Viessmann Vitocal 350-G Guida rapida

Installation and service

instructions

for contractors

VIESMANN

Vitocal 350-G

Type BW/WW 351.A07

Type BWS 351.A07

Heat pumps with electric drive, 1 and 2-stage

Type BWC/WWC 351.A07

Heat pumps with electric drive, 1-stage

For applicability, see the last page

VITOCAL 350-G

5609 667 GB 5/2013 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

5609 667 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.)

5609 667 GB

Installation instructions

Preparing for installation

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

Product information.............................................................................................. 6

General information on the electrical connection................................................. 8

Siting.................................................................................................................... 8

Overview of possible system schemes................................................................ 13

Designations in the system examples.................................................................. 14

Primary circuit, type BW/BWC (brine/water)........................................................ 15

Primary circuit, type WW/WWC (water/water)...................................................... 17

Primary circuit, type BW + BWS (2-stage, brine/water)....................................... 20

Primary circuit, type WW + BWS (2-stage, water/water)...................................... 25

DHW heating........................................................................................................ 33

Integration of 2-stage version............................................................................... 39

Heat pump cascade integration............................................................................ 41

System example 1, ID: 4605350_1008_01.......................................................... 45

System example 2, ID: 4605351_1008_01.......................................................... 51

System example 3, ID: 4605352_1008_01.......................................................... 57

Installation sequence

Siting the heat pump............................................................................................ 67

Hydraulic connections.......................................................................................... 69

Electrical connections........................................................................................... 71

Power supply........................................................................................................ 98

Connecting to terminals X3.8/X3.9....................................................................... 106

Closing the heat pump......................................................................................... 107

Checking diaphragm grommets........................................................................... 108

Service instructions

Commissioning, inspection, maintenance

Steps - commissioning, inspection and maintenance.......................................... 109

Further details regarding the individual steps....................................................... 110

Troubleshooting

Maintenance......................................................................................................... 123

Parts lists

Spare parts lists, type BW/WW............................................................................ 130

Overview of assemblies, type BW/WW................................................................ 131

Parts not shown, type BW/WW ........................................................................... 132

Casing assembly, type BW/WW .......................................................................... 132

Electrical equipment, type BW/WW...................................................................... 134

Index

5609 667 GB

Heat pump module, type BW/WW........................................................................ 136

Hydraulics, type BW/WW .................................................................................... 138

Parts lists, type BWS............................................................................................ 140

Overview of assemblies, type BWS .................................................................... 141

Parts not shown, type BWS.................................................................................. 142

Casing assembly, type BWS................................................................................ 142

Electrical equipment, type BWS........................................................................... 144

Heat pump module, type BWS............................................................................. 146

Hydraulics, type BWS........................................................................................... 148

Parts lists, type BWC/WWC 351.A07................................................................... 150

Overview of assemblies, type BWC/WWC........................................................... 151

Parts not shown, type BWC/WWC....................................................................... 152

Casing, type BWC/WWC...................................................................................... 152

Electrical equipment, type BWC/WWC................................................................ 154

Heat pump module, type BWC/WWC ................................................................. 156

Hydraulics, type BWC/WWC................................................................................ 158

Commissioning/service reports........................................................................ 160

Specification

Specification for brine/water heat pumps............................................................. 167

Specification for water/water heat pumps............................................................ 171

Appendix

Heat pump commissioning order.......................................................................... 175

Certificates

Declaration of conformity...................................................................................... 176

Keyword index.................................................................................................... 177

Index

Index (cont.)

5609 667 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.

Product information

Type BW/BWC 351.A07

Brine/water heat pump with heat pump

control unit Vitotronic 200, type WO1B

for central heating/cooling and DHW

heating. Cooling is carried out via a heat-

ing circuit prepared for cooling operation

or a separate cooling circuit.

The refrigerant circuit has an electronic

expansion valve (EEV) with an inde-

pendent control circuit (EEV controller).

For central heating and DHW heating, an

instantaneous heating water heater

(accessories) can also be switched.

For type BWC 351.A07, the primary

pump, secondary pump and circulation

pump for cylinder heating are integrated.

For type BW 351.A07, these pumps are

available as accessories.

The output of type BW 351.A07 can be

extended with a heat pump stage 2

(type BWS).

Preparing for installation

Intended use

5609 667 GB

Type WW/WWC 351.A07

The brine/water heat pump type BW/

BWC 351.A07 in conjunction with the

conversion kit (accessories) becomes

water/water heat pump

type WW/WWC 351.A07. A separate

well circuit supplies the primary circuit

with heating energy via a separating heat

exchanger (accessories). The compo-

nents of the well and primary circuit are

switched by the heat pump control unit.

Type BWS 351.A07 (heat pump stage 2)

The heat pump stage 2 has a separate

refrigerant circuit with EEV controller, but

no separate heat pump control unit.

Stage 2 is switched via the heat pump

control unit of stage 1.

Depending on the hydraulic connection,

the heat pump stage 2 can be used both

for central heating and for DHW heating.

A separate secondary pump and circu-

lation pump for cylinder heating (both

accessories) are required for the heat

pump stage 2.

With the 2-stage version, either a sepa-

rate primary pump can be used for both

stages, or a common primary pump can

be used on the primary side. Irrespective

of this, the flow and return temperature

sensors are installed in the primary cir-

cuit at the common flow and return.

Heat pump stage 2 must be installed to

the left of the heat pump stage 1.

The hydraulic connection can be carried

out with hydraulic modules (accesso-

ries).

Preparing for installation

Product information (cont.)

5609 667 GB

Installation

■Connecting cables, heat pump

stage 1 – stage 2:

See page 75.

■Electrical connection of system

components (pumps, mixers, valves,

alarm facilities, contactors, function

extensions, sensors etc.):

These connections are made inside

the heat pump control unit. Observe

information from page 76.

■Power supply:

The number of power cables from the

distribution board (meter box) to the

heat pump control unit depends on the

system version and tariffs used; see

information from page 98.

Siting

!Please note

Avoid damaging the appliance

during transportation.

Never put weight on top of the

appliance.

!Please note

If the compressor is at a steep

angle in the heat pump, lubricant

will enter the refrigerant circuit

and damage the appliance.

Max. tilting angle 45°.

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

Dust, gases and vapours can

cause an explosion.

Never allow these substances in

the installation room.

!Please note

Observe the permissible floor

load.

■Total weight

Type Weight

BW 351.A07 136 kg

BWS 351.A07 132 kg

BWC 351.A07 146 kg

■ To prevent the transmission of struc-

ture-borne noise, never site the appli-

ance on ceilings with wooden joists

(e.g. in the attic).

■ Level the appliance.

If the adjustable feet are used to com-

pensate for an uneven floor (max.

10 mm), the pressure load on the feet

must be distributed evenly.

Preparing for installation

General information on the electrical connection

5609 667 GB

■ Observe the required floor area and

minimum room volume (to EN 378).

Type Min. room

volume

BW 351.A07 9.4 m3

BWS 351.A07 9.4 m3

BWC 351.A07 9.4 m3

■ Observe required minimum clearan-

ces:

Single stage (type BW/BWC 351.A07)

≥ 400

≥ 1500

Two-stage (type BW 351.A07 + BWS 351.A07)

= 100

≥ 400

≥ 1500

A■ With hydraulic module (acces-

sory, for installation above the

heat pump):

340 mm

■ Without hydraulic module:

Subject to on-site installation and

site conditions

B■ With AC-Box (accessory, for

installation to the left of the heat

pump):

≥ 400 mm (+ width of the AC-Box)

■ Without AC-Box:

≥ 100 mm

Preparing for installation

Siting (cont.)

5609 667 GB

Installation

Information on the use of accessories

for a heating/cooling circuit or sepa-

rate cooling circuit

AC-Box for active cooling function

■ The AC-Box can only be used up to a

rated heating output of ≤ 17.6 kW. For

higher rated heating outputs, install all

the components required on site (with

correspondingly sized plate heat

exchanger) for the heating/cooling cir-

cuit or the separate cooling circuit.

NC-Box for natural cooling function

■ The NC-Box can only be used up to a

rated heating output of ≤ 16 kW. For

higher rated heating outputs, install all

the components required on site (with

correspondingly sized plate heat

exchanger) for the heating/cooling cir-

cuit or the separate cooling circuit.

■ In 2-stage heat pumps, the NC-Box

cannot be installed immediately

above the heat pump. The hydraulic

connection lines between heat pump

stage 1 and heat pump stage 2 are

installed above the heat pumps.

Preparing for installation

Siting (cont.)

5609 667 GB

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