Mynute HE

High efficiency system boiler

Users

Instructions

THESE INSTRUCTIONS

TO BE RETAINED

BY USER

Vokèra is a licensed member of the Benchmark scheme which aims to improve the standards of installation and commissioning of domestic hot water systems in the UK.

Contents

Introduction

Dear customer

Do’s and don’t’s

Things you should know

1.1

Gas appliances

1.2

Electrical supply

1.3

Guarantee registration card

1.4

Benchmark log book

1.5

How does it work?

1.6

Dimensions

1.7

Clearances required

1.8

Frost protection system

1.9

Status indicators

1.10 Digital display

Getting started

2.1

Before switching on

2.2

Appliance controls

2.3

Lighting the boiler

2.4

Adjusting the operating temperature

Page

2

2

Page

3

3

3

3

3

3

3

3

3

3

Page

5

5

5

5

How to...

3.1

Top-up the system

3.2

Reset the appliance

3.3

Shut down the system for short periods

3.4

Shut down the system for long periods

3.5

Care for the appliance

Page

6

6

6

6

6

What if...

4.1

I suspect a gas leak

4.2

I have to frequently to top-up the system

4.3

The RED fault light is on

4.4

The appliance is due its annual service

4.5

I need to call an engineer

Page

7

7

7

7

7

Setting the Vokera…

5.1

Mechanical clock

5.2

Digital programmer (2-channel)

Page

7

7

INTRODUCTION

Dear Customer

Your Vokera Mynute HE boiler has been designed to meet and exceed the very latest standards in gas central heating technology, and if cared for, will give years of reliable use and efficiency.

Please therefore take some time to read these instructions carefully.

●

●

●

●

●

●

●

Do’s and Don’t’s

Do

ensure that the system pressure is periodically checked

Do

ensure that you know how to isolate the appliance in an emergency

Do

ensure that you are familiar with the appliance controls

Do

ensure that your installer has completed the appliance log book section

Do not

attempt to remove the appliance casing or gain internal access

Do not

hang clothes etc. over the appliance

Do not

forget to have the appliance serviced annually.

This booklet is an integral part of the appliance. It is therefore necessary to ensure that the booklet is handed to the person responsible for the property in which the appliance is located/installed. A replacement copy can be obtained from Vokera customer services.

2

THINGS YOU SHOULD KNOW

1.1

1.2

1.3

1.4

1.5

GAS APPLIANCES

Gas Safety (Installations and Use) Regulations

(UK).

In the interests of your safety and that of others it is a legal requirement that all gas appliances are installed and correctly maintained by a competent person and in accordance with the latest regulations.

ELECTRICAL SUPPLY

Please ensure that this appliance has been properly connected to the electrical supply by means of a double pole isolator or un-switched socket, and that the correct size of fuse (3 AMP) has been fitted.

Warning: this appliance must be earthed!

GUARANTEE REGISTRATION CARD

Please take the time to fill out your guarantee registration card. The completed warranty card should be posted within 30 days of installation.

BENCHMARK LOG BOOK (UK only)

A logbook section can be found at the rear of the appliance installation booklet. This important document must be completed during the installation/ commissioning of your boiler. All CORGI registered installers carry a CORGI ID card, and have a registration number. These details should be recorded in the

Benchmark

logbook section within the installation booklet. You can check your installers details by calling CORGI direct on 01256

372300. Failure to install and commission the appliance in accordance with the manufacturers instructions may invalidate the warranty. This does not affect your statutory rights.

HOW DOES IT WORK?

Your Mynute HE boiler supplies heated water to your radiators and hot water tank.

The central heating and hot water is controlled via a time clock or programmer and any thermostats that your installer may have fitted. The boiler will light when it receives a request from the time clock or programmer via any thermostat that may also be installed. Your Mynute HE boiler lights electronically and does not have a pilot light. In the unlikely event of a fault developing with your boiler, the supply of gas to the burner will be terminated automatically.

1.7

1.8

1.9

1.6

DIMENSIONS

Mynute 12/15/20HE

HEIGHT

WIDTH

DEPTH

Mynute 25HE

Mynute 30/35HE

HEIGHT

WIDTH

DEPTH

HEIGHT

WIDTH

DEPTH

CLEARANCES REQUIRED

ABOVE

BELOW

LEFT SIDE

RIGHT SIDE

FRONT

150 mm

150 mm

50 mm

12mm

600 mm

FROST PROTECTION SYSTEM

740mm

400mm

340mm

780mm

400mm

358mm

780mm

450mm

358mm

The Mynute HE is equipped with a built-in frost protection system, this enables the boiler to override the time controls – even if switched off – and operate the burner and/or pump, should the temperature drop below 6 °C.

Please note that the frost protection system is designed to protect the appliance only, should frost protection be required for the heating system, additional controls may be required.

When the frost protection system has been activated, ‘AF’ is displayed on the appliance LED display (see below).

NOTE

The frost protection system is reliant on the appliance having a permanent electrical supply, and being in a non-fault condition.

APPLIANCE STATUS INDICATORS

Your boiler is equipped with 2 status LED indicators, the Green LED indicates that the appliance is working normally, whilst the Red LED indicates the appliance has detected a fault.

3

1.10

DIGITAL DISPLAY

The 2-digit digital display will normally show the current working (outlet) temperature of the boiler, however in certain circumstances a fault code or specific characters will be displayed to indicate that the appliance is performing a specific function.

1

8

5

6

3

7

Fig. 1

1. Pressure gauge

2. Mode selector switch

3. Temperature selector

4. Clock/programmer (if fitted)

5. 2-digit display

6. Red LED indicator

7. Front cover

8. Green LED indicator

2

4

4

GETTING STARTED

2.1

2.2

BEFORE SWITCHING ON

Before switching the appliance on please familiarise yourself with:

● how to isolate the appliance from the gas, water, and electricity supplies;

●

●

●

● how to check and top-up – if necessary – the system water pressure; the time clock or programmer; any external thermostats and their functions; the appliance controls.

APPLIANCE CONTROLS (see fig. 1)

The appliance controls are situated on the lower front of the appliance. The appliance controls include:

● pressure gauge;

●

●

●

● appliance mode selector; temperature selector;

2-digit LED display; burner ON mode (green);

●

● fault indicator (red); optional integral time clock/programmer (if fitted).

The

pressure gauge

shows the current pressure of your heating system, the gauge should be set between 1 and 1.5 BAR. When the appliance is operating the gauge may rise or fall slightly, this is quite normal. The minimum permissible level for the safe and efficient operation of the appliance is

0.5 BAR. Should the pressure fall below 0.5 BAR, the boiler may lockout.

The

appliance mode selector

is used to switch the boiler to the various operating modes:

●

RESET “ ”

●

OFF “ ”

●

ON “ ”.

NOTE

The appliance frost protection is active in all of the above modes.

The

temperature selector

can be used to vary the temperature of the water that circulates around your radiators and/or hot water tank. The temperature range is adjustable between 40 °C and 80 °C for standard CH systems and between 20 °C - 45

°C under-floor CH systems.

The

2-digit LED display normally

shows the operating temperature of the appliance, however it can also display additional characters or flashing numbers to signify specific operating modes or fault codes.

When the

status indicator (Green) is lit

it indicates that the flame is detected and the burner is fully in ON status.

When the

fault indicator (Red) is lit

it indicates that the appliance has identified a possible fault and performed a safety shut-down.

The

integral time clock or programmer (when fitted)

can be used to switch the heating and/or hot water on and off at pre-determined intervals.

2.3

2.4

LIGHTING THE BOILER

Ensure the gas and electrical supply to the boiler are turned on.

Turn the mode selector switch to the

ON

position.

When there is a request for heating or hot water via the time clock or programmer, the boiler will begin an ignition sequence. When the appliance reaches the set temperature, the burner will go off for a minimum period of approximately 3 minutes.

When the programmer/time clock or external thermostats heating request has been satisfied, the appliance will switch off automatically.

ADJUSTING THE OPERATING TEMPERATURE

Rotate the temperature selector – clockwise to increase, counter-clockwise to decrease – to the desired temperature setting. The temperature can be set between 40 °C - 80 °C standard CH systems and between 20 °C - 45 °C under-floor CH systems.

NOTE

If the appliance fails to ignite during the ignition sequence, it will enter a lockout condition. Should this occur, please allow a period of at least two minutes before re-setting the appliance.

5

HOW TO...

3.1

Fig. 3 flow/return pipe

Fig. 4

HOW TO TOP-UP THE SYSTEM PRESSURE

(fig. 3 & 4)

The system pressure must be checked periodically to ensure the correct operation of the boiler.

The needle on the gauge should be reading between 1 and 1.5 BAR when the boiler is in an off position and has cooled to room temperature. If the pressure requires ‘topping-up’ use the following instructions as a guide.

●

Locate the filling valve connections (usually

●

●

●

● beneath the boiler, see fig. 3).

Attach the filling loop to both connections.

Open the filling valve slowly until you hear water entering the system.

Close the filling valve when the pressure gauge

(on the boiler) reads between 1 and 1.5 BAR.

Remove the filling loop from the connections.

control valve temporary connection control valve

APPLIANCE FAULT CODES

AL52

AL55

AL60

AL71

AL73

AL74

AL79

CODE ACTION REQUIRED

AL10

AL20

Reset appliance. Call engineer if fault re-occurs

Reset appliance. Call engineer if fault re-occurs

AL21

AL26

AL28

AL34

AL40

AL41

Reset appliance. Call engineer if fault re-occurs

Reset appliance. Call engineer if fault re-occurs

Reset appliance. Call engineer if fault re-occurs

Reset appliance. Call engineer if fault re-occurs

Check system pressure and refill if necessary.

Reset appliance. Call engineer if fault re-occurs

Check system pressure and refill if necessary.

Call engineer if fault re-occurs

Call engineer

Call engineer

Call engineer

Call engineer if fault re-occurs

Call engineer if fault re-occurs

Reset appliance. Call engineer if fault re-occurs

Reset appliance. Call engineer if fault re-occurs

correct pressure value double check valve supply pipe

3.3

3.4

3.5

IMPORTANT

If the appliance requires to be reset frequently, it may be indicative of a fault, please contact your installer or Vokera Customer Services for further advice.

HOW TO SHUT DOWN THE SYSTEM FOR

SHORT PERIODS

The system and boiler can be shut down for short periods by simply turning the time clock to the off position. It is also advisable to turn off the main water supply to the house.

HOW TO SHUT DOWN THE SYSTEM FOR LONG

PERIODS

If the house is to be left unoccupied for any length of time – especially during the winter – the system should be thoroughly drained of all water. The gas, water, and electricity supply to the house should also be turned off. For more detailed advice contact your installer.

HOW TO CARE FOR THE APPLIANCE

To clean the outer casing use only a clean damp cloth. Do not use any scourers or abrasive cleaners.

3.2

HOW TO RESET THE APPLIANCE

When the red fault LED is illuminated, the appliance will require to be reset manually. Before resetting the boiler, check what action is required to be taken, using the information on the fault code table below. Allow a period of two minutes to elapse before rotate the status mode knob. To reset the alarm the status mode knob has to cross the OFF position.

6

WHAT IF...

4.1

4.2

4.3

WHAT IF I SUSPECT A GAS LEAK

If you suspect a gas leak, turn off the gas supply at the gas meter and contact your installer or local gas supplier. If you require further advice please contact your nearest Vokera office.

4.4

WHAT IF I HAVE FREQUENTLY TO TOP-UP

THE SYSTEM

If the system regularly requires topping-up, it may be indicative of a leak. Please contact your installer and ask him to inspect the system.

WHAT IF THE RESET LIGHT IS ON

If the Red LED light is illuminated, it indicates that the boiler has failed to ignite or has detected a possible fault. When this happens the boiler automatically shuts down and requires to be reset manually (see 3.2).

4.5

WHAT IF THE APPLIANCE IS DUE ITS ANNUAL

SERVICE

Advice for tenants only

Your landlord should arrange for servicing.

Advice for homeowners

Please contact Vokera Customer Service

(0870

333 0220 (UK) or 05655057 (ROI)

if you would prefer a Vokera service engineer or agent to service your appliance. Alternatively your local

CORGI registered engineer may be able to service the appliance for you.

WHAT IF I NEED TO CALL AN ENGINEER

If you think your boiler may have developed a fault, please contact your installer or Vokera Customer

Services

(0870 333 0220 (UK) or 05655057 (ROI)

have all your details to hand including full address and postcode, relevant contact numbers, and your completed appliance log book.

SETTING THE VOKERA...

5.1

SETTING THE VOKERA MECHANICAL CLOCK

If your boiler has been installed with the Vokera mechanical clock, it can be used and adjusted as follows:

OFF

AUTO

ON

Setting the time

The time of day can be set by grasping the outer edge of the black dial and turning it in a clockwise direction until the correct time is in line with the white pointer.

Setting the “switching times”

The

“ON” periods

are set by sliding the black tappets, adjacent to the time periods required, to the outer edge of the dial.

The tappets that remain at the centre of the dial will be the

“OFF” periods

.

The smallest switching time (ON or OFF) is 15 minutes.

To select

“AUTO”

mode move the selector switch in central position.

To select

“ON”

mode move the selector switch in the bottom position.

To select

“OFF”

mode move the selector switch in the upper position.

5.2

THE VOKERA DIGITAL PROGRAMMER

If your boiler has been installed with the Vokera twin channel programmer, it can be used and adjusted as follows:

FEATURES

●

Backlight display

Built-in standard programme

7-day battery back-up

Manual over-ride

2-ON/2-OFF periods for each channel (Heating/

Hot water).

5.2.1

SETTING THE DAY & TIME

●

Press and hold the button for 4-seconds or until the clock display flashes.

Press either the + or - button to increase or decrease the displayed value of minutes to the correct (actual) time and press to confirm.

Press either the + or - button to increase or decrease the displayed value of hours to the correct (actual) time and press to confirm.

Press either the + or - button to increase or decrease the displayed day to the correct (actual) day of the week and press to confirm.

5.2.2

CLOCK CHANGE

To accommodate any change from summer time to winter time, simply press and hold either the + or - button to advance or retard the hours value by one hour.

7

5.2.3

SETTING THE VOKERA MECHANICAL CLOCK

The programmer is supplied with a built-in default programme that can be stored/used for convenience.

To store the default programme, simply press and hold both the + and - buttons for 3-seconds.

DEFAULT PROGRAMME

Day 1

ON1

OFF1

ON2

OFF2

ON1

OFF1

ON2

OFF2

Day 5

ON1

OFF1

ON2

OFF2

Day 6

ON1

OFF1

ON2

OFF2

Day 2

ON1

OFF1

ON2

OFF2

Day 3

ON1

OFF1

ON2

OFF2

Day 4

Day 7

ON1

OFF1

ON2

OFF2

HTG

6:30

8:30

16:30

22:30

16:30

22:30

HTG

6:30

9:00

16:00

22:30

6:30

8:30

16:30

22:30

HTG

6:30

8:30

HTG

6:30

8:30

16:30

22:30

HTG

6:30

8:30

16:30

22:30

HTG

HTG

6:30

9:00

16:00

22:30

HW

6:30

8:30

16:30

22:30

16:30

22:30

HW

6:30

9:00

16:00

22:30

6:30

8:30

16:30

22:30

HW

6:30

8:30

HW

6:30

8:30

16:30

22:30

HW

6:30

8:30

16:30

22:30

HW

HW

6:30

9:00

16:00

22:30

5.2.4

PROGRAMMING PROCEDURE

For each channel (C1 & C2) there are 2 timed ON settings, and 2 timed OFF settings for each day of the week. The programming sequence for each channel is as follows:

● programme the C1 channel (heating) 1 st ON then

1 st OFF, then 2 nd ON and then 2 nd OFF for each

● day of the week starting from day 1 (Monday).

The same procedure will be carried out for the remaining subsequent days (day 2 till day 7) after the final OFF (2 nd

OFF, day-7) setting has been programmed on C1, the display will move to show the programming icons on channel C2

(hot water). C2 can then be programmed in the same sequence as detailed for C1.

To adjust or re-programme the default programme, please proceed as follows:

●

Press and hold the

P

button for 3-seconds, the display will show

PRO

for 1-second to signal that

● the programmer is now ready to be re-programmed/adjusted (programming mode).

The first day of the week will blink on the display, followed by the HTG ‘ON’ icon, then followed by

● the stored value (time).

To adjust the current – stored – value, press either the + or - button to increase or decrease the displayed value to the desired setting.

Press

P

to confirm and store the new value.

Use the same (above) sequence for the subsequent ON/OFF settings and subsequent days.

Once the programming of C1 (heating) channel has been completed, the programmer sequence will automatically move on to C2 (hot water).

NOTE

If no buttons are pressed within a 10-second period, the programmer will exit the programming mode and revert to the normal display.

To review the current stored programmes, press and release the

P

button whereby the display will scroll through the current stored programmes. To exit and return to the current operating mode, press and release the

P

button.

5.2.5

OPERATING MODES

Each channel (C1 & C2) has 3-different modes of operation:

●

Automatic: using the stored ON/OFF settings

●

●

ON: 24-hours each day

OFF: 24-hours each day.

To change the operating mode, press either C1 or

C2 (depending on your preference) and select the desired mode of operation.

Manual operation - OFF

MAN

AUTO

1 2 3 4 5 6 7

½ z ¾

12:34

MAN

AUTO

OFF

ON

½ ¾

OFF

ON

Manual operation - ON

1 2 3 4 5 6 7

MAN

AUTO

OFF

ON

½ z

12:34

¾

½ ¾

MAN

AUTO

OFF

ON

MAN

AUTO

OFF

ON

Automatic (programmed settings)

1 2 3 4 5 6 7 1 2 3 4 5 6 7

½ z

17:34

¾

½ ¾

MAN

AUTO

OFF

ON

MAN

AUTO

OFF

ON

½

½ z

15:22

¾

¾

MAN

AUTO

OFF

ON

8

9

Registered address:

Vokèra Ltd

Borderlake House

Unit 7 Riverside Industrial Estate

London Colney

Herts AL2 1HG

[email protected]

www.vokera.co.uk

www.vokera.ie

Sales, General Enquires

T

0844 391 099

F

0844 391 0998

Vokèra Ireland

West Court, Callan

Co Kilkenny

T

056 7755057

F

056 7755060

Vokèra Limited reserve the right to change specification without prior notice

Consumers statutory rights are not affected.

A Riello Group Company.

Company Reg No: 1047779