Laars MFTHW199 - Control Board, Electrical Diagram

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LAARS Heating Systems

Page 50

4.19ControlBoard,ElectricalDiagram

Control Board

Table of Contents

Default Chapter2
- Table of Contents2
Section 13
Product Accessories3
- Introduction3
- Included with the Appliance3
Section 24
Product Characteristics4
- Model Nomenclature4
- Specifications5
- Dimensions8
- Names of Components10
- Product Flow and Characteristics13
Section 314
Safety Regulations14
- Safety Symbols14
- Safety Precautions and Proper Use16
Section 417
Installation17
- Location and Clearances17
- Wall Mount Bracket18
  - Installation Height and Location18
  - Hang the Boiler18
- Combustion Air19
  - Combustion Air from Room19
  - Ducted Combustion Air19
- Venting (Exhaust)21
- General Location Guidelines22
- Locations for Vent Pipe Terminator23
  - Direct Venting Clearances23
  - Non-Direct Venting Clearances24
  - Venting Requirements in Massachusetts25
    - Commonwealth of Massachusetts25
    - Common Vent Test26
- Air Supply and Vent Connections at the Appliance27
  - Vent / Air Pipe Lengths27
  - Direct Venting27
  - Indoor Combustion Air28
- Vent / Air Pipe Termination29
- Vertical Vent Termination30
- Gas Supply and Piping31
- Gas Supply Pressure36
- Gas Set up and Adjustment37
- High Altitude Installations and Orifices38
- Natural Gas to Propane Conversion39
- Plumbing Guidelines43
- Pressure Relief Valve48
- Disposal of Condensate49
- Electrical Wiring Connections50
- DIP Switches51
- Control Board, Electrical Diagram52
- Ladder Diagram53
- Electrical Connections54
Section 556
Control Display and Operation56
- Control Dial and Buttons56
- LCD Overview57
- Operating Mode58
- Setting the Clock59
- CH Set Point Change Mode60
- Status Display Mode61
- Installer Mode62
- Storage (Indirect Water Heater)65
- Outdoor Reset Adjustment66
- External Set Point Temperature Control66
- Error Mode67
Section 668
Error Codes68
- Fault Tree Analysis72
Section 773
Trouble Shooting73
- Diagnostics73
- Suggested Corrective Actions74
Maintenance76
Section 876
- Annual Startup and General Maintenance76
- Flushing the Boiler78
Section 979
Installation Check79
- Quick View79
- Final Check Lists80
Parts82
Section 1082
- Parts List and Illustrations82

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