1 Mk8 MM Overview, Specifications and Wiring
Mk8 MM Manual Page | 25
Switched neutral – drives channel 1 servomotor clockwise
Switched neutral – drives channel 1 servomotor counter clockwise
Switched neutral – drives channel 2 servomotor clockwise
Switched neutral – drives channel 2 servomotor counter clockwise
Switched neutral – drives channel 3 servomotor clockwise
Switched neutral – drives channel 3 servomotor counter clockwise
Switched neutral – drives channel 4 servomotor clockwise
Switched neutral – drives channel 4 servomotor counter clockwise
Switched neutral – 2-port valve for IBS operation
Switched neutral – alarm output for MM lockout/MM error/EGA error.
Start position interlock (selectable via option 154)
Purge position interlock/ delay purge time (selectable via option 155)
Fuel 2 valves C.P.I/POC (Dual Fuel Output Mode & Change on the Fly)
Fuel 2 Main Valve 2 (Dual Fuel Output Mode & Change on the Fly)
Fuel 2 Vent Valve (Dual Fuel Output Mode & Change on the Fly)
Mains voltage input. For use when using an external flame switch- 0V when at no flame state
Mains voltage input. For use when using an external flame switch- line voltage when at no
flame state
Mains voltage input. Select second required setpoint- second set-point facility
Mains voltage input. Lead boiler select (overrides DTI) / Local – remote PID select for external
modulation
Mains voltage input – selects fuel 1 curve
Mains voltage input – selects fuel 2 curve
Mains voltage input – selects fuel 3 curve (enables COF when energised with T92
simultaneously)
Mains voltage input – selects fuel 4 curve (enables COF when energised with T91
simultaneously)
Mains voltage input – warming start or night setback input (selectable via option 79)
Mains voltage input – selects hand operation (overrides mode set on MM screen)
Mains voltage input – selects low flame hold operation (overrides mode set on MM screen)
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