A.O. Smith BTP(V)-540A, 650A, 740A warranty Start UP, Heater Wiring, Purging, Filling

HEATER WIRING

IF ANY OF THE ORIGINAL WIRE AS SUPPLIED WITH THE APPLIANCE MUST BE REPLACED, IT MUST BE REPLACED WITH 105°C WIRE OR ITS EQUIVALENT, EXCEPT IN THE BURNER HOUSING USE 200°C WIRE.

The power burner is wired to the heater as shown in Figure 11 for BTP models and Figure 12 for BTPV models. The model and rating plate provided the electrical information needed to size the complete heater branch supply.

All electrical work must be installed in accordance with the National Electrical Code and local requirements.

When installed, the appliance must be electrically grounded in accordance with local codes or, in the absence of local codes, with the National Electrical Code, ANSI/NFPA 70-1987.

DONOTENERGIZETHEBRANCHCIRCUITBEFORETHEHEATER TANK IS FILLED WITH WATER.

START UP

IMPORTANT

AUTHORIZED START-UP REQUIRED. Start-up by an A.O. Smith Authorized BTP Start-Up Agent is required on the model covered by this manual. Start-up and Operation of this unit by other than an Authorized BTP Start-Up Agent will void the warranty.

If you have not already done so, contact your local A.O. Smith Sales Representative or Authorized BTP Start-Up Agent and set-up a date for the start-up service.

The time to ask any questions you may have about your unit is when the A.O. Smith Authorized BTP Start-Up Agent is there. Please do not hesitate to ask the agent any questions which you may have regarding the units start-up, operation or maintenance.

CAUTION

BEFORE PROCEEDING WITH THE OPERATION OF THE UNIT, MAKE SURE HEATER AND SYSTEM ARE FILLED WITH WATER AND ALL AIR IS EXPELLED FROM HEATER AND PIPING.

NEVER OPERATE THE HEATER WITHOUT FIRST BEING CERTAIN IT IS FILLED WITH WATER AND A TEMPERATURE AND PRESSURE RELIEF VALVE IS INSTALLED IN THE RELIEF VALVE OPENING OF THE HEATER.

FILLING

1. Close the heater drain valve by turning handle clockwise.

2.Open a nearby hot water faucet to permit the air in the system to escape.

3.Fully open the cold water inlet pipe valve allowing the heater and piping to be filled.

4.Close the hot water faucet as water starts to flow.

5.The heater is ready to be operated.

PURGING

Gas line purging is required with new piping or systems in which air has entered.

CAUTION

PURGINGSHOULDBEPERFORMEDBYPERSONSEXPERIENCED IN THIS TYPE GAS SERVICE. TO AVOID RISK OR FIRE OR EXPLOSION, PURGE DISCHARGE MUST NOT ENTER CONFINED AREA OR SPACES WHERE IGNITION CAN OCCUR. THE AREA MUST BE WELL VENTILATED AND ALL SOURCES OF IGNITION MUST BE INACTIVATED OR REMOVED.

The following test equipment should be on hand: (all test equipment must be acclimated to ambient temperature before calibration and use.)

–CO2 indicator (Fyrite or similar) or O2 analyzer

–CO indicator (Monoxor or similar)

–Stack thermometer

–Draft Gauge or inlined manometer

–Two U-Tube manometers or calibrated 0-10” and 0-35” w.c. pressure gauges

–Combination volt/ammeter

•Attach a gas pressure gauge or manometer to upstream side of main gas cock and a gas pressure gauge or manometer to the manifold pressure tapping.

•Check voltage at disconnect switch to make certain that it matches that shown on the burner label.

•Apply a few drops of No. 20 SAE non-detergent oil to motor bearings.

•Drill max. 5/16” hole in breeching as close as possible to flue connection on heater to install stack thermometer and combustion analyzing equipment, see Figure 4.

•You are now ready to begin the burner start-up procedure.

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