© MHG Heating Ltd
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MHG Heating Ltd Unit 4 Epsom Downs Metro Centre, Waterfield, Tadworth, Surrey KT20 5LR
Telephone 08456 448802 Fax 08456 448803 Email
Web www.mhgheating.co.uk
010711
17.0 Commissioning The Appliance
17.1 Pre-Commissioning Checks
Prior to undertaking the commissioning of the unit please ensure that the system water has been
cleansed and treated with a suitable inhibitor as detailed in Filling the system and system water
quality.
Prior to applying power to the appliance its circulation pump should be bled and checked to ensure
free rotation of the armature. Also ensure that the ignition electrodes spark gap is set to 4mm.
17.2 Combustion System Commissioning.
The commissioning function enables the boiler to be started up in heating mode by pressing the
Buttons simultaneously .
There are two levels of operation accessed via the commissioning mode.
Operation at Maximum Output With No Adjustment.
Pressing the BUTTONS for more than 3 seconds but less than 6 seconds places the appliance in High
Fire mode.
To indicate that the module is operating under the control of the commissioning mode an arrow will
appear on the display adjacent to the
symbol. The display will also indicate 100%
This mode is maintained until the limit thermostat temperature is reached or the coommissioning
buttons are pressed from more than 1 second.
Operation at Maximum or Minimum Output For Flue Gas Analysis and Gas Valve Adjustment
Pressing the BUTTONS for more than 6 seconds. places the appliance in High Fire mode.
To indicate that the module is operating under the control of the commissioning mode an arrow will
appear adjacent to the
symbol.
The display will also indicate 100%.
