Fault Finding - Benchmark Accolade ACA125 IND Design, Installation And Servicing Instructions

3.0 SERVICING

3.4 FAULT FINDING

SCALE
In accordance with the Benchmark Guidance Notes in hard water areas,above 200ppm
(mg/l) it is recommended that an in-line scale reduction device is fitted. Reducing the
temperature of the stored water will reduce the rate at which scale forms but must not
be reduced to less than 60°C. If the recovery rate is badly affected,this is an indication
that scaling may have occurred. In this event,follow the procedures as recommended
by a reputable Water Treatment Company.
GENERAL
All work must be carried out by a suitably qualified/competent person.
No/Reduced flow of hot water at the taps
Check that the mains water supply is turned ON. Check the line strainer in the
combination inlet valve is not blocked. Check that the combination valve has been
fitted so that water is flowing in the correct direction.
If the water at the tap is cold
Ensure that the boiler has been switched ON and is working correctly. Check that there
are no air locks in the primary system. ISOLATE THE UNIT AT THE MAINS ELECTRIC
SUPPLIES AND THEN CHECK THE FOLLOWING:-
i) The control thermostat
ii) The overheat thermostat, which can be re-set by unscrewing the black cover
and pushing the red button.
iii) The motorised valve
iv) The boiler thermostat
v) The boiler overheat thermostat
vi) Programmer with the indirect appliance
If the boiler is for any reason unable to supply heat to the appliance heating and/or
hot water can be obtained by operating the 'Switch' controls on the front of the
appliance.
ANY ENERGY CUT-OUT MUST NEVER BE BY-PASSED UNDER ANY
CIRCUMSTANCES.
If the unit is still getting hot , ensure that the immersion heater is isolated from the
mains before re-setting the energy cut-out. If the immersion heater(s) need replacing
this should be done with the unit supplied from Gledhill Water Storage Ltd. Same day
despatch to approved installers can be arranged by telephoning 01253 474444.
Supplied By www.heating spares.co Tel. 0161 620 6677
DISCHARGE FROM RELIEF VALVES
If cold water is discharging from the expansion
relief valve drop the system pressure and check
the air pressure in the expansion vessel is 1.5
bar.
If the fault continues and the problem cannot
be stopped by operating the easing control a
few times then either the Pressure Reducing
Valve or the Relief Valve may be at fault. If
the cold water pressure is too high, this would
suggest that the Pressure Reducing Valve is at
fault and the Gledhill approved replacement
should be fitted. If the pressure is correct then
the Relief Valve/cartridge will require replacing
with a Gledhill approved component.
If there is an overheat fault and very hot water is
being discharged, turn off the heat source, but
not the water supply. When the system is cool,
check the control and overheat thermostats
and energy cut-outs in the immersion heater
and replace the faulty component with a unit
supplied by Gledhill and check that it works
correctly before returning the system to full
operation.
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