VOKERA Mynute EHE, User Instructions

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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 cor-
rectly maintained by a competent person and in accordance
with the latest regulations.
1.2 ELECTRICAL SUPPLY
Please ensure that this appliance has been properly con-
nected 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 control panel includes a boiler thermostat, ON/OFF/
RESET switch, pressure gauge and status LED.
1.3.1 SELECTOR SWITCH AT:
OFF: when the 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 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.
ON: when the selector switch is in the ON position, and any
external controls such as time switch, room thermostat,
cylinder thermostat are calling for heat, the boiler will oper-
ate to provide heating and/or hot water until the demand has
been satisfied.
These instructions should be read in conjunction with any
other instructions for controls that may have been fitted by
your installer.
THINGS YOU SHOULD KNOW
1.4 EXPLANATION OF FEATURES
Although the Mynute EHE 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. 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.
1.4.3 ANTI-SEIZE FUNCTION
Should the appliance remain inactive for a period of 24
hours, the pump will be activated for a few seconds to prevent
seizure.
1.4.4 APPLIANCE STATUS INDICATORS
The Mynute EHE has status indicators that show if the
appliance is working normally, if it needs ‘topping up’ or re-
pressurising, or if it has a fault (see below).
1.5 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.
2.1 BEFORE SWITCHING ON
Before switching the appliance on please familiarise your-
self 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 thermostat,
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.
GETTING STARTED
Depending on the type of controls specified by your in-
staller you may have an integral Vokera time clock or
programmer fitted to the appliance, if so, instructions can
be found on page 6. 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 programmer 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 thermostat 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 se-
quence, 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 approximately 3
minutes.
When the programmer/time clock or external thermostats
heating request has been satisfied, the appliance will
switch off automatically.