MEGAFLO Eco Plus Solar Manuale utente

Important

Please read & understand all these instructions before commencing installation.

Please leave this manual with the customer for future reference

MEGAFLO Eco Plus Solar Product Guide

MEGAFLO Eco Plus Solar

Unvented Hot Water Cylinders

800L -1000L

Contents

1. Introduction................................................................................................. 3

1.1 General .................................................................................................... 3

1.2 Symbols used............................................................................................ 3

1.3 Abbreviations ........................................................................................... 3

1.4 Liabilities................................................................................................... 3

2. Safety........................................................................................................... 4

2.1 General safety warnings ........................................................................... 4

2.2 Recommendations .................................................................................... 4

2.3 Speciﬁc safety instructions ........................................................................ 4

3. Technical speciﬁcations .............................................................................. 5

3.1 Technical data........................................................................................... 5

3.2 Dimensions and connections..................................................................... 8

3.3 Electrical diagram(s) .................................................................................. 7

4. Description of the product....................................................................... 11

4.1 General description................................................................................. 11

4.2 Operation principle ................................................................................. 11

4.3 Main components................................................................................... 11

4.4 Standard delivery .................................................................................... 11

5. Before installation .................................................................................... 13

5.1 Installation regulations............................................................................ 13

5.2 Installation requirements......................................................................... 13

5.3 Choice of location .................................................................................. 13

5.4 Transport ................................................................................................ 14

6. Installation ................................................................................................ 15

6.1 General .................................................................................................. 15

6.2 Water connections.................................................................................. 15

6.3 Electrical connections.............................................................................. 21

6.4 Filling the installation .............................................................................. 21

6.5 Solar Primary installation......................................................................... 22

7. Commissioning.......................................................................................... 23

7.1 General .................................................................................................. 23

7.2 Checklist before commissioning.............................................................. 23

7.3 Commissioning procedure ...................................................................... 23

8. Operation .................................................................................................. 24

8.1 General .................................................................................................. 24

9. Maintenance ............................................................................................. 25

9.1 General .................................................................................................. 25

9.2 Standard inspection & maintenance operations....................................... 25

10. Troubleshooting...................................................................................... 27

10.1 Fault ﬁnding ......................................................................................... 27

11. Decommissioning.................................................................................... 28

11.1 Decommissioning procedure................................................................. 28

12. Spare parts .............................................................................................. 28

12.1 Spare parts list ...................................................................................... 28

Benchmark checklist ..................................................................................... 30

Commissioning & service records ................................................................ 31

Guarantee...................................................................................................... 33

Unvented Hot Water Cylinder

1. Introduction

1.1 General

The following instructions are offered as a guide to the

user and installer.

The installation must be carried out by a competent

plumbing and electrical installer in accordance with

Building Regulation G3 (England and Wales), Technical

Standard P3 (Scotland) or Building Regulation P5

(Northern Ireland) and the Water Fitting Regulations

(England and Wales) or Water Byelaws (Scotland).

1.2 Symbols used

In these instructions, various risk levels are employed to

draw the user’s attention to particular information. In

doing so we wish to safeguard the user, avoid hazards

and guarantee the correct operation of the appliance.

DANGER

Risk of a dangerous situation causing serious

physical injury.

WARNING

Risk of dangerous situation causing slight

physical injury.

CAUTION

Risk of material damage.

 Signals important information.

1.3 Abbreviations

`T&P - Temperature & Pressure relief valve

`PRV - Pressure Reducing Valve

`Prv - Pressure relief valve

1.4 Liabilities

Manufacturers liability

Our products are manufactured in compliance with

the requirements of the various applicable European

Directives.

This appliance complies with the requirements of the CE

marking directive.

In the interest of UK customers, we are continuously

endeavouring to make improvements in product quality.

All the speciﬁcations stated in this document are therefore

subject to change without notice.

Our liability as the manufacturer may not be invoked in

the following cases:

`Failure to abide by the instructions on using the

appliance.

`Faulty or insufﬁcient maintenance of the appliance.

`Failure to abide by the instructions on installing the

product.

Installer's liability

The installer is responsible for the installation and the

commissioning of the appliance. The installer must

respect the following instructions:

`Read and follow the instructions given in the manuals

provided with the appliance.

`Carry out installation in compliance with the

prevailing legislation and standards.

`Perform the initial start up and carry out any checks

necessary.

`Complete the commissioning checklist.

`Explain the installation to the user.

`If maintenance is necessary, warn the user of the

obligation to check the appliance and maintain it in

good working order.

`Give all the instruction manuals to the user.

Users liability

To guarantee optimum operation of the appliance, the

user must respect the following instructions:

`Read and follow the instructions given in the manuals

provided with the appliance.

`Call on qualiﬁed professionals to carry out installation

and initial start up.

`Get your ﬁtter to explain your installation to you.

`Have your required checks and services done.

`Keep the instruction manuals in good condition and

close to the appliance.

This appliance can be used by children aged

from 8 years and above and persons with

reduced physical sensory or mental capabilities

or lack of experience and knowledge if they

have been given supervision or instruction

concerning use of the appliance in a safe way

and understand the hazards involved. Children

shall not play with the appliance. Cleaning and

user maintenance shall not be made by children

without supervision.

Children must be supervised to ensure they do

not play with the appliance.

Unvented Hot Water Cylinder

2. Safety

2.1 General safety warnings

2.2 Recommendations

2.3 Speciﬁc safety instructions

WARNING

`If water discharges from the

temperature/pressure relief valve on the

cylinder shut down the boiler. Do not

turn off any water supply. Contact a

competent installer for unvented water

heaters to check the system.

`Do not tamper with any of the safety

valves ﬁtted to the system. If a fault is

suspected contact a competent installer.

`DO NOT bypass the thermal cut-out(s) in

any circumstances.

WARNING

`Only competent persons having received

adequate training are permitted to work

on the appliance and the installation.

`Do not tamper with any of the safety

valves or controls supplied with the

cylinder.

`Before any work, switch off the mains

supply to the appliance.

`Do not switch on if there is a possibility

that the water in the cylinder is frozen.

DANGER

This cylinder is unvented and as such becomes

pressurised when in operation. The combination

of pressurisation and hot water could lead to

serious physical injury if the safety instructions in

this manual are not adhered to.

CAUTION

Do not operate immersion heaters until the

cylinder has been ﬁlled with water.

WARNING

When handling the unit, take appropriate

precautions for the weight of the unit. Weights

can be found in section 3, table 1, page 5.

CAUTION

Annual maintenance is recommended by a

competent person.

Unvented Hot Water Cylinder

3. Technical speciﬁcations

3.1 Technical data

Solar:

800i Solar

1000i Solar

Max direct kW rating 6 6

Aux Coil surface area m² 1.5

Solar Coil surface area m² 3

Aux Coil rating (kW)

15l/min 25.1 26.6

30l/min 37.2 38.3

60l/min 47.5 45.8

Aux coil heat up time

(mins)

15l/min 64.2 74.5

30l/min 44.6 54.1

60l/min 34.2 42.8

Solar Coil Rating (kW) 30l/min 42.9 54.3

Solar coil heat up time

(mins) 30l/min 47.3 50.8

Pressure drop through

Aux coil (MPa)

15l/min 0.001

30l/min 0.002

60l/min 0.017

Pressure drop through

solar coil (MPa)

15l/min 0.002

30l/min 0.008

60/min 0.030

Heat loss (kWh in 24h) 2.74 3.33

Hot water capacity (volume of water drawn off >40°C) 681 850

Weight full (kg)

Weight empty (kg)

1017 1225

217 225

Max supply pressure 1.6MPa (16 bar)

Max design pressure 0.8 MPa (8 bar)

Max operating pressure (PRV) 0.35MPa (3.5 bar)

Max expansion vessel charge pressure 1.0MPa (10 bar)

Expansion relief valve setting 0.8MPa (8 bar)

T&P valve setting 1.0MPa (10 bar)/90°C

Expansion Prv set pressure 0.8MPa (8 bar)

Maximum primary pressure (Solar and Aux) (see Note 3) 1.0MPa (10 bar)

Notes:

1. Indirect cylinders tested in conformance with BS EN 12897:2006.

2. Heat up time from cold through 45°C, based on a ﬂow temperature of 80°C +/- 2°C & normal volume.

3. The primary coil should not be exposed to more than 0.3MPa (3 bar) without the cylinder being full of water and

under the minimum working pressure.

Table 1: Technical data - Solar

Unvented Hot Water Cylinder

Table 3: General dimensions table - Solar 800l - 1000l

Item Connection 800l 1000l

ANA 1914 2327

BT&P/ 1/2" BSP 1503 1863

C1/2" & 1" BSP 1218 1538

D1 3/4" BSP 1138 1338

E1/2" BSP 1049 1249

F1 1/4" BSP 998 1198

G1 1/4" BSP 798 998

H1/2" BSP 710 710

I1 1/4" BSP 623 623

J1 1/4" BSP 448 448

K1" BSP 438 438

Figure 1: General dimensions - Solar 800l - 1000l

35°REF

40°REF 45°REF

30°REF

1111 REF

Ø1019 REF

OUTLET

2”BSP FEMALE

Unvented Hot Water Cylinder

NOTES: Control terminal numbering may differ from those shown.

Refer to instructions with controls selected.

A double pole isolating switch must be installed in the mains supply.

All earth connections must be connected back to the mains earth supply.

HTG

DHW

ON LN

345 6 7 8 9 10

12 3 45 6 7 8 9 10

(Supply)

12 3

Br Bl

0GY

Br Bl

13 2

Programmer Boiler Pump

Zone valve (HTG)

Cylinder terminal block

Room stat

Zone valve (DHW)

(supplied)

Junction box

Schematic Wiring Diagram - Basic 2 x 2 Port Valve System

Figure 2: Schematic wiring diagram - basic 2 x 2 port valve system

HTG

DHW

ON L

345 6 7 8 9 10

12 3 45 6 7 8 9 10

(Supply)

12 3

GWBl

0GY

Programmer Boiler Pump

Zone valve (HTG)

Cylinder terminal block

Room stat

Zone valve (DHW)

(supplied)

Junction box

NOTES: Control terminal numbering may differ from those shown.

Refer to instructions with controls selected.

A double pole isolating switch must be installed in the mains supply.

All earth connections must be connected back to the mains earth supply.

DHW

OFF

Schematic Wiring Diagram - 3 Port Mid Position Valve System. N.B. Must Be Used In Conjunction

With 2 Port Zone Valve Supplied

13 2 N

Figure 3: Schematic wiring diagram - 3 port mid position system

Unvented Hot Water Cylinder

Figure 4: Immersion head assembly

Step 1:

- remove 4 retaining screws and lift lid o immersion heater

Step 2:

- remove 2 screws holding thermostatic controls and slide out

thermostat from stat pocket.

Step 3:

- Wire up immersion as per gures 6, page 11. If three phase

wiring chosen remove“Live” side buzz bar and t extra posts

(supplied) to L1, L2 & L3. (outer case and bracket removed for clarity)

Notes:

For single phase wiring use 4mm² H07RNF 3 Core

Use 2 x Two Pole 40A contactors for single phase

For 3 phase use Five core 1mm² Fused at max 10A

Use 2 x Three Pole 16A per pole contactors for 3 phase

For signal wire use 5 core 1mm² Fused at max 6A for thermostat

and thermal cut-out controls.

Disconnection time of the circuit protective device must be maintained

below the regulatory minimum (in the UK 5 seconds for xed equipment),

cable sizes may have to be higher depending on the characteristics of the

installation supply.

6kW immersion

Step 4:

Replace thermostatic controls taking care when inserting

the capillary bulbs into stat pocket and wire up as per

gure 6 or 7, page 9 .

Unvented Hot Water Cylinder

Neutral

Fuse

(not supplied)

Live

Fuse

(not supplied)

Contactors

(not supplied)

Neutral

L2 L3

Single phase wiring schematic

3 phase wiring schematic

Rotate spindle clockwise to increase

temperature and counter clockwise to

decrease the temperature

B-2 = Thermostat controls

A-1 = Thermal cut-out

Earth

Thermostat Controls

Neutral

Earth

Immersion Heater

Earth

Live

Immersion Heater

= Max temp

= Approx 65°

= Min temp

Thermostat Controls

Contactors

(not supplied)

Note:

The 2 external contactors must be approved

components certied for 10,000 cycles of

operation for the contactor controlled by the

thermostat and at least 30 for the contactor

controlled by the non-self-resetting thermal

cut-out.

L3 N

Figure 5: Single phase wiring schematic

Figure 6: Three phase wiring schematic

Unvented Hot Water Cylinder

Figure 7: Indirect wiring schematic

1 2 3C 2

High limit

thermostat

Control

thermostat

Common

(S/L)

Load (Demand Contact)

Satised

°C

Temperature

Adjustment

Thermal cut-out

reset under screw

head

Unvented Hot Water Cylinder

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