Thermia Mega Bedienungsanleitung

User Guide

Mega

www.thermia.com

The English language is used for the original instructions.

Other languages are a translation of the original instructions.

(Directive 2006/42/EC)

Table of Contents

1 Foreword ............................................... 4

2Safety precautions ......................................... 5

2.1 Symbols in documents .................................... 5

2.2 Important information .................................... 5

2.3 Installation and maintenance ................................ 6

2.4 System modifications .................................... 7

2.5 Safety valves ......................................... 7

3About your heat pump ....................................... 8

3.1 Product description ..................................... 8

3.2 Water heater ......................................... 8

4Control system ........................................... 9

4.1 Display description ...................................... 9

5Settings and adjustments ..................................... 10

5.1 Activate functions ...................................... 10

5.2 Selecting operating mode .................................. 10

5.3 Adjusting the indoor temperature ............................. 12

5.4 Distribution circuits ..................................... 15

5.5 Operating data ........................................ 16

6 Default settings in the control unit ............................... 17

7 Regular checks ........................................... 18

7.1 Alarms ............................................. 18

7.2 Checking the brine circuit pressure ............................. 19

7.3 Check the water level in the heating circuit ........................ 20

7.4 Checking safety valves .................................... 20

7.5 In the event of leakage .................................... 20

7.6 Cleaning the filters for the heating and brine circuits .................. 21

8 Checklist ............................................... 22

9 Installation carried out by: .................................... 23

User Guide Mega

Thermia Värmepumpar VUJSC202 3

1 Foreword

Buying a heat pump from Thermia is an investment in a better future.

A Thermia heat pump is classed as a renewable energy source, which means that it is considerate of our envi-

ronment. It is a safe and convenient solution that provides heating, hot water and, in certain cases, cooling for

your home at a low cost.

We thank you for the confidence that you have shown in us by buying a heat pump from Thermia . We hope

that you will benefit from it for many, many years to come.

With best wishes

Thermia heat pumps

User Guide Mega

VUJSC202 Thermia Värmepumpar

2 Safety precautions

2.1 Symbols in documents

The instructions contain different warning symbols, which, together with text, indicate to the user that there

are risks involved with actions to be taken.

The symbols are displayed to the left of the text and three different symbols are used to indicate the degree of

danger:

Danger Indicates an immediate danger that leads to

fatal or serious injury if necessary measures

are not taken.

Warning Risk of personal injury!

Indicates a possible danger that can lead to fa-

tal or serious injury if necessary measures are

not taken.

Caution Risk of installation damage.

Indicates a possible hazard that can lead to

item damage if necessary measures are not

taken.

A fourth symbol is used to give practical information or tips on how to perform a procedure.

Information regarding making the handling of

the installation easier or a possible operation-

al technical disadvantage.

2.2 Important information

Warning The front of the heat pump must only be

opened by qualified installers.

User Guide Mega

Thermia Värmepumpar VUJSC202 5

Warning This appliance can be used by children aged 8

years and above, and by persons with reduced

physical, sensory or mental capabilities or lack

of experience or knowledge, provided that

they are supervised or have been instructed in

the safe use of the appliance and understand

the hazards involved.

Cleaning and user maintenance must not be

carried out by children, except under adult su-

pervision.

Warning Children are not permitted to play with the

product.

The system can be considered maintenance-free but certain checks are necessary.

Contact your installer for any service work.

2.3 Installation and maintenance

Warning Only qualified installers may install, operate

and carry out maintenance and repair work on

the heat pump

Warning Only qualified electricians may modify the

electrical installation.

Warning Only qualified refrigeration technicians may

work on the refrigerant circuit

User Guide Mega

VUJSC202 Thermia Värmepumpar

2.4 System modifications

Only qualified installers may carry out modifications on the following components:

▪The heat pump unit

▪The pipes for the refrigerant, brine and water

▪The power supply

▪The safety valves

It is not permitted to carry out construction installations that may affect the operational safety of the heat

pump.

2.5 Safety valves

Warning Never block the connection to the safety

valves' overflow pipes.

The following safety precautions apply to the hot water circuit’s safety valve with corresponding overflow pipe:

▪Water expands when it is heated, which means that a small amount of water is released from the system

via the overflow pipe.

▪The water that exits the overflow pipe can be hot!

Therefore, allow it to flow to a floor drain to prevent any risk of burning yourself.

User Guide Mega

Thermia Värmepumpar VUJSC202 7

3 About your heat pump

3.1 Product description

The Mega heat pump is a heating system for heating and, if an external water heater is installed (accessory), for

hot water production. It has a compressor which is customised for heat pumps.

The Mega heat pump is equipped with control equipment which is presented in a graphic display. The control

equipment is also prepared for monitoring via the internet.

Heating is provided to the building via a water-borne heating system. The heat pump supplies as much of the

heat demand as possible before auxiliary heating is engaged to assist.

The Mega heating unit consists of two basic components:

Heat pump unit

The heat pump consists of:

▪Scroll compressor

▪Stainless steel heat exchanger

▪Circulation pumps for collector system and heating system

Control equipment

The control equipment controls the incoming components of the heating appliance (compressor, circulation

pumps, auxiliary heating and exchange valve) and keeps track of when the pump should start and stop, as well

as whether it should produce heating for the building or hot water.

The control equipment consists of:

▪Colour touch screen and relay module

▪Temperature sensors (outdoor, supply line, return line, brine, hot water and hot gas)

3.2 Water heater

The Mega heat pump can also produce hot water for an external water heater. The temperature of the water

supplied to the water heater is controlled by the start and stop temperature.

User Guide Mega

VUJSC202 Thermia Värmepumpar

4 Control system

The heat pump has an integrated control system which automatically calculates the heat demand in the build-

ing to ensure that the correct amount of heat is produced and emitted when necessary.

A touch screen is connected to the control system.

The display is used for:

▪making settings such as:

▪setting heating

▪adjusting the heat curve

▪displaying operating data such as:

▪operating time

▪current values of sensors

4.1 Display description

Start screen

The screen which appears when the system is switched on.

Here you can also carry out comfort adjustment:

1. Drag clockwise or anticlockwise to raise or lower the offset. Each point represents an increase/decrease of

1°C

2. Alternatively, press + / -

Menu screen

This screen appears when you have pressed on the start screen.

User Guide Mega

Thermia Värmepumpar VUJSC202 9

5 Settings and adjustments

A qualified installer sets the heat pump's basic settings upon installation. The adjustments that may be made

by the installer/user are described below.

Never change control unit settings unless you

are aware of what effects the changes may

have.

Make a note of the default setting.

5.1 Activate functions

Functions must be enabled before they can be

activated and used.

Below is an example where the Heating function is activated.

Other functions are activated in a similar way.

1. Press in the upper left corner of the Start screen.

2. Press .

3. Continue with to the menu page to set heating.

4. Press to activate the heating function.

5. Press to return to the Menu screen.

5.2 Selecting operating mode

The heat pump has a starting time of about 5 -

10 minutes.

The delay does not apply to the auxiliary oper-

ating mode.

Set the heat pump to the desired operating mode in the menu:

1. Press on the Start screen to open the Menu screen.

2. Press . A new window opens.

3. Press the appropriate symbol for the desired operating mode.

User Guide Mega

VUJSC202 Thermia Värmepumpar

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