Viessmann Vitocal 222-A Quick guide

Installation and service instructions
for contractors
VIESMANN
Vitocal 222-A
Type AWOT(-M)-E/AWOT(-M)-E-AC 221.A04 to A16
Heat pump compact appliance, monoblock version
VITOCAL 222-A
5831412 GB 3/2018 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 can cause burns.
■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
5831412

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
Safety instructions (cont.)
5831412

4
1. Information Disposal of packaging ............................................................................ 6
Symbols ................................................................................................. 6
Intended use .......................................................................................... 6
Product information ................................................................................ 7
2. Preparing for installation Requirements for on-site connections ................................................... 9
■Indoor unit ........................................................................................... 9
■Outdoor unit ........................................................................................ 10
3. Installation sequence Installing the outdoor unit ....................................................................... 12
■Installation information ........................................................................ 12
■Installation location ............................................................................. 13
■Outdoor unit minimum clearances ...................................................... 14
■Transport and siting ............................................................................ 15
■Floorstanding installation .................................................................... 15
■Wall mounting ..................................................................................... 19
■Opening the wiring chamber ............................................................... 21
■Removing the transport brackets ........................................................ 22
■Connecting the supplied hoses .......................................................... 23
Installing the indoor unit ......................................................................... 23
■Transport ............................................................................................ 23
■Requirements for the installation room ............................................... 24
■Minimum clearances ........................................................................... 24
■Minimum room height ......................................................................... 25
■Pressure points ................................................................................... 25
Connecting the secondary circuit ........................................................... 26
■Preparing connections on the heating water side ............................... 26
■Preparing the connections on the DHW side ...................................... 26
■Connecting the secondary side .......................................................... 27
Aligning the indoor unit .......................................................................... 29
Type AWOT(-M)-E-AC only: Connecting the cooling circuit .................. 29
Removing the front panels ..................................................................... 30
Electrical connection .............................................................................. 31
■Preparing the electrical connections ................................................... 31
■Indoor unit: Routing cables to the wiring chamber ............................. 32
■Connecting the Vitoconnect (accessories) ......................................... 33
■Indoor unit: Overview of connections ................................................. 35
■Indoor unit: Main PCB (230 V~ components) ..................................... 36
■Indoor unit: Expansion PCB on main PCB (230 V~ components) ...... 38
■Indoor unit: Luster terminals (signal and safety connections) ............ 40
■Indoor unit: Controller and sensor PCB (LV connections) .................. 41
■Outdoor unit: Routing cables to the wiring chamber ........................... 43
■Outdoor unit: Overview of electrical connections ............................... 44
■Connecting Modbus cable between indoor unit and outdoor unit ....... 45
Power supply ......................................................................................... 46
■Heat pump control unit power supply 230 V~ ..................................... 47
■Outdoor unit power supply .................................................................. 47
■Instantaneous heating water heater power supply ............................. 50
■Power supply with power-OFF: Without on-site load disconnection ... 51
■Power supply with power-OFF: With on-site load disconnection ........ 52
■Mains power supply in conjunction with on-site power consumption . 54
■Smart Grid .......................................................................................... 54
Closing the heat pump ........................................................................... 56
■Fitting the front panels of the indoor unit ............................................ 56
■Fitting the side cover for the outdoor unit ........................................... 57
4. Commissioning, inspec-
tion, maintenance
Steps - commissioning, inspection and maintenance ............................ 58
5. Maintenance Overview of electrical components ........................................................ 79
Index
Index
5831412

5
Indoor unit: Opening the programming unit ........................................... 79
Indoor unit: Placing the control unit panel in its service position ........... 80
Overview of internal components: Indoor unit ....................................... 81
Overview of internal components: Outdoor unit ..................................... 82
■Outdoor units, types 221.A04 to A08 .................................................. 83
■Outdoor units, types 221.A10 to A16 .................................................. 84
Draining the heat pump on the secondary side ..................................... 85
Checking the temperature sensors ........................................................ 85
■Connection to the indoor unit .............................................................. 85
■Connection to the outdoor unit ........................................................... 86
■Indoor unit: Viessmann NTC 10 kΩ (blue marking) ............................ 87
■Indoor unit: Viessmann NTC 20 kΩ (orange marking) ........................ 88
■Indoor unit: Viessmann Pt500A (green marking) ................................ 89
■Outdoor unit: Viessmann NTC 10 kΩ (no marking) ............................ 90
Checking the fuses ................................................................................ 90
6. Indoor unit parts lists Overview of indoor unit assemblies ....................................................... 93
Indoor unit casing .................................................................................. 94
Indoor unit electrical equipment ............................................................. 96
Hydraulics, indoor unit ........................................................................... 98
Indoor unit DHW cylinder .......................................................................100
Miscellaneous ........................................................................................ 102
7. Outdoor unit parts list
230 V~, types 221.A04 to
A08
Overview of assemblies, outdoor unit 230 V~ ....................................... 105
Outdoor unit casing 230 V~ ................................................................... 106
Outdoor unit refrigerant circuit 230 V~ ...................................................108
Outdoor unit electrical equipment 230 V~ ............................................. 110
8. Outdoor unit parts list
230 V~, types 221.A10
to .A16
Overview of assemblies, outdoor unit 230 V~ ....................................... 113
Outdoor unit casing 230 V~ ................................................................... 114
Outdoor unit refrigerant circuit 230 V~ ...................................................116
Outdoor unit electrical equipment 230 V~ ............................................. 118
9. Outdoor unit parts list
400 V~, types 221.A10
to .A16
Overview of assemblies, outdoor unit 400 V~ ....................................... 121
Outdoor unit casing 400 V~ ................................................................... 122
Outdoor unit refrigerant circuit 400 V~ ...................................................124
Outdoor unit electrical equipment 400 V~ ............................................. 126
10. Commissioning/service
reports
Hydraulic parameter report .................................................................... 128
Control parameter report ....................................................................... 128
11. Specification ................................................................................................................139
12. Appendix Commissioning order .............................................................................147
Final decommissioning and disposal ..................................................... 147
13. Certificates Declaration of conformity ....................................................................... 148
14. Keyword index ................................................................................................................149
Index
Index (cont.)
5831412

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
5831412
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
Layout
The Vitocal 222-A is a monoblock compact heat pump
appliance, comprising 1 indoor unit with integral DHW
cylinder and 1 outdoor unit.
Required accessories
A "hydraulic connection set, heating circuit for installa-
tion on finished walls" is required to install the appli-
ance.
Refrigerant circuit
All components of the refrigerant circuit are located in
the outdoor unit, including the refrigerant circuit con-
troller with electronic expansion valve. Subject to oper-
ating conditions, compressor output is matched via
inverter control.
For central cooling, the refrigerant circuit is reversed
(only types with designation "-AC").
Hydraulics
The indoor and outdoor units are connected to each
other hydraulically on the secondary side.
The hydraulic components for the secondary circuit are
located in the indoor unit. The heated heating water is
pumped into the secondary circuit by the integral high
efficiency circulation pump (secondary pump). The
integral 3-way diverter valve for "central heating/DHW
heating" changes over between central heating and
DHW heating.
System without buffer cylinder
■Central heating
The heat pump heats 1 heating/cooling circuit with-
out mixer.
■Central cooling
The heat pump cools through 1 heating/cooling cir-
cuit without mixer or through a separate cooling cir-
cuit.
In conjunction with installation kit with mixer
(accessories)
■Central heating
The heat pump heats 1 heating/cooling circuit with-
out mixer and 1 heating circuit with mixer.
To heat the heating circuit with mixer, the heating/
cooling circuit without mixer must be connected.
■Central cooling
The heat pump can only cool through the heating/
cooling circuit without mixer.
System with heating water buffer cylinder
■Central heating
The heat pump heats up to 3 heating/cooling circuits:
1 heating/cooling circuit without mixer and 2 heating/
cooling circuits with mixer
■Central cooling
The heat pump can only cool either through one of
the max. 3 heating/cooling circuits or through a sepa-
rate cooling circuit.
The heating water buffer cylinder is bypassed
hydraulically by a bypass circuit.
System with heating water/coolant buffer cylinder
■Central heating
The heat pump can heat up to 3 heating/cooling cir-
cuits: 1 heating/cooling circuit without mixer and
2 heating/cooling circuits with mixer
■Central cooling
The heat pump can cool through up to 3 heating/
cooling circuits. Central cooling via a separate cool-
ing circuit is not possible.
Heat pump control unit
The entire heating system is monitored and controlled
by heat pump control unit Vitotronic 200, type WO1C.
The heat pump control unit is integrated into the indoor
unit. The indoor and outdoor units communicate via
Modbus.
Information
Intended use (cont.)
5831412
Information

8
Type overview
Type Instantaneous heat-
ing water heater
Cooling function Rated voltage
Indoor unit Outdoor unit
AWOT-E 221.A X –230 V~ 400 V~
AWOT-M-E 221.A X –230 V~ 230 V~
AWOT-E-AC 221.A X X 230 V~ 400 V~
AWOT-M-E-AC 221.A X X 230 V~ 230 V~
System examples
For available system examples, see www.viessmann-
schemes.com
Information
Product information (cont.)
5831412
Information

9
Indoor unit
1874
1904
1295 1448
1523
1598
1673
1748
1908
600
677
42
149
681
A
B
C
D
E
A BC D E
FG
A
B
C
D
E
FG
110
38
H
H
150
225
300
375
450
148
148
209
C D E
G
F
A B
Fig. 1
AHeating water return G 1¼ (female thread)
BCold water G ¾ (female thread)
CDHW circulation G ¾ (female thread)
DDHW G ¾ (female thread)
EHeating water flow G 1¼ (female thread)
FReturn, outdoor unit (heating water outlet) G 1¼
(union nut DN 32, female thread)
Preparing for installation
Requirements for on-site connections
5831412
Installation

10
GFlow, outdoor unit (heating water outlet) G 1¼
(union nut DN 32, female thread)
HCable entry for electrical cables on the back of the
appliance:
■LV leads < 42 V
■Power cables 400 V~/230 V~
1. Prepare the connections on the heating water and
the DHW side.
Flush the heating system.
2. Prepare the electrical connections.
Outdoor unit
Outdoor units, types 221.A04 to A08
1109
126
508
536
545
62
705
753
544
110
165
590
637
133
176
223
48
518
A
D
C
B
A
B
C D
/
Fig. 2
AOutdoor unit flow (heating water outlet) G 1¼
(union nut supplied, female thread)
BOutdoor unit return (heating water outlet) G 1¼
(union nut supplied, female thread)
CPower cable inlet
DModbus cable inlet for indoor/outdoor unit
Preparing for installation
Requirements for on-site connections (cont.)
5831412
Installation

11
Outdoor units, types 221.A10 to A16
1109
705
62
110
165
508
544
536
545
1377
126
133
176
223
590
637
48
518
A
D
C
B
A
B
C D
/
Fig. 3
AOutdoor unit flow (heating water outlet) G 1¼
(union nut supplied, female thread)
BOutdoor unit return (heating water outlet) G 1¼
(union nut supplied, female thread)
CPower cable inlet
DModbus cable inlet for indoor/outdoor unit
Preparing for installation
Requirements for on-site connections (cont.)
5831412
Installation

12
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 out-
door unit freestanding on a solid base of
at least 100 mm height.
■In difficult climatic circumstances (temperatures
below zero, snow, humidity), we recommend instal-
ling the appliance on a plinth of approx. 300 mm
height.
■Take account of the weight of the outdoor unit: See
following table.
Wall mounting:
■Use the wall mounting bracket set (accessories).
■The wall must meet the structural requirements.
Siting:
■Never install with the discharge side facing the main
wind direction.
Weather influences:
■Observe wind loads when installing the unit on sites
exposed to the wind.
Where outdoor units are installed on a flat roof, con-
siderable wind loads may occur, depending on the
relevant wind load zone and height of the building.
For such installation situations we recommend hav-
ing the substructure sized by a design engineer in
accordance with DIN 1991-1-4.
■Incorporate the outdoor unit into the lightning protec-
tion system.
■Consider the heat absorbed (heating mode) and heat
emitted (cooling mode) by the appliance when
designing weatherproofing measures or an enclo-
sure.
Condensate:
■Ensure that condensate can drain freely.
Create a permanent gravel bed under the outdoor
unit as a soakaway.
■In regions with prolonged cold seasons, provide an
electric ribbon heater (accessories) for the conden-
sate pan.
Insulation against structure-borne noise and vibra-
tions between the building and outdoor unit:
■Route cables/leads between the indoor and outdoor
units free of stress.
■Installation only on walls with a high weight per unit
area (> 250 kg/m2); in other words not on lightweight
walls, roof structures, etc.
■Anti-vibration components are included in the stand-
ard delivery of the wall mounting brackets. Do not
use additional anti-vibration mounts, springs, rubber
mounts, etc.
Installation sequence
Installing the outdoor unit
5831412
Installation

13
Weight of outdoor units
Vitocal 200-A Type Weight in kg
230 V appliances ■AWOT-M-E
■AWOT-M-E-AC
221.A04 102
221.A06 102
221.A08 103
221.A10 145
221.A13 145
221.A16 145
400 V appliances ■AWOT-E
■AWOT-E-AC
221.A10 153
221.A13 153
221.A16 153
Installation location
■Select a site with good air circulation, so that the
cooled air can dissipate and be replaced by warm
air.
■Never install in the corners of rooms, 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 mode 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 mode will
result in the heated, discharged air re-entering
the unit. This can lead to high pressure faults.
Avoid "air short circuits".
■If siting the appliance in a location that is exposed to
wind, ensure that the wind cannot influence the fan
area. Strong wind can have a negative influence on
the air flow through the evaporator.
■Select an installation location where the evaporator
cannot be blocked by leaves, snow, etc.
■Select the installation location giving due considera-
tion to the physical laws concerning the propagation
and reflection of sound.
Technical guide
■Never install next to or below bedroom windows.
■Maintain a clearance of at least 3 m to pathways,
downpipes or sealed surfaces. The cooled air in the
discharge area creates a risk of ice forming when
outside temperatures are below 10 °C.
■The installation location must be easily accessible,
for example for maintenance work: See "minimum
clearances".
Installation sequence
Installing the outdoor unit (cont.)
5831412
Installation

14
Outdoor unit minimum clearances
Types 221.A04 to A08
BA
1000 a
A
B
a
100 300
1000
200
Fig. 4
AAir intake
BAir discharge
a■Line entry above ground level:
≥ 200 mm
■Line entry below ground level:
≥ 900 mm
Installation sequence
Installing the outdoor unit (cont.)
5831412
Installation

15
Types 221.A10 to A16, 230 V~ and 400 V~
BA
1000 a
A
B
a
100 300
1000
200
Fig. 5
AAir intake
BAir discharge
a■Line entry above ground level:
≥ 200 mm
■Line entry below ground level:
≥ 900 mm
Transport and siting
!Please note
Impacts, compression and tensile loads can
cause damage to the outside panels of the
appliance.
Never apply loads/weight to the top, front or
side panels of the appliance.
!Please note
If the compressor in the outdoor unit is strongly
tilted, lubricant will enter the refrigerant circuit
and damage the appliance.
Max. tilting angle: 45° for approx. 4 min, other-
wise 30°
Floorstanding installation
Foundations
Fit the floor supports on 2 horizontal foundation strips.
We recommend the construction of concrete founda-
tions in accordance with the following diagram. The
stated thickness of the layers represents an average
value. These values should be adjusted to suit the
local conditions. Follow the standard rules of building
engineering.
Installation sequence
Installing the outdoor unit (cont.)
5831412
Installation

16
C
702
66 66
50 50
150150
D
B
B
709
60
155
E
D
300
1100
D
1200
C
A
B
B
E
Fig. 6
AFrost protection for foundations (compacted
crushed stone, e.g. 0 to 32/56 mm); thickness of
layer subject to local requirements and building
regulations
BFoundation strip
CGravel bed as condensate soakaway
DFixing points for floorstanding installation supports
EOnly for line entry below ground level: Hydraulic
connection set (accessories)
Installation sequence
Installing the outdoor unit (cont.)
5831412
Installation

17
Floorstanding installation with support; line entry
above ground level
3000
A
200
300
K
702
835
EF
1100
C D
200
L
BG
H
500 180
Fig. 7
AGround
BPathway, patio
CHydraulic connection lines, indoor/outdoor unit
DIndoor/outdoor unit Modbus cable and outdoor unit
power cable:
Route the cables so they are not stressed.
EOpenings in the base plate for free drainage of
condensate:
Never seal the openings.
FConnection set, wall mounting (accessories)
GSupport for floorstanding installation (accessories)
HFoundation strip
KFrost protection for foundations (compacted
crushed stone, e.g. 0 to 32/56 mm); thickness of
layer subject to local requirements and building
regulations
LFlexible separating layer between the foundations
and the building
Installation sequence
Installing the outdoor unit (cont.)
5831412
Installation

18
Floorstanding installation with support; line entry below ground level
300
K
835
1100
3000
B
A
D
702
H
E
900
CF
G
200
Fig. 8
AGround
BPathway, patio
CSupport for floorstanding installation (accessories)
DOpenings in the base plate for free drainage of
condensate:
Never seal the openings.
EIndoor/outdoor unit Modbus cable and outdoor unit
power cable:
Route the cables so they are not stressed.
FFloorstanding installation connection set (accesso-
ries)
GHydraulic connection set (accessories)
HFoundation strip
KFrost protection for foundations (compacted
crushed stone, e.g. 0 to 32/56 mm); thickness of
layer subject to local requirements and building
regulations
Installation sequence
Installing the outdoor unit (cont.)
5831412
Installation

19
Installing an outdoor unit on foundations
A
B
C
D
1.
4x
4x
2.
Fig. 9
ASupport for floorstanding installation (accessories)
BGravel bed as condensate soakaway
CConcrete foundations (see technical guide)
DOnly for line entry below ground level: Hydraulic
connection set (accessories)
Note
We recommend letting condensate drain away freely
(no condensate pipe).
Wall mounting
Installation should only be performed with the bracket
set for wall mounting (accessories).
Separate installation instructions
Installation sequence
Installing the outdoor unit (cont.)
5831412
Installation

20
Wall mounting with bracket set
C D
300
G
F
B
200
A
E
200
220 180
Fig. 10
AGravel bed as condensate soakaway
BAnti-vibration mounts (standard delivery of
bracket)
CHydraulic connection lines, indoor/outdoor unit
DIndoor/outdoor unit Modbus cable and outdoor unit
power cable:
Route the cables so they are not stressed.
EConnection set, wall mounting (accessories)
FOpenings in the base plate for free drainage of
condensate:
Never seal the openings.
GBracket for wall mounting (accessories)
Installation sequence
Installing the outdoor unit (cont.)
5831412
Installation