Boiler Frost Protection; Important Note; To Inspect And Clean The Appliance - Ravenheat HE 80 S Instructions For Use Installation And Servicing

7.1 BOILER FROST PROTECTION

The appliance has a built in frost protection
device that protects the boiler from freezing.
With the gas and electric supplies ON and
irrespective of any room thermostat setting, the
frost protection device will operate the pump
when the temperature falls below 10 °C and
will operate the burner when the temperature
falls below 5°C.
The burner will switch off when the temperature
reaches 27 °C. When the frost protection
device operates "AF" is displayed on the digital
display.

IMPORTANT NOTE:

The system should be protected by incorporating
a system frost thermostat.
To ensure continued efficient operation of
the appliance it is necessary to carry out
servicing and cleaning at regular intervals.
The frequency of servicing and cleaning will
depend upon the particular installation
conditions and usage but in general, once a
year is advisable.
WARNING:
Before the start of any servicing or
replacement of components always
isolate the electricity supply to the
appliance and always turn off the
appliance gas supply at the gas
service cock.
The data badge is positioned low on the
inside left panel.
- The following notes apply to the appliance
and its controls but it should be remembered
that attention must also be paid to the heating
and hot water circuits with special attention to
radiator valves, thermostats, clocks, leaking
hot water taps etc.
- Where it is necessary to replace a gasket that
relies on adhesive for securing - this adhesive
will be supplied with the gasket as a spare
item.
- In all cases prior to servicing, remove the front
panel of the case. Operate the appliance by
turning the hot water services on to a high
water flow. Measurement of the products of
combustion can be achieved by connection
of a probe to the combustion analyser test
point.
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- IMPORTANT:
After completing any servicing or
replacement of gas carrying components
it is essential that a test for gas soundness
is always carried out along with functional
checks in operation.
7.2 TO INSPECT AND CLEAN THE
APPLIANCE
Before carrying out the cleaning
operation, cover the electrical control
panel with a piece of waterproof material
to protect it from debris.
Inspect the heat exchanger for any
blockage. Deposits of any material should
be brushed away using a soft brush.
NOTE: Do not use brushes with metallic
bristles.
Examine internal pipe-work connections
and automatic air vent for any water leaks
and rectify if necessary.
Examine and remove loose debris from Examine and remove loose debris from
the combustion chamber using a soft the combustion chamber using a soft
brush and vacuum cleaner. Carefully flush, brush and vacuum cleaner. Carefully flush,
by spraying water at any remaining debris by spraying water at any remaining debris
through the condensate trap. through the condensate trap.
(Ensure the water is kept away from (Ensure the water is kept away from
electrical components). electrical components).
Inspect the siphonic condensate trap for Inspect the siphonic condensate trap for
a blockage. Remove the cap at the base a blockage. Remove the cap at the base
of the condensate trap. Remove an of the condensate trap. Remove any
debris found. Remove the float to clean it.
Any deposits should be flushed out.
Reassemble and refit the condensing
trap.
When refitting the cap ensure that a
watertight seal is achieved, but do not use
excessive force.
Examine the spark and sensing electrodes
for any mechanical damage. Clean away
any debris and check the spark and sensing
gap.
Examine flue duct and flue manifold and
ensure that there is no obstruction.
Examine the gasket at the entry into the
flue manifold.
It is essential that a good seal is made at
the outlet to the flue manifold, renew this
gasket if there is any sign of damage or
deterioration.