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GAS-FIRED POWER BURNER
COPPER BOILERS FOR HYDRONIC HEATING
AND HOT WATER SUPPLY
USER’S MANUAL
• Installation
MODELS:
• Operation
VB/VW-500, 750 AND 1000
• Maintenance
SERIES 100/101
• 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 SMEL
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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. Read and obey all safety messages and instructions throughout this manual. It is very important that the meaning of each safety message is understood by you and others who install, use, or se
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GENERAL SAFETY 3
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CONTENTS SAFE INSTALLATION, USE, AND SERVICE ....................................................................................................................................... 2 GENERAL SAFETY ................................................................................................................................................................................ 3 TABLE OF CONTENTS .........................................................................................................
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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 dec
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6 CONNECTION DIAGRAM
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7
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VB/VW-500, 750 & 1000 SCHEMATIC DIAGRAM SCHEMATIC DIAGRAM 8
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LIGHTING & OPERATION INSTRUCTIONS FOR MODELS VB/VW 500, 750 AND 1000: 9
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children to use a hot water tap, or to draw their own bath water. Never leave a child or disabled person unattended in a bathtub or shower. The boiler should be located in an area that is inaccessible to the general public. TABLE 1. Risk of Scalds. Temperature Time to Produce 2nd & 3rd Setting Degree Burns on Adult Skin Over 170°F (77°C) Nearly instantaneous 160°F (71°C) About 1/2 second 150°F (66°C) About 1-1/2 seconds 140°F (60°C) Less than 5 seconds 130°F (54°C) About 30 seconds WATER TE
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sequences and safety features associated with a gas ignition Pump (MCB - 120VAC - required on systems that do not have an control system. The system continuously performs various external pump): Provides electrical power to directly operate a pump diagnostic tests to verify proper appliance and control or the coil of an externally connected contactor. operation. Should an unsafe condition occur, the control will Blower (MCB - 120VAC - required): Variable speed blowers utilize shut down the burne
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the temperature is less than the operating setpoint minus the The UIM receives commands from the user and displays differential temperature and the thermostat input is closed then operational information to the user via an LCD (liquid crystal a call for heat is established and the system shifts to the run display) up to eleven LED's, and five touch switches. The LCD mode (green "Running" LED turns on). provides information to the user by the use of 10 menu-activated screens. Within each of the
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if the blower prover does not activate after 15 seconds. This 5. Press the SELECT KEY. time allows the blower relay to activate, the blower to come up 6. Use the UP and DOWN key to select the value you wish to enter. to speed, and the response from the blower prover to be filtered. 7. Press the SELECT key to accept and store the new value. • User Settings Screen: Each setpoint or user setting has either a limited selection of • High Limit Differential: values, or a limited range of values. The
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From the Current Error Screen this key is used to reset the kBtu rating of the boiler (0 to 5750kBtu in 10kBtu increments) system from an error: The software revision level of the MCB. • Current Error Screen: • Up and Down Keys: Displays the last error that the system has detected plus a These keys are used to move upwards and downwards in time stamp of when the error occurred. (The time stamp is screens to reach a desired item and to change setpoints based on the elapsed hours value at the time
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TROUBLESHOOTING IGNITION SYSTEM Fault Messages and Lockout Status (* = stage number: 1, 2, 3, or 4) FAULT DISPLAYED DESCRIPTION RED LED LOCKOUT “Display Fail” Communications with UIM interrupted Continuous Auto Reset 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. Fail Stg.*” Communications with FCB interrupted Continuous Auto Reset Same as above. Also try
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PREVENTATIVE MAINTENANCE MAIN BURNER 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 Check main burner every three months for proper flame deck approximately 1/8” and blue in color, see illustration. characteristics. The main burner should display the following characteristics: • Provide complete combustion of gas. � Cause rapid ignition and carry over of flame across entire burner. � Give reasonably quiet operati
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or on the blower and motor. Buildups of dirt and lint on the blower and motor can create excessive loads on the motor resulting in higher that normal operating temperatures and possible shortened service life. BURNER MAINTENANCE Qualified servicers should follow this procedure when the boiler’s burner needs cleaning. 1. Turn off the electrical power to the boiler and close the main manual gas shutoff valve(s). Allow the boiler parts to cool before Any safety devices including low water cutoffs
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NOTES 20
