Fault Finding - gledhill BoilerMate BP Installation & Service Manual

SERVICING
Despite everyones best eff orts some problems could occur and lead to complaints
from the householder.
Complaints can be grouped into the following three main categories:-
1. The system is noisy
2. Hot water service is unsatisfactory
3. Space heating is unsatisfactory
The following checks should be carried out by the installer before calling the manufacturer.
1. Causes of a 'Noisy' System
Noisy pump operation
Check the level of water in the F & E cistern - adjust and vent the pump/system if
necessary.
Check heating circuit pressure - fi ll it to 1.5 bar and vent if necessary.
Check the pump speed setting of the boiler/heating pump - reduce if necessary but
ensure that the temperature rise across the system is about 11°C.
Check the operation of the 3 port valve.
Check and adjust if necessary the heating system bypass valve.
Check that the radiators are correctly balanced.
Noisy boiler operation
Check the fl ow rate through the boiler at full gas rate by measuring the temperature
rise across the boiler. If the temperature rise is greater than 11°C, then increase the
pump speed.
Check system pressure, top up the expansion vessel - and vent if necessary.
Check and vent the system if necessary.
Noise when hot water tap is opened
If the plate heat exchanger pump is noisy when the hot water tap is opened, then
check the level of water in the F & E cistern and vent the pump if necessary.
Water hammer - loose pipework and/or tap washers.
2. Causes of 'Unsatisfactory Hot Water Service'
Check that the BoilerMate is full of water i.e. level of water in the F & E cistern is correct
when system is cold.
Check boiler thermostat - this should be set at maximum.
Check that the boiler fl ow temperature is adequate when it stops fi ring. Boilers should
provide a fl ow temperature of 82 ± 3°C but temperatures as low as 75°C will allow the
BoilerMate BP to provide a satisfactory performance.
Check that the store is charging to at least 75°C.
Check that the thermostatic blending valve is set to decline water between 55°C-57°C.
If all the above checks are satisfactory then it is possible that the performance of
the heat exchanger is impaired by scale. In this case the hot water fl ow rate will be
noticeably less than the cold water fl ow rate. The heat exchanger can be descaled in
situe. Contact the Technical Helpline for more details.

FAULT FINDING

3. Causes of 'Unsatisfactory Space Heating'
Check the boiler thermostat - this should be
set at maximum.
Check that the boiler fl ow temperature before
it is turned off by its own internal thermostat
or the store sensor is adequate - it should not
be less than 77°C.
Check the operation and the settings of the
heating programmer and the room thermostat.
Check that the boiler/heating system pump is
working and the 3 port valve is allowing water
to the radiator circuit.
If some rooms are not being heated properly,
then balance the system/check the operation
of the thermostatic radiator valves (if fi tted).
Overfl ow from Feed and Expansion Cistern
Check that the controlled level of water in the
cistern is no higher than necessary. Adjust if
required.
Powerflushing/cleaning Of The Heating
System
When carrying out the work always comply
fully with the manufacturers instructions for the
powerfl ushing equipment being used.
If in any doubt please consult our Technical
Helpline.
W h e n r e q u e s t i n g a v i s i t f r o m t h e
manufacturer the installer must have the
completed 'Benchmark' commissioning/
service record sheet to hand to enable help
to be provided.
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