A.O. Smith BTH-120 - Venting Arrangements (Continued); Direct Vent Vertical Vent Horizontal Intake; Direct Vent Horizontal Vent Vertical Intake; Direct Vent Vertical Concentric

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VENTING ARRANGEMENTS

Direct Vent Vertical Vent Horizontal Intake

Figure 44

Direct Vent Vertical Concentric

Figure 46

Direct Vent Horizontal Vent Vertical Intake

Figure 45

Direct Vent Horizontal Concentric

Figure 47

Main Page

Instruction Manual1
Table of Contents2
Approvals3
SAFE INSTALLATION, USE and Service3
General Safety Information4
Grounding Instructions4
Hydrogen Gas Flammable4
Precautions4
Abbreviations Used6
Icomm™ & Bacnet Compatible6
Introduction6
Preparing for the Installation6
Qualifications6
Basic Operation7
- Top Views8
- Side Views10
- INSTALLATION Considerations11
- Rough in Dimensions11
- Locating the Water Heater12
- Extended Vent Terminations13
- Optional Concentric Terminations13
- Hard Water13
- Circulation Pumps13
- Insulation Blankets13
- Installation Requirements14
Blower/Burner Assembly Detail7
Features and Components7
Gas Supply Systems14
- Supply Gas Regulator14
- Power Supply14
- Mixing Valves15
- Dishwashing Machines15
- Closed Water Systems15
- Thermal Expansion15
- Temperature-Pressure Relief Valve16
- Condensate Drain17
- Combustible Material Storage17
Contaminated Air17
Air Requirements18
Confined Space18
- Fresh Air Openings for Confined Spaces19
- Outdoor Air through Two Openings19
- Outdoor Air through One Opening19
- Outdoor Air through Two Horizontal Ducts19
Unconfined Space18
Air from Other Indoor Spaces20
- INSTALLATION Requirements - Commonwealth of Massachusetts21
- Venting Installation22
- General Venting Information22
- General Venting Instructions22
- BTH 199 & 250 Intake Air Connection23
- Venting Requirements24
- Venting Installation Sequence25
- Power Vent Installation25
Outdoor Air through Two Vertical Ducts20
Direct Vent Installation25
- Intake Air Connection26
- Intake Air Screen26
- Vertical Termination Installation27
- Sidewall Termination Installation29
- Concentric Termination Installation30
- Inch Concentric Termination Installation31
  - Multiple Concentric Termination Clearances32
  - Multiple Concentric Termination Arrangements33
Venting Arrangements34
- Termination Clearances Sidewall Power Vent36
- Termination Clearances Sidewall Direct Vent37
Water Heater Installation38
- Condensate Drain Installation38
- Supply Gas Line Installation39
- Gas Line Leak Testing40
- Purging40
- Electrical Wiring41
- Water Line Connections42
- T&P Valve Discharge Pipe42
- Temperature Regulation43
- High Temperature Limit Control (ECO)43
- Thermostat Control43
- Control System Operation44
- Overview44
- Control System Navigation44
  - Status Icons45
  - Operating States46
  - Control System Menus46
- User Settings & Control System Menus47
  - Temperatures Menu47
  - Heater Status Menu48
  - Display Settings49
  - Heater Information49
  - Current Fault50
  - Fault History50
  - Fault Occurrence50
  - Service Contact Information51
- Start up52
- Prior to Start up52
- Initial Start up52
  - Supply Gas Pressure Adjustment54
  - Manifold Gas Pressure Adjustment54
- Checking the Firing Rate55
- High Altitude Installations55
- Lighting the Water Heater56
- Lighting & Operation Labels56
  - For Your Safety Read before Operating57
  - Operating Instructions57
  - To Turn off Gas to Appliance57
- Troubleshooting58
- Installation Checklist58
- Sequence of Operation58
- Sequence of Operation Flow Chart59
- Operational Problems60
- Fault and Alert Conditions61
  - Fault and Alert Messages62
  - Ignition Failure62
  - Low Igniter Current62
  - Blower Prover Open63
  - Blocked Air Intake63
- Maintenance64
- General64
- Maintenance Schedule64
- Draining and Flushing64
- Filling the Water Heater65
- Sediment Removal65
- Lime Scale Removal65
- Powered Anode Rods66
- Drain Valve and Access Panels66
- Vent System66
- Diagrams67
- CCB - Central Control Board Layout67
BTH 120 & 150 Wiring Diagram68
- BTH 199 & 250 Wiring Diagram69
- Circulation Pump Wiring Diagrams70
- Water Piping Diagrams71
- Limited Warranty78

A.O. Smith BTH-120 - Venting Arrangements (Continued); Direct Vent Vertical Vent Horizontal Intake; Direct Vent Horizontal Vent Vertical Intake; Direct Vent Vertical Concentric

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