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GAS-FIRED POWER BURNER
COPPER BOILERS FOR HYDRONIC HEATING
AND HOT WATER SUPPLY
• Installation
• Operation
• Maintenance
• Limited Warranty
WARNING: If the information in this
manual is not followed exactly, a fire or
explosion may result causing property
damage, personal injury or loss of life.
— Do not store or use gasoline or other
flammable vapors and liquids in the
vicinity of this or any other appliance.
— WHAT TO DO IF YOU SMELL GAS:
• Do not try to light any appliance.
• Do not touch any electrical switch; do
not use any phone in your building.
• Immediately call your gas supplier
from a neighbor’s phone. Follow the
gas supplier’s instructions.
• If you cannot reach your gas supplier,
call the fire department.
— Installation and service must be
performed by a qualified installer,
service agency or the gas supplier.
PRINTED 0207
USER’S MANUAL
MODELS:
VB/VW-500, 750 AND 1000
SERIES 100/101
MC BEE, SC., RENTON, WA.,
STRATFORD-ONTARIO, VELDHOVEN-THE NETHERLANDS,
NANJING, CHINA
www.hotwater.com / email: parts@hotwater.com
212801-000
Page 1
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Table of Contents
Troubleshooting
Related Manuals for A.O. Smith 1000 SERIES 100
Summary of Contents for A.O. Smith 1000 SERIES 100
- Page 1 GAS-FIRED POWER BURNER COPPER BOILERS FOR HYDRONIC HEATING AND HOT WATER SUPPLY • Installation • Operation • Maintenance • Limited Warranty WARNING: If the information in this manual is not followed exactly, a fire or explosion may result causing property damage, personal injury or loss of life.
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Page 2: Safe Installation, Use And Service
SAFE INSTALLATION, USE AND SERVICE Your safety and the safety of others is extremely important in the installation, use, and servicing of this boiler. Many safety-related messages and instructions have been provided in this manual and on your own boiler to warn you and others of a potential injury hazard. -
Page 3: General Safety
GENERAL SAFETY... -
Page 4: Table Of Contents
SAFE INSTALLATION, USE, AND SERVICE ... 2 GENERAL SAFETY ... 3 TABLE OF CONTENTS ... 4 Installation Requirements for the Commonwealth of Mass ... 5 Wiring Diagram ... 6-7 Schematic Diagram ... 8 Lighting and Operating Instructions ... 9 Water Temperature Regulation ... 10 Control System ... -
Page 5: Installation Requirements For The Commonwealth Of Mass
INSTALLATION REQUIREMENTS FOR THE COMMONWEALTH OF MASSACHUSETTS For all side wall terminated, horizontally vented power vent, direct vent, and power direct vent gas fueled water heaters installed in every dwelling, building or structure used in whole or in part for residential purposes, including those owned or operated by the Commonwealth and where the side wall exhaust vent termination is less than seven (7) feet above finished grade in the area of the venting, including but not limited to decks and porches, the following requirements shall be satisfied:... -
Page 8: Schematic Diagram
VB/VW-500, 750 & 1000 SCHEMATIC DIAGRAM SCHEMATIC DIAGRAM... -
Page 9: Lighting And Operating Instructions
LIGHTING & OPERATION INSTRUCTIONS FOR MODELS VB/VW 500, 750 AND 1000:... -
Page 10: Water Temperature Regulation
If the inlet water temperature into the boiler is less than 120°F (49°C), adjustments on the water bypass are needed. Please contact your A.O. Smith qualified service agent. CONTROL SYSTEM The EMC modulation control system is a fully integrated, state of the art electronic control system. -
Page 11: Control System
sequences and safety features associated with a gas ignition control system. The system continuously performs various diagnostic tests to verify proper appliance and control operation. Should an unsafe condition occur, the control will shut down the burner and display a red service light as well as indicate the cause of the error on the display. -
Page 12: Uim Operating Procedures
the temperature is less than the operating setpoint minus the differential temperature and the thermostat input is closed then a call for heat is established and the system shifts to the run mode (green "Running" LED turns on). The heating sequence begins by applying power to the pump. After a few seconds the blower is turned on for 30-second pre-purge period of combustion chamber. - Page 13 waits for a heat request (determined by the Thermostat or controlling probe inputs). All outputs are off in this state except that if the Post-Circulate time is set to continuous, the pump will be on. When the heat request is received, the system moves to the Pre-Circulate state.
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Page 14: Operating Setpoint Adjustment Procedure
Network Address: This is a unique number assigned to this boiler to differentiate it from other boilers or water heater on the same A. O. Smith proprietary network. A valid Network Address can be any number from 0 to 31. It is set by default to zero, which is an invalid address. - Page 15 kBtu rating of the boiler (0 to 5750kBtu in 10kBtu increments) The software revision level of the MCB. • Current Error Screen: Displays the last error that the system has detected plus a time stamp of when the error occurred. (The time stamp is based on the elapsed hours value at the time the error occurred.
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Page 16: Troubleshooting Ignition System
Fault Messages and Lockout Status (* = stage number: 1, 2, 3, or 4) FAULT DISPLAYED DESCRIPTION “Display Fail” Communications with UIM interrupted Check communication cable to UIM. Try moving to other Internal Communications connector on MCB. Also check the connectors where the cable is plugged in for best connecting wires. “Comm. -
Page 17: Troubleshooting Gas Valve
PREVENTATIVE MAINTENANCE This is a pre-mix burner system. The flame is not supposed to be directly on the burner. The flame should be just above the burner deck approximately 1/8” and blue in color, see illustration. BURNER FLAMES Visually check flame characteristics through the view port located on the top head of the boiler. -
Page 18: Relief Valve
Any safety devices including low water cutoffs used in conjunction with this boiler should receive periodic (every six months) inspection to assure proper operation. A low water cutoff device of the float type should be flushed every six months. Periodic checks, at least twice a year, should be made for water leaks. -
Page 19: Venting Maintenance
lines with air or water and clear or replace the blocked portions of the line as necessary. Note that areas of the drain line which include a sag or low spot in the line will also form a condensate trap which can be removed by levelling the tube and does not indicate a blocked system. - Page 20 NOTES...
- Page 22 NOTES...
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Page 23: Limited Warranty
A. O. Smith Corporation, the warrantor, extends the following LIMITED WARRANTY to the owner of this boiler: 1. If within TEN years after initial installation of the boiler, a heat exchanger or gas burner shall prove upon examination by the warrantor to be defective in material or workmanship, the warrantor, at his option will exchange or repair such part or portion. - Page 24 500 Tennessee Waltz Parkway, Ashland City, TN 37015 Phone: 800-433-2545 www.hotwater.com E-Mail: parts@hotwater.com...