Mitsubishi Electric Ecodan EHSC, Ecodan ERSC, Ecodan EHPX Installation Manual

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Page 1

TIL INSTALLATØREN

FÖR INSTALLATÖREN

PARA O INSTALADOR

PER L’INSTALLATORE

PARA EL INSTALADOR

VOOR DE INSTALLATEUR

POUR L’INSTALLATEUR

FÜR INSTALLATEURE

FOR INSTALLER

INSTALLATION MANUAL

For safe and correct use, read this manual and the outdoor unit installation manual thoroughly before installing the hydrobox. English is the original language. The other language versions are translations of the original.

INSTALLATIONSHANDBUCH

Aus Sicherheitsgründen und zur richtigen Verwendung vor der Installation der Hydrobox die vorliegende Bedienungsanleitung und die Installationsanleitung der Außeneinheit gründlich durchlesen. Die Originalsprache ist Englisch. Die anderen Sprachversionen sind vom Original übersetzt.

MANUEL D’INSTALLATION

Pour une utilisation correcte et sûre, lisez soigneusement ce manuel et le manuel d’installation de l’unité extérieure avant d’installer l’ECODAN hydrobox. L’anglais est la langue originale. Les versions fournies dans d’autres langues sont des traductions de l’original.

INSTALLATIEHANDLEIDING

Lees voor een veilig en juist gebruik deze handleiding en de installatiehandleiding van de buiten-unit aandachtig door voordat u met de installatie van de hydrobox begint. Engels is de oorspronkelijke taal. De andere taalversies zijn vertalingen van het origineel.

MANUAL DE INSTALACIÓN

Para un uso correcto y seguro, lea detalladamente este manual y el manual de instalación de la unidad exterior antes de instalar la Hydrobox. El idioma original del documento es el inglés. Las versiones en los demás idiomas son traducciones del original.

MANUALE DI INSTALLAZIONE

Per un utilizzo sicuro e corretto, prima di installare l’Hydrobox leggere attentamente questo manuale e quello di installazione dell’unità esterna. Il testo originale è redatto in lingua inglese. Le altre versioni linguistiche rappresentano traduzioni dell’originale.

MANUAL DE INSTALAÇÃO

Para uma utilização segura e correcta, leia este manual e o manual de instalação da unidade interior antes de instalar o permutador de calor. O idioma original é o inglês. As versões em outros idiomas são traduções do idioma original.

INSTALLATIONSMANUAL

Af hensyn til sikker og korrekt brug skal denne vejledning og vejledningen til udendørsenheden læses omhyggeligt, inden hydroboxenheden installeres. Engelsk er det oprindelige sprog. De andre sprogversioner er oversættelser af originalen.

INSTALLATIONSMANUAL

För säker och korrekt användning, läs denna manual och utomhusenhetens installationsmanual innan du installerar hydroboxen. Engelska är originalspråket. De övriga språkversionerna är översättningar av originalet.

INSTALLERINGSHÅNDBOK

For å sikre en trygg og riktig bruk skal du lese denne håndboken og installeringshåndboken for utendørsenheten grundig før du monterer hydroboksen. Engelsk er originalspråket. De andre språkversjonene er oversettelser av originalen.

ASENNUSOPAS

Lue turvallista ja asianmukaista käyttöä varten tämä opas ja ulkoyksikön asennusopas huolellisesti ennen hydroboxin asentamista. Alkuperäiskieli on englanti. Muut kieliversiot ovat alkuperäisen käännöksiä.

ASENTAJALLE

FOR MONTØREN

Hydrobox EHSC series EHPX series ERSC series

Español (E)

Italiano (I)

Português (P)

Dansk (DE)

Svenska (SW)

Norsk (NO)

Suomi (FI)

English (GB)

Deutsch (D)

Français (F)

Nederlands (NL)

Page 2

Contents

1. Safety Notices .................................................................. 2

2. Introduction ...................................................................... 4

Overview of the System ............................................... 4

How the Heat Pump Works .......................................... 4

Overview of the Controls ............................................. 5

3. Technical Information ...................................................... 6

Product specication ................................................... 6

Component Parts .......................................................... 7

Technical Drawings .....................................................11

Unit Compatibility ....................................................... 13

Water circuit diagram ................................................. 13

Local system ............................................................... 14

4. Installation ..................................................................... 15

4.1 Location ...................................................................... 15

Transportation and Handling ..................................... 15

Suitable Location ........................................................ 15

Service access diagrams ........................................... 15

Room Thermostat ....................................................... 15

Repositioning hydrobox............................................. 15

Mounting procedure ................................................... 16

4.2 Water Quality and System Preparation ................... 18

General ........................................................................ 18

Anti-Freeze .................................................................. 18

New Installation (primary water circuit) .................... 18

Existing Installation (primary water circuit) ............. 18

Minimum amount of water required in the space heating circuit

How to access Internal Components and Control and Electrical Box

.... 18

4.3 Water Pipe Work ........................................................ 19

Hot Water Pipework .................................................... 19

Hydraulic lter work (ONLY EHPT series) ................ 19

Pipework Connections ............................................... 19

Insulation of Pipework................................................ 19

Discharge Pipework ................................................... 19

Filling the System (Primary Circuit) .......................... 19

Sizing Expansion Vessels .......................................... 20

Water Circulation Pump Characteristics .................. 20

Safety device connections ......................................... 21

Piping diagram of 2-zone temperature control ........ 21

4.4 Refrigerant Pipework (Split Model Systems only) .. 22

Precautions ................................................................. 22

Connecting pipes (Figure 4.4.1) ................................ 22

4.5 Electrical Connection ................................................ 23

5. System Set UP ................................................................ 28

5.1 Dip Switch Functions ................................................. 28

5.2 Connecting inputs/outputs ....................................... 29

Signal inputs ............................................................... 29

Thermistor inputs ....................................................... 29

Outputs ........................................................................ 30

5.3 Wiring for 2-zone temperature control .................... 30

5.4 Installation procedure for DHW tank ........................ 31

5.5 Remote Controller Options ....................................... 33

1-zone temperature control........................................ 33

2-zone temperature control........................................ 34

Remote Installation of Main Controller ..................... 35

5.6 Using SD memory card.............................................. 36

5.7 Main Controller ........................................................... 37

Setting the Main Controller ........................................ 40

Main Settings Menu .................................................... 40

Initial Settings ............................................................ 40

Domestic Hot Water (DHW)/Legionella Prevention . 41

Heating/Cooling .......................................................... 43

Holiday mode .............................................................. 44

Schedule timer ............................................................ 44

Service Menu ............................................................... 46

6. Commissioning .............................................................. 53

Pre-commissioning Checklist ................................... 53

7. Service and Maintenance .............................................. 54

Basic Troubleshooting for Hydrobox........................ 54

Annual Maintenance ................................................... 58

Error Codes ................................................................. 59

Engineers Forms......................................................... 60

Annual Maintenance Log Book ................................. 60

8. Supplementary information .......................................... 63

Refrigerant collecting (pumpdown) for split model systems only

.... 63

Back-up operation of boiler ....................................... 63

Multiple outdoor units control ................................... 63

Abbreviations and glossary

No. Abbreviations/Word Description

1 Compensation curve mode Space heating incorporating outdoor ambient temperature compensation 2 COP Coefcient of Performance the efciency of the heat pump 3 Cooling mode Space cooling through fan-coils or underoor cooling (Refer to Item no. 20 in this list.) 4 DHW mode Domestic hot water heating mode for showers, sinks, etc 5 Flow rate Speed at which water circulates around the primary circuit 6 Flow temperature Temperature at which water is delivered to the primary circuit 7 Freeze stat. function Heating control routine to prevent water pipes freezing 8 FTC4 Flow temperature controller, the circuit board in charge of controlling the system

9 Heating mode Space heating through radiators or Underoor heating (Refer to Item no. 21 in this list.) 10 Hydrobox Indoor unit housing the component plumbing parts (NO DHW tank) 11 Legionella Bacteria potentially found in plumbing, showers and water tanks that may cause Legionnaires disease 12

LP mode Legionella prevention mode – a function on systems with water tanks to prevent the growth of legionella bacterium

Packaged model Plate heat exchanger in the outdoor heat pump unit

PRV Pressure relief valve

Refrigerant A compound used within the heat pump cycle that goes through a phase change from gas to liquid

Return temperature Temperature at which water is delivered from the primary circuit

Split model Plate heat exchanger in the indoor unit

TRV Thermostatic radiator valve – a valve on the entrance or exit of the radiator panel to control the heat output

Underoor cooling A system of water carrying pipes under the oor, that cools the oor surface to cool the room/space.

20 Underoor heating A system of water carrying pipes under the oor, that warms the oor surface to heat the room/space.

Accessories (included)

Back plate Screw M5×8 SD memory card

1 2 1

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Safety Notices

Please read the following safety precautions carefully.

WARNING:

Precautions that must be observed to prevent injuries or death.

CAUTION:

Precautions that must be observed to prevent damage to unit.

This installation manual along with the user manual should be left with the product after installation for future reference.

Mitsubishi Electric is not responsible for the failure of locally-supplied and eld-supplied parts.

Be sure to perform periodical maintenance. Be sure to follow your local regulations. Be sure to follow the instructions provided in this manual.

•

WARNING

Mechanical

The hydrobox and outdoor units must not be installed, disassembled, relocated, altered or repaired by the user. Ask an authorised installer or technician. If the unit is

installed improperly or modied after installation by the user water leakage, electric shock or re may result. The outdoor unit should be securely xed to a hard level surface capable of bearing its weight. The hydrobox should be positioned on a hard vertical surface capable of supporting its lled weight to prevent excessive sound or vibration.

Do not position furniture or electrical appliances below the outdoor unit or hydrobox. The discharge pipework from the emergency/safety devices of the hydrobox should be installed according to local law.

Only use accessories and replacement parts authorised by Mitsubishi Electric ask a qualied technician to t the parts.

Electrical

All electrical work should be performed by a qualied technician according to local regulations and the instructions given in this manual.

The units must be powered by a dedicated power supply and the correct voltage and circuit breakers must be used. Wiring should be in accordance with national wiring regulations. Connections must be made securely and without tension on the terminals. Earth unit correctly.

General

Keep children and pets away from both the hydrobox and outdoor units. Do not use the hot water produced by the heat pump directly for drinking or cooking. This could cause illness to the user. Do not stand on the units. Do not touch switches with wet hands.

Annual maintenance checks on both the hydrobox and the outdoor unit should be done by qualied person. Do not place contains with liquids in on top of the hydrobox. If they leak or spill onto the hydrobox damage to the unit and/or re could occur.

Do not place any heavy items on top of the hydrobox. When installing or relocating, or servicing the hydrobox, use only the specied refrigerant (R410A) to charge the refrigerant lines. Do not mix it with any other refriger-

ant and do not allow air to remain in the lines. If air is mixed with the refrigerant, then it can be the cause of abnormal high pressure in the refrigerant line, and may result in an explosion and other hazards.

The use of any refrigerant other than that specied for the system will cause mechanical failure or system malfunction or unit breakdown. In the worst case, this could

lead to a serious impediment to securing product safety.

In heating mode, to avoid the heat emitters being damaged by excessively hot water, set the target ow temperature to a minimum of 2ºC below the maximum allowable temperature of all the heat emitters. For Zone2, set the target ow temperature to a minimum of 5ºC below the maximum allowable ow temperature of all the

heat emitters in Zone2 circuit.

CAUTION

Use clean water that meets local quality standards on the primary circuit.

The outdoor unit should be installed in an area with sufcient airow according to the diagrams in the outdoor unit installation manual.

The hydrobox should be located inside to minimise heat loss. Water pipe-runs on the primary circuit between outdoor and indoor unit should be kept to a minimum to reduce heat loss. Ensure condensate from outdoor unit is piped away from the base to avoid puddles of water.

Remove as much air as possible from water circuit. Refrigerant leakage may cause suffocation. Provide ventilation in accordance with EN378-1.

Be sure to wrap insulation around the piping. Direct contact with the bare piping may result in burns or frostbite. Never put batteries in your mouth for any reason to avoid accidental ingestion. Battery ingestion may cause choking and/or poisoning. Install the unit on a rigid structure to prevent excessive sound or vibration during operation.

If power to the hydrobox is to be turned off (or system switched off) for a long time, the water should be drained.

Preventative measures should be taken against water hammer, such as installing a Water Hammer Arrestor on the primary water circuit, as directed by the manufacturer.

In order to prevent condensation on emitters, adjust ow temperature appropriately and also set the lower limit of the ow temperature on site.

Safety Notices

1. Safety Notices

Page 4

Safety Notices

CAUTION (SPLIT MODELS ONLY)

<Using R410A refrigerant heat pumps> Use C1220 copper phosphorus, for copper and copper alloy seamless pipes, to connect the refrigerant pipes. Make sure the insides of the pipes are clean and do not

contain any harmful contaminants such as sulfuric compounds, oxidants, debris, or dust. Use pipes with the specied thickness. (Refer to 4.4.) Note the following if reusing existing pipes that carried R22 refrigerant.

- Replace the existing are nuts and are the ared sections again.

- Do not use thin pipes. (Refer to 4.4.)

Store the pipes to be used during installation indoors and keep both ends of the pipes sealed until just before brazing. (Leave elbow joints, etc. in their packaging.) If

dust, debris, or moisture enters the refrigerant lines, oil deterioration or compressor breakdown may result.

Use ester oil, ether oil, alkylbenzene oil (small amount) as the refrigeration oil applied to the ared sections. If mineral oil is mixed in the refrigeration oil, oil deterioration

may result.

Do not use refrigerant other than R410A refrigerant. If another refrigerant is used, the chlorine will cause the oil to deteriorate. Use the following tools specically designed for use with R410A refrigerant. The following tools are necessary to use R410A refrigerant. Contact your nearest dealer for

any questions.

Tools (for R410A)

Gauge manifold Flare tool

Charge hose Size adjustment gauge

Gas leak detector Vacuum pump adapter

Torque wrench Electronic refrigerant charging scale

Be sure to use the correct tools. If dust, debris, or moisture enters the refrigerant lines, refrigeration oil deterioration may result.

Do not use a charging cylinder, a cylindrical measuring container, when charging R410A refrigerant gas. If the refrigerant gas is transferred to a charging cylinder, the composition of the refrigerant will change and system efciency will be reduced.

WARNING (SPLIT MODELS ONLY)

Do not discharge refrigerant into the atmosphere if refrigerant leaks during installation, ventilate the room. Use appropriate tools for high pressure refrigerant. When pumping down refrigerant , stop the compressor before disconnecting the refrigerant pipes. During installation securely fasten the refrigerant pipes before starting the compressor. Check that refrigerant gas does not leak after the completion of installation.

Use R410A refrigerant only. Do not allow air to enter the lines. Failure to observe these instructions will cause mechanical failure, system failure or, in the worst case,

serious breach of product safety.

Page 5

DHW tank

2 kW

3 kW

1 kW

4. Evaporator

(Outdoor unit air heat exchanger)

The purpose of this installation manual is to instruct competent persons how to safely and efficiently install and commission the hydrobox system. The target readers of this manual are competent plumbers and/or refrigeration engineers

who have attended and passed the requisite Mitsubishi Electric product training

and have appropriate qualications for installation of an unvented hot water hydrobox specic to their country.

Overview of the System

The Mitsubishi Electric Air to Water (ATW) for heat pump system with hydrobox

consists of the following components; outdoor heat pump unit and indoor hydrobox incorporating the main controller.

How the Heat Pump Works

Space heating and DHW

Heat pumps take electric energy and low grade heat energy from the outdoor air to heat refrigerant which in turn heats water for domestic use and space heating.

The efciency of a heat pump is known as the Coefcient of Performance or COP

this is the ratio of heat delivered to power consumed. The heat pump operates

most efciently when generating low ow temperatures.

The operation of a heat pump is similar to a refrigerator in reverse. This process is known as the vapour-compression cycle and the following is a more detailed explanation.

The rst phase begins with the refrigerant being cold and low pressure.

1. The refrigerant within the circuit is compressed as it passes through the com

pressor. It becomes a hot highly pressurised gas. The temperature also rises

typically to 60°C.

2. The hot refrigerant gas is then condensed as it passes across one side of a plate heat exchanger. Heat from the refrigerant gas is transferred to the cooler

side (water side) of the heat exchanger. As the temperature of the refrigerant

decreases its state changes from a gas to a liquid.

3. Now as a cold liquid it still has a high pressure. To reduce the pressure the liq

uid passes through an expansion valve. The pressure drops but the refrigerant remains a cold liquid.

4. The nal stage of the cycle is when the refrigerant passes into the evaporator

and evaporates. It is at this point when some of the free heat energy in the outside air is absorbed by the refrigerant.

It is only the refrigerant that passes through this cycle; the water is heated as it travels through the plate heat exchanger. The heat energy from the refrigerant passes through the plate heat exchanger to the cooler water which increases in temperature. This heated water enters the primary circuit and is circulated and

used to serve the space heating system and DHW tank (if present in system).

Low temperature renewable heat energy taken from the environment

Electrical energy input

Heat energy output

2. Condenser

(Plate heat exchanger)

1. Compressor

3. Expansion valve

Introduction

2. Introduction

Page 6

20°C

Introduction

Overview of the Controls

Built into the front of the indoor unit is the Flow Temperature Controller 4 (FTC4).

This device controls the function of both the outdoor heat pump unit and the indoor unit. The advanced technology means that by using an FTC4 controlled heat pump you can not only make savings compared to traditional fossil fuel type heating systems but also compared to many other heat pumps on the market.

As explained in the earlier section, ‘How the Heat Pump Works,’ heat pumps are most efcient when providing low ow temperature water. The FTC4’s sophisticated technology enables the room temperature to be kept at the desired level

whilst utilising the lowest possible ow temperature from the heat pump.

The controller uses temperature sensors around the heating system to monitor

the air and ow temperatures. This data is regularly updated and compared to

previous data by the controller to predict changes in room temperature and adjust the heat pump output accordingly. By monitoring not only the outdoor ambient, but the room and water circuit temperatures, the heating is more consistent and sudden spikes in required heating are reduced. This results in a lower overall

ow temperature being required.

Temperature data is regularly received by the FTC4 from temperature sensors around the heating system. The most recent data is used with the previous temperature readings to predict the ow temperature required to keep the room temperature constant. The room temperature sensor can either be wired or the Mitsubishi Electric wireless remote controller can be used as it incorporates a temperature sensor. For

more information on room temperature sensor options see section ‘Remote Controller Options’. (Page 33)

Room temp sensor

Return temp sensor

Flow temp sensor

Ambient temp sensor

FTC4

Page 7

Technical Information

Product specication

Model name EHSC-VM6B EHSC-YM9B EHSC-VM6EB EHSC-YM9EB EHPX-VM2B EHPX-VM6B EHPX-YM9B ERSC-VM2B

Overall unit dimensions (Height×Width×Depth) 800×530×360 mm 860×530×360 mm

Weight (empty) 53 kg 53 kg 49 kg 49 kg 39 kg 41 kg 41 kg 54 kg

Weight (full) 59 kg 59 kg 55 kg 55 kg 44 kg 46 kg 46 kg 60 kg

Plate heat exchanger — — —

Cooling mode NOT available Available

Unvented expansion vessel

(Primary circuit)

Nominal volume 10 L - 10 L

Charge pressure 0.1 MPa (1 bar) - 0.1 MPa (1 bar)

Safety

device

Water circuit

(Primary)

Control thermistor 1 - 80°C

Pressure relief valve 0.3 MPa (3 bar)

Flow switch Min ow 5.5 L/min

Booster heater

Manual reset thermostat 90°C

Thermal cut-out (for dry run prevention) 121°C

Primary circuit circulating pump Grundfos UPM2 25 70-180

Connections

Water 28 mm compression (Primary circuit) G1 (Male)

Refrigerant

(R410A)

Liquid 9.52 mm — 9.52 mm

Gas 15.88 mm — 15.88 mm

Target temperature range

Flow temperature

Heating 25 - 60°C

Cooling — 5 - 25°C

Room temperature

Heating 10 - 30°C

Cooling — Not available

Guaranteed operating

range

Ambient *1 0 - 35°C (≤ 80%RH)

Outdoor temperature

Heating See outdoor unit spec table.

Cooling —

See outdoor unit

spec table (min.

10 °C). *2

Electrical data

Control board

Power supply

(Phase, voltage,

frequency)

~/N, 230V, 50Hz

Breaker

(*when powered from

independent source)

10A

Booster heater

Power supply

(Phase, voltage,

frequency)

~N, 230V, 50Hz 3~, 400V, 50Hz ~N, 230V, 50Hz 3~, 400V, 50Hz ~N, 230V, 50Hz ~N, 230V, 50Hz 3~, 400V, 50Hz ~N, 230V, 50Hz

Capacity 2kW + 4kW 3kW + 6kW 2kW + 4kW 3kW + 6kW 2kW 2kW + 4kW 3kW + 6kW 2kW

Current 26A 13A 26A 13A 9A 26A 13A 9A

Breaker 32A 16A 32A 16A 16A 32A 16A 16A

Optional extras

• Wireless Remote Controller PAR-WT50R-E • Joint pipe (15.88 → 12.7) PAC-SH50RJ-E

• Wireless Receiver PAR-WR51R-E • Joint pipe (9.52 → 6.35) PAC-SH30RJ-E

• Remote sensor PAC-SE51TS-E • Thermistor PAC-TH011-E

• Tank thermistor (THW5) PAC-TH011TK-E • High temperature thermistor PAC-TH011HT-E

*1 The environment must be frost-free.

*2 Low ambient cooling is NOT allowed.

Page 8

Technical Information

Component Parts

Number Component

1 Control and electrical box

2 Main controller

3 Manometer

4 Expansion vessel

5 Expansion vessel charge valve

6 Automatic air vent

7 Booster heater

8 Drain cock

9 Water circulation pump

10 Pressure relief valve

11 Flow switch

Plate heat exchanger

Strainer valve

Inlet from space heating/Indirect DHW tank (primary return)

Outlet to space heating/Indirect DHW tank

(primary ow)

C Refrigerant (Liquid)

D Refrigerant (Gas)

Discharge from pressure relief valve (installer to pipe connect to suitable drain point)

<EHSC-*M*B> (Split model system)

A B C D

Page 9

Number Component

1 Control and electrical box

2 Main controller

3 Manometer

6 Automatic air vent

7 Booster heater

8 Drain cock

9 Water circulation pump

10 Pressure relief valve

11 Flow switch

Plate heat exchanger

Strainer valve

Inlet from space heating/Indirect DHW tank (primary return)

Outlet to space heating/Indirect DHW tank

(primary ow)

C Refrigerant (Liquid)

D Refrigerant (Gas)

Discharge from pressure relief valve (installer to pipe connect to suitable drain point)

Technical Information

<EHSC-*M*EB> (Split model system without expansion vessel)

*For installation of this model, make sure to install a primary-side expansion vessel in the eld. (See Figure 4.3.1.)

A B C D

Page 10

Technical Information

Number Component

1 Control and electrical box

2 Main controller

3 Manometer

4 Expansion vessel

5 Expansion vessel charge valve

Automatic air vent

7 Booster heater

8 Drain cock

9 Water circulation pump

10 Pressure relief valve

11 Flow switch

Strainer valve

Inlet from space heating/Indirect DHW tank (primary return)

B Inlet from heat pump

C Outlet to heat pump

Outlet to space heating/Indirect DHW tank (primary ow)

Discharge from pressure relief valve (installer to pipe connect to suitable drain point)

<EHPX> (Packaged model system)

3.8

A B C D

Page 11

Technical Information

Number Component

1 Control and electrical box

2 Main controller

3 Manometer

4 Expansion vessel

5 Expansion vessel charge valve

6 Automatic air vent

7 Booster heater

8 Drain cock

9 Water circulation pump

10 Pressure relief valve

11 Flow switch

Plate heat exchanger

Strainer valve

Drain pan

Inlet from space heating/Indirect DHW tank (primary return)

Outlet to space heating/Indirect DHW tank

(primary ow)

C Refrigerant (Liquid)

D Refrigerant (Gas)

Discharge from pressure relief valve (installer to pipe connect to suitable drain point)

<ERSC> (Split model system for heating and cooling)

A B C D

Page 12

357

348

233

461

381

326

227

163

124

282

253

189

137

55.5

（233)

100.5

110.5

800

264.5

590

530

357

348

233

282

253

189

137

461

227

163

157

124

55.5

（233)

800

264.5

577

110.5

530

Technical Information

Technical Drawings

<EHSC> (Split model system)

<Front>

Letter Pipe description Connection size/type

Spac e heati ng/ Indirect DHW

tank (primary) return connection

28 mm/Compression

B Flow connection from heat pump 28 mm/Compression

C Return connection to heat pump 28 mm/Compression

Spac e heati ng/ Indirect DHW

tank (primary) ow connection

28 mm/Compression

Discharge pipe (by installer)

from pressure relief valve

G1/2” female (valve port within hydrobox casing)

Electrical cable inlets

— For inlets and , run low-voltage wires including external input wires and thermistor wires. For inlets and , run high-voltage wires including power cable, indoor-outdoor cable, and external output wires.

*For a wireless receiver (option) cable, use inlet .

<EHPX> (Packaged model system)

<Front>

Earth leakage circuit breaker

Terminal block

Main controller

Pressure relief valve

Earth leakage circuit breaker

Terminal block

Main controller

Pressure relief valve

Automatic air vent

Letter Pipe description Connection size/type

Space heating/Indirect DHW

tank (primary) return connection

28 mm/Compression

Space heating/Indirect DHW

tank (primary) ow connection

28 mm/Compression

C Refrigerant (Liquid) 9.52 mm/Flare

D Refrigerant (Gas) 15.88 mm/Flare

Discharge pipe (by installer) from

pressure relief valve

G1/2” female (valve port within hydrobox casing)

Electrical cable inlets

*For a wireless receiver (option) cable, use inlet .

Page 13

(233)

110

357

348

233

133

223

308

365

461

124

530

324.5

100.5

860

637

Technical Information

Letter Pipe description Connection size/type

Space heating and cooling/

Indirect DHW tank (primary)

return connection

G1 nut

Space heating and cooling/

Indirect DHW tank (primary) ow

connection

G1 nut

C Refrigerant (Liquid) 9.52 mm/Flare

D Refrigerant (Gas) 15.88 mm/Flare

Discharge pipe (by installer) from

pressure relief valve

G1/2” female (valve port within hydrobox casing)

Electrical cable inlets

G Drain socket

O.D. ø20

<ERSC> (Split model system)

<Front>

<Rear>

Earth leakage circuit breaker

Terminal block

Main controller

Pressure relief valve

Automatic air vent

Page 14

Technical Information

Unit Compatibility

Hydrobox

Outdoor unit

EHSC-VM6B EHSC-YM9B EHSC-VM6EB EHSC-YM9EB EHPX-VM2B EHPX-VM6B EHSC-YM9B ERSC-VM2B

Packaged-type

PUHZ-W50-85 PUHZ-HW112-140

Split-type PUHZ-RP35-140

PUHZ-HRP71-125 PUHZ-SW40-120 PUHZ-SHW80-140 PUHZ-FRP

Note

• Be sure to follow your local regulations to per

form system conguration of the DHW connections.

• DHW connections are not included in the hy

drobox package. All required parts are to be sourced locally.

• To enable draining of the hydrobox an isolating valve should be positioned on both the inlet and outlet pipework.

• Be sure to install a strainer, on the inlet pipe work to the hydrobox.

• Suitable drain pipework should be attached to all relief valves in accordance with your country's regulations.

• A backow prevention device must be installed on water supply pipework (IEC 61770).

• When using components made from different metals or connecting pipes made of different metals insulate the joints to prevent a corrosive reaction taking place which will damage the pipework.

Water circuit diagram

<EHSC> (Split model system) <ERSC> (Split model system for heating and cooling)

Hydrobox

Drain

Local system *1

Water supply

Drain

Cold water

DHW

Flare connections

A. Refrigerant pipe B. Water pipe

Plate heat exchanger

2. Flexible hose

3. Booster heater 1,2

4. Drain cock (booster heater)

5. Pump valve

6. Water circulation pump 1

7. Manometer

8. Pressure relief valve

9. Automatic air vent

10. Expansion vessel (except EHSC-*M*EB)

11.

Strainer valve

12.

Flow switch

13. THW1

14.

THW2

15.

TH2

16.

THW5 (optional part PAC-TH011TK-E)

17.

Outdoor unit

18.

Drain pipe (eld supply)

19.

3-way valve (eld supply)

20. DHW indirect unvented tank (eld supply)

21.

Cold water inlet pipe (eld supply)

22. DHW outlet connection (eld supply)

23. Back ow prevention device (eld supply)

24. Isolating valve (eld supply)

25. Magnetic lter is recommended (eld supply).

26. Strainer (eld supply)

*1 Refer to page 14.

Hydrobox

Cold water

DHW

Local system *1

Water supply

Drain

<EHPX> (Packaged model system)

*1 Not available for connection to PUHZ-FRP

Page 15

Technical Information

1-zone temperature control

2-zone temperature control

8910

1-zone temperature control with boiler 2-zone temperature control with boiler

1. Zone1heatemitters(e.g.radiator,fancoilunit)(eldsupply)

2. Mixingtank(eldsupply)

3. Zone1owwatertemp.thermistor(THW6)(option)

4. Zone1returnwatertemp.thermistor(THW7)(option)

5. Zone1watercirculationpump(eldsupply)

6. Zone1owswitch(eldsupply)

7. Motorizedmixingvalve(eldsupply)

8. Zone2owwatertemp.thermistor(THW8)(option)

9. Zone2returnwatertemp.thermistor(THW9)(option)

10. Zone2watercirculationpump(eldsupply)

11. Zone2owswitch(eldsupply)

12. Zone2heatemitters(e.g.underoorheating)(eldsupply)

13. Boilerowwatertemp.thermistor(THWB1)(option)

14. Boilerreturnwatertemp.thermistor(THWB2)(option)

15. Boiler

Local system

564

Zone1

Zone2

Zone1

Zone2

Note: Cooling mode cannot run under 2-zone temperature control but can run both in Zone1 and Zone2 under 1-zone temperature control.

Page 16

4.1 Location Transportation and Handling

Hydrobox is delivered on a wooden pallet base with cardboard protection.

Service access

Care should be taken when transporting the hydrobox so that the casing is not damaged by impact. Do not remove the protective packaging until hydrobox has

reached its nal location. This will help protect the structure and control panel.

Note:

• The hydrobox should ALWAYS be moved by a minimum of 2 people.

• Do NOT hold piping when moving the hydrobox.

Suitable Location

Before installation the hydrobox should be stored in a frost-free weatherproof location. Units must NOT be stacked.

• The hydrobox should be installed indoors in a frost free weather proof location.

• The hydrobox should be positioned on a level wall capable of supporting it’s

lled weight.

• To nd out the weight, refer to “3. Technical Information”.

• Care should be taken that minimum distances around and in front of the unit for

service access are observed <Figure 4.1.3>.

• Secure the hydrobox to prevent it being knocked over accidentally or during

earthquakes.

• The hook and panel supports should be used to x the hydrobox to the wall.

<Fig. 4.1.2>

• Install the hydrobox where it is not exposed to water/excessive moisture.

Service access diagrams

Service access

Parameter Dimension (mm)

a 200 b 150 c 500 d 500

Sufcient space MUST be left for the provision of discharge pipework as detailed

in National and Local building regulations.

The hydrobox must be located indoors and in a frost-free environment, for example in a utility room.

Room Thermostat

If tting a new room thermostat for this system;

• Position it out of direct sunlight and draughts

• Position it away from internal heat sources

• Position it in a room without a TRV on the radiator/heat emittor

• Position it on an internal wall Note: Do not position the thermostat excessively close to the wall. The thermostat

may detect the temperature of the wall, which could affect appropriate control of the room temperature.

• Position it approx. 1.5 m above oor level

Repositioning hydrobox

If you need to move the hydrobox to a new position FULLY DRAIN it before moving to avoid damage to the unit.

Note: Do NOT hold piping when moving the hydrobox.

Hook

Panel support

● Prepare the proper tools.

● Prepare the proper protection.

● Allow parts to cool before attempting any maintenance.

● Provide adequate ventilation.

● After stopping the operation of the system, turn off the power-supply breaker and remove the power plug.

● Discharge the capacitor before commencing work involving the electric parts.

● Do not perform work involving electric parts with wet hands.

● Do not pour water or liquid into the electric parts.

● Do not touch the refrigerant.

● Do not touch the hot or cold surfaces in the refrigerant cycle.

● When the repair or the inspection of the circuit needs to be done without turning off the power, exercise great caution not to touch any live parts.

Installation

4. Installation

Page 17

530

123

116

677 (EHSC, EHPX models)

737 (ERSC models)

Installation

Back plate

Wall

Screw mounting holes

Notch

Mounting procedure

1. Install the included back plate accessory.

* When installing the back plate, use eld-supplied screws and compatible xing plugs.

● Figure 4.1.6 shows the relative positions between the unit and the wall secured

back plate.

Referring to the <Figure 4.1.3> Service access, install the back plate.

● Ensure that the notch is positioned at the TOP of the back plate.

The back plate is provided with screw mounting holes that are round or oval. To prevent the unit from falling off the wall, choose the appropriate number of holes or hole positions and horizontall y secure the back plate to the appropriate wall location.

Back plate

Unit

Hook

(on the back of casing)

Back plate

Hook

Unit

Back plate

2. Insert the hook on the back of the hydrobox behind the notch of the back plate.

*The lifting up of the hydrobox is facilitated by rst tilting the unit forward using the included packaging cushioning.

Note: Hold the MAIN BODY of the hydrobox when carrying or mounting the hydrobox to a wall.

Holding and supporting the unit by the manometer, water pipe, or refrigerant pipe may result in breakdown of the components and impact on unit’s conditions of warranty.

Packaging cushion

Unit

Wooden packaging base

Tilting the unit.

Wall

Plugs

Back plate (horizontal)

Screws

Screwdriver

Centre line

Removing the wooden

packaging base.

Page 18

Installation

Unit

Control and electrical box

Unit

Control and electrical box

Fix the unit using the 2 screws.

) The back plate and the unit share the same width.

When mounting the unit, the centre lines of the back plate and the unit can be aligned by keeping the right and left edges of the back plate within the width of the unit.

The hook on the unit can then be attached to the notch on the back plate. (When mounting, the casing’s lower panel support should be in contact with the wall surface.)

) Check and ensure that the mark is positioned and properly engaged at the bent section level on the back plate as shown.

Unit

Hook

To assist in xing the unit’s hook on to the notch on the back plate, rst line up the centre lines.

Centre line

Side edges of the back plate

Back plate

* Keep the edges of the back plate within

the width of the unit.

3. Referring to "How to access Internal Components and Control and Electrical Box", x the unit and the back plate using the included 2 screws (accessory items).

Caution) BEFORE performing eld piping, be sure to t and tighten these two screws.

Otherwise, the hook could be disengaged, and the unit could fall down.

Screw M5×8

Mount the unit.

Unit

mark

Hook

Back plate

Bent section of back plate

) Each of the right and left side panels has a mark indication.

Lift up the unit so that the marks are positioned above the top edge of the back plate as shown below.

Lift up the unit so that the marks are positioned above the top edge of the back plate.

Lift up the unit.

Unit

mark

Wall

Hook

Back plate

(wall mounted)

Top edge of back plate

Wall

Page 19

4.2.1

Installation

How to access Internal Components and Control and Electrical Box

<A> Opening the front panel

1. Remove the two lower screws.

2. Slide front panel upwards slightly and open carefully.

3. Disconnect the relay connector connecting main controller cable and the control board cable.

<B> Opening the control and electrical box cover

1. Remove the 4 screws.

2. Slide the control and electrical box cover upwards slightly and remove facing panel.

<C> Accessing the back of the control and electrical box The control and electrical box has a holding screw on the right and is hinged on the left hand side.

1. Remove the holding screw on the control and electrical box.

2. The control and electrical box can then be swung forward on the left hand hinges.

Note:

1. Before accessing back of control and electrical box release cables from the

tie straps attached to the cross-support.

2. After servicing, re-secure all cables using straps provided. Reconnect

main controller cable to its relay connector. Replace front panel and resecure screws at base.

Screws

Screws

Hinges

Open

4.2 Water Quality and System Preparation

General

• Water quality should be to European Directive 98/83 EC standards.

► pH value of 6.5-8.0 (Recommended: pH6.5 - 7.5) ► Calcium ≤ 100 mg/l ► Chlorine ≤ 100 mg/l ► Iron/Manganese ≤ 0.5 mg/l

• In known hard water areas, to prevent/minimise scaling, it is benecial to restrict

the routine stored water temperature (DHW max. temp.) to 55°C.

Anti-Freeze

Anti-freeze solutions MUST use propylene glycol with a toxicity rating of Class 1 as

listed in Clinical Toxicology of Commercial Products, 5th Edition.

Note: Ethylene glycol is toxic and must NOT be used in the primary water

circuit in case of any cross-contamination of the potable circuit.

New Installation (primary water circuit)

• Before connecting outdoor unit, thoroughly cleanse pipework of building debris,

solder etc using a suitable chemical cleansing agent.

• Flush the system to remove chemical cleanser.

• For all packaged model systems add a combined inhibitor and anti-freeze

solution to prevent damage to the pipework and system components.

• For split model systems the responsible installer should decide if anti-freeze

solution is necessary for each site’s conditions. Corrosion inhibitor however should always be used.

Existing Installation (primary water circuit)

• Before connecting outdoor unit the existing heating circuit MUST be chemically

cleansed to remove existing debris from the heating circuit.

• Flush the system to remove chemical cleanser.

• For all packaged model systems add a combined inhibitor and anti-freeze

solution to prevent damage to the pipework and system components.

• For split model systems the responsible installer should decide if anti-freeze

solution is necessary for each site’s conditions. Corrosion inhibitor however should always be used.

When using chemical cleansers and inhibitors always follow manufacturer’s instructions and ensure the product is appropriate for the materials used in the water circuit

Minimum amount of water required in the space heating/cooling circuit

Outdoor heat pump unit Minimum water quantity [L]

Packaged model PUHZ-W50 40

PUHZ-W85 60 PUHZ-HW112

PUHZ-HW140 100

Split model PUHZ-RP35 32

PUHZ-RP50 40 PUHZ-RP60 50 PUHZ-(H)RP71 60 PUHZ-(H)RP100 80 PUHZ-(H)RP125 100 PUHZ-RP140 120 PUHZ-SW40 32 PUHZ-SW50 40 PUHZ-SW75 60 PUHZ-SW100 80 PUHZ-SW120 120 PUHZ-SHW80 60

PUHZ-SHW112

PUHZ-SHW140 100

Screw

Page 20

Installation

Anti-freeze should always be used for packaged model systems (see section 4.2 for instruction). It is the responsibility of the installer to decide

if anti-freeze solution should be used in split model systems depending on each site’s conditions. Corrosion inhibitor should be used in both split model and packaged model systems. When connecting metal pipes of different materials insulate the joints to prevent a corrosive reaction taking place which will damage the pipework.

•

5. Check for leakages. If leakage is found, retighten the screws onto the connections.

6. Pressurise system to 1 bar.

7. Release all trapped air using air vents during and following heating period.

8. Top up with water as necessary. (If pressure is below 1 bar)

Filling the System (Primary Circuit)

Filling

1. Check all connections including factory tted ones are tight.

2. Insulate pipework between hydrobox and outdoor unit.

3. Thoroughly clean and ush, system of all debris. (see section 4.2 for instruction.)

4. Fill hydrobox with potable water. Fill primary heating circuit with water and suitable anti-freeze and inhibitor as necessary. Always use a lling loop with

double check valve when lling the primary circuit to avoid back ow

contamination of water supply.

4.3 Water Pipe Work

Note: Prevent the eld piping from straining the piping on the hydrobox by

xing it to a wall or applying other methods.

Hot Water Pipework

The function of the following safety components of the hydrobox should be checked on installation for any abnormalities;

• Pressure relief valve

• Expansion vessel pre-charge (gas charge pressure)

The instruction on the following pages regarding safe discharge of hot water from Safety devices should be followed carefully.

• The pipework will become very hot, so should be insulated to prevent burns.

• When connecting pipework, ensure that no foreign objects such as debris or the like do not enter the pipe.

Hydraulic Filter Work (ONLY EHPX series)

Install a hydraulic lter or strainer (eld supply) at the water intake (“Pipe B” in Fig.3.5, also see associated schematic Fig.3.10)

Pipework Connections

Connections to the hydrobox should be made using the 28 mm compression as

appropriate. (except for ERSC series) Do not over-tighten compression ttings as this will lead to deformation of the olive

ring and potential leaks.

Note: To weld the pipes in the eld, cool the pipes on the hydrobox using wet

towel etc. ERSC series have G1 (male) thread connections.

Insulation of Pipework

•

All exposed water pipework should be insulated to prevent unnecessary heat loss and condensation. To prevent condensate entering the hydrobox, the pipework and connections at the top of the hydrobox should be carefully insulated.

• Cold and hot water pipework should not be run close together where possible, to avoid unwanted heat transfer.

• Pipework between outdoor heat pump unit and hydrobox should be insulated

with suitable pipe insulation material with a thermal conductivity of ≤ 0.04 W/

m.K.

Drain Pipework (ONLY ERSC series)

The drain pipe should be installed to drain condensing water in Cooling mode.

Securely install the drain pipe to prevent leakage from the connection.

Securely insulate the drain pipe to prevent water dripping from the eld supplied

drain pipe.

Install the drain pipe at a down slope of 1/100 or more.

Do not place the drain pipe in drain channel where sulfuric gas exists. After installation, check that the drain pipe drains water properly from the outlet of the pipe.

1. Apply polyvinyl chloride type adhesive over the shaded surfaces inside of the drain pipe and on the exterior of the drain socket as shown.

2. Insert the drain socket deeply into the drain pipe <Figure 4.3.1>.

Note: Securely support the eld supplied drain pipe using pipe support to

avoid the drain pipe falling from the drain socket.

Check that the drain pipe drains water properly from the outlet of the pipe. Check for no leakage from the connection.

Note: Always check drainage at installation regardless of season.

Remove the front panel and pour water of 1 liter into the drain pan <Figure

4.3.2>.

Note: Pour water slowly into the drain pan so that water does not overow

from the drain pan.

•

Field supplied drain pipe

(VP-20)

Apply polyvinyl chloride type adhesive

Drain socket

Do not pour water into these openings.

Page 21

Installation

* If the water ow rate is less than 7.1 L/min, the ow switch will be activated.

If the water ow rate exceeds 27.7 L/min, the ow speed will be greater than 1.5 m/s, which could erode the pipes.

Water Circulation Pump Characteristics

Pump speed can be selected by main controller setting (see <Figure 4.3.4 -

4.3.7>). Adjust the pump speed setting so that the ow rate in the primary circuit is appropriate for the outdoor unit installed (see Table 4.3.1). It may be necessary to add an additional pump to the system depending on the length and lift of the primary circuit.

<Second pump > If a second pump is required for the installation please read the following carefully. If a second pump is used in the system it can be positioned in 2 ways. The position of the pump inuences which terminal of the FTC4 the signal cable should be wired to. If the additional pump(s) have current greater than 1A please use appropriate relay. Pump signal cable can either be wired to TBO.1 1-2 or CNP1 but not both.

Option 1 (Space heating only) If the second pump is being used for the heating circuit only then the signal cable should be wired to TBO.1 terminals 3 and 4 (OUT2). In this position the pump can be run at a different speed to the hydrobox’s in-built pump.

Option 2 (Primary circuit DHW and space heating) If the second pump is being used in the primary circuit between the hydrobox and the outdoor unit (Package system ONLY) then the signal cable should be wired to TBO.1 terminals 1 and 2 (OUT1). In this position the pump speed MUST match the speed of the hydrobox’s in-built pump.

Note: Refer to 5.2 Connecting inputs/outputs.

Sizing Expansion Vessels

Expansion vessel volume must t the local system water volume. To size an expansion vessel both for the heating and cooling circuits the following formula and graph can be used. When the necessary expansion vessel volume exceeds the volume of an built-in expansion vessel, install an additional expansion vessel so that the sum of the volumes of the expansion vessels exceeds the necessary expansion vessel volume. * For installation of an EHSC-*M*EB model, provide and install an expansion

vessel in the eld as the model does not come tted with an expansion vessel.

V =

ε × G

1 −

P¹ + 0.098 P² + 0.098

Where;

V : Necessary expansion vessel volume [L] ε : Water expansion coefcient G : Total volume of water in the system [L]

: Expansion vessel setting pressure [MPa]

: Max pressure during operation [MPa]

Graph to the right is for the following values

ε : at 70 °C = 0.0229

: 0.1 MPa

: 0.3 MPa

*A 30% safety margin has been added.

50 100 150 200 250 300 350 400

Expansion vessel sizing

Expansion vessel volume [L]

System water volume [L]

Outdoor heat pump unit Water ow rate range [L/min]

Packaged PUHZ-W50 7.1 - 14.3

PUHZ-W85 10.0 - 25.8 PUHZ-HW112 14.4 - 27.7 PUHZ-HW140 17.9 - 27.7

Split PUHZ-RP35

7.1 - 11.8 PUHZ-RP50 7.1 - 17.2 PUHZ-RP60 8.6 - 20.1 PUHZ-(H)RP71 10.2 - 22.9 PUHZ-(H)RP100 14.4 - 27.7 PUHZ-(H)RP125 17.9 - 27.7 PUHZ-RP140 20.1 - 27.7 PUHZ-SW40 7.1 - 11.8 PUHZ-SW50 7.1 - 17.2 PUHZ-SW75 10.2 - 22.9 PUHZ-SW100 14.4 - 27.7 PUHZ-SW120 20.1 - 27.7 PUHZ-SHW80 10.2 - 22.9 PUHZ-SHW112 14.4 - 27.7 PUHZ-SHW140 17.9 - 27.7

Page 22

0.0

10.0

20.0

30.0

40.0

50.0

60.0

70.0

80.0

0.0 5.0 10.0 15.0 20.0 25.0 30.0 35.0 40.0

0.0

10.0

20.0

30.0

40.0

50.0

60.0

70.0

80.0

0.0 5.0 10.0 15.0 20.0 25.0 30.0 35.0 40.0

0.0

10.0

20.0

30.0

40.0

50.0

60.0

70.0

80.0

0.0 5.0 10.0 15.0 20.0 25.0 30.0 35.0 40.0

0.0

10.0

20.0

30.0

40.0

50.0

60.0

70.0

80.0

0.0 5.0 10.0 15.0 20.0 25.0 30.0 35.0 40.0

Installation

Piping diagram for 2-zone temperature control

The following component parts are required for piping for 2-zone control operation. Arrange the following component parts.

Mixing tank (eld supply) Motorized mixing valve (eld supply) Water circulation pump (× 2) (eld supply) Flow switch (× 2) (eld supply) Thermistor (× 4) *2 sets of (PAC-TH011-E) thersmistors are required.

Wire the component parts to the water circuit referring to <Figure 4.3.9.>. For more details on wiring, refer to “5.3 Wiring for 2-zone temperature controls”.

Note: Do not install the thermistors on the mixing tank. This could affect

correct monitoring of ow and return temperatures through each

zone.

Install the Zone2 ow temp. thermistor (THW8) near the mixing valve.

•

Thermistor (THW6): Zone1 ow temp. Thermistor (THW7): Zone1 return temp. Thermistor (THW8): Zone2 ow temp. Thermistor (THW9): Zone2 return temp.

THW6

THW7

THW8

THW9

Mixing tank

Motorized mixing valve

Water circulation pump 2

(Zone1)

Flow switch 2 (Zone1)

Water circulation pump 3

(Zone2)

Flow switch 3 (Zone2)

Heat emitters (Zone1)

Heat emitters (Zone2)

Safety Device Connections

The hydrobox contains a pressure relief valve. (see <Figure 4.3.8>) The connection size is G1/2” female. The installer MUST connect appropriate discharge pipework from this valve in accordance with local and national regulations.

Failure to do so will result in discharge from the pressure relief valve directly into the hydrobox and cause serious damage to the product.

All pipework used should be capable of withstanding discharge of hot water. Relief valves should NOT be used for any other purpose, and their discharges

should terminate in a safe and appropriate manner in accordance with local regulation requirements.

Note: Beware that the manometer and the pressure relief valve are NOT

strained on its capillary side and on its inlet side respectively. If a pressure relief valve is added, it is essential that no check valve or isolation valve is tted between the hydrobox connection and the added pressure relief valve (safety matter).

Factory-fitted pressure relief valve (G1/2” female connection)

Discharge to drain

(pipe MUST be tted by installer).

Water Circulation Pump Characteristics

EHSC, ERSC series

EHPX series * (with PUHZ-W50)

External static pressure [kPa]

Flow rate [L/min]

* For installation of EHPX series, set its pump speed with a pressure drop between the hydrobox and the outdoor unit factored into the external static pressure.

Speed 5 (Default)

Speed 4

Speed 3

Speed 2

Speed 1

External static pressure [kPa]

Speed 5 (Default)

Speed 4

Speed 3

Speed 2

Speed 1

Speed 5 (Default)

Speed 4

Speed 3

Speed 2

Speed 1

Speed 5 (Default)

Speed 4

Speed 3

Speed 2

Speed 1

Flow rate [L/min] Flow rate [L/min] Flow rate [L/min]

EHPX series * (with PUHZ-W85) EHPX series * (with PUHZ-HW112/140)

External static pressure [kPa]

Page 23

Installation

90 0.5

R0.4~R0.8

45 2

 









Die Copper pipe

4.4 Refrigerant Pipework (Split Model Systems only)

Installation of refrigerant pipework MUST only be done by a technician with rele-

vant qualications. Installation requirements may differ depending on the outdoor

unit selected. Please also refer to outdoor unit installation manual when connecting refrigerant pipework.

Gas side pipe size (mm) Liquid side Pipe size (mm)

ø15.88

ø9.52

Precautions

For devices that use R410A refrigerant

• Use ester oil, ether oil or alkylbenzene oil (small amount) as the refrigeration oil applied to the ared sections.

• Use C1220 copper phosphorus for copper and copper alloy seamless pipes, to

connect the refrigerant pipes. Use refrigerant pipes with the thicknesses speci-

ed in the table below. Make sure the insides of the pipes are clean and do

not contain any harmful contaminants such as sulfuric compounds, oxidants, debris, or dust.

Warning:

When installing or moving the heat pump system, use only the specied

refrigerant (R410A) to charge the refrigerant lines. Do not mix it with any other refrigerant and do not allow air to remain in the lines. Air enclosed in the lines can cause pressure peaks resulting in a rupture and other hazards.

Capacity 35 - 50 60 - 140

Liquid pipe ø6.35 thickness 0.8 mm ø9.52 thickness 0.8 mm

Gas pipe ø12.7 thickness 0.8 mm ø15.88 thickness 1.0 mm

• Do not use pipes thinner than those specied above.

Connecting pipes (Figure 4.4.1)

• When commercially available copper pipes are used, wrap liquid and gas

pipes with commercially available insulation materials (heat-resistant to 100 °C or more, thickness of 12 mm or more).

• Apply thin layer of refrigerant oil to pipe and joint seating surface before tight

ening are nut.

• Use two wrenches to tighten piping connections.

• Use refrigerant piping insulation to insulate indoor unit connections.

Copper pipe O.D.

(mm)

Flare nut O.D.

(mm)

Tightening torque

(N·m)

ø6.35 17 14 - 18 ø6.35 22 34 - 42 ø9.52 22 34 - 42 ø12.7

26 49 - 61

ø12.7

29 68 - 82

ø15.88

29 68 - 82

ø15.88

36 100 - 120

Copper pipe O.D.

(mm)

Flare dimensions

øA dimensions (mm)

ø 6.35 8.7 - 9.1

ø9.52 12.8 - 13.2 ø12.7 16.2 - 16.6

ø15.88 19.3 - 19.7

Copper pipe O.D.

(mm)

B (mm)

Flare tool for R410A

Clutch type

ø6.35 (1/4") 1.0 - 1.5 ø9.52 (3/8") 1.0 - 1.5 ø12.7 (1/2") 1.0 - 1.5

ø15.88 (5/8") 1.0 - 1.5

Match the outer diameter of the refrigerant pipe between the outdoor unit and hydrobox with that of the refrigerant pipe on the outdoor unit. If they do not match, connect the following adapter to the refrigerant pipe on the hydrobox.

Model name

Connected pipes

diameter (mm)

Diameter A

(mm)

Diameter B

(mm)

PAC-SH50RJ-E ø15.88 → ø12.7 ø15.88 (5/8 F) ø12.7 (1/2 F) PAC-SH30RJ-E ø9.52 → ø6.35 ø9.52 (3/8 F) ø6.35 (1/4 F)

Flare cutting dimensions Flare nut tightening torque

Apply refrigerating machine oil over the entire are seat surface. Use correct are nuts matching the pipe size of the outdoor unit.

Page 24

4.5.1

4.5.44.2.1

Installation

ECB1

TB1

ECB1

Hydrobox NOTICE

1. When the hydrobox leaves the factory, the main controller cable (Fig. 4.5.2) on the main unit is not connected to the controller’s relay connector (Fig. 4.5.3) on

the front panel.

After completing installation and wiring in the eld, connect the main controller

cable to the relay connector, then turn on the power.

Relay

connector

Main unit

Front panel (back view)

Breaker abbreviation Meaning

ECB1

Earth leakage circuit breaker for booster heater

TB1 Terminal block 1

4.5 Electrical Connection

All electrical work should be carried out by a suitably qualied technician. Failure to comply with this could lead to electrocution, re, and death. It will also invali-

date product warranty. All wiring should be according to national wiring regulations.

The hydrobox can be powered in two ways.

1. Power cable is run from the outdoor unit to the hydrobox.

2. Hydrobox has independent power source.

Connections should be made to the terminals indicated in the gures to the left

below depending on the phase.

Booster heater and immersion heater should be connected independently from one another to dedicated power supplies.

Locally supplied wiring should be inserted through the inlets situated on the

base of the hydrobox. (Refer to <Table 3.7-3.9>.

Wiring should be fed down the right hand side of the control and electrical

box and clamped in place using clips provided.

The wires should be inserted individually through the cable inlets as below.

Output wires Signal input wires

Wireless receiver (option) wire

(PAR-WR51R-E)

to Power line and indoor-outdoor wire Connect the outdoor unit – hydrobox connecting cable to TB1. Connect the power cable for the booster heater to ECB1.



2. Before setting up the system, insert the included SD memory card.

(For more details, refer to section 5.6.)

Main unit

• Make sure that ECB1 is ON.

<1 phase> <3 phase>

Page 25

L N

S1 S2 S3

S1 S2

TB1

L N

ECB1

L N

Earth

leakage

circuit

breaker

Outdoor unit

Power supply ~/N 230V 50Hz

Wiring

circuit

breaker or

Isolating

switch

To control board

For booster heater (Primary circuit)

Hydrobox

Wiring

circuit

breaker or

Isolating

switch

Power supply ~/N 230V 50Hz

Installation

Option 1: Hydrobox powered via outdoor unit

<1 phase>

Electrical connections 1 phase

Description Power supply Capacity Breaker Wiring

Booster heater (Primary circuit) ~/N 230 V 50 Hz 2 kW 16 A *1 2.5 mm²

6 kW 32 A *1 6.0 mm²

Wiring

Wiring No.

× size (mm²)

Hydrobox - Outdoor unit *2 3 × 1.5 (polar)

Hydrobox - Outdoor unit earth

*2 1 × Min. 1.5

Circuit

rating

Hydrobox - Outdoor unit S1 - S2 *3

230V AC

Hydrobox - Outdoor unit S2 - S3 *3 24V DC

*1. A breaker with at least 3.0 mm contact separation in each pole shall be provided. Use earth leakage breaker (NV).

The breaker shall be provided to ensure disconnection of all active phase conductors of the supply.

*2. Max. 45 m

If 2.5 mm² used, Max. 50 m If 2.5 mm² used and S3 separated, Max. 80 m

*3. The values given in the table above are not always measured against the ground value.

Notes: 1. Wiring size must comply with the applicable local and national codes.

2.Indoorunit/outdoorunitconnectingcordsshallnotbelighterthanpolychloroprenesheathedexiblecord.(Design60245IEC57) Indoorunitpowersupplycordsshallnotbelighterthanpolychloroprenesheathedexiblecord.(Design60227IEC53)

3.Installanearthlongerthanothercables.

4. Please keep enough output capacity of power supply for each heater. The lack of the power supply capacity might cause chattering.

*1 If the installed earth leakage circuit breaker does not have an over-current protection function, install a breaker with that function along the same

power line.

*2 Afx label A that is included with the manuals near each wiring diagram for hydrobox and outdoor units.

Page 26

L1 L2

S1 S2 S3

S1 S2

TB1

L2 L3

ECB1

Earth

leakage

circuit

breaker

Outdoor unit

Power supply 3~ 400V 50Hz

Wiring circuit

breaker or

Isolating

switch

To control board

For booster heater (Primary circuit)

Hydrobox

Wiring

circuit

breaker or

Isolating

switch

Power supply 3N~ 400V 50Hz

Installation

<3phase>

Electrical connections 3 phase

Description Power supply Capacity Breaker Wiring

Booster heater (Primary circuit)

3~ 400V 50Hz 9 kW 16 A *1 2.5 mm²

Wiring

Wiring No.

× size (mm²)

Hydrobox - Outdoor unit *2 3 × 1.5 (polar)

Hydrobox - Outdoor unit earth *2 1 × Min. 1.5

Circuit

rating

Hydrobox - Outdoor unit S1 - S2 *3 230V AC

Hydrobox - Outdoor unit S2 - S3 *3 24V DC

*1. A breaker with at least 3.0 mm contact separation in each pole shall be provided. Use earth leakage breaker (NV).

The breaker shall be provided to ensure disconnection of all active phase conductors of the supply.

*2. Max. 45 m

If 2.5 mm² used, Max. 50 m If 2.5 mm² used and S3 separated, Max. 80 m

*3.

The values given in the table above are not always measured against the ground value.

Notes: 1. Wiring size must comply with the applicable local and national codes.

3.Installanearthlongerthanothercables.

4. Please keep enough output capacity of power supply for each heater. The lack of the power supply capacity might cause chattering.

*1 If the installed earth leakage circuit breaker does not have an over-current protection function, install a breaker with that function along the same

power line.

*2 Afx label A that is included with the manuals near each wiring diagram for hydrobox and outdoor units.

Page 27

CN01

L N

S1 S2

S1 S2 S3

TB1

ECB1

L N

For booster heater (Primary circuit)

To control board

Outdoor unit

Wiring circuit

breaker or

Isolating

switch

Earth

leakage

circuit

breaker

Power supply ~/N 230V 50Hz

Earth

leakage

circuit

breaker

Wiring

circuit

breaker or

Isolating

switch

Wiring

circuit

breaker or

Isolating

switch

Power supply ~/N 230V 50Hz

Hydrobox

Initial settings (Power supplied by outdoor unit)

Hydrobox

control board

Modied settings (Separate power

supply to

the hydrobox)

BLACK

YELLOW

BLACK

YELLOW

BLACK

Hydrobox

control board

Black

Installation

Option2: Hydrobox powered by independent source

If the hydrobox and outdoor units have separate power supplies, the following requirements MUST be carried out:

•Change connector connections inhydrobox control andelectricalbox (seeFigure4.5.7).

•TurntheoutdoorunitDIPswitchSW8-3toON.

•TurnontheoutdoorunitBEFOREthehydrobox.

<1 phase>

Electrical connections 1 phase

Description Power supply Capacity Breaker Wiring

Booster heater (Primary circuit) ~/N 230 V 50 Hz 2 kW 16 A *1 2.5 mm²

6 kW 32 A *1 6.0 mm²

Hydrobox power supply ~/N 230 V 50 Hz Hydrobox input capacity

Main switch (Breaker)

16 A

Wiring

Wiring No.

× size (mm²)

Hydrobox power supply 2 × Min. 1.5 Hydrobox power supply earth 1 × Min. 1.5 Hydrobox - Outdoor unit *2 2 × Min. 0.3 Hydrobox - Outdoor unit earth —

Circuit

rating

Hydrobox L - N *3 230V AC Hydrobox - Outdoor unit S1 - S2 *3 — Hydrobox - Outdoor unit S2 - S3 *3 24V DC

*1. A breaker with at least 3.0 mm contact separation in each pole shall be provided. Use earth leakage breaker (NV).

The breaker shall be provided to ensure disconnection of all active phase conductors of the supply. *2. Max. 120 m *3.

The values given in the table above are not always measured against the ground value.

Notes: 1. Wiring size must comply with the applicable local and national codes.

3.Installanearthlongerthanothercables.

4. Please keep enough output capacity of power supply for each heater. The lack of the power supply capacity might cause chattering.

*1 If the installed earth leakage circuit breaker does not have an over-current protection function, install a breaker with that function along the same

power line.

*2 Afx label B that is included with the manuals near each wiring diagram for hydrobox and outdoor units.

Page 28

L1 L2

S1 S2 S3

S1 S2

TB1

L2 L3

ECB1

Earth

leakage

circuit

breaker

Outdoor unit

Power supply 3N~ 400V 50Hz

Wiring

circuit

breaker or

Isolating

switch

To control board

For booster heater (Primary circuit)

Hydrobox

Wiring circuit

breaker or

Isolating

switch

Power supply ~/N 230V 50Hz

Earth

leakage

circuit

breaker

Wiring

circuit

breaker or

Isolating

switch

Power supply 3~ 400V 50Hz

Installation

<3 phase>

Electrical connections 3 phase

Description Power supply Capacity Breaker Wiring

Booster heater (Primary circuit) 3~ 400V 50Hz 9 kW 16 A *1 2.5 mm²

Hydrobox power supply ~/N 230 V 50 Hz Hydrobox input capacity

Main switch (Breaker)

16 A

Wiring

Wiring No.

× size (mm²)

Hydrobox power supply 2 × Min. 1.5 Hydrobox power supply earth 1 × Min. 1.5 Hydrobox - Outdoor unit *2 2 × Min. 0.3 Hydrobox - Outdoor unit earth —

Circuit

rating

Hydrobox L - N *3 230V AC Hydrobox - Outdoor unit S1 - S2 *3 — Hydrobox - Outdoor unit S2 - S3 *3 24V DC

*1. A breaker with at least 3.0 mm contact separation in each pole shall be provided. Use earth leakage breaker (NV).

The breaker shall be provided to ensure disconnection of all active phase conductors of the supply. *2. Max. 120 m *3.

The values given in the table above are not always measured against the ground value.

Notes: 1. Wiring size must comply with the applicable local and national codes.

3. Install an earth longer than other cables.

4. Please keep enough output capacity of power supply for each heater. The lack of the power supply capacity might cause chattering.

*1 If the installed earth leakage circuit breaker does not have an over-current protection function, install a breaker with that function along the same power line.

*2 Afx label B that is included with the manuals near each wiring diagram for hydrobox and outdoor units.

Page 29

System Set Up

5.1 Dip Switch Functions

Located on the FTC4 printed circuit board are 4 sets of small white switches known as Dip switches. The Dip switch number is printed on the circuit board next to the relevant switches. The word ON is printed on the circuit board and on the Dip switch block itself. To move the switch you will need to use a pin or the corner of a thin metal ruler or similar.

Dip switch settings are listed below in Table 5.1.1. Make sure to turn off both indoor unit and outdoor unit power supplies before changing the switch settings.

Dip switch Function OFF ON

Default settings:

Indoor unit model

SW1

SW1-1

Boiler WITHOUT Boiler WITH Boiler OFF

SW1-2

Heat pump maximum outlet water temperature 55ºC 60ºC ON *1

SW1-3

DHW tank WITHOUT DHW tank WITH DHW tank OFF

SW1-4

Immersion heater WITHOUT Immersion heater WITH Immersion heater OFF

SW1-5

Booster heater WITHOUT Booster heater WITH Booster heater ON

SW1-6

Booster heater function For heating only For heating and DHW ON

SW1-7

Outdoor unit type Split type Packaged type

OFF: E*SC-*M*B ON : EHPX-*M*B

SW1-8

Wireless remote controller WITHOUT Wireless remote controller WITH Wireless remote controller OFF

SW2

SW2-1

Room thermostat1 input (IN1) logic change

Zone1 operation stop at thermostat short

Zone1 operation stop at thermostat open

OFF

SW2-2 Flow switch1 input (IN2) logic change Failure detection at short Failure detection at open ON

SW2-3 Booster heater capacity restriction Inactive Active

OFF: Except

EHPX-VM2B

ERSC-VM2B

ON : EHPX-VM2B

ERSC-VM2B

SW2-4 Cooling mode function Inactive Active

OFF: Except

ERSC-VM2B

ON : ERSC-VM2B

SW2-5

Automatic switch to backup heat source operation

(When outdoor unit stops by error)

Inactive Active *2 OFF

SW2-6 Mixing tank WITHOUT Mixing tank WITH Mixing tank OFF

SW2-7 2-zone temperature control Inactive Active OFF

SW2-8 — — - OFF

SW3

SW3-1

Room thermostat 2 input (IN6) logic change

Zone2 operation stop at thermostat short

Zone2 operation stop at thermostat open

OFF

SW3-2 Flow switch 2 input (IN3) logic change Failure detection at short Failure detection at open OFF

SW3-3 Flow switch 3 input (IN7) logic change Failure detection at short Failure detection at open OFF SW3-4 Cooling operation in Zone2 Not in use In use OFF

SW3-5 Heating mode function *3 Inactive Active OFF SW3-6 — — — OFF SW3-7 — — — OFF SW3-8 — — — OFF

SW4

SW4-1

Multiple outdoor units control Inactive Active OFF SW4-2 Position of multiple outdoor units control *4 Slave Master OFF SW4-3 — — — OFF SW4-4 — — — OFF

SW4-5 Emergency mode (Heater only operation) Normal

"Emergency mode (Heater only operation) (To be activated only when powered ON)"

OFF *5

SW4-6 Emergency mode (Boiler operation) Normal

"Emergency mode (Boiler operation) (To be activated only when powered ON)"

OFF *5

Note: 1. When the hydrobox is connected with a PUHZ-RP outdoor unit of which maximum outlet water temperature is 55ºC, Dip SW1-2 must be changed to

OFF.

2. OUT11 will be available. For safety reasons, this function is not available for certain errors. (In that case, system operation must be stopped and only the water circulation pump keeps running.)

3 This switch functions only when the hydrobox is connected with a PUHZ-FRP outdoor unit. When another type of outdoor unit is connected, the

heating mode function is active regardless of the fact that this switch is ON or OFF.

4. SW4-2 is available only when SW4-1 is ON.

5. If emergency mode is no longer required, return the switch to OFF position.

SW1

SW4

SW2

SW3

5. System Set UP

Page 30

System Set Up

CNP1(WHT)

TBI.1

CNV1 (WHT)

FTC 4

TBO.2

TBO.1

SW3

181

１

２

３

４

５

６

７

８

９

１０

１１

１２

１３

１４

１

２

３

４

５

６

７

８

９

１０

１１

１２

１３

１４

CN01 (BLK)

CN3C (BLU)

CNBH (WHT)

CNBC 　(GRY)

CNBHT 　(BLK)

CNIH 　(ORN)

CN22 (BLU)

CN2F (YLW)

CN20 (RED)

CN21 (YLW)

CNW12 (RED)

CNW5 (WHT)

CNW3 (WHT)

１

３

２

４

５

７

６

８９１０

１１

１３

１２

１４

TBI.2

１

３

２

４

５

７

６

８９１０

１１

１３

１２

１４

LED1

LED2

CNPWM (WHT)

SW2

SW1

SW4

CN108

CNRF (WHT)

LED4

LED5

LED3

CN105 (RED)

5.2 Connecting inputs/outputs

When the wires are wired to adjacent terminals use ring terminals and insulate the wires.

Signal inputs

Name Terminal block Connector Item OFF (Open) ON (Short)

IN1 TBI.1 1-2 — Room thermostat 1 input Refer to SW2-1 in <5.1 Dip Switch Functions>. IN2 TBI.1 3-4 CN2F Flow switch 1 input Refer to SW2-2 in <5.1 Dip Switch Functions>. IN3 TBI.1 5-6 — Flow switch 2 input (Zone1) Refer to SW3-2 in <5.1 Dip Switch Functions>. IN4 TBI.1 7-8 — Demand control input

Normal Heat source OFF/ Boiler operation *2

IN5 TBI.1 9-10 — Outdoor thermostat input (*1)

Standard operation Heater operation/ Boiler operation *2 IN6 TBI.1 11-12 — Room thermostat 2 input Refer to SW3-1 in <5.1 Dip Switch Functions>. IN7 TBI.1 13-14 — Flow switch 3 input (Zone2) Refer to SW3-3 in <5.1 Dip Switch Functions>.

*1. If using outdoor thermostat for controlling operation of heaters, the lifetime of the heaters and related parts may be reduced. *2. To turn on the boiler operation, use the main controller to select “Boiler” in “External input setting“ screen in the service menu.

Item Name Model and specications

Si gnal input function

Si gnal input wire

Use sheathed vinyl coated cord or cable. Max. 10 m Wire type: CV, CVS or equivalent Wire size: Stranded wire 0.5 mm² to 1.25 mm²

Solid wire: ø0.65 mm to ø1.2 mm

Switch Non-voltage “a” contact signals

Remote switch: minimum applicable load 12V DC, 1mA

Wiring specication and eld supply parts

Thermistor inputs

Name Terminal block Connector Item Optional part model

TH1 — CN20 Thermistor (Room temp.) (Option)*1 PAC-SE41TS-E TH2 — CN21 Thermistor (Ref. liquid temp.) — THW1 — CNW12 1-2 Thermistor (Flow water temp.) — THW2 — CNW12 3-4 Thermistor (Return water temp.) — THW5 — CNW5 Thermistor (DHW tank water temp.) (Option)*1 PAC-TH011TK-E THW6 TBI.2 7-8 — Thermistor (Zone1 ow water temp.) (Option)*1

PAC-TH011-E

THW7 TBI.2 9-10 — Thermistor (Zone1 return water temp.) (Option)*1 THW8 TBI.2 1-2 — Thermistor (Zone2 ow water temp.) (Option)*1

PAC-TH011-E

THW9 TBI.2 11-12 — Thermistor (Zone2 return water temp.) (Option)*1 THWB1 TBI.2 3-4 — Thermistor (Boiler ow water temp.) (Option)*1

PAC-TH011HT-E

THWB2 TBI.2 5-6 — Thermistor (Boiler return water temp.) (Option)*1

Do not splice the wiring to extend or shorten it, or this could affect correct monitoring of each temperature. If the wiring is too long, bundle it with a strap to adjust the length. *1. The maximum length of the thermistor wiring is 5 m. When the wires are wired to adjacent terminals, use ring terminals and insulate the wires.

Page 31

System Set Up

5.3 Wiring for 2-zone temperature control

1. Water circulation pump 2 (Zone1 water circulation pump) / Water circulation pump 3 (Zone2 water circulation pump)

Electrically wire water circulation pumps 2 and 3 to the appropriate output terminals. (Refer to “Outputs” in 5.2.)

2. Flow switch 2 (Zone1 ow switch) / Flow switch 3 (Zone2 ow switch)

Connect ow switches 2 and 3 to the appropriate terminals. (Refer to “Signal inputs” in 5.2.) Set dip switches 3-2 and 3-3 according to the functions of individual ow switches 2 and 3. (Refer to “Dip switch functions” in 5.1.)

3. Thermistor

Connect the thermistor to monitor the Zone1 ow temp. to the THW6 (TBI. 2-7 and 2-8) terminals. Connect the thermistor to monitor the Zone1 return temp. to the THW7 (TBI. 2-9 and 2-10) terminals. Connect the thermistor to monitor the Zone2 ow temp. to the THW8 (TBI. 2-1 and 2-2) terminals. Connect the thermistor to monitor the Zone2 return temp. to the THW9 (TBI. 2-11 and 2-12) terminals.

The maximum length of the thermistor wiring is 5 m. Do not splice the wiring to extend or shorten it, or this could affect correct monitoring of each hot water temperature through zones. If the wiring is too long, bundle it with a strap to adjust the length.

4. Motorized mixing valve

Connect three wires coming from the motorized mixing valve to the appropriate terminals referring to “Outputs” in 5.2.

Note: Connect the signal line to open Port A (hot water inlet port) to TBO. 1-14 (Open), the signal line to open Port B (cold water inlet port) to TBO. 1-12 (Close) ,

and the neutral terminal wire to TBO. 1-13 (N).

121314

FTC4

TBO.1

Close N Open

from mixing tank

to mixing tank

to Zone2 heat emitter

from Zone2 heat emitter

Motorized mixing valve

Note:

1. When the hydrobox is powered via outdoor unit, the maximum grand total cur

rent of (a)+(b) is 3.0 A.

2. Do not connect multiple water circulation pumps directly to each output (OUT1, OUT2, and OUT3). In such a case, connect them via (a) relay(s).

3. Do not connect water circulation pumps to both TBO.1 3-4 and CNP1 at the same time.

4. Connect an appropriate surge absorber to OUT10 (TBO.1 1-2) depending on the load at site.

Wiring specication and eld supply parts

Item Name Model and specications

External output function

Outputs wire

Use sheathed vinyl coated cord or cable.

Max. 30 m

Wire type: CV, CVS or equivalent

Wire size: Stranded wire 0.5 mm² to 1.25 mm²

Solid wire: ø0.65 mm to ø1.2 mm

Outputs

Name Terminal block Connector Item OFF ON Signal/Max current Max. total current

OUT1 TBO.1 3-4 CNP1

Water circulation pump 1 output (Space heating & DHW) OFF ON 230V AC 1.0 A Max 3.0 A (a) OUT2 TBO.1 5-6 — Water circulation pump 2 output (Space heating for Zone1) OFF ON 230V AC 1.0 A Max OUT3 TBO.1 7-8 — Water circulation pump 3 output (Space heating for Zone2) OFF ON 230V AC 1.0 A Max OUT4 TBO.1 9-11 CNV1 3-way valve (2-way valve 1) output Heating DHW 230V AC 0.1 A Max

3.0 A (b)

OUT5

TBO.1 12-13

— Mixing valve output

Stop Close

230V AC 0.1 A Max

TBO.1 13-14

Stop Open OUT6 — CNBH 1-3 Booster heater 1 output OFF ON 230V AC 0.5 A Max (Relay) OUT7 — CNBH 5-7 Booster heater 2 output OFF ON 230V AC 0.5 A Max (Relay) OUT8 TBO.2 11-12 — Booster heater 2+ output OFF ON 230V AC 0.5 A Max (Relay) OUT9 TBO.2 9-10 CNIH Immersion heater output OFF ON 230V AC 0.5 A Max (Relay) OUT11 TBO.2 1-2

— Error output Normal Error 230V AC 0.5 A Max

OUT12

TBO.2 3-4 — Defrost output Normal Defrost 230V AC 0.5 A Max

OUT13

TBO.2 7-8 — 2-way valve 2 output DHW Heating 230V AC 0.1 A Max

OUT10 TBO.1 1-2 — Boiler output OFF ON

non-voltage contact

• 220 - 240V AC (30V DC)

0.5A or less

• 10 mA 5V DC or more

—

Do not connect to the terminals that are indicated as “—” in the “Terminal block” eld.

N L

TBO.1

12 13 149 10 116 7 83 4 51 2

TBO.2

OUT5

OUT1 OUT2 OUT3 OUT4

N L N L N L N L

OUT10

N L

OUT11

N L

OUT12

N L

OUT9

N L

OUT13

N L

OUT8

Open

Page 32

TBO.1 9-11

TBO.2 7-8

TBO.2 9-10

Dip-SW1

Connector CNW5

System Set Up

5.4 Installation procedure for DHW tank

Note:

• Be aware that the respective DHW operations are greatly effected by the selections of the components such as tank, immersion heater, or the like.

• Follow your local regulations to perform system conguration.

1. To enable switching of the water circulation circuit between the DHW mode

and the heating mode, install a 3-way valve (eld supply). The 3-way valve and

the DHW tank should be positioned as shown in the system diagram on the page 13, Figure 3.9 or 3.10 as applicable. The use of two 2-way valves can perform the same function as a 3-way valve.

2. Install the optional thermistor THW5 (optional part PAC-TH011TK-E) on the

DHW tank. It is recommended to position the thermistor at the mid point of the DHW tank

capacity. Insulate thermistor from ambient air. Especially for double (insulated) tank, thermistor should be attached to the inner side (to detect the water temperature).

3. Connect the thermistor lead to the CNW5 connector on the FTC4.

If the thermistor lead is too long bundle it with a strap to adjust the length.

4. The output terminals for the 3-way valve is TBO.1 9-11 (OUT4).

The TBO.1 9-11 terminals on the FTC4 are shown in the wiring diagram on Page 29. Choose the terminals that the 3-way valve is connected to between TBO.1

9-10, or TBO.1 9-11, according to the rated voltage. When the rated current of the 3-way valve exceeds 0.1A, be sure to use a relay with maximum voltage and current ratings of 230V AC / 0.1A when

connecting to the FTC4. Do not directly connect the 3-way valve cable to the FTC4. Connect the relay cable to the TBO.1 9-10 terminals. 3-way valve must be of SPST type. SPDT type can NOT be used. For systems using 2-way valves instead of a 3-way valve please read the following;

Specication of 2-way valve (eld supply)

• Power supply: 230V AC

• Current: 0.1A Max (If over 0.1A you must use a relay)

• Type: Normally closed Installation

position

Electrical connection terminal block

Output signal Heating DHW System

OFF

2-way valve1

DHW TBO.1 9-10 OFF

(closed)

(open)

OFF

(closed)

2-way valve2 Heating TBO.2 7-8 ON

(open)

OFF

(closed)

OFF

(closed)

Note: Should the 2-way valve become blocked the water circulation will stop.

A by-pass valve or circuit should be installed between pump and 2-way valve for safety. The TBO.2 7-8 terminals on the FTC4 are shown in the wiring diagram. The 2-way valve (eld supply) should be installed according to the instructions supplied with it. Follow 2-way valve’s manufacturer’s instructions as to whether to connect an earth cable or not.

• For the 2-way valve, choose the one that slowly opens and shuts off to prevent water hammer sound.

• Choose the 2-way valve equipped with manual override, which is neces

sary for topping up or draining of water.

5. Turn the DIP SW1-3 on the FTC4 to ON.

6. When using an immersion heater (eld supply), connect a contact relay cable for the immersion heater to TBO.2 9-10 (OUT9), and turn the Dip SW1-4 to

ON. Do NOT directly connect the power cable to the FTC4.

Note:

• When an immersion heater is installed, select appropriate breaker capacity and a cable with appropriate diameter on the basis of heater output.

• When wiring an immersion heater in the eld, always install an earth leakage

breaker to prevent accidental electric shock.

WARNING: When connecting DHW tank

(1) Attach the optional thermistor THW5 (PAC-TH011TK-E). (2) Always use earth leakage breaker when connecting immersion heater. (3) When installing an immersion heater, be sure that the immersion heater has a built-in direct cut-off thermostat. (4) Connect a pressure relief valve on the sanitary water side.

(5) It is essential that no check valve or isolating valve is tted between the hydrobox and the pressure relief valve.

Page 33

THW5

THW1

THW2

THW1

THW2

THW5

DHW tank

Heat emitter

Hydrobox

Booster heater

Immersion heater

Heat emitter

Hydrobox

Booster heater

3-way valve (*)

System Set Up

Recommended DHW system

Where system involves a DHW tank:

DHW tank

Immersion

heater

Booster

heater

BH function System diagram Thermistor

Present Absent Present For space

heating/ cooling and DHW

THW1: Flow water temp.

THW2: Return water temp.

THW5: Tank water temp.

(optional part PAC-TH011TK-E)

Present Present Present For space

heating/ cooling and DHW

THW1: Flow water temp.

THW2: Return water temp.

THW5: Tank water temp.

(optional part PAC-TH011TK-E)

*The use of two 2-way valves can perform same function as a 3-way valve.

Page 34

FTC4

20.0°C

FTC4

20.0°C

FTC4

Outdoor unit

Wireless receiver

(option)

Main controller

Wireless remote controller

(option)

Main controller

(remote position)

Max. 8

Room

Hydrobox

Room

Room temperature thermistor (option)

Hydrobox Room

Room temperature

thermostat

(eld supply)

Hydrobox

Room

System Set Up

FTC4

5.5 Remote Controller Options

The hydrobox comes factory tted with a main controller. This incorporates a thermistor for

temperature monitoring and a graphical user interface to enable set-up, view current status and input scheduling functions. The main controller is also used for servicing purposes. This facility is accessed via password protected service menus.

To provide the best efciency Mitsubishi Electric recommends using automatic adaptation

function based on room temperature. To use this function a room thermistor needs to be present in a main living area. This can be done in a number of ways the most convenient are detailed below.

Refer to heating section of this manual for instructions on how to set compensation

curve, ow temp or room temp (Auto adaptation).

For instructions on how to set the thermistor input for the FTC4 please refer to Initial settings section.

The factory setting for space heating mode is set to Room temp. (auto adaptation). If

there is no room sensor present in the system, this setting must be changed to either Compensation curve mode or Flow temp mode.

Note: Auto-adaptation is not available in Cooling mode.

Factory supplied standard

Outdoor unit

Hydrobox

1-zone temperature control

Control option A

This option features the main controller and the Mitsubishi Electric wireless remote controller. The wireless remote controller is used to monitor room temperature and can

be used to make changes to the space heating settings, boost DHW (*1) and switch to

holiday mode without having to directly use the main controller.

If more than one wireless remote controller is used, the most recently requested temperature setting will commonly be applied to all rooms by the central control system regardless of which wireless remote controller was used. No hierarchy exists across these remote controllers.

Wire the wireless receiver to FTC4 referring to the wireless remote controller instruction manual. Turn DIP SW1-8 to ON. Before operation congure the wireless remote controller to transmit and receive data referring to the wireless remote

controller installation manual.)

Control option B

This option features the main controller and the Mitsubishi Electric thermistor wired to FTC4. The thermistor is used to monitor room temperature but can not make any

changes in control operation. Any changes to DHW (*1) must be made using the main

controller mounted on the hydrobox.

Wire the thermistor to the TH1 connector on FTC4. The number of room temperature thermistors that can be connected to FTC4 is always one.

Control option C

This option features the main controller being removed from the hydrobox and situated in a different room. A thermistor built in the main controller can be used for monitoring the room temperature for Auto Adaptation function whilst keeping all its features of the main controller available.

The main controller and FTC4 are connected by a 2-core, 0.3 mm², non-polar cable (eld supply) with a maximum length of 500 m.

To use the sensor in the main controller the main controller should come off from the hydrobox. Otherwise it will detect the temperature of the hydrobox instead of room temperature. This will affect the output of the space heating.

Control option D (Flow temp. or compensation curve only)

This option features the main controller and a locally supplied thermostat wired to FTC4. The thermostat is used to set the maximum temperature for heating room. Any changes

to DHW (*1) must be made using main controller mounted on the hydrobox.

The thermostat is wired to IN1 in TBI.1 on FTC4. The number of thermostats that can be connected to FTC4 is always one.

The wireless remote controller can be also used as a thermostat.

*1 If applicable

Page 35

FTC4

20.0°C

Room temperature thermistor (option)

Room temperature

thermostat

(eld supply)

Main controller

Outdoor unit

Zone1: Room temp. control (Auto adaptation) Zone2: Compensation curve or ow temp. control

Hydrobox

Zone1

Zone2

FTC4

20.0°C

Ma i n con t roll e r

(remote position)

Room temperature

thermostat

(eld supply)

Zone1: Room temp. control (Auto adaptation) Zone2: Compensation curve or ow temp. control

Zone2

Zone1

Hydrobox

Outdoor unit

FTC4

20.0°C

Main controller

Outdoor unit

Room temperature thermostat

(eld supply)

Room temperature

thermostat

(eld supply)

Hydrobox

Zone2

Zone1

Zone1, Zone2: Compensation curve or ow temp. control

FTC4

20.0°C

Room temperature thermostat

(eld supply)

Wireless receiver

(option)

Wireless remote controller

(option)

Outdoor unit

Main controller

Zone1

Zone2

Max. 8

Zone1: Room temp. control (Auto adaptation) Zone2: Compensation curve or ow temp. control

Hydrobox

System Set Up

2-zone temperature control

Control option A

This option features the main controller, the Mitsubishi Electric wireless remote controller and a locally supplied thermostat. The wireless remote controller is used to monitor the Zone1 room temperature and the thermostat is used to monitor the Zone2 room temperature. The thermostat can be also allocated to Zone1 and the wireless remote controller to Zone2.

The wireless remote controller can be also used to make changes to the space heating

settings, boost DHW (*1) and switch to holiday mode without having to use the main

controller.

If more than one wireless remote controller is used, the last temperature setting adjustment/demand will be applied to ALL rooms in same zone.

Wire the wireless receiver to FTC4 referring to the wireless remote controller instruc-

tion manual. Turn DIP SW1-8 to ON. Before operation congure the wireless remote

controller to transmit and receive data referring to the wireless remote controller

installation manual.)

The thermostat is used to set the maximum temperature for heating Zone2 room.

The thermostat is wired to IN6 on FTC4. (If the thermostat is allocated to Zone1, it is wired to IN1 on TBI.1.) (Refer to 5.2.)

Control option B

This option features the main controller, the Mitsubishi Electric thermistor and a locally supplied thermostat that are wired to FTC4. The thermistor is used to monitor the Zone1 room temperature and the thermostat is used to control the Zone2 room temperature.

The thermostat can be also allocated to Zone1 and the thermistor to Zone2. The thermistor can not make any changes in control operation. Any changes to DHW

(*1) must be made using the main controller mounted on the hydrobox.

Wire the thermistor to the TH1 connector on FTC4. The number of room temperature thermistors that can be connected to FTC4 is always one. The thermostat is used to set the maximum temperature for heating Zone2 room.

The thermostat is wired to IN6 on FTC4. (If the thermostat is allocated to Zone1, wire it to IN1 on TBI.1.) (Refer to 5.2.)

Control option C

This option features the main controller (with in-built thermistor) that is removed from

the hydrobox to monitor the Zone1 room temperature and a locally supplied thermostat to monitor the Zone2 room temperature. The thermostat can be also allocated to Zone1 and the thermistor to Zone2.

A thermistor built into the main controller can be used for monitoring the room temperature for Auto Adaptation function whilst keeping all its features of the main controller available.

The main controller and FTC4 are connected by a 2-core, 0.3 mm², non-polar cable (eld supply) with a maximum length of 500 m.

To use the sensor in the main controller the main controller should be detached from the hydrobox. Otherwise it will detect the temperature of the hydrobox instead of room temperature. This will affect the output of the space heating.

The thermostat is used to set the maximum temperature for heating Zone2 room.

The thermostat is wired to IN6 on FTC4. (If the thermostat is allocated to Zone1, wire it to IN1 on TBI.1.) (Refer to 5.2.)

Control option D

This option features the locally supplied thermostats wired to FTC4. The thermostats are individually allocated to Zone1 and Zone2. The thermostats are used to set each

maximum temperature for heating Zone1 and Zone2 rooms. Any changes to DHW (*1)

must be made using the main controller mounted on the hydrobox.

The thermostat for Zone1 is wired to IN1 in TBI.1 on FTC4. The thermostat for Zone2 is wired to IN6 in TBI.1 on FTC4.

*1 If applicable

*2 For the options above, the sensor types can be exchanged between Zone1 and Zone2. (e.g. Wireless remote controller in Zone1 and Room temp thermostat in Zone2 can

be changed to Room temp thermostat and wireless remote controller, respectively).

The wireless remote controller can be also used as a thermostat.

Page 36

10 mm

6 mm

System Set Up

Remote Installation of Main Controller

The following instructions are related to a system controlled as in Control option C.

Removing main controller

Main controller

Opening the main controller

Front plate Back plate

Terminal block for controller -FTC4 connection cable

Securing the connection cable

Securing the back plate to the wall

1. Open front panel of hydrobox. (See section 4.2.)

2. Remove the four screws from the metal back plate of main controller using a screwdriver. (Figure 5.5.1)

3. Untwist wire clip and lift off the metal back plate.

4. Gently pull apart the clips holding the main controller in place. Be careful not to use too much force as this may break the holding clips.

5. Lift out the main controller from the front panel of the hydrobox.

6. Separate the back and front plates using a at head screwdriver as shown in

Figure 5.5.2.

7. Fix the 2 core cable from the FTC4 into the terminal. Ensure the wires make

good contact and are securely screwed into the terminal block. (Figure 5.5.3)

8. The inner core wires should not be visible from the outside of the back plate.

(Figure 5.5.3)

9. The sheathed cable should be pressed into the sunken channel so it is ush

with the back plate.

10. Once the connection cable is in place screw the back plate to the wall using screws (eld supply) suitable for use on the chosen wall. (Figure 5.5.4)

11. Finally replace the front plate.

Note: Wiring for main controller cable shall be (5cm or more) apart from power source wiring so that it is not influenced by electrical noise from power source wiring. (Do NOT insert main controller cable and power source wiring in the same conduit.)

Wire clip

Holding clips

Metal back plate

Page 37

System Set Up

5.6 Using SD memory card

The hydrobox is equipped with an SD memory card interface in FTC4. Using an SD memory card can simplify main controller settings and can store operating logs. *1

(a)

(b)

(a) For insertion, push on the SD memory card until it clicks into place. (b) For ejection, push on the SD memory card until it clicks.

Note: To avoid cutting ngers, do not touch sharp edges of the SD memo

ry card connector (CN108) on the FTC4 control board.

Logos

Capacities

2 GB to 32 GB *2

SD speed classes

All

• The SD Logo is a trademark of SD-3C, LLC. The miniSD logo is a trademark of SD-3C, LLC. The microSD logo is a trademark of SD-3C, LLC.

*1 To edit main controller settings or to check operating data, an Ecodan service

tool (for use with PC) is required.

*2 A 2-GB SD memory card stores up to 30 days of operation logs.

(1) Use an SD memory card that complies with the SD standards. Check that the

SD memory card has a logo on it of those shown to the right.

(2) SD memory cards to the SD standards include SD, SDHC, miniSD, micro SD,

and microSDHC memory cards. The capacities are available up to 32 GB. Choose that with a maximum allowable temperature of 55ºC.

(3) When the SD memory card is a miniSD, miniSDHC, microSD, or micro SDHC

memory card, use an SD memory card converter adapter.

(4) Before writing to the SD memory card, release the write-protect switch.

(5) Before inserting or ejecting an SD memory card, make sure to power off the

system. If an SD memory card is inserted or ejected with the system powered on, the stored data could be corrupted or the SD memory card be damaged. *An SD memory card is live for a whilst after the system is powered off. Before insertion or ejection wait until the LED lamps on the FTC4 control board are all off.

(6) The read and write operations have been verified using the following SD

memory cards, however, these operations are not always guaranteed as the

specications of these SD memory cards could change.

Manufacturer Model Tested in

Verbatim #44015 0912-61 Mar. 2012 SanDisk SDSDB-002G-B35 Oct. 2011 Panasonic RP-SDP04GE1K Oct. 2011 Arvato 2GB PS8032 TSB 24nm MLC Jun. 2012

Before using a new SD memory card (including the card that comes with the unit), always check that the SD memory card can be safely read and written to by the FTC4 controller. <How to check read and write operations>

a) Check for correct wiring of power supply to the system. For more details,

refer to section 4.5.

(Do not power on the system at this point.) b) Insert an SD memory card. c) Power on the system. d) The LED4 lamp lights if the read and write operations are successfully

completed. If the LED4 lamp continues blinking or does not light, the SD

memory card cannot be read or written to by the FTC4 controller.

(7) Make sure to follow the instruction and the requirement of the SD memory

card’s manufacturer.

(8) Format the SD memory card if determined unreadable in step (6). This could

make it readable. Download an SD card formatter from the following site. SD Association homepage: https://www.sdcard.org/home/

(9) FTC4 supports FAT le system but not NTFS le system.

(10) Mitsubishi Electric is not liable for any damages, in whole or in part, including

failure of writing to an SD memory card, and corruption and loss of the saved data, or the like. Back up saved data as necessary.

(11) Do not touch any electronic parts on the FTC4 control board when inserting

or ejecting an SD memory card, or else the control board could fail.

2 GB

Page 38

System Set Up

F1 F2

F3 F4

5.7 Main Controller

Letter Name Function

A Screen Screen in which all information is displayed

B Menu Access to system settings for initial set up and

modications.

C Back Return to previous menu. D Conrm Used to select or save. (Enter key) E Power/Holiday If system is switched off pressing once will turn

system on. Pressing again when system is switched on will enable Holiday Mode. Holding the

button down for 3 secs will turn the system off. (*1)

F1-4

Function keys Used to scroll through menu and adjust settings.

Function is determined by the menu screen visible on screen A.

*1 When the system is switched off or the power supply is disconnected, the hydrobox protection functions (e.g. freeze stat. function) will NOT operate. Please beware that without these safety functions enabled the hydrobox may potentially become exposed to damage.

Icon Description

1 Legionella

prevention

When this icon is displayed ‘Legionella prevention mode’ is active.

2 Heat pump

‘Heat pump’ is running.

Defrosting.

Emergency heating.

3 Electric heater When this icon is displayed the ‘Electric heaters’

(booster or immersion heater) are in use.

4 Target

temperature

Target ow temperature

Target room temperature Compensation curve

5 OPTION

Pressing the function button below this icon will dis-

play the quick view menu. 6 + Increase desired temperature. 7 - Decrease desired temperature. 8 Z1 Z2 Pressing the function button below this icon switch-

es between Zone1 and Zone2.

Information Pressing the function button below this icon displays

the information screen. 9 Space heating

(cooling) mode

Heating mode Zone1 or Zone2

Cooling mode 10 DHW mode Normal or ECO mode 11 Holiday mode

When this icon is displayed ‘Holiday mode’ activated.

Timer Prohibited Stand-by Stop Operating

Current temperature

Current room temperature

Current water temperature of DHW tank 14

The Menu button is locked or the switching of the operation modes between DHW and Heating operations are disabled in the Option screen.

SD memory card is inserted. Normal operation. SD memory card is inserted. Abnormal operation.

B C D

12 11

1 32

15 14

Page 39

Continued to next page.

F3 (PREVIEW)

F4 (EDIT)

F2, F3

F1 F2

F3 (EDIT)

F1 F2

F1 (Zone1)

F2 (Zone2)

F2, F3

*1 When a PUHZ-FRP outdoor unit is connected.

System Set Up

Initial

Main screen

Information Option

Forced DHW ON/OFF DHW ON/Prohibited/Timer Heating/Cooling ON/Prohibited/Timer Holiday Active/Non active

Set time

Main menu

DHW Normal/Eco

Edit

DHW max. temp. DHW max. temp. drop DHW max. operation time DHW mode restriction

Legionella Active/Non active

Edit

Hot water temp. Frequency Start time Max. operation time Duration of max. temp.

Heating/cooling mode Zone1

Heating room temp./Heating ow temp./

Heating compensation curve/Cooling

ow temp.

Zone2 Room temp./Flow temp. /

Compensation curve

Compensation curve preview Compensation curve edit Zone1

Curve parameters Adjustment

Zone2

Curve parameters Adjustment

Schedule timer menu

Heating Zone1 Schedule timer preview

Day select Time select

Time setting Temp. setting

Zone2 Schedule timer preview

Day select Time select

Time setting Temp. setting

Cooling Schedule timer preview

Day select Time select

Time setting

DHW Schedule timer preview

Day select

Time setting

DHW 2

Period Schedule timer preview

Day select

Time setting

Holiday mode

DHW active /non active Heating/Cooling active/non active Holiday menu Zone1

Heating room temp.

Heating ow temp. Cooling ow temp.

Zone2

Heating room temp.

Heating ow temp.

Initial settings

Date/Time yyyy/mm/dd/hh:mm Language ENG/FR/GER/SW/SP/IT/DA/NL/FIN/NOR/PT

°C/°F °C/°F

Temp. display OFF/Room/Tank/Room&Tank Contact number Time display hh:mm/hh:mm AM/AM hh:mm

Room sensor setting

Room RC zone select Room RC1-8

Zone1

Sensor setting TH1/Main controller/

Room RC1-8/ “Time/Zone”

Select Time/Zone

Time setting Sensor setting

Zone2 Sensor setting TH1/Main controller/

Room RC1-8/ “Time/Zone”

Select Time/Zone

Time setting Sensor setting

Unrestricted access Installer only Shaded items relate to DHW functions. These are only available if the system includes a DHW tank.

Page 40

(Password protected)

Unrestricted access Installer only Shaded items relate to DHW functions. These are only available if the system includes a DHW tank.

System Set Up

Initial

Main screen

Main menu Service

Manual operation Function settings Thermistor adjustment Auxiliary settings

Economy setting for pump

ON/OFF Delay

Electric heater (Heating)

ON/OFF Delay

Electric heater (DHW)

ON/OFF Delay

Mixing valve control Running

Interval

Pump speed

Heat source setting Standard (Heat pump & electric heater)/Heater (Electric heater only)/Boiler/Hybrid (Heat pump

& heater/Boiler)

Operation settings Freeze stat function Flow t.

Outdoor ambient temp.

Simultaneous operation ON/OFF

Outdoor ambient temp.

Cold weather function ON/OFF

Outdoor ambient temp.

Room temp. control (Heating)

Temp. control interval Flow temp. range Min. temp.

Max. temp.

H/P thermo diff. adjust ON/OFF

Lower limit

Upper limit Boiler settings Hybrid settings Outdoor ambient temp. *2 Priority Ambient/Cost /CO2

Intelligent settings Energy price Electricity

Boiler Schedule CO2 emission

Electricity

Boiler Heat source

Heat pump capacity

Boiler efciency

Booster heater 1

capacity

Booster heater 2

capacity

Floor dry up function ON/OFF (For more details, refer to

Page 50.)

Target temp. Start & Finish

Max. temp. Max. temp. period

Flow temp. (Increase) Temp. increase step

Increase interval

Flow temp. (Decrease) Temp. decrease step

Decrease interval

External input settings Demand control OFF (Heat source)/Boiler

Running information Outdoor thermostat Heater/Boiler Thermistor reading Summary of settings Error history Password protection Manual reset

Main controller

Yes/No

FTC Yes/No

SD card SD Main RC Select download data

Main RC SD Select upload data

Continued from the previous page.

*2 For more details, refer to the installation manual of PAC-TH011HT-E.

Page 41

System Set Up

Setting the Main Controller

After the power has been connected to the outdoor unit and hydrobox (See chapter 4.5) the initial system settings can be entered via the main controller.

1. Check all breakers and other safety devices are correctly installed and turn on power to the system.

2. When the main controller switched on for the rst time, the screen automati

cally goes to Initial settings menu, Language setting screen and Date/Time setting screen in order.

3. Main controller will automatically start up. Wait approximately 6 mins whilst the control menus load.

4. When the controller is ready a blank screen with a line running across the top will be displayed.

5. Press button E (Power) (refer to page 34) to turn on the system. Before turning

on the system, perform initial settings as instructed below.

Icon Description

Hot water (DHW)

Heating/Cooling

Schedule timer

Holiday mode

Initial settings

Service

Initial Settings

From the Initial settings menu the installer can set the following.

• Date/Time

• Language

• ºC/ºF

• Temp. display

• Contact number

• Time display

• Room sensor settings

1. Use buttons F1 and F2 to move scroll through the menu list. When the title is

highlighted press CONFIRM to edit.

2. Use function buttons appropriate to edit each setting then press CONFIRM to

save the setting.

Main Settings Menu

The main settings menu can be accessed by pressing the MENU button. To reduce the risk of untrained end users altering the settings accidentally there are two access levels to the main settings; and the service section menu is password protected.

User Level – Short press

If the MENU button is pressed once for a short time the main settings will be displayed but without the edit function. This will enable the user to view current settings but NOT change the parameters.

Installer Level – Long press

If the MENU button is pressed down for 3 secs the main settings will be displayed with all functionality available.

The following items can be viewed and/or edited (dependent on access level).

• Domestic Hot water (DHW)

• Heating/Cooling

• Schedule timer

• Holiday mode

• Initial settings

• Service (Password protected)

Use the F2 and F3 buttons to move between the icons. The highlighted icon will

appear as a larger version in the centre of the screen. Press CONFIRM to select

and edit the highlighted mode.

For room sensor settings it is important to choose the correct room sensor depending on the heating mode the system will operate in.

1. From the Initial settings menu select Room sensor settings.

Page 42

System Set Up

Domestic Hot Water (DHW)/Legionella Prevention

The domestic hot water and legionella prevention menus control the operation of DHW tank heat ups.

1. Highlight the hot water icon and press CONFIRM.

2. Use button F1 to switch between Normal and ECO heating modes.

3. To edit the mode press F2 to display the HOT WATER (DHW) SETTING menu.

4. Use F2 and F3 keys to scroll through the menu selecting each component in

turn by pressing CONFIRM. See the table below for description of each setting.

5. Enter the desired number using the function keys and press CONFIRM.

Menu subtitle Function Range Unit

Default value

DHW max. temp Desired temperature of stored hot water 40 - 60 °C 50 DHW max. temperature drop

Difference in temperature between DHW max. temp and the temperature at which DHW mode restarts

5 - 30 °C 10

DHW max. operation time

Max time allowed for stored water heating DHW mode 30 - 120 min 60

DHW mode restriction The time period after DHW mode when space heating has priority over DHW mode temporarily pre-

venting further stored water heating

(Only when DHW max. operation time has passed.)

30 - 120 min 30

2. When 2-zone temperature control is active or wireless remote controllers are

available, from Room RC zone select screen, select zone no. to assign to

each remote controller.

3. From Sensor setting screen, select a room sensor to be used for monitoring the room temperature from Zone1 and Zone2 separately.

Control option

(pages 33 and 34)

Corresponding initial settings room sensor

Zone1

Zone2

A Room RC1-8 (one each

for Zone1 and Zone2)

B TH1 * C Main controller * D * *

* Not specied ( if a eld-supplied room thermostat is used)

Room RC1-8 (one each for Zone1 and Zone2) (if a wireless remote controller

is used as a room thermostat)

4. From Sensor setting screen, select Time/Zone to make it possible to use differ

ent room sensors according to the time schedule set in the Select Time/Zone menu. The room sensors can be switched up to 4 times within 24 hours .

Time/Zone schedule setting screen

Page 43

DHW tank temp.

Stop

Restart

Stop

Time

Start

Stop temp.

Legionella hot water temp.

LP mode LP mode

Restart temp.

Space heating/ cooling

Duration of Max. temp.

Mode

nish

(LP mode: Legionella Prevention mode)

DHW tank temp.

DHW max. temp.

DHW max. temp. drop

Start

DHW max. operation time

DHW mode restriction

DHW mode

Time

Stop

Restart

DHW max. temp.

DHW max. temp. drop

DHW tank temp.

Stop

Start

Restart

Time

DHW mode DHW mode

System Set Up

Please note that LP mode uses the assistance of electric heaters (if present)

to supplement the energy input of the heat pump. Heating water for long

periods of time is not efcient and will increase running costs. The installer

should give careful consideration to the necessity of legionella prevention treatment whilst not wasting energy by heating the stored water for excessive time periods. The end user should understand the importance of this feature.

ALWAYS COMPLY WITH LOCAL AND NATIONAL GUIDANCE FOR YOUR COUNTRY REGARDING LEGIONELLA PREVENTION.

Explanation of DHW operation

• When the DHW tank temperature drops from “DHW max. temp” by more than the “DHW max. temperature drop” (set by installer), DHW mode operates and the ow from the primary heating/cooling circuit is diverted to heat the water in

the DHW tank.

• When the temperature of the stored water reaches the ‘DHW max. temp.’ set by the installer or if the ‘DHW max. operation time’ set by the installer is exceeded DHW mode ceases to operate.

• Whilst DHW mode is in operation primary hot water is not directed to the space heating/cooling circuit.

• Directly after DHW max. operation time ‘DHW mode restriction’ will routinely operate. The duration of this feature is set by the installer and during its opera-

tion DHW mode can not (normally) be reactivated, allowing time for the system

to deliver primary hot water to the space heating/cooling if required. However, if at this time there is no current demand for space heating/cooling, the system will automatically resume DHW mode. This will continue until it receives a demand for space heating/cooling.

• After the ‘DHW mode restriction’ operation the DHW mode can operate again and DHW tank heating will continue according to system demand.

DHW mode can run in either ‘Normal’ or ‘Eco’ mode. Normal mode will heat the water in the DHW tank more quickly using the full power of the heat pump. Eco mode takes a little longer to heat the water in the DHW tank but the energy used is reduced. This is because heat pump operation is restricted using signals from the FTC4 based on measured DHW tank temperature.

Note: The actual energy saved in Eco mode will vary according to outdoor

ambient temperature.

Return to the DHW/legionella prevention menu.

Legionella Prevention Mode settings (LP mode)

1. Use button F3 to choose legionella mode active YES/NO.

2. Use button F4 to edit the legionella function.

3. Use F1 and F2 keys to scroll through the menu selecting each subtitle in turn

by pressing CONFIRM. See the table below for description of each setting.

4. Enter the desired number using the function keys and press CONFIRM.

During Legionella Prevention Mode the temperature of the stored water is increased above 60°C to inhibit legionella bacterium growth. It is strongly recommended that this is done at regular intervals. Please check local regulations for the recommended frequency of heat ups.

Note: When failures occur on the hydrobox, the LP mode may not function

normally.

Menu subtitle Function Range Unit Default value

Hot water temp. Desired temp of stored hot water 60–70 °C 65 Frequency Time between LP mode DHW tank heat ups 1–30 day 15 Start time Time when LP mode will begin 0:00–23:00 - 03:00 Max. operation time Maximum time allowed for LP mode DHW tank heat 1–5 hour 3 Duration of max. temp. The time period after LP mode max. water temp has been reached 1–120 min 30

Explanation of Legionella Prevention Mode operation

• At the time entered by the installer ‘Start time’ ow of useful heat from the sys

tem is diverted to heat the water in the DHW tank.

• When the temperature of the stored water exceeds the ‘Hot Water temp.’ set by

the installer (above 65°C) primary circuit water is no longer diverted to heat the

DHW tank.

• Whilst LP mode is in operation hot water is not directed to the space heating /cooling circuit.

• Directly after LP mode operation ‘Duration of max. temp’ will operate. The dura

tion of this feature is set by the installer and during its operation stored water temperature will be monitored.

• If stored water temperature should drop to LP restart temp, LP mode will restart

and primary water flow from the heat source(s) will be directed to the DHW

tank to boost the temperature. Once the set time for Duration of Max. temp has

passed LP mode will not recur for the set interval (set by installer).

• It is the responsibility of the installer to ensure the settings for legionella preven

tion are compliant with local and national guidelines.

Page 44

System Set Up

Heating/Cooling

The heating and cooling menus deal with space heating and cooling typically us-

ing either a radiator or underoor system depending on the installation.

From the main settings menu

1. Use F2 and F3 buttons to highlight heating/cooling icon then press CON

FIRM.

2. The heating and cooling menu will be displayed.

3. To select the sub-menus press the function button below the icon required. E.g. for mode change of Zone1 press F1

Heating/Cooling

1. Under this sub-menu the mode of heating or cooling is selected.

2. Choose between

• Heating ow temperature ( )

• Heating room temperature ( )

• Heating compensation curve ( )

• Cooling ow temperature ( )

Heating room temperature cannot be selected both in Zone1 and Zone2. When Cooling ow temp. is selected in Zone1, Cooling ow temp is automatically selected in Zone2. Zone1 and Zone2 are controlled at the same

set temperature. If using an underoor system in Cooling mode, do not set the ow temperature too low to avoid formation of condensation.

3. To choose between the different modes for heating and cooling, highlight the mode preferred and press select.

If compensation curve mode was selected as the heating mode please read the following instructions.

Forced DHW

The forced DHW function is used to force the system to operate in DHW mode. In normal operation the water in the DHW tank will be heated either to the set tem-

perature or for the maximum DHW time, whichever occurs rst. However should

there be a high demand for hot water ‘Forced DHW’ function can be used to prevent the system from routinely switching to space heating/cooling and continue to provide DHW tank heating. Forced DHW operation is activated by pressing button F1 and Back button in the ‘Option Screen’. After DHW operation nishes, the system will automatically return to normal operation. To cancel forced DHW operation hold down button F1 in the ‘Option Screen’.

Explanation of compensation curve

During late spring and summer usually the demand for space heating is reduced.

To prevent the heat pump from producing excessive ow temperatures for the primary circuit the compensation curve mode can be used to maximise efciency

and reduce running costs.

The compensation curve is used to restrict the ow temperature of the primary

space heating circuit dependent on the outdoor ambient temperature. The FTC4 uses information from both an outdoor ambient temperature sensor and a temperature sensor on the primary circuit supply to ensure the heat pump is not pro-

ducing excessive ow temperatures if the weather conditions do not require it.

*This setting cannot be performed in cooling mode.

1. From the heating menu select edit using the F3 function button.

2. The compensation curve setting screen will be displayed.

3. In 2-zone heating operation, press F1 to switch between Zone1 and Zone2.

4. Press F2 to alter the Hi parameter (when ow temp is maximum and out

door ambient temp is minimum).

5. Press F3 to alter the Lo parameter (when ow temp is minimum and out

door ambient temp is maximum).

6. Press F4 to add an extra point (adjust).

Pressing F2-4 will cause the relevant edit screen to be displayed. Editing Lo and Hi parameters is done in the same way; please see the following for more detailed explanation of parameter editing.

In the parameter (Lo/Hi) edit screen the ow temperature and outdoor ambient

temperature for the compensation curve graph can be set and altered for the 2 extremes of Hi and Lo.

1. Press F1 and F2 to change the ow temperature (y-axis of compensation curve).

2. Pressing F1 will raise the desired ow temperature for the set outdoor ambi

ent temperature.

3. Pressing F2 will lower the desired ow temperature for the set outdoor am

bient temperature.

4. Press F3 and F4 to change the outdoor ambient temperature (x-axis of compensation curve).

5. Pressing F3 will lower the outdoor ambient temperature for the set ow tem

perature.

6. Pressing F4 will raise the outdoor ambient temperature for the set ow tem

perature.

Page 45

Mode select screen

Mode select screen when PUHZ-FRP connected

Period setting screen when PUHZ-FRP connected

System Set Up

Schedule timer

The schedule timer mode allows daily and weekly space heating/cooling and DHW patterns to be entered.

1. From the main settings menu use F2 and F3 to highlight the schedule timer

icon then press CONFIRM.

2. The schedule timer sub menu will be displayed. The icons show the following modes;

• Heating

• Cooling

• Hot Water (DHW)

3. Use F2 and F3 buttons to move between mode icons then press CONFIRM to

be shown the preview screen for each mode.

The preview screen allows you to view the current settings. In 2-zone heating operation, press F1 to switch between Zone1 and Zone2. Days of the week are displayed across the top of the screen. Where day appears underlined the settings are the same for all those days underlined. Hours of the day and night are represented as a bar across the main part of the

screen. Where the bar is solid black, space heating/DHW (whichever is selected)

is allowed.

When a PUHZ-FRP outdoor unit is connected, DHW schedule timer setting can

be set for two periods into which a year is divided. In this menu screen, the duration of Period 2 can be entered. The rest of the set duration comes set as Period 1.

1. From the main settings menu use F2 and F3 to highlight the schedule timer

icon then press CONFIRM.

The schedule timer sub menu will be displayed. The icons show the following modes;

• Heating

• Hot Water (DHW)

• Hot Water (DHW) 2

Use F2 and F3 buttons to move between mode icons to select the Hot Water

(DHW) 2 icon.

Use F1 to F4 buttons to select start and end months that apply to Period 2.

Press CONFIRM to be shown the preview screen for each mode.

Holiday mode

Holiday mode can be activated in 2 ways. Both methods will result in the Holiday Mode activation screen being shown.

Option 1.

From the main menu screen button E should be pressed. Be careful not to hold down button E for too long as this will turn off the controller and system.

Option 2.

From the main menu screen press button F4. The current settings screen will be displayed. Press button F4 again to access the holiday mode activation screen.

Once the holiday mode activation screen is displayed you can activate/deactivate and select the duration that you would like holiday mode to run for.

Press button F1 to activate or deactivate holiday mode. Use buttons F2, F3 and F4 to input the date which you would like holiday mode to activate or deactivate for space heating/cooling.

To change the Holiday mode settings e.g. the ow temp, you must access the

holiday mode menu from the main settings menu.

From main menu screen press button B. Use buttons F2 and F3 to scroll through menu until Holiday Mode is highlighted.

Press CONFIRM button.

The holiday mode status screen is displayed.

To change the ow temperature or room temperatures on heating mode press

button F3. A list of variables will be displayed. Choose the one you wish to modify using

buttons F1/F2 then press CONFIRM. Adjust the temperature using buttons F3 and F2 and press CONFIRM button

to save changes.

•

Holiday Mode activation screen

Holiday Mode status screen

Page 46

Preview screen

Day of week select screen

Time of period setting screen 1

Time of period setting screen 2

System Set Up

1. In the preview menu screen press F4 button.

2. First select the days of the week you wish to schedule.

3. Press F2/F3 buttons to move between days and F1 to check or uncheck the box.

4. When you have selected the days press CONFIRM.

5. The time bar edit screen will be displayed.

6. Use buttons F2/F3 to move to the point at which you do not want the selected

mode to be active press CONFIRM to start.

7. Use F3 button to set the required time of inactivity then press CONFIRM.

8. You can add up to 4 periods of inactivity within a 24 hour interval.

9. Press F4 to save settings.

When scheduling heating, button F1 changes the scheduled variable between time and temperature. This enables a lower temperature to be set for a number of hours e.g. a lower temperature may be required at night when the occupants are sleeping.

Note:

• The schedule timer for space heating/cooling and DHW are set in the same way. However for Cooling and DHW only time can be used as scheduling variable.

• A small rubbish bin character is also displayed choosing this icon will delete the last unsaved action.

• It is necessary to use the SAVE function F4 button to save settings. CON

FIRM does NOT act as SAVE for this menu.

Page 47

System Set Up

Service Menu

The service menu provides functions for use by installer or service engineer. It is NOT intended the home owner alters settings within this menu. It is for this reason password protection is required to prevent unauthorised access to the service settings.

From the main setting menu use F2 and F3 to highlight the service icon then

press CONFIRM.

You will be prompted to enter a password.

THE FACTORY DEFAULT

PASSWORD IS “0000”.

Press CONFIRM.

(It takes approx. 30 secs to load the service menu.)

The service menu is navigated using the F1 and F2 buttons to scroll through the functions. The menu is split across two screens and is comprised of the following functions;

Manual operation Function settings Thermistor adjustment Auxiliary settings Heat source setting Operation settings External input settings

Running information

Thermistor reading Summary of settings Error history Password protection Manual reset SD card

In this Installation Manual, instructions will be given only for the following functions;

Manual operation Auxiliary settings Heat source setting Operation settings External input settings Password protection Manual reset SD card

Information on the other functions can be found by consulting the service manual.

10.

11.

12.

13.

14.

Screen 1 of service menu

Screen 2 of service menu

System off prompt screen

Note: Many functions can not be set whilst the indoor unit is running. The

installer should turn OFF the unit before trying to set these functions. If the installer attempts to change the settings whilst the unit is running the main controller will display a reminder message prompting the installer to stop operation before continuing. By

selecting “Yes” the unit will cease operation.

Page 48

System Set Up

Auxiliary settings

This function is used to set the parameters for any auxiliary parts used in the system.

From the service menu use F1 and F2 buttons to highlight Auxiliary settings then

press CONFIRM.

Auxiliary settings menu screen

Electric heater (Heating) screen

Economy settings for pump screen

Electric heater (DHW) screen

From the Auxiliary settings menu highlight Electric heater (heating). Press CONFIRM. The Electric heater (heating) screen is displayed.

Press F1 button to switch the function ON/OFF. Use F3 and F4 buttons to adjust the time period of heat pump only operation

before the booster heater will assist in space heating. (5 -180mins)

From the Auxiliary settings menu highlight Economy Settings for water circulation pump.

Press CONFIRM.

The economy settings for water circulation pump screen is displayed. Use button F1 to switch the water circulation pump ON/OFF. Use buttons F3 and F4 to adjust the time the water circulation pump will run.

(3 - 60 mins)

Manual operation

During the lling of the system the water circulation pump and 3-way valve can

be manually overridden using manual operation mode. When manual operation is selected a small timer icon appears in the screen. The function selected will only remain in manual operation for a maximum of 2 hours. This is to prevent accidental permanent override of the FTC4.

From the service menu use F1 and F2 buttons to scroll through list until Manual Operation is highlighted.

Press CONFIRM.

Manual operation menu screen is displayed. To activate manual operation press the function button under the desired part.

►Example

Pressing F3 button will switch manual operation mode ON for the main 3-way

valve. When lling of the DHW tank is complete the installer should access this

menu again and press F3 to deactivate manual operation of the part. Alternatively after 2 hours manual operation mode will no longer be active and FTC4 will resume control of the part.

NOTE: Manual operation and heat source setting can not be selected if the

system is running. A screen will be displayed asking the installer to stop the system before these modes can be activated. The system automatically stops 2 hours after last operation.

Manual operation menu screen

System off prompt screen

From the Auxiliary settings menu highlight Electric heater (DHW). Press CONFIRM. The Electric heater (DHW) screen is displayed.

Press F1 button to switch the function ON/OFF. Use F3 and F4 buttons to adjust the time period of heat pump only operation

before the booster heater and the immersion heater (if present) will assist in DHW heating. (15 -30mins)

Being selected

Being running

Error indication

Page 49

System Set Up

Heat source setting screen

Cancel last action screen

From the Auxiliary settings menu highlight Mixing valve control. Press CONFIRM. The Mixing valve control screen is displayed. Use F1 and F2 buttons to set Running time between 30 to 240 seconds. The Running time equals to a period from full open of the valve (at a hot water mixing ratio of 100%) to full close (at a cold water mixing ratio of 100%).

Note: Set the Running time according to the specifications of the actuator

of each mixing valve.

From the Auxiliary settings menu highlight Mixing valve control. Press CONFIRM. The Mixing valve control screen is displayed. Press F3 and F4 buttons to set the interval between 2-zone temperature controls of the mixing valve between 1 to 30 mins.

Note: It is recommended to set the interval to 2 minutes that is a default

value. With the interval set longer, it could take longer to warm up a room.

Mixing valve setting screen

Pump speed setting screen

From the Auxiliary settings menu highlight water circulation pump speed. Press CONFIRM. Press F3 and F4 buttons to select a refrigerant address of which you wish to

congure or check the settings.

Press CONFIRM. The Pump speed screen is displayed. Use F2 and F3 buttons to set the pump speed of the water circulation pump between 1 to 5.

Heat source setting

The default heat source setting is heat pump and all electric heaters present in the system to be operational. This is referred to as Standard operation on the menu.

From the service menu use F1 and F2 buttons to scroll through list until

is highlighted. Press CONFIRM. Heat source setting menu screen is displayed. Press F3 button until preferred heat source is displayed. Press CONFIRM.

If you wish to return to the service menu without saving the setting press return

button. You will be asked if you are sure you wish to cancel the changes.

Choose Yes or No as appropriate.

Page 50

System Set Up

Operation settings

To access the Operation settings menu use F1 and F2 buttons to scroll through the service menu until Operation settings is highlighted.

Press CONFIRM.

Operation settings menu is displayed.

From the Auxiliary settings menu highlight Freeze Stat Function.

Press CONFIRM.

The freeze stat function screen will be displayed. Use buttons F3 and F4 to adjust the minimum outdoor ambient temperature

which freeze stat function will begin to operate, (3 - 20 °C) or choose .

If asterisk (

) is chosen freeze stat function is deactivated. (i.e. primary water

freeze risk)

Note: When the system is turned off, freeze stat function is not enabled.

Operation settings menu screen

Simultaneous operation screen

Cold weather function screen

Freeze stat function screen

For periods of very low outside temperature this mode can be used. Simultaneous operation allows both DHW and space heating to run together by using the heat pump and/or booster heater to provide space heating whilst only the immersion heater provides heating for DHW. This operation is only available if BOTH a DHW tank AND immersion heater are present on the system.

From the Operation settings menu use F1 and F2 buttons to scroll through the list until Simultaneous operation is highlighted.

Press CONFIRM.

Simultaneous operation screen is displayed. To switch simultaneous operation ON/OFF press F1. To alter the temperature at which simultaneous operation starts use F3 and F4.

Note:

Range of outdoor ambient temperature is −15°C to 10°C (default −15°C).

System shall automatically return to routine operation. This will happen when the outdoor ambient temp rises above the selected temp for this

specic mode of operation.

•

For extremely low outdoor ambient temperature conditions when the heat pump’s capacity is restricted the heating or DHW is provided only by the electric booster

heater (and immersion if present). This function is intended for use during

extreme cold periods only. Extensive use of direct electrical heaters ONLY will result in higher electric usage and may reduce working life of heaters and related parts.

From the Operation settings menu use F1 and F2 buttons to scroll through the list until Cold weather function is highlighted.

Press CONFIRM.

Cold weather function screen is displayed. To switch Cold weather function ON/OFF press F1. To alter the temperature at which heater switching function starts use F3 and F4.

Note:

Range of outdoor ambient temperature is −15°C to −10°C (default −15°C).

System shall automatically return to routine operation. This will happen when the outdoor ambient temp rises above the selected temp for this

specic mode of operation.

•

Page 51

System Set Up

This function allows operational setting of ow temperature range from the Ecodan and also the time interval at which the FTC4 collects and processes data for the auto adaptation mode.

From the Operation settings menu use F1 and F2 buttons to scroll through the list until Room temp. control (HEATING) is highlighted. Press CONFIRM.

3. Use F1 and F2 keys to scroll through the menu selecting each subtitle in turn by pressing CONFIRM. See the table below for description of each setting.

4. Enter the desired number using the function keys and press CONFIRM.

Room temp. control (HEATING) screen

Menu subtitle Function Range Unit Default Temp. control interval Selectable according to the heat emitter type and the mate-

rials of oor (i.e. radiators, oor heating-thick, -thin concrete, wood, etc.)

10 - 60 mins. 10

Flow temperature range Minimum temp. To minimize the loss by frequent ON and OFF in mild out-

door ambient temp. seasons.

25 - 45 ºC 30

Maximum temp. To set max. possible ow temp according to the type of heat

emitters.

35 - 60 ºC 50

Heat pump thermo diff.adjust On/Off To minimize the loss by frequent ON and OFF in mild out-

door ambient temp. seasons.

On/Off — On

Lower limit Prohibits heat pump operation until the flow temperature

drops below the target ow temperature minus lower limit value.

−9 - −1 ºC −5

Upper limit Allows heat pump operation until the ow temperature rises

above the target ow temperature plus upper limit value.

+3 - +5 ºC +5

*1 The minimum ow temperature that prohibits heat pump operation is 20ºC. *2 The maximum ow temperature that allows heat pump operation equals to the maximum temperature set in the ow temp. range menu.

The Floor dry up function automatically changes the target hot water temperature in stages to gradually dry concrete when this particular type of underoor heating system is installed.

1. Turn off the system using the main controller.

2. From the Operation settings in the service menu, use F1 and F2 buttons to scroll through the list until Floor dry up function is highlighted.

3. Press CONFIRM to display the FLOOR DRY UP screen.

4. To change settings, press F4. For details on settings, refer to the table below.

5. To start the Floor dry up operation, press F1 button to check a box below “Active” and press CONFIRM

*1. Upon completion of the operation the system stops all the operations except

the Freeze stat. operation.

*2. For Floor dry up function, the target ow temp. of Zone1 is the same as that of

Zone2.

Note:

This function is not available when a PUHZ-FRP outdoor unit is connect

ed. Disconnect wiring to signal inputs of room thermostat, demand control,

and outdoor thermostat, or the target ow temp. may not be maintained.

•

Functions Symbol Description Option/Range Unit Default

Floor dry up function a

Set the function to ON and power on the system using the main controller, and the dry up heating operation will start.

On/Off - Off

Flow temp. (increase)

Flow temp. increase step b Sets the increase step of the target ow temp. +1 - +10 ºC +5 Increase interval c Sets the period for which the same target ow temp is maintained. 1 - 7 day 2

Flow temp. (decrease)

Flow temp. decrease step d Sets the decrease step of the target ow temp. −1 - −10 ºC −5 Decrease interval e Sets the period for which the same target ow temp is maintained. 1 - 7 day 2

Target temperature

Start & Finish f Sets the target ow temp. at the start and the nish of the operation. 25 - 60 ºC 30 Max. target temp. g Sets the maximum target ow temp. 25 - 60 ºC 45 Max. temp. period h Sets the period for which the maximum target ow temp. is maintained. 1 - 20 day 5

0 1 2 3 4 5 6 7 8 9 1011 12 13 1415 16 17 18

(°C )

(b)

(d)

(h)

(c)

(f)

(e)

(g)

Days

Target ow temp.

Page 52

System Set Up

External input settings menu screen

Demand control screen

Outdoor thermostat setting screen

External input settings

From the service menu use F1 and F2 buttons to highlight External input settings

then press CONFIRM.

From the External input settings menu highlight Demand control (IN4). Press CONFIRM.

The Demand control screen is displayed.

Press F3 button to select Heat source OFF or Boiler.

Press CONFIRM.

Note: The selection of “OFF”, whilst a signal is being sent to IN4, forcefully

stops all the heat source operations and the selection of “Boiler” stops operations of heat pump and electric heater and performs boiler operation.

From the External input settings menu highlight Outdoor thermostat (IN5). Press CONFIRM.

The Outdoor thermostat screen is displayed. Press F3 button to select Heater or Boiler.

Press CONFIRM.

Note: The selection of “Heater”, whilst a signal is being sent to IN5, performs

electric-heater-only operation and the selection of “Boiler” performs boiler operation.

Password protection

Password protection is available to prevent unauthorised access to the service menu by untrained persons.

From the service menu use F1 and F2 buttons to scroll through list until

ass

ect

is highlighted.

Press CONFIRM.

When password input screen is displayed use buttons F1 and F2 to move left and right between the four digits, F3 to lower the selected digit by 1, and F4 to increase the selected digit by 1.

When you have input your password press CONFIRM.

The password verify screen is displayed. To verify your new password press button F3. Your password is now set and the completion screen is displayed.

If you forget the password you entered, or have to service a unit somebody else installed, you can reset the password to the factory default of 0000.

From the main settings menu scroll down the functions until Service Menu is highlighted.

Press CONFIRM.

You will be prompted to enter a password. Hold down buttons F3 and F4 together for 3 secs You will be asked if you wish to continue and reset the password to default set

ting. To reset press button F3. The password is now reset to 0000.

Password input screen

Password verify screen

Completion screen

Page 53

System Set Up

Manual reset

Should you wish to restore the factory settings at any time you should use the manual reset function. Please note this will reset ALL functions to the factory default settings.

From the service menu use F1 and F2 buttons to scroll through list until Manual Reset is highlighted. Press CONFIRM. The Manual reset screen is displayed. Choose either Manual Reset for FTC4 or Main Controller.

Press F3 button to conrm manual reset of chosen device.5.

SD card

The use of an SD memory card simplies the main controller settings in the eld.

*Ecodan service tool (for use with PC tool) is necessary for the setting.

From the SD card setting use F1 and F2 buttons to scroll through list until “SD Main RC” is highlighted. Press CONFIRM. Use F1, F2 and F3 buttons to select a menu to write to the main controller. Press CONFIRM to start downloading. Wait for a few minutes until “Complete!” appears.

From the SD card setting use F1 and F2 buttons to scroll through list until “Main RC SD” is highlighted. Press CONFIRM. Use F1, F2 and F3 buttons to select a menu to write to the SD memory card. Press CONFIRM to start uploading. Wait for a few minutes until “Complete!” appears.

Page 54

Commissioning

Pre-commissioning Checklist

Before commissioning the hydrobox system complete the following table to ensure the necessary checks are carried out.

No System commissioning checklist Notes

1 Installation location Air ow around the unit Outdoor unit Good/Poor

Maintenance access Hydrobox Good/Poor

Outdoor unit Good/Poor 3 Water Quality and System Preparation Water quantity in the primary circuit L 4 Pipework Total pipe length Outdoor to indoor m 5 Height difference Outdoor to indoor m 6 System chemically cleansed and

ushed

Yes/No

7 Insulation type and thickness 8 Electrical wiring Correct cables used 9 Electrical maintenance access Good/Poor

10 Connection of mains power source Outdoor unit electric cable

Type Size

Indoor unit electric cable

Type

Size 11 Connection of control cable 12

Anti-freeze Refer to product guidelines. (Also se section 4.2 Note.) %

Check pre-charge in the expansion vessel(s) Yes/No

14 Pressurise primary heating circuit to 1 bar

Yes/No

Release air from system Yes/No

Outdoor unit (PACKAGE type) operation checklist

Outdoor unit details Model No. Serial No.

Power source (V) 1ø L - N

3ø L1 - L2 L2 - L3 L3 - L1

Excessive vibration/noise

Compressor Yes/No Fan Yes/No

Unit mounted on anti-vibration pads (Tico Pads) Yes/No

20 Provision made for condensate removal Yes/No

For installation in hard water areas, see advice in section 4.2 General.

Notes/Comments:

6. Commissioning

Page 55

Service and Maintenance

The indoor hydrobox must be serviced once a year by a qualified individual. Servicing and maintenance of the outdoor unit should only be done by a Mitsubishi Electric trained technician with relevant qualifications and experience. Any electrical work should be done by a tradesperson with the appropriate electrical

qualications. Any maintenance or ‘DIY’ xes done by a non-accredited person

could invalidate the Warranty and/or result in damage to the hydrobox and injury to the person.

Basic Troubleshooting for Hydrobox

No. Fault symptom Possible cause Explanation - Solution

1 Main controller display

is blank.

There is no power supply to main controller.

Check LED2 on FTC4. (See <Figure 5.2.1>.) (i) When LED2 is lit.

Check for damage or contact failure of the main controller wiring.

(ii) When LED2 is blinking.

Refer to No. 5 below.

(iii) When LED2 is not lit.

Refer to No. 4 below.

2. Power is supplied to main controller, however, the display on the main controller does not appear.

2. Check the following:

• Disconnection between the main controller cable and the FTC4 control board

• Failure of the main controller if “Please Wait” is not displayed.

• Refer to No. 2 below if “Please Wait” is displayed.

2 “Please Wait” remains

displayed on the main controller.

"Please Wait" is displayed for up to 6

minutes.

Normal operation.

2. Communication failure between the main controller and FTC4.

2, 3.

Main controller start up checks/procedure.

(i) I f “0 %” or “5 0-9 9 % ” is disp lay e d below "P lea s e Wai t" th e r e is a

communication error between the main controller and the FTC4 control board.

• Check wiring connections on the main controller.

• Replace the main controller or the FTC4 control board.

(ii) If “1-49%” is displayed there is a communication error between the outdoor

unit's and FTC4's control boards.

• Check the wiring connections on the outdoor unit control board and the FTC4 control board.

(Ensure S1 and S2 are not cross-wired and S3 is securely wired with no damage. (See section 4.5.)

• Replace the outdoor unit's and/or the FTC4's control boards.

3. Communication failure between FTC4 and outdoor unit.

3 The main screen

appears with a press

of the “ON” button, but

disappears in a second.

The main controller operations do not work for a whilst after the settings are changed in the service menu. This is because the system takes time to apply the changes.

Normal operation. The indoor unit is applying updated settings made in the service menu. Normal operation will start shortly.

4 LED2 on FTC4 is off.

(See <Figure 5.2.1>.)

When LED1 on FTC4 is also off. (See <Figure

5.2.1>.) <FTC4 powered via outdoor unit.>

The outdoor unit is not supplied at the rated voltage.

Check the voltage across the terminals L and N or L3 and N on the outdoor

power board. (See section 4.5.)

• When the voltage is not 220 to 240V AC, check wiring of the outdoor unit and

of the breaker.

• When the voltage is at 220 to 240V AC, go to “2.” below.

2. Defective outdoor controller circuit board. 2. Check the voltage across the outdoor unit terminals S1 and S2. (See section

4.5.)

• When the voltage is not 220 to 240V AC, check the fuse on the outdoor

control board and check for faulty wiring.

• When the voltage is 220 to 240V AC, go to “3.” below.

3. FTC4 is not supplied with 220 to 240V AC.

3. Check the voltage across the indoor unit terminals S1 and S2. (See section 4.5.)

• When the voltage is not 220 to 240V AC, check FTC4-outdoor unit wiring for

faults.

• When the voltage is 220 to 240V AC, go to “4.” below.

4. FTC4 failure. 4. Check the FTC4 control board.

• Check the fuse on FTC4 control board.

• Check for faulty wiring.

• If no problem found with the wiring, the FTC4 control board is faulty.

5. Faulty connector wiring. 5. Check the connector wiring.

• When the connectors are wired incorrectly, re-wire the connectors referring to

below. (See section 4.5.)

CN01

Service and Maintenance

FTC4 powered via outdoor unit

Black

Hydrobox control board

BLACK

YELLOW

BLACK

7. Service and Maintenance

Page 56

Service and Maintenance

No. Fault symptom Possible cause Explanation - Solution

4. LED2 on FTC4 is off.

(See Figure <5.2.1>)

FTC4 is not supplied with 220 to 240V AC. 1. Check the voltage across the L and N terminals on the indoor power supply

terminal block. (See section 4.5.)

• When the voltage is not 220 to 240V AC, check for faulty wiring to power

supply.

• When the voltage is 220 to 240V AC, go to 2. below.

2. There are problems in the method of connecting the connectors.

2. Check for faulty wiring between the connectors.

• When the connectors are wired incorrectly re-wire them correctly referring to

below. (See section 4.5 and a wiring diagram on the control and electrical box cover.)

CN01

• If no problem found with the wiring, go to 3. below.

3. FTC4 failure. 3. Check the FTC4 control board.

• Check the fuse on FTC4 control board.

• Check for faulty wiring.

• If no problem found with the wiring, the FTC4 control board is faulty.

When LED1 on FTC4 is lit.

Recheck the refrigerant address setting on the outdoor unit. Set the refrigerant address to “0”. (Set refrigerant address using SW1(3 - 6) on outdoor controller circuit board.)

Incorrect setting of refrigerant address for outdoor unit.

(None of the refrigerant address is set to "0".)

5 LED2 on FTC4 is

blinking.

(See Figure <5.2.1>)

When LED1 is also blinking on FTC4 .

Check for faulty wiring between FTC4 and outdoor unit. Faulty wiring between FTC4 and outdoor unit

When LED1 on FTC4 is lit.

Faulty wiring in main controller Multiple indoor units have been wired to a single outdoor unit.

Check for faulty wiring in main controller. The number of indoor units that can be wired to a single outdoor unit is one.

Ad-

ditional indoor units must be wired individually to a single outdoor unit.

2. Short-circuited wiring in main controller

2.,3.

Remove main controller wires and check LED2 on FTC4. (See Figure 5.2.1.)

• If LED2 is blinking check for short circuits in the main controller wiring .

• If LED2 is lit, wire the main controller again and:

- if LED2 is blinking, the main controller is faulty;

- if LED2 is lit, faulty wiring of the main controller has been corrected.

3. Main controller failure

6 LED4 on FTC4 is off.

(See gure <5.2.1>)

SD memory card is NOT inserted into the memory card slot with correct orientation.

Correctly insert SD memory card in place until a click is heard.

2. Not an SD standards compliant memory card. 2. Use an SD standards compliant memory card. (Refer to section 5.6.) LED4 on FTC4 is blinking.

(See Figure <5.2.1>)

Full of data. 1. Move or delete data, or replace SD memory card with a new one.

2. Write-protected. 2. Release the write-protect switch.

3. NOT formatted. 3. Refer to "5.6 Using SD memory card".

4. Formatted in NTFS le system. 4. FTC4 is Not compatible with NTFS le system. Use an SD memory card formatted

in FAT le system.

7 No water at hot tap. 1. Cold main off 1. Check and open stop cock.

2. Strainer (eld supply) blocked. 2. Isolate water supply and clean strainer.

8 Cold water at tap. 1. Hot water run out. 1. Ensure DHW mode is operating and wait for DHW tank to re-heat.

2. Prohibit, schedule timer or holiday mode se-

lected.

2. Check settings and change as appropriate.

3. Heat pump not working. 3. Check heat pump – consult outdoor unit service manual.

4. Booster heater cut-out trip

ped

. 4. Check booster heater thermostat and press reset button if safe.

Reset button is located on the side of booster heater, covered with white rubber cap. See component parts diagram (section 3.) to nd out its position.

The earth leakage circuit breaker for booster

heater breaker (ECB1) tripped.

5. Check the cause and reset if safe.

6. The boost er heat er the rma l cut -ou t has

tripped and cannot be reset using the manual reset button.

6. Check resistance across the thermal cut-out, if open then the connection is broken and the booster heater will have to be replaced. Contact your Mitsubishi Electric dealer.

7. Immersion heater cut-out tripped. 7. Check immersion heater thermostat and press reset button, located on immersion heater boss, if safe. If the heater has been operated with no water inside it may have failed, so please replace it with a new one.

Immersion heater breaker (ECB2) tripped.

8. Check the cause and reset if safe.

9. 3-way valve fault 9. Check plumbing/wiring to 3-way valve.

(i) Manually override 3-way valve using the main controller. (Refer to <Manual op

eration> in section 5.7.) If the valve does not still function, go to (ii) below. (ii) Replace 3-way valve coil. If the valve does not still function, go to (iii) below. (iii) Replace 3-way valve. (Refer to the service manual.)

Black

Hydrobox control board

YELLOW

BLACK

FTC4 powered from independent source

BLACK

Page 57

Service and Maintenance

No. Fault symptom Possible cause Explanation - Solution

9 Water heating takes

longer.

Heat pump not working. 1. Check heat pump – consult outdoor unit service manual.

2. Booster heater cut-out tripped. 2. Check booster heater thermostat and press reset button if safe.

Reset button is located on the side of booster heater, covered with white rubber cap. See component parts diagram (section 3.) to nd out its position.

Booster heater breaker (ECB1) tripped.

3. Check the cause and reset if safe.

4. The boost er heat er the rma l cut-ou t has tripped and cannot be reset using the manual reset button.

4. Check resistance across the thermal cut-out, if open then connection is broken and the booster heater will have to be replaced. Contact your Mitsubishi Electric dealer.

5. Immersion heater cut-out has been triggered. 5. Check immersion heater thermostat and press reset button located on immersion heater boss, if safe. If the heater kept running with no water inside, this may have resulted in failure, so replace it with a new one.

Immersion heater breaker (ECB2) tripped.

6. Check the cause and reset if safe.

10 Temperature of DHW

tank water dropped.

When DHW operation is not running, the DHW tank emits heat and the water temperature decreases to a certain level. If water in the DHW tank is reheated frequently because of a signicant drop in water temperature, check for the following.

Water leakage in the pipes that connect to the DHW tank

Take the following measures.

• Retighten the nuts holding the pipes onto the DHW tank.

• Replace seal materials.

• Replace the pipes.

2. Insulation material coming loose or off. 2. Fix insulation.

3. 3-way valve failure 3. Check plumbing/wiring to 3-way valve.

(i) Manually override 3-way valve using the main controller. (Refer to <Manual op

11 Hot or warm water

from cold tap.

Heat of hot water pipe is transferred to cold water pipe.

Insulate/re-route pipework.

Water leakage 1. Poorly sealed connections of water circuit

components

Tighten connections as required.

2. Water circuit components reaching the end of life

2. Refer to PARTS CATALOG in the service manual for expected part lifetimes and replace them as necessary.

Heating system does not reach the set temperature.

Prohibit, schedule timer or holiday mode selected.

Check settings and change as appropriate.

2. Check settings and change as appropriate. 2. Check the battery power and replace if at.

3. The temperature sensor is located in a room that has a different temperature relative to that of the rest of the house.

3. Relocate the temperature sensor to a more suitable room.

4. Heat pump not working. 4. Check heat pump – consult outdoor unit service manual.

5. Booster heater cut-out tripped. 5. Check booster heater thermostat and press reset button if safe.

Reset button is located on the side of booster heater, covered with white rubber cap. (See component parts diagram section 3. for position.)

Booster heater breaker (ECB1) tripped.

6. Check the cause of the trip and reset if safe.

7. The booster heater thermal cut-out tripped and can not be reset using the manual reset button.

Check resistance across the thermal cut-out, if open then the connection is broken and the booster heater will have to be replaced. Contact your Mitsubishi Electric dealer.

8. Incorrectly sized heat emitter. 8. Check the heat emitter surface area is adequate

Increase size if necessary.

9. 3-way valve failure 9. Check plumbing/wiring to 3-way valve.

10. Battery problem (*wireless control only) 10. Check the battery power and replace it at.

11.

If a mixing tank is installed, the ow rate between the mixing tank and the hydrobox is less than that between the mixing tank and the local system.

11.

Increase the ow rate between the mixing tank and the hydrobox decrease that

between the mixing tank and the local system.

Page 58

Service and Maintenance

No. Fault symptom Possible cause Explanation - Solution

In 2-zone temperature control, only Zone2 does not reach the set temperature.

1. When Zone1 and Zone2 are both in heating mode, the hot water temperature in Zone2 does not exceed that in Zone1.

Normal action no action necessary.

2. Faulty wiring of motorized mixing valve 2. Refer to "5.3 Wiring for 2-zone temperature control".

3. Faulty installation of motorized mixing valve 3. Check for correct installation. (Refer to the manual included with each motorized

mixing valve.)

4. Incorrect setting of Running time 4. Check for correct setting of Running time.

5. Motorized mixing valve failure 5. Inspect the mixing valve. (Refer to the manual included with each motorized mix-

ing valve.)

When a PUHZ-

FRP outdoor unit is

connected, DHW or Heating operation cannot run.

The outdoor unit is set to have operation of the indoor unit of air conditioner take precedence over that of the hydrobox, and in the main control-

ler settings "Electric heater (Heating)" or "Electric heater (DHW)" is turned off.

Turn ON Electric heater (Heating) or Electric heater (DHW) using the main controller.

When a PUHZ-FRP

outdoor unit is connected and is in heat recovery operation, the set temperature is not reached.

When the outdoor unit is set to have cooling operation of the indoor unit of air conditioner take precedence over that of the hydrobox, the outdoor unit controls the frequency of the compressor according to the load of air conditioner. The DHW and heating run according to that frequency.

Normal operation no action necessary. If Air-to-Water system is given priority in operation, comp Hz can be regulated de-

pending on the load of DHW or Heating. For more details, refer to the PUHZ-FRP

installation manual.

After DHW operation room temperature rises slightly.

At the end of the DHW mode operation the 3-way valve diverts hot water away from the DHW circuit into space heating circuit. This is done to prevent the hydrobox components from overheating. The amount of hot water directed into the space heating circuit varies according to the type of the system and of the pipe run between the plate heat exchanger and the hydrobox.

Normal operation no action necessary.

The room temperature rises during DHW operation.

3-way valve failure Check the 3-way valve.

Water discharges from pressure relief valve.

(Primary circuit)

If continual – pressure relief valve may be damaged.

Turn the handle on the pressure relief valve to check for foreign objects in it. If the problem is not still solved, replace the pressure relief valve with a new one.

2. If intermittent – expansion vessel charge may

have reduced/bladder perished.

2. Check pressure in expansion vessel.

Recharge to 1 bar if necessary.

If bladder perished replace expansion vessel with a new one.

20 Water discharges

from pressure relief

valve (eld supplied item). (Sanitary circuit)

If continual – field supplied pressure reducing valve not working.

Check function of pressure reducing valve and replace if necessary.

2. If continual – pressure relief valve seat may

be damaged.

2. Turn the handle on the pressure relief valve to check for foreign objects inside. If the problem is not still solved, replace the pressure relief valve.

3. If intermittent – expansion vessel charge may have reduced/bladder perished.

3. Check gas-side pressure in expansion vessel.

Recharge to correct precharge pressure if necessary.

If bladder perished replace expansion vessel with a new one with appropriate precharge.

4. DHW tank may have subjected to backow. 4. Check gas-side pressure in DHW tank. If pressure in DHW tank is similar to that in

incoming mains, cold water supply that merges with incoming mains water supply

could ow back to DHW tank. Investigate source of back-feed and rectify error in pipework/tting conguration. Adjust pressure in cold supply.

Noisy water circulation pump

Air in water circulation pump . Use manual and automatic air vents to remove air from system.

Top up water if necessary to achieve 1 bar on primary circuit.

22 Noise during hot

water draw off typically worse in the morning.

Loose airing cupboard pipework. 1. Install extra pipe fastening clips.

2. Heaters switching on/off. 2. Normal operation no action necessary.

23 Mechanical noise

heard coming from the hydrobox.

Heaters switching on/off. Normal operation no action necessary.

3-way valve changing position between DHW and heating mode.

24 Water circulation

pump runs for a short time unexpectedly .

Water circulation pump jam prevention mechanism

(routine) to inhibit the build-up of scale.

Normal operation no action necessary.

25 Milky/Cloudy water

(Sanitary circuit)

Oxygenated water Water from any pressurised system will release oxygen bubbles when water is run-

ning. The bubbles will settle out.

Heating mode has been on standby for

a long time (does

not start operation

smoothly.)

The time of “Delay” set in “Economy settings for pump” is too short. (Go to “Service menu” → “Auxiliary settings” → “Economy settings for pump”).

Increase the time of “Delay” in “Economy settings for pump” .

Page 59

Service and Maintenance

No. Fault symptom Possible cause Explanation - Solution

The hydrobox that was running in the heating mode before power failure is running in the DHW mode after power recovery.

The hydrobox is designed to run in an operation

mode with a higher priority (i.e. DHW mode in this case) at power recovery.

• Normal operation.

• After the DHW max. operation time has elapsed or the DHW max. temperature has

been reached, the DHW mode switches to the other mode (ex. Heating mode).

Cooling mode is NOT available.

Dip SW2-4 is OFF. Turn Dip SW2-4 to ON. (Refer to “5.1 Dip Switch Functions” in this manual.)

The cooling system does not cool down to the set temperature.

When the water in the circulation circuit is unduly hot, Cooling mode starts with a delay for the protection of the outdoor unit.

Normal operation.

2. When the outdoor temperature is lower than the prese t tem perat ure bel ow which the freeze stat. fu nction is acti vated, Cooling mode does not start running.

2. To run Cooling mode overriding the freeze stat. function, adjust the preset tem-

perature below which the freeze stat. function is activated. (Refer to “<Freeze stat function>” on Page 49.

The electric heaters are activated shortly after DHW or LP mode starts running after Cooling mode.

The setting time period of Heat-pump-only operation is short.

Adjust the setting time period of Heat-pump only operation. (Refer to “<Electric heater (DHW)> on Page 47.

During DHW or LP mode following the cooling mode, error

L6 (circulation water freeze protection)

occurs and operation stops frequently.

If the preset temperature below which the freeze stat. function is activated is low, error L6 is more likely to occur interruption operation before the freeze stat. function is activated.

Adjust the preset temperature below which the freeze stat. function is activated. (Refer to “<Freeze stat function>” on Page 49.

Annual Maintenance

It is essential that the hydrobox is serviced at least once a year by a qualied individual any spare parts required MUST be purchased from Mitsubishi Electric (safety matter).

NEVER bypass safety devices or operate the unit without them being fully operational.

WARNING: DRAINED WATER MAY BE VERY HOT

1. Before attempting to drain the hydrobox islolate from the electrical supply to prevent booster heater burning out.

2. Isolate hydrobox from primary water circuit and drain water from hydrobox. Use a suitable heat resistant hose to assist in these operations.

3. Drain any remaining water from booster heater using tted drain cock and hose to safely drain the unit.

4. After the hydrobox is drained, water remains in the following component parts. Drain water completely by checking the inside of the parts.

• Strainer (Remove the strainer cover.)

• Pressure relief valve (Operate the valve.)

Use the Annual Maintenance Log Book as a guide to carrying out the necessary checks on the hydrobox and outdoor unit.

Page 60

Service and Maintenance

Error Codes

Code Error Action

L3 Circulation water temperature overheat protection

Flow rate may be reduced check for;

• Water leakage

• Strainer blockage

• Water circulation pump function (Error code may display during lling of primary circuit, complete lling and reset error code.)

L4 DHW tank water temperature overheat protection Check the immersion heater and it’s contactor.

Indoor unit temperature thermistor (THW1, THW2, THW5, THW6, THW7, THW8,

THW9) failure

Check resistance across the thermistor.

L6 Circulation water freeze protection See Action for L3. L8 Heating operation error Re-attach any thermistors that have become dislodged.

L9 Low primary circuit ow rate detected by ow switch (ow switches 1, 2, 3)

See Action for L3. If the ow switch itself does not work, replace it.

Caution: The pump valves may be hot, please take care.

LC Boiler circulation water temperature overheat protection

Check if the setting temperature of the Boiler for heating exceeds the re-

striction. (See the manual of the thermistors "PAC-TH011HT-E") Flow rate of the heating circuit from the boiler may be reduced. Check for

water leakage, strainer blockage

water circulation pump function.

•

LD Boiler temperature thermistor (THWB1, THWB2) failure Check resistance across the thermistor. LE Boiler operation error See Action for L8. Check the status of the boiler.

LH Boiler circulation water freeze protection

Flow rate of the heating circuit from the boiler may be reduced. Check for

water leakage strainer blockage

water circulation pump function.

•

LL Setting errors of Dip switches on FTC4 control board

For boiler operation, check that Dip SW1-1 is set to ON (With Boiler) and Dip SW2-6 is set to ON (With Mixing Tank). For 2-zone temperature control, check Dip SW2-7 is set to ON (2-zone)

and Dip SW2-6 is set to ON (With Mixing Tank). J0 Communication failure between FTC4 and wireless receiver Check connection cable for damage or lose connections. P1 Thermistor (Room temp.) (TH1) failure Check resistance across the thermistor. P2 Thermistor (Ref. liquid temp.) (TH2) failure Check resistance across the thermistor.

P6 Anti-freeze protection of plate heat exchanger

See Action for L3.

Check for correct amount of refrigerant.

J1 - J8 Communication failure between wireless receiver and wireless remote controller

Check wireless remote controller’s battery is not at.

Check the pairing between wireless receiver to wireless remote controller.

Test the wireless communication. (See the manual of wireless system) E0 - E5 Communication failure between main controller and FTC4 Check connection cable for damage or loose connections.

E6 - EF Communication failure between FTC4 and outdoor unit

Check that the outdoor unit has not been turned off.

Check connection cable for damage or loose connections.

Refer to outdoor unit service manual.

E9 Outdoor unit receives no signal from indoor unit.

Check both units are switched on. Check connection cable for damage or

loose connections. Refer to outdoor unit service manual. U*, F* Outdoor unit failure Refer to outdoor unit service manual.

Note: To cancel error codes please switch system off (Press button E, on Main Controller, for 3 secs).

Page 61

Service and Maintenance

Engineers Forms (1/2)

Should settings be changed from default, please enter and record new setting in ‘Field Setting’ column. This will ease resetting in the future should the system use change or the circuit board need to be replaced.

Commissioning/Field settings record sheet

Main controller screen Parameters

Default setting

Field setting

Notes

Main Zone1 heating room temp 10°C - 30°C 20°C

Zone2 heating room temp *1 10°C - 30°C 20°C

Zone1 heating ow temp 25°C - 60°C 45°C Zone2 heating ow temp *1 25°C - 60°C 35°C Cooling ow temp *2 5°C - 25°C 15°C

Zone1 heating compensation curve −9°C - + 9°C 0°C Zone2 heating compensation curve *1 −9°C - + 9°C 0°C Holiday mode Active/Non active/Set time –

Option Forced DHW operation On/Off –

DHW On/Off/Timer On Heating On/Off/Timer On Holiday mode Active/Non active/Set time –

Setting DHW *3 Operation mode Normal/Eco Normal

DHW max. temp. 40°C - 60°C 50°C DHW temp. drop 5°C - 30°C 10°C DHW max. operation time 30 - 120 mins 60 mins DHW mode restriction 30 - 120 mins 30 mins

Legionella prevention *3 Active Yes/No Yes

Hot water temp 60°C - 70°C 65°C Frequency 1 - 30 days 15 days Start time 00.00 - 23.00 03.00 Max. operation time 1 - 5 hours 3 hours Duration of maximum temp. 1 - 120 mins 30 min

Heating/Cooling *2 Zone1 operation mode Heating room temp/Heating ow temp/Heating

compensation curve/Cooling ow temp

Room temp

Zone2 operation mode *1 Heating room temp/Heating ow temp/Heating

compensation curve

Compensation

curve Compensation curve

Hi set point Zone1 outdoor ambient temp −15°C - +35°C –15°C

Zone1 ow temp 25°C – 60°C 50°C Zone2 outdoor ambient temp *1 −15°C - +35°C –15°C Zone2 ow temp *1 25°C - 60°C 40°C

Lo set point Zone1 outdoor ambient temp −15°C - +35°C 35°C

Zone1 ow temp 25°C - 60°C 25°C Zone2 outdoor ambient temp *1 −15°C - +35°C 35°C Zone2 ow temp *1 25°C - 60°C 25°C

Adjust Zone1 outdoor ambient temp −14°C - +34°C —

Zone1 ow temp 25°C - 60°C — Zone2 outdoor ambient temp *1 −14°C - +34°C — Zone2 ow temp *1 25°C - 60°C —

Holiday DHW *3 Active/Non active Non active

Heating/Cooling *2 Active/Non active Active Zone1 heating room temp 10°C - 30°C 15°C Zone2 heating room temp *1 10°C - 30°C 15°C

Zone1 heating ow temp 25°C - 60°C 35°C Zone2 heating ow temp *1 25°C - 60°C 25°C Cooling ow temp *2 5°C - 25°C 25°C

Initial settings Language

ENG/FR/GER/SW/SP/IT/DA/NL/FIN/NOR/PT ENG

°C/°F

°C/°F °C

Temp. display

Room/DHW tank/Room&DHW tank /Off Off

Time display

hh:mm/hh:mm AM/AM hh:mm hh:mm

Room sensor settings for Zone1

TH1/Main RC/Room RC1-8/“Time/Zone” TH1

Room sensor settings for Zone2 *1

TH1/Main RC/Room RC1-8/“Time/Zone” TH1

Room RC zone select *1

Zone1/Zone2 Zone1

Service menu Thermistor

adjustment

THW1 −10°C - +10°C 0°C THW2 −10°C - +10°C 0°C THW5 −10°C - +10°C 0°C THW6

−10°C - +10°C 0°C THW7 −10°C - +10°C 0°C THW8

−10°C - +10°C 0°C THW9 −10°C - +10°C 0°C

THWB1 −10°C - +10°C 0°C THWB2 −10°C - +10°C 0°C

Auxiliary settings Economy settings

for pump

On/Off On Time before pump switched off (3 - 60 mins) *4

10 mins Electric heater (Heating)

Space heating: On (used)/Off (not used) On

Electric heater delay timer (5 - 180 mins) 30 mins Electric heater (DHW) *3

DHW: On (used)/Off (not used) On

Electric heater delay timer (15 - 30 mins) 15 mins Mixing valve

control

Running time (10 - 240 secs) 120 secs

Interval (1 - 30 mins) 2 mins Pump speed Pump speed (1 - 5) 5

*1 The settings related to Zone2 can be switched only when Zone2 temperature control is enabled (when Dip SW2-6 and SW 2-7 are ON). *2 Cooling mode settings are available for ERSC-VM2B only. *3 Only available if DHW tank present in system. *4 Decreasing “time before pump switched off” may increase the duration of stand-by in Heating mode.

Page 62

Service and Maintenance

Engineers Forms (2/2)

Commissioning/Field settings record sheet (continued from the previous page)

Main controller screen Parameters

Default setting

Field setting

Notes

Service menu Heat source setting Standard/Heater/Boiler/Hybrid *5 Standard

Operation settings

Freeze stat function Outdoor ambient temp. (3 - 20°C) 5°C Simultaneous

operation (DHW/ Heating)

On/Off *6 Off

Outdoor ambient temp. (−15 - +10°C) −15°C

Cold weather function

On/Off *6 Off

Outdoor ambient temp. (−15 - −10°C) −15°C Room temp control (Heating)

Temp. control interval (10 - 60 mins) 10 mins

Flow temp. range

Min. temp. (25 - 45°C)

30°C

Max. temp. (35 - 60°C)

50°C

Heat pump thermo diff.

adjust

On/Off *6 On

Lower limit (−9 - −1°C)

−5°C

Upper limit (+3 - +5°C)

5°C

Boiler operation

Hybrid settings Outdoor ambient temp. (−15 - +10°C) −15°C

Priority mode (Ambient/Cost/CO

)

Ambient

Intelligent settings Energy price *7Electricity (0.001 - 999 */kWh)

0.5

*/kWh

Boiler (0.001 - 999 */kWh)

0.5

*/kWh CO2 emission

Electricity

(0.001 - 999 kg -CO2/kWh)

0.5 kg -CO2/kWh

Boiler (0.001

- 999 kg

-CO2/kWh)

0.5 kg -CO2/kWh

Heat source Heat pump capacity

- 40 kW)

11.2

Boiler efciency (25

- 150%)

80%

Booster heater 1 capacity

- 20 kW)

2 kW

Booster heater 2 capacity

- 20 kW)

4 kW

Floor dry up function

On/Off *6 Off Target temp. Start&Finish

(25 - 60°C) 30°C

Max. temp.

(25 - 60°C) 45°C

Max. temp. period

(1 - 20 days)

5 days

Flow temp. (Increase)

Temp. increase step (+1 - +10°C) +5°C Increase interval (1 - 7 days)

2 days

Flow temp. (Decrease)

Temp. decrease step (−1 - −10°C)

−

5°C

Decrease interval (1 - 7 days)

2 days

External input settings

Demand control

(IN4)

Heat source OFF/Boiler operation Boiler

operation

Outdoor thermostat

(IN5)

Heater operation/Boiler operation Boiler

operation

*5 When Dip SW1-1 is set to OFF “WITHOUT Boiler” or SW2-6 is set to OFF “WITHOUT Mixing tank”, neither Boiler nor Hybrid can be selected.

*6 On: the function is active; Off: the function is inactive.

*7 “*” of “*/kwh” represents currency unit (e.g. € or £ or the like)

Page 63

Service and Maintenance

Annual Maintenance Log Book

Contractor name Engineer name Site name Site number

Hydrobox maintenance record sheet Warranty number Model number

Serial number

No. Mechanical Frequency Notes

Isolate and drain hydrobox, remove mesh from internal strainer clean and replace.

Open the pressure relief valve, check for unrestricted discharge to the tundish and that the valve reseats correctly. Check there are no blockages in the tundish and associated pipe work.

Drop the primary/heating system pressure to zero check and if necessary

top up the expansion relief vessel (1 bar). Air valve of expansion vessel is TR-412.

Check and if necessary top up the concentration of anti-freeze/inhibitor (if used in the system).

Top up the primary/heating system using an appropriate lling loop and

re-pressurise to 1 bar.

Heat system and check pressure does not rise above 3 bar and no water is released from the safety valves.

7 Release any air from the system.

Refrigerant models only [EXCEPT EHPX] Frequency Notes

1 Refer to outdoor unit manual.

Electrical Frequency Notes 1 Check condition of cables. 2 Check rating and fuse tted on the electricity supply.

Controller Frequency Notes 1 Check eld settings against factory recommendations. 2 Check battery power of wireless thermostat and replace if necessary.

Outdoor heat pump unit maintenance record sheet Model number Serial number

Mechanical Frequency Notes 1 Inspect grill, heat exchanger ns and air inlet for trapped debris/damage. 2 Check condensate drain provision. 3 Check integrity of water pipe work and insulation. 4 Check all electrical connections. 5 Check and record the operation voltage.

* All the above checks should be carried out once a year.

Note:

Within the rst couple of months of installation, remove and clean the hydrobox’s strainer plus any that are tted external to the hydrobox. This is especially

important when installing on an existing system.

In addition to annual servicing it is necessary to replace or inspect some parts after a certain period of system operation. Please see tables below for detailed instructions.

Replacement and inspection of parts should always be done by a competent person with relevant training and qualications.

Parts which require regular replacement

Parts Replace every Possible failures

Pressure relief valve (PRV) Air vent (Auto/Manual) Drain cock (Primary circuit)

Flexible hose Manometer

6 years

Wat er leaka ge due to brass/copper corrosion

(Dezincication)

Parts which require regular inspection

Parts Check every Possible failures

Immersion heater 2 years

Ear th leakage causing circuit breaker to activate

(Heater is always OFF)

Water circulation pump 20,000 hrs (3 years)

Water circulation pump failure

Parts which must NOT be reused when servicing

* O-ring * Gasket

Note: Always replace the gasket for pump with a new one at each regular maintenance

(every 20,000 hours of use or every 3 years).

Page 64

Supplementary information

Refrigerant collecting (pumpdown) for split model systems only

Refer to “Refrigerant collection” in the outdoor unit installation manual or service manual.

Back-up operation of boiler

Heating operation is backed up by boiler.

For more details, refer to the installation manual of PAC-TH011HT-E.

1. Set Dip-SW 1-1 to ON "With boiler" and SW2-6 to ON “With Mixing tank”.

2. Install the thermistors THWB1 (Flow temp.) and THWB2 (return temp.) *1 on the boiler circuit.

3. Connect the output wire (OUT10: Boiler operation) to the signal input (room thermostat input) on the boiler. *2

4. Install one of the following room temp. thermostats. *3

Wireless remote controller (option) Room temp. thermostat (eld supply) Main controller (remote position)

*1 The boiler temp. thermistor is an optional part.

*2 OUT10 has no voltage across it.

*3 Boiler heating is controlled on/off by the room temp. thermostat.

1. Go to Service menu > Heat source setting and choose “Boiler” or “Auto”. *3

2. Go to Service menu > Operation settings > Boiler settings to make detailed settings for “Auto” above .

*3 The “Auto” automatically switches heat sources between Heat pump (and Electric heater) and boiler.

Multiple outdoor units control

To realize bigger systems by using multiple outdoor units, up to 6 units of the same model can by connected. The hydrobox can be used as a slave unit for multiple outdoor unit control.

For more details, refer to the installation manual of PAC-IF051/052B-E.

Set Dip SW4-1 to ON “Active: multiple outdoor unit control”. Keep Dip SW4-2 OFF (default setting) (master/slave setting: slave).

Set Dip SW1-3 to ON when the hydrobox is connected to a DHW tank.

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Mitsubishi Electric Ecodan EHSC, Ecodan ERSC, Ecodan EHPX Installation Manual

Specifications and Main Features

Frequently Asked Questions

User Manual