems for plastic
pipes acc. to DIN 4726 which are not
impermeable to oxygen.
Plastic radiator pipes
We also recommend the installation of a
temperature limiter to limit the maximum
temperature for plastic heating pipework
in heating circuits with radiators.
We supply separate heat exchangers for
this purpose.
Underfloor heating systems and heating
circuits with a large water content should
also be connected via mixers.
Low-temperature and ultra-lowtemperature boilers should be controlled
by separate control units, e.g.
Vitotronic 050.
Heating circuit pumps
Heating circuit pumps in heating systems
with rated output > 50 kW should be
equipped and designed in a way that
matches the electrical power
consumption to the operational
throughput requirements in at least three
stages, if no safety concerns relating to
the boiler make alternative demands.
Application examples
These application examples are merely
recommendations, and should therefore
be checked to ensure that they are
complete and fully functioning on site.
Connect three-phase consumers via
additional contactors.
5822 239 GB
" See chapter 3.1
7
2.3 Safety equipment
2.3 Safety equipment acc. to DIN 4751-2
DIN 4751-2 applies to the design,
installation and operation of sealed and
thermostatically protected heat generator
systems for hot water with permissible
flow temperatures of up to 100 ºC in
water-filled heating systems.
Safety equipment acc. to DIN 4751-2
This standard contains safety
requirements laid down for heat
generators and heat generator systems.
Required safety equipment
ADG
AV1
AV2
1
E
EST
MA
SDB1
SDB2
SIV
SL
STB
TH
TR
WB
Sealed expansion vessel
Shut-off valve
Shut-off valve (protected against
unintentional closing, e.g. cap valve)
Drain
Flash trap
Pressure gauge assembly
Safety pressure limiter max.
Safety pressure limiter min.
Safety valve
Safety expansion pipe
High limit safety cut-out
Thermometer
Control thermostat
Water level limiter
Further legends
2
HK
HKP
HR
HV
Heating circuit
Heating circuit pump
Heating water return
Heating water flow
1 Delivered with Viessmann maximum pressure limiting assembly
2 Delivered with Viessmann minimum pressure limiting assembly
Low water indicator
Acc. to DIN 4751-2, a special low water
indicator can be omitted for boilers up to
350 kW, as long as heating can be reliably
stopped when the water level is too low.
Viessmann Vitogas 100 boilers are
equipped with a low water indicator
(boil-dry protection). Tests have verified
that the burner will be automatically
switched off in case of water shortage,
due to a leak in the heating system,
before the boiler or flue gas systems
reach unacceptably high temperatures.
Maximum pressure limiter
Required for each boiler in systems with
a
H rated boiler output
> 350 kW or a
H safety pressure > 3 bar.
8
Minimum pressure limiter
Required in accordance with DIN 4751-2
in case of safety temperatures > 100 ºC
(install into the expansion pipe). In
multi-boiler systems, one minimum
pressure limiter per system is required.
Flash trap
For boilers above 350 kW, install a flash
trap with blow-off and drain line adjacent
to the safety valve. The blow-off line
should lead outdoors. Any expelled
steam should not endanger anyone.
Safety valve
Equip the boilers acc. to DIN 4751-2 with
a type-tested safety valve
H for hot water heating systems up to
100 ºC flow temperature and
H for hot water heating systems up to
120 ºC flow temperature as well
as according to their type approval.
Identify this valve in accordance with TRD
721, i.e. with
H ”H” up to 3.0 bar permissible operating
pressure and max. 2700 kW rated
output, and with
H ”D/G/H” for all other operating
conditions.
The pipework between the boiler and the
safety valve should not be able to be shut
off. Pumps, fittings or restrictions in this
pipework should be avoided.
The blow-off line from the safety valve
should be designed and constructed so
as to prevent the possibility of increases
in pressure.
Arrange the outlet of the blow-off line so
that any water expelled from the safety
valve can be safely observed and drained
off.
Flash trap and blow-off line can only be
omitted, if
H the high limit safety cut-out is set to
100 ºC, and
H a second high limit safety cut-out and a
second maximum pressure limiter are
installed.
5822 239 GB
General notes
2.3 Safety equipment
Safety equipment selection table
This table indicates the safety equipment required for each system acc. to DIN 4751-2.
(X = required, – = not required)
≦ 350 kW
Rated boiler output
Safety temperature
(STB setting*1, STB part of the standard
delivery of the boiler control unit)
and
operating pressure
(safety pressure)
> 350 kW
100 ºC
110 or 120 ºC
100 ºC
110 or 120 ºC
≦ 30bar
> 30bar
≦ 30bar
> 30bar
Control thermostat
Standard delivery of the boiler control unit
X
X
X
X
X
X
Boiler thermometer
Standard delivery of the boiler control unit
X
X
X
X
X
X
Pressure gauge assembly
Pressure gauge (as separate accessory)
or
as part of the maximum pressure
limiting assembly or the safety
equipment block
X
X
X
X
X
X
Safety valve
A3b
bar safety
f t valve
l iis partt off the
th
safety equipment block
X
X
X
X
X
X
Water level limiter
A low
As
l
water
t iindicator
di t for
f vertical
ti l
installation into the boiler
–
–
–
–
–
X
Max. pressure limiting assembly
Incl. pressure gauge, protected shut-off
valve, drain and additional connector for
an additional high limit safety cut-out
–
X
–
X
X
X
Min. pressure limiting assembly
With protected
t t d shut-off
h t ff valve
l and
d
drain
–
–
X
X
–
X
Flash trap
p
–
–
–
–
X*2
X
on site
unlimited
on site
on site
High limit safety cut-out*2
(additional)
–
–
–
–
X*2
–
Safety pressure limiter*2
(additional)
(Maximum pressure limiter)
–
–
–
–
X*2
–
its delivered state, the high limit safety cut-out (STB) for Vitotronic is set to 120 ºC and should be adjusted for lower safety
temperatures.
*2 According to DIN 4751-2, the flash trap may be omitted, if the high limit safety cut-out of the boiler control unit has been set to
100 ºC and an additional high limit safety cut-out and safety pressure limiter (maximum pressure limiter) are installed.
5822 239 GB
*1 In
9
2.4 Flue gas connection
2.4 Flue gas connection
Flue gas connection
CE certified flue gas collectors are located
on the flue side of boilers. Each boiler is
equipped with its own draught hood. For
multi-boiler systems, the flue gas
collector is part of the standard delivery,
see price list for details.
Implement the ventilation and extraction
system for boiler rooms in accordance
with the Combustion Regulation of the
individual state as well as TRGI ’86/96 or
TRF 1996.
The connection pieces from the flue gas
collector to the chimney stack should be
installed with a gradient of at least
30 mm/m.
Flue gas system design
.
x 1.5 m
if x 1.5 m
then a 1.0 m
Because of the low flue gas temperatures
we recommend that the flue gas collector
and the connection piece are covered
with a refractory thermal insulation to
counteract the formation of condensate in
the flue gas system.
Only install components, which are an
approved part of the flue pipe in
accordance with current Building
Regulations.
5822 239 GB
In multi-boiler systems with two or three
Vitogas 100 boilers, the flue gas
temperatures and minimum
temperatures listed in the Technical
Datasheet of the boiler under
”Specification”, i.e. 80 ºC acc. to DIN
4702-3, cannot be maintained.
During operation with part loads, the flue
gas temperature may fall below 80 ºC.
The selected flue gas system design
should take this fact into account (e.g.
moisture-resistant flue gas system). We
recommend the installation of motorised
flue gas dampers.
a 1.0 m
Installation requirements
0.4 m
Multi-boiler systems
H Outlets from chimneys or flue pipes
should be
– at least 40 cm higher than the roof
ridge or be at least 1m from the roof
surface,
– at least 1 m higher than roof mounted
structures and openings to rooms, if
their distance to chimneys and flue
pipes is less than 1.5 m,
– at least 1 m higher than open
structural parts made from
combustible material, except roof
coverings or be at least 1.5 m away
from them.
– Further deviating requirements may
apply if there is danger or
unacceptable nuisance should be
expected.
1.0 m
Requirements for flue gas systems are
contained in the sample Combustion
Regulation dated September 1997, which
forms the basis of the Combustion
Regulations of each Federal State.
Accordingly, the following are required:
H Flue gas systems should be sized for
clearance diameter and height and,
where necessary, also according to the
heat throughput resistance and the
internal surfaces, so that the flue gases
will be expelled to the outside under all
operating conditions and so that no
dangerous pressures can be created in
any rooms.
H Flue gases from combustion equipment
fired by liquid or gaseous fuels must be
able to be piped into chimney stacks or
into flue pipes.
H Flue pipes mounted on the side of
buildings should be at least 20 cm away
from windows.
1.0 m
The following requirements regarding
design and installation apply to flue gas
systems for gas-fired combustion
equipment:
Prior to work on the flue gas system, the
heating contractor should confer with
the responsible district chimney sweep
(where applicable).
It is advisable to record the district
chimney sweep’s visits.
Standard forms are available from the
regional building inspectorate (where
appropriate).
Gas-fired combustion equipment should
be connected to the chimney stack on the
floor where they are installed (no
transition through separating ceilings).
10
2.5 Flue gas re-circulation
2.5 Flue gas re-circulation
Sizing the flue gas system
Calculating the cross-sections of the flue
gas system is the basis of and a
pre-requisite for the proper function of
any flue gas system.
You can determine the cross-section of
the flue gas system depending on the
rated output and the effective height of
the flue gas systems using the following
cross-section diagram.
DIN 4705 was taken into consideration in
calculating the cross-section diagram.
These calculations are based on the
following parameters:
H Flue gas temperature downstream of
the draught hood approx. 120 ºC and
ambient temperature + 15 ºC. Higher
flue gas temperatures generally only
improve the draught a little.
H The effective flue gas system height
equals the height difference between
the boiler flue connection and the flue
gas outlet.
H Length of the connection piece max. ¼
of the effective flue gas system height,
but not more than 7 m.
The connection adapter and flue gas
system should have the same
cross-section.
H Drag coefficient Σζ for reversing, inlet,
shape and velocity alterations equals
2.2 (diagram acc. to Schiedel).
H The drag coefficient Σζ = 2.2 covers, for
example, the losses of a connection
adaptor with an inlet less than 10 º and
two bends of 90 º and an increase in
velocity which may possibly be
required.
H We recommend that flue gases enter
the flue gas system at an angle of less
than 45 º.
Chimney diagram
Check, when applying the diagram,
whether the parameters for calculating
the flue gas temperature, length of
connection piece and of the drag
coefficient have been maintained.
In case of more severe deviations, the
technical departments of flue gas system
manufacturers will calculate
cross-sections, which are accurately
matched to each individual project.
Diagram for circular cross-sections (Schiedel)
Clearance cross-section in cm
1000
900
800
700
600
50
500
450
400
350
40
300
35
45
250
5822 239 GB
Rated output in kW
200
150
30
25
22
100
90
80
70
60
20
18
5
10
15
20
Effective height of the flue gas systems in metres
25
30
The diagram shown is also a valid representation for other manufacturers. The installing contractor should check how far this
diagram may be applied to the flue gas systems of other manufacturers.
11
2.6 Gas connection
2.7 Electrical connection
2.6 Gas connection
Gas installations should only be carried
out by an approved installer, who has
been authorised by the relevant gas
supplier.
Connect the mains gas acc. to TRGI ’86/96
or TRF 1996.
Max. test pressure 150 mbar.
We recommend the installation of a gas
filter acc. to DIN 3386 into the gas supply
line.
Thermal safety shut-off valve
According to. paragraph 4, sect. 5 of the
FeuVo ’96, thermal shut-off equipment ,
which isolate the gas supply if external
temperatures exceed 100 ºC should be
installed into gas-fired combustion
equipment. These valves should isolate
the gas supply for at least 30 minutes up
to a temperature of 650 ºC. This should
prevent the formation of explosive gas
mixtures in case of fires.
Additional requirements when installing
boilers with liquid gas operation in
rooms under ground level.
Acc. to TRF 1996 Vol. 2 – valid as of the
1st September 1997 – an external safety
solenoid valve is no longer required when
installing Vitogas 100 under ground level.
However, the high safety standard
derived from the use of an external safety
solenoid valve has proved to be valuable.
We therefore recommend the continued
installation of an external safety solenoid
valve when installing Vitogas 100 in
rooms below ground level. This valve is
connected directly to the burner.
2.7 Electrical connection
5822 239 GB
Implement the electrical connection and
the electrical installation in accordance
with VDE regulations, local regulations
and the technical specification for mains
electrical connections prescribed by your
electricity supplier.
12
2.8 Standard values for water quality
2.8 Standard values for water quality
The service life of the heat generator and
the complete heating system is
influenced by the water conditions.
In any event, the cost of a water
treatment facility is less than the cost of
repairing defects on your heating system.
It is necessary to maintain the following
requirements to safeguard your warranty
rights.
The manufacturer’s warranty excludes
damage due to corrosion and scaling.
The following is a summary of essential
requirements for water quality.
For comprehensive references, see the
separate Technical Guide ”Standard
values for water quality”.
Heating systems with rated operating temperatures up to100 ºC (VDI 2035)
Long-term experience has shown that
scaling does not need to be completely
prevented in order to safeguard against
system defects. For this reason, the VDI
guideline 2035 permits, depending on the
respective total boiler rating of your
system, a certain amount of
calcium hydrogen carbonate to enter the
system along with the filling water (see
also the corresponding explanatory
remarks in the original text of the relevant
guideline).
The total filling volume comprises the
initial fill and the volume of replenishing
water plus any refill (an exception would
be, if the boiler is de-scaled).
Requirements to be satisfied by the heating water
Total boiler system
. output
of the system [Q]
.
.
kW < Q≦
.
Q≦3100 kW
Calcium hydrogen carbonate concentration
[Ca(HCO3)2] of the fill and replenishing
water
Max. volume of water for filling and
replenishing [Vmax]
no requirement*1
no requirement*1
mol/m3
100
350 kW
350 kW < Q≦1000 kW
.
1000 kW < Q
Ca (HCO3)2 ≦ 2.0
Ca (HCO3)2 ≦ 1.5 mol/m3
Vmax [m3] = triple system volume
(or calculation of. Vmax as under
line: 1000 kW <Q)
–––
Vmax [m3] =
0.0313×
*1 The
.
*2
..
Q [kW]
Ca(HCO 3) 2 [mol∕m 3]
.
requirements for systems with Q >100 kW apply to boiler changes in existing systems with an original value of Q > 100 kW
and system water volume ≧ 20 litres/kW.
*2 Apply this equation for heating systems <100 kW and with a specific system volume ≧20 litres/kW.
5822 239 GB
Prevention of damage due to corrosion of the primary side
The corrosion resistance of ferrous
materials on the primary side of heating
systems and boilers depends on the
absence of oxygen in the heating water.
The oxygen introduced into the heating
system with both the first fill and with
replenishing water reacts with the system
materials, without causing damage. The
characteristic blackening of the water
after some time in use indicates, that free
oxygen is no longer present. The
Technical Rules and in particular the VDI
guideline 2035-2 therefore recommend,
that heating systems are designed and
operate so that a constant ingress of
oxygen into the heating water is
prevented.
the heating system, even the suction side
of the pump, should, under all operating
conditions, be higher than the ambient
atmospheric pressure. As a minimum
requirement, the inlet pressure of the
diaphragm expansion vessel should be
checked during the annual maintenance
procedure. Gas-permeable components,
e.g. plastic pipes in underfloor heating
systems, which are not impermeable,
should not be used. Provide system
separation if such components are used.
This should separate the water flowing
through the plastic pipes from other
heating circuits, e.g. from the heat
generator, by the provision of a corrosion
resistant heat exchanger.
Oxygen can normally only enter during
operation via
H open expansion vessels with water flow
H system vacuum
H gas-permeable components
Hot water heating systems which are
sealed – from a corrosion point of view –
and where the above points were taken
into consideration, require no additional
corrosion protection measures. However,
take additional precautions where there is
a danger of oxygen ingress, e.g. by adding
oxygen-binder sodium sulphite (5 – 10
mg/litre into the excess). The pH value of
the heating water should be between
8.2 - 9.5.
Correctly sized sealed systems operating
at the correct pressure – e.g. systems with
diaphragm expansion vessel – offer good
protection against the ingress of oxygen
from the air into the system. Every part of
Different conditions apply to systems
which include aluminium components.
If chemicals are used to protect the system
against corrosion, we would recommend
that your chemical supplier certifies the
suitability of additives vis-à-vis the boiler
materials and the materials of other
heating system components.
We recommend you refer to the respective
specialist in questions of water quality/
treatment.
VDI guideline 2035-2 contains further
details.
13
3.1 Application example 1
Application example 1 - Single boiler system with Vitogas 100 boiler and one heating circuit
with mixer for controlling the heating circuit and the DHW heating
System:
Single boiler system with
H Vitogas 100 (72 to 144 kW)
H Vitotronic 200 (type KW2)
or
Vitotronic 100 (type GC1) with
Vitocontrol control panel and integrated
weather-compensated Vitotronic 333
(type MW1S) control unit
or
Vitotronic 100 (type KC2) and external,
weather-compensated control unit (for
connections, see page 42)
Please note:
For single boiler systems with large water
contents (> 15 litres/kW) we recommend a
return temperature raising facility.
Possible applications:
Heating systems with distributor installed
close to the boiler.
Equipment required
(For standard systems – equipment with additional system modules, see Vitotec 2 folder)
Item
Number
Part no.
1
Boiler with Vitotronic
1
as per price list
2
Expansions for heating circuit with mixer in conjunction with Vitotronic 200 (type KW2)
– Extension kit for heating circuits with mixer
or
– Mixer motor for flanged mixer and plug-in connector
and
– Contact temperature sensor
or
– Immersion temperature sensor (incl. sensor well)
(see price list for further heating circuit control units)
1
7450 650
1
as per price list
1
7450 642
1
7450 641
5822 239
Description
14
3.1 Application example 1
Installation diagrams
A
52
2
1
20
M2
1
M2
2
3
90
41
40
2
20
2
52
1
A
5
28
52
2
20
M2
21
1
M2
2
2
3
90
41
40
1
28
21
20
2
52
5
1
2
B
5822 239
Plug-in connector
!
Outside temperature sensor*1
? M2 Flow temperature sensor mixer*1
§
Boiler temperature sensor
%
DHW cylinder temperature sensor
sÖ M2 Heating circuit pump mixer*1
A
B
Heating circuit with mixer
Domestic hot water cylinder
*1Only
for Vitotronic 200 (type KW2).
sA
sK
fÖ
Circulation pump for DHW
cylinder heating
DHW circulation pump*1
Electrical mains connection,
230V~/50 Hz
Install the mains isolator
according to local regulations.
fA
Burner (1st stage)
gS M2 Mixer motor*1
lÖ
Burner (2nd stage)
15
3.1 Application example 2
Application example 2 - Single boiler system with Vitogas 100 boiler and one heating circuit
with mixer and system separation
System:
Single boiler system with
H Vitogas 100 (72 to 144 kW)
H Vitotronic 200 (type KW2)
or
Vitotronic 100 (type GC1)
with Vitocontrol control panel and
integrated weather-compensated
Vitotronic 333 (type MW1S) control unit
or
Vitotronic 100 (type KC2) and external,
weather-compensated control unit (for
connections, see page 42)
H 3-way mixer.
Wiring diagram
Please note:
For single boiler systems with large water
contents (> 15 litres/kW) we recommend a
return temperature raising facility.
Pump connections for the underfloor
circuit
20
N
Possible applications:
Heating systems with normal water
contents.
Heating circuit with system separation of
underfloor heating.
L
B C
D
sÖ Heating circuit control
B Primary pump – underfloor heating
circuit
C Maximum temperature limiter for
underfloor heating circuit 3
D Secondary pump – underfloor heating
circuit (downstream of the system
separation)
Equipment required
(For standard systems – equipment with additional system modules, see Vitotec 2 folder)
Item
Description
Number
Part no.
1
Boiler with Vitotronic
1
as per price list
2
Expansions for heating circuit with mixer in conjunction with Vitotronic 200 (type KW2)
– Extension kit for one heating circuit with mixer
or
– Mixer motor for flanged mixer and plug-in connector
and
– Contact temperature sensor
or
– Immersion temperature sensor (incl. sensor well)
(see price list for further heating circuit control units)
1
7450 650
1
as per price list
1
7450 642
1
7450 641
1
7415 026
1
7415 025
1
as per price list
3
Vitotrans 100
5822 239
4
Maximum temperature limiter for underfloor heating
– Contact limit thermostat
or
– Immersion limit thermostat
16
3.1 Application example 2
Installation diagram
52
2
1
20
M2
M2
2
A
3
3
90
41
40
1
2
52
20
2
1
5822 239
Plug-in connector
!
Outside temperature sensor*1
? M2 Flow temperature sensor mixer*1
§
Boiler temperature sensor
A
Underfloor heating circuit
*1 Only
for Vitotronic 200 (type KW2).
4
sÖ M2 Heating circuit pump mixer*1
fÖ
Electrical mains connection,
230V~/50 Hz
Install the mains isolator
according to local regulations.
fA
gS M2
lÖ
Burner (1st stage)
Mixer motor*1
Burner (2nd stage)
17
3.1 Application example 3
Application example 3 - Single boiler system with Vitogas 100 boiler and one heating circuit
with mixer, distributor pump and low-pressure distributor
System:
Single boiler system with
H Vitogas 100 (72 to 144 kW)
H Vitotronic 200 (type KW2)
or
Vitotronic 100 (type GC1) with
Vitocontrol control panel and integrated
weather-compensated Vitotronic 333
(type MW1S) control unit
or
Vitotronic 100 (type KC2) and external,
weather-compensated control unit (for
connections, see page 42)
H Distributor pump
H Low-pressure distributor.
Possible applications:
If the distributor is located in remote
sub-stations (> 20 m). The heating
system volume flow must be able to be
reduced.
If it is not possible to reduce the heat
transfer to the heating circuits, e.g. in
older systems, we would recommend
that the boiler is connected in accordance
with the example on pages 28 and 29.
Function description:
Advantages:
If the actual temperature falls below the
required minimum return temperature, the
limit thermostat T1 reduces or closes the
mixer.
Size the distributor pump to 110% of the
total throughput capacity of the heating
system.
You will not need costly mixing valves to
raise the return temperature.
Wiring diagram
Connection of the limit thermostat T1
H in conjunction with Vitotronic 200 (type KW2)
H in conjunction with Vitotronic 100 (type KW2)
4
?
L1
C N
PE
K
closed closed closed
3
D
2
B
3
1
PTC
Connection of the heating circuit and distribution pump
H For pumps with a power consumption of ≦ 4A
H For pumps with a power consumption of ≧ 4A
20
N
20
N
L
L
L
N
C
4
K1
E
B
C
5
Flow temperature sensor ?
Mains electrical connection
230V~/50 Hz
5
E
D
Downstream heating circuit
control unit contact closed: signal
for ”Close mixer”
E
Heating circuit pump
Description
Number
Part no.
Boiler with Vitotronic
Expansions for heating circuit with mixer in conjunction with Vitotronic 200 (type KW2)
– Extension kit for heating circuits with mixer
or
– Mixer motor for flanged mixer and plug-in connector
and
– Contact temperature sensor
or
– Immersion temperature sensor (incl. sensor well)
1
as per price list
1
7450 650
1
as per price list
1
7450 642
1
7450 641
3
Limit thermostat T1
1
9581 658
4
5
Contactor relay
Distributor pump
1
1
7814 681
on site
Item
1
2
18
5822 239
Equipment required
(For standard systems – equipment with additional system modules, see Vitotec 2 folder)
3.1 Application example 3
Installation diagram
M2
2
2
20
52
2
5
T1
2
3
M2
2 20 52
1
1
28
21
5
150
90
41
40
3
1
A
Plug-in connector
!
Outside temperature sensor*1
? M2 Flow temperature sensor
mixer*1
§
Boiler temperature sensor
%
DHW cylinder temperature
sensor
sÖ M2 Heating circuit pump mixer*1
5822 239
A
*1Only
*2Only
sA
sK
fÖ
Circulation pump for DHW
cylinder heating
DHW circulation pump*1
Electrical mains connection,
230V~/50 Hz
Install the mains isolator
according to local regulations.
fA
gS M2
lÖ
aBÖ
Burner (1st stage)
Mixer motor*1
Burner (2nd stage)
External hooking up,
see page 42*2
Domestic hot water cylinder
for Vitotronic 200 (type KW2).
for Vitotronic 100 (type KC2).
19
3.1 Application example 4
Application example 4 - Single boiler system with Vitogas 100 boiler and two heating
circuits with mixer, distributor pump and low-pressure distributor
System:
Single boiler system with
H Vitogas 100 (72 to 144 kW)
H Vitotronic 300 (type GW2)
or
Vitotronic 100 (type GC1) with
Vitocontrol control panel and integrated
weather-compensated Vitotronic 333
(type MW1S) control unit
or
Vitotronic 100 (type KC2) and external,
weather-compensated control unit (for
connections, see page 42)
H Distributor pump
H Low-pressure distributor.
Possible applications:
If the distributor is located in remote
sub-stations (> 20 m). The heating
system volume flow must be able to be
reduced.
Function description:
If the actual temperature falls below the
required minimum return temperature, the
limit thermostat T1 reduces or closes the
mixer.
Size the distributor pump to 110% of the
total throughput capacity of the heating
system.
The boiler receives optimum protection
when using a Vitotronic 300. No
additional protective measures are
required on site.
If it is not possible to reduce the heat
transfer to the heating circuits, e.g. in
older systems, we would recommend
that the boiler is connected in accordance
with the example on pages 28 and 29.
Advantages:
You will not need costly mixing valves to
raise the return temperature.
Wiring diagram
Wiring for reducing the volume flow via the limit thermostat T1 in heating systems with heating circuit control units, which are not
connected to the boiler control unit via the LON BUS.
Connection of the limit thermostat T1
H in conjunction with Vitotronic 100 (type GC1)
Necessary coding:
change ”4C” to ”2” – use the plug-in connector sÖ A1 to
close the downstream mixer.
H in conjunction with Vitotronic 100 (type KC2)
4
L1
D N
PE
2
20
N
L
1
3
A1
4
C
D
closed closed closed
C
closed closed closed
C
Downstream heating circuit control unit contact
closed: signal for ”Close mixer”
Mains electrical connection, 230V~/50 Hz
The distributor pump must be connected to the external
control unit, if an external weather-compensated control unit
is used.
sÖ A1 Closing the mixer
C
Downstream heating circuit control unit contact
closed: signal for ”Close mixer”
Equipment required
(For standard systems – equipment with additional system modules, see Vitotec 2 folder)
Description
Number
Part no.
1
Boiler with Vitotronic
1
as per price list
2
Expansions for heating circuits with mixer with Vitotronic 300 (type GW2)
– Extension kit for one heating circuit with mixer
or
– Mixer motor for flanged mixer and plug-in connector
and
– Contact temperature sensor
or
– Immersion temperature sensor (incl. sensor well)
corresp. to
heating circuits
corresp. to
heating circuits
corresp. to
heating circuits
corresp. to
heating circuits
7450 650
1
7450 642
1
7450 641
3
Temperature sensor T1 (in conjunction with Vitotronic 300)
– Contact temperature sensor
or
– Immersion temperature sensor (incl. sensor well)
or
Temperature sensor T1 (in conjunction with Vitotronic 100)
as per price list
7450 642
7450 641
1
Z001 886
4
Contactor relay
1
7814 681
5
Distributor pump
1
on site
20
5822 239
Item
3.1 Application example 4
Installation diagram
A
M2
2
A
M3
2
2
20
20
52
52
2
5
M2
2 20 52
M3
2 20 52
1
1
T1
150
146
143
90
17A
3
41
2
29
28
21
5
40
2
3
1
B
Plug-in connector
!
Outside temperature sensor*1
? M2 Flow temperature sensor
mixer*1
? M3 Flow temperature sensor
mixer*1
§
Boiler temperature sensor
%
DHW cylinder temperature
sensor (accessory for Vitotronic
100)
aJ A
Temperature sensor T1*1
5822 239
A
B
*1Only
*2Only
sÖ M2
sÖ M3
sA
sK
sL
fÖ
Heating circuit pump mixer*1
Heating circuit pump mixer*1
Circulation pump for DHW
cylinder heating
DHW circulation pump*1
Distributor pump*1
Electrical mains connection,
230V~/50 Hz
Install the mains isolator
according to local regulations.
fA
gS M2
gS M3
lÖ
aVD
aVH
aBÖ
Burner (1st stage)
Mixer motor*1
Mixer motor*1
Burner (2nd stage)
External hooking up*1
External hooking up*1
see from page 44
External hooking up,
see page 42*2
Heating circuit with mixer
Domestic hot water cylinder
for Vitotronic 300 (type GW2).
for Vitotronic 100 (type KC2).
21
3.1 Application example 5
Application example 5 - Single boiler system with Vitogas 100 boiler and one heating circuit
with mixer plus shunt pump for raising the return temperature
System:
Single boiler system with
H Vitogas 100 (72 to 144 kW)
H Vitotronic 200 (type KW2)
or
Vitotronic 100 (type GC1) with
Vitocontrol control panel and integrated
weather-compensated Vitotronic 333
(type MW1S) control unit
or
Vitotronic 100 (type KC2) and external,
weather-compensated control unit (for
connections, see page 42)
H Shunt pump
Size the shunt pump to approx. 30 % of
the total throughput capacity of the boiler.
Possible applications:
Heating systems with distributor installed
close to the boiler. The boiler water
volume flow must be able to be reduced.
If it is not possible to reduce the boiler
water volume flow, e.g. in older systems,
we would recommend the example on
pages 28 and 29.
Function description:
The limit thermostat T2 activates the shunt
pump, if the actual temperature falls
below the required minimum return
temperature. If the minimum return
temperature is not reached even if the
return temperature is reached, the volume
flow must be reduced by at least 50 % via
the limit thermostat T1.
Advantages:
You will not need any boiler circuit pump
or costly mixing valve to raise the return
temperature.
Wiring diagram
Connection of the limit thermostat T1
H in conjunction with Vitotronic 200 (type KW2)
H in conjunction with Vitotronic 100 (type KC2)
6
?
C Flow temperature sensor ?
L1
D N
PE
K
closed closed closed
4
E
2
C
4
D Mains electrical connection,
230V~/50 Hz
E Downstream heating circuit control
unit contact closed: signal for
”Close mixer”
1
PTC
Connection of the heating circuit and shunt pumps
H For pumps with a power consumption of ≦ 4A
H For pumps with a power consumption of ≧ 4A
20
N
20
F Heating circuit pump
G Connection box (on site)
L
N
F Heating circuit pump
G Connection box (on site)
L
L
N
G
6
K1
1
F
2
1
3
2
3
F
2
3
2
3
Item
Description
Number
Part no.
1
2
Boiler with Vitotronic
Limit thermostat T2
1
1
as per price list
Z001 886
3
Shunt pump
1
on site
4
5
Limit thermostat T1
Expansions for heating circuit with mixer in conjunction with Vitotronic 200 (type KW2)
– Extension kit for one heating circuit with mixer
or
– Mixer motor for flanged mixer and plug-in connector
and
– Contact temperature sensor
or
– Immersion temperature sensor (incl. sensor well)
(see price list for further heating circuit control units)
Contactor relay
1
Z001 886
1
7450 650
1
as per price list
1
7450 642
1
7450 641
1
7814 681
6
22
5822 239
Equipment required
(For standard systems – equipment with additional system modules, see Vitotec 2 folder)
3.1 Application example 5
Installation diagram
A
M2
2
5
20
52
5
M2
2 20 52
1
1
28
21
5
150
90
41
40
3
3
4
2
T1
T2
1
B
Plug-in connector
!
Outside temperature sensor*1
? M2 Flow temperature sensor
mixer*1
§
Boiler temperature sensor
%
DHW cylinder temperature
sensor
sÖ M2 Heating circuit pump mixer*1
5822 239
A
B
*1 Only
*2 Only
sA
sK
fÖ
Circulation pump for DHW
cylinder heating
DHW circulation pump*1
Electrical mains connection,
230V~/50 Hz
Install the mains isolator
according to local regulations.
fA
gS M2
lÖ
aBÖ
Burner (1st stage)
Mixer motor*1
Burner (2nd stage)
External hooking up,
see page 42*2
Heating circuit with mixer
Domestic hot water cylinder
for Vitotronic 200 (type KW2).
for Vitotronic 100 (type KC2).
23
3.1 Application example 6
Application example 6 - Single boiler system with Vitogas 100 boiler and two heating
circuits with mixer plus shunt pump for raising the return temperature
System:
Function description:
Advantages:
Single boiler system with
H Vitogas 100 (72 to 144 kW)
H Vitotronic 300 (type GW2)
or
Vitotronic 100 (type GC1) with
Vitocontrol control panel and integrated
weather-compensated Vitotronic 333
(type MW1S) control unit
or
Vitotronic 100 (type KC2) and external,
weather-compensated control unit (for
connections, see page 42)
H Shunt pump
The temperature sensor T2 or the limit
thermostat T2 activates the shunt pump, if
the actual temperature falls below the
required minimum return temperature. If
the minimum return temperature is not
reached, even if the return temperature is
raised, the volume flow must be reduced
by at least 50 % via the temperature
sensor T1 or the limit thermostat T1.
Size the shunt pump to approx. 30 % of
the total throughput capacity of the boiler.
If it is not possible to reduce the boiler
water volume flow, e.g. in older systems,
we would recommend the example on
pages 28 and 29.
You will not need any costly boiler circuit
pump or mixing valve to raise the return
temperature.
The boiler receives optimum protection
when using a Vitotronic 300 (type GW2).
No additional on-site protective measures
are required.
5822 239
Possible applications:
Heating systems with distributor installed
close to the boiler. The boiler water
volume flow must be able to be reduced.
24
3.1 Application example 6
Wiring diagram
Connection of the temperature sensor or limit thermostat T1
H in conjunction with Vitotronic 300 (type GW2)
H in conjunction with Vitotronic 100 (type KC2)
Wiring for reducing the volume flow via the limit thermostat
T1 in heating systems with heating circuit control units,
which are not connected to the boiler control unit via the
LON BUS.
Necessary coding:
change ”4C” to ”2” – use the plug-in connector sÖ A1 to
close the downstream mixer.
closed closed closed
2
L
Downstream heating circuit control unit contact closed:
signal for ”Close mixer”
Mains electrical connection, 230V~/50 Hz
D
A1
C
1
C
20
N
6
L1
D N
PE
6
closed closed closed
C
sÖ A1 Closing the mixer
C
Downstream heating circuit control unit contact closed:
signal for ”Close mixer”
Connection of the heating circuit and the shunt pumps in conjunction with Vitotronic 100 (type KC2)
H For pumps with a power consumption of ≦ 4A
H For pumps with a power consumption of ≧ 4A
20
N
20
L
N
L
L
N
F
6
K1
1
E
2
1
3
3
E
2
3
2
3
E Heating circuit pump
5822 239
E Heating circuit pump
F Connection box (on site)
2
25
3.1 Application example 6
Equipment required
(For standard systems – equipment with additional system modules, see Vitotec 2 folder)
Description
Number
Part no.
1
Boiler with Vitotronic
1
as per price list
2
Temperature sensor T2 (in conjunction with Vitotronic 300 (type GW2)
– Contact temperature sensor
or
– Immersion temperature sensor (incl. sensor well)
or
Temperature sensor T2 (in conjunction with Vitotronic 100, type KC2)
1
7450 642
1
7450 641
1
Z001 886
1
on site
1
7450 642
1
7450 641
1
Z001 886
1 or 2
7450 650
1 or 2
as per price list
1 or 2
7450 642
1 or 2
7450 641
1
7814 681
Item
3
Shunt pump
4
Temperature sensor T1 (in conjunction with Vitotronic 300, type GW2)
– Contact temperature sensor
or
– Immersion temperature sensor (incl. sensor well)
or
Limit thermostat T1 (in conjunction with Vitotronic 100, type KC2)
5
Contactor relay
5822 239
6
Expansions for heating circuits with mixer in conjunction with Vitotronic 300 (type GW2)
– Extension kit for one heating circuit with mixer
or
– Mixer motor for flanged mixer and plug-in connector
and
– Contact temperature sensor
or
– Immersion temperature sensor (incl. sensor well)
(see price list for further heating circuit control units)
26
3.1 Application example 6
Installation diagram
A
M2
2
A
M3
2
5
5
20
20
52
52
5
A1
M2
20 2 20 52
1
M3
2 20 52
29
1
17B
17A
3
150
146
143
90
41
28
21
5
40
5
4
T1
3
2
T2
1
B
Plug-in connector
!
Outside temperature sensor*1
? M2 Flow temperature sensor
mixer*1
? M3 Flow temperature sensor
mixer*1
§
Boiler temperature sensor
%
DHW cylinder temperature
sensor
aJ A
Temperature sensor T1*1
aJ B
Temperature sensor T2*1
sÖ M2 Heating circuit pump mixer*1
5822 239
A
B
*1Only
*2Only
sÖ M3
sÖ A1
sA
sK
sL
fÖ
Heating circuit pump mixer*1
Closing the mixer with external
heating circuit control units*1
Circulation pump for DHW
cylinder heating
DHW circulation pump*1
Shunt pump*1
Electrical mains connection,
230V~/50 Hz
Install the mains isolator
according to local regulations.
fA
gS M2
gS M3
lÖ
aVD
aVH
aBÖ
Burner (1st stage)
Mixer motor*1
Mixer motor*1
Burner (2nd stage)
External hooking up*1
External hooking up*1
see from page 44
External hooking up,
see page 42*2
Heating circuit with mixer
Domestic hot water cylinder
for Vitotronic 300 (type GW2).
for Vitotronic 100 (type KC2).
27
3.1 Application example 7
Application example 7 - Single boiler system with Vitogas 100 boiler and two heating
circuits with mixer, shunt pump and 3-way mixer for raising the return temperature
System:
Function description:
Advantages:
Multi-boiler systems with
H Vitogas 100 (72 to 144 kW)
H Vitotronic 300 (type GW2)
or
Vitotronic 100 (type GC1)
with Vitocontrol control panel and
integrated weather-compensated
Vitotronic 333 (type MW1S) control unit
or
Vitotronic (type KC2) and external,
weather-compensated control unit (for
connections, see page 42)
H Shunt pump
H 3-way mixer
The limit thermostat T2 activates the shunt
pump, if the actual temperature falls
below the required minimum return
temperature. If this does not achieve the
required minimum return temperature, the
temperature sensor T1 closes the 3-way
mixer in proportion and therefore
safeguards the minimum return
temperature.
Proportional return temperature raising
to protect the boiler. A boiler circuit pump
is not required.
Boilers are protected against return
temperature, which are too low,
independent of the downstream heating
circuits.
Possible applications:
Heating systems, where downstream
heating circuits cannot be controlled, e.g.
older systems or nurseries.
System-specific coding
change ”0C” to ”1” – system with
constant return temperature control.
Equipment required
(For standard systems – equipment with additional system modules, see Vitotec 2 folder)
Description
Number
Part no.
1
Boiler with Vitotronic
1
as per price list
2
Shunt pump
1
on site
3
3-way mixer
1
as per price list
4
Temperature sensor T2 (in conjunction with Vitotronic 300, type GW2)
– Contact temperature sensor
or
– Immersion temperature sensor (incl. sensor well)
1
7450 642
1
7450 641
1
7450 642
1
7450 641
1 or 2
7450 650
1 or 2
as per price list
1 or 2
7450 642
1 or 2
7450 641
Item
5
Expansions for heating circuits with mixer in conjunction with Vitotronic 300 (type GW2)
– Extension kit for one heating circuit with mixer
or
– Mixer motor for flanged mixer and plug-in connector
and
– Contact temperature sensor
or
– Immersion temperature sensor (incl. sensor well)
(see price list for further heating circuit control units)
5822 239
6
Temperature sensor T1 (in conjunction with Vitotronic 300, type GW2)
– Contact temperature sensor
or
– Immersion temperature sensor (incl. sensor well)
28
3.1 Application example 7
Installation diagram
A
M2
2
A
M3
2
6
6
20
20
52
52
6
6
3
T2
M2
M3
A1
2 20 52 2 20 52 52 29
1
1
17B
17A
3
2
T1
5
146
143
90
41
40
28
21
5
4
1
B
Plug-in connector
!
Outside temperature sensor*1
? M2 Flow temperature sensor
mixer*1
? M3 Flow temperature sensor
mixer*1
§
Boiler temperature sensor
%
DHW cylinder temperature
sensor
aJ A
Temperature sensor T1*1
aJ B
Temperature sensor T2*1
5822 239
A
B
*1Only
sÖ M2
sÖ M3
sA
sK
sL
fÖ
Heating circuit pump mixer*1
Heating circuit pump mixer*1
Circulation pump for DHW
cylinder heating
DHW circulation pump*1
Shunt pump*1
Electrical mains connection,
230V~/50 Hz
Install the mains isolator
according to local regulations.
fA
gS A1
gS M2
gS M3
lÖ
aVD
aVH
Burner (1st stage)
Mixer motor return temperature
raising facility*1
Mixer motor*1
Mixer motor*1
Burner (2nd stage)
External hooking up*1
External hooking up*1
see from page 44
Heating circuit with mixer
Domestic hot water cylinder
for Vitotronic 300 (type GW2).
29
3.1 Application example 8
Application example 8 - Multi-boiler system with Vitogas 100 boilers and with
shunt pumps for raising the return temperature of each boiler
System:
Multi-boiler systems with
H Vitogas 100 (72 to 144 kW)
H Vitotronic 100 (type GC1) for every
boiler in the multi-boiler system
and
Vitotronic 333 (type MW1) one for the
whole multi-boiler system
or
Vitotronic 100 (type GC1) for every
boiler in the multi-boiler system
with Vitocontrol control panel and
integrated weather-compensated
Vitotronic 333 (type MW1S) control unit
or
Vitotronic 100 (type KC2) and external,
weather-compensated cascade control
unit with DHW cylinder temperature
control (for connections, see page 43)
H Vitotronic 050
H Shunt pumps.
Possible applications:
Heating systems with distributor installed
close to the boiler. The boiler water
volume flow will be reduced via the
motorised butterfly valves.
System-specific coding
For every Vitotronic 100 (type GC1) in the
standard delivery condition:
T1 changes the position of the motorised
butterfly valve:
T1 changes boiler circuit control unit:
change ”0C” to ”3” – butterfly valve
activates acc. to temperature.
change ”0D” to ”1” – T1 controls the
heating circuit control mixer.
The boiler receives optimum protection
when using Vitotronic 333 or if the
heating circuits are controlled via a
connected Vitotronic 050. No additional
on-site protective measures are required.
Advantages:
You will not need a boiler circuit pump or
costly mixing valve to raise the return
temperature.
Function description:
The temperature sensor T2 or the limit
thermostat T2 activates the shunt pump,
if the actual temperature falls below the
required minimum return temperature. If
the minimum return temperature is not
reached, even if a return temperature
raising facility is used, the volume flow
must be reduced by at least 50 % via the
temperature sensor T1, the limit
thermostat T1 or the heating circuit
control units.
Size the shunt pump to approx. 30% of
the total throughput capacity of the boiler.
The distributor pump(s) and the
motorised butterfly valve(s) must be
connected to the external control unit, if
an external cascade control unit is used.
Equipment required
(For standard systems – equipment with additional system modules, see Vitotec 2 folder)
Description
Number
Part no.
1
Boiler with Vitotronic 100 and Vitotronic 333
1
as per price list
2
Boiler with Vitotronic 100
1 to 3
as per price list
3
Expansions for heating circuits with mixer with Vitotronic 333 and Vitotronic 050
– Extension kit for one heating circuit with mixer
or
– Mixer motor for flanged mixer and plug-in connector
and
– Contact temperature sensor
or
– Immersion temperature sensor (incl. sensor well)
corresp. to
heating circuits
corresp. to
heating circuits
corresp. to
heating circuits
corresp. to
heating circuits
7450 650
corresp. to
heating circuits
as per price list
1 to 3
7450 642
1 to 3
7450 641
1 to 3
Z001 886
1 to 3
7450 642
1 to 3
7450 641
4
Vitotronic 050 (communication module LON required)
5
Temperature sensor T2 (in conjunction with Vitotronic 100, type GC1)
– Contact temperature sensor
or
– Immersion temperature sensor (incl. sensor well)
or
Temperature sensor T2 (in conjunction with Vitotronic 100, type KC2)
6
Temperature sensor T1 (in conjunction with Vitotronic 100, type GC1)
– Contact temperature sensor
or
– Immersion temperature sensor (incl. sensor well)
or
Limit thermostat T1 (in conjunction with Vitotronic 100, type KC2)
as per price list
7450 642
7450 641
1 to 3
Z001 886
7
Shunt pump
1 to 3
on site
8
Motorised butterfly valve
1 to 3
on site
30
5822 239
Item
3.1 Application example 8
Installation diagram
M2
M3
2 20 52 2 20 52
M2
2
3
20
20
52
52
3
LON
2
17B
17A
3
143
146
150
52 A1
90
40
8
29
2
17B
17A
3
143
146
150
29
52 A1
90
3
LON LON
1
41
3
3
LON LON
40
A
M3
2
3
Flow 2
LON
LON
40
143
1
A
41
1
28
5
21
20
52
A
LON
4
40
8
T2
T2
5
6
T1
5
6
7
1
T1
7
2
B
Plug-in connector
!
Outside temperature sensor*1
? Flow Flow temperature sensor, common
heating system flow*1
? M2 Flow temperature sensor mixer*1
? M3 Flow temperature sensor mixer*1
?
Flow temperature sensor
Vitotronic 050
§
Boiler temperature sensor
%
DHW cylinder temperature
sensor*1
aJ A
Temperature sensor T1*2
aJ B
Temperature sensor T2*2
sÖ M2
sÖ M3
sÖ
sA
sK
sL
fÖ
fA
5822 239
A
B
Heating circuit pump mixer*1
Heating circuit pump mixer*1
Heating circuit pump
Vitotronic 050
Circulation pump for DHW cylinder
heating*1
DHW circulation pump*1
Shunt pump*2
Electrical mains connection,
230V~/50 Hz
install the mains isolator according
to local regulations.
Burner (1st stage)
gS A1
gS M2
gS M3
gS
lÖ
aVD
aVH
aBÖ
LON
Motorised butterfly valve*2
Mixer motor*1
Mixer motor*1
Mixer motor Vitotronic 050
Burner (2nd stage)
External hooking up*1
External hooking up*1
see from page 44
External hooking up, *3
see page 43
Connection LON-BUS (free
connection with terminal resistor)
Heating circuit with mixer
Domestic hot water cylinder
*1Only
for Vitotronic 333.
for Vitotronic 100 (type GC1).
*3Only for Vitotronic 100 (type KC2).
*2Only
31
3.1 Application example 9
Application example 9 - Multi-boiler system with Vitogas 100 boilers
with distribution pump and low-pressure distributor
System:
Function description:
Wiring diagram
Multi-boiler systems with
H Vitogas 100 (72 to 144 kW)
H Vitotronic 100 (type GC1) for every
boiler in the multi-boiler system
and
Vitotronic 333 (type MW1) one for the
whole multi-boiler system
or
Vitotronic 100 (type GC1) for every
boiler in the multi-boiler system
with Vitocontrol control panel and
integrated weather-compensated
Vitotronic 333 (type MW1S) control unit
or
Vitotronic 100 (type KC2) and external,
weather-compensated cascade control
unit with DHW cylinder temperature
control (for connections, see page 43)
H Vitotronic 050
H Distributor pump
H Low-pressure distributor.
If the actual temperature falls below the
required minimum return temperature, the
temperature sensor T1 or the limit
thermostat T1 reduces or closes the mixer.
Size the distributor pump to 110% of the
total throughput capacity of the heating
system.
Wiring for reducing the volume flow via
the limit thermostat T1 in heating
systems with heating circuit control units,
which are not connected to the boiler
control unit via the LON BUS.
Coding required at every Vitotronic 100
(type GC1):
change ”4C” to ”2” – use the plug-in
connector sÖ A1 to close the downstream
mixer.
If there is no possibility of reducing the
heat transfer to the heating circuits, e.g.
in older systems, we would recommend
that the boiler is connected in accordance
with the examples on pages 34 to 39.
D
L1
N
PE
K1
E
20 A1
20 A1
E
8
8
Advantages:
Possible applications:
If the distributor is located in remote
sub-stations (> 20 m). The heating
system volume flow must be able to be
reduced.
You will not need costly mixing valves to
raise the return temperature.
System-specific coding
On Vitotronic 333
change ”4D” to ”0” – use the plug-in
connector sL for the distributor pump.
On every Vitotronic 100 (type GC1),
change ”0D” to ”1” – T1 affects the
heating circuit control unit.
Equipment required
(For standard systems – equipment with additional system modules, see Vitotec 2 folder)
K2
closed closed closed
C
1
2 . . . n
sÖ A1 Closing the mixer
C
Downstream heating circuit
control unit contact closed: signal
for ”Close mixer”
D
Mains electrical connection,
230V~/50 Hz
E
Connection box, on site
The distributor pump and the motorised
butterfly valve(s) must be connected to
the external control unit, if an external
cascade control unit is used.
Description
Number
1
Boiler with Vitotronic 100 and Vitotronic 333
1
as per price list
2
Boiler with Vitotronic 100
1 to 2
as per price list
3
Expansions for heating circuits with mixer with Vitotronic 333 and Vitotronic 050
– Extension kit for heating circuits with mixer
or
– Mixer motor for flanged mixer and plug-in connector
and
– Contact temperature sensor
or
– Immersion temperature sensor (incl. sensor well)
corresp. to
heating circuits
corresp. to
heating circuits
corresp. to
heating circuits
corresp. to
heating circuits
7450 650
corresp. to
heating circuits
as per price list
1 to 3
7450 642
1 to 3
7450 641
1*1
Z001 886
Item
4
Vitotronic 050 (communication module LON required)
5
Temperature sensor T1 (in conjunction with Vitotronic 100, type GC1)
– Contact temperature sensor
or
– Immersion temperature sensor (incl. sensor well)
or
Limit thermostat T1 (in conjunction with Vitotronic 100, type KC2)
Part no.
as per price list
7450 642
7450 641
6
Distributor pump
1
on site
7
Motorised butterfly valve
1 to 3
on site
8
Contactor relay
1 to 2
7814 681
*1Connect
32
once to the main return line.
5822 239
The boiler receives optimum protection
when using Vitotronic 333 and if the
heating circuits are controlled via a
connected Vitotronic 050. No additional
on-site protective measures are required.
3.1 Application example 9
Installation diagram
M2
M3
2 20 52 2 20 52
1
28
5
21
1
3
Flow 2
LON
LON
29
143
LON
2
A
A
M3
2
M2
2
3
3
20
20
40
20
52
A
LON
4
40
52
52
3
3
3
6
LON LON
2
T1
17A
3
T1
17A
3
1
143
146
150
52 A1
90
7
41
5
40
143
146
150
52 A1
90
41
40
1
LON LON
5
7
2
B
Plug-in connector
!
Outside temperature sensor*1
? Flow Flow temperature sensor, common
heating system flow*1
? M2 Flow temperature sensor mixer*1
? M3 Flow temperature sensor mixer*1
?
Flow temperature sensor
Vitotronic 050
§
Boiler temperature sensor
%
DHW cylinder temperature
sensor*1
aJ A
Temperature sensor T1*2
sÖ M2
Heating circuit pump mixer*1
5822 239
A
B
sÖ M3
sÖ
sA
sK
sL
fÖ
fA
Heating circuit pump mixer*1
Heating circuit pump
Vitotronic 050
Circulation pump for DHW cylinder
heating*1
DHW circulation pump*1
Distributor pump*1
Electrical mains connection,
230V~/50 Hz
Install the mains isolator according
to local regulations.
Burner (1st stage)
gS A1
gS M2
gS M3
gS
lÖ
aVD
aVH
aBÖ
LON
Motorised butterfly valve*2
Mixer motor*1
Mixer motor*1
Mixer motor Vitotronic 050
Burner (2nd stage)
External hooking up*1
External hooking up*1
see from page 44
External hooking up, *3
see page 43
Connection LON-BUS (free
connection with terminal resistor)
Heating circuit with mixer
Domestic hot water cylinder
*1Only
for Vitotronic 333.
for Vitotronic 100 (type GC1).
*3Only for Vitotronic 100 (type KC2).
*2Only
33
3.1 Application example 10
Application example 10 - Multi-boiler system with Vitogas 100 boilers
with distributor pump and injection circuit
System:
Function description:
Wiring diagram
Multi-boiler systems with
H Vitogas 100 (72 to 144 kW)
H Vitotronic 100 (type GC1) for every
boiler in the multi-boiler system
and
Vitotronic 333 (type MW1) one for the
whole multi-boiler system
or
Vitotronic 100 (type GC1) for every
boiler in the multi-boiler system
with Vitocontrol control panel and
integrated weather-compensated
Vitotronic 333 (type MW1S) control unit
or
Vitotronic 100 (type KC2) and external,
weather-compensated cascade control
unit with DHW cylinder temperature
control (for connections, see page 43)
H Vitotronic 050
H Distributor pump
H Injection circuit.
If the actual temperature falls below the
required minimum return temperature,
the temperature sensor T1 or the limit
thermostat T1 reduces or closes the
mixer.
Wiring for reducing the volume flow via
the limit thermostat T1 in heating
systems with heating circuit control units,
which are not connected to the boiler
control unit via the LON BUS.
Size the distributor pump to 110% of the
total throughput capacity of the heating
system.
Coding required at every Vitotronic 100
(type GC1):
change ”4C” to ”2” – use the plug-in
connector sÖ A1 to close the downstream
mixer.
Possible applications:
If the distributor is located in remote
sub-stations (> 20 m), and the heating
circuits require heat immediately after a
demand is created, e.g. blown air-heaters.
The heat transfer to the heating circuits
must be able to be reduced.
Advantages:
System-specific coding
On Vitotronic 333
change ”4D”to”0” – use the plug-in
connector sL for the distributor pump.
For every Vitotronic 100 (type GC1)
change ”0D” to ”1” – T1 affects the
heating circuit control unit.
The injection circuit provides heat at the
consumers immediately upon demand.
For this purpose, the 3-way mixer will be
controlled.
If there is no possibility of reducing the
heat transfer to the heating circuits, e.g.
in older systems, we would recommend
that the boiler is connected in accordance
with the examples on pages 34 to 39.
E
L1
N
PE
K1
K2
F
20 A1
20 A1
F
You will not need any shunt pumps or
costly mixing valve to raise the return
temperature.
The boiler receives optimum protection
when using Vitotronic 333 (type MW1) or
if the heating circuits are controlled via a
connected Vitotronic 050. No additional
on-site protective measures are required.
8
8
closed closed closed
D
1
2 . . . n
sÖ A1 Closing the mixer
D
Downstream heating circuit
contact closed: signal for ”Close
mixer”
E
Mains electrical connection,
230V~/50 Hz
F
Connection box, on site
The distributor pump and the motorised
butterfly valve(s) must be connected to
the external control unit, if an external
cascade control unit is used.
Equipment required
(For standard systems – equipment with additional system modules, see Vitotec 2 folder)
Description
Number
Part no.
1
Boiler with Vitotronic 100 and Vitotronic 333
1
as per price list
2
Boiler with Vitotronic 100
1 to 2
as per price list
3
Expansions for heating circuits with mixer with Vitotronic 333 and Vitotronic 050
– Extension kit for one heating circuit with mixer
or
– Mixer motor for flanged mixer and plug-in connector
and
– Contact temperature sensor
or
– Immersion temperature sensor (incl. sensor well)
corresp. to
heating circuits
corresp. to
heating circuits
corresp. to
heating circuits
corresp. to
heating circuits
7450 650
corresp. to
heating circuits
as per price list
1 to 3
7450 642
1 to 3
7450 641
1*1
Z001 886
Distributor pump
1
on site
7
Motorised butterfly valve
1 to 3
on site
8
Contactor relay
1 to 2
7814 681
4
Vitotronic 050 (communication module LON required)
5
temperature sensor T1 (in conjunction with Vitotronic 100, type GC1)
– Contact temperature sensor
or
– Immersion temperature sensor (incl. sensor well)
or
Limit thermostat T1 (in conjunction with Vitotronic 100, type KC2)
6
*1Connect
34
once to the main return line.
as per price list
7450 642
7450 641
5822 239
Item
3.1 Application example 10
Installation diagram
M2
M3
2 20 52 2 20 52
1
28
5
21
1
M2
2
3
Flow 2
3
20
B
LON
LON
29
143
LON
A
M3
2
20
40
A
LON
20
2
A
52
4
40
3
B
B
52
52
3
3
3
6
LON LON
2
T1
17A
3
T1
17A
3
1
143
146
150
52 A1
90
7
41
5
40
143
146
150
52 A1
90
41
40
1
LON LON
5
7
2
C
Plug-in connector
!
Outside temperature sensor*1
? Flow Flow temperature sensor, common
heating system flow*1
? M2 Flow temperature sensor mixer*1
? M3 Flow temperature sensor mixer*1
?
Flow temperature sensor
Vitotronic 050
§
Boiler temperature sensor
%
DHW cylinder temperature
sensor*1
aJ A
Temperature sensor T1*2
sÖ M2
Heating circuit pump mixer*1
5822 239
A
B
Heating circuit with mixer
Injection circuit
sÖ M3
sÖ
fA
Heating circuit pump mixer*1
Heating circuit pump
Vitotronic 050
Circulation pump for DHW cylinder
heating*1
DHW circulation pump*1
Distributor pump
Electrical mains connection,
230V~/50 Hz
Install the mains isolator according
to local regulations.
Burner (1st stage)
C
DHW cylinder
sA
sK
sL
fÖ
gS A1
gS M2
gS M3
gS
lÖ
aVD
aVH
aBÖ
LON
Motorised butterfly valve
Mixer motor*1
Mixer motor*1
Mixer motor Vitotronic 050
Burner (2nd stage)
External hooking up*1
External hooking up*1
see from page 44
External hooking up, *3
see page 43
Connection LON-BUS (free
connection with terminal resistor)
*1Only
for Vitotronic 333.
for Vitotronic 100 (type GC1).
*3Only for Vitotronic 100 (type KC2).
*2Only
35
3.1 Application example 11
Application example 11 - Multi-boiler system with Vitogas 100 boilers
and 3-way mixing valve for raising the return temperature
System:
Function description:
Advantages:
Multi-boiler systems with
H Vitogas 100 (72 to 144 kW)
H Vitotronic 100 (type GC1) for every
boiler in the multi-boiler system
and
Vitotronic 333 (type MW1) one for the
whole multi-boiler system
or
Vitotronic 100 (type GC1) for every
boiler in the multi-boiler system
with Vitocontrol control panel and
integrated weather-compensated
Vitotronic 333 (type MW1S) control unit
or
Vitotronic 100 (type KC2) and external,
weather-compensated cascade control
unit with DHW cylinder temperature
control (for connections, see page 43)
H Vitotronic 050
H and 3-way mixing valve for raising the
return temperature.
If this does not achieve the required
minimum return temperature, the
temperature sensor T1 closes the 3-way
mixing valve in proportion and therefore
ensures the boiler protection.
Proportional return temperature raising
to protect the boiler.
Boilers are protected against return
temperatures which are too low,
independent of the downstream heating
circuits.
Boiler and downstream heating circuits
are hydraulically coupled together.
The flow temperature is controlled by the
common temperature sensor.
Possible applications:
For example, older heating systems
and/or systems, where downstream
heating circuits cannot be controlled.
System-specific coding
at every Vitotronic 100 (type GC1)
change ”0C” to ”1” – system with
constant return temperature control for
every boiler.
change ”4D” to ”2” – use the plug-in
connector sL for the boiler circuit pump.
Equipment required
(For standard systems – equipment with additional system modules, see Vitotec 2 folder)
Item
Description
Number
Part no.
1
Boiler with Vitotronic 100 and Vitotronic 333
1
as per price list
2
Boiler with Vitotronic 100
1 to 2
as per price list
3
Expansions for heating circuits with mixer with Vitotronic 333 and Vitotronic 050
– Extension kit for one heating circuit with mixer
or
– Mixer motor for flanged mixer and plug-in connector
and
– Contact temperature sensor
or
– Immersion temperature sensor (incl. sensor well)
corresp. to
heating circuits
corresp. to
heating circuits
corresp. to
heating circuits
corresp. to
heating circuits
7450 650
corresp. to
heating circuits
as per price list
1 to 3
7450 642
4
Vitotronic 050 (communication module LON required)
5
Temperature sensor T1 (in conjunction with Vitotronic 100, type GC1)
– Contact temperature sensor
or
– Immersion temperature sensor (incl. sensor well)
as per price list
7450 642
7450 641
7450 641
3-way mixing valve
1 to 3
on site
7
Boiler circuit pump
1 to 3
on site
5822 239
1 to 3
6
36
3.1 Application example 11
Installation diagram
M2
M3
2 20 52 2 20 52
3
Flow 2
LON
52
3
LON LON
2
40
LON
2
17A
3
143
146
150
17A
3
143
146
150
29
52 A1
90
3
LON LON
1
41
3
52
3
90
LON
40
143
3
20
20
40
A
M3
2
29
52 A1
1
A
41
1
28
5
21
M2
2
20
52
A
LON
4
40
7
1
7
5
5
T1
T1
6
2
6
B
Plug-in connector
!
Outside temperature sensor*1
? Flow Flow temperature sensor, common
heating system flow*1
? M2 Flow temperature sensor mixer*1
? M3 Flow temperature sensor mixer*1
?
Flow temperature sensor
Vitotronic 050
§
Boiler temperature sensor
%
DHW cylinder temperature
sensor*1
aJ A
Temperature sensor T1*2
sÖ M2
Heating circuit pump mixer*1
5822 239
A
B
sÖ M3
sÖ
sA
sK
sL
fÖ
fA
Heating circuit pump mixer*1
Heating circuit pump
Vitotronic 050
Circulation pump for DHW cylinder
heating*1
DHW circulation pump*1
Boiler circuit pump*2
Electrical mains connection,
230V~/50 Hz
Install the mains isolator according
to local regulations.
Burner (1st stage)
gS A1
gS M2
gS M3
gS
lÖ
aVD
aVH
aBÖ
LON
3-way mixing valve
Mixer motor*1
Mixer motor*1
Mixer motor Vitotronic 050
Burner (2nd stage)
External hooking up*1
External hooking up*1
see from page 44
External hooking up, *3
see page 43
Connection LON-BUS (free
connection with terminal resistor)
Heating circuit with mixer
Domestic hot water cylinder
*1Only
for Vitotronic 333.
for Vitotronic 100 (type GC1).
*3Only for Vitotronic 100 (type KC2).
*2Only
37
3.1 Application example 12
Application example 12 - Multi-boiler system with Vitogas 100 boiler with low-loss header
and 3-way mixing valve for raising the return temperature
System:
Multi-boiler system with
H Vitogas 100 (72 to 144 kW)
H Vitotronic 100 (type GC1) for every
boiler in the multi-boiler system
and
Vitotronic 333 (type MW1) one for the
whole multi-boiler system
or
Vitotronic 100 (type GC1) for every
boiler in the multi-boiler system
with Vitocontrol control panel and
integrated weather-compensated
Vitotronic 333 (type MW1S) control unit
or
Vitotronic 100 (type KC2) and external,
weather-compensated cascade control
unit with DHW cylinder temperature
control (for connections, see page 43)
H Vitotronic 050
H 3-way mixing valve for raising the
return temperature
H Low loss header.
System-specific coding
at every Vitotronic 100 (type GC1)
change ”0C” to ”1” – system with
constant return temperature raising for
every boiler.
change ”4D” to ”2” – use the plug-in
connector sL for the boiler circuit pump.
Function description:
Advantages:
Boiler and downstream heating circuits
are hydraulically coupled together.
Proportional return temperature raising
to protect the boiler.
Boilers are protected against return
temperatures, which are too low,
independent of the downstream heating
circuits.
If the actual temperature falls below the
required minimum return temperature,
the temperature sensor T1 closes the
3-way mixing valve in proportion and
therefore ensures the boiler is protected.
The flow temperature is controlled by the
temperature sensor of the low-loss
header.
Possible applications:
For example older systems or system,
where the hydraulic conditions cannot be
clearly defined and/or systems, where
downstream heating circuits cannot be
controlled.
Equipment required
(For standard systems – equipment with additional system modules, see Vitotec 2 folder)
Description
Number
Part no.
1
Boiler with Vitotronic 100 and Vitotronic 333
1
as per price list
2
Boiler with Vitotronic 100
1 to 2
as per price list
3
Expansions for heating circuits with mixer with Vitotronic 333 and Vitotronic 050
– Extension kit for one heating circuit with mixer
or
– Mixer motor for flanged mixer and plug-in connector
and
– Contact temperature sensor
or
– Immersion temperature sensor (incl. sensor well)
corresp. to
heating circuits
corresp. to
heating circuits
corresp. to
heating circuits
corresp. to
heating circuits
7450 650
corresp. to
heating circuits
as per price list
1 to 3
7450 642
1 to 3
7450 641
Item
4
Vitotronic 050 (communication module LON required)
5
Temperature sensor T1 (in conjunction with Vitotronic 100, type GC1)
– Contact temperature sensor
or
– Immersion temperature sensor (incl. sensor well)
as per price list
7450 642
7450 641
3-way mixing valve
1 to 3
on site
7
Boiler circuit pump
1 to 3
on site
8
Low loss header
1
on site
5822 239
6
38
3.1 Application example 12
Installation diagram
1
28
5
21
A
Flow 2
LON
2
20
A
M2
2
LON
LON
40
143
1
52
M2
M3
2 20 52 2 20 52
LON
4
40
A
M3
2
3
3
20
20
52
52
3
3
3
3
8
LON LON
LON LON
17A
3
143
146
150
90
41
40
29
52 A1
2
17A
3
143
146
150
29
52 A1
90
41
40
1
7
1
7
5
5
T1
T1
6
2
6
B
Plug-in connector
!
Outside temperature sensor*1
? Flow Flow temperature sensor, common
heating system flow*1
? M2 Flow temperature sensor mixer*1
? M3 Flow temperature sensor mixer*1
?
Flow temperature sensor
Vitotronic 050
§
Boiler temperature sensor
%
DHW cylinder temperature
sensor*1
aJ A
Temperature sensor T1*2
sÖ M2
Heating circuit pump mixer*1
5822 239
A
B
sÖ M3
sÖ
sA
sK
sL
fÖ
fA
Heating circuit pump mixer*1
Heating circuit pump
Vitotronic 050
Circulation pump for DHW cylinder
heating*1
DHW circulation pump*1
Boiler circuit pump
Electrical mains connection,
230V~/50 Hz
Install the mains isolator according
to local regulations.
Burner (1st stage)
gS A1
gS M2
gS M3
gS
lÖ
aVD
aVH
aBÖ
LON
3-way mixing valve
Mixer motor*1
Mixer motor*1
Mixer motor Vitotronic 050
Burner (2nd stage)
External hooking up*1
External hooking up*1
see from page 44
External hooking up, *3
see page 43
Connection LON-BUS (free
connection with terminal resistor)
Heating circuit with mixer
Domestic hot water cylinder
*1Only
for Vitotronic 333.
for Vitotronic 100 (type GC1).
*3Only for Vitotronic 100 (type KC2).
*2Only
39
3.2 Domestic hot water heating with cylinder loading system
3.2 Domestic hot water heating with cylinder loading system
The Viessmann cylinder loading system is
a combination of a Vitocell-L cylinder and
a Vitotrans heat exchanger set. The
cylinder loading system for DHW heating
is a preferred choice for:
H large storage capacities with offset
loading and drawing times, e.g. water is
drawn off in bursts at schools, sports
centres, hospitals, army camps, social
buildings, etc.
H short-term peak loads, i.e. high draw-off
rates and various re-heat times, e.g.
domestic hot water heating in
swimming pools, sports facilities,
industrial companies, etc.
H limited space as the cylinder loading
system can transfer a high output.
28
The DHW cylinder loading system
can be 1 controlled by a Vitotronic 100
(type GC1), 300 (type GW2) or 333.
Control can be achieved via a mixer
through Vitotronic 050 (type HK1W, HK1S,
HK3W or HK3S), if these control units are
not available or if there are several
cylinder loading systems.
1
5
5
21 17 B 52 A1 20 A1
Vitocell-L 100/300
Boiler
System-specific coding on Vitotronic 1
Change ”4C” to ”1” – use the plug-in
connector sÖ as primary pump for the
heat exchanger set.
Change ”4E” to ”1” – use the
output gS as primary control unit for the
heat exchanger set.
Change ”55” to ”3” – use the DHW
cylinder thermostat for the heat
exchanger set.
5822 239 GB
Plug-in connector
%
Cylinder temperature sensor (top)
%
Cylinder temperature sensor
(bottom)
aJ B Temperature sensor Vitotrans 222
sÖ A1 Primary pump connection in the
cylinder loading system
sA
Secondary pump connection in
the cylinder loading system
sK
DHW circulation pump (not for
Vitotronic 100)
gS A1 3-way valve Vitotrans 222
Vitotrans 222
(heat exchanger set)
40
3.2 Domestic hot water heating with cylinder loading system
Notes regarding the application examples (chapter 3.1)
Application example 6
The sensor input aJ B is used to control
the Vitotrans 222 heat exchanger set.
Therefore, the shunt pump must be
controlled by a separate thermostat (see
figure adjacent).
L1
N
PE
A
B
C
A Connection box, on site
B Shunt pump
C Limit thermostat, part no. Z001 886
Application example 7
A separate Vitotronic 050 must be used
for controlling the Vitotrans 222 heat
exchanger set. The Vitotronic boiler
control unit affects the constant return
temperature control.
Application examples 8 to 12 (multi-boiler systems)
5822 239 GB
The Vitotrans 222 heat exchanger set is
controlled by Vitotronic 333.
41
3.3 Installation notes
3.3 Installation notes
Connection of an on-site control unit to Vitotronic 100 (type KC2) – single boiler systems
Operation with a two-stage burner
Plug-in connectors inside the control unit
150
STB PE
N
STB TR
TR
ON ON
Volt-free contacts of the overriding
control units:
Remove the wire jumper from the plug-in
connector a-D.
Settings on Vitotronic 100
The high limit safety cut-out settings and
other settings depend on the system
equipment and the safety equipment acc.
to DIN 4751-2.
1st burner stage ON
High limit safety
cut-out
110 ºC
100 ºC
Control thermostat
100 ºC
87 ºC
Maximum
temperature of the
on-site control unit
95 ºC
80 ºC
Control unit cable
(plug-in adaptor 2nd stage)
blue
B5
black
90
brown
2nd burner stage ON
Connection to T8 = full load
Connection to T7 = partial load
T6
T7
T8
5822 239 GB
Plug-in connector for Vitotronic 100 (type
KC2) to the burner
42
3.3 Installation notes
Connection of an on-site control unit to Vitotronic 100 (type KC2) – multi-boiler systems
Operation with a two-stage burner
Plug-in connectors inside the control unit
150
STB PE
N
STB TR
TR
ON ON
Volt-free contacts of the overriding
control units:
Remove the wire jumper from the plug-in
connector a-D.
The contact ”enable boiler” must be
constantly closed at the lead boiler and
closed on demand at the lag boiler.
Enable boiler
1st burner stage ON
Settings on Vitotronic 100
The high limit safety cut-out settings and
other settings depend on the system
equipment and the safety equipment acc.
to DIN 4751-2.
High limit safety
cut-out
110 ºC
100 ºC
Control thermostat
100 ºC
87 ºC
Maximum
temperature of the
on-site control unit
95 ºC
80 ºC
Control unit cable
(plug-in adaptor 2nd stage)
blue
B5
black
90
brown
2. burner stage ON
Connection to T8 = full load
Connection to T7 = partial load
T6
T7
T8
5822 239 GB
Plug-in connector for Vitotronic 100 (type
KC2) to the burner
43
3.3 Installation notes
Additional connection options
H to
Vitotronic 200 (type KW2)
Additional connections to Vitotronic 200
(type KW2) are possible in conjunction
with the switching module V (part no.
7143 513) (see installation instructions
for switching module V).
H to
Vitotronic 300 (type GW2) and Vitotronic 333 (type MW1)
External switch-on subject to load
When the volt-free contact between
terminals ”2” and ”3” at the plug-in
connection aVH closes, the boiler
burner and possibly the burners of
other boilers (via Vitotronic 333) may be
switched on, subject to load.
The boiler water temperature is limited
via the maximum set boiler water
temperature or via the mechanical
thermostat.
The set value is adjusted via coding
”9B”.
External blocking or mixer ”close”
The burner is shut down or the mixer is
closed when the volt-free contact
between terminals ”2” and ”3” at the
plug-in connection aVD closes.
The boiler is excluded from the
sequential control, the associated
pumps are switched off and the shut-off
equipment is closed.
Coding ”99”
Burner ”off”
Please note:
The frost protection of the boiler or
heating circuit is no longer effective
during the controlled shut-down or
when the mixer ”closes”, i.e. the lower
boiler water temperature and flow
temperatures are no longer being
maintained.
Heating circuit 1
(mixer circuit M1)
You can pre-select via coding ”99”, to
which circuits input aVD will apply.
Heating circuit 2
(mixer circuit M2)
Heating circuit 3
(mixer circuit M3)
”0”
x
”1”
x
”2”
x
”3”
x
x
”4”
x
”5”
”6”
x
”7”
x
”9”
x
”10”
x
”11”
x
”12”
x
”13”
x
”14”
x
”15”
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
5822 239 GB
”8”
x
44
3.3 Installation notes
Change of external heating program/mixer open
Also applicable to Vitotronic 050
The manually pre-selected heating
program can be changed or the
connected mixer can be opened via the
volt-free plug-in connection aVD
terminals ”1” and ”2”.
Manually pre-selected heating program
(heating program with open contact)
Coding 2
enables changes after
<–>
Changed heating program
Changes can be made in all listed heating
programs
(heating program with closed contact)
9
or
Room heating off/hot water off
D5 : 0
<–>
9
w
or
Room heating off/hot water on
<–>
rw Room heating constantly on/DHW on
rw
Room heating on/hot water on
Room heating off/hot water off
(”as delivered”condition)
D5 : 1
Code ”91” enables the external heating
program to be allocated to the
individual heating circuits:
Coding ”91”
Heating circuit 1
(mixer circuit M1 or directly
connected heating circuit A1)
Heating circuit 2
(mixer circuit M2)
Heating circuit 3
(mixer circuit M3)
”0”
x
”1”
x
”2”
x
”3”
x
x
”4”
x
”5”
”6”
x
”7”
x
x
x
x
x
External mixer open
Code ”9A” enables the external
function ”Mixer open” to be allocated
to the individual heating circuits:
Code ”9A”
Heating circuit 1
(mixer circuit M1)
Heating circuit 2
(mixer circuit M2)
Heating circuit 3
(mixer circuit M3)
”0”
”1”
x
x
”2”
”3”
x
x
x
”4”
”5”
x
5822 239 GB
”6”
”7”
x
x
x
x
x
x
45
3.3 Installation notes
Connection to the external changeover facility
The connection is made on site via
terminals ”1” and ”2” of the plug-in
connector aVH.
143
1 2 3
146
1 2 3
External request
External blocking/close mixer
External heating program changeover/
open mixer
H to
Vitotronic 100 (type GC1) in conjunction with Vitotronic 333 (type MW1)
Volt-free contacts:
Block boiler
Start boiler as the last one in the boiler
sequence
143
Contact closed:
The boiler is blocked.
It is taken out of the boiler sequence, i.e.
the butterfly valve or the 3-way mixing
valve is closed for constant return
temperature control and the shunt or
boiler circuit pumps are switched off. The
other boilers must provide the required
heating.
Please note:
The heating system is no longer
protected against frost if all boilers are
blocked or there are no other available
boilers.
Contact open:
The boiler is reinstated into the current
boiler sequence.
46
Start boiler as the last one in the boiler
sequence
Connect the volt-free contact at
terminals ”2” and ”3” of plug aVD.
Contact closed:
The boiler is started as the last one in the
boiler sequence.
The heat demand of the heating system is
being met by the other boilers. This boiler
is started if the other boilers do not
provide sufficient heat.
Contact open:
The boiler is reinstated into the current
boiler sequence.
5822 239 GB
Block boiler
Connect the volt-free contact at
terminals ”1” and ”2” of plug aVD.
3.3 Installation notes
3.4 On-site control equipment via LON BUS
Electrical connection of a motorised flue gas damper
150
STB PE
N
STB TR
TR
ON ON
1
1 2 3
Si
Flue gas damper
motor
*1 remove
b)
the wire jumper
Plug-in adaptor for external safety equipment
Several additional pieces of safety
equipment may be connected:
H Low water indicator
H Minimum pressure limiter
H Maximum pressure limiter
H Additional high limit safety cut-out
and 3 external fault messages (e.g. pump
or neutralisation system).
The plug-in adaptor enables faults to be
displayed at the respective control unit
and the transfer via communication
equipment to mobile ‘phones, fax or a
control centre.
The respective fault can be displayed in
plain text.
3.4 Hooking up on-site control equipment via LON BUS to Vitotronic 300
(type GW2) and Vitotronic 333 (type MW1)
5822 239 GB
Vitotronic control units are equipped with
an open standard interface, i.e. the LON
BUS (Local Operating Network). This
universal, de-centralised network for
automated building control systems not
only allows communication between
Vitotronic control units, but also the
hooking up of on-site systems and
devices of various manufacturers.
It enables, for example, individual room
control units or building management
systems to be directly connected to
Vitotronic control units. Further
modifications, expansions and
maintenance work can be carried out at
any time and with running systems.
47
4.1 Index
4.1 Index
B
P
Boiler control units, 4
Positioning, 5
C
Product information, 3
Chimney diagram, 11
R
Combustion air supply, 6
Requirements of the heating water, 13
Control panels, 4
S
Corrosion on the primary side
(avoidance), 13
Safety temperatures, 7
Safety valve, 8
Cylinder loading system, 40
Sizing, 7
D
Standard efficiency, 3
Delivery, 5
Switching points, 5
Printed on environmentally friendly,
chlorine-free bleached paper.
Design notes, 5
T
E
Thermal safety shut-off valve, 12
Electrical connection, 12
Transportation, 5
F
W
Flow temperatures, 7
Water connection, 7
Flue gas connection, 10
Water quality, 13
Flue gas re-circulation, 11
Flue gas system, 11
G
Gas connection, 12
I
Installation location, 6
Low water indicator, 8
LPG operation in rooms below ground
level, 12
M
Maximum pressure limiter, 8
Minimum pressure limiter, 8
Motorised flue gas damper, connection
47
O
Operating conditions, 3
Operating mode, 7
48
Viessmann Werke GmbH & Co
D-35107 Allendorf
Tel:
(00-49 64 52) 70-0
Fax:
(00-49 64 52) 70-27 80
www.viessmann.de
Viessmann Limited
Hortonwood 32, Telford
Shropshire, TF1 4EU, GB
Tel:
(01952) 670261
Fax:
(01952) 670103
5822 239 GB Subject to technical modifications.
L