5
INSTALLATION AND OPERATING INSTRUCTIONS
SFC COMBI BOILERS SFC-99, SFC-125
CONTENTS
1.0 INSTALLATION ..........................................1-1
1.1 GENERAL........................................................1-1
1.2 CODE REQUIREMENTS ............................................1-3
1.3 LOCATION .......................................................1-3
1.3.1 Mobile Home Installations ........................................1-4
1.4 EXHAUST VENTING AND AIR INTAKE .................................1-5
1.4.1 Applications ...................................................1-6
1.4.2 Exhaust Vent Material ...........................................1-6
1.4.3 Vent Travel ....................................................1-7
1.4.4 Venting Passage Through Ceiling and Floor ..........................1-9
1.4.5 Rooftop Vent Termination .........................................1-9
1.4.6 Sidewall Vent Termination .......................................1-11
1.4.7 “Direct Vent” Combustion Air Intake Piping .........................1-15
1.4.8 “Indoor Air” 1.4.8 “Indoor Air” Combustion Air Intake ..................1-16
1.4.9 Closet Installations .............................................1-16
1.5 CONDENSATE REMOVAL..........................................1-17
1.5.1 Condensate Trap ..............................................1-17
1.5.2 Installing the Condensate Trap....................................1-17
1.5.3 Cleaning the Condensate Trap . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-18
1.5.4 Further Installation Details . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-18
1.6 Water Piping - SPACE HEATING .....................................1-20
1.6.1 General Piping Considerations....................................1-20
1.6.2 Basic Heating Piping Arrangements................................1-24
1.7 Domestic Hot Water System.........................................1-29
1.7.1 Domestic Hot Water System .....................................1-30
1.7.2 Domestic Hot Water Piping ......................................1-30
1.8 Gas Piping ......................................................1-33
Removing the cover ................................................1-34
1.9 Electrical Connections .............................................1-34
1.9.1 120VAC Line Voltage Hook-up....................................1-34
1.9.2 Power Quality and Electrical Protection .............................1-36
1.9.3 Zone Valve and Zone Pump Connections ...........................1-36
1.9.4 Thermostat / Sensor Wiring ......................................1-37
2.0
UNIT SYSTEM OPERATION .....................................2-1
2.1 GENERAL........................................................2-1
2.2 CONTROL .......................................................2-2
2.3 INSTALLER INTERFACE ............................................2-2
2.3.1 Turning Appliance ON/OFF .......................................2-2
2.4 Tankless Domestic Hot Water Modes ...................................2-5
2.4.1 Tankless Domestic Hot Water - Standard and ECO Comfort Modes ........2-5
2.5 Adding Domestic Hot Water Storage ...................................2-6
2.5.1 Tankless Domestic Hot Water with a Storage Tank .....................2-6
2.5.2 Domestic Hot Water with an Indirect Tank Heater ......................2-6
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