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A.O. Smith Manuals
Water Heater
BTH 300
Instruction manual
Table Of Contents - A.O. Smith BTH 300 Instruction Manual
Commercial gas water heaters
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Also See for BTH 300
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Quick installation tips
(1 page)
,
Service handbook
(56 pages)
,
Service handbook
(50 pages)
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Table Of Contents
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Contents
Table of Contents
Troubleshooting
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Table of Contents
Table Of Contents
2
Safe Installation, Use And Service
3
Approvals
3
General Safety Information
4
Introduction
6
Abbreviations
6
Icomm
6
Preparing For The Installation
6
Features And Components
7
Basic Operation
7
Modulation
7
Blower/Burner Assembly Detail
7
Top View
8
Components
8
Side Views
9
Installation Considerations
10
Rough In Dimensions
10
Locating The Water Heater
11
Extended Vent Terminations
11
Clearance To Combustile Materials
11
Service Clearance
11
Optional Direct Vent Terminations
12
Hard Water
12
Insulation Blankets
12
Installation Requirements
13
Gas Supply Systems
13
Supply Gas Regulator
13
Power Supply
13
Mixing Valves
14
Dishwashing Machines
14
Closed Water Systems
14
Thermal Expansion
14
Temperature-Pressure Relief Valve
15
T&P Valve Discharge Pipe Requirements
15
Condensate Drain
16
Combustible Material Storage
16
Contaminated Air
16
Condensate Drain Water Trap
16
Air Requirements
17
Unconfined Space
17
Confined Space
17
Unusually Tight Construction
17
Fresh Air Openings For Confined Spaces
18
Outdoor Air Through Two Openings
18
Outdoor Air Through One Opening
18
Outdoor Air Through Two Horizontal Ducts
18
Outdoor Air Through Two Vertical Ducts
19
Air From Other Indoor Spaces
19
Installation Of Carbon Monoxide Detectors
20
Signage
20
Exemptions
20
Manufacturer Requirements
20
General Venting Installation
21
General Venting Instructions
21
Approved Materials
21
Power Vent Configuration
21
Venting Requirements
22
Common Venting
22
Venting Installation Sequence
23
Power Vent Installation
23
Direct Vent Installation
23
Vent Connection
23
Direct Vent Air Intake Moisture Protection
24
Vertical Termination Installation
24
Intake Air Condensate Tee Installation
24
Intake Air Connection Detail
24
Vertical Termination Installation Intake Air And/Or Vent
25
Vertical Termination Flat Roof Clearance Intake Air And/Or Vent
25
Vertical Termination - Direct Vent
25
Sidewall Termination Installation
26
Direct Vent Standard Terminations
26
Sidewall Termination Installation Intake Air And/Or Vent
26
Polypropylene Installations
27
M & G Duravent Polypro Vent System Part Numbers
27
Centrotherm Innoflue Sw Vent System Part Numbers
27
Heatfab Saf–T Vent Al29-4C Vent System Parts
28
Duravent Fasnseal Al29-4C Vent System Parts
28
Concentric Termination Installation
29
6 Inch Concentric Termination Flat Roof Clearance
29
6 Inch Concentric Termination Installation
30
6 Inch Concentric Termination Kit Fiueld Assembly Required
30
6 Inch Concentric Termination Vertical Installation
30
6 Inch Concentric Termination Sidewall Installation
30
Multiple Concentric Termination Clearances
31
Three Concentric Terminations
31
Four Concentric Terminations
31
Groups Of Terminations
31
Multiple Concentric Termination Arrangements
32
Two Concentric Terminations
32
Eight Concentric Terminations
32
Low Profile Vent Installation
33
Low Profile Termination Kits - Dimensions
33
Each Kit Contains
33
Venting Arrangements
34
Power Vent Vertical
34
Power Vent Horizontal
34
Direct Vent Vertical
34
Direct Vent Vertical Concentric
35
Direct Vent Horizontal Concentric
35
Direct Vent Horizontal Low Profile
35
Termination Clearances Sidewall Power Vent
36
Termination Clearances Sidewall Direct Vent
37
Water Heater Installation
38
Condensate Drain Installation
38
Supply Gas Line Installation
39
Gas Line Sizing
39
Supply Gas Line Sizing Us Units
39
Supply Gas Line Sizing Metric Units
39
Gas Line Leak Testing
40
Purging
40
Electrical Wiring
40
Gas Line Connection
40
Enable/Disable Circuit
41
Water Line Connections
41
Connecting An External Supervisory Control
41
Water Piping Diagrams
41
T And P Valve Discharge Pipe
42
Thermometers
42
Water Heating And Space Heating
42
Temperature Regulation
43
High Temperature Limit Control
43
Thermostat Control
43
High Temperature Applications
43
Control System Operation
44
Overview
44
Control System Navigation
44
The Desktop Screen
44
Status Icons
45
Operating States
46
Control System Menus
46
User Settings And Control System Menus
47
Temperatures Menu
47
Heater Status Menu
48
Display Settings
49
Heater Information
49
Current Fault
50
Fault History
50
Fault Occurence
50
Restore Factory Defaults
50
Service Contact Information
51
Prior To Start Up
52
Filling The Water Heater
52
Initial Start Up
52
Required Test Equipment
52
Lighting And Operation Label
53
For Your Safety Read Before Lighting
53
Operating Instructions
53
To Turn Off Gas To Appliance
53
Checking The Firing Rate
54
Supply Gas Pressure Adjustment
54
Multiple Appliance Installations
54
To Turn Off Gas Supply
54
High Altitude Installations
55
Troubleshooting
56
Installation Checklist
56
Sequence Of Operation
56
Sequence Of Operation Flow Chart
57
Operational Problems
58
Fault And Alert Conditions
59
Fault And Alert Messages
60
General
62
Maintenance Schedule
62
Draining And Flushing
62
Precautions
62
Sediment Removal
63
Manual Lime Scale Removal
63
Chemical Lime Scale Removal
63
To Flush The Tank
63
Powerred Anode Rods
64
Drain Valve And Access Panels
64
Temperature-Pressure Relief Valve Test
64
Vent System
64
Figure
64
Diagrams
65
Central Control Board Layout
65
Wiring Diagram
66
Circulation Pump Wiring Diagram
67
Storage Tank Or Building Recirculation
67
Dishwasher Loop With Toggle Switch
67
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This manual is also suitable for:
Bth 400
Bth 500
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