- 3 -8. MAINTENANCE .......................................................................................................268.1 Emptying and Cleaning the in-line water trap ..................................................268.2 Changing the particle filter................................................................................269. PROBLEM SOLVING ...............................................................................................2710. ANNUAL RE-CALIBRATION .................................................................................2711. PRODUCT SPECIFICATION ............................................................................. 28-29APPENDICES:A. MAIN DISPLAY PARAMETERS ............................................................................30B. COMBUSTION EFFICIENCY CALCULATION............................................... 32-33C. CALCULATION OF FUEL DATA...........................................................................34D. ELECTROMAGNETIC COMPATABILITY STATEMENT ...................................35