REMEHA Fusion and Fusion Hybrid Mode d'emploi

Marque: REMEHA

Modèle: Fusion and Fusion Hybrid

Catégorie: Pompes à chaleur

Taper: Mode d'emploi

Heat pump

United Kingdom

After Sales

Service guide

Gas HP 35 A (LT/HT)

renewable technologies

Remeha Gas HP 35 A

(LT/HT)

CONTENTS

1 INTRODUCTION 4

1.1 Symbols 4

1.2 Terms and abbreviations 4

1.3 Liability 4

1.3.1 Manufacturer's liability 4

1.3.2 Installer's responsibility 5

1.3.3 User's responsibility 5

1.4 Supplementary guidelines 5

2 SAFETY INSTRUCTIONS AND RECOMMENDATIONS 6

2.1 Safety instructions 6

2.2 Recommendations 6

3 TECHNICAL DESCRIPTION 7

4 THERMAL DESIGN 8

4.1 Control design 8

4.2 Hydraulic design 8

4.2.1 Buffer vessel 9

4.3 Hydraulic diagrams 9

5 GENERAL INSTALLATION 11

5.1 Installation instructions 11

5.2 Important points to consider 11

5.3 Noise and vibrations 11

5.3.1 Noise 11

5.3.2 Vibrations 12

5.4 Frost protection 12

5.4.1 Defrosting cycle 12

5.5 Water treatment 13

6 INSTALLING A SINGLE HEAT PUMP 14

6.1 Scope of delivery 14

6.2 Hydraulic installation 14

6.2.1 Hydraulic connections 14

6.2.2 Gas connections 14

6.2.3 Connecting the condensate drain pipe 14

6.3 Electrical connections and control - general 14

6.3.1 Connecting to the main power supply 14

6.3.2 Controlling the heat pumps via a 0-10 V signal 14

6.3.3 Controlling the heat pumps via an On/Off signal 14

6.3.4 Connecting a water circulation pump 14

6.4 Electrical connections and control - OpenTherm 14

6.4.1 Introduction to the CAN-bus 15

6.4.2 Connecting the CAN-bus to the Gas HP heat pump 16

6.4.3 Connecting the CAN-bus to the CAN-OT interface - two nodes 17

6.4.4 Connecting the CAN-bus to the CAN-OT interface - several nodes 18

6.4.5 LED signals for CAN-OT interface 19

6.4.6 Setting CAN-bus address on the Gas HP heat pump 19

6.4.7 Connecting the Remeha OpenTherm controller 20

7 INSTALLING SEVERAL HEAT PUMPS ON A SKID 21

7.1 Scope of delivery 21

7.2 Technical data 21

7.3 Hydraulic installation 24

7.3.1 General installation instructions 24

7.3.2 Positioning the system 24

7.3.3 Hydraulic connections 26

7.3.4 Gas connections 30

7.3.5 Connecting the condensate drain pipe 30

7.4 Electrical connections and control - general 31

7.4.1 Connecting to the main power supply 31

7.4.2 Connecting the secondary circuit pump 33

7.4.3 Controlling the heat pumps via an On/Off signal 33

7.4.4 Wiring diagram 34

7.5 Electrical connections and control - OpenTherm 34

7.5.1 Introduction to the CAN-bus 35

7.5.2 Connecting the CAN-bus to the GEP connectors - single skid 36

7.5.3 Connecting the CAN-bus to the GEP connectors - several skids 38

7.5.4 Connecting the CAN-bus to the CAN-OT interfaces 39

7.5.5 LED signals for CAN-OT interface 41

7.5.6 Setting CAN-bus address on the heat pump 41

7.5.7 Connecting the Remeha OpenTherm controller 42

7.5.8 Connecting a water circulation pump 42

7.5.9 Controlling the heat pumps via a 0-10 V signal 42

7.6 Connection options for the 0-10 V control PCB (IF-01) 43

7.6.1 Connection status (Nc) 43

7.6.2 Connection (OTm) 43

7.6.3 Analogue input (0-10 V) 43

7.6.4 Analogue control based on temperature () 43

7.6.5 Analogue control based on heat output (%) 43

7.6.6 Analogue output (0-10 V) 44

8 COMMISSIONING AND LEGISLATION 45

8.1 Introduction 45

8.2 Regulations and application 45

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8.3.1 General 45

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8.3.3 Version and scope of delivery of heat pump 46

8.4 Points to consider when operating the system 46

8.5 Other 46

9 INSPECTION AND MAINTENANCE 47

Remeha Gas HP 35 A

(LT/HT)

This manual is a supplement to the Installation and service

manual for the Remeha Gas HP 35 A gas absorption heat

pump. The manual contains extra information on the design,

installation and maintenance of the heat pump system.

mWARNING

For instructions regarding installation and use of the

device, please see the installation, user and maintenance

documentation supplied with the device.

1.1 Symbols

This manual uses various danger levels to draw attention to

the special instructions. We do this to increase the safety of the

user, to prevent problems and to ensure the technical reliability

of the device.

mDANGER

Risk of dangerous situations resulting in serious personal

injury.

mWARNING

Risk of dangerous situations resulting in minor personal injury.

mCAUTION

Risk of material damage.

oPlease note, important information

1.2 Terms and abbreviations

 GEP: switch box for the appliance (marked with MAIN

where necessary).

 SWW: domestic hot water

 Skid: heating unit consisting of one general switch box

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that are connected to one another beforehand for gas,

central heating and electricity and linked to one another by

supporting beams.

1.3 Liability

1.3.1 Manufacturer's liability

Our products are manufactured in accordance with the various

guidelines that apply and are therefore supplied with the CE

symbol and all required documents.

Due to our permanent focus on the quality of our products, we

are constantly looking for ways to improve them. We therefore

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document.

The manufacturer cannot be held liable in the following cases:

 Failure to observe the user instructions for the appliance.

 Overdue or inadequate maintenance of the appliance.

 Failure to observe the installation instructions for the

appliance.

1 INTRODUCTION

The manufacturer will perform the initial commissioning of the

heat pump system.

1.3.2 Installer's responsibility

The installer is responsible for the installation and the initial

commissioning of the appliance. The installer must observe the

following instructions:

 Read and observe the instructions for the appliance found

in the accompanying manuals.

 Install the device in accordance with current legislation and

standards.

 Perform all necessary checks.

 Explain the installation to the user.

 If maintenance is required, alert the user to the inspection

and maintenance obligations relating to the appliance.

 Hand over all manuals to the user.

1.3.3 User's responsibility

In order to guarantee optimum functioning of the installation,

you must observe the following instructions:

 Read and observe the instructions for the appliance found

in the accompanying manuals.

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installation.

 Ask Remeha to perform initial commissioning of the

appliance.

 Ask the installer to explain the installation.

 Ensure that the necessary checks and maintenance work

are carried out.

 Keep the manuals in good condition and near to the

appliance.

This appliance must not be used by people (and children)

with a physical, sensory or mental disability, or by people with

a lack of technical experience, unless they are supervised

by someone who can assure their safety, or they have been

instructed in the correct use of the appliance. Do not allow

children to play with the appliance.

1.4 Supplementary guidelines

In addition to the legal requirements and guidelines, the

supplementary guidelines in this manual must also be followed.

Supplements or subsequent regulations and guidelines that are

valid at the time of installation shall apply to all regulations and

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Remeha Gas HP 35 A

(LT/HT)

2.1 Safety instructions

mDANGER

If you smell gas:

1. 'RQRWXVHQDNHGÀDPHVGRQRWVPRNHDQGGRQRWRSHUDWH

electrical contacts or switches (doorbell, lighting, motor, lift

etc).

2. Shut off the gas supply.

3. Trace possible leaks and seal them off immediately.

4. If the leak is upstream of the gas meter, notify the gas

company.

mDANGER

,I\RXVPHOOÀXHJDVHV

1. Turn off the device.

2. Trace possible leaks and seal them off immediately.

mDANGER

The heat pump has a closed cooling circuit with an ammonia/

water mixture under overpressure:

1. Avoid contact with skin and do not inhale or swallow the

ammonia mixture.

2. Do not carry out any work on the closed cooling circuit or

on the valves.

mDANGER

If you smell ammonia:

1. Turn off the device.

2. Keep your distance and avoid inhaling ammonia fumes.

3. Do not carry out any work on the closed cooling circuit

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2.2 Recommendations

mWARNING

 Installation and maintenance of the appliance must be

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and national regulations.

 When performing work on the appliance, always disconnect

it from the power supply and close the main gas valve.

 Check the entire system for leaks after maintenance and

servicing work.

Casing panels

Casing panels may only be removed for maintenance and

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and servicing are complete.

2 SAFETY INSTRUCTIONS AND RECOMMENDATIONS

The technical data for the heat pump can be found in the

Installation and service manual for the heat pump.

3 TECHNICAL DESCRIPTION

Remeha Gas HP 35 A

(LT/HT)

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appliances, but it is essential that they are integrated correctly

in the heating system in order to obtain maximum output. The

thermal characteristics of the system need to be designed

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pumps.

4.1 Control design

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has a low thermal capacity on the user side, adding a buffer

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 7KHHI¿FLHQF\RIWKHKHDWSXPSVLVLQFUHDVHGZKHQWKH

outgoing water temperature is decreased.

 The system must be designed so that the return

temperature is kept as low as possible, for example by

using modulating system pumps (the heat pump switches

off if the maximum return temperature is exceeded).

4.2 Hydraulic design

 The choice between the HT and LT versions of the heat

pump depends on the type and design of the distribution

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The HT version has a maximum return temperature of 55°C

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operation at return temperatures below 25°C.

 When the design return temperature of the system is

lower than 55°C, back-up boilers are not needed for low

outside temperatures. The output ratio between the heat

pumps and the extra boilers can be determined based on

the limiting investment on the one hand and the average

HI¿FLHQFLHVRQWKHRWKHU

 When the design return temperature of the system is higher

than 55°C, back-up boilers are needed for low outside

temperatures. The output of these boilers (excluding the

KHDWSXPSRXWSXWPXVWEHVXI¿FLHQWIRUWKHV\VWHPVKHDW

demand at the design temperature.

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above the maximum temperature of the heat pump when

the extra boilers are hydraulically connected to the heat

pumps in series (see also Fig. 02 and Fig. 03).

 The gas absorption heat pump is not the most suitable

method of producing domestic hot water. The heat pump

can be used, however, to pre-heat domestic hot water

where a more complex and more expensive hydraulic

design is acceptable.

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mixture to protect the heat exchanger from freezing.

Unfortunately, the temperature difference across the heat

H[FKDQJHUZLOOORZHUWKHHI¿FLHQF\RIWKHKHDWSXPS

mCAUTION

It is important for both the central heating boilers and the heat

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SDUWRIWKHK\GUDXOLFGHVLJQVLQFHHI¿FLHQF\LQFUHDVHVLIWKH

system is set correctly for both the hydraulics and controls.

4 THERMAL DESIGN

4.2.1 Buffer vessel

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QRWKDYHVXI¿FLHQWFDSDFLW\DEXIIHUYHVVHOFDQEHEXLOWLQWRWKH

system. The buffer vessel acts as a thermal energy battery,

reducing the number of starts for the heat pumps. Too many

VWDUWVLQDVKRUWSHULRGRIWLPHUHGXFHWKHDYHUDJHHI¿FLHQF\RI

the heat pumps.

The volume of the buffer vessel (in litres) can be found in the

table below.

Number of Gas HP units Effective volume* of buffer

vessel in l

1 300

2 500

3 800

4 1000

5 1000

 (IIHFWLYHYROXPH YROXPHEHWZHHQÀRZDQGUHWXUQ

connections on the buffer vessel

Table 01 Buffer vessel volume

Legend

1 Air vent

2 Lifting eye

 +HDWSXPSÀRZ

4 Temperature recorder

5 Temperature recorder

6 Temperature recorder

7 Temperature recorder

8 Temperature recorders

9 Heat pump return

10 Draining outlet

11 Separation plate (perforated)

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13 Effective volume

14 Central heating system return

4.3 Hydraulic diagrams

The following examples only give a broad outline of the

principle of heat production.

mCAUTION

It is important for both the central heating boilers and the heat

SXPSVWKDWWKHFRQ¿JXUDWLRQRIWKHKHDWWUDQVIHUHOHPHQWLV

SDUWRIWKHK\GUDXOLFGHVLJQVLQFHHI¿FLHQF\LQFUHDVHVLIWKH

system is set correctly for both the hydraulics and controls.

T003992-A

Fig. 01 Schematic drawing of the buffer vessel

Remeha Gas HP 35 A

(LT/HT)

T004284-A

Fig. 02 Hydraulic diagram with Quinta Pro boilers

T004285-B

Fig. 03 Hydraulic diagram with Gas 310 boilers

5.1 Installation instructions

mWARNING

7KHDSSOLDQFHPXVWEHLQVWDOOHGE\DTXDOL¿HGLQVWDOOHULQ

accordance with local and national regulations.

5.2 Important points to consider

 The temperature curve for the heat production section must

be within the range of the heat pumps (over a long period).

 The buffer vessel must not be brought up to temperature

regularly by groups heated to high temperatures where the

temperature curve greatly exceeds the temperature curve

for the heat pumps, such as a boiler group. This means that

these groups must not be present or must be disconnected.

 The heat pumps must be supported on the main supporting

structure. It is advisable to consult a structural engineer

about this. The structural engineer can also advise on

how to prevent contact noise to the homes involved. To

HQVXUHWKHUHLVVXI¿FLHQWULJLGLW\ERWKWKHVXSSRUWLQJEHDPV

and stands under the frame must be at least HEB 160.

7KHSUR¿OHFDQEHKHDYLHULIWKLVLVLQGLFDWHGE\WKHORDG

capacity calculation. This depends on the model.

 7KHKHDWSXPSVPXVWEHFRQQHFWHGZLWKÀH[LEOH

connections. This applies to both the gas pipe and the

central heating pipes.

 The heat pumps can be controlled on and off or modulated

with a 0-10 signal (option). OpenTherm control is possible

under certain conditions. Contact our Sales Support

department about this.

 ,I¿OOHURWKHUWKDQDJO\FROPL[WXUHLVXVHGWKHLQVWDOOHU

himself must provide (better) insulation and an electric frost

protection cable. This also includes the pipe work supplied

with the skid.

 The pipe work on the accompanying skid has limited

insulation; it is up to the installer to provide better insulation.

 Evaluation of the complete hydraulic system and

corresponding control engineering should be part of the

inventory. In order to achieve the desired savings and

HI¿FLHQFLHVWKHV\VWHPPXVWEHFRQ¿JXUHGFRUUHFWO\IRU

both the hydraulics and controls.

 Proper monitoring must to be carried out to monitor

the above point. This includes regular evaluation of the

temperature curve and release of the heat-producing

components (heat pumps and boilers). A low supply water

temperature has a positive effect on the operating time

of the heat pump. A low return water temperature has the

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5.3 Noise and vibrations

5.3.1 Noise

Noise production of Remeha Gas HP heat pumps

Principles relating to the numbers in Table 02:

 This refers to a point source of sound, placed on a

UHÀHFWLYHVXUIDFHDVFRQVLGHUHGIURPWKHIURQW

 The amount of nuisance for the surrounding area is

also determined by the installation site. This means the

distance and any vertical outer walls in the vicinity will be of

LQÀXHQFH

5 GENERAL INSTALLATION

Remeha Gas HP 35 A

(LT/HT)

Distance Gas HP 35 A

Noise capacity 73 dB(A)

Noise pressure 5 m 51 dB(A)

6 m 49 dB(A)

7 m 48 dB(A)

8 m 47 dB(A)

9 m 46 dB(A)

10 m 45 dB(A)

11 m 44 dB(A)

12 m 43 dB(A)

13 m 43 dB(A)

14 m 42 dB(A)

15 m 41 dB(A)

Table 02 Noise pollution related to the distance from the heat

pump (1 unit)

Positioning the heat pumps

Preferably install the heat pump on the roof and maintain the

following distances, if possible:

 At least 4 m from the roof edge to prevent downward

radiation.

 At least 1.5 m away from any rising outer wall to avoid

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A noise specialist can determine whether the noise pressure

complies with the norms for factors such as the outer walls of

adjacent homes or at the edges of the property line. Additional

noise reduction measures can be taken, if necessary, such as

the installation of noise barriers.

5.3.2 Vibrations

 The heat pumps must be supported on the main supporting

structure. Ask a structural engineer for advice. He will also

be able to give advice on how to prevent structure-borne

noise being carried to any living areas.

 9LEUDWLRQGDPSHUVPXVWEH¿WWHGEHWZHHQWKHKHDW

pumps and the support construction. Standard dampers

are available as an option. Any customised work must

be carried out in consultation with a (noise) expert. The

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 7KHKHDWSXPSVPXVWEHFRQQHFWHGZLWKÀH[LEOHDQWL

vibration connections. This applies to both the gas and

central heating pipes.

5.4 Frost protection

 Every heat pump has an antifreeze function that can be

activated; see the Installation and service manual for the

heat pump.

 The extra frost protection measures for a heat pump

system on a skid are explained in section 7.3.3.

 The use of glycol is dealt with in detail in chapter 4.5 of the

Installation and service manual .

5.4.1 Defrosting cycle

If the heat pump is operating with outside temperatures at

around freezing point or below, the water vapour from the

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If the automatic antifreeze function is activated, the heat

pump will continue to supply heat to the system and start

up a defrosting cycle. This means that the evaporation and

condensation process does not need to be reversed.

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fed from the generator (with a temperature of approx. 80°C)

directly to the evaporator, quickly getting rid of ice on the

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to supply heat to the central heating water.

Experience has shown that no more than 50 defrosting

cycles are needed during a normal winter. A cycle only lasts

an average of 3 minutes thanks to the high condensation

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F\FOHKDVQRPHDVXUDEOHHIIHFWRQWKHHI¿FLHQF\RIWKH

Remeha heat pump.

5.5 Water treatment

See the Installation and service manual for the heat pump.

Remeha Gas HP 35 A

(LT/HT)

The installation of the heat pump is described in the

accompanying Installation and service manual. This chapter

provides additional information about possible connections.

6.1 Scope of delivery

See the Installation and service manual for the heat pump.

6.2 Hydraulic installation

6.2.1 Hydraulic connections

See the Installation and service manual for the heat pump.

6.2.2 Gas connections

See the Installation and service manual for the heat pump.

6.2.3 Connecting the condensate drain pipe

See the Installation and service manual for the heat pump.

6.3 Electrical connections and control - general

6.3.1 Connecting to the main power supply

See chapter 5 of the Installation and service manual for the

heat pump.

6.3.2 Controlling the heat pumps via a 0-10 V signal

The heat pumps can be controlled via a 0-10 V signal, which

allows the pumps to be modulated between 50 and 100%

output. Each unit is connected separately to a 0-10 V signal.

The 0-10 V control is an expansion of the OpenTherm control.

An OT-0-10V interface must be connected to each CAN-OT

interface. This OT-0-10V interface is available as an accessory

and must be built into a switch box (to be supplied by a

third party). See section 7.5.9 for an explanation of how the

interface works.

6.3.3 Controlling the heat pumps via an On/Off signal

The heat pumps can be controlled via one On/Off signal per

unit. See the Installation and service manual for the heat pump

for the correct connections

6.3.4 Connecting a water circulation pump

Each heat pump unit can control its own circulation pump. See

the Installation and service manual for the heat pump for the

connections.

If a Rematic MC controller is used in a system with several

heat pumps, a secondary circulation pump (230 V, max. 400

VA) can be controlled on/off.

6.4 Electrical connections and control - OpenTherm

This section describes the connection of one or more heat

SXPSVRQD&$127LQWHUIDFH)RUVSHFL¿FLQIRUPDWLRQDERXW

how to use and program a Remeha OpenTherm controller, see

the accompanying manuals.

The Remeha Gas HP heat pump and the Remeha OpenTherm

controllers communicate via the CAN-OT connection. Each

heat pump requires one CAN-OT interface that needs to be

built into a switch box supplied by a third party.

The CAN-bus is a network of Gas HP heat pumps and CAN-

OT interfaces, called nodes, that are connected via a protected

3-wire cable. The network can have two types of nodes:

T003998-B

Status

On/o

CAN

Main

0-10

OTm

0 +

1 2 3

(A)

Fig. 04 OT-0-10V interface (A) and CAN-OT interface (B)

without cover plate

6 INSTALLING A SINGLE HEAT PUMP

1. End nodes

2. Intermediate nodes

There are two ways to create the CAN-bus:

 Two nodes on the CAN-bus, one CAN-OT interface and

one heat pump, see Fig. 05 (A).

 Several nodes on the CAN-bus, several CAN-OT interfaces

and several heat pumps, see Fig. 05 (B)

mCAUTION

The OpenTherm bus only allows point-to-point connections.

Legend

1 Heat pump

2 CAN-OT interface

3 OT controller

4 OT cascade controller

5 Outside

6 Inside

6.4.1 Introduction to the CAN-bus

The CAN-bus cable must comply with the Honeywell SDS

standard. The table below shows details for a number of CAN-

bus cable types, grouped according to the maximum distance

for each cable type.

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of six nodes (e.g. three heat pumps and three CAN-OT

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The CAN-connection requires a CAN-bus cable with three

wires. If the available cable has more than three coloured

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DQGFXWWKHRWKHUVXSHUÀXRXVZLUHVRII

The entire length of the CAN-bus cable must be protected with

a casing that meets the following requirements:

 Nominal diameter 17 mm

 T-section

T004289-B

CAN

OT OT

Fig. 05 CAN-bus with two nodes (A) and several nodes (B)

CABLE NAME SIGNAL/COLOUR* MAX. LENGTH

Honeywell SDS 1620 standard

BELDEN 3086A H = BLACK L = WHITE GND = BROWN 450 m

TURCK type 530

DevideNet Mid Cable

TURCK type 5711 H = BLUE L = WHITE GND = BROWN 450 m

Honeywell SDS 2022 standard

TURCK type 531 H = BLUE L = WHITE GND = BROWN 200 m

* In all cases: do not use the fourth wire.

Table 03 CAN-bus cable types

Remeha Gas HP 35 A

(LT/HT)

 Operating temperature 105°C

 Flame retardant

 Resistant to acid, oil, solvents and fuels

The TEAFLEX PAS T 17S casing meets these requirements.

6.4.2 Connecting the CAN-bus to the Gas HP heat pump

The CAN-bus cable must be connected to the special

connector that is located on the internal control unit for the heat

pump.

Legend

A Insulation tape to protect the controller

B CAN-bus cable casing (pre-wired from the penultimate

heat pump)

C Bracket to secure the CAN-bus cable

D Connector to connect the CAN-bus cables (see Fig. 07

and Fig. 08)

E Wires (3) for the CAN-bus cable

F Bracket to secure the CAN-bus cable to the next heat

pump (intermediate node)

mWARNING

Make sure the heat pump has been disconnected from the

power supply before starting work on the electrical panel.

1. Cut off a piece of cable that is long enough for the

connection without any loops forming.

2. Remove approximately 70-80 mm of the cable casing

and the wires within it. Make sure you do not damage the

shield.

3. If the cable used is too thin to be secured in the cable

bracket (see C in Fig. 06), thicken the cable by wrapping

insulation tape around the cable casing next to the stripped

section (up to a diameter of approx. 12-13 mm).

4. Pull the shield back over the cable casing and use

insulation tape to fasten the end of the shield that has been

pulled back (see Fig. 06 (A)).

5. If the heat pump is an end node in the network, connect the

three coloured wires to the orange connector as shown for

D in Fig. 06. Connect the correct colours to the L, H and

GND connections as indicated in Table 03 and Fig. 07.

6. If the heat pump is an intermediate node, repeat steps 2

to 5 for a different piece of cable so that two cables are

available with the cable casing removed at one end. Always

plait the two wires with the same colour together and then

connect them to the orange connector as shown for D in

Fig. 06 and in Fig. 08.

7. Use the cable bracket to secure the CAN-bus cable(s) to

the top part of the inside of the electrical panel in such a

way that the cable casing that is folded back is in close

contact with the metal bracket (see Fig. 06 C and F). The

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cables are pulled.

The jumper settings on the control unit depend on the node

type:

T003995-A

A C

Fig. 06 CAN-bus cable connection (end node) on the

printed circuit board for the Gas HP heat pump

A. If the Gas HP heat pump is an end node in the network

(three wires connected to the orange connector on the

control unit), set the jumper as illustrated in Fig. 07.

B. If the Gas HP heat pump is an intermediate node in the

network (six wires connected to the orange connector on

the control unit), set the jumper as illustrated for devices 1

and 2 in Fig. 08.

6.4.3 Connecting the CAN-bus to the CAN-OT interface -

two nodes

Legend

GND Common data

L LOW data signal

H HIGH data signal

0 Zero

S SHIELD (protection)

The CAN-bus cable is connected to the special yellow/green

HL0SFRQQHFWRUWKDWLV¿WWHGLQWKH;FRQQHFWRURIWKH&$1

OT interface.

mWARNING

Make sure the heat pump has been disconnected from the

power supply before starting work on the electrical panel.

1. Open the CAN-OT interface from above by pressing the top

of the cover and carefully pulling it forward.

2. The jumpers on the CAN-OT interface must be set as

indicated in Fig. 07. The CAN/OT interface is an end node.

3. Cut off a piece of cable that is long enough for the

connection without any loops forming.

4. Remove approximately 20 mm of the cable casing and

the wires within it. Make sure you do not cut into the cable

protection (plaited metal or aluminium foil and, if present,

the bare connection in contact with the plait).

5. Disconnect the cable connector from connection HL0S on

connector X2.

6. Connect the cable's shield to connection S on connector

X2.

7. Connect the cable to connector X2 as indicated in Fig. 07.

Pay attention to the marks on the connector where GND

needs to be connected to O.

8. Refasten the cable connector on X2.

T003993-B

On/off

CAN

CAN / OT

S61 P8

X2 X1

Mains

GND L H

Jumper

CN3

Jumper J1

(A)

Fig. 07 Connections on the CAN-OpenTherm interface and

Gas HP printed circuit board (two nodes)

Remeha Gas HP 35 A

(LT/HT)

6.4.4 Connecting the CAN-bus to the CAN-OT interface -

several nodes

Legend

S61 Heat pump printed circuit board

CAN/OT CAN/OT interface

J1 CAN-bus jumper

CN3 CAN-bus jumper

A Addressing jumper interface

P8 CAN-connector

CAN CAN-connector

CAN-OT interfaces 1 + 2 and heat pumps 1 + 2 are

intermediate nodes

CAN-OT interface 0 and heat pump 0 are end nodes

T003991-C

On/off

CAN

CAN / OT

S61

P8 P8 P8

X2 X1

(A) (A) (A)

Mains

On/off

CAN

CAN / OT

S61

X2 X1

Mains

On/off

CAN

CAN / OT

S61

X2 X1

Mains

GND L HGND L HGND LLH

Fig. 08 Connections on the CAN-OpenTherm interface and Gas HP printed circuit board (several nodes)

CAN /

On/of

S61

The following table indicates which jumpers need to be

FRQ¿JXUHGWRJHWKHUZLWKWKHDGGUHVVLQWKHGHYLFH

Unit

address

Jumper 1

position

Jumper 2

position

Jumper 3

position

Jumper 4

position

0 OFF OFF OFF OFF

1 OFF OFF OFF ON

2 OFF OFF ON OFF

3 OFF OFF ON ON

4 OFF ON OFF OFF

5 OFF ON OFF ON

6 OFF ON ON OFF

7 OFF ON ON ON

8 ON OFF OFF OFF

9 ON OFF OFF ON

10 ON OFF ON OFF

11 ON OFF ON ON

12 ON ON OFF OFF

13 ON ON OFF ON

14 ON ON ON OFF

15 ON ON ON ON

Table 04 Address table

6.4.5 LED signals for CAN-OT interface

If several faults occur simultaneously, the LED signalling

will display each fault in order of priority, until the problem is

resolved. The following list shows the order of priority. LED

status 0 has the highest priority.

LED on No errors

OpenTherm and CAN-bus communication

working

/('ÀDVKHV 2x: No OpenTherm communication

3x: No CAN-bus communication

4x: Incorrect CAN-bus address settings

5x: Internal error

6x: CAN device is not supported

LED off No voltage

Faulty

Table 05 LED signals for CAN-OT interface

6.4.6 Setting CAN-bus address on the Gas HP heat pump

In order to operate several heat pumps in a CAN-bus network

combined with CAN-OT interfaces, each heat pump must be

allocated a clear code. This can be done by setting parameter

40 in menu 5 for the heat pumps.

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device in the CAN network. Each heat pump is given a unique

code, independent of its position in the system. The value

that needs to be set for parameter 40 is the numerical code

assigned to the device and can vary from 0 to 478.

Set parameter 40 as follows:

1. Remove the front casing of the heat pump by unscrewing

and removing the screws.

2. Remove the cover plate of the electrical panel to be able to

access the set-up button.

Remeha Gas HP 35 A

(LT/HT)

3. Insert the supplied key in the set-up button to access the

control menus and the parameters.

4. Press the button once to display the available menus; the

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5. Rotate the button clockwise to display the other menus; the

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(

6. Rotate the button to menu 5 to set the CAN-bus address.

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7. Use access code 2222 to access menu 5. Rotate the

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entered the full access code.

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Now enter the CAN-bus address for the heat pump. Rotate

the button to the number to be entered and press to

FRQ¿UP5HSHDWWKLVDFWLRQXQWLOWKHFRPSOHWHDGGUHVVKDV

been entered.

9. Go to menu E and press the button to leave the control

menus.

10. Replace the cover plate for the switch box and the front

casing.

6.4.7 Connecting the Remeha OpenTherm controller

Use two-wire cables to connect each CAN-OT interface to

the OpenTherm (cascade) controller. A simple 2 x 0.5 mm

unprotected cable can be used. OpenTherm is not susceptible

to polarity, so the wires can be swapped.

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Modèle: Fusion and Fusion Hybrid

Catégorie: Pompes à chaleur

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