5
1. OPERATION
A = Gas economizer on/off
● off position
pilot position
minimum gas level
maximum gas level
B = Water temperature selector
Minimum Temperature
Maximum Temperature
g. 1
A
B
1.a. Function
The water heater is designed to produce instantaneous hot
water. The hot water is delivered to several outlets around the
home. If more than one outlet is used at any one time the delivery
of hot water will be reduced at each outlet. The Water heater has
2 main controls:
- A gas control knob - “A” in g 1
- A water temperature control knob – “B” in g 1
The minimum gas level in g. 1 will provide approximately 50%
of the available power. Turning the gas control knob counter-
clockwise will increase the power level between 50% and 100%.
This function may be useful to vary the temperature of the water
supplied.
The water temperature selector allows water to be supplied
anywhere between 50% and 100% of the water heater’s capabili-
ty. In effect the selector reduces the water ow through the heater
to the taps to increase the water temperature and correspondin-
gly increases the water ow to reduce the water temperature.
In the UK the normal positions for the controls are:
- Gas control – always set to 100% (fully counter clockwise)
- Water control set to 100% (fully clockwise) during the winter
months
- Water control set to between 100% and 50% during the sum-
mer months to suit the customer’s preference for hot water
temperature
1.b Usage
Ensure that the appliance gas isolation valve and all water taps
are switched off
- Turn on the main external gas supply on the bottle or tank
- Light other gas appliances such as the cooker hob or re and
allow them to run for 30 seconds- this is to purge the gas system
of air
- Open the appliance gas isolation valve, placed immediately
below the water heater on the gas input pipe
- Rotate knob A to the pilot position (), press the knob down all
the way and keep it pressed
- Press the piezo electric button that is located under the water
heater until the spark ignites the pilot ame. The ame can be
seen through the viewing hole on the front of the heater by
looking slightly upwards and to the left. When it ignites, keep
the gas control knob (“A” in g 1), pressed for 20-30 seconds.
If the pilot does not stay lit when the knob is released, repeat
the procedure
- Rotate Knob A towards the large ame ( ), during rotation it is
necessary to keep the knob pressed down lightly until the nal
position is reached
- From this moment the device is able to produce hot water on
request. Opening the hot water tap causes the main burner to
be ignited, and inversely, by closing the hot water tap the main
burner is switched off; but the pilot ame remains switched on
for future requirements
- If the main burner or pilot ame is accidentally turned off, the
gas valve automatically blocks the output of gas within 60 se-
conds so to avoid any danger. To return the device to an ope-
rational mode, repeat the steps above
The machine is switched off by rotating knob A to the OFF posi-
tion (●).
When the water heater is not used for long periods close the
appliance gas isolation valve or the LPG gas valve on the bottle/
tank.
For the best operational results it is recommended to have a Gas
Safe Engineer or other qualied personnel service the machine
at least once a year.
PRECAUTIONS TO BE TAKEN AGAINST FROST AND FREE-
ZING CONDITIONS
If there is a possibility that the area where the appliance is in-
stalled could reach below 0°C, the device must be emptied of
all water.
During cold spells, if your appliance is located in a place exposed
to frost and freezing conditions, it must be drained down in the
following way:
- Turn off the home’s water inlet stop tap.
- Disconnect the water supply pipe from the home
- Open any drain cocks located on the hot/cold water pipework
under the home
- Turn on all hot and cold water taps
- Turn appliance water temperature selector fully anticlockwise
- Disconnect the cold water inlet to the water heater
- Full details of winterisation can be found under “troubleshoo-
ting” at www.morcoproducts.co.uk
- A summary can be found on page 13 of this manual
To use the appliance again reverse the above procedure
Min temp
Max temp
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