2 Options & Parameters
Mk8 MM Manual Page | 38
Opt. # Default Range Description
Channel 1 is always enabled for fuel; this option sets the channels in use.
Note: If option 8 is changed after commissioning, then the MM will need to
be re-commissioned, unless this option is returned to its previous setting.
MM: Internal Stat Operation
The internal stat turns the burner on and off according to the actual value
relative to the required setpoint. For setting 0, the
closed all the time, and a working stat must be fitted to the boiler. For
setting 1, the internal stat is opened at an offset above the required
setpoint, and closed at an offset below the required setpoint. For setting 2,
the internal stat is opened at an offset above the required setpoint, and
closed an at offset above the required setpoint. The offset values are set
Internal stat always closed
Burner operates below setpoint
Burner operates above setpoint
E.g. Option 9 = 1, required setpoint = 100
O
C (212
O
F)
E.g. option 9 = 2, required setpoint = 100
O
C (212
O
F)
MM: Burner Switch-Off Offset
O
C,
O
F, PSI or 0.1 bar or 0.01 bar for low pressure sensor (depends on
load detector set in option 1 and metric/imperial units set in parameter 40)
Note: This option is only relevant if option 9 is set to 1 or 2.
MM: Burner Switch-On Offset
O
C,
O
F, PSI or 0.1 bar or 0.01 bar for low pressure sensor (depends on
load detector set in option 1 and metric/imperial units set in parameter 40)
Note: This option is only relevant if option 9 is set to 1 or 2.
For settings 2 or 3, the EGA will trim on the channel 2 air damper, once
trim data has been added. If option 12 is set to 0 or 1, then trim can be
added at a later date by changing this to 2 or 3 in online changes, going
through single point change, and added trim data for each fuel-air position.
Applies trim, combustion limits tested