Laars NEOTHERM NTH Installation And Operation Instructions Manual

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Laars NEOTHERM NTH Installation And Operation Instructions Manual Manual pdf 2 page image

LAARS Heating SystemsPage 2TABLE OF CONTENTSSECTION 1.General Information1.1 Introduction ...................................................... 31.2 Model Identification ......................................... 31.3 Appliance Overview ......................................... 41.4 Warranty .......................................................... 41.5 Unpacking ....................................................... 41.6 Dimensions ...................................................... 41.7 Locating the Appliance .................................... 91.8 Locating Appliance for Correct Vent Distancefrom Outside Wall or Roof Termination ........... 9SECTION 2.Venting and Combustion Air2.1 Combustion Air ................................................ 92.1.1 Combustion Air From Room ............................ 92.1.2 Intake Combustion Air ................................... 102.2 Venting .......................................................... 102.3 Locating Vent & Combustion Air Terminals ... 132.3.1 Side Wall Vent Terminal ................................ 132.3.2 Side Wall Combustion Air Terminal ............... 132.3.3 Vertical Vent Terminal ................................... 132.3.4 Vertical Combustion Air Terminal .................. 132.3.5 Installations in the Commonwealthof Massachusetts .......................................... 142.4 Common Vent Test ....................................... 14SECTION 3.Gas Supply and Piping3.1 Gas Supply and Piping .................................. 15SECTION 4.Water Connections4.1 Heating System Piping:Hot Supply Connections ................................ 164.2 Cold Water Make-Up ..................................... 184.3 Freeze Protection .......................................... 194.4 Recognized Chemicals .................................. 23SECTION 5.Electrical Connections5.1 Main Power ................................................... 235.2 Control Features ............................................ 235.2.1 User Mode ..................................................... 245.2.1.1 Temperature Control Point Adjustment ......... 245.2.1.2 Direct Hot Water Control Point Adjustment ... 245.2.2 Setup Mode ................................................... 245.2.2.1 Adjusting the Temperature DisplayUnits in °F or °C ............................................. 245.2.2.2 Adjusting the Outdoor Reset On or Off .......... 245.2.2.3 Adjusting Low Boiler Temperature Setpoint .. 245.2.2.4 Adjusting High Outdoor TemperatureSetpoint ......................................................... 245.2.2.5 Adjusting Low Outdoor TemperatureSetpoint ......................................................... 255.2.2.6 Anti Short Cycle Time .................................... 255.2.3 Diagnostic Mode ............................................ 255.2.3.1 High Limit Setting .......................................... 255.2.3.2 DHW Limit Setting ......................................... 255.3 Pump Connections ........................................ 255.4 Temperature Control ..................................... 265.5 Temperature Control - Indirect Tank ............. 265.6 Outdoor Reset Operation .............................. 265.7 External Control Connections ........................ 265.8 Wiring Diagram .............................................. 27SECTION 6.Operating Instructions6.1 Filling the Boiler System ................................ 296.2 Operating the Burner and Set Up .................. 296.2.1 Burner Operation ........................................... 296.2.2 Boiler Setpoint and Adjustment ..................... 306.3 Shutting Down the NeoTherm ....................... 316.4 To Restart the NeoTherm .............................. 31SECTION 7.Maintenance7.1 System Maintenance ..................................... 317.2 Appliance Maintenance andComponent Description ................................. 327.2.1 Burner ............................................................ 337.2.2 Modulating Gas Valve / Venturi ..................... 337.2.3 Appliance Control .......................................... 337.2.4 Ignitor Assembly ............................................ 337.2.5 Flame Sensor ................................................ 337.2.6 Transformers ................................................. 337.2.7 Blower ........................................................... 337.2.8 Heat Exchanger Coils .................................... 347.2.9 Gas Pressure Switches (optional) ................... 34SECTION 8.Trouble Shooting8.1 Sequence of Operation ................................. 348.2 Short Cycling ................................................. 368.3 Error Codes ................................................... 36SECTION 9.Replacement Parts9.1 General Information ....................................... 369.2 Parts List ....................................................... 37