Dimplex Ec-eau Leitfaden

Important - This manual must be left with the user after Installation!

eau

Cylinder

Range

Installation and User Instructions

Heat Pump Cylinders

without buffer tanks

Up to 3 L

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Dimplex is a licensed member of the Benchmark Scheme which aims to

improve the standards of installation and commissioning of domestic heating

and hot water systems in the UK and to encourage regular servicing to optimise

safety, efficiency and performance.

Benchmark places responsibilities on both manufacturers and installers. he

purpose is to ensure that customers are provided with the correct equipment

for their needs, that it is installed, commissioned and serviced in accordance

with the manufacturer’s instructions by competent persons and that it meets

the requirements of the appropriate Building Regulations. he Benchmark

Checklist can be used to demonstrate compliance with Building Regulations and

should be provided to the customer for future reference.

Installers are required to carry out installation, commissioning and servicing

work in accordance with the Benchmark Code of Practice which is available

from the Heating and Hot Water Industry Council who manage and promote the

Scheme. Visit www.centralheating.co.uk for more information.

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Overall View

0Overall View

Figure 1: Overall view of Heat Pump Cylinder installation process

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Contents

1Contents

OVERALL VIEW .......................................................................................... 3

CONTENTS ................................................................................................ 4

INTRODUCTION ......................................................................................... 6

SCOPE OF DELIVERY .................................................................................. 6

PRE-INSTALLATION ADVICE ........................................................................ 7

4.1

ISK ASSESSMENT

...................................................................................... 7

4.2

ITING CONSIDERATIONS

.............................................................................. 7

4.3

OLD WATER SUPPLY

................................................................................... 8

4.4

UILDING REGULATION

ISCHARGE REQUIREMENTS

.......................................... 8

4.4.1

Discharge pipe D2 ......................................................................... 9

4.4.2

Worked example ..........................................................................1

4.4.3

Termination of discharge pipe ........................................................11

4.5

IMITATIONS

............................................................................................11

INSTALLATION..........................................................................................12

5.1

OLD

ATER

NLET WITH

NLET

ONTROL

ROUP

...............................................12

5.1.1

Correctly site the cylinder ..............................................................12

5.1.2

Install the inlet group....................................................................12

5.1.3

Expansion vessel ..........................................................................12

5.1.4

Balanced cold water supply............................................................12

5.1.5

Drain valve ..................................................................................12

5.2

ATER

UTLET

..................................................................................13

5.2.1

Thermostatic mixing valve .............................................................13

5.2.2

Pipe insulation..............................................................................13

5.3

ISCHARGE PIPES FROM SAFETY DEVICES

..........................................................13

5.3.1

Discharge pipe D1............................................................................13

5.3.2

Discharge pipe D2 ........................................................................13

5.3.3

Tundish .......................................................................................14

5.4

MMERSION HEATER

....................................................................................14

5.5

OIL FLOW CONNECTIONS

............................................................................15

5.6

OIL RETURN CONNECTIONS

.........................................................................15

5.7

HERMOSTAT CONNECTION AND INSTALLATION OF THE HEAT PUMP

DHW

TEMPERATURE

SENSOR

..................................................................................................16

5.7.1

Connection of the sensor ...............................................................17

5.8

ONNECTION OF

ECONDARY

ETURN

..............................................................2

COMMISSIONING......................................................................................21

MAINTENANCE..........................................................................................22

SPARE PARTS ...........................................................................................23

TECHNICAL DATA......................................................................................24

9.1

YLINDER HEAT EXCHANGER PRESSURE DROP

.....................................................26

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Contents

USER INSTRUCTIONS ................................................................................28

1 .1

ENERAL

.............................................................................................28

1 .2

PERATION

..........................................................................................29

1 .2.1

Water temperature direct electric heating ........................................29

1 .2.2

Water temperature auxiliary heating ...............................................3

1 .3

AINTENANCE

.......................................................................................3

1 .4

ROUBLESHOOTING

.................................................................................31

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Scope of Delivery

2Introduction

Thank you for choosing a Dimplex

product. The EC-Eau heat pump

cylinders are specified with large, high

surface area heat exchangers,

specifically sized to match the

requirements of Dimplex heat pumps.

They boast 6 mm of low GWP

insulation foam, together with 1 %

recyclable stainless steel inner

components and a sleek black, hard

wearing outer shell manufactured

from completely recycled materials.

For more detailed information on

product features, please see the

Technical Data section in this manual.

3Scope of delivery

Please ensure you check the scope of

delivery below before signing any

delivery documentation. Claims for

missing or damaged parts after

signing for the delivery will not be

accepted.

* These items are supplied factory fitted

able 1: Scope of Delivery

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Pre

Installation

4Pre-Installation

Advice

Please read the following section

carefully before commencing

installation. If in any doubt, please

call the appropriate help desk.

Disregarding the instructions given in

this manual in its entirety and any

relevant regulations, standards and

codes of practice will void the

guarantee of this product.

Handling – depending on the size of

the unit and access to its installation

location, consideration must be given

to the handling of the unit. Please

note that handling, installation and

use of this product is subject to the

Health and Safety at Work Act.

If the unit is not installed

immediately, it should remain in its

protective packaging with all pipe

protectors/end caps applied to

prevent damage and dirt deposit

inside the cylinder and the coils.

Pipe work – the pipe runs should be

executed as short as possible, unused

pipe work should be removed and all

remaining pipe work should be lagged

in accordance with regulatory

requirements to prevent heat loss and

the formation of condensation.

Taps and fittings – all taps and

fittings incorporated in the unvented

system should have a rated operating

pressure of .6 MPa (6 bar) or above.

4.1 Risk assessment

The compilation of a risk assessment

is strongly recommended before

installing the product. The following

areas require particular consideration

in addition to the information required

by the Health and Safety at Work Act.

- scalding: where appropriate or

required by law a thermostatic

mixing valve is to be fitted to the

hot water outlet of the cylinder (see

also water borne organisms).

- explosion: the unit is fully equipped

with all relevant safety equipment

to comply with current regulations.

The correct design and function has

been verified by independent third

party testing. The correct

application thereof is the

responsibility of the competent

installer.

- water borne organisms (i.e.

Legionella): if applicable a risk

assessment should be carried out

following the recommendations

outlined in the Approved Code of

Practice L8.

- the user preference must be

considered when commissioning the

system, in particular when adjusting

the solar and auxiliary system

temperature and timer settings.

4.2 Siting considerations

When choosing a suitable location for

the cylinder the following aspects

should be considered:

- structural integrity

- access for installation, operation,

maintenance and replacement

- routing of discharge pipe work

- access to water mains supply, hot

and cold water distribution pipe

work

- access to suitable electricity supply

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Pre

Installation

- location in relation to remaining

system components such as

auxiliary and solar heating system

- frost protection

The heat pump cylinder range is

designed to be floor standing,

vertically mounted, indoors and in a

frost free environment. The cylinder

may be located on any flat and level

surface, provided it is sufficiently

robust to support the weight of the

cylinder when full of water (please see

technical data) and suitably accessible

for replacement/maintenance without

specialist tools or lifting equipment as

this will void the warranty conditions.

The position and orientation of the

cylinder should be such that easy

access is provided for servicing the

controls. A minimum distance of

4 mm in front of the immersion is

recommended, to allow the

replacement of the immersion heater

should the need arise. When installing

the cylinder all labels should be clearly

visible and ensure that no pipework

hinders any work to be carried out on

the various cylinder components.

Particular care must be taken when

placing the cylinder in a garage or

outbuilding. All exposed pipe work

must be correctly insulated to avoid

frost damage.

4.3 Cold water supply

For satisfactory and safe performance

of the unvented cylinder the water

supply must meet the following

criteria:

Minimum dynamic

pressure

15 kPa

(1.5 bar)

Maximum inlet supply

pressure

12 kPa

(12 bar)

Minimum flow rate 15 l/min

Max. chlorine content 25 mg/L

Max. water hardness 2 mg/L

The following instructions have to be

followed when installing the cold

water mains supply to the cylinder:

- The cold water supply to the

cylinder must come directly from

the cold water mains after the

mains stop valve to the property.

- The cold water inlet pipe work

should have at least an inside

diameter of 19mm and should meet

the requirements of the water

regulations for the supply of

wholesome water.

4.4 Building regulation G3

Discharge

requirements

As part of the requirements of

Building Regulation G3 any discharge

from an unvented system should be

conveyed to where it is visible, but

will not cause danger to persons in or

about the building. The tundish and

the discharge pipes should be fitted in

accordance with the requirements of

Building Regulation approved

document G3, (England and Wales),

Part P of Northern Ireland and

Standard 4.9 of Scotland.

Pre

Installation

HP Installation and User Instructions R 918

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4.4.1 Discharge pipe D2

The discharge pipe (D2) from the

Tundish should:

- “have a vertical section of pipe at

least 300mm long below the

tundish before any elbows or

bends in the pipework and be

installed with a continuous fall of

at least 1 in 200 thereafter.”

The discharge pipe (D2) should be

made of:

- “metal; or other material that has

been demonstrated to be capable

of safely withstanding

temperatures of the water

discharged and is clearly and

permanently marked to identify

the product and performance

standard”

The discharge pipe D2 should be at

least one pipe size larger than the

nominal outlet size of the safety

device unless its total equivalent

hydraulic resistance exceeds that of a

straight pipe 9m long, i.e. for

discharge pipes between 9m and 18m

the equivalent resistance length

should be at least two sizes larger

than the nominal outlet size of the

safety device; between 18 and 27m at

least 3 sizes larger, and so on; bends

must be taken into account in

calculating the flow resistance. See

Figure 2, Table 2 and the worked

example.

Note: An alternative approach for

sizing discharge pipes would be to

follow Annex D, section D.2 of BS

6 00:2006 + A1:2009).

Figure 2: ypical discharge pipe arrangement

HP Installation and User Instructions R 918

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Pre

Installation

able 2: Sizing of copper discharge pipe “D2” for common temperature relief valve outlet sizes

4.4.2 Worked example

his example is for a G½ temperature

relief valve with a discharge pipe (D2)

(as fitted on 125 to 300L cylinders)

having 4 No. 22mm elbows and length

of 7m from the tundish to the point of

discharge.

From Table 2, the maximum

resistance allowed for a straight

length of 22mm copper discharge pipe

(D2) from a G½ temperature relief

valve is 9.0m. Subtract the resistance

for 4 No. 22mm elbows at 0.8m each

= 3.2m.

herefore the maximum permitted

length

equates to 5.8m, which is less than

the actual length of 7m, therefore

calculate the next largest size.

Maximum resistance allowed for a

straight length of 28mm copper

discharge pipe (D2) from a G½

temperature relief valve is: 18m

Subtract the resistance for 4 No.

28mm elbows at 1.0m each = 4m

herefore the maximum permitted

length equates to 14m.

As the actual length is 7m, a 28mm

(D2) copper pipe will be satisfactory.

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