Viessmann VITOCAL 200-G Quick guide

Installation and service instructions
for contractors
VIESMANN
Vitocal 200-G
Type BWC 201.A06 to A17, 6 to 17 kW
Brine/water heat pump with electric drive, 400 V~
Type BWC-M 201.A06 to A10, 6 to 10 kW
Brine/water heat pump with electric drive, 230 V~
VITOCAL 200-G
5546220 GB 6/2018 Please keep safe.

2
Please follow these safety instructions closely to
prevent accidents and material losses.
Safety instructions explained
Danger
This symbol warns against the risk of injury.
!Please note
This symbol warns against the risk of material
losses and environmental pollution.
Note
Details identified by the word "Note" contain additional
information.
Target group
These instructions are exclusively intended for author-
ised contractors.
■Work on the refrigerant circuit may only be carried
out by authorised refrigeration engineers.
■Work on electrical equipment must only be carried
out by a qualified electrician.
■The system must be commissioned by the system
installer or a qualified person authorised by the
installer.
Regulations to be observed
■National installation regulations
■Statutory regulations for the prevention of accidents
■Statutory regulations for the protection of the envi-
ronment
■Codes of Practice of the relevant trade associations
■All relevant safety regulations as defined by DIN, EN,
DVGW, VDE and locally applicable standards
aÖNORM, EN and ÖVE
cSEV, SUVA, SVTI, SWKI and SVGW
Safety instructions for working on the system
Working on the system
■Isolate the system from the power supply, e.g. by
removing the separate fuse or by means of a mains
isolator, and check that it is no longer live.
Note
In addition to the control circuit there may be several
power circuits.
Danger
Contact with live components can result in
severe injuries. Some components on PCBs
remain live even after the power supply has
been switched off.
Prior to removing covers from the appliances,
wait at least 4 minutes until the voltage has
completely dropped out.
■Safeguard the system against reconnection.
■Wear suitable personal protective equipment when
carrying out any work.
Danger
Hot surfaces and fluids can lead to burns or
scalding.
■Before maintenance and service work, switch
OFF the appliance and let it cool down.
■Never touch hot surfaces on the appliance, fit-
tings or pipework.
!Please note
Electronic assemblies can be damaged by elec-
trostatic discharge.
Prior to commencing work, touch earthed
objects such as heating or water pipes to dis-
charge static loads.
Repair work
!Please note
Repairing components that fulfil a safety func-
tion can compromise the safe operation of the
system.
Replace faulty components only with genuine
Viessmann spare parts.
Safety instructions
Safety instructions
5546220

3
Auxiliary components, spare and wearing parts
!Please note
Spare and wearing parts that have not been tes-
ted together with the system can compromise its
function. Installing non-authorised components
and making non-approved modifications or con-
versions can compromise safety and may inva-
lidate our warranty.
For replacements, use only original spare parts
supplied or approved by Viessmann.
Safety instructions for operating the system
What to do if water escapes from the appliance
Danger
If water escapes from the appliance there is a
risk of electrocution.
Switch OFF the heating system at the external
isolator (e.g. fuse box, domestic distribution
board).
Danger
If water escapes from the appliance there is a
risk of scalding.
Never touch hot heating water.
Safety instructions
Safety instructions (cont.)
5546220

4
1. Information Disposal of packaging ............................................................................ 6
Symbols ................................................................................................. 6
Intended use .......................................................................................... 6
Product information ................................................................................ 7
2. Preparing for installation Requirements for on-site connections ................................................... 8
Siting and transport requirements .......................................................... 8
■Transport ............................................................................................ 8
■Installation room requirements ........................................................... 9
3. Installation sequence Siting the heat pump .............................................................................. 11
Removing the top panel ......................................................................... 12
Making the hydraulic connections .......................................................... 12
■Connecting the primary circuit ............................................................ 12
■Connecting the secondary circuit ....................................................... 13
Electrical connections ............................................................................ 14
■Preparing the electrical connections ................................................... 14
■Installing the programming unit .......................................................... 15
■Routing cables to the wiring chamber ................................................ 16
■Overview of the electrical connections in the heat pump control unit . 17
■Main PCB (230 V~ components) ........................................................ 17
■Expansion PCB on main PCB (230 V~ components) ......................... 20
■Luster terminals (signal and safety connections) ............................... 22
■Controller and sensor PCB (sensors) ................................................. 24
Power supply ......................................................................................... 26
■Heat pump control unit power supply 230 V~ ..................................... 27
■Compressor power supply 230 V~: Type BWC-M 201.A .................... 27
■Compressor power supply 400 V~: Type BWC 201.A ........................ 27
■Power supply with power-OFF: Without on-site load disconnect ....... 27
■Power supply with power-OFF: With on-site load disconnect ............ 28
■Mains power supply in conjunction with on-site power consumption . 30
■Smart Grid .......................................................................................... 30
■Phase monitor (if installed) ................................................................. 32
Make connections at terminals X3.8/X3.9 ............................................. 33
Closing the heat pump ........................................................................... 33
Checking the diaphragm grommets ....................................................... 34
4. Commissioning, inspec-
tion, maintenance
Steps - commissioning, inspection and maintenance ............................ 36
5. Maintenance Overview of wiring chamber .................................................................. 50
■Type BWC 201.A (400 V appliances) ................................................. 50
■Type BWC-M 201.A (230 V appliances) ............................................. 51
Opening the casing door ........................................................................ 52
Overview of internal components .......................................................... 53
Draining the heat pump on the primary/secondary side ........................ 54
Checking the sensors ............................................................................ 55
■Viessmann NTC 10 kΩ (blue marking) ............................................... 56
■Viessmann Pt500A (green marking) ................................................... 57
Checking the fuses ................................................................................ 57
Appliance is too noisy ............................................................................ 58
Condensation and moisture in the heat pump module .......................... 58
6. Parts lists, type
BWC 201.A (400 V applian-
ces)
Overview of the assemblies ................................................................... 59
Parts not shown, type BWC 201.A (400 V appliances) ......................... 60
Casing, type BWC 201.A (400 V appliances) ........................................ 62
Electrical equipment, type BWC 201.A (400 V appliances) ................... 64
Heat pump module, type BWC 201.A (400 V appliances) ..................... 66
Hydraulics, type BWC 201.A (400 V appliances) .................................. 68
Index
Index
5546220

5
7. Parts lists, type
BWC-M 201.A (230 V appli-
ances)
Overview of the assemblies ................................................................... 71
Parts not shown, type BWC-M 201.A (230 V appliances) ..................... 72
Casing, type BWC-M 201.A (230 V appliances) .................................... 74
Electrical equipment, type BWC-M 201.A (230 V appliances) ............... 76
Heat pump module, type BWC-M 201.A (230 V appliances) ................. 78
Hydraulics, type BWC-M 201.A (230 V appliances) .............................. 80
8. Commissioning/service
reports
Hydraulic parameters report .................................................................. 82
Control parameter report ....................................................................... 82
9. Specification ................................................................................................................ 93
10. Appendix Commissioning order ............................................................................. 98
Final decommissioning and disposal ..................................................... 98
11. Certificates Declaration of conformity ....................................................................... 99
12. Keyword index ................................................................................................................100
Index
Index (cont.)
5546220

6
Please dispose of packaging waste in line with statu-
tory regulations.
DE: Use the disposal system organised by
Viessmann.
AT: Use the ARA statutory disposal system (Altstoff
Recycling Austria AG, licence number 5766).
CH: Packaging waste is disposed of by the HVAC
contractor.
Symbols
Symbol Meaning
Reference to other document containing
further information
1.
Step in a diagram:
The numbers correspond to the order in
which the steps are carried out.
Warning of material losses and environ-
mental pollution
Live electrical area
Pay particular attention.
■Component must audibly click into place.
or
■Acoustic signal
■Fit new component.
or
■In conjunction with a tool: Clean the sur-
face.
Dispose of component correctly.
Dispose of component at a suitable collec-
tion point. Do not dispose of component in
domestic waste.
The steps in connection with commissioning, inspec-
tion and maintenance are found in the "Commission-
ing, inspection and maintenance" section and identified
as follows:
Symbol Meaning
Steps required during commissioning
Not required during commissioning
Steps required during inspection
Not required during inspection
Steps required during maintenance
Not required during maintenance
Intended use
The appliance is only intended to be installed and
operated in sealed unvented heating systems that
comply with EN 12828, with due attention paid to the
associated installation, service and operating instruc-
tions.
Depending on the version, the appliance can only be
used for the following purposes:
■Central heating
■Central cooling
■DHW heating
Information
Disposal of packaging
5546220
Information

7
The range of functions can be extended with additional
components and accessories.
Intended use presupposes that a fixed installation in
conjunction with permissible, system-specific compo-
nents has been carried out.
Commercial or industrial usage for a purpose other
than central heating/cooling or DHW heating shall be
deemed inappropriate.
Incorrect usage or operation of the appliance (e.g. the
appliance being opened by the system user) is prohibi-
ted and will result in an exclusion of liability. Incorrect
usage also occurs if the components in the heating
system are modified from their intended function.
Note
The appliance is intended exclusively for domestic or
semi-domestic use, i.e. even users who have not had
any instruction are able to operate the appliance
safely.
Product information
Structure
The Vitocal 200-G is a brine/water heat pump for cen-
tral heating, central cooling and DHW heating in mono
mode or mono energetic systems.
The refrigerant circuit is equipped with a thermostatic
expansion valve.
An instantaneous heating water heater (accessories)
can additionally be fitted into the heat pump to support
central heating and DHW heating.
Hydraulics
The heat pump includes high efficiency circulation
pumps for the primary and secondary circuit, as well
as a high efficiency circulation pump for DHW heating.
Central heating
The heat pump can supply up to 2 heating circuits,
1 heating circuit without and 1 heating circuit with
mixer: The mixer extension kit (accessories) is
required to control the mixer.
Room cooling
Rooms can be cooled either via 1 heating/cooling cir-
cuit or 1 separate cooling circuit. Hydraulic accessories
are required for this, e.g. NC-Box with mixer.
Heat pump control unit
The entire system is monitored and controlled by the
integral Vitotronic 200 heat pump control unit,
type WO1C.
System examples
Available system examples: See www.viessmann-
schemes.com.
Information
Intended use (cont.)
5546220
Information

8
133
576
662
727
792
889
962
1155
87
67
125
182
361
496
449
524
600
A
230 V~< 42 V
B
C
D
E
230 V~
< 42 V
A
B
C
E D
784
844
Fig. 1
A
+
Heating water return and DHW cylinder re-
turn
BDHW cylinder flow (heating water side)
CHeating water flow
DPrimary circuit flow (heat pump brine inlet)
EPrimary circuit return (heat pump brine out-
let)
Siting and transport requirements
Transport
!Please note
Impacts, compression and tensile loads can
cause damage to the outside panels of the
appliance.
Never put weight on the top, front or side panels
of the appliance.
!Please note
Tilting the compressor at a steep angle inside
the heat pump can result in appliance damage.
Max. tilting angle: 45° for a very short time
Preparing for installation
Requirements for on-site connections
5546220
Installation

9
Installation room requirements
!Please note
Unfavourable ambient conditions can lead to
malfunctions and appliance damage.
The installation room must be dry and free from
the risk of frost:
■Ensure ambient temperatures between 0 and
35 °C.
■Max. 70 % relative humidity (corresponds to
an absolute humidity of approx. 25 g water
vapour/kg dry air)
Danger
Dust, gases and vapours can be damaging to
health and trigger explosions.
Avoid dust, gases and vapours in the installation
room.
!Please note
Overloading the floor can result in damage to
the building structure.
Observe the permissible floor load. Take the
total weight of the appliance into account.
Total weight
Vitocal 200-G Type Weight in kg
230 V appliances BWC-M 201.A06 115
201.A08 119
201.A10 131
400 V appliances BWC 201.A06 113
201.A08 117
201.A10 129
201.A13 135
201.A17 148
To prevent the transmission of structure-borne noise,
never site the appliance above ceilings with wooden
joists, e.g. in the attic.
Minimum room volume (to EN 378)
Vitocal 200-G Type Refrigerant charge
in kg
Minimum room vol-
ume in m3
230 V appliances BWC-M 201.A06 1.20 2.73
201.A08 1.45 3.30
201.A10 1.70 3.86
400 V appliances BWC 201.A06 1.20 2.73
201.A08 1.45 3.30
201.A10 1.70 3.86
201.A13 2.20 5.00
201.A17 2.90 6.59
Preparing for installation
Siting and transport requirements (cont.)
5546220
Installation

10
Minimum clearances
≥ 400
≥ 1500
A
B
Fig. 2
ADimension subject to on-site installation and site
conditions
B≥ 100 mm
Note
■Observe clearances for installation and mainte-
nance.
■Additional strain relief clamps are required for the
power cables if the clearance behind the heat pump
is more than 80 mm.
Preparing for installation
Siting and transport requirements (cont.)
5546220
Installation

11
4x
4x
1.
2.
Fig. 3
1. Position the heat pump according to the details on
page 9.
!Please note
Operating the appliance without first remov-
ing the transport brackets may cause vibra-
tions and excessive noise.
Remove the transport brackets.
2. Align the appliance horizontally.
Note
If the adjustable feet are used to compensate for an
uneven floor (max. 10 mm), the pressure load on the
feet must be distributed evenly.
Installation sequence
Siting the heat pump
5546220
Installation

12
1.
Fig. 4
Making the hydraulic connections
For arrangement of hydraulic connections: See
page 8.
Connecting the primary circuit
!Please note
The heat transfer medium can cause corrosion
damage to on-site lines and components.
The components and lines used must be resist-
ant to the heat transfer medium. Never use zinc-
plated/galvanised pipes.
Installation sequence
Removing the top panel
5546220
Installation

13
1. Equip the primary circuit with an expansion vessel
and safety valve (to DIN 4757).
Note
■The expansion vessel must be approved to
DIN 4807. The diaphragms of the expansion ves-
sel and safety valve must be suitable for the heat
transfer medium.
■The blow-down and drain pipes should terminate
in a container. This container must be able to
hold the maximum possible expansion volume of
the heat transfer medium.
2. Ensure adequate thermal and anti-vibration insula-
tion where pipes penetrate walls.
3. Connect primary pipes to heat pump.
!Please note
Mechanically loaded hydraulic connections
lead to leaks, vibration and appliance dam-
age.
Connect on-site lines so that they are free of
load and torque stress.
!Please note
Leaking hydraulic connections lead to appli-
ance damage.
Ensure the diaphragm grommets at the hose
outlets are seated correctly. Seal hose out-
lets with sealing tape if necessary.
4. Insulate pipes inside the building to prevent heat
and vapour diffusion.
5. Charge the primary circuit with Viessmann heat
transfer medium and vent.
Note
Ensure frost protection down to –19 °C.
Viessmann heat transfer medium is a ready-mixed
ethylene glycol-based medium. It contains inhibi-
tors for corrosion protection. The heat transfer
medium can be used at temperatures down to
–19 °C.
Note
Position of diaphragm grommets for hoses: See
page 34.
Connecting the secondary circuit
1. Equip the secondary circuit on site with an expan-
sion vessel and safety assembly (to DIN 4757).
Fit the safety assembly to the on-site line in the
heating water return.
2. Connect the secondary lines to the heat pump
(7 ≥ 28 mm).
!Please note
Mechanically loaded hydraulic connections
lead to leaks, vibrations and appliance dam-
age.
Connect on-site lines so that they are free of
load and torque stress.
!Please note
Leaking hydraulic connections lead to appli-
ance damage.
Ensure the diaphragm grommets at the hose
outlets are seated correctly. Seal hose out-
lets with sealing tape if necessary.
3. Fill and vent secondary circuit.
4. Thermally insulate pipes inside the building.
Note
■Position of diaphragm grommets for hoses: See
page 34.
■In underfloor heating circuits, install a temperature
limiter on site to restrict the maximum temperature of
the underfloor heating system.
■Ensure the minimum flow rate, e.g. by means of an
overflow valve: See "Specification" on page 93.
Installation sequence
Making the hydraulic connections (cont.)
5546220
Installation

14
Preparing the electrical connections
Cables
■For cable lengths and cable cross-sections, see the
following tables.
■For accessories:
Cables with the required number of cores for exter-
nal connections.
Prepare an on-site distribution box.
Danger
Damaged wiring insulation wiring can lead to
serious injury from electrical current and result in
appliance damage.
Route cables so that they cannot touch very hot,
vibrating or sharp-edged components.
Danger
Incorrect wiring can lead to serious injury from
electrical current and result in appliance dam-
age.
Take the following measures to prevent drifting
of wires into the adjacent voltage area:
■Route LV leads < 42 V separately from cables
> 42 V/230 V~/400 V~ and secure with cable
ties.
■Only strip the minimum of insulation from
cables as close as possible to the terminals
and bundle tightly to the corresponding termi-
nals.
■If 2 components are connected to the same
terminal, press both cores together in a single
wire ferrule.
Required cable lengths in the heat pump plus distance to wall
Heat pump control unit power supply 230 V~ 1.0 m
Compressor power supply 400 V~/230 V~ 1.0 m
Additional connecting cables 1.0 m
Recommended power cables
Compressor power supply
Vitocal 200-G Type Cable Max. cable length
230 V appliances BWC-M 201.A06 3 x 4.0 mm240 m
201.A08 3 x 4.0 mm232 m
201.A10 3 x 4.0 mm226 m
400 V appliances BWC 201.A06 5 x 2.5 mm250 m
201.A08 5 x 2.5 mm250 m
201.A10 5 x 2.5 mm250 m
201.A13 5 x 2.5 mm250 m
201.A17 5 x 2.5 mm250 m
Further power supplies
Power supply Cable Max. cable length
Heat pump control unit
230 V~
■Without power-OFF 3 x 1.5 mm240 m
■With power-OFF 5 x 1.5 mm240 m
Instantaneous heating water
heater
■230 V~ 7 x 2.5 mm250 m
■400 V~ 5 x 2.5 mm250 m
Installation sequence
Electrical connections
5546220
Installation

15
Installing the programming unit
3.
2.
1.
2x
Fig. 5
6x
[XÖ
X
7.
8.
4.
6.
9.
11.
10.
5.
Fig. 6
Installation sequence
Electrical connections (cont.)
5546220
Installation

16
Routing cables to the wiring chamber
When routing the on-site connecting cables, observe
the location of the cable entries leading into the appli-
ance through the back panel: See page 8.
< 42 V
230 V/400 V
Fig. 7
1. Route LV leads through the "< 42 V" opening into
the wiring chamber of the heat pump control unit.
Provide strain relief using the cable ties supplied.
2. Route 230 V cables and the compressor power
cable through the "230 V~/400 V~" opening into
the wiring chamber of the heat pump control unit.
Provide strain relief using the cable ties supplied.
For power supply, see from page 26.
Note
Route LV leads and 230 V/400 V cables as far
apart as possible.
Installation sequence
Electrical connections (cont.)
5546220
Installation

17
Overview of the electrical connections in the heat pump control unit
A
X3F1
X2X1
X31
X25
X24
aVG
F0 F4
F6
F7
F20
F14
F16
F8
F27
F11
F13
F26
F3
sXF sXS
sYAsYS
sVA
J4
J3
B
C
D
Fig. 8
ALuster terminals: See page 22.
F1 Fuse 6.3 A (slow)
BMain PCB: See page 17.
F3 Fuse 6.3 A (slow)
CExpansion PCB on main PCB: See page 20.
DController and sensor PCB: See page 24.
Main PCB (230 V~ components)
Information regarding connection values
■The specified output is the recommended connected
load.
■The total output of all components connected directly
to the heat pump control unit (e.g. pumps, valves,
message facilities, contactors) must not exceed
1000 W.
If the total output is ≤ 1000 W, the individual rating of
a component (e.g. pump, valve, message facility,
contactor) can be greater than specified. However,
the breaking capacity of the corresponding relay
must not be exceeded.
■The specified current indicates the max. switching
current of the switching contact. Observe total cur-
rent 5 A.
■Safety LV is unsuitable for controlling external heat
generators.
Set the required parameters during commissioning:
See page 39 onwards.
Installation sequence
Electrical connections (cont.)
5546220
Installation

18
Plug sYA
Clamps Function Explanation
211.2 Secondary pump ■In systems without a heating water buffer cylinder, no
other heating circuit pump is required: See terminal
212.2.
■Connect a temperature limiter to restrict the maximum
temperature for underfloor heating circuits (if instal-
led) in series.
Connection values
■Output: 140 W
■Voltage: 230 V~
■Max. switching current: 4(2) A
Note
The secondary pump is connected at the factory.
211.3
r
1.
Control of instantaneous heating wa-
ter heater, stage 1
Connection values
■Output: 10 W
■Voltage: 230 V~
■Max. switching current: 4(2) A
211.4
■Circulation pump for cylinder heat-
ing
Connection values
■Output: 130 W
■Voltage: 230 V~
■Max. switching current: 4(2) A
Note
The circulation pump for cylinder heating is connected
at the factory.
■Cylinder loading pump
M
■2-way shut-off valve
211.5
NC/AC
Control of natural cooling function NC-Box or on-site components for natural cooling
Connection values
■Output: 10 W
■Voltage: 230 V~
■Max. switching current: 4(2) A
Plug sYS
Clamps Function Explanation
212.2
A1
Heating circuit pump for heating cir-
cuit without mixer A1/HC1
■This pump is connected in addition to the secondary
pump if a heating water buffer cylinder is installed.
■Connect the temperature limiter to restrict the maxi-
mum temperature for underfloor heating systems (if
installed) in series.
Connection values
■Output: 100 W
■Voltage: 230 V~
■Max. switching current: 4(2) A
Installation sequence
Electrical connections (cont.)
5546220
Installation

19
Plug sYS
Clamps Function Explanation
212.3 DHW circulation pump Connection values
■Output: 50 W
■Voltage: 230 V~
■Max. switching current: 4(2) A
212.4 3-way diverter valve for heating water
buffer cylinder bypass or heat pump
in the case of dual alternative mode
Connection values
■Output: 130 W
■Voltage: 230 V~
■Max. switching current: 4(2) A
Connecting a temperature limiter as a maximum temperature limiter for underfloor heating
General connection of a temperature limiter B
M
1~
C
B
X2.N
?
A
X1.
Fig. 9
Connecting the temperature limiter, part no. 7151728,
7151729 B
M
1~
C
B
sÖ
X2.N
?
A
X1.
Fig. 10
Heating circuit without mixer A1/HC1 Connection A to
control unit
Circulation pump C
■Without heating water buffer cylinder 211.2 Secondary pump
■With heating water buffer cylinder 212.2 Heating circuit pump A1/HC1
Connecting the temperature limiter, part no. 7151728,
7151729 B to the mixer extension kit
M
1~
C
B
A
sÖ
sÖ
N
?
Fig. 11
AConnect plug sÖ to the mixer extension kit.
BTemperature limiter
CHeating circuit pump for heating circuit with mixer
Installation sequence
Electrical connections (cont.)
5546220
Installation

20
Plug sYF
Clamps Function Explanation
214.1
M2
External hook-up, heating/cooling cir-
cuits:
Central heating demand, heating cir-
cuit M2/HC2
230 V~ digital input:
■230 V~: Central heating demand for heating circuit
M2/HC2 active
■0 V: No demand
■Breaking capacity 230 V, 0.15 A
214.2
M2
External hook-up, heating/cooling cir-
cuits:
Central cooling demand, heating cir-
cuit M2/HC2
230 V~ digital input:
■230 V~: Central cooling demand for heating circuit
M2/HC2 active
■0 V: No demand
■Breaking capacity 230 V, 0.15 A
Plug sYH
Clamps Function Explanation
216.1
A1
External hook-up, heating/cooling cir-
cuits:
Central heating demand, heating cir-
cuit A1/HC1
or
230 V~ digital input:
■230 V~: Central heating demand for heating circuit
A1/HC1 active
■0 V: No demand
■Breaking capacity 230 V, 2 mA
Smart Grid:
Floating contact 1
230 V~ digital input:
■230 V~: Contact active
■0 V: Contact not active
■Breaking capacity 230 V, 2 mA
216.2
A1
External hook-up, heating/cooling cir-
cuits:
Room cooling demand, heating circuit
A1/HC1
230 V~ digital input:
■230 V~: Room cooling demand for heating circuit
A1/HC1 active
■0 V: No demand
■Breaking capacity 230 V, 0.15 A
216.4 Smart Grid:
Floating contact 2
230 V~ digital input:
■230 V~: Contact active
■0 V: Contact not active
■Breaking capacity 230 V, 2 mA
Expansion PCB on main PCB (230 V~ components)
Information regarding the connection values
■The specified output is the recommended connected
load.
■The total output of all components connected directly
to the heat pump control unit (e.g. pumps, valves,
message facilities, contactors) must not exceed
1000 W.
If the total output is < 1000 W, the individual rating of
a component (e.g. pump, valve, message facility,
contactor) can be greater than specified. However,
the breaking capacity of the corresponding relay
must not be exceeded.
■The stated current indicates the max. switching cur-
rent of the switching contact (observe the total cur-
rent of 5 A).
■Controls for external heat source and central fault
messages are unsuitable for safety LV.
Set the required parameters during commissioning:
See page 39 onwards.
Installation sequence
Electrical connections (cont.)
5546220
Installation