Vaillant AroTHERM VWL Series Bedienungsanleitung

System assistant

Refrigerant-split heat pump

system

aroTHERM VWL ... AS, uniTOWER VWL ... IS

AT, BE (de), DE

Publisher/manufacturer

Vaillant GmbH

Berghauser Str. 40 D-42859 Remscheid

Tel. +49 21 91 18‑0 Fax +49 21 91 18‑2810

[email protected] www.vaillant.de

UNIDOMO®

www.unidomo.de

04621- 30 60 89 0

[email protected]

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a member of DAIKIN group

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Contents

2System assistant 0020243831_00

Contents

1 Safety .................................................................... 3

1.1 General safety information .................................... 3

2 Notes on the documentation .............................. 4

2.1 Observing other applicable documents ................. 4

2.2 Working with the system assistant ........................ 4

2.3 Key for the symbols ............................................... 4

2.4 Key for the system components ............................ 4

2.5 Refrigerant-split heat pump systems ..................... 5

3 System without system control

(0020253231) ........................................................ 6

3.1 Basic system diagram............................................ 6

3.2 Preparing for installation........................................ 8

3.3 Installing the refrigerant circuit............................... 8

3.4 Installing the heating and domestic hot water

circuit ..................................................................... 9

3.5 Installing the electrical connections ....................... 9

3.6 Completing installation......................................... 10

3.7 Starting up the system......................................... 10

3.8 Implementing settings on the indoor unit's

control .................................................................. 10

4 System with system control (0020232127)...... 12

4.1 Basic system diagram.......................................... 12

4.2 Preparing for installation...................................... 14

4.3 Installing the refrigerant circuit............................. 14

4.4 Installing the heating and domestic hot water

circuit ................................................................... 15

4.5 Installing the electrical connections ..................... 15

4.6 Completing installation......................................... 16

4.7 Starting up the system......................................... 16

4.8 Implementing settings on the indoor unit's

control .................................................................. 16

4.9 Configuring the settings on the system control .... 17

Safety 1

0020243831_00 System assistant 3

1 Safety

1.1 General safety information

1.1.1 Risk of death due to lack of safety

devices

The schematic drawings included in this doc-

ument do not show all safety devices re-

quired for correct installation.

▶Install the necessary safety devices in the

system.

▶Observe the applicable national and inter-

national laws, standards and guidelines.

1.1.2 Complying with the safety

information

▶Observe the safety information in the other

applicable documents.

1.1.3 Using the system assistant

The system assistant does not replace the

instructions that are enclosed with the install-

ation's system components.

▶Carry out a complete and proper installa-

tion and start-up, as described in detail in

the instructions for the components.

1.1.4 Using the basic system diagrams

▶The basic system diagrams are examples

of how to set up systems.

▶Choose the basic system diagram you

want to use to set up your installation.

▶Enter the number of the selected basic

system diagram into the control's Basic

system diagram configuration function

(→Installation instructions for the system

control).

1.1.5 Using the wiring diagrams

Each basic system diagram has an associ-

ated wiring diagram that must be used.

▶Only use the wiring diagram that is appro-

priate for the selected system.

2 Notes on the documentation

4System assistant 0020243831_00

2 Notes on the documentation

2.1 Observing other applicable documents

▶Always follow all the operating and installation instruc-

tions included with the system components.

2.2 Working with the system assistant

The system assistant is used to help with the system installa-

tion and start-up. The important steps are shown, depending

on the selected basic system diagram. All other necessary

instructions and information are described in the instructions

for the system components.

▶Use the references to the instructions.

▶Follow the information, directions and instructions that

are described here.

The settings on the control for the indoor unit and/or the

system control refer to the basic system diagram that was

shown before.

▶Configure the system in accordance with the end user's

requirements.

▶Adjust the system settings to the local conditions.

2.3 Key for the symbols

Symbol Meaning

Cooling

Air heat source

2.4 Key for the system components

Compon-

ent

Meaning

2c outdoor unit refrigerant split

2d indoor unit refrigerant split

3e circulation pump DHW

4buffer cylinder

8a expansion relief valve

8b expansion relief valve drinking water

8c safety assembly drinking water connection

8f expansion vessel drinking water

9a single room temperature control valve (thermo-

static, motorized)

9d bypass valve

12 system control

12k overheat protection thermostat

12m outdoor temperature sensor

12q VR 920 communication unit

Notes on the documentation 2

0020243831_00 System assistant 5

2.5 Refrigerant-split heat pump systems

Basic sys-

tem dia-

gram

Heat generator Heat

source

Heating circuits Additional

functions

System

control

Special equipment

Regu-

lated

Non-reg-

ulated

0020253231 aroTHERM VWL ... AS

uniTOWER VWL ... IS

X−1 X –Buffer cylinder

Outdoor temperature

sensor

0020232127 aroTHERM VWL ... AS

uniTOWER VWL ... IS

X−1 X X As of multiMATIC

VRC 700/5

Buffer cylinder

As of the VR 920 commu-

nication unit

Circulation pump

Outdoor temperature

sensor

3 System without system control (0020253231)

6System assistant 0020243831_00

3 System without system control (0020253231)

3.1 Basic system diagram

System without system control (0020253231) 3

0020243831_00 System assistant 7

Wiring diagram

3 System without system control (0020253231)

8System assistant 0020243831_00

3.2 Preparing for installation

→uniTOWER installation and maintenance instructions, from section 4.1 onwards

→aroTHERM installation and maintenance instructions, from section 4.1 onwards

→Accessory set-up instructions

Work step Selected information/measures

1Building

►Establishing a wall duct

2Installation site for the outdoor unit, indoor

unit

►Defining the installation site

►Comply with the specific conditions for the installation site and the installation

type.

Important planning dimensions:

–Maximum height difference between the outdoor unit and the indoor unit:

10 m

–Basic length of the refrigerant pipes: Minimum 3 m, maximum 25 m

–Minimum clearances and installation clearances:

→aroTHERM installation and maintenance instructions, from section 4.5

onwards

→uniTOWER installation and maintenance instructions, from section 4.5

onwards

3Outdoor unit

Condition: Depending on the installation

type/condition

►Establishing the strip foundations

►Mounting the wall bracket

►Procuring and installing other accessories

►Setting up/installing the product

Validity: VWL 105/5 AS, VWL 125/5 AS outdoor unit

►If required, use the transport belts that are supplied.

Condition: Establishing the strip foundations

►Ensure that the condensate discharge can be positioned in the centre above

the downpipe.

4Outdoor unit

►Installing the condensate discharge pipe

►Ensure that condensate does not reach paths (ice formation).

5Indoor unit

►Setting up the product

Condition: Optional accessory

►Installing the installation set (hydraulics)

►If required, separate the indoor unit into two modules.

►Remove and dispose of the carrying straps after the unit has been set up.

3.3 Installing the refrigerant circuit

→aroTHERM installation and maintenance instructions, from section 5.1 onwards

→uniTOWER installation and maintenance instructions, from section 5.1 onwards

Work step Selected information/measures

6Outdoor unit, indoor unit

►Preparing work on the refrigerant circuit

►Read all of the sections on working on the refrigerant circuit.

►Comply with the specified test pressures, waiting periods and instructions.

Tools and units:→aroTHERM installation and maintenance instructions, from

section 5.1 onwards

7Outdoor unit, indoor unit

►Routing the refrigerant pipes

►Ensure that there is sufficient vibration decoupling.

►Use a bending wrench and flexible springs in order to prevent kinks in the

pipeline.

►Keep the interior of the refrigerant pipes free from air humidity, dirt and

residue.

►Use a pipe cutter to cut the pipe to length.

►Always hold the pipe downwards during lengthening and deburring.

►Do not blow into the pipe (air humidity).

8Outdoor unit, indoor unit

►Connecting the refrigerant pipes

The outdoor unit is pre-filled with R410A refrigerant.

►Keep the isolation valves on the outdoor unit closed.

The indoor unit is filled with nitrogen.

►When unscrewing the flare nut, check whether you can hear the nitrogen

escaping.

9Outdoor unit

►Checking the refrigerant circuit for tightness

►Only carry out the leak-tightness test on the refrigerant pipes using dry nitro-

gen.

–Test pressure: 2.5 MPa (25 bar)

–Waiting period: 10 mins

►Use a leak detection spray to check the connections.

System without system control (0020253231) 3

0020243831_00 System assistant 9

Work step Selected information/measures

10 Outdoor unit

►Evacuating the refrigerant circuit

►Drain the nitrogen that was poured in.

►Connect a vacuum pump.

►Drain the refrigerant circuit in two rounds of 30 minutes each.

►After each round, check whether the pressure is stable:

–0.1 kPa (1.0 mbar) absolute pressure

11 Outdoor unit

►Adding additional refrigerant

Condition: Basic length of the refrigerant pipe > 15 m

►For each additional metre (above 15 m), add additional refrigerant:

–30 g/m for an output of up to 5 kW

–70 g/m for an output of 7 kW or higher

12 Outdoor unit

►Releasing the refrigerant

►Turn the isolation valves as far as they will go.

3.4 Installing the heating and domestic hot water circuit

→uniTOWER installation and maintenance instructions, from section 5.1 onwards

→Accessory set-up instructions

Work step Selected information/measures

13 Indoor unit

►Installing the domestic hot and cold water

connection

►Installing heating circuit connections

►Observe the connection symbols.

→uniTOWER installation and maintenance instructions, section 3.7

14 Heating circuit

►Connecting the buffer cylinder

►Connecting the bypass valve

15 Heating circuit

►Connecting the additional expansion vessel

Condition: The dimension of the installed expansion vessel is not sufficient

16 DHW circuit

►Connecting the expansion vessel

►Ensure that there is sufficient dimensioning.

►If required, adjust the pre-charge pressure.

17 Safety devices

►Installing the safety devices

►Ensure that all of the required safety device have been installed in the sys-

tem.

3.5 Installing the electrical connections

→aroTHERM installation and maintenance instructions, from section 6.1 onwards

→uniTOWER installation and maintenance instructions, from section 6.1 onwards

→multiMATIC installation instructions, from section 4.1 onwards

→Accessory set-up instructions

Work step Selected information/measures

18 Outdoor temperature sensor

►Connecting the outdoor temperature sensor

19 Outdoor unit

►Establishing the power supply

►Select a correct cable cross-section.

►Comply with the connection conditions for the energy supply company.

►Determine whether an electrical connection 1~/230 V or 3~/400 V (→data

plate) is required.

►Determine whether the power supply should be set up using a single-tariff

meter or a dual-tariff meter.

Condition: Depending on the installation site

►Install one or two type-B residual-current circuit breakers for the outdoor unit,

depending on the connection type.

20 Indoor unit

►Establishing the power supply

►Route the cables from the rear into the product and, from there, to the front

through the strain relief.

Condition: Depending on the installation site

►Install a type-A or type-B residual-current circuit breaker for the indoor unit.

21 Indoor unit, electrical house installation

►Installing components for the energy supply

company lockout function

Condition: Power supply via a dual-tariff meter

Option 1: Disconnect the power supply with contactor

Option 2: Actuating the ESC contact

→uniTOWER installation and maintenance instructions, section 6.4

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