A.O. Smith BTH 120 Manuals

Manuals and User Guides for A.O. Smith BTH 120. We have 2 A.O. Smith BTH 120 manuals available for free PDF download: Service And Parts Manual, Service Handbook

A.O. Smith BTH 120 Service Handbook (56 pages)

COMMERCIAL GAS HIGH EFFICIENCY WATER HEATERS BTH 120 THRU 500 SERIES 200/201

Brand: A.O. Smith | Category: Water Heater | Size: 6.51 MB

Table of Contents
2
Introduction
3
- Qualifications
  3
- Service Warning
  3
- Service Reminder
  3
- Tools Recommended
  3
Installation Considerations
4
- Instruction Manual
  4
- Closed Water Systems
  4
- Thermal Expansion
  4
- Air Requirements
  4
- Contaminated Air
  4
Features and Components
5
Sequence of Operation Flow Chart
7
1 Low Gas Pressure

8
- Fault and Warning Codes
  8
- Gas Pressure Specifications
  8
- High Altitude
  8
- Gas Supply Systems
  9
- Supply Gas Regulator
  9
- Gas Pressure Test
  10
2 Blower Operation Error

12
- Pressure Switches
  12
- Control System Monitoring
  12
- Pressure Switch Tests
  13
- Continuity Test During Standby
  13
- Continuity Test During Operation
  14
- Pressure Test During Operation
  14
- Pressure Switch Settings
  15
3 Blower Prover Open

17
4 Ignition Failure

18
5 Blocked Air Intake

21
6 Blocked Exhaust

22
7 Flame Sensor Error

23
- Gas Control Valve
  23
- Gas Control Valve Voltage Tests
  24
- Flame Sensor
  25
- Flame Sensing Operation
  25
- Flame Sensing Current Test
  26
8 No Water

27
- Powered Anodes
  27
- Power Anode Cleaning and Removal
  27
9 Anode Shorted

29
10 Temperature Probe Short (Upper or Lower)

30
- Temperature Probe
  30
- Temperature Sensor Test
  31
- ECO Continuity Test
  31
11 Temperature Probe Open (Upper or Lower)

33
- Venting
  34
  - General Venting Information
    34
- Intake Air Connection
  35
- Electrical Connections - All Models
  36
  - Electrical Wiring
    36
  - Power Supply Connections
    36
  - Enable/ Disable Switch
    37
  - Power Supply Test
    37
- Installation Check List
  38
- Operation and Service
  39
  - How It Works
    39
  - Combustion Blower
    39
  - Modulation
    39
- Blower Speed Control - Bth 300 Thru 500
  41
- Variable Frequency Drive - Bth 300 Thru 500
  42
- Burner Assembly
  43
- Combustion Blower and Burner Removal/ Installation Instructions
  44
- Spark Igniter
  45
- Gas Orifice - Bth 300 Thru 500 Models
  47
  - Orifice Chart - BTH 300 Thru 500 Models
    47
- Ccb (Central Control Board)
  48
- Wiring Diagram - Bth 120 Thru 250
  53
- Wiring Diagram - Bth 300 Thru 500
  54
- Control Overview
  55

A.O. Smith BTH 120 Service And Parts Manual (65 pages)

For Series 960 through 967

Brand: A.O. Smith | Category: Water Heater | Size: 1.96 MB

Table of Contents
2
Introduction

3
- Clearances
  4
Installation

5
- Clearances
  5
- Direct Vent Installation
  6
- Air Requirements
  10
- Flammable
  11
- Condensation
  12
- Venting
  13
Information

16
- Controls
  16
- Controls
  18
- Pre-Service
  19
Troubleshooting

20
- Control Board Check
  21
- Transformer
  22
- Transformer
  23
- Temperature
  25
Troubleshooting - Continued

26
- Blower
  26
  - Blower
    27
- Gas Pressure Test
  31
Tables

32
- Component Part
  32
- Pressure Switches
  33
  - Wiring Connections
    34
  - Questions and Answers
    36
  - Bth Error Codes
    37
Error Codes

38
Service Checklist

38
- Series
  39
- Series
  50
- Series
  51
Parts Lists

54
- Series
  54
- Series
  55
- Series
  62

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A.O. Smith BTH 120 Manuals

A.O. Smith BTH 120 Service Handbook (56 pages)

Table of Contents

1 Low Gas Pressure

2 Blower Operation Error

3 Blower Prover Open

4 Ignition Failure

5 Blocked Air Intake

6 Blocked Exhaust

7 Flame Sensor Error

8 No Water

9 Anode Shorted

10 Temperature Probe Short (Upper or Lower)

11 Temperature Probe Open (Upper or Lower)

A.O. Smith BTH 120 Service And Parts Manual (65 pages)

Table of Contents

Introduction

Installation

Information

Troubleshooting

Troubleshooting - Continued

Tables

Error Codes

Service Checklist

Parts Lists

Related Products

A.O. Smith Categories