Auer 6P10 PILOT Manual de usuario

Made in France

Manual réf. : 1898468

N° édition : 22.29

Installation manual 6P10

78 liters - 10 hydraulic outlets

6kW electrical back-up

Ref. 753040

The information contained in this document is non-contractual. Auer reserves the right to modify the technical speciﬁcations or characteristics of any of their appliances without prior notice.

6P10 PILOT

Hydraulic pilot for heat pumps

- 6P10 PILOT MANUAL -

SOMMAIRE

1-SAFETY ............................................................. 4

2 -PLEASE READ IMMEDIATELY......................... 6

2.1 - Conservation of documents ............................................................6

2.2 - Symbols used........................................................................................6

2.3 - Abbreviations and acronyms...........................................................6

2.4 - Delivery terms and conditions........................................................6

2.5 - Storage and transport........................................................................6

2.6 - Unpacking..............................................................................................6

2.7 - Rating plate............................................................................................6

2.8 - End of life of the appliance...............................................................6

3 - INTRODUCTION ............................................. 7

3.1 - General information ...........................................................................7

3.2 - Packaging...............................................................................................7

3.3 - Accessories (included) .......................................................................7

3.4 - Accessories available as optional extras......................................7

3.5 - Operating principles...........................................................................8

4 - INSTALLATION................................................ 8

4.1 - Placement choice.................................................................................8

4.1.1 - Appropriate placement choice............................................................................8

4.1.2 - Fixation......................................................................................................................... 8

4.1.3 - Dimensions.................................................................................................................9

4.2 - Hydraulic installation..........................................................................9

4.2.1 - Recommendations...................................................................................................9

4.2.1.1 - Backow prevention device................................................................. 9

4.2.1.2 - Cross sections, purging of the heating circuits............................. 9

4.2.1.3 - Desludging tank....................................................................................... 9

4.2.1.4 - Preparing the hydraulic circuit (rinsing) .......................................... 9

4.2.1.5 - Insulation of the pipes ...........................................................................9

4.2.1.6 - Expansion vessel ......................................................................................9

4.2.1.7 - Frost protection......................................................................................10

4.2.1.8 - Thermostatic valves...............................................................................10

4.2.1.9 - Treatment of the water in the heating circuit..............................10

4.2.1.9.1 - Filling water..........................................................................10

4.2.1.9.2 - Treatment of the heating circuit...................................10

4.2.1.10 - Installation of the DHW circuit........................................................11

4.2.1.11 - Purging the installation.....................................................................11

4.2.1.12 - Connecting the pressure relief valve............................................11

4.2.1.13 - Filter on the water inlet of each heat pump (supplied).........12

4.2.2 - Hydraulic connections..........................................................................................12

4.2.2.1 - Back-up boiler connection .................................................................12

4.2.2.2 - Distribution circuits connection (DHW/heating)........................13

4.2.2.2.1 - Hydraulic circuits sizing between HRC70 pilot

and water tanks primary coils .......................................13

4.2.2.3 - UPMXL 25-125 circulator for heat pump circuits

and distribution (DHW/heating) ......................................................13

4.2.2.3.1 - Manometric height/Flow rate .......................................13

4.2.2.3.2 - Setting of the circulator pump

on the CP3 constant pressure mode...........................13

4.3 - Electrical connections......................................................................14

4.3.1 - Power electrical connections .............................................................................14

4.3.2 - Prior recommandations before power electrical connections ..............14

4.3.3 - Power electrical connection of the pilot..................................................................14

4.3.4 - Power connection of the HRC70 heat pump ........................................................15

4.3.5 - Control connection of the heat pump............................................................15

4.3.6 - Cascade of heat pumps........................................................................................16

4.4 - Connection of circuits and accessories......................................17

4.4.1 - Room thermostat ...................................................................................................17

4.4.2 - Exterior sensor.........................................................................................................17

4.4.3 - Domestic water aquastat.....................................................................................17

4.4.4 - Domestic water sensor.........................................................................................17

5 - SET-UP........................................................... 18

5.1 - Before set-up............................................................................................................... 18

5.2 - Check watertightness.......................................................................18

5.3 - Starting set-up ....................................................................................18

5.3.1 - Step 1 : Number of heat pump..........................................................................18

5.3.2 - Step 2 : Circuits choice..........................................................................................18

5.3.3 - Step 3 : Filling...........................................................................................................19

5.3.4 - Step 4 : Purging the installation........................................................................19

5.3.6 - Step 6 : Finishing set-up.......................................................................................19

5.3.5 - Step 5 : Choosing the back-up...........................................................................19

5.4 - First use..................................................................................................19

6 - SETTINGS AND FUNCTIONS .......................20

6.1 - Control panel.......................................................................................20

6.1.1 - Keypad........................................................................................................................20

6.1.2 - Display........................................................................................................................20

6.2 - Menus ....................................................................................................21

6.3 - Actions to be activated using a combination of buttons....21

6.4 - List of parameters which can be set ..........................................22

6.5 - Description of functionalities........................................................25

6.5.1 - Functions related to heating..............................................................................25

6.5.1.1 - AUTO temperature (heat curve) .......................................................25

6.5.1.2 - Lowering of the temperature ............................................................25

6.5.1.3 - Auto-adaptability...................................................................................25

6.5.1.4 - Ambient temperature reactivity.......................................................25

6.5.2 - Programming and timeout functions.............................................................25

6.5.2.1 - Anticipation of return from holiday................................................25

6.5.2.2 - Automatic summer/winter changeover................................................................26

- 6P10 PILOT MANUAL -3

6.5.3 - Ambient temperature and heating circulation control functions ........26

6.5.3.1 - Ambient temperature sensor hysteresis........................................26

6.5.3.2 - Circulator pump speed........................................................................26

6.5.3.3 - Heating circulator control...................................................................26

6.5.3.4 - Anti-cold radiators.................................................................................26

6.5.4 - Functions related to the production of domestic hot water ..................26

6.5.4.1 - Domestic priority sharing ...................................................................26

6.5.4.2 - Anti-legionellosis protection.............................................................26

6.6 - Heat pump circulator speed..........................................................26

7 - MAINTENANCE AND TROUBLESHOOTING...27

7.1- Diagnostics............................................................................................27

7.1.1 - Loading the operating history...........................................................................27

7.1.2 - Consulting the current operating state of the system..............................27

7.1.3 - Water sensors...........................................................................................................28

7.1.4 - Exterior sensor.........................................................................................................28

7.1.5 - Consulting the counters.......................................................................................28

7.1.6 - Manual forcing of components.........................................................................28

7.1.6.1 - Circulator pump .....................................................................................28

7.1.6.2 - Electrical back-up...................................................................................28

7.1.6.3 - Back-up boiler .........................................................................................28

7.1.7 - Errors indicated by the pilot...............................................................................29

8 - SPARE PARTS ................................................32

9 - WARRANTY ................................................... 33

9.1 - Warranty coverage ............................................................................33

9.2 - Limitations of warranty....................................................................33

9.2.1 - General information ..............................................................................................33

9.2.2 - Cases (not limited to) for exclusion from warranty ....................................33

9.2.2.1 - Usages........................................................................................................33

9.2.2.2 - Handling....................................................................................................33

9.2.2.3 - Installation site........................................................................................33

9.2.2.4 - Electrical connections ..........................................................................33

9.2.2.5 - Hydraulic connections .........................................................................33

9.2.2.6 - Accessories...............................................................................................33

9.2.2.7 - Maintenance...........................................................................................33

APPENDIX ..........................................................34

A1 - Technical specications....................................................................34

A1.1 - General characteristics...........................................................................................34

A1.2 - UE declaration...........................................................................................................34

A1.3 - Dimensions.................................................................................................................34

A2 - Schémas de principe hydraulique................................................35

A2.1 - CASE n°1 - 1 HRC70 heat pump + 1 heating circuit.....................................36

A2.2 - CASE n°2 - 1 HRC70 heat pumps + 2 heating circuits..................................37

A2.3 - CASE n°3 - 1 HRC70 heat pump + 1 DHW tank + 1 heating circuit......38

A2.5 - CASE n°5 - 1 HRC70 heat pumps + 2 DHW tanks + 1 heating circuit ..39

A2.6 - CASE n°6 - 1 HRC70 heat pumps + 1 DHW tank..........................................40

A2.7 - CASE n°7 - 1 HRC70 heat pumps + 2 DHW tanks........................................41

A2.8 - CASE n°8 - 1 HRC70 heat pumps + 3 DHW tanks........................................42

A2.9 - CASE n°9 - 2 HRC70 heat pumps + 1 heating circuit..................................43

A2.10 - CASE n°10 - 2 HRC70 heat pumps + 2 heating circuits...........................44

A2.11 - CASE n°11 - 2 HRC70 heat pumps + 3 heating circuits...........................45

A2.13 - CASE n°13 - 2 HRC70 heat pumps + 1 DHW tank

+ 1 heating circuit .................................................................................................46

A2.16 - CASE n°16 - 2 HRC70 heat pumps + 2 DHW tanks

+ 1 heating circuit ..................................................................................................47

A2.18 - CASE n°18 - 2 HRC70 heat pumps + 1 DHW tank......................................48

A2.19 - CASE n°19 - 2 HRC70 heat pumps + 2 DHW tanks....................................49

A2.20 - CASE n°20 - 2 HRC70 heat pumps + 3 DHW tanks....................................50

A2.22 - CASE n°22 - 3 HRC70 heat pumps + 1 heating circuit.............................51

A2.23 - CASE n°23 - 3 HRC70 heat pumps + 2 heating circuits...........................52

A2.24 - CASE n°24 - 3 HRC70 heat pumps + 3 heating circuits...........................53

A2.25 - CASE n°25 - 3 HRC70 heat pumps + 1 DHW tank......................................54

A2.26 - CASE n°26 - 3 HRC70 heat pumps + 2 DHW tanks....................................55

A2.27 - CASE n°27 - 3 HRC70 heat pumps + 3 DHW tanks....................................56

A3 - Wiring diagram....................................................................................57

A4 - Recap of functions .............................................................................58

A4.1 - Control panel............................................................................................................58

A4.1.1 - Keypad........................................................................................................58

A4.1.2 - Display........................................................................................................58

A.4.2 - Menus.........................................................................................................................59

A.4.3 - Actions through key combinations.................................................................59

- 6P10 PILOT MANUAL -

Danger of death if the pressure relief valves

are missing or defective

A defective pressure relief valve may prove

dangerous and could lead to burns or other

injuries by, for example, the pipes bursting.

The information presented in this document does

not contain all of the schematic diagrams needed

for a professional installation of the pressure relief

valves.

• Install the necessary pressure relief valves on

the circuit.

• Inform the user concerning the function and

the placement of the pressure relief valves.

• Respect all applicable national and international

regulations, standards and decrees.

Risk of corrosion

The appliance should be installed in an area

where it is not exposed to humidity and without

any risk of being splashed by water.

Risk of damage related to frost

The pilot MUST be installed in an area where it is

not subject to frost or freezing.

Risk of material damage

The pilot can only work when lled with water.

Never switch on the appliance if it is not

completely lled with water and purged of air.

Rules and regulations (decrees, standards,

laws)

Once the appliance is installed and switched

on, all decrees, directives, technical rules, safety

measures and standards, must be respected in

their current version in eect.

The electrical supply must conform to all

applicable regulations in the country of

installation, as well as the NFC 15-100 standard.

• A methodofdisconnection ensuringa complete

cut-o must be installed in the xed piping to

conform to installation regulations (do not use

a movable outlet).

•Protect the appliance with a 2-pole circuit

breaker with a minimum contact opening of

3mm and must be grounded.

If the electrical supply cable is damaged, it must

be replaced by the manufacturer, their customer

service technicians, or by a qualied professional

to prevent any risk of injury or danger.

• The devices for electrical cut-o must remain

accessible.

•Water and/or R290 ammable gas can ow

through the discharge pipe of the pressure

limiting device (safety valve). This pipe must

be kept open outside the building. The end

of this pipe must be placed downwards

(see § Connecting the pressure relief valve).

1-SAFETY

Danger resulting from improper qualications

• Any work carried out by an unqualied person

can result in damage to the installation or in

physical injury.

• Do not perform maintenance on this appliance

unless you are a qualied professional.

• If the appliance is malfunctioning or not

working, cut the electricicty supply to the

electrical components and seek advice from a

qualied professional.

Danger resulting from improper use

This appliance should not be used by anyone

(including children under the age of 8 years

old)with reduced physical, sensory or mental

capabilities, or by anyone with insufficient

experience or knowledge of the appliance; unless

they are being supervised by someone who is

responsible for their safety and in possession of

the operating instructions of the appliance, or if

they have been instructed in the proper use and

in the risks of operating the appliance.

Children must not play with the appliance.

Cleaning and maintenance of the appliance

must not be undertaken by children without

supervision.

Applicable areas of use

The appliance is intended for use an appliance

for the production of domestic hot water: it must

be connected to a heating installation, and while

complying with the instructions, connected to

the drinking water network.

The intended use of the appliance includes the

following points:

•Following the instructions for operating,

installing and maintaining this appliance and

all of its components.

• Ensuring the compliance of the appliance to all

inspection and maintenance conditions which

are listed in this manual.

Danger of death by electrocution

• Touching live electrical wires can cause severe

bodily injury, and lead to death by electrocution.

All installation and maintenance work must be

carried out with the appliance switched o and

by a qualied professional. Before carrying out

any work on the appliance:

-Cut-o the electricity supply.

- Ensure that there is no possibility of the power

supply becoming active again.

-Wait at least 5 minutes for the capacitors to

lose their charge.

• Do not get water on any of the control or

electrical components. Always disconnect the

appliance from the electricity supply before

carrying out work on any of the electrical

components.

- 6P10 PILOT MANUAL -5

Maintenance - Troubleshooting

Maintenance and cleaning of the pilot must be

carried out at least once a year by a qualied

professional.

This appliance is in compliance with the

international standards concerning electrical

safety CEI 60335-1, CEI 60335-2-102. The

CE branding on the appliance attests to its

compliance with the following directives:

- Low voltage (LV): 2014/35/UE

- Electromagnetic compatibility(CEM):

2014/125/CE

- Ecodesign concerning products related to

energy: 2013-813-UE

- 6P10 PILOT MANUAL -

2 -PLEASE READ

IMMEDIATELY

This technical installation manual forms part of the appliance which

it refers to. In order for the warranty to be valid, the instructions must

be read prior to using the appliance.

The safety advice and instructions provided in this manual must be

strictly respected.

Our society is not liable for any damages caused from not following

the instructions provided, or improper handling, installation or use.

This technical installation manual can be modied without prior

notice.

This manual must be safeguarded and passed on to successive users

for future reference.

It will be considered as evidence in case of litigation.

2.1 - Conservation of documents

DHW.......Domestic Hot Water

DCW .......Domestic Cold Water

T°..............Temperature

HP............Heat pump

2.3 - Abbreviations and acronyms

2.4 - Delivery terms and conditions

In general, the material is transported at the recipient’s own risk.

It is important to ensure that all components have been received and

that no damage has been sustained during transport upon receipt

of the appliance, and before beginning the installation procedures

Indicates warnings and important recommendations.

2.2 - Symbols used

Contains regulated substances, do not throw in the

garbage. If disposing, please respect all regulations

pertaining to the recovery of electric and electronic

equipment.

Maximum working pressure.

PSmax

Consult the installation manual before any intervention

on the product, before handling, installation, use , and

maintenance.

Heat power output produced.

Indicates the maximum water temperature in operation.

Admissible storage and transport temperatures are from -20°C to

+60°C.

The 6P10 Pilot must be stored on its original pallet. It must be

transported on its pallet, empty of water, horizontally. It must remain

screwed to the pallet during the transport.

2.5 - Storage and transport

2.6 - Unpacking

On reception of the Pilot, check the state of the packaging as well

as the general state of the product.

Then, take o the plastic protection and unscrew the pilot from its

pallet.

The pilot is screwed with 4 woodscrews at the bottom and at the

top at plates level.

2.8 - End of life of the appliance

Our products are designed and manufactured using

components made of recyclable materials.

The appliance must never, in any case, be disposed

of with household waste, or in a dump.

The dismantling and recycling of the appliances

must be taken charge of by a qualied professional

and in compliance with all local and national

standards in eect.

2.7 - Rating plate

Rating plate

- 6P10 PILOT MANUAL -7

3.2 - Packaging

Weight

(kg)

Number

packages

(mm)

6P10 67 - 800 686 1600

Each Pilot is delivered with (non-mounted) :

• Exterior sensor

Gives the pilote the outside temperature to

adapt its heating set point

• USB memory stick

Allows downloading of the operating

history

Ensure to keep the original delivered USB ash drive.

It will facilitate your exchanges with your technical contacts.

3.3 - Accessories (included)

3 - INTRODUCTION

6P10 is a hydraulic pilot which ensures working installations with

high power heat pumps. Its integrated tank ensures the decoupling

of the heat pumps circuits as well as the air bleeding and the

evacuation of the sludges.

If the required installation power is higher than the delivered power

by the heat pump, the 6kW electrical back-up or the boiler back-up

can be started by the pilot.

6P10 pilot is equipped with :

- One 78 liters wall tank with air bleed, pressure sensor, pilot

sensor, 6kW electrical back-up, 6bars pressure relief valve and

settling valve.

- One electronic control ensuring the working of the installation.

Optional distribution branches can be added (up to 2 branches) for

installation including several circuits or heat pumps :

- up to 3 heat pumps and 1 distribution circuit

- up to 3 sanitary circuits and 1 heat pump

- 1 heating circuit

The distribution branches dedicated to heat pumps ensure the

circulation in HRC70 25kW, HRC70 32kW or less power heat pumps.

They must not be connected in the case of heat pumps which have

their own circulator (HRC70 40kW or higher power).

3.1 - General information

• DHW sensor (for water tanks connected as circuits

1 et 2)

For the production of domestic hot water

(

Réf. 710029)

• DHW aquastat (for water tank connected as circuit

For the production of domestic hot water

(Réf. 752202)

3.4 - Accessories available as optional

extras

• Ambient temperature thermostat radio non-

chronoproportional -(THRnc)-

(on/o type). Wireless, programmable thermostat,

transmitting through radio-frequency. Necessary when a wired

connection between the Pilot and the ambient temperature

thermostat is not possible

(

Ref.770001)

• Hydraulic distribution branch

(Ref. 755823)

• Shielded bus wire - 20 m long

(

Réf. 753102)

• Shielded bus wire - 50 m long

(

Réf. 754103)

• Additional multi-circuit box

For adding circuits of the same type

(

Réf. 754104)

• Ambient temperature thermostat (TA)

2 wires - allows to control the temperature in

the heating zone

(

Ref. 710043)

- 6P10 PILOT MANUAL -

1. 78L buer tank

2. Heat pump circulator pump

(except for HRC70 40kW)

3. Distribution circuit

circulator pump

4. 6kW electrical back-up

5. Electronic control

6. Power electronic card

7. Distribution circuit

8. Drain

9. Heat pump circuit

3.5 - Operating principles

4 - INSTALLATION

4.1 - Placement choice

4.1.1 - Appropriate placement choice

The Pilot must be placed in an area which is free from frost and

adverse weather conditions.

It must be placed as close as possible to the heat pump without

exceeding the maximum distance.

The maximum distance depends on the diameter of piping and the

number of elbows used (see «Hydraulic connection» tables).

The 2-core sheathed cable which connects the Pilot and the heat

pump is 10m long. There is a 20m length available as an optional

extra (Ref. 753102) or 50m (Ref. 754103).

The Pilot must be installed on a level

and stable base which is distanced from

appliances used for cooking and other heat

sources.

The Pilot lled with water can be heavy, watch

over the resistance of the wall stand.

The pilot must be xed on a resistant wall.

4.1.2 - Fixation

- 6P10 PILOT MANUAL -9

4.1.3 - Dimensions

The pilot must be placed at least 200mm above the oor or any

obstacle the enable it to be drained.

It must be placed at least 400mm under the ceiling to facilitate

the access to the air bleed and to the electrical back-up. 4.2.1 - Recommendations

A type CB backflow prevention device may be installed. This

device must be at dierent, non-regulated pressure zones. Check

your national laws and regulations to know if this is an obligatory

requirement. The backflow prevention device is designed to

prevent incoming heating water from entering the drinking water

circuit. It must be connected to the mains drainage system.

4.2.1.1 - Backow prevention device

A sucient ow rate should be ensured so that the dierence in

temperature between the outlet and inlet points does not exceed

6°C. In an installation equipped with thermostatic mixing valves, this

inspection must be done with all taps/valves open.

The output actually needed determines the water ow rate of

the heating circuit and allows to calculate the dimensions of the

distribution network.

Adapt the speed of the circulator pump to the hydraulic

characteristics using the ow rate/pressure curve provided.

All necessary measures must be taken to ensure that the installation

can be continuously purged. Automatic air purging valves should be

placed at each high point of the installation, and manual air purging

valves should be installed on each radiator.

4.2.1.2 - Cross sections, purging of the

heating circuits

4.2 - Hydraulic installation

Consult the hydraulic schematic diagrams in the appendix.

Plan for a desludging tank with a suicient volume at a low point

on the inlet of the heating circuit. This tank must be equipped

with a drain so it can collect the oxides, particles, and calamines

which detach from the inner walls of the heating circuit while it is

in operation.

4.2.1.3 - Desludging tank

Before placing the pilot and heat pump, it is necessary to rinse the

installation with an appropriate product.This allows to eliminate all

traces of soldering waste, joint ller, grease, sludge, metallic particles,

etc... in the radiators, underoor heating, etc...

4.2.1.4 - Preparing the hydraulic circuit

(rinsing)

4.2.1.5 - Insulation of the pipes

Insulators must be in accordance with DTU 67.1.

All the apparent pipes and accessories (circulator, expansion vessel,

valve, ...) must be insulated or placed in insulated box.

4.2.1.6 - Expansion vessel

The installation must be equipped with an expansion vessel with

a sucient capacity (which depends on the static height of the

installation, the blowing-up pressure of the expansion vessel and

the volume of the installation)

- 6P10 PILOT MANUAL -

It is IMPERATIVE to refer to the

installation instructions for the initial

installation of the ambient temperature

thermostat to ensure satisfactory operation.

In an installation with both

thermostatic valves and a room

temperature thermostat, the radiator(s) in

the room in which the thermostat is located

MUST be equipped with a manual valve(s).

Thermostatic valves: these valves should prioritise rooms with

higher levels of heat gain.

4.2.1.8 - Thermostatic valves

4.2.1.9 - Treatment of the water in the

heating circuit

It is MANDATORY to read the additional

document concerning the quality of

water used for lling the installation.This

document is included with this manual as well as

in the packet with the warranty information.

This document also contains information which is

PERTINENT to the WARRANTY of the material.

Central heating installations must be cleaned

in order to eliminate debris (copper, lings,

soldering waste) related to the set-up of the

installation or from chemical reactions between the

metals.

Futhermore, it is important to protect the

central heating installations from risks of

corrosion, limescale, and microbiological

development through use of a corrosion inhibitor

which is suitable for all kinds of installations (steel or

cast-iron radiators, PEX underoor heating).

PRODUCTS USED FOR HEATING WATER

TREATMENT MUST BE APPROVED BY THE

LOCAL OR NATIONAL PUBLIC HYGIENE

AND HEALTH AUTHORITY.

4.2.1.9.1 - Filling water

The materials used for producing a heating circuit are of dierent

natures. Instances of corrosion may occur through galvanic coupling

in both new and existing installations.

The lling of the heating circuit must only be done with untreated water

(no water softener) from the drinking water network. Water from any other

source )rain-water, well-water, etc...), must be analysed and MUST have

the following properties:

8,5 UPH (acidity) U9,5

Chlorides U60 mg / litre

Conductivity < 1000 μS / cm

5 UTH (hardness in French °) U15

We recommend the use of products in the SENTINEL range by GE

BETZ for preventative and curative treatment of the heating circuit.

• For new installations : (less than 6 months old):

- Clean the installation with a universal cleaner to eliminate

the debris from the installation (copper, bres, soldering

uxes) Example : SENTINEL X300

- Throughly rinse the installation until the water runs clear,

with no traces of impurities left.

- Protect the installation against corrosion with a corrosion

inhibitor, example: SENTINEL X100. Or against corrosion

and freezing with an inhibitor with an anti-freeze additive.

Example :SENTINEL X500.

• For existing installations:

- Desludge the installation with a desludging product

to eliminate any sludge from the installation. Example:

SENTINEL X400.

- Throughly rinse the installation until the water runs clear,

with no traces of impurities left.

- Protect the installation against corrosion with a corrosion

inhibitor, example: SENTINEL X100. Or against corrosion

and freezing with an inhibitor with an anti-freeze additive.

Example : SENTINEL X500.

4.2.1.9.2 - Treatment of the heating circuit

Corrosion inhibitor :

- protects against the formation of limescale

- prevents «pinhole» type corrosion

- prevents, in new installations, the formation of sludge

and the proliferation of bacteria

(in low temperature networks: algae)

- prevents the formation of hydrogen

- eliminates the sound of the generators

Treatment products from other manufacturers can be used if they

guarantee that the product is appropriate for all the materials used

in the appliance and oers ecient resistance to corrosion. To nd

this information refer to their user manual.

Frost protection is necessary if the pilot is switched o during the

winter months (ex: secondary residence, etc...).

4.2.1.7 - Frost protection

If the appliance is connected to an

electricity supply, the heating circuit is

protected from freezing. It is IMPERATIVE

to drain the domestic hot water circuit however.

If the pilot is not being supplied with electricity

(electrical cut-o for example), or it is defective

and there is a risk of freezing, it is IMPERATIVE to

completely drain the appliance (heating and hot

water).

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