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A.O. Smith
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Water Heater
A.O. Smith
400, 402, 401, 403, 405, 404
instruction manual
PDB Power Distribution Board Diagram
Models:
405
403
404
402
400
401
1
30
48
48
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48 pages
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Install
Wiring Connections
Warranty
Dimension
GAS Manifold Assembly
UIM Operating Procedures
Adjustments
Recovery Capacities
Temperature Screen
Replacement Parts
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Image 30
Figure 19. PDB POWER DISTRIBUTION BOARD Diagram
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Contents
Installation Operation Maintenance Limited Warranty
Copper Boilers for Hydronic Heating HOT Water Supply
DIMENSIONS/CAPACITIES Data
Dimensional Data
GAS and Electrical Requirement
Dimensions Data for Outdoor Configuration
Recovery Capacities
Foreword
FEATURES/CONTROLS
Water Flow Switch
Differential Pressure Switch Combustion AIR Blower
Blocked Flue Pressure Switch
ON/OFF Switch
Required Ability
Installation Instructions
Safety Relief Valves
Location
Levelling
Installation Clearances
Chemical Vapor Corrosion
AIR Requirements
Venting
Horizontal Vent Installation
INTAKE/EXHAUST Installation Requirements
System Installation
Installation AS Boiler Replacement
General
Equivalent
Standard Vent Vertical Category
Type B or
16 40.6 cm
Steel
Standard Vent Horizontal Category
III Stainless
III
Direct Vent Vertical Exhaust Configurations
Direct Vent Vertical Category
Stainless GAL. Steel Sealed
Direct Vent Horizontal Exhaust Configurations
Direct Vent Horizontal Category
Stainless GAL.STEEL
Hydronic Installation
Space Heating Applications
Internal Contaminants
VAC System Controller Optional
Hard Water Conditions
Tank Probe Installation Procedure
GAS Connections Water Line Connections
Tank Probe Optional
Single boiler with horizontal tank
Single boiler with vertical tank
Suggested Pipe Size For Multiple Gas Appliances Propane Gas
Distance from Meter BTU Input
Single Unit INSTALLATION, Suggested Pipe Size
Wiring Connections
BTU/HR
GAS Manifold Assembly
Genesis GB/GW 1000-2500 Series 400 Wiring Diagram
Page
Genesis GB/GW 1000-2500 Series 400 Schematic Diagram
Page
CCB Central Control Board
FCB Flame Control Board Diagram
PDB Power Distribution Board Diagram
Purging of GAS Line
Operation
Filling and Purging Water System
Inlet GAS Pressure
For Your Safety Read Before Operating
For Your Safety Read Before Operating
Setting Degree Burns on Adult Skin
Adjustments
Risk of Scalds Temperature
Control System
Water Level Sensor open condition indicates fault
Air Pressure Sensors open condition indicates fault
Gas Pressure Sensors open condition indicates fault
CCB/FCB Indicator Lamps & Fuses
CCB Ten Position Dipswitch Central Control Section SW1
CCB-SW2
FCB Eight-Position Dipswitch
Operating Sequence
Stages 1 and 2 will turn on in sequence from 1 to
Temperature Setpoints System Control Algorithm
UIM Operating Procedures
UIM Screens
Menu Screen
Temperature Screen
Status Displayed True Condition Input
System Status Screen
Description of FCB control states
Operating Setpoint Adjustment Procedure
High Limit Differential Setpoint Adjustment Procedure
Operating Differentialsetpoint Adjustment Procedure
Fault Displayed Description Redled Lockout
Hard
Main Burners
Tank Probe Tank Remote probe shorted or open Flashing
Deliming
Replacement Parts
Tubecleaningprocedure Mechanical Removal of Deposits
NEW Boiler Limited Warranty
Conditions and Exceptions
Tennessee Waltz Parkway, Ashland City, TN Phone
