Operating instructions

Contents
4.9 Initial Operation............................................................................................................... 431
5. Maintenance of the Heater
5.1 Annual Maintenance ....................................................................................................... 501
6. Basic Troubleshooting
6.1 General Information ........................................................................................................ 601
6.2 General Failure Symptoms ............................................................................................. 601
6.3 Operational Failure Symptoms ....................................................................................... 602
6.3.1 Operational Failure Symptoms (reading the flash code)...................................... 603
6.4 Reading a Fault Code with 1531 “Comfort” Timer Installed ........................................... 603
6.4.1 Storing a Fault Code in Memory .......................................................................... 603
6.4.2 Reading and Removing Fault Codes Stored in Memory
using PC Diagnostics Kit P.N. 49440A ............................................................... 604
List of Figures
101 Thermo 90 S ................................................................................................................... 101
301 Enclosure Box Dimensions............................................................................................. 302
302 Enclosure Cover Dimensions ......................................................................................... 302
303 Heater Dimensions ......................................................................................................... 303
304 Control Unit Dimensions ................................................................................................. 304
305 Fuel Pump Dimensions................................................................................................... 304
306 Muffler Dimensions ......................................................................................................... 304
401 Installation Locations ...................................................................................................... 401
402 Permissible Enclosure Box Mounting Positions.............................................................. 401
403 Enclosure Box Mounting (Back Wall Shown) ................................................................. 402
404 Perpendicular Mounting Brackets................................................................................... 402
405 Permissible Heater Installation (Compact and Basic Kits) ............................................. 403
406 Muffler Mounting Detail................................................................................................... 404
407 Exhaust Discharge Positioning ....................................................................................... 405
408 Parallel Plumbing Circuit................................................................................................. 406
409 Series Plumbing Circuit .................................................................................................. 407
410 Plumbing with Auxiliary Heat Exchanger ........................................................................ 407
411 Engine Block Preheating and/or Boost Heating.............................................................. 408
412 Typical Installation Parameters (Enclosure and Compact Kit) ....................................... 421
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Contents Thermo 90 S Installation / Operation Manual