VOKERA Mynute User manual

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.
Mynute 24m
Standard efficiency system boiler
Users
Instructions

1Mynute 24m
INTRODUCTION
Page
Dear customer 2
Do’s and don’t’s 2
1.1 gas appliances 3
1.2 electrical supply 3
1.3 guarantee registration card 3
1.4 how does it work? 3
1.5 dimensions 3
1.6 clearances 3
2.1 before switching on 4
2.2 appliance controls 4
2.3 lighting the boiler 4
3.1 top-up the system 5
3.2 reset the appliance 5
3.3 shut down the system for short periods 5
3.4 shut down the system for long periods 5
3.5 care for the appliance 5
4.1 I suspect a gas leak 6
4.2 I frequently have to top-up the system 6
4.3 the reset light is on 6
4.4 the appliance is due its annual service 6
4.5 I need to call an engineer 6
5.1 Vokera Time clock 6
Contents
Introduction
Things you should know
Getting started
How to....
What if....
Setting the Vokera...

2Mynute 24m
INTRODUCTION
Dear Customer
Your Mynute 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’ts
●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
●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.
Fig. 1
1 Pressure gauge
2 Mode selector switch
3 Fault indicator led
4 CH position
5 Timeclock aperture (optional)
12
34 5

3Mynute 24m
1.1 GAS APPLIANCES
In the interests of your safety and that of others
it is a requirement that all gas appliances are
installed and correctly maintained by a compe-
tent person and in accordance with the latest
regulations.
1.2 ELECTRICAL SUPPLY
Please ensure that this appliance has been prop-
erly 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!
1.3 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.
1.4 HOW DOES IT WORK?
Your Mynute boiler is a central heating boiler,
which supplies heated water to your radiators and
hot water cylinder.
It is controlled by the time clock or programmer
and any thermostats that your installer may have
fitted.
The Mynute 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.
THINGS YOU SHOULD KNOW
1.5 DIMENSIONS
HEIGHT 740mm
WIDTH 400mm
DEPTH 332mm
1.6 CLEARANCES REQUIRED
ABOVE 150mm
BELOW 150mm
SIDES 12mm
FRONT 600mm

4Mynute 24m
GETTING STARTED
2.1 BEFORE SWITCHING ON
Before switching the appliance on please familiar-
ise 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.
2.2 APPLIANCE CONTROLS (see fig. 1)
The appliance controls are concealed behind the
front flap. To gain access to the controls simply lift
upward to engage the holding clip.
The appliance has a mode switch, variable ther-
mostat, system pressure gauge and an aperture
for an integral clock or programmer. The mode
switch has three positions:
●Reset
●Off
●On
The variable thermostat allows you to set the
temperature of the water to your radiators and hot
water cylinder (not the hot water to your taps!)
between 40ºC (min) and 80ºC (max).
The pressure gauge shows the current pressure
of the 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 shuts off automatically.
Depending on the type of controls specified by
your installer you may have an integral Vokera
time clock or programmer fitted to the appliance,
if so, instructions can be found on pages 6-10. If
an external time clock or programmer has been
fitted, please refer to the instructions supplied
with such.
2.3 LIGHTING THE BOILER
Ensure the gas and electrical supply to the boiler
are turned on.
Turn the mode switch to the ‘on’ position. Refer to
the particular instructions for the type of program-
mer or time clock fitted and ensure there is a
demand for heating and/or hot water. If there is a
room thermostat and/or hot water cylinder ther-
mostat you should ensure these are also calling
for heat.
When there is a demand for heating and/or hot
water via the above controls the boiler will go
through an ignition sequence, whereby the burner
will light.
If the appliance fails to ignite during the ignition
sequence, allow a period of two minutes before
re-setting.
To adjust the output temperature of the appliance
turn the thermostat knob clockwise to increase or
anti-clockwise to decrease.
When the appliance reaches the set temperature,
the burner will go off for minimum period of ap-
proximately 3 minutes.
When the programmer/time clock or external ther-
mostats heating request has been satisfied, the
appliance will switch off automatically.

5Mynute 24m
HOW TO...
3.1 HOW TO TOP-UP THE SYSTEM PRESSURE
(fig. 2)
The system pressure must be checked periodi-
cally 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 follow-
ing instructions as a guide.
●Locate the filling valve connections (external to
the boiler).
●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.
3.2 HOW TO RESET THE APPLIANCE
When the reset light is illuminated the appliance
will require to be reset manually. Using the mode
switch, turn it two clicks to the left (reset position)
then turn it back to the ‘on’ position.
Allow a period of two minutes to elapse before
turning the mode switch to the reset position.
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.
3.3 HOW TO SHUT DOWN THE SYSTEM FOR
SHORT PERIODS
The system and boiler can be shut down for short
periods by simply turning the programmer or time
clock to the off position (see pages 6-10 or the
instructions supplied). It is also advisable to turn
off the main water supply to the house.
3.4 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.
3.5 HOW TO CARE FOR THE APPLIANCE
To clean the outer casing use only a clean
damp cloth. Do not use any scourers or abra-
sive cleaners.
Fig. 2

6Mynute 24m
WHAT IF...
4.1 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.
4.2 WHAT IF I HAVE TO FREQUENTLY TOP-UP
THE SYSTEM
If the system regularly requires topping-up, it may
be indicative of a leak. Please contact your in-
staller and ask him to inspect the system.
4.3 WHAT IF THE RESET LIGHT IS ON
If the reset light is on it indicates that the boiler has
failed to ignite or has overheated, when this
happens the boiler automatically shuts down and
requires to be reset manually (see 3.2).
VOKERA TIMECLOCKS
5.1 VOKERA TIME CLOCK
These instructions relate only to the Vokera me-
chanical time clock. If you have a time clock that
is fitted external to the boiler then you should refer
to the instructions supplied with such. If in doubt,
contact your installer for further advice or assist-
ance.
4.4 WHAT IF THE APPLIANCE IS DUE ITS AN-
NUAL SERVICE
Advice for tenants only
Your landlord should arrange for servicing.
Advice for homeowners
Please contact Vokera Customer Services
05655057 if you would prefer a Vokera service
engineer or agent to service your appliance. Alter-
natively your local Bord Gas approved engineer
may be able to service the appliance for you.
4.5 WHAT IF I NEED TO CALL AN ENGINEER
If you think your boiler may have developed a fault
please contact your installer or Vokera Cus-
tomer Services 05655057 have all your details
to hand including full address and relevant
contact numbers.
Fig. 3
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.
Off
Auto
On

Cod. 10027016 - 28/06 - Ed. 4
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
T0844 391 0999
F0844 391 0998
Vokèra Ireland
West Court, Callan
Co Kilkenny
T056 7755057
F056 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