A.O. Smith BTR 500, Instruction Manual

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2
Outdoor Air Through Two Vertical Ducts ........................................ 17
Air From Other Indoor Spaces ....................................................... 17
Technical Data Venting .................................................................. 18
WATer heATer InSTALLATIOn ...................................................... 19
Water Line Connections ................................................................ 19
T&P Valve Discharge Pipe ............................................................. 19
Installation Diagrams - Top Inlet/Outlet Usage .............................. 20
Code restrictions .......................................................................... 20
heater Wiring ................................................................................. 21
Gas Piping ..................................................................................... 22
Purging .......................................................................................... 22
Gas Pressure regulator ................................................................ 22
OPerATIOn ....................................................................................... 23
General .......................................................................................... 23
Filling ............................................................................................. 23
SeQUenCe OF OPerATIOn ........................................................... 23
Lighting & Operation Label ............................................................ 24
Check Venting ............................................................................... 25
Check the Igniter Assembly ........................................................... 25
Igniter Assembly ............................................................................ 25
Main Burner ................................................................................... 25
Gas Valves ..................................................................................... 25
Checking the Input ......................................................................... 26
mAInTenAnCe ................................................................................. 26
Venting System .............................................................................. 26
remote Storage Tank Temperature Control .................................. 26
Temperature-Pressure relief Valve Test ....................................... 26
hot Water Odor .............................................................................. 27
Anode rod Inspection ................................................................... 27
Draining and Flushing .................................................................... 27
recommended Procedure for Periodic removal of Lime Deposits
from Tank Type Commercial Water heaters ..................................
28
Deliming Solvents .......................................................................... 28
Tank Cleanout Procedure .............................................................. 28
Deliming Using Flo-Jug method .................................................... 28
Ignition module System ................................................................. 30
System Diagnostics ....................................................................... 30
SerVICe ............................................................................................ 30
electrical Servicing ........................................................................ 30
FOr yOUr InFOrmATIOn ............................................................... 30
Start Up Conditions ....................................................................... 30
Operational Conditions .................................................................. 30
Sequence of Operation Flow Chart ............................................... 32
OPerATIOnAL CheCkLIST ............................................................. 33
WATer PIPInG DIAGrAmS .............................................................. 34
mAnIFOLD kITS ................................................................................ 49
LImITeD WArrAnTy ........................................................................ 50
nOTeS ............................................................................................... 51
taBle of contents
SAFe InSTALLATIOn, USe AnD SerVICe........................................ 3
APPrOVALS ........................................................................................ 3
GenerAL SAFeTy InFOrmATIOn .................................................... 4
Precautions ...................................................................................... 5
Grounding Instructions .................................................................... 5
hydrogen Gas Flammable ............................................................... 5
InTrODUCTIOn .................................................................................. 6
Abbreviations Used ......................................................................... 6
Qualifications ................................................................................... 6
FeATUreS AnD COmPOnenTS ....................................................... 7
The eliminator (self-cleaning system) ............................................. 7
high Limit Switch ............................................................................. 7
electronic Ignition Control ................................................................ 7
exhaust Inducer (blower assy.)........................................................ 7
Uncrating ......................................................................................... 7
InSTALLATIOn COnSIDerATIOnS ................................................... 8
rough In Dimensions ...................................................................... 8
recovery Capacities ........................................................................ 8
Gas and electrical Characteristics ................................................... 8
Locating the Water heater ............................................................... 9
Clearances ...................................................................................... 9
Installation On Combustible Flooring ............................................. 10
Insulation Blanket .......................................................................... 10
hard Water .................................................................................... 10
Circulation Pumps ......................................................................... 10
high Altitude Installations .............................................................. 11
Propane Installations ..................................................................... 11
natural Gas Installations ............................................................... 11
InSTALLATIOn reQUIremenTS .................................................... 12
Gas Pressure requirements ......................................................... 12
Supply Gas regulator ................................................................... 12
Power Supply ................................................................................ 12
Water Temperature Control and mixing Valves.............................. 12
Dishwashing machines .................................................................. 13
Closed Water Systems .................................................................. 13
Thermal expansion ........................................................................ 13
Temperature-Pressure relief Valve ............................................... 13
Contaminated Air ........................................................................... 14
Air requirements ........................................................................... 14
Unconfined Space ......................................................................... 15
Confined Space ............................................................................. 15
Vent Adapter .................................................................................. 15
VenTInG InSTALLATIOn ................................................................. 15
Venting ........................................................................................... 15
multiple heater manifold ................................................................ 16
Fresh Air Openings For Confined Spaces ..................................... 16
Outdoor Air Through Two Openings .............................................. 16
Outdoor Air Through One Opening ................................................ 16
Outdoor Air Through Two horizontal Ducts ................................... 16