Viessmann Vitocal 222-S Guida rapida

Installation and service

instructions

for contractors

VIESMANN

Vitocal 222-S

Type AWT-AC 221.A04 to A13, B10, B13

Compact heat pumps, split version for heating and cooling opera-

tion

For applicability, see the last page

VITOCAL 222-S

5782 201 GB 2/2013 Please keep safe.

Please follow these safety instructions closely to prevent accidents and mate-

rial 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 envi-

ronmental pollution.

Note

Details identified by the word "Note" con-

tain additional information.

Target group

These instructions are exclusively inten-

ded for qualified 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 elec-

trician.

■ The system must be commissioned by

the system installer or a qualified per-

son 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 envi-

ronmental protection

■ 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 sup-

ply (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 recon-

nection.

Safety instructions

5782 201 GB

!Please note

Electronic assemblies can be

damaged by electrostatic dis-

charge.

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 function can compromise

the safe operation of your sys-

tem.

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 tested together

with the system can compromise

its function. Installing non-author-

ised components and making

non-approved modifications or

conversions can compromise

safety and may invalidate our

warranty.

For replacements, use only spare

parts supplied or approved by

Viessmann.

Safety instructions

Safety instructions (cont.)

5782 201 GB

Installation instructions

Preparing for installation

Intended use......................................................................................................... 6

Requirements regarding on-site connections....................................................... 7

Installation sequence

Installing the external unit..................................................................................... 10

Installing the internal unit...................................................................................... 14

Connecting refrigerant lines................................................................................. 23

Connecting the secondary circuit......................................................................... 32

Connections on the DHW side............................................................................. 35

Connecting a cooling circuit if required................................................................ 36

Electrical connections........................................................................................... 36

Power supply........................................................................................................ 52

Closing the heat pump......................................................................................... 60

Service instructions

Commissioning, inspection, maintenance

Steps - commissioning, inspection and maintenance.......................................... 61

Further details regarding the individual steps....................................................... 63

Troubleshooting

Repairs................................................................................................................. 87

Parts lists, internal unit

Ordering individual parts...................................................................................... 99

Overview of assemblies, internal unit................................................................... 100

Parts not shown, internal unit............................................................................... 101

Internal unit casing............................................................................................... 101

Electrical equipment, internal unit........................................................................ 103

Internal unit hydraulics......................................................................................... 105

Cylinder, internal unit............................................................................................ 107

Parts lists for external unit 230 V~, type AWT-AC 221.A04

Ordering individual parts...................................................................................... 109

External unit......................................................................................................... 109

Parts lists for external unit 230 V~, type AWT-AC 221.A07

Ordering individual parts...................................................................................... 111

External unit......................................................................................................... 111

Index

5782 201 GB

Parts lists for external unit 230 V~, type AWT-AC 221.A10, A13

Ordering individual parts...................................................................................... 113

Overview of the assemblies................................................................................. 114

External unit casing.............................................................................................. 115

Electrical equipment, external unit....................................................................... 117

Hydraulics, external unit....................................................................................... 119

Parts lists for external unit 400 V~, type AWT-AC 221.B10, B13

Ordering individual parts...................................................................................... 121

Overview of the assemblies................................................................................. 122

External unit casing.............................................................................................. 123

Electrical equipment, external unit....................................................................... 125

Hydraulics, external unit....................................................................................... 127

Commissioning/service reports

Hydraulic parameter report................................................................................... 129

Control parameters report.................................................................................... 129

Specification....................................................................................................... 136

Appendix

Commissioning order........................................................................................... 146

Declaration of conformity.................................................................................. 147

Keyword index.................................................................................................... 148

Index

Index (cont.)

5782 201 GB

The appliance is only intended to be

installed and operated in sealed unven-

ted heating systems that comply with

EN 12828, with due attention paid to the

associated installation, service and

operating instructions.

Depending on the version, the appliance

can only be used for the following pur-

poses:

■ Central heating

■ Central cooling

■ DHW heating

The range of functions can be extended

with additional components and acces-

sories.

Intended use presupposes that a fixed

installation in conjunction with permissi-

ble, system-specific components has

been carried out.

Commercial or industrial usage for a pur-

pose other than central heating/cooling

or DHW heating shall be deemed inap-

propriate.

Any usage beyond this must be

approved by the manufacturer for the

individual case.

Incorrect usage or operation of the appli-

ance (e.g. the appliance being opened

by the system user) is prohibited and

results in an exclusion of liability. Incor-

rect 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 oper-

ate the appliance safely.

Preparing for installation

Intended use

5782 201 GB

Internal unit

1800

134

159

454

564

666

680

1803

1829

600

405

147

62 300

387

475

506

AOpening for LV leads < 42 V BDHW

Preparing for installation

Requirements regarding on-site connections

5782 201 GB

Installation

CDHW circulation

DOpening for 230 V cables

ECold water

FLiquid line

GHot gas line

HHeating water flow

KHeating water return

Connection sizes for hydraulic connections

Pos Sym-

bol

Meaning Connections to the internal unit

B– DHW Rp ¾

C– DHW circulation G 1

E– Cold water Rp ¾

FRefrigerant lines from/to

the external unit:

■ Liquid line 7 connection pipe:

(supplied pipe bends)

10 mm

UNF thread: ⅝

For type AWT-AC 221.A04, a reduction

from 10 to 6 mm is necessary down-

stream of the pipe bend (reducer ⅝ to ⁷⁄₁₆

supplied).

G■ Hot gas line 7 connection pipe:

(supplied pipe bends)

16 mm

UNF thread: ⅞

For type AWT-AC 221.A04, a reduction

from 16 to 10 mm is necessary down-

stream of the pipe bend (reducer ⅞ to

¾ supplied).

HHeating water flow Cu 28 x 1 mm

KHeating water return Cu 28 x 1 mm

1. Prepare the connections on the heat-

ing water and the DHW side.

Flush the heating system.

2. Prepare the electrical connections.

Preparing for installation

Requirements regarding on-site connections (cont.)

5782 201 GB

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 AWT-AC 221.A04 to A13, B10, B13

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

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 AWT-AC 221.A04 221.A07 221.A10 221.A13

External unit 230 V~ (compres-

sor)

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 AWT-AC 221.B10 221.B13

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.)

5782 201 GB

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 requirements

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 in a location

exposed to wind, ensure that the wind

does not affect the fan area. This could

result in an "air short circuit" between

the air being discharged and the air

being drawn in. Strong wind can have

a negative influence on the evaporator

ventilation.

!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 prob-

lems.

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 pressure faults.

Avoid "air short circuits".

■ Take the lengths of the refrigerant

lines into account (see "Connecting

refrigerant lines").

■ Select the installation site so that the

evaporator cannot be blocked by

leaves, snow etc.

■ Select the installation site with due

consideration of the physical laws of

sound dissipation and reflection.

Technical guide "Heat pump

principles"

■ Never site in corners, recesses or

between walls.

■ Never install next to or below bedroom

windows.

■ Never install closer than 3 m to path-

ways, downpipes or sealed surfaces.

The cooled air in the discharge area

creates a risk of ice forming when out-

side temperatures fall below 10 °C.

■ The installation site should be easily

accessible, for example for mainte-

nance work (see "Minimum clearan-

ces").

Installation sequence

Installing the external unit

5782 201 GB

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