Hamworthy Sherborne Series, Инструкция по установке, пусконаладке и обслуживанию

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HAMWORTHY HEATING LTD
SHERBORNE 500001103/E
11.7 Installation Noise
In order to avoid the possibility of noise from the
installation, care should be taken to follow the
manufacturer’s instructions. Particular attention
should be paid to minimum water flow rates. If in
doubt contact the manufacturer.
11.8 User Instructions
When the above is complete, the boiler owner or their
representative should be made aware of the lighting
and operating instructions. A practical demonstration
should be given describing each functional step. This
Installer's Guide and user's instructions should then
be handed over and be kept in a safe place for easy
reference.
12.0 FAULT FINDING
12.1 Fault Finding
12.1.1 Safety Features Summary
Should the control thermostat fail, the temperature
limiter will trip thus creating an immediate shutdown
regardless of firing mode. An overheat neon on the
controls fascia will indicate this condition has
occurred. If, after pushing the overheat reset button,
the neon on the fascia does not extinguish and the
boiler does not fire up, it could be that the boiler is still
too hot, i.e. the limit thermostat has not re-set - see
Figure 11. Allow the boiler to cool down. An
investigation should be carried out to ascertain the
reason for the overheating. An obvious reason would
be too low a water flow rate through the boiler.
The flame is under constant supervision by the
burner sequence controller. This is accomplished by
measuring the flame's ability to rectify an AC current.
If the flame diminishes for whatever reason and the
rectified current drops below the controllers minimum
detection current (1.2 µA DC), the controller will
induce a lockout within 1 second, which will require a
manual re-set (situated on the controls fascia) to re-
start the control sequence - see Figure 11. Failure to
establish and detect a flame during the light up
sequence, results in burner shutdown and lockout
within 5 seconds. If the boiler continues to lockout,
then an investigation must be made to ascertain the
cause. See Figures 12.1 to 12.4 for possible
corrective scenarios. False flame signals at the start
and during purge will cause the boiler to lockout.
Restoration of the power supply after an interruption,
results in a full light up sequence to safely restart the
burner. Power failure after a lockout, will not interfere
with this condition when the supply has been
restored.
12.1.2 Fault Finding Procedures
General fault finding is shown in Figures 12.1 to 12.4.
If the boiler still cannot be operated satisfactorily after
following the chart, consult the local office of
Hamworthy Heating for assistance.
12.1.3 Possible Causes Of Boiler Lockout
1) Ignition failure due to no power at the Hot Surface
Igniter.
2) Ignition failure due to faulty gas valve.
3) Ignition failure due to broken igniter or flame probe
lead.
4) No ignition due to faulty controller.
5) Ignition failure due to blockage in the flue or air
ducts.
6) Ignition failure due to gas supply problem.
13.0 SERVICING
A competent person registered for working on non
domestic gas appliances should check and ensure
that the flue, its support and terminal, the ventilation
to the boiler house, safety valve, drain, water filter if
fitted, pressure gauge, etc.; are in a serviceable and
working condition and still comply with the relevant
standards and codes of practice - see
Section 3.
13.1 Regular annual servicing is recommended
,
preferably by a Hamworthy appointed person, to
ensure trouble free operation. Although cleaning of
flueways may not be necessary on a yearly basis, it is
important that all controls and safety features are
checked for correct operation.
NOTE! Measuring flue gas CO
2
and gas
temperatures will give an indication of the state of the
boiler flueways and waterways. Results should be
compared with previously measured values to
establish possible loss of efficiency.
13.2 Annual Service
The procedure detailed relates to a single boiler and
MUST be carried out on ALL individual modules
which constitute an installation. Before servicing the
boiler, the following procedure must be carried out :-
WARNING: Isolate all electrical supplies and turn
off the gas service valve.
1) Remove the screw on the top of the outer cover
and pull the cover away from the wall. The cover is
located on the wall frame by four ball studs.
2) Disconnect the flame probe lead at the probe, and
the igniter lead at the plug and socket. Unplug the
connectors from the fan (two) and the gas valve.
Disconnect the 15mm gas connection to the gas
valve inlet.
3) Remove the front screw and loosen the rear screw
securing the fascia panel to the controls panel body.
Carefully withdraw the fascia panel and secure on the
two hooks on the control panel body. Unplug the
condense level switch from the PCB and feed the
connector through the grommet in the rear of the
controls panel ( S70C only). Refit the fascia panel.
4) Remove the 2 – M10 nuts and washers securing
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