Alpha innotec drinking water station Owner's manual

Brand: Alpha innotec

Model: drinking water station

Type: Owner's manual

Alpha innotec drinking water station

The Alpha innotec drinking water station is a compact, preassembled unit that provides hot water for domestic use. It is a continuous flow system, meaning that it heats water as it flows through the unit, rather than storing it in a tank. This makes it a more efficient option than traditional hot water tanks, as it only heats the water that you need, when you need it.

The drinking water station has two hydraulic circuits: a primary circuit that connects to a storage tank or heat pump, and a secondary circuit that provides the hot water to your taps. The primary circuit water is heated by the storage tank or heat pump, and then flows through a plate heat exchanger, where it transfers its heat to the secondary circuit water. The secondary circuit water is then sent to your taps, where it can be used for drinking, cooking, or bathing.

Alpha innotec drinking water station

We reserve the right to modify technical specications without prior notice.

83033000eUK – Translation of the original operating manual

Operating Manual

Decentralised

drinking water station

for combination with a heat pump

Contents

INFORMATION FOR USERS AND

QUALIFIED PERSONNEL

PLEASE READ FIRST ....................................................................................................2

SYMBOLS ........................................................................................................................2

FUNCTIONAL PRINCIPLE .......................................................................................... 3

INTENDED USE .............................................................................................................3

DISCLAIMER ...................................................................................................................3

SAFETY .............................................................................................................................3

CUSTOMER SERVICE ................................................................................................... 3

WARRANTY / GUARANTEE ......................................................................................3

DISPOSAL........................................................................................................................3

OPERATION .................................................................................................................... 3

CARE OF THE UNIT ......................................................................................................3

MAINTENANCE OF THE UNIT .................................................................................3

INSTRUCTIONS FOR QUALIFIED PERSONNEL

SCOPE OF SUPPLY .......................................................................................................4

Installation and assembly ..................................................................................4

Connection to the pipe system .......................................................................5

COMPONENTS .............................................................................................................. 5

Proportional controller .......................................................................................5

Heat meters ............................................................................................................5

Temperature maintenance ...............................................................................6

Domestic hot water mixing valve ..................................................................6

FLUSHING, FILLING AND VENTING ......................................................................6

Heating circuit .......................................................................................................6

Domestic hot water circuit ................................................................................8

INSULATING THE HYDRAULIC CONNECTIONS ............................................... 8

DISMANTLING ..............................................................................................................8

TECHNICAL DATA ........................................................................................................9

PERFORMANCE CURVES ...........................................................................................9

DIMENSIONED DRAWINGS ...................................................................................10

83033000eUK– Translation of the original operating manual – We reserve the right to make technical changes without notice.

Please read rst

This operating manual provides important information on handling the

unit. It is an integral part of the product and must be stored so that it is

accessible in the immediate vicinity of the unit. It must remain available

throughout the entire service life of the unit. It must be handed over to

subsequent owners or users of the unit.

Read the operating manual before working on or operating the

unit. Especially the chapter on safety. Always follow all instructions

completely and without restrictions.

This operating manual possibly contains descriptions that seem

incomprehensible or unclear. In the event of any questions or if any

details are unclear, contact the factory customer service department or

the manufacturer's local partner.

Since this operating manual was written for several dierent models of

the unit, always comply with the parameters that apply to the respective

model.

This operating manual is intended only for persons assigned to work

on or with the unit. Treat all constituent parts condentially. They are

protected by copyright. They may not be reproduced, transmitted,

copied, stored in electronic systems or translated into another language,

either wholly or in part, without the express written permission of the

manufacturer.

Symbols

Information for users.

Information or instructions for qualied personnel.

DANGER!

Risk of fatal electric shock!

DANGER!

Indicates a direct impending danger resulting in severe injuries or death.

WARNING!

Indicates a potentially dangerous situation that could result in serious

injuries or death.

CAUTION!

Indicates a potentially dangerous situation that could result in moderate

or slight injuries.

ATTENTION

Indicates a potentially dangerous situation, which could result in

property damage.

NOTE

Emphasised information.

€

ENERGY SAVING TIP

Indicates suggestions that help to save energy, raw materials

and costs.

383033000eUK– Translation of the original operating manual – We reserve the right to make technical changes without notice.

Reference to other sections of the operating manual.

Reference to other documents of the manufacturer.

Functional principle

Compact, preassembled assembly with two hydraulic circuits, which

transfers the heat from the primary circuit from a storage tank via a plate

heat exchanger to the continuously owing domestic hot water circuit

(secondary).

Intended use

Drinking water station for domestic water heating using the continuous

ow principle.

Operate the unit only within its technical parameters.

“Technical Data / Scope of Supply” overview.

Disclaimer

The manufacturer is not liable for losses resulting from any use of the

unit which is not its intended use. The manufacturer's liability also

expires:

•

if work is carried out on the unit and its components contrary to the

instructions in this operating manual.

•

if work is improperly carried out on the unit and its components.

•

if work is carried out on the unit which is not described in this

operating manual, and this work has not been explicitly approved

by the manufacturer in writing.

•

if the unit or components in the unit have been altered, modied or

removed without the explicit written consent of the manufacturer.

Safety

The unit is safe to operate for its intended use. The construction and

design of the unit conform to current state of the art standards, all

relevant EN regulations and all relevant safety regulations.

Every person who carries out work on the unit must have read and

understood the operating manual before starting any work. This also

applies if the respective person has already worked with such a unit or a

similar unit or has been trained by the manufacturer.

WARNING!

Only qualied personnel (trained heating, refrigeration engineers)

may carry out work on the unit and its components.

Customer service

For technical information please contact your tradesman or the

manufacturer's local partner.

“Customer service” overview in the heat pump operating

manual.

Warranty / Guarantee

For warranty and guarantee conditions, please refer to the purchase

documents.

Contact the responsible dealer regarding all warranty and guarantee

matters.

Disposal

When withdrawing the old unit from service, comply with the relevant

local laws, guidelines, directives and standards concerning recovery,

reuse, recycling and disposal.

see “Dismantling", page 8

Operation

Pay particular attention to the following, to ensure that your domestic

hot water station operates eciently and in an environmentally friendly

way:

€

ENERGY SAVING TIP

Do not set the domestic hot water temperature at the

thermostatic mixing valve higher than necessary. The

unit operates most eciently at low domestic hot water

temperatures (≈ 45 °C).

Do not set the heating water temperature in the storage tank

higher than necessary.

For limits of use see “Technical data", page 9

Care of the unit

You can clean the outer surfaces of the unit with a damp cloth and

proprietary household cleaning products.

Do not use cleaning or care products that contain abrasives, acids and/

or chlorine. Such products would irreparably damage the surfaces and

could also cause technical damage to the unit.

Maintenance of the unit

The drinking water station does not need any regular maintenance.

In areas with hard water the heat exchanger can fur up.

CAUTION!

Unit components may be cleaned and ushed only by customer

service personnel authorized by the manufacturer. Use only liquids

recommended by the manufacturer.

After ushing the heat exchanger with chemical cleaning

agent, any residues must be neutralised and the system ushed

intensively with water. Always note and follow the technical data of

the respective heat exchanger manufacturer.

4 83033000eUK– Translation of the original operating manual – We reserve the right to make technical changes without notice.

Scope of supply

Compact, preassembled decentralised hot drinking water station, with

proportional controller, dierential pressure controller, thermostat valve

for maintaining the temperature, thermostatic mixing valve and plate-

type heat exchanger.

Check the delivery for outwardly visible signs of damage.

Check to make sure that the delivery is complete.

Any defects or incorrect deliveries must be reported immediately.

Dispose of the transport and packaging materials properly and under

ecological aspects.

ATTENTION

Use only the original accessories of the unit manufacturer.

1 Bleed valve

2 Plate heat exchanger

3 Dierential pressure controller

4 Option for installing heat meter, installation section 110 mm, 3/4"

(meter not included in scope of supply)

5 Temperature maintaining valve, heating circuit

6 Installation option for heat meter sensor

7 Stopcocks

8 Installation option for cold water meter (meter not included in

scope of supply)

9 Flow restrictor disc 15 l/min (installed) ,

18 l/ min and 12 l/min (enclosed in a bag in the housing of the

domestic hot water station)

10 Proportional controller

11 Thermostatic mixing valve

ALSO INCLUDED:

Flow restrictor discs (2), 1 gasket

Transport to installation location

To prevent transport damage, leave the packaging on until the drinking

water station has been moved to its place of installation.

INSTALLATION AND ASSEMBLY

Always comply with the applicable local accident prevention regulations,

statutory regulations, guidelines and directives.

ATTENTION

Install the domestic hot water station only in a dry and frostproof

location, xed to a wall suitable for carrying the weight of the drinking

water station.

It may be installed in dry walling stud sections or solid (reinforced

concrete or masonry) structures. The minimum installation depth

required is 110mm.

Remove the front panel and frame trim.

Use lag bolts (not included) to x the drinking water station in the

wall.

Mounting options:

583033000eUK– Translation of the original operating manual – We reserve the right to make technical changes without notice.

CONNECTION TO THE PIPE SYSTEM

Dirt and deposits in the heating circuit and domestic hot water circuit

can cause malfunctions. Flush pipes thoroughly before connecting the

domestic hot water station.

ATTENTION

During the connection work, secure the unit's connections against

twisting, in order to protect the pipes and ball valves from damage.

1 Cold water –

inlet 3/4ʺ IG

2 Domestic hot

water – outlet

3/4ʺ IG

3 Cold water –

outlet 3/4ʺ IG

4 Heating water

– outlet 3/4ʺ IG

5 Heating water

– inlet 3/4ʺ IG

Components

PROPORTIONAL CONTROLLER

- The proportional controller controls the heating water ow rate,

which is required to heat the domestic hot water.

– In heat pump mode the proportional

controller should be set to “maximum”

(red dot).

– To maintain a nominal delivery

temperature of 45 °C, the cold water

ow must be limited as follows:

– Heating water in the storage tank

50°C > 12 l/min

– Heating water in the storage tank

55°C> 15 l/min

– Heating water in the storage tank

60°C > 18 l/min

Flow restrictor disc:

The domestic hot water ow can be limited by using ow restrictor discs

(supplied) at the cold water inlet in the proportional controller (installed

15l/h).

HEAT METERS

– The heat meter sections can receive heat meters installed on site

(110mm x 3/4ʺ AG).

– The heat meter sensors are installed in the sensor pockets of the

stopcocks.

– We recommend the use of ultrasonic heat meters, as these have low

pressure losses.

6 83033000eUK– Translation of the original operating manual – We reserve the right to make technical changes without notice.

DIFFERENTIAL PRESSURE CONTROLLER

– Dierential pressure controller for maintaining the dierential

pressure in the heating water during large load changes

–

Continuously adjustable from 50 to 300 mbar (preset in the factory)

–

To maintain the given performance specications the dierential

pressure must be set to “maximum” (300 mbar factory setting)

TEMPERATURE MAINTENANCE

– Temperature limiting valve for maintaining the heating water ow

temperature at the domestic hot water station inlet (should be

slightly above the set delivery temperature).

– Continuously adjustable temperature setting

DOMESTIC HOT WATER MIXING VALVE

– Thermostatic mixing valve for thermostatic control of the delivery

temperature

– Continuously adjustable temperature setting from 35°C to 60°C

– The recommended delivery temperature of 45°C

– If the temperature is higher there is a risk of scalding

– If the temperature is higher there is a risk of the plate-type heat

exchanger furring up

Flushing, lling and venting

ATTENTION

The system must be absolutely free from air before commissioning.

HEATING CIRCUIT

WATER QUALITY FOR THE FILL AND MAKE-UP WATER ACCORDING

TO VDI 2035 PART I AND II IN HOT WATER HEATING SYSTEMS

Use of modern, energy-ecient heat pump systems is becoming

increasingly widespread. Their ingenious technology enables these

systems to achieve very good eciencies. The decreasing space available

for heat generators has led to the development of compact units with

increasingly smaller cross-sections and high heat transfer capacities. This

means the complexity of the systems and the material diversity are also

increasing, which plays an important role especially in their corrosion

behaviour. We ensure continuous technological advances, but all these

technical renements require the system to be operated with correctly

lled heating water. The heating water not only aects the eciency

of the system, but also the life of the heat generator and the heating

components of a system.

The guide values of VDI 2035 Part I and Part II must therefore be complied

with as minimum requirements for proper operation of the systems. Our

practical experience has shown that the safest and most trouble-free

running of the systems is achieved with so-called low-salt operation.

VDI 2035 Part I gives important information and recommendations

regarding scaling and its prevention in heating and domestic hot water

heating systems.

VDI 2035 Part II primarily deals with the requirements for reducing

heating water corrosion in hot water heating systems.

PRINCIPLES OF PART I AND PART II

The occurrence of scaling and corrosion damage in hot water heating

systems is low, if

– proper planning and commissioning is carried out

– the system is closed in corrosion terms

– adequately dimensioned pressurising is integrated

– the guide values for the heating water are complied with

– and regular servicing and maintenance are carried out.

A system log should be kept, in which the relevant planning data is

entered (VDI 2035).

DAMAGE THAT CAN OCCUR IN CASE OF NON-COMPLIANCE

– Malfunctions and the failure of components (e.g. pumps, valves)

– Internal and external leaks (e.g. from heat exchangers)

– Cross-section reduction and blockage of components (e.g. heat

exchanger, pipes, pumps)

– Material fatigue

– Gas bubbles and gas cushion formation (cavitation)

– Negative eect on heat transfer (formation of coatings, deposits) and

associated noises (e.g. boiling noises, ow noises)

783033000eUK– Translation of the original operating manual – We reserve the right to make technical changes without notice.

LIMESCALE – THE ENERGY KILLER

Filling with untreated drinking water inevitably leads to the precipitation

of all calcium as scale. The consequence: limescale deposits form on the

heat transfer surfaces of the heating. The eciency falls and the energy

costs rise. A rule of thumb is that 1 millimetre of limescale deposit causes

an energy loss of 10%. In extreme cases it can even cause damage to the

heat exchangers.

WATER SOFTENING TO VDI 2035 – PART I

If the water is softened before the heating is lled, in accordance with the

VDI 2035 guidelines, no scale can form. This eectively and permanently

prevents limescale deposits and the resulting negative eects on the

entire heating system.

CORROSION – AN UNDERESTIMATED PROBLEM

VDI 2035, Part II, deals with the problem of corrosion. Softening the

heating water can prove to be insucient. The pH value can signicantly

exceed the limits of 10. pH values higher than 11 can set in, which

even damage rubber seals. The VDI 2035, Part 1 guidelines are indeed

fullled, but, VDI 2035, Part 2 prescribes a pH value between 8.2 and

maximum10.

If aluminium materials are used, which is the case in many modern

heating systems, a pH value of 8.5 must not be exceeded, because

otherwise there is a threat of corrosion – and aluminium is attacked

without the presence of oxygen. Therefore, apart from softening the

heating ll and additional water, the heating water should also be

appropriately conditioned. This is the only way to comply with the

VDI 2035 requirements and the recommendations and installation

instructions of the heat pump manufacturer.

Part 2 of VDI 2035 also points out the reduction in total salt content

(conductivity). The risk of corrosion is far lower if deionised water is used

than is the case if the system is operated with salty, i.e. softened water.

Even if drinking water has been softened beforehand, it contains

dissolved, corrosion-promoting salts, which act as electrolytes due to the

use of dierent materials in the heating system and therefore accelerate

corrosion processes. This can ultimately result in pitting.

ON THE SAFE SIDE WITH LOW-SALT OPERATION

The problems listed above do not occur at all with low-salt operation,

as the heating water contains neither corrosive salts such as sulphates,

chlorides and nitrates nor alkalising sodium hydrogen carbonate. The

corrosive properties of deionised water are very low and in addition, fur

cannot form in the boiler. This is the ideal approach for closed hot water

circuits, in particular, because even a low oxygen input into the heating

circuit can also be tolerated.

In general, when the system is lled with deionised water, the pH value

sets itself within the ideal range due to “self-alkalinisation”. If necessary,

a pH value of 8.2 can be very easily alkalised by adding chemicals. In this

way, optimum protection of the entire heating system is achieved.

MONITORING

Analytical recording and monitoring of the relevant water values and

the added conditioning substances is of decisive importance. Therefore,

they should be monitored regularly using appropriate water test

equipment.

For further information refer to VDI 2035.

Open the heating circuit shut-o valves slowly.

Fill the heating circuit via ow and return and vent with the bleed

valve

Bleed valve

8 83033000eUK– Translation of the original operating manual – We reserve the right to make technical changes without notice.

Open the stopcocks slowly.

Flush and vent the domestic hot water circuit by opening the

domestic hot water sanitary delivery points (taps) slightly.

Insulating the hydraulic connections

Insulate the domestic hot water circuit and the heating circuit according

to the relevant local standards, guidelines and directives.

Dismantling

Only qualied heating or refrigerating system personnel are allowed to

remove the unit from the system.

Components of the unit must be recycled or disposed of properly in

accordance with the relevant regulations, standards and directives.

DOMESTIC HOT WATER CIRCUIT

DOMESTIC HOT WATER QUALITY REQUIRED

Water constituent Concentration (mg/l or ppm) Time limits

Stainless Steel Plate heat exchanger

copper brazed

Stainless Steel

Plate heat exchanger

Alkalinity (HCO

)

< 70

70 - 300

>300

≤ 24 h

0/+

Sulphate (SO

)

< 70

70 - 300

>300

–

0/–

HCO

/ SO

> 1.0

< 1.0

–

0/–

Electrical

conductivity

< 10 μS/cm

70 - 300 μS/cm

300 - 500 μS/cm

> 500 μS/cm

–

< 6,0

6,0 - 7,5

7,5 - 9,0

> 9,0

≤ 24 h

Ammonium (NH

)

< 2

2 - 20

>20

≤ 24 h

–

Chloride (Cl

)

< 100

100 - 200

200 - 300

> 300

–

0/+

–

Free chloride (Cl

)

< 1

1 - 5

> 5

≤ 5 h

0/–

–

Hydrogen sulphide (H

< 0,05

> 0,05

–

0/–

Free (aggressive)

carbon dioxide (CO

)

< 5

5 - 20

> 20

–

Total hardness (

dH) 4,0 - 8,5 – + +

Nitrate (NO

)

< 100

> 100

–

Iron (Fe)

< 0,2

> 0,2

–

Aluminium (Al)

< 0,2

> 0,2

–

Manganese (Mn)

< 0,1

> 0,1

–

In general: pH-Wert <6 increases the risk of corrosion.

pH-Wert >7,5 reduces the risk of corrosion.

+ Good resistance under normal conditions

Sulphates and nitrates act as inhibitors of pitting corrosion caused by

chlorides in pH-neutral environments.

0 Corrosion can occur, especially if other factors are evaluated

with 0

SFe

and Mn

can increase the risk of local corrosion in stainless steels.

SiO

> 150 ppm increases the risk of calcication.

– Use not recommended

983033000eUK– Translation of the original operating manual – We reserve the right to make technical changes without notice.

Technical data

Unit designation TWS 3 DZ(S)

Drinking water Delivery temperature: Setting range ı Factory setting °C 35 - 60 ı 45

Drinking water ow rate: Delivery quantity l/min 3 - 18,5

Nominal drinking water conditions: Inlet ı Outlet °C ı °C 10 ı 45

max. delivery quantity with heating water temperature ≥ 60°C l/min 18,5

max. delivery quantity with heating water temperature 55°C l/min 15

max. delivery quantity with heating water temperature 50°C l/min 12

max. allowable operating pressure, drinking water side bar 10

min. allowable operating pressure, drinking water side bar 2

Heating water Limit of use: Heating water temperature °C 50 - 90

Limit of use: Heating water ow rate l/h 180 - 1300

Pressure loss ı Flow rate bar ı l/h 0,3 ı 1300

Dierential pressure controller, factory setting mbar 300

max. allowable operating pressure, heating water bar 3

Installation location Indoors ı Outdoors • applicable ı — not applicable • ı —

Surface mounted ı Flush mounted • applicable ı — not applicable — ı •

Installation data Housing dimensions: Height ı Width ı Depth mm ı mm ı mm 750 ı 580 ı 115

Total weight kg 24

Connections Heating water inlet ... Rp 3/4ʺ IG

Heating water outlet ... Rp 3/4ʺ IG

Drinking water inlet ... Rp 3/4ʺ IG

Drinking water outlet ... Rp 3/4ʺ IG

Temperature maintenance integrated: • ja — no •

Dierential pressure valve integrated: • ja — no •

Heat metering integrated: • ja — no —

813314a

Performance curves

Legend: 813314

“

Drinking water ow rate

“

Heating water ow rate (primary side)

Temp. HW Heating water temperature, primary side

10 83033000eUK– Translation of the original operating manual – We reserve the right to make technical changes without notice.

Dimensioned drawings

750

580

105

170

235

365

535

705

105

115

1 4 532

15077001

www.alpha-innotec.de

D - 95359 Kasendorf

Industriestraße 3

Alpha-InnoTec GmbH

Ers. d.

Ers. f.

Benennung

Zust.

Änderungstext

Datum

Von

Blatt

von

Werkstoff

Gewicht

Maßstab

1:10

Det. Maßstab

Datum

Name

Erstellt

Gepr.

Norm.

23.1.2013

Aepfelbach

toleranz

Allgemein-

Oberflächen

ArtikelNr.

Schutzvermerk ISO 16016 beachten

DIN ISO 2768 -c

Aepfelbach

23.1.2013

Aepfelbach

22.1.2013

23.1.2013

PEP 010-2012

819427

Frischwasserstation

Trinkwarmwasserstation TWS 3DZ

Legend: D819427- A Front view

All dimensions in mm. B Side view from left

F View from underneath

Item Designation Dim.

1 Cold water inlet Rp 3/4ʺ IG

2 Domestic hot water Rp 3/4ʺ IG

3 Cold water outlet Rp 3/4ʺ IG

4 Heating water outlet Rp 3/4ʺ IG

5 Heating water inlet Rp 3/4ʺ IG

1183033000eUK– Translation of the original operating manual – We reserve the right to make technical changes without notice.

Made by ait-deutschland GmbH

Alpha innotec drinking water station Owner's manual

Brand: Alpha innotec

Model: drinking water station

Type: Owner's manual

Alpha innotec drinking water station

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Alpha innotec drinking water station Owner's manual

Alpha innotec drinking water station Owner's manual

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