Commissioning Of Heat Engine - andrews MAXXflo EVO CWH 90/302 Installation And Maintenance Manual

5.2 COMMISSIONING THE HEAT ENGINES
5.2.1 IMPORTANT NOTES
CAuTION
The gas mixture and burner off-set gas rate (minimum load rate) is preset by the manufacturer.
Please DO NOT attempt to change the settings of the off-set governor behind the sealed cover.
Off-set governor cover
DO NOT REMOVE
DO NOT ADJUST
CAuTION
Before starting commissioning of the heat engines, it is important to check that the internal flue
pipes have not moved out of place during transportation. Pay special attention to the connection
into the top of each heat exchanger. Ensure that the flue pipe is straight and fully inserted into the
heat exchanger (see illustration below).
The heat engines on this heater have been tested and set by the manufacturer, but this will need
to be checked again when the heater has been fully installed into its operating environment. The
commissioning process involves the operation of the individual heat engine(s) at the maximum
possible heat load.
5.2.2 TOP HEAT ENGINE COMMISSIONING
Ensure that all the numbered points included in section 5.1 "Commissioning General" have been completed
successfully before proceeding with the following:
NOTE: A flue sample point is provided in the flue section immediately above the heat
exchanger. To use this sample point, carefully remove the rubber bung
Remove rubber bung
to access sample point
• Turn on power supply.
• Access the flue sample test point (see above)
• Insert a calibrated combustion analyser (approximately 65mm) inside the flue sample test point
• Turn on gas supply
• Ensure that the heater is set to "Standby" or "O" on the front
• The heater GUI display to used to operate the top heat engine unit, when commissioning (see next page for
details)
Commissioning
Check flue part is fully inserted
into heat exchanger
switch.
40 MAXXflo EVO