VOKERA Hydra User manual

Users
Instructions
THESE INSTRUCTIONS
TO BE RETAINED
BY USER
Unit 3A, Thornton Road Ind. Estate Off Hockney Road Bradford, BD8 9HQ
01274 488 388
www.heatingspares247.com

2
Dear Customer
Your Vokera Hydra 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
●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.
Contents
Introduction Page
Dear customer 2
Do’s and don’t’s 2
Things you should know Page
1.1 Gas appliances 3
1.2 Electrical supply 3
1.3 Guarantee registration card 3
1.4 Benchmark log book 3
1.5 How does it work? 3
1.6 Dimensions 3
1.7 Clearances required 3
1.8 Frost protection system 3
1.9 Additional controls 3
Getting started Page
2.1 Before switching on 3
2.2 Appliance controls 3
2.3 Lighting the boiler 4
2.4 Adjusting the operating temperature 4
2.5 Digital display 5
2.6 Fault code table 5
How to... Page
3.1 Top-up the system pressure 6
3.2 Reset the appliance 6
3.3 Shut down the system for short periods 6
3.4 Shut down the system for long periods 6
3.5 Care for the appliance 6
3.6 Regulate the hot water temperature 6
What if... Page
4.1 I suspect a gas leak 7
4.2 I frequently have to top-up the system 7
4.3 The status led is red 7
4.4 The appliance is due its annual service 7
4.5 I need to call an engineer 7
Setting the Vokera Page
5.1 Mechanical clock 8
5.2 Digital clock 8
INTRODUCTION
Fig. 1
1= hot water selection
2= increase button
3= mode button
4= digital display
5= hot water LED
6= status LED
7= heating LED
8= reset button
9= decrease button
10= heating selector
11= clock aperture
12= pressure gauge
1
2
3
4
6
8
9
10
11
12
57
Unit 3A, Thornton Road Ind. Estate Off Hockney Road Bradford, BD8 9HQ
01274 488 388
www.heatingspares247.com

3
THINGS YOU SHOULD KNOW
1.1 GAS APPLIANCE
GasSafety(InstallationsandUse)Regulations.
Intheinterestsofyoursafetyandthatofothersit
is a legal requirement that all gas appliances are
installedandcorrectlymaintainedbyacompetent
person and in accordance with the latest
regulations.
1.2 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!
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 BENCHMARK LOG BOOK
The Benchmark Log Book is supplied with your
boiler. This important document must be
completedduringtheinstallation/commissioning
of your boiler. All CORGI Registered Installers
carry a CORGI ID card and have a registration
number. Both should be recorded in your
Benchmark Log Book. You can check your
installerbycallingCORGIdirecton01256372300.
Failure to install and commision the appliance in
accordance with the manufacturers instructions
mayinvalidate the warranty. This does not affect
your statutory rights.
1.5 HOW DOES IT WORK?
YourHydraboilerisahighefficiencycombination
boiler, which supplies heated water to your
radiators and hot water to your taps.
The central heating is controlled via a time clock
and/or any thermostats that your installer may
have fitted. The boiler will light when a hot water
outlet(atap)isopened.Theboileralsofunctions
periodically to pre-heat the hot water heat
exchanger. The Hydra 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.
1.6 DIMENSIONS
HEIGHT
WIDTH
DEPTH
820 mm
450 mm
355 mm
1.7 CLEARANCES REQUIRED
ABOVE
BELOW
SIDES
FRONT
150 mm
120 mm
25 mm
600 mm
1.8 FROST PROTECTION SYSTEM
The Hydra is equipped with a built-in frost
protectionsystem,thisenablestheboilertoover-
ride the time controls – if switched off – and
operate the burner and/or pump, should the
temperature drop below 7 °C.
Please note that the frost protection system is
designed to protect the appliance only, should
frostprotectionberequiredforthecentralheating
system, additional controls may be required.
NOTE
The frost protection system is reliant on the
appliance having a permanent electrical supply,
and being in a non-fault condition.
1.9 ADDITIONAL CONTROLS
Additionalcontrolssuchasanexternaltempera-
ture sensor kit or under floor heating safety
thermostatareavailableasoptionalaccessories
forthisappliance.Youshouldconsult yourinstaller
and/or the supplementary instructions supplied,
on their use (if installed).
GETTING STARTED
2.1 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;
●any external thermostats and their functions;
●the appliance controls.
2.2 APPLIANCE CONTROLS (fig. 1)
Theappliancecontrolsareconcealedbehindthe
frontcover.Togainaccess tothecontrols simply
pressthecoverinwardstoreleasethecatch.The
appliance is equipped with a simple keypad that
can be used to alter the following function:
●theoutletflowtemperaturetothecentralheating
system;
●the outlet flow temperature for domestic hot
water
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
safeandefficientoperationoftheapplianceis0.5
bar. Should the pressure fall below 0.5 bar, the
boiler may lockout.
Depending on the type of controls specified by
your installer you may have an integral Vokera
timeclockfittedtotheappliance,ifso,instructions
can be found on page 8-9. If an external time
Unit 3A, Thornton Road Ind. Estate Off Hockney Road Bradford, BD8 9HQ
01274 488 388
www.heatingspares247.com

4
clockorprogrammerhasbeenfitted,pleaserefer
to the instructions supplied with such.
2.3 LIGHTING THE BOILER
Ensurethegasandelectricalsupplyto the boiler
are turned on.
The boiler will now go through a self-test and
purgesequenceindicatedbythe letter ‘A’shown
on the left side of the digital display.
2.3.1 ON/OFF MODES (heating)
TheheatingmodecanbeswitchedONorOFFat
the boiler irrespective of the current time clock
setting.ThisisindicatedbytheheatingLED(fig.1).
If the heating LED is illuminated, this indicates
thattheheatingmodeisenabledandiscontrolled
viathe time clock and any external controls such
as a room thermostat.
If the heating LED is unlit, the boiler will not
respondtoany heat requestsfromthetime clock
or room thermostat etc.
To switch the heating mode ON or OFF, press
and hold the button (fig. 2) whilst looking at
the digital display:
● c OF indicates the heating mode is switched
OFF
● c55 (oranyothernumber,indicatingthecentral
heating operating temperature), indicates the
heating mode is switched ON.
2.3.2 ON/OFF MODES (hot water)
The hot water mode can be switched ON or OFF
at the boiler. This is indicated by the hot water
LED (see fig. 1).
If the hot water LED is illuminated, this indicates
that the hot water mode is enabled.
If the hot water LED is unlit, the boiler will not
respond to any hot water requests whenever a
hot water outlet (tap) is opened.
To switch the hot water mode ON or OFF, press
and hold the button (fig. 3) whilst looking at
the digital display:
● d OF indicates the hot water mode is switched
OFF
● d 40 (or any other number, indicating the
domestic hot water operating temperature),
indicates the hot water mode is switched ON.
The boiler will pre-heat the DHW heat exchanger
ifitisbelow55ºC,howevershouldahotwateroutlet
be opened the boiler will operate in the domestic
hot water mode to supply hot water to the tap.
Oncompletionofthepre-heatfunction,the boiler
will revert to the stand-by mode indicated by ‘0’
shown in the left side of the digital display.
2.3.3 HEATING REQUEST
When there is a demand for heating via the time
clock, the boiler will go through an ignition
sequence, whereby the burner will light.
Whentheappliancereachesthesettemperature,
the burner will go off for minimum period of
approximately 90 seconds.
When the programmer/time clock or external
thermostats heating request has been satisfied,
the appliance will switch off automatically.
2.3.4 HOT WATER REQUEST
When a hot water outlet or tap is opened, the
boiler senses a change of inlet temperature and
initiates an ignition sequence. The boiler will
modulate the output according to the temperatu-
Fig. 2
rerequired,whenthehot water requesthasbeen
satisfied, the boiler may continue to operate if
the pre-heat function is required.
NOTE
If the appliance fails to ignite during the ignition
sequence, it will re-attempt ignition several times
before going to a lockout condition. Should this
occur,pleaseallowaperiodoftwominutesbefore
re-setting.
2.3.5 STATUS LED (fig. 1)
The appliance status LED indicates whether the
boilerisin OFFmode,ON modeorfaultcondition.
Status LED flashing Green
Indicates the appliance is in the OFF mode, with
electrical supply and frost protection active.
Status LED permanently Green*
IndicatestheapplianceisONmode, with heating
or hot water or both activated.
Status LED permanently Red
Thisindicatesthat theapplianceis inapermanent
fault condition and may require to be reset
(indicated by the relevant fault code displayed)
see 2.6.
*Also illuminated during a temporary fault
condition.
2.4 ADJUSTINGTHEOPERATINGPARAMETERS
Usually your installer will have adjusted the
operatingtemperaturestosuityourrequirements,
however should you wish to view or alter them,
please use the following procedure:
Central heating temperature
●to view or alter the heating operating
temperature, briefly press the button;
●the central heating LED will now flash and the
operating temperature will be shown on the
right side of the display (see fig. 2);
●usethe
+
or
-
buttontoadjusttheoperating
temperature if required;
●press the button to save the new setting.
Hot water temperature
● to view or alter the hot water operating tempe-
rature, briefly press the button;
●the hot water LED will now flash and the
operating temperature will be shown on the right
side of the display (see fig. 3);
●usethe
+
or
-
buttontoadjust theoperating
temperature if required;
●press the button to save the new setting.
Unit 3A, Thornton Road Ind. Estate Off Hockney Road Bradford, BD8 9HQ
01274 488 388
www.heatingspares247.com

5
Current status
Stand-by mode
Purging
Ignition
Heating mode
Hot water mode
Fan operation
Timer delay
Pump over run (CH)
Pump over run (HW)
Self check
Left display shows
0
1
2
3
4
5
6
7
8
A
Reason
Ignition anomaly
No flame detected
Internal fault
Power failure
Internal fault
Internal fault
Internal fault
Internal fault
Appliance overheat
Internal fault
Internal fault
Internal fault
Internal fault
Internal fault
Appliance overheat
Appliance overheat
Appliance overheat
Appliance overheat
Temperature anomaly
Temperature anomaly
Temperature anomaly
Condensate pipe blocked
Insufficient fan speed
Fan problem
Fan speed problem
Fan problem
Temperature anomaly
Temperature anomaly
Internal fault
Internal fault
Internal fault
Internal fault
Internal fault
Internal fault
Internal fault
Programming fault
Insufficient fan speed
Code
E 00
E 02
E 03
E 04
E 05
E 06
E 07
E 11
E 12
E 13
E 14
E 15
E 16
E 17
B 18
E 18
B 19
E 19
B 24
B 25
E 25
B 26
B 28
E 28
B 29
E 29
B 30
E 30
E 31
E 32
E 33
E 36
E 37
E 38
E 44
E 60
B 65
2.6 FAULT CODE TABLE
Action required
Reset appliance, if fault continues, call engineer
Check gas is on, reset appliance, if fault continues, call engineer
Call engineer
Reset appliance, if fault continues, call engineer
Call engineer
Call engineer
Call engineer
Call engineer
Reset appliance, if fault continues, call engineer
Call engineer
Call engineer
Call engineer
Call engineer
Call engineer
Ensure radiators are on
Reset appliance, if fault continues, call engineer
Ensure radiators are on
Reset appliance, if fault continues, call engineer
If fault continues, call engineer
Check pressure gauge
Check pressure gauge, reset appliance, if fault continues, call engineer
Check outlet of condense pipe, if problem persists, call engineer
If fault continues, call engineer
Reset appliance, if fault continues, call engineer
If fault continues, call engineer
Reset appliance, if fault continues, call engineer
Check pressure gauge
Check pressure gauge, reset appliance, if fault continues, call engineer
Call engineer
Call engineer
Call engineer
Call engineer
Call engineer
Call engineer
Call engineer
Call engineer
If fault continues, call engineer
2.5 DIGITAL DISPLAY
The digital display shows the current mode of
operation and/or status of the boiler.
Should a fault develop, the display will show a
uniquefaultcode thatcanbeused tohelprectify
the cause of the fault.
During the normal operation, the left side of the
display indicates the current mode of operation,
whilst the right side will show the current
temperature.
Fig. 3
Should a fault occur, the left side of the display
will show whether the fault is temporary or
permanent(indicatedby‘b’or‘E’),whilsttheright
side of the display indicates the unique fault
code.
Should a fault code be displayed, check the
fault code table to identify the cause and
course of action to take.
Always wait 2-minutes before pressing the
reset button.
Displays during normal operation
Unit 3A, Thornton Road Ind. Estate Off Hockney Road Bradford, BD8 9HQ
01274 488 388
www.heatingspares247.com

6
HOW TO...
3.1 HOW TO TOP-UP THE SYSTEM PRESSURE (fig. 4)
Thesystempressuremustbecheckedperiodically
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.
●Locatethefilling/inletvalvefoundatbaseofthe
boiler (see fig. 4 & fig. 5).
●The fillig loop (fig. 4) may have been
disconnected from the filling/inlet valve and
heating flow valve. If so reconnect unscrewing
the caps as necessary.
●The filling valve has 3 positions (see fig.5):
i) Vertically up - normal operating position.
ii)Turntotheleftto horizontal - closed position.
iii) Vertically down - filling position.
To fill, slowly turn the handle of the filling/inlet
valve towards the filling position. Mains water
will be heard to enter the system/boiler.As the
water enters the system/boiler the pressure
gauge will be seen to rise. Pressurise to be-
tween 1bar & 1.5 bar when the system is cold.
DO NOT OVERPRESSURISE.
Oncethedesiredpressureisachievedturnthe
filling/inlet valve into the normal position.
3.2 HOW TO RESET THE APPLIANCE
When the status light is illuminated red, the
appliancewillrequiretoberesetmanually.Before
resetting the boiler ensure that the pressure
gauge is indicating the correct level. Allow a
period of two minutes to elapse before pressing
the reset button.
IMPORTANT
If the appliance requires to be reset frequently, it
may be indicative of a fault, please contact your
installerorVokeraCustomerServicesforfurther
advice.
3.3 HOW TO SHUT DOWN THE SYSTEM FOR
SHORT PERIODS
Turn the time clock to the off position. Switch the
boilertoOFFmode (see section2.3.1&2.3.2).It
isalsoadvisabletoturn offthemainwatersupply
to the house.
3.4 HOW TO SHUT DOWN THE SYSTEM FOR
LONG PERIODS
Ifthehouseistobeleftunoccupiedforanylength
oftime–especiallyduringthewinter–thesystem
should be thoroughly drained of all water.
Thegas,waterandelectricitysupplytothehouse
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 abrasive
cleaners.
normal
operating
position
filling
position
closed
position
Fig. 5
Fig. 4
Heating valves
Filling loop
Filling/
inlet valve
Gas cock
3.6 HOW TO REGULATE THE HOT WATER TEM-
PERATURE
Usually your installer will have adjusted the hot
water output to suit your requirements, however
ifyouwouldliketoadjusttheoutlettemperature,
please follow the instructions in section 2.4.
NOTE
If you find that the hot water temperature is still
insufficient,try reducing the flowofwaterthrough
the tap.
Unit 3A, Thornton Road Ind. Estate Off Hockney Road Bradford, BD8 9HQ
01274 488 388
www.heatingspares247.com

7
CORGIregisteredengineermaybeabletoservice
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
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.
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 FREQUENTLY TO TOP-UP
THE SYSTEM
Ifthesystemregularlyrequirestopping-up,itmay
beindicativeofaleak.Pleasecontactyourinstaller
and ask him to inspect the system.
4.3 WHAT IF THE STATUS LED IS RED
If the status led is illuminated red it indicates that
the boiler has failed to ignite or has overheated,
whenthis happenstheboilerautomaticallyshuts
downandrequirestoberesetmanually(see3.2).
4.4 WHAT IF THE APPLIANCE IS DUE ITS
ANNUAL SERVICE
Advice for tenants only
Your landlord should arrange for servicing.
Advice for homeowners
PleasecontactVokeraCustomerServices(0870
333 0220 (UK) or 05655057 (ROI) if you would
prefer a Vokera service engineer or agent to
service your appliance. Alternatively your local
Unit 3A, Thornton Road Ind. Estate Off Hockney Road Bradford, BD8 9HQ
01274 488 388
www.heatingspares247.com

8
5.2.1 BEFORE PROGRAMMING
Gentlypress and release the ‘Res.’ button with a
pencil or similar, this will clear the memory of all
information. This should only be done when you
want to change or insert a complete new
programme.
5.2.2 SETTING THE TIME OF DAY
The ‘real time’ clock has to be set to the actual
day of the week and time of day, to do this:
●Press and hold the button (see fig 7).
●Press the ‘Day’ button until the actual day
shows in the display (1= Monday, 2= Tuesday,
3= Wednesday, etc.).
●If setting the clock during ‘British summertime’
press the ‘+/-1h’ button once (use a pencil or
similar).
●Press the ‘h’ button until the actual hour is
shown in the display.
●Press the ‘m’ button until the actual minutes
are showing in the display.
●Now release the button.
●The ‘:’ symbol between the hours and minutes
display will start to flash, this indicates that the
clock is now keeping time (see fig. 8).
5.2.3 ENTERING (on) COMMANDS
●Repeatedly press the Prog. Button until the —
:— symbol appears in the clock display (see
fig. 9).
●Press the Day button until the desired group of
days or desired day is shown.
●Press the ‘h’ button until the desired hour for
switching the boiler on is shown.
5.1 VOKERA MECHANICAL CLOCK
Setting the time
The time of day can be set by grasping the outer
edgeoftheblackdialandturningitinaclockwise
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,adjacentto 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.
Toselect‘Timed’modemovetheselectorswitch
inthemiddleoftheclockfacetothe ‘ ‘ position.
To select ‘Constant’ mode move the selector switch
in the middle of the clock face to the ‘I’ position.
To select ‘Off’ mode move the selector switch in
the middle of the clock face to the ‘O’ position.
5.2 VOKERA DIGITAL CLOCK
The Vokera digital time clock will automatically
switch your boiler on and off. It has a total of
twentydifferent switchingcommands,consisting
of ten ‘on’ commands and ten ‘off’ commands.
Each‘on’or ‘off’commandcanbeusedtoswitch
the boiler ‘on’ or ‘off’ at the same time:
●Every day of the week
●Monday to Saturday
●Monday to Friday
●Saturday and Sunday
●Any particular day
Group of days On Off Commands
used
Mon. to Fri. 06.00 09.00 2
Mon. to Fri. 16.00 21.00 2
Sat. & Sun. 08.30 10.30 2
Sat. & Sun. 17.00 23.00 2
Total 8 used
Commands ‘free’ 12 unused
Example
Fig. 6
Select button
Reset button “British summertime”
button
Hour button
Minute button
Display
Day button
Programme
button
Clock button
VOKERA DIGITAL TIME CLOCK
VOKERA TIMECLOCKS
Fig. 5
ON period
OFF period
Selector
switch
Fig. 7 Fig. 8
Unit 3A, Thornton Road Ind. Estate Off Hockney Road Bradford, BD8 9HQ
01274 488 388
www.heatingspares247.com

9
●Press the ‘m’ button until the desired minutes
are shown.
●Press the Select button until the symbol is
shown (see fig. 10).
●Press the button.
5.2.4 ENTERING (off) COMMANDS
●Repeatedly press the Prog. Button until the —
:—symbolappears in the clock display (fig. 5).
●Press the Day button until the desired group of
days or desired day is shown.
●Press the ‘h’ button until the desired hour for
switching the boiler off is shown.
●Press the ‘m’ button until the desired minutes
are shown.
●Press the Select button until the symbol is
shown (see fig. 11).
●Press the button.
Oncetheprogramminghasbeencompletedyou
will have to press the Select button – once only
– to the (on) position if the boiler has been
programmed to be ‘on’ at that particular time.
5.2.5 ADVANCING OR LOCKING PROGRAMME
COMMANDS
By pressing the Select button you can advance the
time clock to the next command setting (from ‘on’ to
‘off’or ‘off’ to ‘on’) or lock the time clock to a particular
command (‘on’continuously or ‘off’continuously).
●- ON
●- OFF
●[] – ON CONTINUOUSLY
●[] – OFF CONTINUOUSLY
NOTE
The actual time can be changed to account for
British summertime by simply pressing then re-
leasing the +/- 1h button.
HELPFUL HINTS
●You can check and/or alter the programme
settingsatany timebypressing theProgbutton.
●Thenumberofunused‘commands’canbechecked
by pressing the Prog button until FR is displayed
alongside the number of unused commands.
●In the event of a power failure, the clock has a
battery back-up. The programme will be held
in the memory for approximately 2 weeks.
Charging time is 70 hours.
●Take a note of the settings you have pro-
grammed, as local power surges can some-
times reset the memory of the clock.
Fig. 9 Fig. 10
Fig. 11
Unit 3A, Thornton Road Ind. Estate Off Hockney Road Bradford, BD8 9HQ
01274 488 388
www.heatingspares247.com

10
NOTE
Unit 3A, Thornton Road Ind. Estate Off Hockney Road Bradford, BD8 9HQ
01274 488 388
www.heatingspares247.com

Unit 3A, Thornton Road Ind. Estate Off Hockney Road Bradford, BD8 9HQ
01274 488 388
www.heatingspares247.com

Vokèra Ltd.
4th Floor, Catherine House, Boundary Way, Hemel Hempstead, Herts, HP2 7RP
Email: [email protected] Web: www.vokera.co.uk
Sales, Technical Advice, General Enquiries - Tel: [phone] Fax: [phone]
After Sales Service - Tel: [phone]
Vokèra Ireland
West Court, Callan, Co Kilkenny
Tel: [phone] Fax: [phone]
Vokèra Ltd. reserve the right to change the specifications without prior notice. Consumers’ statutory rights are not affected.
A Riello Group Company
energizing home heating
“Vokèra”
supports Benchmark
COLLECTIVE MARK
Cod. 10023776 - 49/03 - Ed. 2
Unit 3A, Thornton Road Ind. Estate Off Hockney Road Bradford, BD8 9HQ
01274 488 388
www.heatingspares247.com