11
8
Pre-commissioning
Ensure that the system has been adequately flushed.
Purge gas supply of air and test for soundness.
Carry out final electrical tests to ensure the correct polarity
and earthing continuity.
DHW
Open the main cold feed valve.
Open all hot taps to purge DHW system.
Check for water soundness.
Check flow rate at the bath tap is set correctly (see
technical data).
Central Heating
Open flow and return valves on the boiler 30 and 33 (fig
17)
Open the automatic air vent 6 (fig 17)
Fill system and vent radiators.
Set system pressure and remove filling loop.
Check for leaks.
Manually check pump is free to turn.
Switch on electrical supply.
Turn selector switch
19 (fig 18) to On position I Turn the
boiler thermostat to maximum.
Allow pump to run for several minutes.
Isolate electrical supply.
Drain boiler and check water filter for installation debris.
Replace filter and recharge system.
Lighting the Boiler
Connect gas pressure gauge to test point 11 (Fig. 18).
Turn on the gas supply and boiler gas tap 31 (Fig. 17).
Ensure electrical supply is on.
Ensure all external controls are calling for heat.
Turn selector switch
19 (fig. 18) to On position I
Turn the boiler thermostat to maximum 21 (fig 18).
The boiler will light.
Allow the boiler to heat system.
Check the inlet gas pressure (working pressure) while
boiler is operating in hot water mode.(Refer to technical
data).
Check the operation of the boiler controls and safety
devices.(see separate servicing leaflet for details)
Set the by pass (Refer to system guidance).
Re-flush the system to remove any dissolved oils and
fluxes.
Recharge system pressure and introduce any water
treatment as required.
Post Commissioning
Ensure system pressure has been set correctly.
Set boiler thermostat and controls.
Set programmer to householder’s requirements.
Set external controls.
Ensure the Logbook is fully completed with your contact
details and required readings and details of the
installation.
Handing Over to the Householder
Demonstrate the lighting and operation of the boiler.
Demonstrate how to maintain the system pressure.
Demonstrate the operation and setting of the built-in clock.
Explain the benefits of annual maintenance by a
competent person.
Explain how to register guarantee.
Ensure the Householder countersigns the Logbook to
confirm that these demonstrations have been carried out
and understood.
Fig. 17
31
Fig. 18
6
19
11
21
30
33
32
Commissioning and Testing
