A.O. Smith 120 through 250 Series Manuals

Manuals and User Guides for A.O. Smith 120 through 250 Series. We have 8 A.O. Smith 120 through 250 Series manuals available for free PDF download: Instruction Manual, Installation, User And Service Manual, Service Handbook, Installation Instructions Manual

A.O. Smith 120 through 250 Series Installation Instructions Manual

A.O. Smith 120 through 250 Series Installation Instructions Manual (60 pages)

RESIDENTIAL CONDENSING GAS WATER HEATERS

Brand: A.O. Smith | Category: Water Heater | Size: 7 MB

Table of Contents

Table of Contents
2
Completed Installation (Typical)
3
Important Safety Information
4
Do Not Operate if Damaged
4
Hydrogen Gas Flammable
4
Limiting the Risk of Scalding
4
Warning Messages
5
Risks During Installation and Maintenance
6
Risks During Operation
6
Water Contamination Risk
7
Fire Risk
7
Explosion Risk
7
Carbon Monoxide Risk
8
Introduction
10
Abbreviations Used
10
Qualifications
10
Qualified Installer or Service Agency
10
Important Definitions
10
Preparing for Installation
11
Massachusetts Installation Requirements
12
Manufacturer Requirements - Gas Equipment Venting System Not Provided
12
Features and Components
13
Model Characteristics
15
Controls and Switches
15
Control Module
15
Pressure Switches
15
Outlet Air Pressure Switch (OAPS)
15
Intake Air Pressure Switch (IAPS)
15
Hot Surface Igniter (HSI)
15
Flame Sensor
15
Getting Started
16
Before You Begin
16
Recommended Accessories
16
Rough-In Dimensions
17
Verify that Your Home Is Equipped and Up-To-Date for Proper Operation
18
Water Pressure
18
Water Pressure Increase Caused by Thermal Expansion
18
Water Pipe and Tank Leaks
18
Water Temperature Regulation
18
Verify that the Location Is Appropriate
19
Removing the Old Water Heater
20
Combustion Air and Ventilation
21
Corrosion and Water Quality
21
Install Shut-Off and Thermostatic Mixing Valves
21
Installing the Vent System
22
Planning the Vent System
22
Vent Kit
22
Vent Pipe Material
23
Vent Pipe Length and Sizing
23
Polypropylene Vent Systems
23
Vent Pipe Runs
24
Vent Pipe Installation
24
Vent Screens
24
Installing the Exhaust/Condensate Tee
24
Important Notes and Warnings
25
Power Direct Venting (PDV)
25
Direct Vent Air Intake Moisture Protection
25
Termination Clearances Sidewall Power Vent
26
Side Wall Vent Termination (Standard)
27
Roof Vent Termination (Standard)
27
Side Wall Vent for Cold Climates
27
Concentric Vent Termination
27
Multiple Concentric Vent Termination
28
Low Profile Vent Installation
29
Calculating Equivalent Feet (PDV)
30
Installing a New Tee Termination
31
Installing a New 90° Termination
31
Power Vent (PV)
31
Termination Clearances Other than Sidewall Direct Vent
32
Calculating Equivalent Feet (PV)
34
Vent Installation
34
Condensate (Exhaust)
34
Installing the Water Heater
35
Water Line Connections
35
Thermostatic Point-Of-Use Mixing Valves
35
Closed Water Systems
36
Thermal Expansion
36
Temperature-Pressure Relief Valve
37
T&P Valve Discharge Pipe
37
Space Heating Applications
38
Combo Heating
38
System Requirements
38
Combo Heating Installation
39
Electrical Installation
39
Grounding Instructions
39
Electrical Supply
39
Dedicated Power Wiring and Breakers
39
Power Fluctuations and Electrical Noise
39
Electrical Wiring
40
Making the Electrical Connections
40
Gas Supply System Installation
40
Gas Supply Regulator
40
Gas Line Installation
41
Gas Line Sizing
42
Gas Supply Line Leak Testing
43
Gas Supply Line Purging
43
Water Heater Gas Leak Testing
43
High Altitude Installations
43
Connecting the Water Supply
43
Installation Checklist
44
Water Heater Location
44
Gas Supply and Piping
44
Vent Pipe System
44
Vent Termination
44
Vertical
44
Water System Piping
44
Electrical Connections
44
Start up and Operations
45
Start up Conditions
45
Smoke/Odor
45
Prior to Start up
45
Filling the Water Heater
45
Initial Start up
45
Required Test Equipment
45
Preparation
45
Lighting the Water Heater
46
Temperature Regulation
47
Temperature Control
47
Hot Water Can Scald
47
High Temperature Applications
48
High Temperature Limit Control (ECO)
48
Control System Operation
49
Icons
49
Buttons
49
On/Off
49
Lock/Unlock
49
Temperature Setpoint
49
Normal Mode / Vacation Mode
49
Burner in Operation
49
Switching between Temperature Units
49
Fault Indication
49
Maintenance
50
Venting System Inspection
50
Draining and Flushing
50
Draining the Storage Tank
50
Flushing the Storage Tank
50
Sediment Removal
51
Lime Scale Removal
51
Chemical Lime Scale Removal
51
Burner Operation and Inspection
51
Combustion Chamber and Burner Cleaning
51
Housekeeping
52
Maintain Minimum Clearances
52
Anode Rod Maintenance
52
Temperature-Pressure Relief Valve Test
52
Service
53
Troubleshooting
54
Service Mode
54
Outlet Air Pressure Switch (OAPS)
54
Intake Air Pressure Switch (IAPS)
54
Basic Sequence of Operation
55
Call for Heat
55
Monitor Flame Current
55
Burner Ignition Sequence
55
Water Leak Detection
55
Clearing Error Codes
56
Error Priority
57
Checking for Leaks
57
Diagrams
58
Wiring Diagram
58
Service Parts List
59

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A.O. Smith 120 through 250 Series Installation, User And Service Manual

A.O. Smith 120 through 250 Series Installation, User And Service Manual (104 pages)

High Efficient Condensing Water Heater

Brand: A.O. Smith | Category: Water Heater | Size: 2 MB

Table of Contents

Table of Contents
7
1 Introduction

11
- About the Water Heater
  11
- What to Do if You Smell Gas
  11
- Regulations
  11
- Target Groups
  12
- Maintenance
  13
- Notation Conventions
  13
- Overview of this Document
  14
2 Working Principle of the Water Heater

15
3 Installation

19
- Introduction
  19
- Packaging
  19
- Ambient Conditions
  19
- Technical Specifications
  21
- Installation Diagram
  27
- Unvented Water Connections
  28
- Vented Water Connections
  29
- Gas Connection
  29
- Air Supply and Chimney Flue Discharge
  30
- Specifications
  33
- Electrical Connection
  35
- Isolating Transformer
  37
- Check the Supply Pressure, Gas Controller Pressure, CO 2 Value and Switching Pressure
  38
4 Conversion to a Different Gas Category

47
- Introduction
  47
5 Filling

49
- Filling Unvented Installations
  50
- Filling Vented Installations
  50
6 Draining

51
- Draining Unvented Installations
  52
- Draining Vented Installations
  52
7 The Control Panel

53
- Introduction
  53
- Control
  53
- Explanation of Icons
  53
- ON/OFF Switch on Controller
  53
- Navigation Buttons
  53
- PC Connection
  54
- 8 Status of the Water Heater
  
  55
  - Introduction
    55
  - Operating Modes
    55
  - Error Conditions
    56
  - Service Condition
    56
  - Anode Warning
    57
- 9 Starting the Water Heater
  
  59
  - Introduction
    59
  - Starting the Appliance
    59
  - The Appliance's Heating Cycle
    59
10 Shutting down

61
11 Main Menu

63
- Introduction
  63
- Notation Convention for Menu-Related Instructions
  63
- Switching to "ON Mode
  63
- Setting the Water Temperature
  63
- Week Program
  64
- Starting and Stopping the Week Program
  64
- Changing the Appliance's Standard Week Program
  64
- Adding Times to a Week Program
  66
- Deleting Times from a Week Program
  67
- Extra Period
  68
- Settings
  69
12 Service Program

71
- Introduction
  71
- Setting the Hysteresis
  71
- Displaying the Error History
  71
- Displaying the Water Heater History
  71
- Display the Selected Water Heater
  72
- Switching the Pump on or off
  72
- Setting the Service Interval
  72
- Service Mode
  72
- Setting Legionella Prevention
  73
13 Errors

75
14 Service Interval

87
- Introduction
  87
- Determining Service Interval
  87
15 Performing Maintenance

89
- Introduction
  89
- Preparation for Maintenance
  89
- Water-Side Maintenance
  90
- Gas-Side Maintenance
  91
- Finalizing Maintenance
  92
16 Warranty (Certificate)

93
- General Warranty
  93
- Tank Warranty
  93
- Conditions for Installation and Use
  93
- Exclusions
  94
- Scope of the Warranty
  94
- Claims
  94
- Obligations of A.o.smith
  94
17 Appendices

95
- Introduction
  95
- Menu Structure
  96
- Electrical Diagram
  98
- Declaration of Conformity
  100
- Week Program Card
  101

A.O. Smith 120 through 250 Series Instruction Manual

A.O. Smith 120 through 250 Series Instruction Manual (88 pages)

COMMERCIAL GAS WATER HEATERS

Brand: A.O. Smith | Category: Water Heater | Size: 17 MB

Table of Contents

Table of Contents
2
Approvals
3
General Safety Information
4
Do Not Use if Damaged
4
Limiting the Risk of Scalding
4
Grounding Instructions
4
Hydrogen Gas Flammable
4
Important Definitions
4
Hazard Messages
5
Introduction
8
Abbreviations Used
8
Qualifications
8
ICOMM and BMS/EMS COMPATIBILITY
8
Preparing for the Installation
8
Features and Components
10
Basic Operation
10
Modulation
10
Blower/Burner Assembly Detail
10
Components- Top View (All Models)
11
Side Views
12
Left Side
12
Right Side
12
Rough-In Dimensions
14
Installation Considerations
14
Top View
14
Locating the Water Heater
15
Optional Direct Vent Terminations
16
Hard Water
16
Circulation Pumps
16
Insulation Blankets
16
Installation Requirements
17
Gas Supply Systems
17
Supply Gas Regulator
17
Power Supply
17
Power Fluctuations and Electrical Noise
17
Thermostatic Mixing Valves
18
Dish-Washing Machines
18
Closed Water Systems
18
Thermal Expansion
18
Temperature-Pressure Relief Valve
19
Condensate Drain
20
Combustible Material Storage
20
Contaminated Air
20
Air Requirements
21
Fresh Air Openings for Confined Spaces
22
Outdoor Air through One Opening
22
Installation Requirements - Commonwealth of Massachusetts
24
Manufacturer Requirements - Gas Equipment Venting System Provided
24
Venting Installation
25
General Venting Information
25
Category IV Appliances
25
General Venting Instructions
25
Venting Requirements
27
Common Direct Venting
28
Venting Installation Sequence
28
Power Vent Installation
28
Direct Vent Installation
28
Vertical Termination Installation
30
Polypropylene Installations
32
AL29-4C ® Vent Installations
33
Common Direct Venting Requirements
34
Concentric Termination Installation Preparation
34
Concentric Termination Installation
34
Combustion Air
35
Low-Profile Vent Termination Installation
37
Venting Arrangements
39
Termination Clearances Sidewall Power Vent
41
Termination Clearances Sidewall Direct Vent
42
Water Heater Installation
43
Condensate Drain Installation
43
Supply Gas Line Installation
43
Gas Line Leak Testing
45
Electrical Wiring
45
T&P Valve Discharge Pipe
47
Start up
49
Prior to Start up
49
Initial Start up
49
Lighting the Water Heater
50
Checking the Firing Rate
51
High Altitude Installations
51
Temperature Regulation
53
Limiting the Risk of Scalding
53
High Temperature Limit Control (ECO)
53
Thermostat Control
53
Intelligent Demand Response
54
Firing Rate Modulation
54
High Temperature Applications
54
Control System Operation
55
Control System Navigation
55
Wi-Fi
55
Lockout Function
55
User Settings & Control System Menus
58
Blocked Exhaust
62
Restore Defaults
63
Maintenance
66
Draining and Flushing
66
Sediment Removal
67
Lime Scale Removal
67
Burner Flame Inspection
67
Powered Anodes Maintenance
68
Drain Valve and Access Panels
68
Temperature-Pressure Relief Valve Test
68
Vent System Maintenance
69
Troubleshooting
70
Installation Checklist
70
Sequence of Operation
70
Sequence of Operation Flow Chart
71
Operational Problems
72
Fault and Alert Conditions
73
Checking for Leaks
76
Diagrams
77
Central Control Board (CCB) Layout
77
Wiring Diagram
78
Circulation Pump Wiring Diagrams
79
Water Piping Diagrams
80
Storage Tank
83

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A.O. Smith 120 through 250 Series Instruction Manual

A.O. Smith 120 through 250 Series Instruction Manual (120 pages)

INDUSTRIAL ELECTRIC WATER HEATERS

Brand: A.O. Smith | Category: Water Heater | Size: 15 MB

Table of Contents

A.O. Smith 120 through 250 Series Instruction Manual

A.O. Smith 120 through 250 Series Instruction Manual (52 pages)

COMMERCIAL ELECTRIC WATER HEATERS

Brand: A.O. Smith | Category: Water Heater | Size: 1 MB

Table of Contents

A.O. Smith 120 through 250 Series Instruction Manual

A.O. Smith 120 through 250 Series Instruction Manual (40 pages)

RESIDENTIAL GAS WATER HEATERS

Brand: A.O. Smith | Category: Water Heater | Size: 4 MB

Table of Contents

Safe Installation, Use and Service
2
Approvals
2
General Safety Information
3
Table of Contents
5
Introduction
5
Qualified Installer or Service Agency
5
Preparing for the Installation
5
Installation Requirements for the Commonwealth of Massachusetts
6
Typical Installation
7
Mixing Valves
9
Locating the New Water Heater
10
Facts to Consider about Location
10
Insulation Blankets
11
Air Requirements
11
Unconfined Space
12
Confined Space
12
Fresh Air Openings for Confined Spaces
12
Outdoor Air through Two Openings
12
Outdoor Air through One Opening
12
Outdoor Air through Two Horizontal Ducts
13
Outdoor Air through Two Vertical Ducts
13
Air from Other Indoor Spaces
13
Installing the New Water Heater
14
Chemical Vapor Corrosion
14
Water Piping
14
Space Heating & Potable Water System
14
Closed Water Systems
14
Thermal Expansion
15
Temperature-Pressure Relief Valve
15
High Altitude Installation
16
Gas Piping
16
Sediment Traps
17
Filling the Water Heater
17
Vent Pipe Assembly
18
Venting
18
Vent Pipe Termination
19
Planning the Vent System
20
Polypropylene Installations
21
Condensate
21
Blower Assembly Installation
22
Installation of Vent System
22
Vent Terminal Installation, Sidewall
22
Installation of Vent System, Sidewall
24
Installation of Vertical Vent System
24
Vent Pipe Preparation
25
Lighting & Operating Label
27
Temperature Regulation
28
For Your Information
29
Start up Conditions
29
Operational Conditions
29
Periodic Maintenance
29
Venting System Inspection
29
Burner Operation and Inspection
30
Burner Cleaning
30
Housekeeping
30
Anode Rod Inspection
30
Temperature-Pressure Relief Valve Test
31
Draining and Flushing
31
Service
32
Leakage Checkpoints
32
Repair Parts List
33
Troubleshooting Guidelines
34
Notes
37

A.O. Smith 120 through 250 Series Service Handbook

A.O. Smith 120 through 250 Series Service Handbook (40 pages)

COMMERCIAL GAS WATER HEATERS

Brand: A.O. Smith | Category: Heater | Size: 4 MB

Table of Contents

Table of Contents
2
Introduction
3
- Qualifications
  3
- Service Warning
  3
- Service Reminder
  3
Requirements
4
- Instruction Manual
  4
- Tools Required
  4
- Tools Optional
  4
Installation Considerations
5
Operation and Service
12
- Sequence of Operation
  12
- Electrical Sequence
  13
- Wiring Diagram
  14
- Operating Sequence - Flow Chart
  15
- Gas Control Valve
  16
Gas Control Valve/Burner Area View
18
Blower Prover Switch - Settings
19
Thermostat and Ignition Control Board View
20
White Rodgers Integrated Control - Thermostat
21
White Rodgers Ignition Control Board
21
Pre-Service Checklist
22
Troubleshooting
23
Ignition Control Board: Error Codes
23
- Flash
  23
- Flashes
  23
- Flashes
  24
- Flashes
  25
- Continuous Flash
  25
- Continuous on
  25
Integrated Heater Control: Display Lights
26
Test 1: 120 VAC to Heater Check
27
Test 2: Polarity Check
28
Test 3: Continuity Check of High Limit (ECO)
29
Test 4: Upper Temperature Probe Continuity Check
30
Test 5: Calling for Heat - no Blower Operation
31
Test 6: Blower On, no Ignition
32
Test 7: Blower On, Blower Prover Switch Closed, no Igniter Operation
33
Test 8: Igniter Heats, no Main Burner
34
Test 9: Igniter Heats, no Main Burner
35
Test 10: Main Burner Ignition for Less than Five Seconds
36
Test 11: Water Heater Shutting off below Setting
37

A.O. Smith 120 through 250 Series Service Handbook

A.O. Smith 120 through 250 Series Service Handbook (74 pages)

Series 960 through 967, 970 and 973

Brand: A.O. Smith | Category: Water Heater | Size: 8 MB

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