Viessmann Vitocal 200-S Quick guide

Installation and service instructions
for contractors
VIESMANN
Vitocal 200-S
Type AWB 201.B04 to B13, C10, C13
Air source heat pump, split version for heating operation
Type AWB-AC 201.B04 to B13, C10, C13
Air source heat pump, split version for heating and cooling operation
For applicability, see the last page
VITOCAL 200-S
5546 727 GB 7/2014 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 quali-
fied 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
Observe the following when working on this system:
■National installation regulations
■Statutory regulations regarding the prevention of
accidents
■Statutory regulations regarding environmental pro-
tection
■Codes of practice of the relevant trade associations.
■All current safety regulations as defined by DIN, EN,
DVGW, VDE and all locally applicable standards
aÖNORM, EN and ÖVE
cSEV, SUVA, SVTI, SWKI and SVGW
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 the
PCBs will remain 'live' even after the power
supply has been switched off.
Prior to removing equipment covers, wait at
least 4 min. to allow the voltage to dissipate.
■Safeguard the system against reconnection.
!Please note
Electronic assemblies can be damaged by elec-
trostatic discharge.
Before beginning work, touch earthed objects,
such as heating or water pipes, to discharge
static loads.
Repair work
!Please note
Repairing components that fulfil a safety func-
tion can compromise the safe operation of your
system.
Defective components must be replaced with
genuine Viessmann spare parts.
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 spare parts supplied
or approved by Viessmann.
Safety instructions
Safety instructions
5546 727 GB

3
1. Preparing for installation Intended use .......................................................................................... 5
Requirements regarding on-site connections ........................................ 5
■Recommended power cables ............................................................. 6
2. Installation sequence Installing the external unit ...................................................................... 8
■Installation information ........................................................................ 8
■Installation site .................................................................................... 8
■Minimum clearances ........................................................................... 9
■Minimum clearances for heat pump cascade (max. 5 external units) 10
■Transport and installation ................................................................... 10
■Floor mounting .................................................................................... 11
■Wall mounting ..................................................................................... 11
Installing the internal unit ....................................................................... 12
■Installation room requirements ........................................................... 12
■Minimum clearances ........................................................................... 12
■Fitting the internal unit to the wall ....................................................... 13
Connecting the refrigerant lines ............................................................. 13
■Routing the refrigerant lines ............................................................... 13
■Sound and vibration isolation when line entry is above ground level . 15
■Connection to the external unit ........................................................... 16
■Connection to the internal unit ............................................................ 17
Connecting the secondary circuit ........................................................... 18
Connecting a cooling circuit if required .................................................. 19
Electrical connection .............................................................................. 19
■Internal unit: Routing the cables to the wiring chamber ...................... 20
■Internal unit: Overview of connections ................................................ 21
■Internal unit: Main PCB (function components 230 V~) ...................... 22
■Internal unit: Expansion PCB on main PCB (function components
230 V~) ............................................................................................... 24
■Internal unit: Luster terminals (signal and safety connections) ........... 26
■Internal unit: Controller and sensor PCB (sensors) ............................ 28
■Internal unit: AVI PCB ......................................................................... 30
■External unit: Overview of connections .............................................. 31
■Connecting internal and external units ............................................... 31
Power supply ......................................................................................... 32
■Heat pump control unit power supply 230 V~ ..................................... 33
■External unit power supply 230 V~/400 V~ ........................................ 33
■Connecting the power cable of the instantaneous heating water
heater (only type AWB-AC) ................................................................ 35
■Power supply with power-OFF ........................................................... 35
■Mains power supply in conjunction with on-site power consumption . 38
Closing the heat pump ........................................................................... 38
■Fitting the front panel of the internal unit ............................................ 39
■Fitting side cover for external unit ....................................................... 39
3. Commissioning, inspec-
tion, maintenance
Steps - commissioning, inspection and maintenance ............................ 40
4. Troubleshooting Repairs .................................................................................................. 56
■Overview of electrical components ..................................................... 56
■Opening the programming unit ........................................................... 56
■Placing the control panel in its service position .................................. 57
■Overview of internal components: Internal unit .................................. 58
■Overview of internal components: External unit ................................. 58
■Draining secondary side heat pump ................................................... 61
■Checking the sensors ......................................................................... 62
■Checking fuses ................................................................................... 64
5. Parts lists, internal unit Ordering parts ........................................................................................ 65
Overview of assemblies, internal unit .................................................... 65
Index
Index
5546 727 GB

4
Parts not shown, internal unit ................................................................ 66
Casing, internal unit ............................................................................... 66
Electrical equipment, internal unit .......................................................... 67
Hydraulics, internal unit, type AWB ....................................................... 69
Hydraulics, internal unit, type AWB-AC ................................................. 71
6. Parts lists, external unit
230 V~, type AWB/AWB-AC
201.B04
Ordering parts ........................................................................................ 74
External unit 230 V~ .............................................................................. 74
■Type AWB/AWB-AC 201.B04 ............................................................. 74
7. Parts lists, external unit
230 V~,
type AWB/AWB-AC 201.B07
Ordering parts ........................................................................................ 76
External unit 230 V~ .............................................................................. 76
■Type AWB/AWB-AC 201.B07 ............................................................. 76
8. Parts lists, external unit
230 V~,
type AWB/AWB-AC 201.B10, B13
Ordering parts ........................................................................................ 78
Overview of assemblies 230 V~ ............................................................ 78
■Type AWB/AWB-AC 201.B10, B13 ..................................................... 78
Casing, external unit 230 V~ ................................................................. 79
■Type AWB/AWB-AC 201.B10, B13 ..................................................... 79
Electrical equipment, external unit 230 V~ ............................................ 80
■Type AWB/AWB-AC 201.B10, B13 ..................................................... 80
Hydraulics, external unit 230 V~ ............................................................ 81
■Type AWB/AWB-AC 201.B10, B13 ..................................................... 81
9. Parts lists, external unit
400 V~,
type AWB/AWB-AC 201.C10, C13
Ordering parts ........................................................................................ 83
Overview of assemblies 400 V~ ............................................................ 83
■Type AWB/AWB-AC 201.C10, C13 .................................................... 83
Casing, external unit 400 V~ ................................................................. 84
■Type AWB/AWB-AC 201.C10, C13 .................................................... 84
Electrical equipment, external unit 400 V~ ............................................ 85
■Type AWB/AWB-AC 201.C10, C13 .................................................... 85
Hydraulics, external unit 400 V~ ............................................................ 87
■Type AWB/AWB-AC 201.C10, C13 .................................................... 87
10. Commissioning/service
reports
Hydraulic parameter report .................................................................... 88
Control parameters report ...................................................................... 88
11. Specification .................................................................................................................. 95
12. Appendix Commissioning order .............................................................................101
13. Declaration of conformity ..................................................................................................................102
14. Keyword index ..................................................................................................................103
Index
Index (cont.)
5546 727 GB

5
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
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.
Any usage beyond this must be approved by the man-
ufacturer for the individual case.
Incorrect usage or operation of the appliance (e.g. the
appliance being opened by the system user) is prohibi-
ted and results 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
use, i.e. even users who have not had any instruction
are able to operate the appliance safely.
Requirements regarding on-site connections
Internal unit
905
58
40
360
+
1105 150
AB
/
960
50
360
450
A B
75
147
219
294
369
41
Fig. 1
Preparing for installation
Intended use
5546 727 GB
Installation

6
Symbol Meaning Connection
Refrigerant lines from/to the external
unit:
Type AWB/
AWB-AC
Pipe 7UNF thread
■Hot gas line 201.B04 12 mm ⅞
Reducer
⅞ x ¾
201.B07
201.B10
201.B13
201.C10
201.C13
16 mm
16 mm
16 mm
16 mm
16 mm
⅞
⅞
⅞
⅞
⅞
■Liquid line 201.B04 6 mm ⅝
Reducer
⅝ x ⁷⁄₁₆
201.B07
201.B10
201.B13
201.C10
201.C13
10 mm
10 mm
10 mm
10 mm
10 mm
⅝
⅝
⅝
⅝
⅝
DHW cylinder flow (heating water side) G 1¼
+
Heating water return and DHW cylinder
return
G 1¼
Heating water flow G 1¼
ACable entry < 42 V —
BCable entry 400 V~/230 V~, > 42 V —
1. Prepare the connections on the heating water and
the DHW side.
Flush the heating system.
2. Prepare the electrical connections.
Cable lengths in the internal/external unit plus wall clearance
Cables Internal unit External unit
Power cables:
■Heat pump control unit (230 V~) 2.0 m –
■Compressor (230 V~/400 V~) –1.5 m
Other connecting cables:
■230 V~, e.g. for circulation pumps 2.0 m –
■< 42 V, e.g. for sensors 2.0 m –
Internal/external unit connecting cable:
■12 V BUS 2.5 m 1.5 m
■43 V BUS 2.5 m 1.5 m
Recommended power cables
Type AWB, AWB-AC 201.B04 to B13, C10, C13
Heat pump control unit (internal unit) 230 V~
Cable cross-section
■Without power-OFF 3 x 1.5 mm2
■With power-OFF 5 x 1.5 mm2
Preparing for installation
Requirements regarding on-site connections (cont.)
5546 727 GB
Installation

7
Type AWB, AWB-AC 201.B04 to B13, C10, C13
Instantaneous heating water heater
Cable cross-section
■400 V~ 5 x 2.5 mm2
■230 V~ 7 x 2.5 mm2
Max. cable length 25 m
Type AWB, AWB-AC 201.B04 201.B07 201.B10 201.B13
External unit 230 V~ (compressor)
Cable cross-section 3 x 2.5 mm23 x 2.5 mm23 x 2.5 mm23 x 4.0 mm2
Max. cable length 29 m 25 m 20 m 20 m
or or
Cable cross-section – – 3 x 4.0 mm23 x 6.0 mm2
Max. cable length – – 32 m 30 m
Type AWB, AWB-AC 201.C10 201.C13
External unit 400 V~ (compressor)
Cable cross-section 5 x 2.5 mm25 x 2.5 mm2
Max. cable length 30 m 30 m
Preparing for installation
Requirements regarding on-site connections (cont.)
5546 727 GB
Installation

8
Installation information
Types of installation:
■Floorstanding installation with line entry above
ground level
■Floorstanding installation with line entry below
ground level
■Wall mounting
Technical guide
Floorstanding installation:
■Use supports for floorstanding installation (accesso-
ries).
■Where such supports cannot be used, install the
external unit freestanding on a solid base of
at least 100 mm height.
■In difficult climatic circumstances (temperatures
below zero, snow, humidity) install the appliance on
a plinth of approx. 300 mm height.
■Take into account the weight of the external unit: See
the following table.
Wall mounting:
■Use the wall mounting bracket set (accessories).
■The wall must meet the structural requirements.
Positioning:
■Never install with the discharge side facing the main
wind direction.
■Provide wall ducts and protective pipes for the refrig-
erant lines and electrical cables without moulded
parts and change of direction.
Weather influences:
■Observe wind loads when installing the unit on sites
exposed to the wind.
■Incorporate the external unit into the lightning protec-
tion system.
■Consider the heat emitted by the unit when planning
your weatherproofing or an enclosure.
Condensate:
■Ensure the condensate can drain freely, and create a
permanent gravel bed below the external unit as a
soakaway.
■In regions with prolonged cold seasons (such as
Sweden for example), provide an electric ribbon
heater (accessory) for the condensate pan.
Insulation against structure-borne noise and vibra-
tions between building and external unit:
■When line entry is above ground level, fit pipe bends
in the refrigerant lines for vibration compensation:
See "Connecting refrigerant lines".
■Route electrical cables/leads between the internal
and external units free of stress.
■Installation only on walls with high weight per area (>
250 kg/m2), in other words not on lightweight walls,
roof structures etc.
■For floorstanding installation, only use the rubber
mounts supplied.
■For wall mounting, only use the anti-vibration mounts
from the bracket set.
■Never use additional anti-vibration mounts, springs,
rubber mounts, etc.
Weight of external units
Type
AWB/AWB-AC
Weight in kg
201.B04 43
201.B07 66
201.B10 113
201.B13 113
201.C10 113
201.C13 113
Installation site
■Select a site with good air circulation, so that the
cooled air can dissipate and be replaced by warm
air.
■Avoid direct insolation.
■When siting the unit where it is exposed to wind,
ensure that the wind cannot influence the fan area.
Strong wind can have a negative influence on the
evaporator ventilation.
■Take into account the lengths of the refrigerant lines:
See "Connecting refrigerant lines".
■Select the installation site so that the evaporator can-
not be blocked by leaves, snow etc.
■Select the installation site giving due consideration to
the physical laws concerning the propagation and
reflection of sound.
Technical guide "Heat pump principles"
Installation sequence
Installing the external unit
5546 727 GB
Installation

9
■Never install in interior corners, in recesses or
between walls. This could result in an "air short cir-
cuit" between the air being discharged and the air
being drawn in.
!Please note
An "air short circuit" during heating operation
will result in the cooled discharged air re-
entering the unit. This can result in reduced
heat pump efficiency and defrosting problems.
Avoid "air short circuits".
!Please note
An "air short circuit" during cooling operation
will result in the heated discharged air re-
entering the unit. This can lead to high pres-
sure faults.
Avoid "air short circuits".
■Never install next to or below bedroom windows.
■Never install closer than 3 m to pathways, down-
pipes or sealed surfaces. The cooled air in the dis-
charge area creates a risk of ice forming when out-
side temperatures are below 10 °C.
■The installation site must be easily accessible, for
example for maintenance work: See "Minimum clear-
ances".
Minimum clearances
A
B
b
d
ac
Fig. 2 Example type AWB/AWB-AC 201.B04
AAir intake
BAir discharge
Type AWB/AWB-AC Dimensions in mm
a b c d
Cable entry
above ground
level
below ground
level
201.B04 ≥ 100 ≥ 100 ≥ 400 ≥ 300 ≥ 1000
201.B07 ≥ 100 ≥ 100 ≥ 400 ≥ 300 ≥ 1000
201.B10 ≥ 100 ≥ 200 ≥ 400 ≥ 300 ≥ 1000
201.B13 ≥ 100 ≥ 200 ≥ 400 ≥ 300 ≥ 1000
201.C10 ≥ 100 ≥ 200 ≥ 400 ≥ 300 ≥ 1000
201.C13 ≥ 100 ≥ 200 ≥ 400 ≥ 300 ≥ 1000
Installation sequence
Installing the external unit (cont.)
5546 727 GB
Installation

10
Minimum clearances for heat pump cascade (max. 5 external units)
> 500
A
400
B
A
B
A
B
> 500 > 500 > 500 > 500
Fig. 3
AAir intake
BAir discharge
> 500
B
400 A
B
A
> 500 > 500
400
> 500
A
B
A
B
> 500 > 500
C
Fig. 4
AAir intake
BAir discharge
CPartition
> 500
B
> 1500
A
B
A
> 500 > 500
> 500
A
B
A
B
> 500 > 500
Fig. 5
AAir intake
BAir discharge
Transport and installation
!Please note
Avoid damaging the appliance during transport.
Never put weight on top of the appliance.
!Please note
If the compressor in the external unit is strongly
tilted, lubricant will enter the refrigerant circuit
and damage the appliance.
Note the max. tilting angle of 45°.
Installation sequence
Installing the external unit (cont.)
5546 727 GB
Installation

11
Floor mounting
2.
1.
4x
4x
A
B
C
E
D
Fig. 6
ASupport for floorstanding installation (accessories)
BGravel bed as condensate soakaway
CConcrete foundations (see technical guide)
DDrainage pipe DN 100 (only with entries below
ground level)
ERubber mounts (supplied)
Note
We recommend letting condensate drain away freely
(without condensate pipe).
Wall mounting
Installation must only be performed with the bracket
set suitable for wall mounting (accessory).
Separate installation instructions
Installation sequence
Installing the external unit (cont.)
5546 727 GB
Installation

12
!Please note
Avoid damaging the appliance during transpor-
tation.
Never put weight on top of the appliance.
Installation room requirements
!Please note
The installation room must be dry and free from
the risk of frost.
Ensure ambient temperatures between 0 and
35 °C.
!Please note
Avoid risks of explosion due to dust, gases and
vapours.
Avoid dust, gases and vapours in the installation
room.
Minimum room volume (to EN 378):
Type AWB/AWB-AC Minimum room vol-
ume in m3
201.B04 2.7
201.B07 4.8
201.B10 6.7
201.B13 6.7
201.C10 6.7
201.C13 6.7
Minimum clearances
100
1000
100
A B
Fig. 7
ACable entry <42 V
BCable entry 400 V~/230 V~, >42 V
Installation sequence
Installing the internal unit
5546 727 GB
Installation

13
Fitting the internal unit to the wall
2.
2x
3.
5.
1.
4.
Fig. 8
Connecting the refrigerant lines
■The external unit is pre-charged with refrigerant
R410A.
■In the following cases, fit oil lift bends in the rising
pipe:
–In heating mode, if the internal unit is installed
higher than the external unit: See diagram below.
–In cooling mode, if the internal unit is installed
lower than the external unit.
Routing the refrigerant lines
Type AWB/AWB-AC 201.B04 201.B07 201.B10
201.C10
201.B13
201.C13
Refrigerant lines
Min. line length 3 m 3 m 3 m 3 m
Max. line length 20 m 30 m 30 m 30 m
Max. height differential, internal unit – exter-
nal unit
10 m 15 m 15 m 15 m
Installation sequence
Installing the internal unit (cont.)
5546 727 GB
Installation

14
Note
No topping up is required for line lengths between
3 and 12 m.
internal unit above external unit
5000
5000
A
B
D
E
C
D
Fig. 9 Heating mode
AInternal unit
BHot gas line
CLiquid line
DExternal unit
EOil lift bends
Internal unit below external unit or at same level
CA B
D
Fig. 10 Heating mode
AInternal unit
BHot gas line
CLiquid line
DExternal unit
Installation sequence
Connecting the refrigerant lines (cont.)
5546 727 GB
Installation

15
Sound and vibration isolation when line entry is above ground level
Note
Route connecting cables and refrigerant lines sepa-
rately.
B
C
A
D
Fig. 11
Note
Only for 230 Vappliances
APipe bends for compensating vibrations
BTube clips with EPDM inserts
CLine entry, e.g. KG conduit with thermal insulation
DCables/leads between internal – external units
Installation sequence
Connecting the refrigerant lines (cont.)
5546 727 GB
Installation

16
Connection to the external unit
C
D
C
D
4.
2.
3.
2x
Fig. 12 Example type AWB/AWB-AC 201.B04
CLiquid line
DHot gas line
1. Type AWB/AWB-AC 201.B04 and 201.B07:
Remove the side cover: See page 31.
2. !Please note
Ensure that no contamination (e.g. metal
swarf) or moisture enters the copper pipes.
Therefore, hold the pipe openings down or
plug them.
Remove the nuts from connections C (liquid line)
and D (hot gas line) of the refrigerant lines.
Type AWB/AWB-AC 201.B04:
Slide the nuts onto the refrigerant lines prepared on
site.
Type AWB/AWB-AC 201.B07 to B13, C10, C13:
Replace nuts with union nuts supplied (internal
unit):
■⅝ UNF for liquid line
■⅞ UNF for hot gas line
3. Flare the pipe ends.
4. Secure the pipes.
Tighten the nuts with the following torque:
Type AWB/
AWB-AC
Cable Connection to exter-
nal unit
Torque in Nm
201.B04 Liquid line 7 6 mm ⁷⁄₁₆ UNF 14 to 18
Hot gas line 7 12 mm ¾ UNF 50 to 62
201.B07 Liquid line 7 10 mm ⅝ UNF 33 to 42
Hot gas line 7 16 mm ⅞ UNF 63 to 77
201.B10 Liquid line 7 10 mm ⅝ UNF 33 to 42
Hot gas line 7 16 mm ⅞ UNF 63 to 77
201.B13 Liquid line 7 10 mm ⅝ UNF 33 to 42
Hot gas line 7 16 mm ⅞ UNF 63 to 77
Installation sequence
Connecting the refrigerant lines (cont.)
5546 727 GB
Installation

17
Type AWB/
AWB-AC
Cable Connection to exter-
nal unit
Torque in Nm
201.C10 Liquid line 7 10 mm ⅝ UNF 33 to 42
Hot gas line 7 16 mm ⅞ UNF 63 to 77
201.C13 Liquid line 7 10 mm ⅝ UNF 33 to 42
Hot gas line 7 16 mm ⅞ UNF 63 to 77
Connection to the internal unit
2.
1.
3.
2x
DC
DCDC
Fig. 13
CLiquid line
DHot gas line
!Please note
Ensure that no contamination (e.g. metal swarf)
or moisture enters the copper pipes.
Therefore, hold the pipe openings down or plug
them.
Note
The refrigerant lines of the internal unit are filled with
nitrogen; overpressure 1 to 2 bar (0.1 to 0.2 MPa).
1. Remove the nuts from refrigerant connections C
and D.
Type AWB/AWB-AC 201.B04:
Replace nuts with union nuts supplied:
■⁷⁄₁₆ UNF for liquid line
■¾ UNF for hot gas line
Connect supplied reducer with copper sealing ring.
Type AWB/AWB-AC 201.B07 to B13, C10, C13:
Push the nuts onto the relevant refrigerant lines
from the external unit.
2. Flare the pipe ends of the refrigerant lines.
Note
If solder fittings are used, solder the fittings using a
shielding gas.
3. Fit refrigerant lines and insulate them to provide
protection from heat and vapour diffusion.
Installation sequence
Connecting the refrigerant lines (cont.)
5546 727 GB
Installation

18
Tighten the nuts with the following torque:
Type AWB/
AWB-AC
Cable Connection to inter-
nal unit
Torque in Nm
201.B04 Liquid line 7 6 mm ⅝ UNF
with reducer
33 to 42
⅝ x ⁷⁄₁₆ 14 to 18
Hot gas line 7 12 mm ⅞ UNF
with reducer
63 to 77
⅞ x ¾50 to 62
201.B07 Liquid line 7 10 mm ⅝ UNF 33 to 42
Hot gas line 7 16 mm ⅞ UNF 63 to 77
201.B10 Liquid line 7 10 mm ⅝ UNF 33 to 42
Hot gas line 7 16 mm ⅞ UNF 63 to 77
201.B13 Liquid line 7 10 mm ⅝ UNF 33 to 42
Hot gas line 7 16 mm ⅞ UNF 63 to 77
201.C10 Liquid line 7 10 mm ⅝ UNF 33 to 42
Hot gas line 7 16 mm ⅞ UNF 63 to 77
201.C13 Liquid line 7 10 mm ⅝ UNF 33 to 42
Hot gas line 7 16 mm ⅞ UNF 63 to 77
Connecting the secondary circuit
+
Fig. 14
Refrigerant lines from/to the external unit
Symbol Meaning Connection
DHW cylinder flow (heating water side) G 1¼
+
Heating water return and DHW cylinder return G 1¼
Heating water flow G 1¼
1. Equip the secondary circuit on site with an expan-
sion vessel and safety assembly (in accordance
with DIN 4757).
Fit the safety assembly to the on-site line in the
heating water return (see page 45).
2. Connect the secondary circuit lines to the heat
pump.
Installation sequence
Connecting the refrigerant lines (cont.)
5546 727 GB
Installation

19
!Please note
Avoid appliance damage.
Connect on-site secondary circuit lines to the
heat pump so they are free of load and tor-
que stress.
Make tight hydraulic connections on the sec-
ondary side.
3. Fill and vent the secondary circuit.
!Please note
Liquid inside the appliance can cause appli-
ance damage.
The secondary circuit air vent valve is loca-
ted inside the appliance. To vent, connect the
hose to the air vent valve and route out-
wards.
4. Thermally insulate pipes inside the building.
5. Connect the drain hose to the safety valve.
Connect the drain hose to the public sewage sys-
tem with a fall and a pipe vent.
Note
■With underfloor heating circuits, install a temperature
limiter to restrict the maximum temperature of under-
floor heating systems: See page 23.
■Ensure the minimum flow rate, e.g. by means of an
overflow valve: See "Specification" on page 95.
Connecting a cooling circuit if required
For area cooling systems (e.g. underfloor heating cir-
cuit, chilled ceiling), a contact humidistat (accessory) is
required.
Requirements for the contact humidistat:
■Electrical connection: 230 V~, 0.5 A
■Installation inside the room to be cooled at the cool-
ing water flow (remove thermal insulation if required)
■If several rooms with different relative humidity are
part of the cooling circuit, fit and connect several
contact humidistats in series:
Switching contacts as N/C contacts
Electrical connection
Danger
Damaged cable insulation can cause injury and
damage to the appliance.
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.
Observe the following when making the electri-
cal connection:
■Route LV leads < 42 V and > 42 V/230 V~/400 V~
cables separately.
■Only strip the minimum of insulation from cables just
ahead of the terminals and bundle them tightly and
close to the corresponding terminals.
■Secure cables with cable ties.
■If 2 components are connected to the same terminal,
press both cores together in a single wire ferrule.
This prevents wires from drifting into the adjacent volt-
age area in the event of fault (e.g. when a wire comes
loose).
!Please note
In terms of safety, the BUS cable for the internal/
external unit (12 V or 43 V) does not count as a
LV lead.
The BUS cable must be routed together with
the 230 V cables.
Note
Make all connections on the control panel, (see
page 21) with flexible cables to ensure that the con-
trol panel can be placed in the service position (see
page 57).
Installation sequence
Connecting the secondary circuit (cont.)
5546 727 GB
Installation

20
Internal unit: Routing the cables to the wiring chamber
A
B
< 42V
!
230V
400V
> 42V
Fig. 15
AType AWB/AWB-AC 201.B10, B13, C10, C13:
12 V BUS cable: Routing in the 230 V~ voltage
range (connection, see page 31)
BType AWB/AWB-AC 201.B04 and 201.B07:
43 V BUS cable: Routing in the 230 V~ voltage
range (connection, see page 31)
Installation sequence
Electrical connection (cont.)
5546 727 GB
Installation