Viessmann VITOTRONIC 300 Quick guide

VITOTRONIC 300
Installation and
service instructions
for heating engineers
VitotronicĂ300
typeĂKW3
Weather-compensated digital boiler and heating circuit control
See applicability, pageĂ3.
5862Ă297ĂGB 12/2002 Please keep safe

2
General information
Safety instructions
Please follow these safety instructions closely to prevent accidents and
material losses.
Safety regulations
Installation, initial start-up,
inspection, maintenance and repairs
must be carried out by a competent
person (heating engineer/installation
contractor).
Observe all current safety
regulations as defined by DIN, EN,
DVGW, TRGI, TRF and VDE or locally
applicable standards.
See also the safety instructions sheet
in the Vitotec Technical Guide.
Before working on the equipment/
heating system, isolate the mains
electrical supply (e.g. by removing a
separate mains fuse or by means of a
mains electrical isolator) and
safeguard against unauthorised
reconnection.
When using gas as fuel, also close
the mains shut-off valve and
safeguard against unauthorised
re-opening.
Work on gas equipment
This must only be carried out by an
approved contractor.
Please observe all commissioning
work specified for gas installations
acc. to TRGI or TRF and all local
regulations.
Repair work
It is not permitted to carry out repairs
on parts that fulfil a safety function.
nitial start-up
The initial start-up must be carried
out by the installer of the system or a
designated commissioning engineer;
all actual values should be recorded
in a commissioning/service report.
nstructing the system user
The system installer must hand the
operating instructions to the system
user and instruct him/her in the
operation of the system.
¨ĂSafety instruction
In this instruction manual, this
heading denotes information which
must be observed to prevent
accidents and material losses.
¨This symbol denotes information
which must be observed to
prevent material losses.
5862Ă297ĂGB

3
General information/index
Product information/applicability
Vitotronic 300, type KW3
Only for integration/installation on/in Viessmann boilers.
Valid for control units
Part no. 7450 760 to part no. 7450 763
ndex
General information
Safety instructionsĂ 2
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Product information/applicabilityĂ 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Heating system designs
System versions 1 to 5 5
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
nstallation
Summary of electrical connectionsĂ 12
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Inserting cables and applying strain reliefĂ 14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Changing the high limit safety cut-out settingĂ 15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Changing the control thermostat settingĂ 17. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Inserting the boiler coding cardĂ 18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Sensor connectionĂ 19. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Pump connectionĂ 20. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
External connections on plug aBÖĂ21. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Connecting central fault messagesĂ 22. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
External heating program changeoverĂ 23. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Burner connectionĂ 24. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Mains electrical connectionĂ 27. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installing the top of the control unitĂ 28. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Opening the control unitĂ 29. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
nitial start-up
StepsĂ 30
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Further details regarding the individual stepsĂ 30. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Service scans
Service level summaryĂ 36
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Temperatures, boiler coding card and brief scansĂ 37. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Scanning operating conditionsĂ 39. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Scanning and resetting "Maintenance" displayĂ 40. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5862Ă297ĂGB

4
Contents
ndex (cont.)
Troubleshooting
Faults with fault display at the programming unitĂ 42
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Downloading fault codes from the fault memory (error history)Ă 50. . . . . . . . . . . . . . . . . . . . . .
Faults without fault display at the programming unitĂ 51. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Function description
Boiler temperature controlĂ 54
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Heating circuit controlĂ 56. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DHW cylinder temperature controlĂ 61. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Components
Components from the parts listĂ 65
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Radio clock receiverĂ 70. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Flue gas temperature sensorĂ 71. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Mixer circuit extension kitĂ 71. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Contact temperature sensorĂ 81. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Limit thermostatĂ 82. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Remote controlĂ 83. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Room temperature sensorĂ 89. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Plug aBÖĂ90. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Control module VĂ 91. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
KM BUS distributorĂ 93. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Mains power distributorĂ 94. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Boiler coding cardĂ 95. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Burner connection cablesĂ 95. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Vitoair draught stabiliserĂ 96. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Motorised flue gas damperĂ 97. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Coding
Resetting codes to as delivered conditionĂ 98
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Code 1Ă 98. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Code 2Ă 101. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Screed drying function diagramĂ 122. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Burner switching hysteresisĂ 123. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Parts listĂ 124. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Connection and wiring diagramĂ 127. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Appendix
SpecificationĂ 130
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Table for "Setting and equipment" entriesĂ 131. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Keyword indexĂ 136. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5862Ă297ĂGB

5
Heating system designs
System version 1
One direct connected heating circuit without mixer
ABoiler with control unit
BDomestic hot water cylinder
CVitotrol remote control,
Control module V or Vitocom 100;
KM BUS distributor, only with
several KM BUS users
DHeating circuit without mixer A1
Plug
!Outside temperature sensor
§Boiler temperature sensor
%DHW cylinder temperature
sensor
sÖĂA1 Heating circuit pump
sA Circulation pump for DHW
cylinder loading (accessory)
sK DHW circulation pump (on site)
fÖ Mains connection (230ĂV~Ă50ĂHz)
fA Burner 1st stage*1
lÖ Burner 2nd stage/modulating*1
aVG KM BUS user/distributor
a:A Two-stage/modulating burner
extension
Required coding Automatic changeover
ĈĈĈĈĈ 00:Ă2 with DHW cylinder
*1Standard delivery boiler.
5862Ă297ĂGB
A1
D
B
C
A

B
D
A
E
M2
C
6
Heating system designs
System version 2
One mixer circuit
ABoiler with control unit
BDomestic hot water cylinder
CKM BUS distributor, only for
several KM BUS users,
e.g. Vitotrol remote control,
extension kit or Vitocom 100
DMixer circuit M2
EMixer circuit extension kit
Plug
!Outside temperature sensor
?Flow temperature sensor
(standard delivery extension
kit)
§Boiler temperature sensor
%DHW cylinder temp. sensor
aJ Return temperature sensor
(accessory)*2
sÖĂM2Heating circuit pump, mixer
circuit
sA Circulation pump for DHW
cylinder loading (accessory)
sK DHW circulation pump (on site)
fÖ MainsĂconnectionĂ(230ĂV~Ă50ĂHz)
fA Burner 1st stage*3
lÖ Burner 2nd stage/modulating*3
aVG KM BUS distributor
aBH Mains connection for
extension kit
a:A Two-stage/modulating burner
extension
Required coding
00:Ă3 System with one mixer circuit, without DHW cylinder
or
00:Ă4 System with one mixer circuit, with DHW cylinder
*1Check valve; only required if joined to a connector.
*2e.g. for underfloor heating control via flow and return temperature sensor.
*3Standard delivery boiler.
5862Ă297ĂGB

7
Heating system designs
System version 3
One direct connected heating circuit without mixer and one mixer circuit
ABoiler with control unit
BDomestic hot water cylinder
CKM BUS distributor, only for
several KM BUS users,
e.g. Vitotrol remote control,
extension kit or Vitocom 100
DMixer circuit M2
EHeating circuit without mixer A1
FMixer circuit extension kit
Plug
!Outside temperature sensor
?Flow temperature sensor
(standard delivery extension kit)
§Boiler temperature sensor
%DHW cylinder temp. sensor
aJ Return temperature sensor
(accessory)*2
sÖĂA1 Heating circuit pump
sÖĂM2Heating circuit pump, mixer
circuit
sA Circulation pump for DHW
cylinder loading (accessory)
sK DHWĂcirculationĂpumpĂ(onĂsite)
fÖ MainsĂconnectionĂ(230ĂV~Ă50ĂHz)
fA Burner 1st stage*3
lÖ Burner 2nd stage/modulating*3
aVG KM BUS distributor
aBH Mains connection for
extension kit
a:A Two-stage/modulating burner
extension
Required coding Automatic changeover
ĈĈĈĈĈ 00:Ă6 with DHW cylinder
*1Check valve; only required if joined to a connector.
*2e.g. for underfloor heating control via flow and return temperature sensor.
*3Standard delivery boiler.
5862Ă297ĂGB
B
D
A1
E
A
F
M2
C

8
Heating system designs
System version 4
Two mixer circuits
5862Ă297ĂGB
M2
B
EC
A
M3
H
F
D
G

9
Heating system designs
System version 4 (cont.)
ABoiler with control unit
BDomestic hot water cylinder
CMixer circuit M2
DExtension kit for mixer circuit M2
EMixer circuit M3
FExtension kit for mixer circuit M3
GKM BUS distributor
HMains power distributor
Plug
!Outside temperature
sensor
?Flow temperature sensor
§Boiler temperature sensor
%DHW cylinder temperature
sensor
aJ Return temperature
sensor*2
sÖĂM2/M3 Heating circuit pump
sA Circulation pump for DHW
cylinder loading
sK DHW circulation pump
fÖ Mains power connection
(230 V~ 50 Hz)
fA Burner 1st stage*3
lÖ Burner 2nd stage/
modulating*3
aVG KM BUS distributor
aBH Mains connection for
mains distributor
a:A Two-stage/modulating
burner extension
Required coding
00:Ă7 System with two mixer circuits, without DHW cylinder
or
00:Ă8 System with two mixer circuits, with DHW cylinder
*1Check valve; only required if joined to a connector.
*2e.g. for underfloor heating control via flow and return temperature sensor.
*3Standard delivery boiler.
5862Ă297ĂGB

M2
B
EC
A
M3
H
F
D
G
K
A1
10
Heating system designs
System version 5
One direct connected heating circuit without mixer and two mixer circuits
5862Ă297ĂGB

11
Heating system designs
System version 5 (cont.)
ABoiler with control unit
BDomestic hot water cylinder
CMixer circuit M2
DExtension kit for mixer circuit M2
EMixer circuit M3
FExtension kit for mixer circuit M3
GKM BUS distributor
HMains power distributor
KHeating circuit without mixer A1
Plug
!Outside temperature
sensor
?Flow temperature sensor
§Boiler temperature sensor
%DHW cylinder temperature
sensor
aJ Return temp. sensor*2
sÖĂA1 Heating circuit pump
sÖĂM2/M3Heating circuit pump
sA Circulation pump for DHW
cylinder loading
sK DHW circulation pump
fÖ Mains power connection
(230 V~ 50 Hz)
fA Burner 1st stage*3
lÖ Burner 2nd stage/
modulating*3
aVG KM BUS distributor
aBH Mains connection for
mains distributor
a:A Two-stage/modulating
burner extension
Required coding Automatic changeover
ĈĈĈĈĈ 00:10 with DHW cylinder
*1Check valve; only required if joined to a connector.
*2e.g. for underfloor heating control via flow and return temperature sensor.
*3Standard delivery boiler.
5862Ă297ĂGB

12
Installation
Summary of electrical connections
Illustration shows the bottom part of the control unit as viewed from the rear.
5862Ă297ĂGB

13
Installation
Summary of electrical connections (cont.)
Plug 230 V~
sÖ Heating circuit pump A1
sA Circulation pump for DHW
cylinder loading (accessory)
sK DHW circulation pump (on site)
fÖ Mains power connection
fA Burner
gÖ Central fault message
aBÖ External connections,
e.āg. supplementary safety
equipment
aBH Mains electrical connection of
accessories
Low voltage plug
!Outside temperature sensor
(ATS)
§Boiler temperature sensor
(KTS)
%DHW cylinder temperature
sensor 1 (STS)
%BDHW cylinder temperature
sensor 2 (STS)
aG Flue gas temperature sensor
(AGS) (accessory)
aVD Telephone contact
(external heating program
changeover)
aVG KM BUS users e.āg. Vitotrol
remote control (accessory)
or
Vitocom 100
a:A Two-stage/modulating burner
extension (part of the standard
boiler delivery)
When connecting external switching
contacts or components to the
protective low voltage of the control
unit, please observe the safety
requirements of protection class II,
i.āe. 8.0 mm air gap/creeping distance
or 2.0 mm insulation thickness from
live components.
Ensure a safe electrical separation
for all on-site components (incl.
PC/laptops) acc. to ENĂ60Ă335 or
IECĂ65.
5862Ă297ĂGB

14
Installation
nserting cables and applying strain relief
1. Remove knock-out tab from the
control unit.
2. Click the bottom part of the fixing
clamp into place.
3. Cut out cable grommet.
4. Insert the cable through the
grommet and insert cable
grommet into the casing.
5. Secure the top part of the cable
clamp.
6. Blank off unnecessary knockouts
in the part of the control unit with
cable grommets (not cut out).
5862Ă297ĂGB
4.
6.
3.
2.
1.
5.

15
Installation
Changing the high limit safety cut-out (if required)
The high limit safety cut-out is supplied with a factory setting of 110 ºC.
¨If adjusted to 100 ºC, do not set the control thermostat above 75 ºC.
Adjustment to 100 ºC at EGO
ASlotted screw
1. Pull the fuse from its holder.
2. Unhook and remove the cover
from its four locking tabs.
3. Pull the control unit front panel up
and pivot it back.
4. Turn the slotted screw until the
slot points to 100 ºC (once
adjusted, the high limit safety
cut-out cannot be reset).
5862Ă297ĂGB
4.
A
1.
2.
3.

16
Installation
Changing the high limit safety cut-out setting (cont.)
Adjustment to 100 ºC at Juchheim
1. Pull the fuse from its holder.
2. Unhook and remove the cover
from its four locking tabs.
3. Remove reset button cover "E".
4. Remove the nut.
5. Remove the high limit safety
cut-out.
6. Turn the screw until the indicator
points to 100 ºC.
5862Ă297ĂGB
4.
3.
5.
6.
2.
1.

17
Installation
Changing the control thermostat (if required)
The control thermostat is supplied with a factory setting of 75 ºC.
Do not set the control thermostat above 75 ºC if the high limit safety cut-out
has been adjusted to 100 ºC.
Change to 87 ºC/95 ºC
1. Lever out and remove rotary
selector "R".
2. Using a pair of pointed pliers, break
off the cams between "75" and
"90" or "95" from the stop dial,
which are identified in the drawing.
3. Fit rotary selector "R" so that the
marking lies between "75" and "90"
or "95". Turn rotary selector "R"
fully clockwise to the end stop.
¨If the system is operated in
conjunction with a domestic hot
water cylinder, ensure that the
maximum permissible domestic
hot water temperature is not
exceeded. If necessary, install a
suitable safety device for this
purpose.
5862Ă297ĂGB
1.
3.
2.

18
Installation
nserting the boiler coding card
Only use the boiler coding card included with the boiler product documentation.
Boiler Coding
card
Part no.
Vitola 111 F1 7818 916
Vitola 200
Vitola 222
Vitorond 200, type VR2
Vitorond 222
E1 7818 915
Vitogas 300, type GS3
Vitocrossal 300
Cb 7818 913
Insert the boiler coding card through
the cut-out in the cover into slot "X7".
5862Ă297ĂGB

19
Installation
Sensor connection
AFlue gas temperature sensor
BBoiler temperature sensor
CDHW cylinder temperature
sensor
DOutside temperature sensor
(interchange the cores)
Installation location:
HNorth or north-western wall,
2 to 2.5 m above ground level;
in case of multi-storey buildings
in the upper half of the second
floor
HNot above windows, doors or
ventilation outlets
HNot immediately below a
balcony or gutter
HDo not render over
Connection:
2-core cable with a maximum
length of 35 m and a cross-section
of 1.5Ămm2 (copper)
E2nd DHW cylinder temp. sensor
5862Ă297ĂGB
143
1 2 3
5B
1 2 3
15
1 2 3
145
1 2 3
191
1 2 31 2 3
3
1 2 3
1
1 2 3
5
B DCA E

20
Installation
Pump connection
Available pump connections
sÖ Heating circuit pump A1
sA Circulation pump for DHW
cylinder loading
sK DHW circulation pump
Pumps 230 V~
Please note:
Heating circuit pumps for mixer
circuits are connected to the mixer
circuit extension kit (see page 73).
Pumps 400 V~
AContactor
BThree-phase pump
Rated current: 4 (2) A~
Recommended
connection
cable: H05VVĆF3G 0.75 mm2
or
H05RNĆF3G 0.75 mm2
For selecting the contactor:
Rated voltage: 230 V~
Rated current: 4 (2) A ~
Recommended
connection
cable: H05VVĆF3G 0.75 mm2
or
H05RNĆF3G 0.75 mm2
5862Ă297ĂGB
M
1~
LN L1 L2 L3 N PE
M
3~
A B