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Before starting the boiler, please review the boilers instruction manual (AOS Part Number 212800) supplied with the boiler. This
is a powered combustion copper tube boiler. Please contact an authorized A.O. Smith representative before starting the unit.
Ensure that the water piping, gas line, controls, and venting have been installed per the instruction manual.
Gas supply lines should be sized in accordance with the current edition of National Fuel Gas Code (ANSI Z223.1/NFPA 54) or
CAN/CSA B149.1 The Canadian Natural Gas and Propane Installation Code.
Make sure the boiler is not damaged. If the unit is damaged, contact an A.O. Smith representative for service or replacement
parts prior to starting the boiler.
This boiler is equipped with a Modulating EMC 5000 control system. The EMC 5000 displays the system status and errors that may
occur during normal operation. For full details on the controls, please refer to the Installation Manual supplied with the boiler. The
boiler must be installed according to the instructions provided with the unit. Failure to do so will void the warranty.
The following test equipment should be on hand: (all test equipment must be acclimated to ambient temperature before calibration
and use.)
• A combustion analyzer capable of measuring CO and CO
• A digital manometer or pressure gauges capable of accurately displaying 0 – 15 (± .01) inches of water column.
• Combination volt/ammeter
• TORX® T40 or 5mm hex wrench – for setting gas mixture at gas valve
• 3mm or 7/64 in hex wrench – for setting gas mixture at gas valve
I. Verify utilities
• Ensure that the water piping, gas line, controls, and venting have been installed per the instruction manual.
• Be certain that the system is full of water, that air is purged from all lines, the boiler, and storage tank.
• Ensure that no leaks are present and that all supply and return water valves are open.
• Upstream gas valve should remain closed until start up.
II. Component Sequence Verification
• Ensure that the power supply meets these requirements: single phase, Minimum: 108 VAC RMS; Maximum: 132 VAC RMS
and is on a dedicated circuit breaker with separate neutrals and grounds.
• Ensure all control wiring is run in a dedicated conduit per instruction manual.
• Perform power supply test outlined in the instruction manual.
• Ensure that the upstream manual gas valve of the boiler is open.
Prior to turning on the gas, proper sequence of most of the system can be verified. With the water turned on, and the gas turned
off by the downstream manual valve, start the system and allow it to run through a heating cycle. It should stop when it checks for
the flame and declare a fault. This will verify that the pump, flow switch, igniter, variable frequency drive, modulating gas valve,
blower and low/ high blower prover switches are all functioning properly.
III. Initial Boiler Set-up Verification
• Drill a maximum 7/16" hole in the side of the vent boot tee approximately 8" from back panel to insert the gas analyzer probe.
The hole must be sealed upon completion of the start-up testing.
• Open the downstream manual gas valve to the boiler and purge air from the line.
PRINTED 0608
Start-up Instructions
VB/VW 500/750/1000
Series 100/101
or O
.
2
2
212936-002
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Summary of Contents for A.O. Smith VB/VW 500/750/1000
- Page 1 Gas supply lines should be sized in accordance with the current edition of National Fuel Gas Code (ANSI Z223.1/NFPA 54) or CAN/CSA B149.1 The Canadian Natural Gas and Propane Installation Code. Make sure the boiler is not damaged. If the unit is damaged, contact an A.O. Smith representative for service or replacement parts prior to starting the boiler.
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Page 2: Boiler Start-Up
• Measure the incoming gas pressure. -Minimum inlet gas supply pressure of 4” w.c. and maximum is 11.0 for natural gas or 8” w.c. min and 13.8 max for propane. The maximum value specified must not be exceeded under both load and no load conditions. If this condition can not be obtained a positive lock-up type pressure regulator MUST be installed approximately five feet away from the gas valve of the boiler and per the regulator manufacture’s instructions. • Check all gas supply lines for leaks. • Check that all venting is properly installed in accordance with the venting section of the instruction manual. Follow the lighting and operating instructions in the Instruction Manual. IV. Boiler Start-Up • Starting the boiler for the first time - The boiler is tested at the factory and should start properly if installed in accordance with the boiler’s instruction manual. - Before starting the boiler, refer to the temperature set-point procedure section in the boilers instruction manual. - Turn on the boiler’s on/off switch. Ensure the operating set point is set high enough to activate a call for heat. If an external control is using the boiler’s Enable/Disable circuit, ensure that the external control’s contacts are closed. If there is no external control, ensure that the two wires provided for this circuit are wire-nutted together in the junction box on the back... - Page 3 • If combustion measurements are not in the range specified, please repeat the Setting of the test mode and Maximum and Minimum fire adjustment procedure as described previously. Start Up Record Start-up Date ______________________ Model Number _____________________ Series Number______________________ Gas type:___________ Power supply voltage: Hot /Gnd______ VAC, Hot /Neutral ______ VAC, Neutral /Gnd______ VAC Inlet Gas Supply Pressure Inch W.C. Manifold Pressure Inch W.C. CO PPM Blower RPMs Flue Gas Temp (°F) Stack Pressure Inch W.C. DISPOSITION All tests and values specified must meet specifications prior to issuing this Start-up certificate. For any discrepancies, please explain below what action was taken to correct the problem. NOTIFICATION All test and values specified must meet specifications prior to issuing this start-up certificate. For any of the field tests performed, explain below what action was performed to correct the problem. The owner has been notified that corrections must be made to this installation. The owner acknowledges that changes must be made within 30 days, prior to start up being completed. Required Signature of Owner Maximum Fire Date...
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Page 4: Statement Of Compliance
Required Signature of Owner, contractor or installer For additional information please refer to the User’s Manual supplied with the boiler or contact: A.O. Smith Technical Services at 1-800-527-1953 Our Internet Site is another source of information 24 hours a day. -
Page 5: Instructions De Mise En Service
Avant de mettre la chaudière en marche, prendre connaissance du manuel d’instructions (n° de pièce AOS 212800) fourni avec l’appareil. Cette chaudière en cuivre est dotée d’un brûleur électrique. Consulter un représentant agréé d’A.O. Smith avant de mettre l’appareil en service. S’assurer que la tuyauterie d’eau et de gaz, les commandes et les conduits de ventilation sont installés conformément au manuel d’instructions. - Page 6 • Ouvrir le robinet manuel de gaz en aval de la commande de gaz et évacuer l’air de la conduite. • Mesurer la pression de l’alimentation en gaz. La pression d’alimentation en gaz doit se situer entre 4 po CE (1 kPa) et 11 po CE (2,74 kPa) pour le gaz naturel et entre 8 po CE (2 kPa) et 13,8 po CE (3,45 kPa) pour le propane.
- Page 7 • tableau des plages acceptables pour les niveaux des gaz de combustion échantillons sans air Dioxyde de carbone – gaz naturel : allure de chauffe maximale Dioxyde de carbone – gaz propane : allure de chauffe maximale Concentration de monoxyde de carbone Dioxyde de carbone –...
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Page 8: Déclaration De Conformité
Service technique d’a.o. Smith au 1 800 527 1953 notre site Web offre aussi de l’information en tout temps. déClaRation de ConFoRMité...