3
221899A
Introduction
Please read these instructions and follow them carefully for the
safe and economical use of your boiler.
The Micron series are fanned flue boilers designed to provide
central heating and indirect domestic hot water.
The boiler is fully automatic in operation having only one user
control, the temperature control.
WARNING. It is important that the case is not disturbed or
removed other than for servicing by a competent person.
Gas Leak or Fault
If a gas leak or fault exists or is suspected, the boiler must be
turned off, including the electrical supply and must not be used
until the fault has been put right.
Advice/help should be obtained from your installation/servicing
company or the local gas undertaking.
Electrical Supply Failure
Failure of the electrical supply will cause the burner to go out.
Should this occur, operation of the appliance will normally
resume after the electrical supply is restored.
Note: If the boiler is switched OFF, manually, wait at least 30
seconds before switching on again.
Safety Temperature Limiter
If the overheat Safety Temperature Limiter operates as indicated
by illuminated reset light, open the controls cover and turn
temperature control to “0” (anticlockwise) and then back to
original position, refer to diagram 9.1. If the overheat operates
again, turn the appliance off and contact your installation/
servicing company.
Protection Against Freezing.
If the boiler is to be out of use for any long period of time during
severe weather conditions we recommend that the whole of the
system, including the boiler, be drained off to avoid the risk of
freezing up. Make sure that, if fitted, the immersion heater in the
cylinder is switched off. Alternatively, there is a built-in frost
protection which will cause the boiler when it is switched off at
the control knob to operate in the event of the water temperature
in the boiler dropping to 6
o
C or 7
o
C. The boiler will switch off
again when the temperature of the water in the boiler reaches
about 15
o
C. This will only be fully effective if the external
controls are set so that the pump runs continuously, that is they
are calling for heat.
Note: The frost protection will not operate if the electrical supply
is turned off.
Maintenance
To ensure the continued efficient and safe operation of the
boiler it is recommended that it is checked and serviced as
necessary at regular intervals. The frequency of servicing will
depend upon the particular installation conditions and usage,
but in general once a year should be enough.
If this appliance is installed in a rented property there is a duty
of care imposed on the owner of the property by the current
issue of The Gas Safety (Installation and Use) Regulations,
Section 35.
It is the law that any servicing is carried out by a competent
person.
To obtain service, please call your installer or Heatcall (Glow-
worm’s own Service Organisation) using the telephone number
given on the front cover of these instructions.
Please be advised that the ‘Benchmark’ logbook should be
completed by the installation engineer on completion of
commissioning and servicing.
Instructions for Use
All CORGI Registered Installers carry a CORGI ID card, and
have a registration number. Both should be recorded in your
boiler Logbook. You can check your installer is CORGI registered
by calling CORGI direct on :- 01256 372300.
Cleaning
WARNING. This appliance contains metal parts (components)
and care should be taken when handling and cleaning, with
particular regard to edges.
Clean the casing occasionally by wiping it over with a damp
cloth or dry polishing duster.
Do not use an abrasive cleaner.
To Light the Boiler
WARNING. Sealed Systems
A sealed water system must be filled and pressurised by a
competent person.
Only light the boiler when you are sure that the system has been
filled and pressurised.
The pressure gauge should show at least 0.7bar, anything less
than this figure could indicate a leak and you MUST contact your
installation/servicing company.
If there is any doubt about the boiler being full of water consult
your installation/servicing company.
ALL SYSTEMS.
Turn the electrical supply on to the boiler and check that all
remote controls are calling for heat. Check also that the
programmer (if fitted) is in the “ON” mode.
To Turn the Boiler On
Open the controls cover, see diagram 9.1.
Turn the control knob clockwise to any position between “0” and
MAX. The maximum temperature setting is about 82
o
C (180
o
F),
see diagram 9.1.
The boiler lighting operation is now automatic as follows:
The fan operates and after a short period of time, the spark
ignition operates, the solenoid opens, then the burner will light
shown by the “Burner On” neon on the control panel lighting up.
The burner will remain alight until switched off by the control
thermostat, any remote control or the programmer.
Note: If the boiler is switched OFF, by hand, wait at least 30
seconds before switching on again.
When the boiler switches off, the burner will go out.
The automatic lighting sequence will operate again when heat
is required.
Shut the controls cover.
To Turn the Boiler Off
For short periods, turn the control knob anti-clockwise to “0” Off.
To relight, turn the control knob to any position between “0” and
“MAX”.
For longer periods, turn the control knob fully anti-clockwise to
“0” Off and switch off the electrical supply to the boiler.
To relight follow the lighting sequence given above.
Optional Programmer
A programmer is available, which will automatically switch your
central heating system on and off once or twice a day at
whatever times you choose.
