A.O. Smith BT- 80 User Manual

2
CONTENTSCONTENTS
SAFE INSTALLATION, USE AND SERVICE ...................... 3
APPROVALS
......................................................................... 3
GENERAL SAFETY INFORMATION
................................... 4
Precautions
........................................................................ 4
Limiting the Risk of Scalding
.............................................. 4
Grounding Instructions
....................................................... 4
Hydrogen Gas Flammable
................................................. 4
INTRODUCTION
.................................................................. 7
Abbreviations Used
............................................................ 7
Qualications
...................................................................... 7
Preparing For The Installation
............................................ 7
DIMENSIONS AND CAPACITY DATA
................................. 8
Rough In Dimensions
......................................................... 8
FEATURES AND COMPONENTS
..................................... 10
Controls And Switches
..................................................... 12
POWERED ANODE ROD
................................................ 12
INSTALLATION CONSIDERATIONS
................................ 13
Locating The Water Heater
.............................................. 13
Insulation Blankets
........................................................... 14
Combustion Air And Ventilation
........................................ 14
INSTALLATION REQUIREMENTS
................................... 17
Chemical Vapor Corrosion................................................ 17
Water Piping
..................................................................... 17
Power Supply
................................................................... 17
Dedicated Power Wiring and Breakers
............................ 17
Power Fluctuations and Electrical Noise
.......................... 17
Thermostatic Point-of-Use Mixing Valves
......................... 18
Gas Supply Systems
........................................................ 18
Gas Pressure Requirements
............................................ 18
Supply Gas Regulator
...................................................... 19
Space Heating And Potable Water System
...................... 19
Solar Installation
............................................................... 19
Closed Water Systems
..................................................... 20
Thermal Expansion
.......................................................... 20
Temperature-Pressure Relief Valve
.................................. 20
T&P Valve Discharge Pipe Requirements:
....................... 21
Condensate Piping
........................................................... 21
CONDENSATE PH LEVEL
.............................................. 22
High Altitude Installations
................................................. 22
Filling the Water Heater
.................................................... 22
VENTING INSTALLATION
................................................. 23
Vent Installation Considerations
....................................... 23
BACK-FLOW PREVENTER
............................................. 24
Polypropylene Installations
............................................... 24
Vent Pipe Termination
...................................................... 24
Planning The Vent System
............................................... 25
Installation Of Horizontal Through The Wall Vent System
25
VENT TERMINAL INSTALLATION, SIDEWALL
............... 25
Direct Vent Terminal Installation
....................................... 25
Direct Vent Air Intake Moisture Protection
........................ 26
Installation Sequence
....................................................... 26
Vertical Vent Terminal Installation
..................................... 26
Flat Roof Installation
......................................................... 26
Sidewall Termination direct vent Clearances
.................... 28
Sidewall Termination Clearances Other Than Direct Vent
29
Direct Vent Diagram
......................................................... 30
Concentric Vent Installation
.............................................. 31
Low Prole Termination Installation
.................................. 33
WATER HEATER INSTALLATION
..................................... 35
Condensate Drain Installation
.......................................... 35
Gas piping
........................................................................ 35
SEDIMENT TRAPS
.......................................................... 35
TEMPERATURE REGULATION
........................................ 38
High Temperature Limit Control (ECO)............................. 38
Thermostat Control
........................................................... 38
High Temperature Applications
......................................... 39
CONTROL SYSTEM OPERATION
.................................... 40
Limiting the Risk of Scalding
............................................ 40
Control System
................................................................. 40
Control System Navigation
............................................... 40
User Input Buttons
............................................................ 40
LOCK OUT FUNCTION.................................................... 40
The Desktop Screen
......................................................... 40
User Settings & Control System Menus
........................... 43
FOR YOUR INFORMATION
.............................................. 50
SMOKE/ODOR
................................................................. 50
THERMAL EXPANSION
................................................... 50
Operational Conditions
..................................................... 50
AIR IN HOT WATER FAUCETS
....................................... 50
START UP
........................................................................... 51
Prior to Start up
................................................................ 51
Lighting and Operation Labels
......................................... 51
PERIODIC MAINTENANCE............................................... 53
Venting System Inspection
............................................... 53
Anode Rod Inspection
...................................................... 53
Temperature-Pressure Relief Valve Test
.......................... 54
Draining and Flushing
...................................................... 55
Sediment Removal
........................................................... 55
Lime Scale Removal
........................................................ 55
Burner Flame Inspection
.................................................. 56
Service
............................................................................. 56
LEAKAGE CHECKPOINTS
............................................... 57
TROUBLESHOOTING
....................................................... 58
Installation Checklist
......................................................... 58
Water Heater Location
...................................................... 58
Venting
............................................................................. 58
Gas Supply And Piping
..................................................... 58
Condensate Drain
............................................................ 58
Electrical Connections
...................................................... 58
Sequence Of Operation
.................................................... 58
Operational Problems
....................................................... 60
Rough Starting, Rough Operation
.................................... 60
Momentary Ignition
........................................................... 60
Not Enough Or No Hot Water
........................................... 60
Water Is Too Hot
............................................................... 60
Noisy Operation
................................................................ 60
Replacement Parts
........................................................... 61
Fault And Alert Conditions
................................................ 61
Fault And Alert Messages
................................................. 62
DIAGRAMS
......................................................................... 64
Wiring Diagram
................................................................. 64
Central Control Board (CCB) Layout
................................ 65

A.O. Smith BT- 80 Specifications

General

Brand	A.O. Smith
Model	BT- 80
Category	Water Heater
Language	English