AUTOFLAME Mk8 MM User Manual

8 Multi Burner Operation
Mk8 MM Manual Page | 154
8.5.2 Multi-Burner with individual EGAs
If the Master and Slave MMs fire into individual combustion chambers, individual EGAs can be used for each
MM, by mounting the sampling probes in the individual flue or in the first pass, before the flues join to meet a
common stack.
The EGA sampling probe is mounted in the stacks, and the EGA communicates with each MM individually
through a direct data link on terminals 25 and 26, these cannot be wired in parallel or series. In addition to
the multi-burner options, the following EGA options need to be set on each MM:
• Option 12 – EGA Operation
• Option 33 – MM Identification (MM ID must match EGA ID)
All MMs need to be fully commissioned simultaneously, with the points in the combustion curve entered at
the same point and at similar angular degrees to ensure that all burners are firing with good emissions
throughout the firing range. Alternatively, the MMs can be commissioned independently with option 12 set to
1 (EGA monitoring only) and then set to 2 or 3 afterwards with trim values entered in single point change one
system at a time. Once all systems are commissioned, all MMs will modulate as normal and trim to their own
trim curve.
Combustion Safety Limits on the EGAs can also be used with multi-burner operation, allowing the user to set
absolute or offset limits of O
2
, CO, CO
2
, NO and exhaust temperature. Any combustion limits alarms will
operate as set in EGA option 13, the effect on other multi-burner systems is dependent on option 43 setting.
Please refer to the EGA Setup Guide for more information on setting up combustion limits.

AUTOFLAME Mk8 MM Specifications

General

Brand	AUTOFLAME
Model	Mk8 MM
Category	Controller
Language	English