Glow-worm 18-30sxi Range - Manual (Page 29)

29 0020008155A
11 Commissioning
11.6 Testing - Heating System
Check that all remote controls are calling for heat. The boiler will
fire automatically. Fully open all radiator valves and flow control
valve ‘A’ if fitted, see diagram 4.1.
Balance the radiators as required and if fitted adjust valve ‘A’ to
give the required system differential. Turn off all radiators that
can be shut off by the user and check to see if less than the
maximum differential allowed of 20
o C can be achieved across
flow and return.
This boiler has a built in bypass, see diagram 11.4. and 14.17.
The boiler is supplied with the bypass open half a turn. It should
not be necessary to adjust the bypass, but if required turn the
adjustment screw clockwise to close the valve, see diagram
11.4.
Allow the system to reach maximum temperature then switch off
the boiler by isolating from the electrical supply.
Drain the entire system rapidly whilst hot, using the drain tap at
the lowest part of the system. Fill and vent the system as
described previously in section 11.2.
Lock or remove the handle from control valve ‘A’ to prevent
unauthorised adjustment.
11.7 Completion
Adjust the boiler temperature control and any system controls
to their required settings. In addition it is necessary to complete
the "Benchmark" logbook.
Diagram 11.4
AUTOMATIC
BYPASS
VALVE
BYPASS
TUBE
9531
11.8 User Controls and Options
The mains / reset switch is used to restart the boiler after a fault
condition has occurred, i.e. ignition failure.
The central heating water temperature control knob allows the
user to set the desired temperature.
NOTE: If there is no demand the digital display shows the water
pressure.
Temperature Display
The digital display normally shows the operating temperature
of the unit when there is a central heating demand.
11.9 Pump Exercise Program
After a power cut or every 24 hours in frost setting/summer
mode the pump will run for one minute to prevent it from sticking.
This will also occur during normal operating if there is no
demand for more than 24 hours.
11.10 Frost Protection
The boiler has a built in frost protection programme as long as
the electricity and gas are left switched on.
This device operates the burner and system pump when the
temperature inside the boiler falls to 3
0 C.
When the temperature inside the appliance reaches 10°C the
burner will shut down and after a short period the pump will stop.
This device primarily protects the boiler. Any other exposed
areas of the system should be protected by a separate frost
thermostat.
11.11 Instruct the User
Instruct and demonstrate the lighting procedure and advise the
user on the safe and efficient operation of the boiler.
Instruct on and demonstrate the operation of any heating
system controls.
Advise the user on the use and maintenance of any scale
reducer and pass on any relevant instructional documents.
Advise that to ensure the continued efficient and safe operation
of the boiler it is recommended that it is checked and serviced
at regular intervals. The frequency of servicing will depend
upon the installation conditions and usage, but in general, once
a year should be enough.
Draw attention, if applicable, to the current issue of the Gas
Safety (Installation and Use) Regulations, Section 35, which
imposes a duty of care on all persons who let out any property
containing a gas appliance in the UK.
The user shall not interfere with or adjust sealed components.
It is the Law that any servicing is carried out by a competent
person.
Advise the user that, like all condensing boilers this appliance
will produce a plume of condensation from the flue terminal in
cool weather. This is due to the high efficiency and hence low
flue gas temperature of the boiler.
Advise the user of the precautions necessary to prevent damage
to the system, boiler and the building, in the event of the heating
system being out of use during frost or freezing conditions.
Advise the user that the permanent mains electrical supply
SHOULD NOT be switched off, as the built in frost protection
and pump saver program would not be operable.
Reminder, leave these instructions and the ‘Benchmark’ logbook
with the user.
11 Commissioning - Instructions to the User
For IE, it is necessary to complete a "Declaration of Conformity"
to indicate compliance to I.S.813. An example of this is given in
the current edition of I.S.813.
Testing Flue Gases: If any doubt exists that the flue products
are not exhausting correctly, investigate by use of a gas
analyser (FGA).