While you wait for answers, we may have found some information which could help you.
Click here for S Matter BoilerWhat size spanner to free rad bleed valve?
Dimplex RMG25 causes circuit breaker to pop?
Efficiency of my oil heater?
Sorry the make is dimplex model FC2009Ti?
How can I mend my Hyundai oil filled radiator?
Glen Dimplex Oil Filled Heater OFC2000 2KW?