LAARS Mighty Max HH (Sizes 320M - 400M) - Installation, Operation and Maintenance Instructions - Manual (Page 2)

Page 2
LAARS Heating Systems
SECTION 1.
General Information
1.1 Introduction .................................................... 3
1.2 Warranty ........................................................ 3
1.3 Technical Assistance ..................................... 3
SECTION 2.
Installation Instructions
2.1 General Information ....................................... 4
2.2 Boiler Placement ........................................... 4
2.3 Installation of Outdoor Boilers ....................... 4
2.4 Freeze Protection .......................................... 4
2.5 Installation of Indoor Boilers .......................... 5
2.5.1 Combustion Air Supply and Ventilation ......... 5
2.5.2 Removal of Existing Boiler............................. 5
2.7 Water System Requirements ........................ 7
2.7.1 Flow Requirements ....................................... 7
2.7.2 Variable Water Flow Systems ....................... 8
2.7.3 System Pressure Requirements .................... 8
2.7.4 Hot/Chilled Water Systems............................ 8
2.7.5 Combined Space Heating/Potable
Water Heating Systems ................................. 9
2.8 Piping of System to Boiler ............................. 9
2.9 Filling the System ........................................ 10
2.10 Venting and Combustion Air Information ..... 12
2.11 Top-to-Rear Vent Collar Conversion ........... 12
2.12 Venting ........................................................ 13
2.12.1 Vertical Venting - Category I........................ 13
2.12.2 Vertical Venting - Non Category I ................ 13
2.12.3 Horizontal Venting - Non Category 1 ........... 13
2.12.4 Side Wall Vent Terminal .............................. 14
2.13
Air for Combustion and Ventilation .............. 15
2.13.1 Air From Room ............................................ 15
2.13.2 Ducted Combustion Air ............................... 15
2.13.3 Conversion for Ducted
Combustion Air ............................................ 16
2.13.4 Combustion Air Piping ................................. 16
2.14
Electrical Wiring ........................................... 16
SECTION 3.
Operating Instructions
3.1 Start Up Requirements ................................ 18
3.2 Hi-Limit checkout ......................................... 19
3.3 Venturi and Gas Pressure
Regulator System ........................................ 19
3.3.1 Overall Operation ........................................ 19
3.4 To Start Up System ..................................... 19
3.4.1 Setting Temperature Controls ..................... 20
3.5 To Shut Down System ................................. 20
3.6 Venturi Adjustment - Natural Gas ................ 20
3.6.1 Pressure Measurement Ports -
Natural Gas ................................................. 20
3.6.2 Adjustment Procedure - Natural Gas ........... 20
3.6.3 Venturi Setup Procedure ............................. 21
3.7 Venturi Adjustment - Propane Gas .............. 22
SECTION 4.
Maintenance
4.1 General Instructions .................................... 23
4.2 Heat Exchanger ........................................... 24
4.2.1 Inspection of the Heat Exchanger ............... 24
4.2.1a External Heat Exchanger Inspection ........... 24
4.2.1b Internal Heat Exchanger Inspection ............ 24
4.2.2
Cleaning the Heat Exchanger ..................... 24
4.2.2a Cleaning the Heat Exchanger - External ..... 24
4.2.2b Cleaning the Heat Exchanger - Internal ...... 25
4.3
Gas and Electric Controls ............................ 25
4.4 Filter ............................................................ 25
4.4.1 Filter Function .............................................. 25
4.4.2 Filter Service ............................................... 25
SECTION 5.
Troubleshooting
5.1 Sequence of Operation ............................... 25
5.2 Venturi and Gas Pressure
Regulator System ........................................ 26
5.2.1 Field Checkout ............................................ 26
5.3 Electrical Components ................................ 26
5.3.1 General Troubleshooting ............................. 26
5.3.2 Electrical Troubleshooting ........................... 26
SECTION 6.
Parts List for Mighty Max HH Boiler
6.1 General Information ..................................... 28
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