VOKERA Compact HE, User Instruction

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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.
1.1 GAS APPLIANCE
Gas safety (Installation 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 EXPLANATION OF CONTROLS
The Vokera Compact HE has been designed for
simplicity of use, as a result there are only two
controls - the mode selector switch & the time
clock - that can be accessed by the user.
1.3.1 MODE SELECTOR SWITCH AT:
OFF:
when the mode selector switch is in the
‘OFF’ position, the appliance will not function for
hot water or heating. However the appliance will
still operate in frost protection mode, and if unused
for a period of 24 hours, will momentarily activate
the pump and valve actuator to prevent seizure
due to non-use.
NOTE
The appliance must have an electrical supply at
all times for the frost protection and anti-seize
modes to operate.
1.3.2 HOT WATER ONLY “ ” : when the mode
selector switch is in the ‘HOT WATER ONLY’
position, the appliance will operate as above.
However when a hot water outlet is opened the
appliance will operate to provide hot water until
the demand for hot water has been satisfied.
NOTE
The appliance delivers a fixed maximum flow rate
of hot water, therefore if a hot water outlet is
turned on full, it is most likely that you will be
unable to obtain hot water from another outlet at
the same time.
1.3.3 HEATING AND HOT WATER “ ” : when
the mode selector switch is in the ‘HEATING AND
HOT WATER’ position the appliance will operate
as above. However should the time clock be
switched on automatically or manually, the
appliance will operate to provide heat to the central
heating circuit until the demand has been satisfied.
NOTE
If a room thermostat is fitted it must be calling for
heat before the appliance will operate.
1.3.4 TIME CLOCK
The Vokera Compact HE is supplied with a built-
in, 24-hour, time clock that can be set to operate
the appliance for central heating. However it may
be that your installer has fitted an external time
clock (usually because of the location of the
appliance i.e. loft, basement, outhouse, etc.) if
so, please disregard the following instructions
and refer to those supplied with the external time
clock.
1.4 EXPLANATION OF FEATURES
Although the Vokera Compact HE has been
designed for simplicity of use, it utilises the latest
in boiler technology, enabling a host of functions
to be carried out simultaneously.
1.4.1 FROST PROTECTION MODE
This function is only active when there are no
requests for heating or HW. When the temperature
inside the appliance drops below 5 °C, the boiler will
operate on minimum output until the temperature -
within the appliance - reaches 35 °C.
1.4.2 AUTOMATIC TEMPERATURE CONTROL
The automatic temperature control function
(SARA), permits the boiler (when the heating
temperature selector is set within the AUTO
sector) to automatically adjust (raise) the heating
flow outlet temperature during inclement weather.
THINGS YOU SHOULD KNOW
Off ’
Auto
On
Fig. 2