A.O. Smith
VB/VW- 750, VB/VW- 1000
instruction manual
General Safety
Troubleshooting
Install
Wiring Diagram
Connecting Vent to Boiler
Warranty
Dimension
Maintenance
UIM Operating Procedures
Adjustment
Recovery Capacities
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GENERAL SAFETY
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Contents
Models
Safe INSTALLATION, USE and Service
General Safety
GAS and Electrical Characteristics
Dimension and capacity data
Capacity and Flow data
Recovery Capacities
Introduction
Contents
Grounding Instructions
Precautions
High Altitude Installations
Field Installed Components
Control Components
Circulating Pump
Water Temperature Limit Controls
ON/OFF Switch
Temperature Probes
VB HOT Water Heating BOILERS, are shipped with a 50 psi
Required Ability
Location
Panels and Covers
Air Requirements Breathing Hazard Carbon Monoxide Gas
Installtion Clearances
Chemical Vapor Corrosion
Leveling
Outdoor Air Through Two Vertical Ducts
Outdoor Air Through Two Openings
Outdoor Air Through One Opening
OutdoorAir Through Two HorizontalDucts
Air From Other Indoor Spaces
Power Vent
Termination Clearances Sidewall Power Vent
Direct Vent
Termination Clearances Sidewall Direct Vent
Special Installation Considerations
Venting System Using AL 29-4C
Connecting Vent to Boiler
Vertical Installation Requirements
Horizontal Installtion Requirements
Venting Supports
Vertical Termination
BELOW. Keep Clear of ALL Obstructions
Direct Vent Installation Requirements
Direct Vent Horizontal
Direct Vent Using TWT with Vertical Intake
System installation
General
Hot Water Heating Hydronic Equipment
Thermal Expansion Closed System
Remote Probe Installation Procedure
Internal Contaminants
Hard Water Conditions
Gas Supply Line Sizing
Gas Connections
Typical PRIMARY, Secondary Piping
ONE VF Model VW HOT Water Supply Boiler with Vertical Tank
ONE VF Model VW HOT Water Supply Boiler with Horizontal Tank
Wiring
Suggested Pipe Size For Multiple Gas Appliances Propane Gas
Suggested Pipe Size For Multiple Gas Appliances Natural Gas
Connection Diagram
Wiring Diagram
Page
VB/VW-500, 750 & 1000 Schematic Diagram
Purging Gas Line
Filling and Purging of Heating Boiler Installation
Filling Hot Water Supply Boiler Installation
Operation
Risk of Scalds
Water Temperature Regulation
MCB Ten Position Dipswitch
MCB/FCB Dipswitches
MCB Three position Dipswitch
Lighting & Operation Instructions for Models VB/VW 500, 750
Propane
Adjustment
Setting of the Test Mode
High Fire Setting Natural GAS
Inputs to MCB
Operating Sequence
Temperature Setpoints System Control Algorithm
UIM Operating Procedures
Description of FCB control states
OperatingSetpointAdjustmentProcedure
HighLimitDifferentialSetpointAdjustment Procedure
UIM LED’s
Fault Messages and Troubleshooting Guide
Fault Displayed Description Red LED Lockout
Troubleshooting Ignition System
Preventative maintenance
Troubleshooting Gas Valve
Main Burner
Blower Compartment
Burner Maintenance
Relief Valve
Combustion Air Filter
Replacement Parts
Venting Maintenance
HeatExchangerPreventativeMaintenance
Tube Cleaning Procedure Mechanical Removal of Deposits
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Limited Warranty
Tennessee Waltz Parkway, Ashland City, TN Phone
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