Viessmann | GW2 | Technical data | Viessmann GW2 Technical data

Installation and
Service Instructions
Please file in Service Binder
for use by heating contractor
Vitotronic 300, Model GW2
Outdoor-reset logic digital boiler and
heating circuit control unit
VITOTRONIC 300
IMPORTANT
Certified as a component part
of Viessmann boilers only
5285 941 v1.5 05/2012
Read and save these instructions
for future reference.
1
General information
Safety, Installation and Warranty Requirements
Please ensure that this manual is read and understood before commencing installation. Failure to comply with the issues
listed below and details printed in this manual can cause product/property damage, and/or severe personal injury. Ensure all
requirements below are understood and fulfilled (including detailed information found in manual subsections).
Licensed professional heating
contractor
The installation, adjustment, service,
and maintenance of this equipment
must be performed by a licensed
professional heating contractor.
Please see section
entitled “Important
Regulatory and
Installation
Requirements.”
Product documentation
Read all applicable documentation
before commencing installation. Store
documentation near boiler in a readily
accessible location for reference in the
future by service personnel.
Advice to owner
Once the installation work is complete,
the heating contractor must familiarize
the system operator/ultimate owner
with all equipment, as well as safety
precautions/requirements, shut-down
procedure, and the need for
professional service annually before
the heating season begins.
Warranty
Information contained in
this and related product
documentation must be
read and followed. Failure
to do so renders warranty
null and void.
For a listing of
applicable literature,
please see section
entitled “Important
Regulatory and
Installation Requirements.”
Safety Terminology
The following terms are used throughout this manual to bring attention to the presence of potential hazards or important
product information. Please heed the advice given!
DANGER
Indicates an imminently hazardous
situation which, if not avoided, will
result in death, serious injury or
substantial product / property damage.
WARNING
Indicates an imminently hazardous
situation which, if not avoided, could
result in substantial product/property
damage, serious injury or loss of life.
WARNING
Indicates an imminently hazardous
situation which, if not avoided, may
result in minor injury or product /
property damage.
Helpful hints for installation,
operation or maintenance which
pertain to the product.
2
5285 941 v.1.5
IMPORTANT
General information
Product Information
Vitotronic 300, Model GW2
For installation in or mounting on
Viessmann boilers only.
Applicable to the following control
units
Order No. 7134 555, 7143 156, 7511 362 from
Serial No. 7143 000 Order No. 7134 555, 7143 156, 7511 362 from
Serial No. 7187 101 5285 941 v.1.5
Order No. 7134 555, 7143 156, 7511 362 from
Serial No. 7248 248 3
Index
Page
General information
Product information
Heating system types
Installation
..........................................................................
2
.............................................................................
3
Safety Requirements
System types for modulating boilers
...........................................
6
System types for condensing boilers
..........................................
12
..............................................
18
................................................
21
......................................................
22
Overview of electrical connections
Routing and strain relief of cables
Inserting the boiler coding card
Adjustment of the fixed high limit
................................................
Adjustment of the adjustable high limit
.....................................
Connection of the outdoor temperature sensor
......................
23
24
25
Connection of the boiler temperature sensor
and other sensors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Connection of the pumps
.................................................................
30
Connection of boiler return mixing-valve or
modulating valve actuator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Making space for accessory adaptors on the DIN rail
(CM2 only) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Connections to plug aBÖ
..................................................................
Compiled failure alarm indicator
.....................................................
35
36
Connection of external equipment to plug aVD
......................
38
Connection of external equipment to plug aVH
......................
39
Connection of external controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
Connection of combustion air device
..........................................
Connection of low water cut-off device
Burner connection, burner control wiring
45
....................................
49
..................................
51
Power supply connection, boiler control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
..............................
57
...................................................................
59
..........................................................................
63
.........................................................................................................
64
Mounting the front part of the control unit
Opening the control unit
Start-up
Procedure (overview)
5285 941 v.1.5
Steps
4
Index
Page
Scanning service information
Overview of service levels
...............................................................
...................
73
.......................................
77
Temperatures, boiler coding cards and scanning
Scanning operating status information
.........................
78
........................................................................
79
.................................................................................................
80
Scanning and resetting the ”Service” display
Troubleshooting
Troubleshooting steps
Diagnosis
Functional description
72
Boiler temperature control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86
Heating circuit control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87
DHW tank temperature control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90
Additional information
Overview
..................................................................................................
Technical data
.......................................................................................
92
93
...........................................................................
94
Coding 1
..................................................................................................
114
Coding 2
..................................................................................................
116
System components
......................................................................................
135
5285 941 v.1.5
Wiring diagram
5
Heating system types
Heating system types for modulating boilers
System type 1 – Single-boiler system with shunt pump for raising the return temperature
in conjunction with
Vitorond 200, VD2
C
6
20
20
52
52
T2
T1
A*1
plugs
!
Outdoor temperature sensor
? M2 Supply temperature sensor,
mixing valve circuit 2
? M3 Supply temperature sensor,
mixing valve circuit 3
§
Boiler temperature sensor
%
DHW tank temperature sensor
aJA Temperature sensor T1
aJB Temperature sensor T2
sÖ A1 Close mixing valves with
external heating circuit controls
sÖ M2 Heating circuit pump, mixing
valve circuit 2
sÖ M3 Heating circuit pump, mixing
valve circuit 3
the Vitorond the boiler supply and return are at the rear of the boiler.
sA
sK
sL
fÖ
DHW pump
DHW re-circulation pump
Shunt pump
Power supply connection,
120 VAC
fA
Burner (1st stage)
gS M2 Mixing valve motor, mixing
valve circuit 2
gS M3 Mixing valve motor, mixing
valve circuit 3
lÖ
Burner (2nd stage/modulating)
aVD
Connection of external
equipment (see page 38)
aVH
Connection of external
equipment (see page 39)
5285 941 v.1.5
A Boiler with Vitotronic 300
B Domestic hot water tank
C Heating circuit with mixing valve
143
146
41
90
B
*1 On
M3
2
17B
17A
3
40
1
28
21
5
M2
2
M3
2
20
52
29
20
2
20
52
A1 M2
C
Heating system types
Heating system types for modulating boilers
Possible applications
Heating systems with manifold
arranged close to the boiler. The boiler
water flow is required to be reduced.
Please note:
This circuit diagram represents a
recommendation only. It is the
responsibility of the customer and/or
the heating contractor to check that
this recommendation is complete and
fully functional. Three-phase equipment
must be connected via additional
power contactors.
(continued)
When the return temperature falls
below the required minimum value,
the temperature sensor T2 switches
on the shunt pump. If the minimum
return temperature is not reached
despite raising the return temperature,
the flow must be reduced by at least
50% via the temperature sensor T1.
The shunt pump must be sized so that
bypassed water accounts for approx.
30% of the total flow rate of the
boiler.
Temperature sensor T1
Wiring of the temperature sensor
T1 in heating systems with heating
circuit control units which are not
connected via the LON BUS to the
boiler control unit.
Coding required: ”4C : 2” – use
plug sÖ for closing the mixing
valves of the heating circuits
connected downstream.
sÖ A1 Close mixing valves
A
Contactor relay, field supplied
B
Heating circuit controls
connected downstream
Switch contact closed: signal
for ”close mixing valve”.
5285 941 v.1.5
Available system accessories
Vitotrol remote control
Flue gas temperature sensor
Coding of
system type
Change required
Automatic change
00: 1
If no system circuit A1 is connected, set
coding ”00: 3”, ”00: 4”, ”00: 7” or ”00: 8”
(see page 101)
The system type is recognized automatically
when the sensors are connected
02: 1
Set coding ”02: 2” for operation with
modulating burner
03: 0
Set coding ”03: 1” for oil-fired operation
(re-setting is not possible)
4A: 0
––
4b: 0
––
––
––
Connection of the temperature sensor T1 at
plug aJA;
Coding ”4A: 1” is set automatically
Connection of the temperature sensor T2 at
plug aJB;
Coding ”4b: 1” is set automatically
7
Heating system types
Circuit Diagram 1
Single-boiler system with Therm-Control and three-way mixing valve
in conjunction with Vitorond 200, VD2A
A Heating circuit with mixing valves
B DHW tank
?M3
§
%
aJA
fÖ
Outdoor temperature sensor
Flow temperature sensor,
mixing valve
Flow temperature sensor,
mixing valve
Boiler water temperature
sensor
DHW tank temperature sensor
Therm-Control temperature
sensor
sÖM2
sÖM3
sÖA1
sA
sK
Heating circuit pump, mixing
valve
Heating circuit pump, mixing
valve
Closing the mixing valves with
external heating circuit control
units
DHW primary pump
DHW circulation pump
Power supply, 120 VAC
60 Hz
Install the main isolator in
accordance with regulations
fA
Burner (stage 1)
gSM2
Mixing valve motor
gSM3
Mixing valve motor
lÖ
Burner
(burner stage 2 / mod.)
aVD/aVH External connections
Please refer to the control
manual Vitocontrol-S,
VD2/CT3.
8
5285 941 v1.5
Plug
!
?M2
Heating system types
Circuit Diagram 1
(continued)
Wiring diagram
Wiring of the Therm-Control in heating
systems with heating circuit control units
are not connected to the boiler control
unit via the LON.
Required coding:
Change “4C” to “2” - use the plug-in
connector 20 A1 to close the
downstream mixing valve. Change “0D”
to “1” - the Therm-Control acts on the
mixing valve of the downstream heating
circuits (for Vitotronic 200 and 300,
delivered condition).
5285 941 v1.5
sÖ A1 Close mixing valves
A
Contactor relay, field supplied
B
Heating circuit controls
connected downstream
Switch contact closed: signal
for ”close mixing valve”.
9
Heating system types
Heating system types for modulating boilers
(continued)
System type 2 – Single-boiler system with shunt pump and return valve for raising the return temperature
in conjunction with
Vitorond 200, VD2
M3
A1
2
20
52
52
1
28
21
5
143
146
M2
2
M3
2
20
20
52
52
T2
T1
*1
A
plugs
!
Outdoor temperature sensor
? M2 Supply temperature sensor,
mixing valve circuit 2
? M3 Supply temperature sensor,
mixing valve circuit 3
§
Boiler temperature sensor
%
DHW tank temperature sensor
aJA Temperature sensor T1
aJB Temperature sensor T2
sÖ M2 Heating circuit pump, mixing
valve circuit 2
sÖ M3 Heating circuit pump, mixing
valve circuit 3
sA
Circulation pump for heating
the DHW tank
the Vitorond the boiler supply and return are at the rear of the boiler.
sK
sL
fÖ
DHW re-circulation pump
Shunt pump
Power supply connection,
120 VAC
fA
Burner (1st stage)
gS A1 Mixing valve motor for raising
the return temperature
gS M2 Mixing valve motor, mixing
valve circuit 2
gS M3 Mixing valve motor, mixing
valve circuit 3
lÖ
Burner (2nd stage/modulating)
aVD
Connection of external
equipment (see page 38)
aVH
Connection of external
equipment (see page 39)
5285 941 v.1.5
41
90
40
A Boiler with Vitotronic 300
B Domestic hot water tank
C Heating circuit with mixing valve
10
C
17B
17A
3
B
*1 On
29
M2
2
20
52
C
Heating system types
Heating system types for modulating boilers
Possible applications
Heating systems with distributor
arranged close to the boiler. The boiler
water flow is required to be reduced.
Please note:
This circuit diagram represents a
recommendation only. It is the
responsibility of the customer and/or
the heating contractor to check that
this recommendation is complete and
fully functional. Three-phase equipment
must be connected via additional
power contactors.
(continued)
When the return temperature falls
below the required minimum value,
the temperature sensor T2 switches
on the shunt pump. If, as a result,
the required minimum return
temperature is not reached, the
return valve is proportionally closed
via the temperature sensor T1 and
the minimum return temperature is
assured.
The shunt pump must be sized so that
bypassed water accounts for approx.
30% of the total flow rate of the
boiler.
Available system accessories
Vitotrol remote control
Flue gas temperature sensor
Coding
system type
Change required
Automatic change
00: 1
If no system circuit A1 is connected, set
coding ”00: 3”, ”00: 4”, ”00: 7” or ”00: 8”
(see page 114)
The system type is recognized automatically
when the sensors are connected
02: 1
Set coding ”02: 2” for operation with
modulating burner
03: 0
Set coding ”03: 1” for oil-fired operation
(re-setting is not possible)
0C: 0
Set coding ”0C: 1” for continuous return
temperature control
––
4b: 0
––
––
––
Connection of the temperature sensor T1 at
plug aJA;
Coding ”4A: 1” is set automatically
Connection of the temperature sensor T2 at
plug aJB;
Coding ”4b: 1” is set automatically
5285 941 v.1.5
4A: 0
––
11
Heating system types
Heating system types for condensing boilers
System type 3 – Single-boiler system with Vitocrossal 300
A1
M2
M3
20
2
20
52
2
20
52
C
1
28
21
5
C
M2
2
M3
2
20
20
52
52
B
D
A
plugs
!
Outdoor temperature sensor
? M2 Supply temperature sensor,
mixing valve circuit 2
? M3 Supply temperature sensor,
mixing valve circuit 3
§
Boiler temperature sensor
%
DHW tank temperature sensor
sÖ A1 Heating circuit without mixing
valve (if installed)
sÖ M2 Heating circuit pump, mixing
valve circuit 2
sÖ M3 Heating circuit pump, mixing
valve circuit 3
sA
Circulation pump for heating
the DHW tank
sK
DHW re-circulation pump
fÖ
Power supply connection,
120 VAC
fA
Burner (1st stage)
gS M2 Mixing valve motor, mixing
valve circuit 2
gS M3 Mixing valve motor, mixing
valve circuit 3
lÖ
Burner (2nd stage/modulating)
aVD
Connection of external
equipment (see page 38)
aVH
Connection of external
equipment (see page 39)
5285 941 v.1.5
A Boiler with Vitotronic 300
B Domestic hot water tank
C Heating circuit with mixing valve
D Neutralizing unit
143
146
41
90
40
3
12
Heating system types
Heating system types for condensing boilers
Please note:
This circuit diagram represents a
recommendation only. It is the
responsibility of the customer and/or
the heating contractor to check that
this recommendation is complete and
fully functional. Three-phase equipment
must be connected via additional
power contactors.
(continued)
The Vitocrossal 300 is operated with
modulating boiler water temperature
by means of the outdoor re-set boiler
control unit. Viessmann modulating
burner is operated through Vitotronic
control.
The boiler water temperature which
is established in the heating mode is
higher than the maximum heating
circuit supply temperature by an
adjustable difference.
Available system accessories
Vitotrol remote control
Flue gas temperature sensor
Change required
Automatic change
00: 1
If no system circuit A1 is connected, set
coding ”00: 3”, ”00: 4”, ”00: 7” or ”00: 8”
(see page 114)
The system type is recognized automatically
when the sensors are connected
02: 1
Set coding ”02: 2” for operation with
modulating burner
––
0d: 1
Set coding ”0d: 0”
––
5285 941 v.1.5
Coding
system type
13
Heating system types
Heating system types for condensing boilers
(continued)
System type 4 - Single-boiler system with Vitocrossal 300 with several heating circuits and one modulating supply
temperature heating circuit
C
D
M2
2
M3
2
20
20
52
52
E
M3
2
F
20
M3
2
20
52
2
20
52
143
146
41
90
G
A Boiler with Vitotronic 300
B Domestic hot water tank
C Heating circuit with mixing valve
D Modulating supply temperature
heating circuit
or
E Underfloor heating circuit
F High limit thermostat (max. limit)
G Neutralizing unit
14
or
3
A
plugs
!
Outdoor temperature sensor
? M2 Supply temperature sensor,
mixing valve circuit 2
? M3 Supply temperature sensor,
mixing valve circuit 3
§
Boiler temperature sensor
%
DHW tank temperature sensor
sÖ A1 Heating circuit without mixing
valve (if installed)
sÖ M2 Heating circuit pump, mixing
valve circuit 2
sÖ M3 Heating circuit pump, mixing
valve circuit 3
sA
Circulation pump for heating
the DHW tank
sK
DHW re-circulation pump
fÖ
Power supply connection
120 VAC
fA
Burner (1st stage)
gS M2 Mixing valve motor, mixing
valve circuit 2
gS M3 Mixing valve motor, mixing
valve circuit 3
lÖ
Burner (2nd stage/modulating)
aVD
Connection of external
equipment (see page 38)
aVH
Connection of external
equipment (see page 39)
5285 941 v.1.5
B
M2
40
1
28
21
5
A1
20
52
Heating system types
Heating system types for condensing boilers
Possible applications
For heating circuits with different
temperatures.
Please note:
This circuit diagram represents a
recommendation only. It is the
responsibility of the customer and/or
the heating contractor to check that
this recommendation is complete and
fully functional. Three-phase equipment
must be connected via additional
power contactors.
(continued)
The Vitocrossal 300 is operated with
modulating boiler water temperature
by means of the outdoor re-set boiler
control unit. Two-stage or modulating
burners can be controlled.
Pumps in the underfloor heating
circuit
20
20
The Vitocrossal 300 has two return
connections. The heating circuits with
the higher return temperature are
connected to the return connection
at the top, those with the lower
temperatures to the return connection
at the bottom. Please note: At least
15% of the take-off from the rated
output must be connected to the
return connection at the bottom.
The boiler water temperature which
is established in the heating mode is
higher than the maximum heating
circuit supply temperature by an
adjustable difference.
N
L
A
B
C
sÖ Heating circuit control unit
A Primary pump of underfloor
heating circuit
B High limit thermostat (max. limit)
C Secondary pump of underfloor
heating circuit (after system
separation)
Change required
Automatic change
00: 1
If no system circuit A1 is connected, set
coding ”00: 3”, ”00: 4”, ”00: 7” or ”00: 8”
(see page 114)
The system type is recognized automatically
when the sensors are connected
02: 1
Set coding ”02: 2” for operation with
modulating burner
––
0d: 1
Set coding ”0d: 0”
––
5285 941 v.1.5
Coding
system type
15
Heating system types
Heating system types for condensing boilers
System type 5 – Single-boiler system with Vitocrossal 200
plugs
!
Outdoor temperature sensor
? M2 Supply temperature sensor,
mixing valve circuit 2
? M3 Supply temperature sensor,
mixing valve circuit 3
§
Boiler temperature sensor
%
DHW tank temperature sensor
sÖ A1 Heating circuit without mixing
valve (if installed)
sÖ M2 Heating circuit pump, mixing
valve circuit 2
sÖ M3 Heating circuit pump, mixing
valve circuit 3
sA
Circulation pump for heating
the DHW tank
sK
DHW re-circulation pump
fÖ
Power supply connection,
120 VAC
fA
Burner (1st stage)
gS M2 Mixing valve motor, mixing
valve circuit 2
gS M3 Mixing valve motor, mixing
valve circuit 3
lÖ
Burner (2nd stage/modulating)
aVD
Connection of external
equipment (see page 38)
aVH
Connection of external
equipment (see page 39)
5285 941 v.1.5
A Boiler with Vitotronic 300
B Domestic hot water tank
C Heating circuit with mixing valve
D Neutralizing unit
16
Heating system types
Heating system types for condensing boilers
Please note:
This circuit diagram represents a
recommendation only. It is the
responsibility of the customer and/or
the heating contractor to check that
this recommendation is complete and
fully functional. Three-phase equipment
must be connected via additional
power contactors.
(continued)
The Vitocrossal 200 is operated with
modulating boiler water temperature
by means of the outdoor re-set boiler
control unit. Viessmann modulating
burner is operated through Vitotronic
control.
The boiler water temperature which
is established in the heating mode is
higher than the maximum heating
circuit supply temperature by an
adjustable difference.
Available system accessories
Vitotrol remote control
Change required
Automatic change
00: 1
If no system circuit A1 is connected, set
coding ”00: 3”, ”00: 4”, ”00: 7” or ”00: 8”
(see page 114)
The system type is recognized automatically
when the sensors are connected
02: 1
Set coding ”02: 2” for operation with
modulating burner
––
0d: 1
Set coding ”0d: 0”
––
5285 941 v.1.5
Coding
system type
17
Installation
Overview of electrical connections
M3
M2
M3
M2
M3
M2
145
145
1
17 B
17 A
5
3/2
15
143
146
Mixing valve extension circuit board
? M2/M3 Supply temperature sensor
sÖ M2/M3 Heating circuit pump
gS M2/M3 Mixing valve motor
18
151
28
21
52 A1
20 A1
29
50
40
156
156
90
41
150
Low-voltage motherboard
!
Outdoor temperature sensor
(ATS)
§
Boiler temperature sensor (BTS)
%
DHW tank temperature sensor
(STS)
aG
Flue gas temperature sensor
(AGS) (accessory)
aJA Therm-Control temperature
sensor
or
return temperature sensor T1
(RLS) (accessory)
aJB Return temperature sensor T2
(RLS) (accessory)
aVD Connection of external
equipment
aVG KM BUS participant, e.g.
Vitotrol remote control
(accessory)
aVH Connection of external
equipment
Line voltage motherboard
sÖ A1 Heating circuit pump or
control output
sA
Circulation pump for heating
the DHW tank (accessory)
sK
DHW re-circulation pump
(provided by customer)
sL
Shunt pump
fÖ
Power supply connection
fA
Burner (1st stage)
gÖ
Central fault indicator
gSA1 Continuous return
temperature control
or
3-way mixing valve for DHW
tank loading system
lÖ
Burner (2nd stage/modulating)
aBÖ Connection of external
equipment, e.g. additional
safety equipment
aBA Safety circuit, potential free
aBH Power supply connection for
accessories
5285 941 v.1.5
52
52
20
20
2
2
Installation
5285 941 v.1.5
Overview of electrical connections(for VD2/VD2A/CT3 only)
19
Installation
5285 941 v.1.5
Overview of electrical connections (for CM2 only)
20
Installation
Routing and strain relief of cables
1. Run the cables from the connection enclosure into the control unit.
2. Apply strain relief to cables (see below).
Cables with moulded strain relief
clamp
Connect cable and strain relief
clamp.
OR
5285 941 v.1.5
Fasten cable to the cable lead with
cable tie.
21
Installation
Inserting the boiler coding card
CAUTION
For matching the operation of the
control unit to the boiler, only the
boiler coding card which is supplied
as part of the standard delivery of
the boiler may be used.
Only use the boiler coding card included with the boiler.
Boiler
Coding card
Part No.
Vitocrossal 300, type CT3
1040
7820 144
Vitorond 200, VD2 / VD2A
1020
7820 142
Vitocrossal 200 CM2
1041
7820 145
5285 941 v.1.5
1. Push the boiler coding card
through the recess in the cover
and insert it in plug-in location
”X7”.
22
Installation
Adjustment of the fixed high limit (if required)
The fixed high limit is supplied with a factory setting of 110°C / 230°F.
A
Adjustment to 99°C / 210°F
¨ Disconnect power to control
and burner!
1. Unclip the fuse box and swing
upwards.
2. Turn the slotted screw on the
rear of the fixed high limit until
the slot points to 99°C / 210°F
(once adjusted, the fixed high limit
cannot be reset to 110°C/ 230°F).
3.
3. Re-fit the fuse box.
WARNING
If adjusted to 99°C / 210°F, do
not set the adjustable high limit
above 75°C / 167°F.
Please note:
Adjustment is required for the
Vitocrossal 300.
1.
See Service Instructions
for Vitocrossal 300.
2.
Non-condensing boiler
(VD2/VD2A) °C / °F
Condensing boiler
(CT3) °C / °F
Condensing boiler
(CM2) °C / °F
Fixed high limit
110 / 230
99 / 210
99 / 210
99 / 210
Adjustable high limit
100 / 212
95 / 203
95 / 203
95 / 203
93 / 200
87 / 188
87 / 188
88 / 190
5285 941 v.1.5
Coding for the electronic maximum
temperature limiter of Vitotronic 100;
set code 06 to the temperature as
shown or less
23
Installation
Adjustment of the adjustable high limit (if required)
The adjustable high limit is supplied with a factory setting of 95°C.
Adjustment to 100°C / 212°F
A
1. Using a suitable screwdriver,
lever out and remove the
selector knob ”R” behind the
hinged cover.
3.
2.
2. Using a pair of pointed pliers,
break off the cams identified by
the shaded areas in the Fig.
from the stop dial.
A
75 to 100°C
167 to 212°F
3. Fit the selector knob ”R” so
that the marking is in the centre
of the selected range.
Please note:
Note the setting of coding address
”06”!
WARNING
If the system is operated in
conjunction with a domestic hot
water tank, ensure that the
maximum permissible domestic
hot water temperature is not
exceeded. If necessary, install a
suitable safety device for this
purpose.
5285 941 v.1.5
1.
24
Installation
Connection of the outdoor temperature sensor
The outdoor temperature sensor should be mounted 2 to 2.5 metres / 6.5 to
8 ft above ground level on the north or north-west facing wall of the building.
In the case of multi-storey buildings, it should be mounted in the upper half of
the second storey.
Make sure that the sensor is not located over windows, doors and air vents,
nor immediately beneath a balcony or guttering.
Do not paint over the outdoor temperature sensor housing.
1. Remove the cap.
2. Mount the bottom part of the
sensor housing.
3. Pull the sensor wire through the
opening in the terminal
compartment and through the
strain relief provided.
5.
1.
3.
4. Connect the wires to the
terminals.
5. Place the cap over the outdoor
temperature sensor.
4.
WARNING
2.
When extending wire, there is the
possibility of exposure to
electromagnetic interference. Avoid
running wires beside or near high
voltage 120/240 VAC conductors.
If proximity to high voltage
conductors cannot be avoided, use
stranded, twisted pair or shield design
wire. Ensure that only one end of the
shielding is grounded.
600
580
560
540
520
500
480
5285 941 v.1.5
Resistance in
460
440
420
400
-40
-40
-30
-22
-20
-4
-10
14
0
32
10
50
20
68
30
86
Outdoor temperature sensor °C / °F
25
Installation
Connection of the boiler temperature sensor
The sensor measures the boiler
water temperature.
The boiler temperature sensor is
installed at the same time as the
boiler insulation.
3
Check the sensor
1. Disconnect plug § in the
terminal compartment of the
boiler control.
2. Measure resistance of sensor
at terminals ”1” and ”2” of the
plug.
Resistance
in Ω
40 / 104
50 / 122
60 / 140
578
597
616
3. Compare the value measured
with the current temperature.
If the value differs significantly,
check installation and, if
necessary, replace sensor.
760
740
Technical data
Degree of protection: IP 32
Ambient temperature
During operation:
0 to + 130°C
32 to + 266°F
During storage and transport:
-20 to + 70°C
-4 to + 158°F
720
700
680
660
Resistance in
Boiler water
temperature
in °C / °F
640
Electrical connection
The sensors are ready to plug in.
Insert the boiler temperature
sensor in socket ”3” of the boiler
control.
620
600
580
400
540
26
0
32
20
68
40
104
60
141
80
176
Boiler temperature in °C / °F
100
212
120
248
140
284
5285 941 v.1.5
560
Installation
Connection of the DHW tank temperature sensor
The sensor measures the domestic hot
water tank temperature.
Heating systems with domestic hot
water heating (single-boiler systems
only)
1. Install the DHW tank temperature
sensor.
5
See Installation
Instructions for domestic
hot water tank.
Please note:
When installing the sensor in DHW
tanks of other makes, make sure
that the sensor is pressed against
the sensor well of the DHW tank
by means of a suitable device.
2. Ensure that the maximum
permissible domestic hot water
temperature is not exceeded. If
necessary, install a suitable safety
device for this purpose.
Heating systems without domestic
hot water heating
Do not connect the DHW tank
temperature sensor.
sensor and tank
temperature sensor
720
Check the sensor
1. Disconnect plug % in the
terminal compartment of the
boiler control.
2. Measure resistance of sensor
at terminals ”1” and ”2” of the
plug.
DHW tank
temperature
in °C / °F
Resistance
in Ω
40 / 104
50 / 122
60 / 140
578
597
616
3. Compare the value measured
with the current temperature.
If the value differs significantly,
check installation and, if
necessary, replace sensor.
Technical data
Degree of protection: IP 32
Ambient temperature
During operation:
0 to + 90 °C
32 to + 194 °F
During storage and transport:
-20 to + 70 °C
-4 to + 158 °F
700
Electrical connection
The sensors are ready to plug in.
Insert the DHW temperature
sensor in socket ”5” of the boiler
control.
680
Resistance in
660
640
620
600
580
5285 941 v.1.5
560
540
0
32
20
68
40
104
60
140
80
176
100
212
DHW tank temperature in ºC / ºF
27
Installation
Connection of the return temperature sensor
Strap-on temperature sensor and immersion temperature sensor
For measuring the boiler return
temperature.
Electrical connection
The sensor is inserted in socket
”17A” or ”17B” on the boiler
control.
17A or 17B
Check the sensor
1. Disconnect plug aJA or aJB
in the terminal compartment of
the boiler control.
17A or 17B
2. Measure resistance of sensor
at terminals ”1” and ”2” of the
plug.
Resistance
in Ω
30 / 86
40 / 104
60 / 140
569
592
643
3. Compare the value measured
with the current temperature. If
the value differs significantly,
check installation and, if
necessary, replace sensor.
740
720
700
Technical data
Degree of protection: IP 32
Ambient temperature
During operation:
0 to + 100°C
32 to + 212°F
During storage and transport:
-20 to + 70°C
-4 to + 158°F
680
660
Resistance in
Return
temperature
in °C / °F
640
620
600
580
540
20
68
28
30
86
40
104
50
122
60
70
140 158
Return temperature in °C / °F
80
176
90
100
194 212
5285 941 v.1.5
560
Installation
Connection of the flue gas temperature sensor (VD2/VD2A/CT3 only)
The sensor measures the flue gas
temperature and monitors the
selected limit value.
Electrical connection
The sensor is inserted in socket
”15” on the boiler control.
Check flue gas temperature sensor
1. Disconnect plug aG in the
terminal compartment .
2. Measure resistance of sensor
at terminals ”1” and ”2” of the
plug.
1020
980
Flue gas
temperature
in °C / °F
Resistance
in Ω
180 / 176
160 / 320
200 / 392
650
800
880
3. Compare the value measured
with the actual temperature If
the value differs significantly,
check installation and, if
necessary, replace sensor.
940
900
860
Technical data
Degree of
protection: IP 60
Ambient temperature
During operation:
0 to + 600°C
32 to + 1112°F
During storage and transport:
-20 to + 70°C
-4 to + 158°F
Resistance in Ω
820
780
740
700
660
620
580
540
5285 941 v.1.5
500
0
32
40
80 120 160 200 240
104 176 248 360 392 464
280
536
Flue gas temperature in °C / °F
29
Installation
Connection of the Pumps (VD2/VD2A/CT3 only)
Available pump connections
sÖ
A1/M1Heating circuit high
temperature (without mixing valve)
Terminals 5 - L, - G , - N
sA
Circulation pump for heating
up the domestic hot water tank Terminals 4 - L, - G , - N
sL
Shunt pump, boiler circuit pump
Terminals 6 - L, - G, - N.
sK
DHW recirculattion pump
terminals 3 - L, - G, - N
sÖM2 M2 Heating circuit high
temperature (with mixing valve)
Terminals 2 - L, - G , - N
120 VAC pumps
240 VAC or 3 PH pumps
Note:
The maximum power consumption of
all pumps is 4A .
Rated current: max. 2 FLA
Recommended connection
cable: AWG 14
Please note:
Use contactor and/or motor starter to
power pump.
For activating the contactor:
Rated current: max. 2 FLA
Recommended connection
wire size: AWG 14
Use contactor for pumps with higher
current rating
Connect the 3-wire cable from the
pump to the corresponding terminals.
Please ensure that all connections and
wire sizes comply with local and
national codes.
1.Select the contactor and the
connecting wire in accordance with
the rating of the pump that is to be
connected.
sÖM3 M3 Heating circuit high
Install pumps: see
manufacturer’s
instructions.
30
2.Connect pump and power supply to
the contactor.
3.Connect contactor coil to the
corresponding terminals.
5285 941 v1.5
temperature (with mixing valve)
Terminals 1 - L, - G , - N
Installation
Connection of the Pumps (CM2 only)
Available pump connections
sÖ
A1/M1Heating circuit high
temperature (without mixing valve)
Terminals 7 - L, - G , - N
sA
Circulation pump for heating
up the domestic hot water tank Terminals 6 - L, - G , - N
sL
Shunt pump, boiler circuit pump
Terminals 8 - L, - G, - N.
sK
DHW recirculattion pump
terminals 5 - L, - G, - N
sÖM2 M2 Heating circuit high
temperature (with mixing valve)
Terminals 4 - L, - G , - N
120 VAC pumps
240 VAC or 3 PH pumps
Note:
The maximum power consumption of
all pumps is 4A .
Rated current: max. 2 FLA
Recommended connection
cable: AWG 14
Please note:
Use contactor and/or motor starter to
power pump.
For activating the contactor:
Rated current: max. 2 FLA
Recommended connection
wire size: AWG 14
Use contactor for pumps with higher
current rating
Connect the 3-wire cable from the
pump to the corresponding terminals.
Please ensure that all connections and
wire sizes comply with local and
national codes.
1.Select the contactor and the
connecting wire in accordance with
the rating of the pump that is to be
connected.
sÖM3 M3 Heating circuit high
5285 941 v1.5
temperature (with mixing valve)
Terminals 3 - L, - G , - N
Install pumps: see
manufacturer’s
instructions.
2.Connect pump and power supply to
the contactor.
3.Connect contactor coil to the
corresponding terminals.
31
Installation
Connection of boiler return mixing valve or modulating valve actuator
(VD2/VD2A/CT3 only)
1 120V or 24V valve adaptor
1 120V valve adaptor
1 24V valve adaptor
2 DIN rail in connection enclosure
2 120V valve actuator
2 24V valve actuator
3 aBH Terminals
120V valve adaptor
Rated voltage: 120 VAC
Rated current: max. 0.1 FLA
Recommended connection
wire size: AWG 14
Part No.: 7134 560
24V valve adaptor
Rated voltage: 24 VAC
Rated current: max. 0.15 FLA
Recommended connection
wire size: AWG 14
Part No.: 7134 559
Operating time:
5 to 199 sec. selected via coding
address “40”.
1. Disconnect power to control.
2. Install 120V or 24V valve
adaptor on DIN rail inside
connection enclosure.
3. Insert the plug gS into socket
gS on the control.
4. Fasten cable with tie.
(see page 21).
5. Connect black wire of the
adaptor to connection aBH on
the DIN rail.
- Terminal 8,9 or 10.
5285 941 v.1.5
6. Connect valve actuator wires to
the adaptor terminals as shown
in figures.
32
Installation
Connection of Boiler Return Mixing Valve or Isolation/Modulating Valve
actuator
(CM2
only)
10 11 12
1 120V or 24V Valve Adaptor
1 120V Valve Adaptor
1 24V Valve Adaptor
2 Junction box
2 120V valve actuator
2 24V valve actuator
3 120V L out power supply
120V Valve Adaptor
Rated voltage: 120 VAC
Rated current: max. 0.1 FLA
Recommended connection
wire size: AWG 14
Part No. 7511367
24V Valve Adaptor
Rated voltage: 24 VAC
Rated current: max. 0.15 FLA
Recommended connection
wire size: AWG 14
Part No. 7511366
Operating time:
5 to 199 sec. selected via coding
address “40”.
1. Disconnect power to control.
2. Install 120V or 24V Valve
Adaptor on DIN rail inside
connection enclosure.
3. Insert the plug gS into socket
gS on the control.
4. Fasten cable with tie
(see page.21).
5. Connect black wire of the
adaptor to connection 120V L
out the DIN rail
- Terminals 10,11 or 12.
5285 941 v1.5
6. Connect valve actuator wires
to the adaptor terminals as
shown on figures.
33
Installation
Making Space for Accessory Adaptors on the DIN Rail (CM2 only)
1. Push up on the bottom front of
the DIN rail clamp to remove and
set aside.
2. Using a flat head screwdriver,
remove the 4 ’spare’ DIN
terminals 23, 24, 25 and 26 one
at a time. Place the screwdriver
between the rail and the base of
the terminal and turn the
screwdriver clockwise . Discard
the removed terminals.
3. Re-install the DIN rail clamp by
hooking the latch of the clamp
around the top of the rail and then
push down on the front of the
clamp.
5285 941 v1.5
Note: See separate Installation
Instructions for accessory
adaptors.
34
Installation
Connections to terminal aBÖ (VD2/VD2A/CT3 only)
External shut-off
1. Remove jumper between
terminals 16 and 17.
2. Connect dry contact.
Controlled switch-off takes
place when the contact is
opened.
WARNING
The terminals should be used for
safety switch-off purposes only
(e.g. through a high limit thermostat).
Start at page 52 for details of
controlled switch-off.
During switch-off, there is no frost
protection of the heating system
and the boiler is not kept at the
minimum boiler water temperature.
Emergency operation
Move jumper from terminals 16
and 17 to terminals 17 and 18.
5285 941 v.1.5
A Jumper
B External shut-off (dry contact)
35
Installation
Connection of the compiled failure alarm indicator (VD2/VD2A/CT3 only)
A
Rated voltage: 120 VAC 60 Hz
Rated current: max. 2 FLA
Recommended connection
wire size:
AWG 14
1. Disconnect power to control
and burner.
2. Connect the compiled failure
alarm as shown in the diagram.
A Connect terminal strip in
connection enclosure of boiler
control.
B Visual ond/or audible alarm
device (120 VAC).
5285 941 v.1.5
B
36
Installation
Connection of the compiled failure alarm indicator (CM2 only)
9
A
Rated voltage: 120 VAC 60 Hz
Rated current: max. 2 FLA
Recommended connection
wire size:
AWG 14
1. Disconnect power to control
and burner.
2. Connect the compiled failure
alarm as shown in the diagram.
A Connect terminal strip in
connection enclosure of boiler
control.
B Visual ond/or audible alarm
device (120 VAC).
5285 941 v.1.5
B
37
Installation
Connection of external equipment to terminal aVD
External changeover of the heating
program/”Open mixing valves”
A
Connect floating contact to terminals
”1” and ”2”.
The manually preselected heating
program can be changed over (see
table) and the mixing valves opened
via the contact.
B
Via coding address ”9A” the function
”Open mixing valves” and via coding
address ”91” the changeover of the
heating program can be assigned to
the heating circuits.
143
External disable/”Close mixing valves”
Connect floating contact to terminals
”2” and ”3”.
A External changeover of the heating program/
”Open mixing valves” externally (floating contact)
B External disable/”Close mixing valves” externally
(floating contact)
Controlled switch-off of the burner
takes place or the mixing valves are
closed when the floating contact is
closed.
The shunt pump is switched off.
Please note:
During controlled switch-off or
”Close mixing valves”, there is no
frost protection of the boiler or
heating circuits and no minimum
boiler water temperature is
maintained.
Coding address ”99” can be used to
select the equipment for which the
input aVD is to be effective.
Manually preselected heating program
(with contact open)
Coding 2
9
or
w
d5: 0
(factory default)
d5: 1
Space heating OFF/DHW OFF
Space heating ON/DHW ON
or
<–>
<–>
Continuous operation with reduced room
temperature/DHW OFF
Continuous operation with normal room
temperature/DHW according to coding
address ”64”
Space heating ON/DHW ON
5285 941 v.1.5
rw
Heating program after changeover
(with contact closed)
38
Installation
Connection of external equipment to plug aVH
External demand
B
A
Connect floating contact to
terminals ”2” and ”3”.
The burner of the boiler is switched
in on a load-dependent basis when
the floating contact is closed.
The boiler water temperature is
limited by the preset max. boiler
water temperature or by the value
set on the mechanical adjustable
high limit.
The required boiler set-point value is
set via the coding address ”9b”.
146
A External demand (floating contact)
B External changeover,
staged/modulating burner
(floating contact)
External changeover between
staged/modulating burner
Connect floating contact to
terminals ”1” and ”2”.
Contact open:
modulating
operation
Contact closed: two-stage
operation
The burner type must be set to
”modulating” in coding 1
(coding ”02: 2”).
5285 941 v.1.5
Please note:
When the burner type is scanned,
”modulating” continues to be
displayed after external changeover
(the display is not changed).
39
Installation
Connection of external controls
Operation with two-stage burner
Settings on the control unit
The settings for the fixed high limit and
the other settings are dependent on the
safety equipment installed in
accordance with applicable codes.
Non-condensing boiler
(VD2/VD2A) °C / °F
Condensing boiler
(CT3) °C / °F
Condensing boiler
(CM2) °C / °F
Fixed high limit
110 / 230
99 / 210
99 / 210
99 / 210
Adjustable high limit
100 / 212
95 / 203
95 / 203
95 / 203
93 / 200
87 / 188
87 / 188
88 / 190
Coding for the electronic maximum
temperature limiter of Vitotronic 100;
set code 06 to the temperature as
shown or less
Single-boiler systems:
Coding ”01: 1”
(factory setting)
Multi-boiler systems:
Set coding ”01: 3”
When a building automation system is
connected, only the connections on
plug aVD are required. The DHW tank
control unit is activated when the DHW
tank temperature sensor is connected.
The boiler water temperature must be
set to the minimum value.
When a building automation system
is connected, the connections on
plugs aVD and aVH are required.
The DHW tank temperature and the
load-dependent cascade control must
be controlled through the building
automation system.
CAUTION
5285 941 v.1.5
The boiler activation contact is
essential on multi-boiler systems.
The contact on the lead boiler MUST
be constantly closed.
40
Installation
Connection of external controls (VD2/VD2A only)
(continued)
Modulating boilers – operation with external modulation controller
1st stage burner fA from Vitotronic.
Plug lÖ from Vitotronic via
modulation controller (BAS).
On the bulding automation unit with
modulation controller set the
minimum temperatures 5°C / 9°F
above the minimum boiler water
temperature of the boiler.
Boiler activation, isolation valve
open or closed
Connect dry contact at terminals
”2” and ”3” of the plug aVH.
Contact closed:
First, the preheat function for followup boilers is activated (coding
address ”2b”).
When the preheat function finishes,
the minimum temperature is
maintained for the boiler, and the
burner stages/modulation can be
switched externally.
The boiler water temperature is
limited by the preset maximum
boiler water temperature or via the
mechanical adjustable high limit.
The setpoint value is selected via
the coding address ”9b”.
Contact open:
The isolation valve is closed after
approx. 5 minutes (coding address
”2C”).
External override of the burner
stages is not possible, and no
minimum temperature is maintained.
Switch on 1st stage burner (basic
load)
Connect dry contact at terminals ”1”
and ”2” of the plug aVD.
5285 941 v.1.5
Contact closed:
The 1st stage burner is switched on.
The full load is only switched on to
maintain the minimum temperature
(not with Vitocrossal 300). The
boiler water temperature is limited
by the electronic maximum
temperature limit (coding address
”06”) if this is set below the value
preset on the mechanical adjustable
high limit ”R”.
Contact open:
The 1st stage burner is switched
off.
41
Installation
Connection of external controls (VD2/VD2A only)
(continued)
Modulating boilers – operation with external modulation controller (continued)
Settings on the control unit
The settings for the fixed high limit and
the other settings are dependent on the
safety equipment installed in
accordance with applicable codes.
Non-condensing boiler
(VD2/VD2A) °C / °F
Condensing boiler
(CT3) °C / °F
Condensing boiler
(CM2) °C / °F
Fixed high limit
110 / 230
99 / 210
99 / 210
99 / 210
Adjustable high limit
100 / 212
95 / 203
95 / 203
95 / 203
93 / 200
87 / 188
87 / 188
88 / 190
Coding for the electronic maximum
temperature limiter of Vitotronic 100;
set code 06 to the temperature as
shown or less
Single-boiler systems:
Coding ”01: 1”
(factory setting)
Multi-boiler systems:
Set coding ”01: 3”
When a building automation system is
connected, only the connections on
plug aVD are required. The DHW tank
control unit is activated when the DHW
tank temperature sensor is connected.
The boiler water temperature must be
set to the minimum value.
When a building automation
system is connected, the
connections on plugs aVD and
aVH are required.
The DHW tank temperature and
the load-dependent cascade control
must be controlled through the
external building automation
system.
CAUTION
5285 941 v.1.5
The boiler activation contact is
essential on multi-boiler systems.
The contact on the lead boiler
MUST be constantly closed.
42
Installation
Connection of external controls (CT3 only) (continued)
Vitocrossal 300 – operation with external modulation controller
1st stage burner fA from
Vitotronic 100.
Connection lÖ from Vitotronic has
no function.
Connection lÖ from building
automation system to the burner.
1st stage burner activated by the
modulation controller via connection
aVH.
Boiler activation, isolation valve
open or closed
Connect dry contact at terminals
”2” and ”3” of the plug aVH.
Contact closed:
First, the preheat function for
follow-up boilers is activated
(coding address ”2b”).
When the preheat function finishes,
the burner stages/modulation can
be switched externally.
The boiler water temperature is
limited by the preset maximum
boiler water temperature or via the
mechanical adjustable high limit.
The setpoint value is selected via
the coding address ”9b”.
Contact open:
The isolation valve is closed after
approx. 5 minutes (coding address
”2C”).
External override of the burner
stages is not possible, and no
minimum temperature is maintained.
Switch on 1st stage burner (basic
load)
Connect dry contact at terminals
”1” and ”2” of the plug aVD.
Contact closed:
The 1st stage burner is switched on.
The boiler water temperature is
limited by the electronic maximum
temperature limit (coding address
”06”) if this is set below the value
preset on the mechanical adjustable
high limit ”R”.
5285 941 v.1.5
Contact open:
The 1st stage burner is switched off.
43
Installation
Connection of external controls (CT3 only) (continued)
Vitocrossal 300 – operation with external modulation controller (continued)
Settings on the control unit
The settings for the fixed high limit and
the other settings are dependent on the
safety equipment installed in
accordance with applicable codes.
Non-condensing boiler
(VD2/VD2A) °C / °F
Condensing boiler
(CT3) °C / °F
Condensing boiler
(CM2) °C / °F
Fixed high limit
110 / 230
99 / 210
99 / 210
99 / 210
Adjustable high limit
100 / 212
95 / 203
95 / 203
95 / 203
93 / 200
87 / 188
87 / 188
88 / 190
Coding for the electronic maximum
temperature limiter of Vitotronic 100;
set code 06 to the temperature as
shown or less
Single-boiler systems:
Coding ”01: 1”
(factory setting)
Multi-boiler systems:
Set coding ”01: 3”
When a building automation system is
connected, only the connections on
plug aVD are required. The DHW tank
control unit is activated when the DHW
tank temperature sensor is connected.
The boiler water temperature must be
set to the minimum value.
When a building automation system
is connected, the connections on
plugs aVD and aVH are required.
The DHW tank temperature and the
load-dependent cascade control
must be controlled through the
building automation system.
CAUTION
5285 941 v.1.5
The boiler activation contact is
essential on multi-boiler systems.
The contact on the lead boiler
MUST be constantly closed.
44
Installation
Connections of combustion air device adaptor (VD2/VD2A/CT3 only)
Connection of the Combustion Air
Device Adaptor
1. Disconnect power to control and
burners.
2. Install Combustion Air Device
Adaptor, Part No.: 7134 563
on DIN Rail inside connection
enclosure (refer to installation
manual of Combustion Air
Device Adaptor).
3. Remove jumper between
terminals 16 and 17.
4. Make connection as shown in
the diagram.
IMPORTANT
Wire BK2 must be connected to
terminal 16 and BK3 to terminal
17 - DO NOT reverse.
A Combustion Air Device Adaptor
B DIN Rail in connection enclosure
Connection of the combustion air
blower to adaptor
Rated voltage:
120 VAC
Rating current:
max 5 FLA
Recommended connection
wire size:
AWG 14
Note:
Assure that combustion air blower
device is suitable for this application.
For detailed instruction on
adaptor installation, please refer
to the adaptor’s installation manual.
D
1. Make connection as shown in
the diagram at left.
5285 941 v.1.5
A Combustion Air Device Adaptor
in connection enclosure
B Combustion air blower motor
C Proving switch - “normally open”
rated for 120 VAC
D Power supply, 120 VAC
CAUTION
Provide disconnect means and
overcurrent protection as required
by local codes.
45
Installation
Connection of Combustion Air Device (CM2 only)
Connection of the Combustion Air
Device Adaptor
Connection of the combustion air
blower to adaptor
1. Disconnect power to control and
burners.
Rated voltage:
120 VAC
Rating current:
max 5 FLA
Recommended connection
wire size:
AWG 14
2. Install Combustion Air Device
Adaptor, Part No. 7134 563
on DIN Rail inside the boiler junction
box (refer to installation manual of
Combustion Air Device
Adaptor).
D
3. Remove plug 150 from Vitotronic
control. Remove jumper between
the 2 ’TR’ terminals. Using 14 AWG
(field supplied) connect plug
terminals TR(Left), TR(Right) and
neutral to the DIN rail.
Neutral to Terminal 16
TR(Left) to Terminal 18
TR(Right) to Terminal 19
Re-install the 150 plug and DIN rail
connections as shown in the diagram.
IMPORTANT
Ensure that combustion air blower
device is suitable for this application.
For detailed instruction on adaptor
installation please refer to the
adaptor’s installation manual.
1. Make connection as shown in the
diagram at left.
A Combustion Air Device Adaptor
in connection enclosure
B Combustion air blower motor
C Proving switch - “normally open”
rated for 120 VAC.
D Power supply, 120 VAC
¨ Safety instruction!
Provide disconnect means and
overcurrent protection as required
by local codes.
5285 941 v1.5
Wire BK2 must be connected to
terminal 18 and BK3 to terminal 19 DO NOT reverse.
46
Installation
Connection of combustion air device
(continued)
Connection of the combustion air
damper
See damper manual for correct
installation.
E
Note:
Assure that the combustion air
damper is suitable for this
application.
1. Disconnect power to control and
burner.
2. Make connection as shown in the
diagram.
A Combustion Air Device Adaptor
in connection enclosure
B Relay 120 VAC coil - field
supplied
C Combustion air damper
D End switch rated for 120 VAC
wired to “normally open”
terminal on device adaptor board
E Power supply, 120 VAC
CAUTION
Provide disconnect means and
overcurrent protection as required
by local codes.
5285 941 v.1.5
Note:
Spring return air dampers do not
require field supplied relay.
47
Installation
Flue Gas Temp. Switch (optional for CM2 equipped with SS flue collector)
(CM2 only)
1. Disconnect power.
CAUTION
Please note that the diagram shown
is only a simplified conceptual
drawing of a flue gas temperature
switch. Refer to the manual specific
to the device for interconnection
details.
2. Remove 150 plug from the
Vitotronic control.
3. Remove STB jumper from plug
150.
4. Using 14 AWG (field supplied)
connect STB(Left), STB(Right) and
ground to the DIN rail as shown
in the diagram.
STB(Left) to DIN 14
Ground to DIN 15
STB(Right) to DIN 17
5. Re-install the 150 plug into the
Vitotronic control.
5285 941 v1.5
6. Connect the Flue gas temperature
sensor to the DIN rail as shown in
the diagram.
48
Installation
Connection of low water cut-off device (VD2/VD2A/CT3 only)
1.Remove jumper between
terminals 12 and 15.
2.Make connection as shown in
diagram.
CAUTION
Please note that the diagram at
left is only a simplified conceptual
drawing of a typical low water
cut off (LWCO) device. Refer to
the manual specific to the device
for interconnection details.
aBH Power supply for accessories.
5285 941 v.1.5
aBÖ Connection for external
equipment.
49
Installation
Connection of Low Water Cut-off Device (CM2 only)
1. Remove jumper between terminals
21 and 22.
2. Make connection as shown in
diagram.
CAUTION
5285 941 v1.5
Please note that the diagram shown
is only a simplified conceptual
drawing of a typical low water
cut-off (LWCO) device. Refer to the
manual specific to the device for
interconnection details.
50
Installation
Burner connection, Burner control wiring (VD2/VD2A/CT3 only)
For burners with plug-in connection
A
The burner cables are included in the
standard delivery of the Vitotronic.
Connect the burner in accordance with
applicable codes.
ATo boiler control unit
BTo burner
Terminal codes
2. Connect plugs fA and plug lÖ to
respective counter plugs in boiler
control unit.
L1
41
120 VAC
Phase via fixed high limit to the
burner
?
Ground connection
N
Neutral connection to the burner
T1,T2 Control circuit
S3
Connection for burner fault
indicator
B4
Connection for burner hours
counter
1.Disconnect power to burner and
boiler control.
3. Connect the 7-pole plug fA and
the 3-pole plug lÖ to the burner.
B
Terminal codes
A To plug-in connection in connection
enclosure
B To burner
1,2,3 Control circuit ”2nd stage
burner or modulation controller”
(via two-point controller with
2-stage operation; via threepoint controller with modulating
operation)
1
From burner
2
Modulating down
3
Modulating up/2nd stage ON
5285 941 v.1.5
Colour codes as applicable
BK
BN
BU
Black
Brown
Blue
51
Installation
Burner Connection, Burner Control Wiring (VD2/VD2A/CT3 only) (continued)
CAUTION
This is a generic connection drawing
only! Follow the burner
manufacturer’s connection drawings
for Viessmann controls.
Write the terminal numbers or
markings on the drawing for future
reference.
Plug connection
located on the
DIN rail.
a
b
A Control unit
(Legend: see wiring diagram)
B 2nd stage or modulating *1
C Hours counter, stage 1 *1
D Burner fault indicator *1
E Control circuit, stage 1/
basic load *1
F Burner
*1
52
fÖ Power supply connection of control
unit 120 VAC
fA Burner, 1st stage
lÖ Burner, 2nd stage
aBÖ Plugs for external equipment
a External safety devices
(remove jumper when connecting)
b External controlled switch-off
(remove jumper when connecting)
aBA Safety circuit. Emergency
shut-off
Refer to burner manufacturer’s instruction on detailed connections for Viessmann controls.
5285 941 v1.5
Burner power supply not shown.
Installation
Burner Connection, Burner Control Wiring (VD2/VD2A/CT3 only) (continued)
Burner motor power supply connection
(continued)
For burners with 240 VAC, 1PH power
supply and connection in conduit.
See burner manual for correct fuse
and wire gauge sizing, and specific
connections for Viessmann controls.
1.Disconnect power to burner and
boiler control.
2.Connect 240 VAC power to the
terminals 21, 22 and 23 on the
DIN rail inside the connection
enclosure. Provide fuseable
disconnect means according to
local codes.
3.Connect supplied power cable to
the motor terminals on the burner.
4.Connect cable plug to the socket
on the DIN rail in the connection
enclosure.
5285 941 v1.5
A Burner motor power supply
240 VAC, 1PH
B Connection terminals and plug
inside connection enclosure
C Cable and conduit- factory supplied
D Burner
E Motor starter
F Burner motor
G Connection enclosure on boiler
control
53
Installation
Burner Connection, Burner Control Wiring (VD2/VD2A/CT3 only)
Burner motor power supply connection
(continued)
For burners with 3PH 208, 460 or
575V power supply.
(continued)
See burner manual for correct fuse
and wire gauge sizing, and specific
connections for Viessmann controls.
1.Disconnect power to burner and
boiler control.
2.Connect 3PH power to the
terminals 21, 22, 23 and 24 on
the DIN rail inside the connection
enclosure. Provide fuseable
disconnect means according to
local codes.
3.Connect supplied power cable to
the motor terminals on the burner.
4.Connect cable plug to the socket
on the DIN rail in the connection
enclosure.
CAUTION
During commissioning check for
correct motor rotation. If motor
rotates in opposite direction than
indicated on the burner, disconnect
power supply and reverse wires BK1
and BK2 on the burner terminals.
5285 941 v1.5
A Burner motor power supply 3PH
208, 460 or 575V
B Connection terminals and plug
inside connection enclosure
C Cable and conduit - factory
supplied
D Burner
E Motor starter
F Overload
G Burner motor
H Connection enclosure
54
Installation
Power Supply Connection, Boiler Control (VD2/VD2A/CT3 only)
Legend
L: Line
N: Neutral
G: Ground
A Power supply 120 VAC, 1 PH .
Provide disconnect means and
overcurrent protection as per local
codes
B Terminals [40]
C Connection enclosure
1. Ensure that the main power supply
to the control contains overcurrent
protection with a maximum rating
of 15 A and 2 pole disconnect.
CAUTION
The control must be grounded.
Ensure that “L”, “N” and “G” are not
interchanged.
5285 941 v1.5
2. Connect power supply wire to the
Connection fÖ terminals 11, N and
G on the DIN rail inside the
connection enclosure.
55
Installation
Burner Connection, Burner Control Wiring (CM2 only)
For burners with plug-in connection
A
The burner cables are included in the
standard delivery of the Vitotronic.
Connect the burner in accordance with
applicable codes.
ATo boiler control unit
BTo burner interface
1.Disconnect power to burner and
boiler control.
Terminal codes
2. Connect plugs fA and plug lÖ to
respective counter plugs in boiler
control unit.
L1
Phase via fixed high limit to the
burner
?
Ground connection
N
Neutral connection to the burner
T1,T2 Control circuit
S3
Connection for burner fault
indicator
B4
Connection for burner hours
counter
3. Connect the 7-pole plug fA and
the 3-pole plug lÖ to the burner.
B
A
A To plug-in connection in connection
enclosure
B To burner interface
Terminal codes
1,2,3 Control circuit ”2nd stage
burner or modulation controller”
(via two-point controller with
2-stage operation;
via three-point controller with
modulating operation)
1
From burner
2
Modulating down
3
Modulating up/2nd stage ON
BK
BN
BU
B
56
Black
Brown
Blue
5285 941 v1.5
Colour codes as applicable
Installation
Mounting the Front Part of the Control Unit (VD2/VD2A/CT3 only)
1.
7.
8.
1. Position the front part of the housing
and clip hinges to counter-parts on
main housing.
2. Release the stay bar, open it up
and lock in position at point A.
6.
3. Insert the flat cable from the
Optolink into plug ”X20”.
4. Insert the plug of the programming
unit into socket ”X10”. Use cable
guides in cover for routing.
5. Engage the stay bar in the front
housing.
6. Close the front of the housing.
2.
A
7. Secure front housing with supplied
screws.
8. Install cover of the connection
enclosure and support with supplied
screw.
5.
4.
5285 941 v1.5
3.
57
Installation
Mounting the Front Part of the Control Unit (VD2/VD2A/CT3 only)
1.
7.
8.
1. Position the front part of the housing
and clip hinges to counter-parts on
main housing.
2. Release the stay bar, open it up
and lock in position at point A.
6.
3. Insert the flat cable from the
Optolink into plug ”X20”.
4. Insert the plug of the programming
unit into socket ”X10”. Use cable
guides in cover for routing.
5. Engage the stay bar in the front
housing.
6. Close the front of the housing.
2.
A
7. Secure front housing with supplied
screws.
8. Install cover of the connection
enclosure and support with supplied
screw.
5.
4.
5285 941 v1.5
3.
58
Installation
Opening the Control Unit (VD2/VD2A/CT3 only)
1. Remove the cover of the
connection enclosure.
2. Unscrew the screws from the
front housing.
2.
3. Swing up the front part of the
control housing.
4. Position the stay bar so that it
supports the front housing.
1.
3.
5285 941 v1.5
4.
59
Installation
Control and Junction Box Installation Instructions (for CM2 only)
1. Route cables and capillaries from
control through the opening in the
control panel. Guide the cables to
the junction box through the
opening in the rear panel and along
the top rail to the control. Secure
all cables to the rail with cable ties.
Insert capillaries into the sensor well.
Note: Never allow cables to come
in contact with hot metal
components.
WARNING
Do not bend or kink the capillaries.
Damaging the capillaries leads to
malfunction.
2. Mount the control to the control
panel.
3. Secure the control to the control
panel with screws.
Note: Screws to secure control are
included with the cosmetic
cover in the boiler jacketing
package.
5285 941 v1.5
4. Install the junction box to the rear
panel either right or left. Secure the
junction box with 4 x 4.8 metal
screws.
Note:The ground screw and ground
wire can be removed and then
reinstalled with the boiler back
panel attached.
60
Installation
Mounting the Front Part of the Control Unit (CM2 only)
1. Position the front part of the housing
and clip hinges to counter-parts on
main housing.
2. Release the stay bar, open it up
and lock in position at point A.
A
3. Insert the flat cable from the
Optolink into plug ”X20”.
4. Insert the plug of the programming
unit into socket ”X10”. Use cable
guides in cover for routing.
5. Engage the stay bar in the front
housing.
6. Close the front of the housing.
7. Secure front housing with supplied
screws.
5285 941 v1.5
8. Install control cosmetic cover.
61
Installation
Opening the Control Unit (CM2 only)
1. Remove the control cosmetic
cover .
2. Unscrew the screws from the
front housing.
3. Swing up the front part of the
control housing.
5285 941 v1.5
4. Position the stay bar so that it
supports the front housing.
62
Start-up
Procedure (overview)
Page
11. Controls and indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
...........................................
64
...................................................................
65
12. Check assignment of heating circuits
13. Check the fixed high limit
14. Select the language (if required)
.......................................................
65
15. Integrate the control unit in the LON BUS system
(in conjunction with heating circuits connected
downstream) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66
16. Carry out participant check
.................................................................
..................................
68
.........................................
68
...............................................................
69
....................................................................
71
17. Match the control unit to the system type
18. Check outputs (actuators) and sensors
19. Match the coding addresses
5285 941 v.1.5
10. Adjust the heating curves
67
63
Start-up
Steps
1. Controls and indicators
Override switch
Heating circuit selection
Display window
Normal room temperature
Heating programs
Adjustable high limit
Kesseltemperatur
Mo
Fixed high limit reset button
Control on/off switch
Fuses
TÜV TEST button
Energy saving mode
Party mode
Hinged cover of programming unit
Operating status indicator (green)
Fault indicator (red)
2. Check assignment of heating circuits
Boiler temperature
Mo
5285 941 v.1.5
61
Check that the stickers for the assignment of the heating circuits are affixed in
the appropriate locations on the control unit.
The corresponding button must be pressed before commencing each setting.
64
Start-up
Steps
(continued)
3. Check the fixed high limit
The check is made via the ”TÜV TEST” button (see page 64).
When making the check, the ” TÜV
TEST” button must be kept
continuously pressed.
A minimum supply is required
during the check.
The minimum amount of recirculated
water should be 10% of the amount
recirculated at the rated load.
The amount of heat consumed
should be reduced as far as possible.
The adjustable high limit ”R” is
bridged. The burner is switched on
until the boiler water temperature
reaches the safety temperature and
the fixed high limit operates.
When the burner is switched off by
the fixed high limit, release the
”TÜV TEST” button, wait until the
boiler water temperature has fallen 15
to 20°C / 27 to 36°F below the
selected safety temperature and
then reset the fixed high limit by
pressing the ”E” button.
4. Select the language (if required)
1. Press
.
The outdoor temperature or the
participant number is displayed.
Outdoor temperature
12
2. Select the required language with
.
.
5285 941 v.1.5
3. Confirm with
65
Start-up
Steps
(continued)
5. Integrate the control unit in the LON BUS system in conjunction with Vitotronic 200-H
The LON communication module (accessory) must be inserted (see page 96).
Set the LON participant number
Set the LON participant number via
coding address ”77” in coding 1
(factory setting: ”77: 1”).
See page 114 for coding 1.
Please note:
The same number must not be
assigned twice within a LON BUS
system.
Update the LON participant list
This is only possible when all participants are connected and the control unit is
coded as the fault manager (coding ”79: 1”).
User check
simultaneously for
1. Press w and
approx. 2 seconds.
The participant check is initiated.
The participant list is updated
after approx. 2 minutes.
The participant check is
terminated.
2. Press D.
Example of single-boiler system with Vitotronic 200-H heating circuit controls and Vitocom 300 connected downstream
Vitotronic 200-H
LON
Vitotronic 200-H
LON
Vitocom
LON
Participant No. 1
Coding ”77: 1”
Participant No. 10
Coding ”77: 10”
Participant No. 11
Coding ”77: 11”
Participant No. 99
Control unit is fault manager
Coding ”79: 1”
Control unit is not fault
manager
Coding ”79: 0”
Control unit is not fault
manager
Coding ”79: 0”
Unit is fault manager
Transmit time via LON
Set coding ”7b: 1”
Time is received via LON
Set coding ”81: 3”
Time is received via LON
Set coding ”81: 3”
Time is received via LON
Transmit outdoor
temperature via LON
Coding ”97: 2”
Outdoor temperature is
received via LON
Set coding ”97: 1”
Outdoor temperature is
received via LON
Set coding ”97: 1”
Viessmann system number
Coding “98: 1”
Viessmann system number
Coding “98: 1”
Viessmann system number
Coding “98: 1”
Fault monitoring
LON-Participant
Coding “9C: 20”
Fault monitoring
LON-Participant
Coding “9C: 20”
Fault monitoring
LON-Participant
Coding “9C: 20”
66
5285 941 v.1.5
Vitotronic 300
Start-up
Steps (continued)
6. Carry out participant check
The participant check is used to verify the communication of the system units
connected to the fault manager.
Requirements:
The control unit must be coded as the fault manager (coding ”79: 1”)
The LON participant number must be coded in all control units
The participant list must be updated in the fault manager
User check
simultaneously
1. Press w and
for approx. 2 seconds.
The participant check is initiated.
Participant check
011 : 01
Participant number
Consecutive list number
Anlagenschema
Cod. 1
2. Select the required participant
or
.
with
.
3. Activate the check with
If communication between the two
units is verified, ”Check OK”
appears in the display.
If communication is not verified,
”Check not OK” appears.
”Check” flashes until the check
is completed.
The display of the selected
participant flashes for approx.
60 seconds.
Check the LON connection.
4. To check further participants,
follow the steps described in
points 2 and 3.
The participant check is
terminated.
5285 941 v.1.5
5. Press w and
simultaneously
for approx. 2 seconds.
67
Start-up
Steps
(continued)
7. Match the control unit to the system type
Set the following coding addresses in
Coding 2:
”00” System type
”02” Burner type
”03” Oil or gas-fired operation
”0C” Return temperature raising
”4C” Plug sÖ function
”4d” Plug sL function
”4E” Plug gS function
See page 116 for coding 2.
8. Check outputs (actuators) and sensors
Carry out relay test
Relay test
1. Press and
simultaneously for
approx. 2 seconds.
2. Select relay outputs with the
button.
3. Press
.
The following relay outputs can be
selected depending on the system
equipment installed:
Relay test is activated.
or
Relay test is terminated.
Mixing valve (M3) Closed
Central fault indicator ON
Burner stage 1 ON
Burner stage 1 + 2 ON
Burner modulation open
Burner modulation neutral
LED selector button ! illuminated.
Burner modulation closed
LED selector button ! illuminated.
Output 20 ON
LED selector button ! illuminated.
Output 29 ON
68
DHW tank pump ON
LED selector button ? illuminated.
DHW circulation pump ON
LED selector button § illuminated.
Heating circuit pump (M2) ON
LED selector button ? illuminated.
Heating circuit pump (M3) ON
LED selector button ? illuminated.
Mixing valve (M2) Open
LED selector button § illuminated.
Mixing valve (M2) Closed
LED selector button § illuminated.
Mixing valve (M3) Open
All LEDs extinguished.
5285 941 v.1.5
Output 52 open/closed/neutral
Start-up
Steps
(continued)
Check sensors
1. Press
.
Relaistest
2. Scan actual temperatures with
or
.
3. Press
.
Scanning of operating status
information is activated
(see page 77).
Scanning is terminated.
9. Match the coding addresses
Match control unit to modulating burner
Please note:
The burner must be adjusted. In order to achieve a wide modulation range, the
minimum output should be set as low as possible (take chimney/flue system
into account).
1. Start up the burner.
Burner mod. open
2. Press and
simultaneously
for approx. 2 seconds.
The relay test is activated.
3. With
function
Activate ”Burner mod. open” and
wait until the actuating drive of the
burner is at maximum output.
Burner mod. closed
5285 941 v.1.5
Burner mod. open
4. Establish the maximum burner
out-put through the fuel
consumption.
Make a note of the value.
function
5. With
Activate ”Burner mod. closed” and
measure the time it takes for the
actuating drive of the burner to
reach the minimum output.
Make a note of the value.
6. Establish the minimum burner
output (basic output) through the
fuel consumption.
Make a note of the value.
7. With
function
Activate ”Burner mod. open” and
stop the actuating drive by pressing
after one-third of the time
measured in point 5.
8. Establish the partial output through
the fuel consumption.
9. Press
.
Make a note of the value.
The relay test is terminated.
69
Start-up
Steps
(continued)
9. Match the coding addresses (continued)
10. Set the established values in coding
Level 1.
See page 114 for coding 1.
Address Setting of
05
the partial output (see point 8) as a percentage proportion of the
max. output; e.g.
partial output: 170 kW
max. output: 210 kW
170 kW x100 % = 81 %
210 kW
08
units and tens digits of the maximum output established in point
4: e.g. max. output: 210 kW – here set: 10
09
hundreds digit of the maximum output established in point 4: e.g.
max. output: 210 kW – here set: 2
0A
the basic output (see point 6) as a percentage proportion of the
max. output; e.g.
basic output: 70 kW
max. output: 210 kW
70 kW x100 % = 33 %
210 kW
15
the operating time in seconds established in point 5
5285 941 v.1.5
Please note:
You will find details of other possible settings in the sections entitled
”Coding 1” and ”Coding 2” (see page 114 and 116).
70
Start-up
Steps
(continued)
10. Adjust the heating curves
The heating curves represent the relationship between the outdoor temperature
and the boiler water or supply temperature. Put simply: The lower the outdoor
temperature, the higher the boiler water temperature. In turn, the room
temperature is dependent on the boiler water temperature.
2.4
2.6
3.4
3.2
3.0
2.8
Slope
2.2
2.0
1.8
Boiler water
= flow temperature in °C
1.6
1.4
1.2
The slope of the heating curve is
normally within the range marked
A for underfloor heating systems
B for modulating heating systems
C for heating systems with boiler
water temperatures over 75°C.
Factory settings:
Slope ”n” = 1.4
Shift ”N”= 0
See conversion chart on the back
of the manual for °F.
1.0
0.8
0.6
0.4
0.2
Outdoor temperature in °C
Normal room
temperature
20
Reduced room
temperature
5285 941 v.1.5
14
1. Set the desired room temperature
Desired room temperatures can
be set separately for each heating
circuit.
Normal room temperature
Set the desired day temperature with
the set-point selector.
The value is automatically
accepted after approx. 2 seconds.
Reduced room temperature
Press tm to call up the desired night
temperature; adjust the desired night
or
temperature with the
button.
Press
value.
to confirm the selected
The display changes and shows
the boiler water temperature.
71
Scanning service information
Overview of service levels
Button combination
To exit
Page
Temperatures, boiler coding cards
and scans
Press 9 and rw simultaneously
for approx. 2 seconds
Press “OK”
73
Relay test
Press 9 and “OK” simultaneously
for approx. 2 seconds
Press “OK”
68
Participant check (in conjunction
with LON)
Press w and “OK” simultaneously
for approx. 2 seconds
Press w and “OK” simultaneously
for approx. 1 second
66
Operating status information
Press Press 77
Service scan
(if ”Service” flashing)
Press “OK”
74
Adjustment of display contrast
Press “OK” and “+” or
“OK” and “-” simultaneously
Display darkens
––
Display brightens
––
5285 941 v.1.5
Function
72
Scanning service information
Temperatures, boiler coding cards and scans
Outdoor temp. damped
-5
1. Press 9 and rw simultaneously
for approx. 2 seconds.
Access diagnosis level.
2. Select the required data for scanning
with the
or
button.
3. Press
.
Exit diagnosis level.
The following values can be scanned
depending on the system equipment
installed:
Damped outdoor temp.
Current outdoor temp.
The damped outdoor temperature
can be reset to the current
outdoor temperature by pressing D.
Output reduction %
Desired boiler temp.
Current boiler temp.
Sensor 17A, current value
Sensor 17B, current value
Max. flue gas temp.
Current flue gas temp.
Desired
Current
Current
Current
DHW
DHW
DHW
DHW
temp.
temp.
temp. 1
temp. 2
Only displayed if sensor
connected.
Only displayed if sensor
connected.
Only displayed if flue gas
temperature sensor connected.
The max. flue gas temperature
can be reset to the current value
by pressing D.
Only displayed if DHW tank
temperature sensor connected.
Only displayed if two DHW tank
temperature sensors are connected.
Desired supply temp.
Current supply temp.
Only displayed if supply
temperature sensor connected.
Desired room temp.
Current room temp.
Only displayed if remote control
connected.
Boiler coding card
See overview of boiler coding
cards on page 94.
Scan
Scan
Scan
Scan
Scan
1
2
3
4
5
Scan 6
See page 74 for scans 1 to 7.
Only in conjunction with LON
communication module
Only in conjunction with LON
communication module
5285 941 v.1.5
Scan 7
73
Scanning service information
Temperatures, boiler coding cards and scans
(continued)
Scan 1
Scan 1
8
8
8
8
8
8
Free
Free
0
1
to
F
KM BUS participant
No participant connected
Number of participants
(e.g. remote control)
Burner type
0
1
2
Single-stage
2-stage
Modulating
Coding
02: 0
02: 1
02: 2
System type
System circuit A1 Mixing valve
circuit M2
1
2
3
4
5
6
7
8
9
0
Yes
Yes
Yes
Yes
Yes
Yes
DHW
tank
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Coding
00:
00:
00:
00:
00:
00:
00:
00:
00:
00:
11
12
13
14
15
16
17
18
19
10
5285 941 v.1.5
0
0
0
0
0
0
0
0
0
1
Mixing valve
circuit M3
74
Scanning service information
Temperatures, boiler coding cards and scans
(continued)
Scan 2
Scan 2
8
8
8
8
8
0
to
F
8
0
to
F
Software version
Plug-in adaptor for external safety equipment
Software version
Extension kit for mixing valve circuit M3
Free
0
to
F
0
to
F
0
to
F
Software version
Extension kit for mixing valve circuit M2
Software version
Programming unit of control unit
Software version
Control unit
Scan 3
Scan 3
8
8
8
8
8
8
0
to
F
Software version
Remote control for mixing valve circuit M3
Operating mode of mixing valve circuit M3 Coding
0
to
F
0
1
2
Without remote control
With Vitotrol 200 remote control
With Vitotrol 300 remote control
A0: 0
A0: 1
A0: 2
Software version
Remote control for mixing valve circuit M2
5285 941 v.1.5
Operating mode of mixing valve circuit M2 Coding
0
to
F
0
1
2
Without remote control
With Vitotrol 200 remote control
With Vitotrol 300 remote control
A0: 0
A0: 1
A0: 2
Software version
Remote control for system circuit A1
Operating mode of system circuit A1 Coding
0
1
2
Without remote control
With Vitotrol 200 remote control
With Vitotrol 300 remote control
A0: 0
A0: 1
A0: 2
75
Scanning service information
Temperatures, boiler coding cards and scans
(continued)
Scan 4
Scan 4 is not assigned.
Scan 5
only in conjunction with LON communication module
Scan 5
8
0
to
F
8
0
to
F
8
0
to
F
8
0
to
F
8
8
0
to
F
0
to
F
Node address
Subnet address/system number
Viessmann participant number
Scan 6
only in conjunction with LON communication module
Scan 6
8
8
8
0
to
F
0
to
F
8
0
to
F
8
8
0
1
to
F
0
1
to
F
LON participant
No participant connected
Number of participants
Software version
Neuron chip
0
to Software version
F Communication coprocessor
Tool/Auto
SNVT configuration
Scan 7
Scan 7
8
8
8
8
8
Free
Free
Free
0
to
F
76
0
to
F
Free
Equipment identification code
5285 941 v.1.5
8
Scanning service information
Scanning operating status information
1. Press
.
Outdoor temperature
12
Operating status scanning mode
is activated.
2. Select the required operating status
data for scanning with the
or
button.
3. Press
.
Exit the operating status scanning
mode.
The following operating status
information can be scanned depending
on the system equipment installed:
Participant number
Holiday program
with date of departure and return
Holiday program active
Outdoor temperature
Boiler temperature
Flue gas temperature
Sensor 17A
Sensor 17B
DHW temperature
DHW temperature 1
DHW temperature 2
Supply temperature
Burner hours run
– 1st stage burner
– 2nd stage burner
Number of burner starts
Fuel consumption
Only displayed if flue gas
temperature sensor is connected.
Only displayed if sensor is
connected.
Only displayed if DHW tank
temperature sensor is connected.
Only displayed if two DHW tank
temperature sensors are connected.
Only displayed in conjunction with
mixing valve circuits.
Reset hours runs, number of
burner starts and fuel consumption
after carrying out maintenance.
By pressing D, the values can be
individually reset to zero.
Only displayed if selected via
coding addresses ”26” or ”29”.
Position stated in %.
Position stated in %.
to select the respective
Press
language as the permanent
language for all displays.
5285 941 v.1.5
Time
Date
1st stage burner ON/OFF
2nd stage burner ON/OFF
Output 20 ON/OFF
Output 29 ON/OFF
Output 52 Open/Closed
DHW tank pump ON/OFF
DHW pump ON/OFF
Heating circuit pump ON/OFF
Mixing valve Open/Closed
Different languages
Only displayed when LON
communication module is installed.
If holiday program has been
entered.
When the holiday program is
activated.
77
Scanning service information
Scanning and resetting the ”Service” display
When the limit values selected via coding addresses ”1F”, ”21” and ”23” (see
page 120) are reached, the ”Service” display flashes on the programming unit.
Please note:
If a service is carried out before ”Service” is displayed, set the coding address
”24: 1” and then coding address ”24: 0”.
Press
.
Service scan is activated.
Service
MFlue gas temperature
°C
220
Scan the service messages with the
or
button.
Press
and confirm the display
”Acknowledge: Yes” by pressing
.
Press
.
The ”Service” display is
extinguished.
Please note:
An acknowledged service
message can be displayed again
by pressing
(for approx.
3 seconds).
Service scan is terminated.
Boiler temperature
78
After carrying out maintenance,
reset coding ”24: 1” (see page 120)
to ”24: 0”.
If coding address ”24” is not
reset, the ”Service” display will
re-appear at 07:00 hrs on Monday.
If necessary: After carrying out
maintenance
Press
.
Reset burner hours run, number
of burner starts and fuel
consumption.
Press
.
See ”Scanning operating status
information” on page 77.
If necessary: After carrying out
maintenance
Press and rw simultaneously
for approx. 4 seconds.
Reset ”Max. flue gas temp.” to
the current value by pressing D.
Press
.
See ”Temperatures, boiler coding
cards and scans” on page 74.
5285 941 v.1.5
61
Troubleshooting
Troubleshooting steps
Diagnosis
1. Establish fault message or ascertain behaviour of system
2. Look for the corresponding cause of the fault in the
diagnosis tables
Please note:
Retrieve fault codes from the fault memory
3. Establish the action required in the table
4. Correct the fault
5285 941 v.1.5
Correction
79
Troubleshooting
Diagnosis
Faults with fault display on the programming unit
Fault
57
Fr
Fault
Mo
1
w
A
57 ºC
Outdoor sensor
DBG-
1
1
10
1
The meaning of the fault code is
explained in the table on page 81
onwards.
Search fault
1. Press
.
The fault can be acknowledged
by pressing
. The fault message
in the display 1 is blanked out;
the red fault indicator 2 continues
to flash.
The central fault indicator
connected to plug gÖ is switched
off. If an acknowledged fault is not
rectified by 07:00 hrs on the
following day, the fault message
will re-appear in the display.
2. Other fault codes which may be
stored can be called up by pressing
the
or
button.
Fault
DBG-
When a fault message is transmitted,
--Fault-- flashes in the display 1 of the
programming unit.
2
67
Acknowledge? Yes
1
Structure of fault display
DBG-
1
1
10
To retrieve an acknowledged fault
message
for approx. 3 seconds; select
Press
the acknowledged fault by pressing the
or
button.
The fault is then displayed
Please note:
The red fault indicator 2 flashes
whenever there is a fault.
80
Fault display
(”Plain language” or ”Fault”)
Fault code
(meaning: see page 70)
Fault number
(1 to 10)
Fault symbol
Faults displayed in plain language
Burner
Fixed high limit
Safety circuit, potential free
Ext. fault
Outdoor sensor
Supply sensor
Boiler sensor
DHW tank temperature sensor 1
(or 2)
Sensor 17A
Sensor 17B
Room sensor
Flue gas sensor
Participant fault
C1, C8, C9, CA, Cb
Meaning: see table on page 84.
Only displayed if a second DHW
tank temperature sensor is
connected.
Only displayed if the control unit is
coded as the fault manager.
5285 941 v.1.5
Outdoor sensor
Troubleshooting
Diagnosis
(continued)
5285 941 v.1.5
Faults with fault display on the programming unit (continued)
Fault code
in display
Behaviour of system
Cause of fault
Action
0f
Controlled operation
Service required
”0F” is only displayed
in the fault history
Carry out maintenance
Please note:
After carrying out maintenance, set coding ”24: 0”.
10
Operates on basis of 0°C outdoor
temperature
Short circuit
Outdoor temperature sensor
Check outdoor temperature
sensor (see page 99)
18
Operates on basis of 0°C outdoor
temperature
Open circuit
Outdoor temperature sensor
Check outdoor temperature
sensor (see page 99)
30
Burner is switched on and off by the
adjustable high limit
Short circuit
Boiler temperature sensor
Check boiler temperature
sensor (see page 101)
38
Burner is switched on and off by the
adjustable high limit
Open circuit
Boiler temperature sensor
Check boiler temperature
sensor (see page 101)
40
Mixing valve is closed
Short circuit
Supply temperature sensor of
mixing valve circuit M2
Check supply temperature
sensor (see page 28)
44
Mixing valve is closed
Short circuit
Supply temperature sensor of
mixing valve circuit M3
Check supply temperature
sensor (see page 86)
48
Mixing valve is closed
Open circuit
Supply temperature sensor of
mixing valve circuit M2
Check supply temperature
sensor (see page 86)
4c
Mixing valve is closed
Open circuit
Supply temperature sensor of
mixing valve circuit M3
Check supply temperature
sensor (see page 86)
50
DHW tank heating pump ON:
Desired boiler temperature = desired
DHW tank temperature, priority controls
are cancelled.
In conjunction with DHW tank heating
system:
DHW tank heating is switched on and off
by DHW tank temperature sensor 2.
Short circuit
DHW tank temperature
sensor 1
Check DHW tank
temperature sensor
(see page 101)
51
In conjunction with DHW tank loading
system:
DHW tank heating is switched on and off
by DHW tank temperature sensor 1.
Short circuit
DHW tank temperature sensor
2
Check DHW tank
temperature sensor
(see page 101)
58
DHW tank loading pump ON:
Desired boiler temperature = desired
DHW tank temperature, priority controls
are cancelled.
In conjunction with DHW tank loading
system:
DHW tank heating is switched on and off
by DHW tank temperature sensor 2.
Open circuit
DHW tank temperature sensor
1
Check DHW tank
temperature sensor (see
page 101)
59
In conjunction with DHW tank loading
system:
DHW tank heating is switched on and off
by DHW tank temperature sensor 1.
Open circuit
DHW tank temperature sensor
2
Check DHW tank
temperature sensor (see
page 101)
81
Troubleshooting
Diagnosis
(continued)
Faults with fault display on the programming unit (continued)
Fault code
in display
Behaviour of system
Cause of fault
Action
60
Boiler with maximum temperature
No output reduction
Return control open
Short circuit
Temperature sensor aJA
Check temperature sensor
(see page 102)
68
Boiler with maximum temperature
No output reduction
Return control open
Open circuit
Temperature sensor aJA
Check temperature sensor
(see page 102)
70
Shunt pump ON continuously
Short circuit
Temperature sensor aJB
Check temperature sensor
(see page 102)
In conjunction with DHW tank
loading system:
Mixing valve of primary circuit
closed.
No domestic hot water heating
Open circuit
Temperature sensor aJB
Check temperature sensor
(see page 102)
92
Controlled operation
Only the solar control fault codes are
displayed
Short circuit
Collector temperature sensor S1
on the Vitosolic
Check sensor on the solar
control
93
Controlled operation
Only the solar control fault codes are
displayed
Short circuit
Temperature sensor S3 on the
Vitosolic
Check sensor on the solar
control
94
Controlled operation
Only the solar control fault codes are
displayed
Short circuit
Collector temperature sensor S2
on the Vitosolic
Check sensor on the solar
control
9a
Controlled operation
Only the solar control fault codes are
displayed
Open circuit
Collector temperature sensor S1
on the Vitosolic
Check sensor on the solar
control
9b
Controlled operation
Only the solar control fault codes are
displayed
Open circuit
Temperature sensor S3 on the
Vitosolic
Check sensor on the solar
control
9c
Controlled operation
Only the solar control fault codes are
displayed
Open circuit
DHW tank temperature sensor S2
on the Vitosolic
Check sensor on the solar
control
9f
Controlled operation
Only the solar control fault codes are
displayed
Fault on solar control message
will display if no fault code is
assigned to the fault
Check the solar control
In conjunction with DHW tank
loading system:
Mixing valve of primary circuit
closed.
No domestic hot water heating
Shunt pump ON continuously
5285 941 v.1.5
78
82
Troubleshooting
Diagnosis
(continued)
5285 941 v.1.5
Faults with fault display on the programming unit (continued)
Fault code Behaviour of system
in display
Cause of fault
Action
aa
Controlled operation
Therm-Control configuration
fault: plug aJA of
Therm-Control temperature
sensor not inserted
Insert plug aJA
On Vitocrossal:
Check that coding ”0d: 0”
is set.
ab
Controlled operation,
DHW tank may be cold
DHW tank loading system
configuration fault: coding ”55: 3” is
set, but plug aJB is not inserted and/
or coding ”4C: 1” and ”4E: 1” not set
Insert plug aJB and check
codings
ac
Controlled operation
Return temperature raising
configuration fault: coding ”0C: 1” is
set, but plug aJA is not inserted
and/or coding ”4E: 0” is not set
Insert plug aJA and check
codings
b0
Controlled operation
Short circuit
Flue gas temperature sensor
Check flue gas temperature
sensor (see page 29)
b1
Controlled operation
Communication fault
Programming unit
Check connections, if
necessary replace
programming unit
b4
b5
b6
Emissions test mode
Internal fault
Check electronics board
Controlled operation
Internal fault
Check electronics board
Operation at constant
temperature
Invalid hardware code
Check the control software
circuit board and confirm the
coding address:
- Enter coding 2 (see page 125
for instructions).
- Change code 8A to 176.
- Confirm coding 92:165
b7
Boiler controlled on basis of
adjustable high limit
Internal fault
Boiler coding card
Insert boiler coding card or
replace if defective
(see page 22)
b8
Controlled operation
ba
Mixing valve continues in control
mode
Open circuit
Flue gas temperature sensor
Communication fault
Circuit board for mixing valve
extension
Check flue gas temperature
sensor (see page 104)
Check circuit board
bc
Controlled operation without
remote control
Communication fault
Vitotrol remote control,
system circuit A1
Check connections, cable and
coding address ”A0”
(see Coding 2 page 127)
bd
Controlled operation without
remote control
Communication fault
Vitotrol remote control,
mixing valve circuit M2
Check connections, cable and
coding address ”A0”
see Coding 2 page 127
be
Controlled operation without
remote control
Communication fault
Vitotrol remote control,
mixing valve circuit M3
Check connections, cable and
coding address ”A0”
see Coding 2 page 127
bf
Controlled operation
Incorrect LON communication module
Replace communication
module
83
Troubleshooting
Diagnosis
(continued)
Fault code Behaviour of system
in display
Cause of fault
Action
c1
Boiler cools down
External safety equipment
Check connection of plug
aBÖ
Check external safety
equipment (see page 40)
c2
Controlled operation
Open circuit
KM-BUS to solar control
Check KM-BUS connection and
solar control. Without solar
control, set coding address
“54: 0”
c4
Controlled operation
Fault
Input module 0-10V
Check all connections, cables etc.
Replace function expansion
module; without expansion
module set coding address
“9d: 0”
c8
Boiler cools down
Fault
Low water indicator
Check water level of system,
reset low water indicator
c9
Boiler cools down
Fault
Maximum pressure limiter
Check system pressure, reset
maximum pressure limiter
ca
Boiler cools down
Fault
Minimum pressure limiter or
maximum pressure limiter 2
Check system pressure, reset
minimum or maximum pressure
limiter
cb
Boiler cools down
Fault
Additional fixed high limit
Check system pressure, reset
fixed high limit, reset flue gas
damper
cd
Controlled operation
Communication fault
Vitocom 300
Check connections and
Vitocom 300
cEe
Controlled operation
Communication fault
Plug-in adaptor for external safety
equipment
Check plug-in adaptor for
external safety equipment
cf
Controlled operation
Fault
LON communication module
Replace communication module
d1
d4
d6
Boiler cools down
Burner fault
Check burner
Boiler cools down
Fixed high limit has operated
Check fixed high limit
Controlled operation
Fault at DE1 in the plug-in
adaptor for external safety equipment
Check connection at inputs DE1
to DE3
d7
Controlled operation
Fault at DE2 in the plug-in
adaptor for external safety equipment
d8
Controlled operation
Fault at DE3 in the plug-in
adaptor for external safety equipment
da
Controlled operation without
influence of room
temperature
Short circuit
Room temperature sensor, system
circuit A1
Check room temperature sensor
(see page 112)
db
Controlled operation without
influence of room
temperature
Short circuit
Room temperature sensor,
mixing valve circuit M2
Check room temperature sensor
(see page 112)
84
5285 941 v.1.5
Faults with fault display on the programming unit (continued)
Troubleshooting
Diagnosis
(continued)
Faults with fault display on the programming unit (continued)
Fault code Behaviour of system
in display
Cause of fault
Action
dc
Controlled operation without
influence of room temperature
Short circuit
Room temperature sensor,
mixing valve circuit M3
Check room temperature sensor
(see page 112)
dd
Controlled operation without
influence of room temperature
Open circuit
Room temperature sensor,
system circuit A1
Check room temperature sensor
(see page 112)
de
Controlled operation without
influence of room temperature
Open circuit
Room temperature sensor,
mixing valve circuit M2
Check room temperature sensor
(see page 112)
df
Controlled operation without
influence of room temperature
Open circuit
Room temperature sensor,
mixing valve circuit M3
Check room temperature sensor
(see page 112)
e0
Controlled operation
Open circuit
LON communication module
Check connection
(see page 96)
Retrieving fault codes from the fault memory (fault history)
All faults which have occurred are stored and can be retrieved by scanning.
The scanning sequence starts with the most recently stored fault code.
1234567
and
simultaneously for
1. Press
approx. 2 seconds.
Scanning of fault history is
activated.
2. Access the individual fault codes by
pressing the
or
button.
All stored fault codes can be
deleted by pressing .
Sequence of
stored fault
codes
Fault code
1
Last (most recent)
fault code
..
.
..
.
10
5285 941 v.1.5
3. Press
Last fault code but
nine
.
Scanning of fault history is
terminated.
85
Functional description
Boiler temperature control
Brief description
The boiler water temperature is
controlled by switching the burner
stages or modulation on and off.
The desired boiler water temperature
value is determined by the set-point
supply temperature value of the boiler
circuit (A1), the mixing valve circuits
or the heating circuits connected via
the LON BUS, through the external
request facility and the desired
domestic hot water temperature, and
is dependent on the boiler and the
heating and control facilities installed.
In conjunction with Therm-Control:
The desired boiler water temperature
is increased when the temperature
falls below the set-point value on
the sensor of the Therm-Control.
When the domestic hot water tank
is heated up, a desired boiler water
temperature is selected which is
20°C / 36°F higher than the desired
DHW tank water temperature (this
value can be changed via coding
address ”60”).
Coding addresses which influence
the boiler temperature control
Upper limits of control range
Lower limit of control range
Fixed high limit FHL 110°C / 230°F,
can be adjusted to 99°C / 210°F
Adjustable high limit AHL 95°C, can
be adjusted to 100°C / 212°F
Electronic maximum limit
Setting range: 20 to 127°C / 68 to
261°F
The maximum limit for the boiler
water temperature is defined in
coding address ”06”.
The control unit regulates the
boiler water temperature in
normal operation and in the
frost protection mode according
to the boiler concerned (boiler
coding card).
02 to 06, 08 to 0b, 13 to 1C
See page 114 onwards for
description.
Functions
The boiler water temperature is
measured via a multiple sensor well by
three sensors separately:
Fixed high limit FHL (liquid
expansion)
Adjustable high limit AHL (liquid
expansion)
Boiler temperature sensor BTS
(change in resistance PT 500)
Boiler temperature falls
Boiler temperature rises
The burner switch-on signal is set for
a boiler water temperature set-point
value of –2°C / -4°F, and the burner
starts its own monitoring program.
Depending on the range of additional
control facilities and the method of
firing, burner override can be delayed
by a few minutes.
The switch-off point of the burner is
defined by the switch-off differential
(coding address ”13”).
86
5285 941 v.1.5
Control sequence
Functional description
Heating circuit control
Brief description
The control unit has control loops for a
system circuit and two mixing valve
circuits.
The supply temperature set-point value
is determined by the outdoor
temperature, the desired room
temperature, the operating mode and
the heating curve.
The supply temperature of the mixing
valve circuits is controlled by opening
and closing the mixing valves in steps.
The mixing valve motor control varies
the actuation and interval times as a
function of the control difference
(control deviation).
The supply temperature of the system
circuit corresponds to the boiler water
temperature.
Domestic hot water temperature
Room temperature
With priority control:
While the DHW tank is being heated,
the set-point supply temperature
value is set to 0°C / 32°F .
The heating circuit pump is
switched off.
Without priority control:
The heating circuit control continues
to operate as normal with the
set-point value unchanged.
With modulating priority control
(only in conjunction with mixing
valve circuit):
The heating circuit pump remains
switched on. The set-point supply
temperature of the heating circuit
is lowered as long as the set-point
boiler water temperature is not
reached while the DHW tank is
being heated. The set-point supply
temperature is dependent on the
difference between the set-point and
the current boiler water temperature,
the outdoor temperature, the heating
curve slope and the setting of the
coding address ”A2”.
In conjunction with room
temperature dependent control:
Coding addresses which influence the
heating circuit control
9F
A2 to A7, A9,
C4 to C7, C8
F1, F2.
See page 114 onwards for description.
Functions
The heating circuit is dependent on the
boiler water temperature and its control
range limits.
The only control element is the heating
circuit pump.
The supply temperature of the mixing
valve circuits is measured by the
supply temperature sensor (contact
sensor).
Time program
The timer of the control unit changes
the operating mode at the programmed
times in the ”Central heating and
DHW” heating program, switching
between ”Central heating with normal
room temperature” and ”Central
heating with reduced room
temperature”.
Each operating mode has its own
set-point value.
5285 941 v.1.5
Outdoor temperature
A heating curve must be adjusted to
match the control unit to the building
and the heating system.
The heating curve determines the
set-point boiler water temperature
value as a function of the outdoor
temperature. Control takes place on
the basis of the mean outdoor
temperature. This is derived from the
actual and the damped outdoor
temperature.
The heating curve can be changed via
the set-point or operating mode
selector switches.
Compared with the outdoor
temperature, the room temperature
has a greater influence on the
set-point boiler water temperature.
The magnitude of this influence can
be changed via coding address ”b2”.
In conjunction with mixing valve
circuit:
With control differences
(i.e. deviations from the current
value) of over 2°C / 4°F room
temperature, this influence can be
intensified (via coding address ”b6”,
rapid heating/setback).
87
Functional description
Heating circuit control (continued)
Functions (continued)
Extended summer energy saving
function
The heating circuit pump can be
switched off
If the outdoor temperature exceeds a
value preselected via coding address
”A6”
If the set-point room temperature is
reduced via coding address ”A9”
In conjunction with mixing valve
circuit:
If the mixing valve has been closed
for longer than 12 minutes (mixing
valve energy saving function, coding
address ”A7”)
Slab curing function
(only in conjunction with mixing valve
circuit)
Please note:
The slab curing function is selectable
on the basis of four different
temperature curves. The curves are
activated via coding address ”F1”
(see page 134).
When the slab curing function is
activated, the heating circuit pump of
the mixing valve circuit is switched on
and the supply temperature is
controlled according to the selected
curve. When the slab curing time (30
days) has expired, the mixing valve
circuit is automatically controlled on
the basis of the preset parameters.
88
The control behaviour of the mixing
valve can be influenced via coding
address ”C4”.
Frost protection
A supply temperature of 15 to 22°C /
59 to 72°F is assured for outdoor
temperatures below +1°C / 34°F
(two-point control).
For possible changes, see coding
address ”A3” (variable frost threshold).
Therm-Control
Heating circuit output reduction takes
place if the boiler return temperature
falls below the setpoint value (value
read on the therm-control sensor).
Heating circuit mixing valves modulate
closed until the Therm-control sensor
is satified.
Supply temperature control
Differential temperature:
The differential temperature can be
selected via coding address ”9F”,
factory setting: 8°C / 14°F.
The differential temperature is the
minimum difference by which the
boiler water temperature should
exceed the highest currently required
supply temperature of the mixing
valve circuit.
System with only one mixing
valve circuit:
The desired boiler water
temperature is automatically
controlled at 8°C / 14°F above
the desired supply temperature
value.
System with heating circuit and
mixing valve circuit:
The desired boiler water
temperature is controlled according
to its own heating curve. The
temperature difference of
8°C / 14°F.
from the desired supply
temperature is preset in the
factory.
Outdoor temperature in °C
A Max. boiler water temperature
B Slope = 1.8 Heating circuit
C Slope = 1.2 Mixing valve circuit
D Boiler water temperature
(with differential temperature =
8°C / 14°F.)
E Minimum boiler water
temperature
5285 941 v.1.5
If the outdoor temperature is higher
than the preset room temperature
set-point value, the heating circuit
pump is switched off and the set-point
supply temperature value is set to
0°C / 32°F.
The switching threshold can be
individually selected via coding address
”A5”.
System dynamics – mixing valve
circuit (only in conjunction with
mixing valve circuit)
Boiler water temperature/
supply temperature in °C
Summer energy saving function
(heating circuit pump logic)
Functional description
Heating circuit control (continued)
Functions (continued)
Upper limit of control range
Lower limit of control range
Electronic maximum limit
Setting range:
1 to 127°C / 34 to 260°F.
Change via coding address ”C6”.
Electronic minimum limit
Setting range:
1 to 127°C / 34 to 261°F.
Change via coding address ”C5”.
Please note:
The maximum limit does not replace
the limit thermostat required for
underfloor heating systems.
Limit thermostat for underfloor heating
systems:
The limit thermostat switches the
heating circuit pump off when the
supply temperature rises above the
preset value. In this situation, the
supply temperature cools down only
slowly, i.e. automatic re-starting can
take several hours.
Control sequence
Mixing valve circuit
The mixing valve motor is not activated
within the ”neutral zone”
(±1°C / 2°F).
Supply temperature rises
(Set-point value –1°C / -2°F)
The mixing valve motor receives the
signal ”Open mixing valve”.
The greater the control difference, the
longer the duration of the signal and
the shorter the duration of the
intervals.
(Set-point value +1°C / +2°F):
The mixing valve motor receives the
signal ”Close mixing valve”.
The greater the control difference, the
longer the duration of the signal and
the shorter the duration of the
intervals.
5285 941 v.1.5
Supply temperature falls
89
Functional description
DHW tank temperature control
Brief description
The DHW tank temperature control is a
constant value control. It operates on
the basis of switching the circulation
pump for heating the DHW tank on and
off.
The switching differential is ±2.5°C /
4.5°F.
During DHW tank heating, a constant
maximum boiler water temperature is
set and space heating is switched off
(DHW tank priority control optional).
Coding addresses which influence
the DHW tank temperature control
Time program
Frost protection function
DHW circulation pump
An automatic or an individual time
program can be selected for domestic
hot water heating and the DHW
circulation pump.
In the automatic program, domestic
hot water heating precedes the heat-up
phase of the heating circuit by 30
minutes. On systems with several
heating circuits, the time program is
based on the switching times of the
first heating circuit to be heated.
In the individual time program, up to
four switching times per day can be
set on the timer for domestic hot water
heating and the DHW circulation pump.
Once started, heating of the DHW tank
is always completed regardless of the
time program.
The switching times for domestic hot
water heating and the DHW circulation
pump are effective for all heating
circuits. Individual switching times can
be assigned to each heating circuit via
the coding address ”7F”.
If the domestic hot water temperature
falls below 10°C / 50°F, the
domestic hot water DHW tank is
heated to 20°C / 68°F.
The DHW circulation pump supplies
hot water to the take-off points at
selectable times. Up to four
switching times can be set on the
timer.
55, 56, 58 to 62, 64, 66, 70 to 75,
7F, A2.
See page 114 onwards for description.
Functions
Additional function for domestic hot
water heating
This function is activated when a
second DHW setpoint value is selected
via coding address ”58” and the 4th
activation period for domestic hot
water heating is activated.
Additional control facilities
The domestic hot water supply can
be blocked and released via
changeover of the heating program.
Desired domestic hot water
temperature
The desired domestic hot water
temperature can be set in the range
of 10 to 60°C / 50 to 140°F. The
set-point range can be extended to
95°C / 203°F via coding address
”56”.
The desired domestic hot water
temperature can be set on the
programming unit of the control unit
and on the Vitotrol 300 remote control
(if installed).
The set-point value can be assigned via
coding address ”66”.
The functions described above also
apply in conjunction with DHW tank
loading systems.
Set the following codings:
”4C: 1”, ”4E: 1”, ”55: 3”.
90
5285 941 v.1.5
System with DHW tank loading system
Functional description
DHW tank temperature control
(continued)
Control sequence
DHW tank temperature falls
DHW tank temperature rises
(Set-point value –2.5 °C / 4.5 °F,
selectable via coding address ”59”)
The desired boiler water temperature
is set 20 K higher than the DHW
temperature set-point value (selectable
via coding address ”60”).
(Set-point value +2.5 / 4.5°F)
The boiler water temperature set-point
value is reset to the weathercompensated value.
The circulation pump for heating the
DHW tank is switched on immediately
(Coding ”61: 01”).
Boiler temperature-dependent switching
of the circulation pump for heating the
DHW tank (Coding ”61: 00”):
The circulation pump is switched on
when the boiler water temperature is
7°C / 13°F higher than the domestic
hot water temperature.
5285 941 v.1.5
With priority control:
(Coding ”A2: 2”)
The supply temperature set-point
value is set to 0 °C / 32°F when the
DHW tank is being heated. The
mixing valve is closed and the
heating circuit pump is switched off.
Without priority control:
The heating circuit control continues
to operate as normal with the
setpoint value unchanged.
With modulating priority control (only
in conjunction with mixing valve
circuit):
The heating circuit pump remains
switched on. The desired supply
temperature is lowered as long as the
desired boiler water temperature is
not reached while the DHW tank is
being heated. The desired supply
temperature is dependent on the
difference between the desired and
the current boiler water temperature,
the outdoor temperature, the heating
curve slope and the setting of the
coding address ”A2”.
When the DHW tank has been
heated up, the circulation pump for
heating the DHW tank continues to
run until:
the temperature difference between
the boiler water and domestic hot
water is less than 7°C / 13°F, or
the desired, weather-compensated
boiler water temperature is
reached, or
the desired domestic hot water
temperature is exceeded by
5°C / 9 °F.
The max. run-on time is 15 minutes
(selectable via coding address ”62”).
Circulation pump for heating the
DHW tank without run-on time
(Coding ”62: 00”):
The circulation pump is switched off
immediately.
With priority control
(Coding ”A2: 2”):
The supply temperature set-point
value is reset to the weathercompensated value.
The heating circuit pump is
switched on.
With optimized DHW tank heating
(Coding ”55: 1”):
Optimized DHW tank heating takes
into account the rate at which the
temperature increases during
domestic hot water heating.
It also takes into account whether
the boiler must supply heat for space
heating purposes after heating up the
DHW tank or whether the residual
heat of the boiler should be
transferred to the domestic hot
water DHW tank.
The control unit determines the
switch-off time of the burner and the
circulation pump accordingly so that
the desired domestic hot water
temperature is not substantially
exceeded after DHW tank heating is
completed.
91
Additional information
Overview
Page
Technical data
..................................................................................................................................................................
93
System components
Line-voltage motherboard . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Low-voltage motherboard . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Power supply unit board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Electronics board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Mixing valve extension circuit board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Electronics board for mixing valve extension . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Optolink/emissions test switch board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Programming unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Front panel with heating circuit selector buttons . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fuse box . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
LON communication module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Boiler coding card . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fuses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
TEST button . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fixed high limit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Adjustable high limit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Outdoor temperature sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Boiler temperature sensor and DHW tank temperature sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Strap-on temperature sensor/immersion temperature sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Flue gas temperature sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation examples . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Vitotrol 200 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Vitotrol 300 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Connection of two or more remote controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Room temperature sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Input Module 0 to 10V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
94
94
94
94
95
95
95
95
96
96
96
97
97
97
98
98
99
101
102
104
105
106
108
110
112
113
Coding 1
Call up coding level 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Codings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
114
114
Coding 2
Call up coding level 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Reset codings to factory settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Overview of all codings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
116
116
116
Wiring diagram
135
5285 941 v.1.5
.................................................................................................................................................................
92
Additional information
Technical data
Rated voltage: 120V
Rated frequency: 60 Hz
Rated current:
2 x 6A
Power
consumption:
10W
Protection class: I
Degree of
IP 20 D to
protection:
EN 60 529, to be
guaranteed by
mounting/integration
Method of
Type 1B to
operation:
EN 60 730-1
Ambient temperature
During
operation:
0 to 40°C /
32 to 104°F
For use in boiler rooms
(normal ambient conditions)
During storage and
transport:
–20 to 65˚C /
-4 to 149°F
Relay outputs at 120V for
Heating circuit
pumps or control
output sÖ:
2 FLA, 120 VAC*1
Circulation
pump for heating the DHW tank
sA:
2 FLA, 120 VAC*1
DHW circulation
pump sK:
2 FLA, 120 VAC*1
Shunt
pump sL:
2 FLA, 120 VAC*1
Central fault
indicator gÖ:
2 FLA, 120 VAC*1
Mixing valve
motor return
temperature
raising
or
3-way valve
DHW tank heating system
or
mixing valve
motor gS:
0.1 FLA,
120 VAC*1
Burner
plug fA:
4 FLA, 120 VAC
plug lÖ:
– 2-stage
0.5 FLA 120 V~
– modulating 0.1 FLA 120 V~
Total max. 6 A 120V
5285 941 v.1.5
*1
93
Additional information
System components
Line voltage motherboard, Part No. 7165 782
The motherboard contains:
Relays and outputs for activating
the pumps, the control elements
and the burner
Plug-in location for power supply
unit board and boiler control
section
Low-voltage motherboard, Part No. 7820 290
The motherboard contains:
Plugs for sensors, communication
connections and external
equipment
Plug-in locations for electronics
board, LON communication module,
programming unit, boiler coding
card and Optolink board
Power supply unit board, Part No. 7823 991
The power supply unit board
contains the low-voltage supply
for the entire electronics.
Electronics board, Part No. 7828 193
When replacing the board:
1. Make a note of codings and
settings on the control unit.
2. Replace the board.
3. Set coding ”8A: 176” and set
coding address ”92” (not listed
in the overview) to ”92: 165”.
94
5285 941 v.1.5
The board contains the
microprocessor with the software
Additional information
System components
(continued)
Mixing valve extension board, Part No. 7820 193
The board contains the relays for
activating the mixing valve motor
and the heating circuit pump of the
mixing valve circuits M2 and M3.
Electronics board, Part No. 7829 790
This is connected to the mixing
valve extension board.
All data are processed and the
outputs (relays) activated.
Optolink/emissions test switch board, Part No. 7820 165
The circuit board contains:
Operating status indicator
Fault indicator
Optolink laptop interface
Emissions test switch
Emissions test switch for flue gas
measurements with the boiler
operated with constant boiler water
temperature for a short time.
The burner is switched on
(this can be delayed if the system
incorporates a fuel preheater)
all pumps are switched on
the mixing valve remains in its
control mode
the boiler water temperature is
controlled by the adjustable high
limit ”R”.
Programming unit, Part No. 7823 986
5285 941 v.1.5
The programming unit is inserted in
the control unit.
For setting:
Heating program
Set-point values
Switching times
Heating curve (shift and slope)
Date
Time
Energy saving and party mode
For displaying:
Temperatures
Operating status information
Faults
95
Additional information
System components
(continued)
Front panel with heating circuit selector buttons, Part No. 7818 623
For displaying and selecting the
heating circuit.
Fuse box, Part No. 7820 172
The fuse box contains:
Fixed high limit
Adjustable high limit
Fuses
Heating system switch
TEST button
LON communication module, Part No. 7172 173
Accessory
LON
LON
A
LON
LON
A
LON
LON
A
The communication module is
inserted in the control unit.
Interruption of communication is
indicated.
1 terminal resistor is inserted on
each of the first and last control
units.
C
B
B
C
5285 941 v.1.5
A Control unit or Vitocom 300
B Connecting cable for data transfer
between the control units
(accessory)
C Terminal resistor,
Part No. 7143 497
96
Additional information
System components (continued)
Boiler coding card
Vitotronic 300
in conjunction with
Vitorond 200
Vitocrossal 300, Type CT3
Vitocrossal 200, Type CM2
Boiler coding card
Part No.
1020
1040
1041
7820 142
7820 144
7820 145
Fuses
F1: 6.3 A, 250 V for protecting
the control elements, pumps and
electronics
Mounting location: see drawing
Part No. 7404 365
F2: 6.3 A, 250 V for protecting
the burner
Mounting location: see drawing
Part No. 7404 365
F1
F2
TEST button, Part No. 7819 314
5285 941 v.1.5
For checking the fixed high limit.
See description on page 65.
97
Additional information
System components
(continued)
Fixed high limit, Part No. 7820 036
The fixed high limit has a factory setting of 110°C/ 230°F.
Electromechanical temperature switch based on the liquid expansion principle
with interlock
Intrinsically safe; interlocking also takes place if the capillary tube is leaking or
if ambient temperatures are below –10°C / 14°F
Limits the boiler water temperature to the maximum permissible value by
cutting out and interlocking
Can be adjusted with the slotted screw A at the rear of the unit to 99°C /
210°F (cannot be reset to 110°C / 230°F once adjusted)
Reset unit by pressing the reset button ”E” on the front of the programming
unit if the temperature has fallen approx. 15 K below the shut down temperature
Central fastening M 10, capillary 3600 mm long
Tests:
Functional check via TÜV TEST button
Adjustable high limit, Part No. 7817 531
The adjustable high limit has a factory setting of 95°C / 203°F
Electromechanical temperature switch based on the liquid expansion principle
Controls the maximum boiler water temperature (e.g. in emissions test mode)
Can be adjusted to 100°C / 212°F by altering the setting
of the stop dial or by removing the cams
IMPORTANT
Set the lower limit at least 20°C / 36°F
higher than the domestic hot water
temperature, the upper limit at least
15°C / 27°F lower than the fixed
high limit.
5285 941 v.1.5
Adjusting shaft 6 mm / 0.27 inches,
flat topped
Adjusting knob pushed onto shaft
from front
Capillary 3600 mm / 141.7 inches long
Sensor 3 mm / 0.1inches thick,
180 mm / 7.1inches long
Tests:
Functional check via emissions test mode
98
Additional information
System components
(continued)
Outdoor temperature sensor, Part No. 7820 148
Resistance in
Outdoor temperature sensor
600
Connection
580
Check sensor
1. Remove plug !.
560
2. Check the sensor resistance at
terminals 1 and 2 of the plug.
540
Outdoor
temperature in
ºC / ºF
Resistance
in Ω
520
–10 / 14
0 / 32
20 / 68
480
500
546
500
3. Disconnect cores from the sensor,
if actual values deviate severely from
the curve, repeat the sensor
measurement and compare with
the actual temperature.
480
460
4. Depending on the result, replace
cable or outdoor temperature
sensor.
440
420
400
-40
-40
5. Scan actual temperature.
-30
-22
-20
-4
-10
14
0
32
10
50
20
68
5285 941 v.1.5
Outdoor temperature in ºC / ºF
30
86
Specification
Protection:
IP 43
Permissible ambient temperature
during operation, storage and
transport:
–40 to +70ºC
–40 to 158ºF
99
Additional information
System components
(continued)
Outdoor temperature sensor
The outdoor temperature sensor should be mounted 2 to 2.5 metres / 6.5 to 8 ft
above ground level on the north or north-west facing wall of the building. In the
case of multi-storey buildings, it should be mounted in the upper half of the
second storey.
Make sure that the sensor is not located over windows, doors and air vents,
nor immediately beneath a balcony or guttering.
Do not paint over the outdoor temperature sensor housing.
1. Remove the cap.
5.
1.
3.
2. Mount the bottom part of the
sensor housing.
3. Pull the sensor wire through the
opening in the terminal
compartment and through the
strain relief provided.
4. Connect the wires to the
terminals.
4.
5. Place the cap over the outdoor
temperature sensor.
2.
WARNING
A
When extending wire, there is the
possibility of exposure to electromagnetic
interference. Avoid running wires
beside or near high voltage 120/240
VAC conductors. If proximity to high
voltage conductors cannot be avoided,
use stranded, twisted pair or shield
design wire. Ensure that only one end
of the shielding is grounded.
1
100
5285 941 v.1.5
A Outdoor temperature sensor
Additional information
System components
(continued)
Boiler temperature sensor, Part No. 7450 632 and DHW tank temperature sensor, Part No. 7450 633
760
Electrical connection
See page 38.
740
Check the sensor
1. Disconnect plug § / % in the
terminal compartment.
720
2. Measure resistance of sensor at
terminals ”1” and ”2” of the plug
or ”2” and ”3” (if a second DHW
tank temperature sensor is
connected).
700
680
660
640
620
Resistance in Ω
Resistance
in Ω
40 / 104
50 / 122
60 / 140
578
597
616
3. Compare the value measured with
the actual temperature.
If the value differs significantly,
check installation and, if
necessary, replace sensor.
600
580
560
540
400
0
32
20
68
40
104
60
140
80
176
100
212
120
248
140
284
Boiler water/DHW tank temperature in °C / °F
Extension kit for heating circuit with mixing valve, Part No. 7183 288
5285 941 v.1.5
Boiler water/
DHW tank
temperature
in °C / °F
Technical data
Degree of
protection:
IP 32
Ambient
temperature
During operation:
– boiler temperature sensor:
0 to + 130°C
32 to + 266°F
– DHW tank temperature sensor:
0 to + 90°C
32 to + 194°F
During storage and transport:
–20 to + 70°C
- 4 to + 158°F
Accessory
Comprising supply temperature sensor as contact sensor for measuring the
supply temperature and mixing valve motor, with 4 m / 13 ft long connecting
cable and plug-in plug for connecting the heating circuit pump.
101
Additional information
System components
(continued)
Strap-on temperature sensor and immersion temperature sensor
For measuring the supply temperature.
Electrical connection
The sensor is inserted in socket ?
on the control unit.
Check the sensor
1. Disconnect plug ? in the
terminal compartment.
2
2. Measure resistance of sensor at
terminal ”2” of the plug.
2
Supply
temperature
in °C / °F
Resistance
in Ω
30 / 86
40 / 104
60 / 140
569
592
643
3. Compare the value measured with
the current temperature. If the
value differs significantly, check
installation and, if necessary,
replace sensor.
740
Technical data
Degree of protection: IP 32
Ambient temperature
during operation:
0 to + 100°C
32 to + 212°F
during storage and transport:
–20 to + 70°C
- 4 to + 158°F
720
700
680
660
Resistance in Ω
640
620
600
580
540
20
68
30
86
40
104
50
122
60
140
70
158
Supply temperature in °C / °F
102
80
176
90 100
194 212
5285 941 v.1.5
560
Additional information
System components
(continued)
Strap-on temperature sensor and immersion temperature sensor
For measuring the return temperature.
Electrical connection
The sensor is inserted in socket
”17A” or ”17B” on the control unit.
17A or 17B
Check the sensor
1. Disconnect plug aJA or aJB in
the terminal compartment.
2. Measure resistance of sensor at
terminals ”1” and ”2” of the plug.
17A or 17B
Return
temperature
in °C / °F
Resistance
in Ω
30 / 86
40 / 104
60 / 140
569
592
643
3. Compare the value measured with
the current temperature. If the
value differs significantly, check
installation and, if necessary,
replace sensor.
740
Technical data
Degree of protection: IP 32
Ambient temperature
during operation:
0 to + 100°C
32 to + 212°F
during storage and transport:
–20 to + 70°C
- 4 to + 158°F
720
700
680
660
Resistance in Ω
640
620
600
580
5285 941 v.1.5
560
540
20
68
30
86
40
104
50
122
60
140
70
158
80
176
90 100
194 212
Return temperature in °C / °F
103
Additional information
System components (VD2/VD2A/CT3 only)(continued)
Flue gas temperature sensor, Part No. 7450 630
Accessory
See page 48 for CM2 flue gas
temperature switch.
The sensor measures the flue gas
temperature and monitors the
selected limit value.
Electrical connection
The sensor is inserted in socket
”15” on the boiler control.
Check flue gas temperature sensor
1. Disconnect plug aG in the
terminal compartment of the
boiler control.
2. Measure resistance of sensor at
terminals ”1” and ”2” of the plug.
1020
980
Flue gas
temperature
in °C / °F
Resistance
in Ω
180 / 176
160 / 320
200 / 392
650
800
880
3. Compare the value measured
with the actual temperature. If
the value differs significantly,
check installation and, if
necessary, replace sensor.
940
900
860
Technical data
Degree of
protection:
IP 60
Ambient temperature
during operation:
–20 to + 600°C
32 to + 1112°F
during storage and transport:
–20 to + 70°C
–4 to + 158°F
Resistance in Ω
820
780
740
700
660
620
580
500
0
32
40
80 120 160 200 240
104 176 248 360 392 464
Flue gas temperature in °C / °F
104
280
536
5285 941 v.1.5
540
Additional information
System components
(continued)
Installation examples
5285 941 v.1.5
In the as delivered condition, the electrical connections of
the mixing valve motor are as required for the following
installation examples; do not change.
A Marker notch
HR Heating return
HV Heating supply
The electrical connections of the mixing valve motor must
be changed for the following installation examples.
KR Boiler return
KV Boiler supply
105
Additional information
System components
(continued)
Vitotrol 200, Part No.7133 378
(with integral room temperature sensor for room temperature feed-back in conjunction with a mixing valve circuit)
Setting of:
Day temperature
Heating program
Economy and party mode
Function changes can be made via coding addresses A0, b0 to b9, C0 to C2, E1 and E2 (see coding overview).
Connection
2-wire cable 50m / 164 ft
Room temperature sensor connection
Two-core cable, max. 35 m / 115 ft.
length with a cross-section of 1.5 mm2
(AWG 16) copper
A
13b
145
9
B
C
5285 941 v.1.5
A Wall mounting base for Vitotrol 200
B To control unit
C Separate room temperature sensor
106
Additional information
System components
Remote control
(continued)
(continued)
ON
S6
D
1234
D Printed Circuit Board DIP switches
(rear of the top casing)
Remote control
affects
DIP switch
setting
System circuit A1
(Heating circuit
selection
button !)
Factory setting
Specification
Power supply via 145 KM BUS.
Safety class:
III
Protection:
IP 30
Permiss. ambient
temperature
During operation:
0 to +40°C
32 to + 104°F
In storage and transport:
–20 to +65°C
–4 to +149°C
Set room temperature
setting range:
10 to 30°C
50 to 96°F
adjustable between
3 to 23°C
37 to 73°F
or
17 to 37°C
63 to 99°F
via coding address E1
Setting of the reduced set room
temperature at the control unit.
Mixing valve
circuit M2
(Heating circuit
selection
button ?)
Mixing valve
circuit M3
(Heating circuit
selection
button §)
5285 941 v.1.5
When connecting a separate room
temperature sensor, set DIP
switch S6.3 to ON.
107
Additional information
System components
(continued)
Vitotrol 300, Part No. 7134 452
(with integral room temperature sensor for room temperature feed-back in conjunction with a mixing valve circuit)
Setting of:
Normal and reduced temperature
Domestic hot water temperature
Heating program
Holiday program
Switching times
Economy and party mode
Function changes can be made via coding addresses A0, b0 to b9, C0 to C2, E1 and E2 (see coding overview).
Connection
2-wire cable 50 m / 164 ft
A
Room temperature sensor connection
Two-core cable, max. 35 m / 115 ft.
length with a cross-section of 1.5 mm2
(AWG 16) copper.
13b
145
9
B
C
5285 941 v.1.5
A Wall mounting base for Vitotrol 300
B To the control unit
C Separate room temperature sensor
108
Additional information
System components
(continued)
Remote control (continued)
D
D Printed Circuit Board DIP switches
(rear of the top casing)
Remote control
affects
DIP switch
setting
System circuit A1
(Heating circuit
selection
button !)
Factory setting
Mixing valve
circuit M2
(Heating circuit
selection
button ?)
Mixing valve
circuit M3
(Heating circuit
selection
button §)
Specification
Power supply via 145 KM BUS.
Safety class:
III
Protection:
IP 30
Permiss. ambient
temperature
In use:
0 to +40°C
32 to 104°F
In storage and transport:
–20 to +65°C
–4 to +149°F
Setting range for
Normal set room temp:
10 to 30°C;
50 to +86°F
adjustable between
3 to 23°C
37 to 73°C
or
17 to 37°C
63 to 97°F
via coding address E1
Reduced set room temp:
3 to 37°C
37 to 97°F
Battery type:
Use alkaline
manganese
batteries
type MICROLR03 (AAA) which
do not contain
pollutants
When connecting a separate room
temperature sensor, set DIP
switch S30.3 to ON.
5285 941 v.1.5
S30
109
Additional information
System components
(continued)
Connecting several remote control units
When connecting several remote controls to the control unit, install a terminal box on site.
Version 1
C
D
max.
15 m / 50 ft
E
max.
15 m / 50 ft
max.
15 m / 50 ft
B
A
145
On-site connection via terminal box:
Connect in accordance with the
diagram.
The total length of all KM BUS cables
should be limited to 50 m / 164 ft.
5285 941 v.1.5
A To control unit
B Terminal box (on site)
C Vitotrol 1
D Vitotrol 2
E Vitotrol 3
110
Additional information
System components
(continued)
Version 2
max. 15 m / 50 ft
C
max. 15 m / 50 ft
max.
D
15 m / 50 ft
E
F
B
145
A
If several remote control units and
additional KM BUS participants are
connected, make the connections via
a terminal box (on-site) as shown in
the diagram.
The total length of all KM BUS cables
should be limited to 50 m / 164 ft.
5285 941 v.1.5
A To control unit
B Terminal box (on site)
C Vitotrol 1
D Vitotrol 2
E Vitotrol 3
F Further BUS participants
111
Additional information
System components
(continued)
Room temperature sensor, Part No. 7133 379
Accessory
1 2
The room temperature sensor
serves to measure the room
temperature where the remote
control cannot be located in a
suitable position.
3 4
Technical data
Degree of protection: IP 30
Ambient
temperature
During operation:
0 to + 40°C
32 to + 104°F
During storage
and transport:
–20 to + 65°C
–4 to + 149°F
B
Electrical connection
Two-core cable, max. 35 m / 115 ft
long, with a conductor cross-section
of 1.5 mm2 copper.
145
C
A
A To control unit
B Remote control
C Room temperature sensor
Check room temperature sensor
590
1. Disconnect the wires at the
sensor terminals.
580
2. Measure the resistance of the
sensor at terminals ”9” and ”13b”.
570
560
540
Room
temperature
in °C / °F
Resistance
in Ω
10 / 50
15 / 59
25 / 77
522
534
557
530
3. Compare the value measured
with the current temperature
(to scan: see page 74).
If the value differs significantly,
check installation and, if
necessary, replace sensor.
520
510
500
0
32
5
41
10
50
15
59
20
68
25
77
30
86
Room temperature in °C / °F
35
95
40
104
5285 941 v.1.5
Resistance in Ω
550
112
Set coding switch 3 on the rear of
the top part of the remote control
case to ”ON” (see page 107).
Additional information
System components (continued)
Input Module 0 to 10 V, Part No. 7134 561
From software version 7, the Input Module can be connected (software version via scan 2: 1st digit, display ≥7).
24V
5V
For external control of the boiler/supply temperature via a 0 to 10VDC signal
10 to 100°C or 30 to 120°C
(50 to 212°F or 86 to 248°F)
or
to signal reduced mode and regulate a heating circuit pump to a lower speed.
Electronics
B
F1
50mA
(slow)
ON
OFF 1 2 3 4
L1
N
S Ö P
1 2 3
1 2 3
40
_ +
120 VAC
A
fÖ
aVF
aVG
aBJ
157
Power connection
0 to 10VDC input
KM BUS to control unit
Potential free output contact
145
A Power supply
(provide disconnect if required by
code)
B DIP switch (see table)
Function
DIP switch
1 to 3:
1:
2:
3:
4:
4:
144
OFF
ON
ON
ON
ON
OFF
Switch for pre-set value
Reduced mode – system circuit A1
Reduced mode – mixing valve circuit M2
Reduced mode – mixing valve circuit M3
Pre-set value default 10 to 100°C / 50 to 212°F
Pre-set value default 30 to 120°C / 86 to 248°F
5285 941 v.1.5
Please note:
Amongst switches 1 to 3, only one switch may be set to ON.
113
Additional information
Coding 1
Call up coding level 1
Only those coding addresses are displayed which correspond to the system type
and equipment concerned and can be changed accordingly.
Coding 1
Cod. 1
System type
Cod. 1
1. Press 9 and w simultaneously for
approx. 2 seconds.
Access coding level 1.
2. Call up the required coding address
or
button;
with the
to confirm.
press
Address flashes.
3. Change the value with the
button;
press
to confirm.
”Accepted” appears briefly in the
display, then the address flashes
again. Further addresses can now be
selected with the
or
button.
or
Value flashes.
Exit coding level 1.
4. Press 9 and w simultaneously for
approx. 1 second.
Codings
Function
Coding as per factory setting
Possible change
System type
114
00: 1
System circuit A1,
without domestic hot water heating
00: 12
System circuit A1,
with domestic hot water heating
00: 13
Mixing valve circuit M2,
without domestic hot water heating
00: 14
Mixing valve circuit M2,
with domestic hot water heating
00: 15
System circuit A1 and mixing valve circuit
M2,
without domestic hot water heating
00: 16
System circuit A1 and mixing valve circuit
M2,
with domestic hot water heating
00: 17
Mixing valve circuits M2 and M3,
without domestic hot water heating
00: 18
Mixing valve circuits M2 and M3,
with domestic hot water heating
00: 19
System circuit A1 and mixing valve circuits
M2 and M3, without domestic hot water
heating
00: 10
System circuit A1 and mixing valve circuits
M2 and M3, with domestic hot water
heating
5285 941 v.1.5
Address: Value
Additional information
Coding 1
(continued)
Codings (continued)
Function
Coding as per factory setting
Possible change
Address: Value
Burner type
02: 0
02: 2
Two-stage
Modulating
Gas/oil-fired
03: 0
Gas-fired operation
operation
Burner(modulating). 05: 70
Burner curve
03: 1
Oil-fired operation
(coding cannot be reset)
Burner curve - linear
05: 1
to
05: 99
Burner curve not linear
(PT: Pmax) x 100%
PT in kW: partial output at 1/3 of run time
Pmax in kW: maximum output
Max. boiler temp.
06: 87
Max. boiler water temperature limited to
87°C / 189°F
06: 20
to
06: 127
Maximum boiler water temperature limit
variable between 20 and 127°C / 68 and
261°F
General
40: 125
Operating time of 3-way mixing valve or
mixing valve motor in conjunction with
return temperature control
40: 5
to
40: 199
Operating time variable
from 5 to 199 seconds
Participant number
77: 1
LON participant number
77: 1
to
77: 99
LON participant number
selectable from 1 to 99
Please note:
Each number may be assigned once only.
DHW priority
A1/M2/M3
A2: 2
With DHW tank priority control
A2: 0
Without DHW tank priority control
A2: 1
A2: 3
to
A2: 15
Without function
Summer energy
saving function
A1/M2/M3
A5: 5
With heating circuit pump logic function
(HPL function)
A5: 0
Without heating circuit pump logic function
(HPL function)
Min. supply temp.
A1/M2/M3
C5: 20
Electronic minimum supply temperature
limit 20°C / 68°F
C5: 1
Electronic minimum supply temperature
to
limit variable between 1 and 127°C / 34
C5: 127 and 127°F
Max. supply temp.
A1/M2/M3
C6: 75
Maximum supply temperature limited to
75°C / 167°F
C6: 10
Maximum supply temperature limit variable
to
between 10 and 127°C / 50 and 127°F
C6 :127
05: 0
The factory setting is determined by the boiler coding card.
This setting is matched to the Vitocrossal.
5285 941 v.1.5
*1
*2
02: 1
Two-stage
115
Additional information
Coding 2
Call up coding level 2
The overview lists all possible coding addresses.
However, only those coding addresses are displayed which correspond to the
system type and equipment concerned and can be changed accordingly.
System type
Cod. 00
The coding addresses are structured in
accordance with the graphic on the
left.
Please note:
In the case of systems with one
system circuit and two mixing
valve circuits, the possible coding
addresses ”A0” to ”FF” for
system circuit A1 are run through
first, then those for the mixing
valve circuits M2 and M3.
1. Press w and rw simultaneously
for approx. 2 seconds;
to confirm.
press
Access coding level 2.
2. Call up the required coding address
with the
or
button;
press
to confirm.
Coding address flashes.
3. Change the value with the
button;
press
to confirm.
”Accepted” appears briefly in the
display, then the coding address
flashes again.
Further addresses can now be
or
button.
selected with the
Boiler / Burner
Cod. 02 to 33
Domestic hot water
Cod. 55 to 75
General
Cod. 7F to 95
System circuit A1
Cod. A0 to FF
Mixing valve circuit M2
Cod. A0 to FF
Coding 2
Cod. 2
System type
Cod. 2
or
4. Press w and rw simultaneously
for approx. 1 second.
116
Exit coding level 2.
5285 941 v.1.5
Mixing valve circuit M3
Cod. A0 to FF
Additional information
Coding 2
(continued)
Reset codings to factory settings
Coding 2
Cod. 2
1. Press w and rw simultaneously
for approx. 2 seconds.
2. Press D.
to confirm ”Factory
Press
setting? Yes”.
Access coding level 2.
”Factory setting? Yes” or ”Factory
setting? No” can be selected with
the
or
button.
Overview of all codings
Coding as per Function
factory setting
Address: Value
00: 1
System
type
System circuit A1
without domestic hot water
heating
New coding
Address:
Value
Possible change
00: 12
System circuit A1
with domestic hot water heating
00: 13
Mixing valve circuit M2
without domestic hot water heating
00: 14
Mixing valve circuit M2
with domestic hot water heating
00: 15
System circuit A1 and mixing valve circuit M2
without domestic hot water heating
00: 16
System circuit A1 and mixing valve circuit M2
with domestic hot water heating
00: 17
Mixing valve circuits M2 and M3
without domestic hot water heating
00: 18
Mixing valve circuits M2 and M3
with domestic hot water heating
00: 19
System circuit A1 and mixing valve circuits M2
and M3 without domestic hot water heating
00: 10
System circuit A1 and mixing valve circuits M2
and M3 with domestic hot water heating
Boiler/
burner
Operation with two-stage
burner
02: 0
Operation with single-stage burner
02: 2
Operation with modulating burner
03: 0
Boiler/
burner
Gas-fired operation
03: 1
Oil-fired operation
(coding cannot be reset)
5285 941 v.1.5
02: 1
117
Additional information
Coding 2
(continued)
Overview of all codings (continued)
Function
04: *1
Boiler/
burner
Switching differential
New coding
Address:
Value
Possible change
04: 0
Switching differential 4°C / 7°F
Burner
Coding as per
factory setting
Address:
Value
ON
Time
OFF
Setpoint
Low
heat demand
Medium
heat demand
High
heat demand
Switching differential heat demandcontrolled
ERB50 function
Values from 6 to 12°C / 11 to 22°F are
set, depending on the heat demand.
Burner
04: 1
ON
Time
OFF
Setpoint
Low
heat demand
Medium
heat demand
High
heat demand
04: 2
Burner
ERB80 function
Values from 6 to 20°C / 11 to 36°F are
set, depending on the heat demand.
ON
Time
OFF
Setpoint
Low
heat demand
Medium
heat demand
High
heat demand
The heat demand-controlled switching
differential takes into account the boiler
load. The switching differential, i.e. the
burner operating time, is varied in relation
to the actual heat demand.
06: 87
*1
118
Boiler/
burner
(mod.)
Boiler/
burner
Burner curve
Max. limit of boiler water
temperature set to 95°C /
203°F
The factory setting is determined by the boiler coding card.
05: 1
to
05: 99
06: 20
to
06: 127
Burner curve not linear:
Partial output in kW (at g of the
Operating time of the
actuating drive)
Max. output in kW
= Partial output in %
·x 100 %
Maximum boiler water temperature limit
variable between 20 and 127°C / 68 and
261°F
5285 941 v.1.5
05: 70
Additional information
Coding 2 (continued)
Overview of all codings (continued)
Coding as per
factory setting
Address:
Value
Function
New coding
Address:
Value
Possible change
08: *1
Boiler/
burner
Max. output of burner in kW
08: 1
to
08: 99
Maximum output variable
from 1 to 99 kW;
1 increment = 1 kW
09: *1
Boiler/
burner
Max. output of burner in kW
09: 1
to
09: 199
Maximum output variable
from 1 to 19900 kW;
1 increment = 100 kW
0A: *1
Boiler/
burner
Basic output of burner in %
0A: 0
to
0A: 100
Basic output in kW
x100% =
Max. output in kW
Basic output in %
0b: 0
Boiler
Boiler protection when boiler
released
0b: 1
to
0b: 98
Boiler protection is switched off after
1 to 98 hours without request
0b: 99
Boiler protection at all times
0C: 0
Boiler
Without function
0C: 1
Continuous return temperature control
0d: 1
Boiler
With Therm-Control,
effective for mixing valve of
heating circuits
0d: 0
Without Therm-Control
0d: 2
Without function
Boiler/
burner
Switch-off differential
The burner is switched off
when the boiler water
temperature rises above the
desired value
13: 0
Without switch-off differential
13: 1
to
13: 20
Switch-off differential variable from
1 to 20°C/ 2 to 36°F
14: *1
Burner
Minimum operating time
14: 1
to
14: 15
Minimum operating time variable from 1 to 15
minutes
15: 10*2
Boiler/
burner
(mod.)
Operating time of actuating
drive 10 seconds
15: 5
to
15: 199
Operating time variable
from 5 to 199 seconds
16: *1
(Mod.)
burner
Mod. burner offset in K
Temporary reduction of the
boiler set-point value after
burner start
16: 0
to
16: 15
Offset during optimized start-up
adjustable from 0 to 15°C / 0 to 27°F
1A: *1
(Mod.)
burner
Optimized start-up in
minutes
1A: 0
to
1A: 60
Duration of optimized start-up
adjustable from 0 to 60 minutes
1b: 60
Burner
Time from ignition of burner
to start of control 60
seconds
1b: 0
to
1b: 199
Control delay adjustable
from 0 to 199 seconds
5285 941 v.1.5
13: *1
119
Additional information
Coding 2
(continued)
Coding as per Function2.4
factory setting
Address: Value
New coding
Address:
Value
Possible change
1C: 120
Burner
Start delay 120 seconds
(only selectable if no
operating signal ”B4” is
available at plug fA of the
burner)
1C: 1
to
1C: 199
Start delay adjustable
from 1 to 199 seconds
1F: 0
Boiler
No monitoring of flue gas
temperature
1F: 1
to
1F: 50
With flue gas temperature sensor connected:
When the flue gas temperature exceeds the
preselected limit value (selectable in the
range from 10 to 500°C / 50 to 932°F),
”Service” is displayed; 1 increment = 10°C /
50°F
21: 0
Boiler/
burner
No service display for burner
21: 1
to
21: 100
The number of burner hours run before the
”Service” display appears can be set between
100 and 10000 hours;
1 increment = 100 hours
23: 0
Boiler/
burner
No time interval for burner
maintenance
23: 1
to
23: 24
Time interval variable between 1 and 24 months
24: 0
Boiler/
burner
No ”Service” display
24: 1
The ”Service” display appears (address is set
automatically and must be reset manually after
maintenance has been carried out)
26: 0
Boiler/
burner
(2-stage)
Fuel consumption of burner
(1st stage);
not metered if ”26: 0” and
”27: 0” are coded
26: 1
to
26: 99
Input from 0.1 to 9.9;
1 increment = 10 litres or gallons/hour
27: 0
Boiler/
burner
(2-stage)
Fuel consumption of burner
(1st stage);
not metered if ”26: 0” and
”27: 0” are coded
27: 1
to
27: 199
Input from 10 to 1990;
1 increment = 10 litres or gallons/hour
28: 0
Boiler/
burner
No intermittent ignition of
burner
28: 1
The burner is automatically switched on for 30
seconds after 5 hours
29: 0
Boiler/
burner
Fuel consumption of burner
(2nd stage);
not metered if ”29: 0” and
”2A: 0” are coded
29: 1
to
29: 99
Input from 0.1 to 9.9;
1 increment = 0.1 litre or gallon/hour
2A: 0
Boiler/
burner
Fuel consumption of burner
(2nd stage);
not metered if ”29: 0” and
”2A: 0” are coded
2A: 1
to
2A: 199
Input from 10 to 1990;
1 increment = 10 litres or gallons/hour
2d: 0
Boiler
Shunt pump ON only when
requested
2d: 1
Shunt pump ON continuously
40: 125
General
Operating time, 3-way mixing 40: 5
valve or mixing valve motor
to
in conjunction with return
40: 199
temperature control
120
Operating time adjustable from 5 to 199
seconds
5285 941 v.1.5
Overview of all codings (continued)
Additional information
Coding 2
(continued)
Overview of all codings (continued)
Coding as per Function
factory setting
Address: Value
Possible change
4A: 0
General
Plug aJA not installed
4A: 1
Plug aJA installed (e.g. temperature sensor of
Therm-Control);
automatically recognized
4b: 0
General
Plug aJB not installed
4b: 1
Plug aJB installed (e.g. temperature sensor
T2); automatically recognized
4C: 0
General
Connection at plug sÖA1:
Heating circuit pump
4C: 1
Primary pump of DHW tank loading system
4C: 2
Switch contact of Therm-Control
4C: 3
Circulation pump of flue gas/water heat
exchanger
4d: 2
Boiler circuit pump
4d: 1
General
Connection at plug sL:
Shunt pump
4E: 0
General
Connection at plug gS:
4E: 1
3-way mixing valve for return
temperature control
4F: 5
General
Shunt pump with 5 minutes
run-on time
4F: 0
Shunt pump without run-on time
4F: 1
to
4F: 60
Run-on time adjustable from 1 to 60 minutes
Without solar control
54: 1
With Vitosolic 100; automatically recognized
54: 2
With Vitosolic 200; automatically recognized
55: 1
Optimized DHW tank heating active
(takes into account the rate at which the DHW
tank temperature increases during domestic hot
water heating)
55: 2
DHW tank temperature control with 2 DHW
tank temperature sensors
55: 3
DHW tank temperature control of DHW tank
loading system
54: 0
55: 0
5285 941 v.1.5
New coding
Address:
Value
General
DHW
DHW tank heating,
differential +/- 2.5 K
3-way valve of DHW tank loading system
56: 0
DHW
Setting range of domestic
hot water temperature 10 to
60°C / 50 to 140°F
56: 1
Setting range of domestic hot water
temperature 10 to 95°C / 50 to 203°F
¨ Safety instruction!
Observe max. DHW temperature
Adjust adjustable high limit ”R”
58: 0
DHW
Without additional function
for domestic hot water
heating
58: 1
to
58: 95
Input of a 2nd desired DHW temperature value;
variable between 1 and 95°C / 34 and 203°F
(note coding address ”56”)
Please note:
The DHW tank is heated to the 2nd set-point
value during the 4th activation period for
domestic hot water heating (see operating
instructions regarding settings).
121
Additional information
Coding 2
(continued)
Coding as per
Function
factory setting
Address: Value
New coding
Address:
Value
Possible change
59: 0
DHW
DHW tank heating:
Switch-on point
– 2.5°C / 4.5°F
Switch-off point
+ 2.5°C / 4.5°F
59: 1
to
59: 10
Switch-on point variable between 1 and 10°C
/ 34 and 18°F below setpoint value
5A: 0
DHW
Without function
5A: 1
Supply temperature request of DHW tank is
the maximum value of the system
60: 20
DHW
When domestic hot water is
being heated, the boiler
water temperature is a
maximum of 20°C / 36°F
higher than the desired
domestic hot water
temperature
60: 10
to
60: 50
Differential between boiler water temperature
and desired DHW temperature adjustable
between 10 and 50°C / 18 and 90°F
61: 1
DHW
Circulation pump switches
on immediately
61: 0
The circulation pump is switched on as a
function of the boiler temperature
62: 10
DHW
Circulation pump with
run-on time of 10 minutes
62: 0
Circulation pump without run-on time
62: 1
to
62: 15
Run-on time variable from 1 to 15 minutes
During the party mode:
Continuous domestic hot
water heating and DHW
circulation pump ON
64: 0
No domestic hot water heating, DHW
circulation pump OFF
64: 1
Domestic hot water heating and DHW
circulation pump according to preset time
program
Input of DHW temperature
set-point value on the
programming unit of the
control unit and all Vitotrol
300 remote controls
installed
66: 0
Only on the programming unit of the control
unit
66: 1
On the programming unit of the control unit
and on the remote control for system circuit
A1
66: 2
On the programming unit of the control unit
and on the remote control for mixing valve
circuit M2
66: 3
On the programming unit of the control unit
and on the remote control for mixing valve
circuit M3
66: 5
Only on the remote control for system circuit
A1
66: 6
Only on the remote control for mixing valve
circuit M2
66: 7
Only on the remote control for mixing valve
circuit M3
64: 2
66: 4
122
DHW
DHW
5285 941 v.1.5
Overview of all codings (continued)
Additional information
Coding 2 (continued)
Overview of all codings (continued)
Coding as per Function
factory setting
Address: Value
67: 40
Possible change
Address:
Value
With Vitosolic:
Third DHW temperature
set-point 40°C/ 104°F
67: 0
Without third DHW temperature set-point
67: 1
to
67: 95
Setting of a third DHW temperature set-point.
Adjustable from 1 to 95°C/ 34 to 203°F as
per coding address “56”
68: 8
DHW
In conjunction with 2 DHW
tank temperature sensors
with the DHW tank loading
system:
Switch-off point of DHW
tank heating at set-point
value x 0.8
68: 2
to
68: 10
Factor adjustable from 0.2 to 1
per 1 increment = 0.1
69: 7
DHW
In conjunction with 2 DHW
tank temperature sensors
with the DHW tank loading
system:
Switch-off point of DHW
tank heating at set-point
value x 0.7
69: 1
to
69: 9
Factor adjustable from 0.1 to 0.9
per 1 increment = 0.1
70: 0
DHW
DHW circulation pump ON
according to preset time
program when DHW heating
is released
70: 1
Output of DHW circulation pump dependent
only on preset time program
71: 0
DHW
DHW circulation pump ON
according to preset time
program
71: 1
DHW circulation pump OFF during domestic
hot water heating to the 1st set-point value
71: 2
DHW circulation pump ON during domestic hot
water heating to the 1st set-point value
DHW circulation pump ON
according to preset time
program
72: 1
DHW circulation pump OFF during domestic
hot water heating to the 2nd set-point value
72: 2
DHW circulation pump ON during domestic hot
water heating to the 2nd set-point value
DHW circulation pump ON
according to preset time
program
73: 1
to
73: 6
During the time program for the DHW
circulation pump ON for 5 minutes once per
hour to ON for 5 minutes 6 times per hour
73: 7
DHW circulation pump ON continuously
75: 1
DHW circulation pump OFF during energy
saving mode
72: 0
73: 0
5285 941 v.1.5
DHW
New coding
DHW
DHW
75: 0
DHW
DHW circulation pump ON
during energy saving mode
according to preset time
program
76: 0
General
Without LON communication 76: 1
module
With LON communication module; recognized
immediately
77: 1
General
LON participant number
LON participant number selectable from 1 to
99
Please note:
Each number may be assigned once only.
77: 1
to
77: 99
123
Additional information
Coding 2
(continued)
Overview of all codings (continued)
Coding as per Function
factory
setting
Address: Value
New coding
Possible change
78: 1
General
LON communication
released
78: 0
LON communication blocked
79: 1
General
Control unit is fault manager
79: 0
Control unit is not fault manager
7A: 0
General
Without centralized
operation of the heating
circuits
7A: 1
With centralized operation of system circuit A1
7A: 2
With centralized operation of mixing valve
circuit M2
7A: 3
With centralized operation of mixing valve
circuit M3
7b: 0
General
Do not transmit time via
LON BUS
7b: 1
Transmit time via LON BUS
7F: 1
General
Single occupancy house
7F: 0
Multi-occupancy house
80: 6
General
With 5 seconds time delay
for fault message
80: 0
Without time delay
80: 2
to
80: 199
Time delay adjustable between
10 and 995 seconds;
1 increment = 5 seconds
Automatic resetting to
summer/winter time
Please note:
Codings ”82” to ”87” are
only possible if coding ”81 :
1” is set.
81: 0
Manual resetting to summer/winter time
81: 2
Use of radio clock module automatically
recognized
81: 3
Receive time from LON
81: 1
General
82: 3
General
Start of summer time:
March
82: 1
to
82: 12
January
to
December
83: 5
General
Start of summer time:
last week of month
83: 1
to
83: 4
Week 1
to
Week 4 of the selected month
84: 7
General
Start of summer time:
last day of week
(Sunday)
84: 1
to
84: 7
Monday
to
Sunday
85: 10
General
Start of winter time:
October
85: 1
to
85: 12
January
to
December
86: 5
General
Start of winter time:
last week of month
86: 1
to
86: 4
Week 1
to
Week 4 of the selected month
87: 7
General
Start of winter time:
last day of week
(Sunday)
87: 1
to
87: 7
Monday
to
Sunday
124
5285 941 v.1.5
Address:
Value
Additional information
Coding 2 (continued)
Overview of all codings (continued)
5285 941 v.1.5
Coding as per Function
factory setting
Address: Value
New coding
Address:
Value
Possible change
88: 0
General
Temperatures displayed in
Celsius
88: 1
Temperatures displayed in Fahrenheit
89: 1
General
Automatic participant
recognition on KM-BUS
89: 0
No participant reognition
8A: 175
General
Display of codings which
can be set for the system
type concerned
8A: 176
All codings displayed regardless of system type
and equipment installed
8E: 4
General
8E: 0
Display and
acknowledgment of faults:
on the programming unit and 8E: 1
all Vitotrol remote controls
installed
Only on the programming unit of the control
unit
8E: 2
On the programming unit of the control unit
and on the remote control for mixing valve
circuit M2
8E: 3
On the programming unit of the control unit
and on the remote control for mixing valve
circuit M3
On the programming unit of the control unit
and on the remote control for system circuit
A1
90: 128
General
Time constant for
calculating the outdoor
temperature change
21.3 hours
90: 0
to
90: 199
Fast matching (lower values) or slow matching
(higher values) of the supply temperature to
the change in the outdoor temperature
according to the selected value;
1 increment = 10 minutes
91: 0
General
Without changeover of the
heating program
91: 1
91: 2
With changeover of the heating program
(connection via plug aVD):
Changeover effective for: System circuit A1
Mixing valve circuit M2
91: 3
System circuit A1 and mixing valve circuit M2
91: 4
Mixing valve circuit M3
91: 5
System circuit A1 and mixing valve circuit M3
91: 6
Mixing valve circuits M2 and M3
91: 7
All heating circuits (A1, M2, M3)
93: 1
Central fault indication in emissions test
mode/service display effective for central fault
92: 165
General
Do not adjust!
Will only display if coding
address “8A: 176” is set
Central fault indication in
emissions test mode/service
display not effective for
central fault
93: 0
General
94: 0
General
Without plug-in adaptor for
external safety equipment
94: 1
With plug-in adaptor for external safety
equipment; recognized automatically
96: 1
General
With mixing valve extension
circuit board
96: 0
Without mixing valve extension circuit board
125
Additional information
Coding 2
(continued)
Coding as per Function
factory setting
Address: Value
97: 2
General
New coding
Address:
Value
Possible change
The outdoor temperature of
the sensor connected to the
control unit is transmitted
via the LON BUS to any
Vitotronic 200-H units
which may be connected
97: 0
Not transmitted to heating circuit controls
97: 1
The outdoor temperature is acepted by any
heating circuit controls which may be
connected
98: 1
General
Viessmann system number
(in conjunction with
monitoring of several
systems within one LON
BUS system)
98: 1
to
98: 5
System number selectable from 1 to 5
99: 0
General
Connection at terminals ”2”
and ”3” in plug aVD
(External disable/”Close
mixing valve” externally not
active)
99: 1
Contact effective for:
Without function
99: 2
”Close mixing valve”, mixing valve circuit M2
99: 3
Without function
99: 4
”Close mixing valve”, mixing valve circuit M3
99: 5
Without function
99: 6
”Close mixing valve”, mixing valve circuits M2
and M3
99: 7
Without function
99: 8
External disable
99: 9
Without function
99: 10
External disable and ”Close
mixing valve”, mixing valve circuit M2
99: 11
Without function
99: 12
External disable and ”Close
mixing valve”, mixing valve circuit M3
99: 13
Without function
99: 14
External disable and ”Close mixing valve”,
mixing valve circuits M2 and M3
99: 15
Without function
9A: 1
Contact effective for:
Without function
9A: 2
”Open mixing valve”, mixing valve circuit M2
9A: 3
Without function
9A: 4
”Open mixing valve”, mixing valve circuit M3
9A: 5
Without function
9A: 6
”Open mixing valve”, mixing valve circuits M2
and M3
9A: 7
Without function
9b: 0
Input aVH blocked
9b: 1
to
9b: 127
Desired supply temperature selectable from
1 to 127°C / 34 to 261°F
9A: 0
9b: 70
126
General
General
Connection at terminals ”1”
and ”2” in plug aVD
(”Open mixing valve”
externally not active)
Desired supply temperature
70 °C / 158 °F with
external request (input aVH)
5285 941 v.1.5
Overview of all codings (continued)
Additional information
Coding 2
(continued)
Overview of all codings (continued)
Coding as per Function
factory setting
Address: Value
9C: 20
Possible change
Monitoring of LON
participants
If a participant does not
answer back, default values
set within the control unit
are used for the first 20
minutes. The an error
message is transmitted
Without Input module 0-10V
9C: 0
No monitoring
9C: 1
to
9C: 60
Time selectable
from 1 to 60 minutes
9d: 0
General
9d: 1
With Input module; automatically recognized
9F: 8
General
Differential temperature 8 K
only in conjunction with
mixing valve circuit
05: 0
to
05: 40
Differential temperature selectable from 0 to
40 K
A0: 0
Boiler
circuit/
mixing
valve
circuit
Without remote control
A0: 1
With Vitotrol 200 remote control
A0: 2
With Vitotrol 300 remote control
Boiler
circuit/
mixing
valve
circuit
With DHW tank priority
control over heating circuit
pump and mixing valve
A2: 0
Without DHW tank priority control over heating
circuit pump and mixing valve
A2: 1*1
The mixing valve is closed and the heating
circuit pump is ON when the DHW tank is
being heated
A2: 3*1
to
A2: 15
Reduced DHW tank priority over mixing valve;
i.e. the heating circuit is supplied with a
reduced amount of heat
A2: 2
A3: 2
5285 941 v.1.5
General
New coding
Address:
Value
A4: 0
Boiler
circuit/
mixing
valve
circuit
Boiler
circuit/
mixing
valve
circuit
The heating circuit pump is
switched on at outdoor
temperatures below 1 °C /
34 °F.
The heating circuit pump is
switched off at outdoor
temperatures above 3 °C /
37 °F.
A3:
A3:
A3:
A3:
A3:
A3:
A3:
A3:
Safety instruction:
At settings below 1 °C / A3:
34°F there is a risk that A3:
A3:
piping outdside the
insulation of the building A3:
may freeze, e.g. pipes in .
.
the roof space, to the
garage,in radiator alcoves, .
A3:
etc. Pay particular
attention to the standby
mode, e.g. during holiday
periods.
With frost protection
–9
–8
–7
–6
–5
–4
–3
–2
–1
–0
–1
–2
15
A4: 1
Heating circuit pump
See conversion chart at back of manual for °F
ON at
OFF at
–10°C
–8°C
–19°C
–7°C
–18°C
–6°C
–17°C
–5°C
–16°C
–4°C
–15°C
–3°C
–14°C
–2°C
–13°C
–1°C
–12°C
–0°C
–11°C
–1°C
–10°C
–2°C
–11°C
–3°C
-1.
-1 .
-1.
-1 .
-1.
-1 .
-14°C
16°C
No frost protection.
Setting only possible when coding
”A3: –9” is set.
Please note:
See safety instruction above.
127
Additional information
Coding 2
(continued)
Coding as per Function
factory setting
Address: Value
A5: 5
Boiler
circuit/
mixing
valve
circuit
With the heating circuit
pump logic function (HPL
function), the heating circuit
pump is switched off when
the outdoor temperature
(OT) rises 1 K above the
desired room temperature
(RTdes).
OT > RTdes + 1 K
New coding
Address:
Value
Possible change
A5: 0
Without heating circuit pump logic function
(HPL function)
A5:
A5:
A5:
A5:
A5:
A5:
A5:
.
.
.
A5:
With heating circuit pump logic function
(HPL function):
The heating circuit pump is switched off if
OT > RTdes + 5 K
OT > RTdes + 4 K
OT > RTdes + 3 K
OT > RTdes + 2 K
OT > RTdes + 1 K
OT = RTdes
OT > RTdes –1 K
.
.
.
OT > RTdes –9 K
Automatic changeover from normal heating to
summer operation*1 at a variable setting value
from 5 to 35°C plus 1°C / 41 to 95°F plus
2°F at which the burner and heating circuit
pump are switched off and the mixing valve is
closed
1
2
3
4
5
6
7
15
A6: 36
Boiler
circuit/
mixing
valve
circuit
Automatic changeover from
normal heating to summer
operation not active
A6: 5
to
A6: 35
A7: 0
Mixing
valve
circuit
Without mixing valve energy
saving function
A7: 1
With mixing valve energy saving function
(extended heating circuit pump logic)
The heating circuit pump can be switched off
additionally when the mixing valve has been
closed for longer than 20 minutes.
The heating circuit pump is switched on again
When the mixing valve goes to its control
mode
After the DHW tank has been
heated (for 20 minutes)
When there is a risk of freezing
A9: 7
Boiler
circuit
With pump stoppage time:
Heating circuit pump logic
function with change of setpoint (through changing the operating mode or changes on the
”ts” selector knob or ”tm”)
A0: 0
Without pump stoppage time
A9: 1
to
A9: 15
With pump stoppage time
adjustable from 1 to 15
With output reduction via
temperature sensor aJA
AA: 0
Without output reduction
AA: 1
Without function
AA: 2
*1
128
Mixing
valve
circuit
Based on the damped outdoor temperature which is calculated from the current outdoor temperature and a time constant which takes
into account the cooling characteristics of an average building.
5285 941 v.1.5
Overview of all codings (continued)
Additional information
Coding 2 (continued)
Overview of all codings (continued)
Coding as per Function
factory setting
Address: Value
b0: 0*1
Boiler
circuit/
mixing
valve
circuit
In conjunction with remote
control:
Weather-compensated
operation in normal heating
mode and reduced operation
New coding
Address:
Value
Possible change
b0: 1
Weather-compensated operation in
normal heating mode and with room
temperature dependent control
switched on for reduced operation
b0: 2
Room temperature dependent control
switched on for normal heating
mode and weather-compensated
operation for reduced operation
b0: 3
Room temperature dependent control
switched on for normal heating
mode and for reduced operation
b1: 0*1
Boiler
circuit/
mixing
valve
circuit
In conjunction with remote
control:
Without pure room
temperature control
b1: 1
Heating circuit with room
temperature dependent control
b2: 8*1
Boiler
circuit/
mixing
valve
circuit
In conjunction with remote
control and for the heating
circuit, operation with room
temperature control must be
coded
Room influence factor: 8
In conjunction with remote
control and for the heating
circuit, operation with room
temperature control must be
coded
Basic value: 53°C /
b2: 0
Without room influence
b2: 1
to
b2: 31
Room influence factor adjustable
from 1 to 31
b3: 1
Basic value: 38°C
In conjunction with remote
control:
No room temperature
controlled heating circuit
pump logic function
b5: 1
Heating circuit pump OFF if
actual room temperature
(RTact) is 1 K higher than desired
room temperature (RTdes)
RTact > RTdes + 1 K
Heating circuit pump ON if
actual room temperature (RTact)
is 1 K lower than desired room
temperature (RTdes)
RTact < RTdes + 1 K
b3: 0*1
Boiler
circuit/
mixing
valve
circuit
b5: 0*1
Boiler
circuit/
mixing
valve
circuit
Change the coding for the system circuit only on boilers without a minimum temperature limit or for the heating circuit with mixing
valve if the remote control is effective for this heating circuit.
5285 941 v.1.5
*1
129
Additional information
Coding 2
(continued)
Overview of all codings (continued)
Coding as per Function
factory setting
Address: Value
b6: 0*1
In conjunction with remote
control in RS mode:
Without rapid heat-up/fast
setback
Possible change
b6: 1
With rapid heat-up/fast setback
Fast setback:
Only possible with weather-compensated
operation with the room temperature sensor
switched on or with pure room temperature
dependent control.
The desired room temperature
value must be reduced by at least 2 K by
Pressing the energy saving button ”S”
Switching over from normal
heating to reduced operation
Optimized switch-off.
Fast setback is ended when the desired room
temperature is reached.
Rapid heat-up:
Only possible with weather-compensated
operation with the room temperature sensor
switched on or with pure room temperature
dependent control.
The desired room temperature value must be
increased by at least 2 K by
Pressing the party button
Switching over from reduced operation to
normal heating
Optimized switch-on.
Rapid heat-up is ended when the desired
room temperature is reached.
With optimized switch-on time
(max. time shift 2 hours 30 min.)
Boiler
circuit/
mixing
valve
circuit
In conjunction with remote
control in RS mode:
Without learning optimized
switch-on time
b8: 10
Boiler
circuit/
mixing
valve
circuit
In conjunction with remote b8: 11
control in RS mode:
to
Heat-up gradient: 10
b8: 255
minutes/Kelvin
Heat-up gradient for optimized switch-on time
variable between 11 and 255 minutes/Kelvin
b9: 0*1
Boiler
circuit/
mixing
valve
circuit
Without learning optimized
switch-on time
With learning optimized switch-on time
b7: 1
b7: 2
b9: 1
With optimized switch-on time
(max. time shift 15 hours 50 min.)
5285 941 v.1.5
b7: 0
Boiler
circuit/
mixing
valve
circuit
New coding
Address:
Value
130
Additional information
Coding 2
(continued)
Overview of all codings (continued)
Coding as per
factory setting
Address:
Value
C0: 0*1
C1: 0*1
C2: 0*1
C3: 125
C4: 1
C5: 20
C6: 75
C8: 31
d5: 0
5285 941 v.1.5
E1: 1
Function
New coding
Address:
Value
Possible change
Boiler
circuit/
mixing
valve
circuit
In conjunction with remote C0: 1
control:
Without optimized switch-off
C0: 2
time
With optimized switch-off time (max. time
shift 1 hour)
Boiler
circuit/
mixing
valve
circuit
Boiler
circuit/
mixing
valve
circuit
Mixing
valve
circuit
Mixing
valve
circuit
In conjunction with remote C1: 1
control:
to
Without optimized switch-off C1: 12
time
With optimized switch-off time (max. time
shift from 10 to 120 minutes)
1 increment = 10 minutes
Without learning optimized
switch-off time
With learning optimized switch-off time
Boiler
circuit/
mixing
valve
circuit
Mixing
valve
circuit
Boiler
circuit/
mixing
valve
circuit
Boiler
circuit/
mixing
valve
circuit
Boiler
circuit/
mixing
valve
circuit
C2: 1
Operating time of
valve 125 seconds
With optimized switch-off time (max. time
shift 2 hours)
mixing C3:
to
C3:
Mixing valve circuit with C4:
4-way mixing valve
C4:
C4:
Electronic minimum supply
C5:
temperature limit 20°C /
to
68°F
C5:
10
Electronic maximum supply
temperature limit set to
75°C
In conjunction with remote
control:
Without limit on room
influence
C6:
to
C6:
C8:
to
C8:
10
Heating program switches
over to ”Continuous
operation” with reduced
room temperature
d5: 1
Heating program switches over to
”Continuous space heating” with normal
room temperature
In conjunction with remote
control:
Day setpoint value variable
from 10 to 30°C
E1: 0
Day setpoint value variable from
3 to 23°C
E1: 2
Day setpoint value variable from
17 to 37°C
255
0
2
3
1
Operating time adjustable from
10 to 255 seconds
Mixing valve circuit with 3-way
mixing valve
Special case 1
Special case 2
Electronic minimum limit variable between
1 and 127°C / 34 and 261°F
127
Electronic maximum limit variable between
1 and 127°C / 34 and 261°F
127
1
30
Limit on room influence variable from 1 to
30 K
131
Additional information
Coding 2 (continued)
Overview of all codings (continued)
Coding as per Function
factory setting
Address: Value
E2: 50
Boiler
circuit/
mixing
valve
circuit
F1: 0
Mixing
valve
circuit
In conjunction with remote
control:
No room correction value
Slab curing function not
active
New coding
Adress:
Value
E2: 0
to
E2: 49
E2: 51
to
E2: 99
F1: 1
to
F1: 4
Possible change
Room correction value negative
Room correction value positive
See DIN 4725-2.
The commissioning/service report to
be completed by the heating
contractor must contain the
following data regarding heating up:
Heat-up data for the
corresponding supply temperatures
Max. supply temperature reached
Operating status and outdoor
temperature on handing-over the
installation
Slab curing function selectable on
basis of four temperature/time
curves (see page 134).
Please note:
Refer to the data and instructions
provided by the floor slab
manufacturer.
F2: 8
Boiler
circuit
Time limit for party mode
8 hours
Temperature limit for
cancelling reduced mode
-5°C.
Note coding address “A3”
F2: 0
F2:
to
F2:
F8:
to
F8:
F8:
1
12
+10
-60
-61
Time limit for party mode variable
between 1 and 12 hours
Temperature limit adjustable from
+10 to -60°C
Function inactive
5285 941 v.1.5
F8:-5
Boiler
circuit
The function is resumed after a
power failure or after the control
unit is switched off.
When the slab curing function has
terminated or the address is reset
manually to 0, the ”rw” heating
program is switched on.
No time limit for party mode
132
Additional information
Coding 2 (continued)
Overview of all codings (continued)
Coding as per Function
factory setting
Address: Value
F9:-14
Boiler
circuit
FA: 20
Time required for raising the
supply temperature (see
coding address “FA”) 60
minutes
Possible change
FA: 0
to
FA: 50
Temperature adjustable from 0 to 50%
Fb: 0
to
Fb: 150
Time adjustable from 0 to 300 minutes;
1 increment = 2 minutes
Temperature limit adjustable from
+10 to -60°C
5285 941 v.1.5
Fb: 30
Boiler
circuit/
mixing
valve
circuit
Boiler
circuit/
mixing
valve
circuit
Temperature limit for raising
reduced room temperature
set-point -14°C.
Note coding address “A3”
Raising of the supply
temperature when switching
reduced to normal room
temperature by 20%
New coding
Adress:
Value
F9: +10
to
F9: -60
133
Additional information
Coding 2
(continued)
Overview of all codings (continued)
Slab curing function diagrams
Supply temperature
°C
Temperature/time curve 1 (F1:1)
Days
Supply temperature
°C
Temperature/time curve 2 (F1:2)
Days
Supply temperature
°C
Temperature/time curve 3 (F1: 3)
Days
Days
134
5285 941 v.1.5
Supply temperature
°C
Temperature/time curve 4 (F1:4)
Additional information
Wiring diagram
Overview
5285 941 v.1.5
A1 Mixing valve extension circuit
board
A2 Low-voltage motherboard
A3 120 V~ motherboard
A4 Electronics board for mixing
valve extension
A6 Programming unit
A7 Optolink/emissions test switch
board
A8 Electronics board
A9 Boiler coding card
A10 LON communication module
(accessory)
A11 Power supply unit board
A12 Boiler control section
135
Additional information
Wiring diagram
(continued)
136
5285 941 v.1.5
A
7
A10
A
5
A2
A6
A9
A8
A11
34-pole
Low-voltage motherboard
Additional information
Wiring diagram
(continued)
Low-voltage motherboard (continued)
!
§
%
aJA Temperature sensor of
Therm-Control
or
temperature sensor T1
aJB Temperature sensor T2
aVD Connection of external
equipment
aVG KM BUS participant (accessory)
aVH Connection of external
equipment
LON Connecting cable for data
transfer between the control
units (accessory)
S3 Emissions test switch ”S”
V1 Fault indicator (red)
V2 Operating status indicator (green)
5285 941 v.1.5
aG
Outdoor temperature
sensor/radio clock receiver
(accessory)
Boiler temperature sensor
DHW tank temperature
sensor/2nd DHW tank
temperature sensor with DHW
tank loading system (accessory)
Flue gas temperature sensor
(accessory)
137
Additional information
Wiring diagram
(continued)
138
5285 941 v.1.5
A3
A11
ON ON
floating
120 V~ motherboard
Additional information
Wiring diagram
(continued)
120 V~ motherboard (continued)
lÖ Burner (2nd stage/modulating)
aBÖ External equipment
a External safety equipment
(remove jumper when
connecting)
b External disable (remove
jumper when connecting)
c External burner switch-on
(1st stage)
aBA Safety circuit, potential free
aBH Mains connection for accessories
F1, F2 Fuse
F6
Fixed high limit ”E” 110°C
(99°C)
F7
Adjustable high limit ”R” 95°C
K1-K10 Relay
S1
Heating system on/off switch
”8”
S2
TEST button
5285 941 v.1.5
sÖ Heating circuit pump
or
control output
sA Circulation pump for heating the
DHW tank (accessory)
sK DHW circulation pump (installed
on site)
sL Shunt pump (installed on site)
fÖ Mains connection, 50 Hz
fA Oil/gas burner,
connection to DIN 4791
gÖ Central fault indicator (installed on
site)
gS Mixing valve motor for return
temperature control
or
3-way mixing valve for DHW tank
loading system
139
Additional information
Wiring diagram
Mixing valve extension circuit board
A4
A1
Supply temperature sensors
Heating circuit pumps
Mixing valve motors
Relays
5285 941 v.1.5
?
sÖ
gS
K1 - K6
140
Additional Information
Parts List
Order No.
Serial No. *1
7134 555, 7134 556,
7511 362
7143000
7187101
7248248
Ordering Replacement Parts:
Please provide product Model and
Serial Number from rating plate when
ordering replacement parts. Order
replacement components from your
Viessmann distributor.
Parts
001
002
004
005
006
008
011
013
014
015
016
018
019
020
021
024
025
030
031
037
038
040
042
043
047
048
049
050
051
052
054
5285 941 v.1.5
055
065
067
068
074
092
051
068
021
018
074
040
020
Hinges
Optic link
AHL Knob
Fixed high limit cover
Dial-stop 110°C/230°F
Support arm
Safety module (wired)
Front housing (with Pos. 001)
Circuit board enclosure
Flip-down cover
Rear housing
Programming unit
Flip-down cover
Front cover for heating circuits
Flat cable, 14-pole
Fuse holder cover
Fuse holder
Fixed high limit, 3510mm
Adjustable high limit
Switch, 1-pole (FHL test)
Switch, 2-pole (power on/off)
Sensor #1 for outdoor
temperature
Sensor #3 for boiler
Sensor #5 for domestic hot
water production
LON module
Circuit board (mixing valve
expansion)
Motherboard (control, low
voltage)
Circuit board (control software)
Diagnostics module (Optolink)
Motherboard (control, line
voltage)
Circuit board (120V power
supply)
Motherboard (mixing valve
expansion)
Burner cable Nr. 41/90 l=3470
Sensor (Immersion, NI500)
Sensor #2 for supply
Harness for programming unit
Fuse 6.3A / 250V (10 pack)
019
006
011
004
031
037
030
038
005
025
092
024
002
001
013
001
015
141
Additional Information
Parts List
(continued)
Other Parts (not illustrated)
060 Accessory pack (plugs)
080 Installation / Service Instructions
081 Operating Instructions
082 Parts List
*1
048
055
Rating plate
A 16-digit bar-coded serial no. is printed
on the front housing, below the flip-down
cover.
008
016
047
049
052
050
054
042
043
014
014
013
142
5285 941 v.1.5
067
5285 941 v.1.5
143
144
5285 941 v.1.5
5285 941 v.1.5
145
146
-40
-35
-25
-20
-18
-16
-14
-12
-10
-9
-8
-7
-6
-5
-4
-3
-2
-1
0
+1
+2
+3
+4
+5
+6
+7
+8
+9
+10
+12
+14
+16
+18
+20
+25
+30
+35
+40
+50
+60
+70
+80
+90
+100
+110
-40
-31
-13
-4
0
+3
+7
+10
+14
+16
+18
+19
+21
+23
+25
+27
+28
+30
+32
+34
+36
+37
+39
+41
+43
+45
+46
+48
+50
+54
+57
+61
+64
+68
+77
+86
+95
+104
+122
+140
+158
+176
+194
+212
+230
Viessmann Manufacturing Company Inc.
750 McMurray Road
Waterloo, Ontario • N2V 2G5 • Canada
Tel. (519) 885-6300 • Fax (519) 885-0887
www.viessmann.ca • info@viessmann.ca
Technical information subject to change without notice.
°F
5285 941 v.1.5
Viessmann Manufacturing Company (U.S.) Inc.
45 Access Road
Warwick, Rhode Island • 02886 • USA
Tel. (401) 732-0667 • Fax (401) 732-0590
www.viessmann-us.com • info@viessmann-us.com
°C
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