Watts Aerco Modulex MLX EXT 1530 - Page 3

Modulex EXT Commercial Series Boilers User Manual
OMM-0095_0H AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, NY 10913 Page 3 of 144
GF-139 Phone: 800-526-0288 09/15/2017
Natural Gas Piping Sizes ....................................................................................................................... 32 4.9.1.1
Natural Gas Piping Connections .......................................................................................................... 32
4.9.1.2
Natural Gas Supply Pressure Requirements ........................................................................................ 32
4.9.1.3
4.9.2 Propane Gas Connections ....................................................................................................................... 32
Propane Gas Piping Sizes ..................................................................................................................... 32 4.9.2.1
Propane Gas Piping Connections ......................................................................................................... 32
4.9.2.2
Propane Gas Supply Pressure Requirements ....................................................................................... 32
4.9.2.3
4.10 FLOW AND RETURN PIPE CONNECTIONS ........................................................................................................ 33
4.11 PRESSURE RELIEF VALVE .................................................................................................................................. 33
4.12 CSD-1 MANIFOLD ASSEMBLY (SUPPLIED) ........................................................................................................ 34
4.13 DETERMINATION OF PRIMARY BOILER PUMP OR BOILER SYSTEM PUMP ...................................................... 35
4.14 CONDENSATE PIPING AND DRAIN ................................................................................................................... 36
4.15 WATER TREATMENT ........................................................................................................................................ 38
4.16 IMPORTANT INSTALLATION WARNINGS.......................................................................................................... 38
4.16.1 Oxygen Levels in the System Water Warning ....................................................................................... 38
4.16.2 Antifreeze Compatibility Warning ........................................................................................................ 38
4.16.3 Lime Scale and Corrosive Water Damage Warning .............................................................................. 39
4.16.4 Connection to Refrigeration System Warning ...................................................................................... 39
4.17 OPTIONAL AIR INTAKE CONNECTION .............................................................................................................. 39
4.18 FLUE MANIFOLD INSTALLATION ...................................................................................................................... 39
4.19 FLUE EXHAUST PIPING TO VENT ...................................................................................................................... 41
4.20 VENT STARTER PIECES ..................................................................................................................................... 42
4.21 COMBUSTION AIR AND VENTILATION OPENINGS ........................................................................................... 43
4.21.1 Insufficient Ventilation and Combustion Air......................................................................................... 43
4.21.2 Room Air Combustion ........................................................................................................................... 44
4.21.3 Sealed Combustion ............................................................................................................................... 44
4.22 INSTALLATION OF THE EXHAUST AND AIR INTAKE SYSTEM ............................................................................ 45
4.22.1 Important Factors for Terminal Orientation and Location ................................................................... 45
4.22.2 Minimum and Maximum Wall Thickness.............................................................................................. 46
4.23 VENT PIPE SIZING ............................................................................................................................................. 46
4.24 ELECTRICAL CONNECTIONS ............................................................................................................................. 48
4.24.1 Regulations in Force ............................................................................................................................. 48
4.24.2 Mains Electrical Supply Connection (120 V – 60 Hz) ............................................................................ 48
4.24.3 Service Relay Requirement ................................................................................................................... 49
4.24.4 Electrical Requirements ........................................................................................................................ 49
4.25 FUNCTIONAL WIRING DIAGRAM ..................................................................................................................... 53
4.26 LADDER DIAGRAMS ......................................................................................................................................... 55
4.27 GENERAL LADDER DIAGRAM ........................................................................................................................... 56
4.28 E8 CONTROLLER AND BCM TERMINAL ASSIGNMENTS .................................................................................... 56
4.29 INSTALLATION EXAMPLES ................................................................................................................................ 59
4.30 STARTING UP: FILLING AND DE-AERATING THE BOILER .................................................................................. 61
4.30.1 Necessary Precautions for Safety ......................................................................................................... 61
4.30.2 Supply Voltage, Gas Pressure, and Water pressure.............................................................................. 61
4.31 FILLING THE SYSTEM ........................................................................................................................................ 61
4.31.1 Necessary Precautions While Filling the System .................................................................................. 61
4.31.2 Filling Locations and Preparation.......................................................................................................... 62
4.32 TESTING THE IGNITION SAFETY SHUT-OFF DEVICE .......................................................................................... 64
4.33 BURNER CALIBRATION ..................................................................................................................................... 65
4.33.1 Installing the Gas Analyzer Probe ......................................................................................................... 65
4.33.2 Maximum Output Calibration ............................................................................................................... 66
4.33.3 Minimum Output Calibration ............................................................................................................... 67
4.33.4 Final Check and Ignition Failure Adjustment Procedure....................................................................... 67
4.34 SWEEPER MODE (MANUAL CONTROL) ............................................................................................................ 70
4.35 HIGH ALTITUDE ADJUSTMENT ......................................................................................................................... 71
4.36 HIGH ALTITUDE CONVERSION LABEL ............................................................................................................... 72
4.37 CONVERSION FROM NATURAL GAS TO PROPANE GAS ................................................................................... 73