VOKERA Hydra User Instructions
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
5
7
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
Gas Safety (Installations and Use) Regulations.
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.
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
completed during the installation/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
installer by calling CORGI direct on 01256 372300.
Failure to install and commision the appliance in
accordance with the manufacturers instructions
may invalidate the warranty. This does not affect
your statutory rights.
1.5 HOW DOES IT WORK?
Your Hydra boiler is a high efficiency combination
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 (a tap) is opened. The boiler also functions
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
protection system, this enables the boiler to override 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
frost protection be required for the central heating
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
Additional controls such as an external temperature sensor kit or under floor heating safety
thermostat are available as optional accessories
for this appliance. Y ou should consult your installer
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)
The appliance controls are concealed behind the
front cover. To gain access to the controls simply
press the cover inwards to release the catch. The
appliance is equipped with a simple keypad that
can be used to alter the following function:
● the outlet flow temperature to the central heating
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
safe and efficient operation of the appliance is 0.5
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
time clock fitted to the appliance, if so, 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
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.
The boiler will now go through a self-test and
purge sequence indicated by the letter ‘A’ shown
on the left side of the digital display.
2.3.1 ON/OFF MODES (heating)
The heating mode can be switched ON or OFF at
the boiler irrespective of the current time clock
setting. This is indicated by the heating LED (fig. 1).
If the heating LED is illuminated, this indicates
that the heating mode is enabled and is controlled
via the time clock and any external controls such
as a room thermostat.
If the heating LED is unlit, the boiler will not
respond to any heat requests from the time 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
●
c 55
(or any other number, indicating the central
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
if it is below 55ºC, however should a hot water outlet
be opened the boiler will operate in the domestic
hot water mode to supply hot water to the tap.
On completion of the pre-heat function, 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.
When the appliance reaches the set temperature,
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 WA TER 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
re required, when the hot water request has been
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, please allow a period of two minutes before
re-setting.
2.3.5 STATUS LED (fig. 1)
The appliance status LED indicates whether the
boiler is in OFF mode, ON mode or fault condition.
Status LED flashing Green
Indicates the appliance is in the OFF mode, with
electrical supply and frost protection active.
Status LED permanently Green*
Indicates the appliance is ON mode, with heating
or hot water or both activated.
Status LED permanently Red
This indicates that the appliance is in a permanent
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 ADJUSTING THE OPERATING PARAMETERS
Usually your installer will have adjusted the
operating temperatures to suit your requirements,
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);
● use the
+
or - button to adjust the operating
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);
● use the
+
or - button to adjust the operating
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
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