3 Commissioning Procedure
Mk8 MM Manual Page | 72
3.4 Commissioning Fuel and Air Positions
The following procedure is shown for commissioning the EGA with option 12 set to 0 (Not Optioned), or 1
(Monitoring only). Trim can be added later by setting option 12 to 2 (Applies trim) or 3 (Applies trim,
combustion limits tested). Please see section 3.7 for adding/adjusting the trim data later during Single Point
Change. If the EGA is optioned later in Online Changes, the MM will not require a full re-commission; the trim
data can be added in Single Point Change.
For option 12 set to 0 or 1 during commissioning, omit section 3.4.6. For option 12 set to 2 or 3 during
commissioning, please include section 3.4.6.
The fuel and air positions need to be programmed for the following points: CLOSED, OPEN, GOLDEN
START (if optioned), FGR START (if optioned), LOW FIRE (START), INTER POINTS, and HIGH FIRE.
There must be a minimum of 3 INTER points entered on the fuel-air curve, and a maximum of 18. Points can
be added/removed in Single Point Change mode (see section 3.7).
During commissioning the required setpoint is not active; the internal stat remains on at all times regardless
of the actual value. Ensure that the high limit stat is set correctly and wired into the recycling interlock (T53),
as this will turn the burner off in the event that the safe working maximum temperature or pressure of the
boiler is exceeded.
The high limit stat should be set below the rating of the safety valve, please see the manufacturer’s
guidelines for the safety valve for that boiler.
Note: If a fault occurs, the boiler goes above the high limit stat or power is lost to the MM during
commissioning, no data is stored. The points entered are only stored within the MM once the commission
has been completed.
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