A.O. Smith ***81-199 Specifications download pdf (Page 17)

PRIOR TO START UP

IMPORTANT

IT IS REQUIRED THAT A QUALIFIED PERSON PERFORM THE

INITIAL FIRING OF THE HEATER. AT THIS TIME THE USER

SHOULD NOT HESITATE TO ASK THE INDIVIDUAL ANY

QUESTIONS WHICH HE MAY HAVE IN REGARD TO THE

OPERATION AND MAINTENANCE OF THE UNIT.

A CHECKLIST AND SERVICE INFORMATION section is included

at the rear of this manual. By using this checklist the user may

be able to make minor operational adjustments and save himself

unnecessary service calls. However, the user should not attempt

repairs which are not listed in this section.

REQUIRED EQUIPMENT AND ABILITY

INSTALLATION OR SERVICE OF THIS WATER HEATER

REQUIRES ABILITY EQUIVALENT TO THAT OF A LICENSED

TRADESMAN IN THE FIELD INVOLVED. PLUMBING, AIR

SUPPLY, VENTING, GAS SUPPLY AND ELECTRICAL WORK

ARE REQUIRED.

Before attempting start-up, thoroughly study and familiarize

yourself with the exact sequence of operation and all other details

on the specific heater being used.

The power burner is equipped with a direct spark ignition system

and automatically sequences prepurge and ignition, senses and

ignites main burner flame and sequences burner operation.

Heater is equipped with an ignition module which locks out after

an unsuccessful ignition attempt. Turn off electric power for ten

seconds before restarting.

Be certain that water heater is full of water, that air is purged from

all lines, no leaks (gas and water) and all inlet water lines are

open.

The following test equipment should be on hand: (all test

equipment must be acclimated to ambient temperature before

calibration and use.)

–CO

indicator (Fyrite or similar) or O

analyzer

– CO indicator (Monoxor or similar)

– Stack thermometer

– Draft Gauge or inclined 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 fig. 4).

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

Follow the OPERATIONAL PROCEDURE in the OPERATIONAL

AND ADJUSTMENT PROCEDURE section of this manual.

PURGING

Gas line purging is required with new piping or systems in which

air has entered.

CAUTION

PURGING SHOULD BE PERFORMED BY PERSONS

EXPERIENCED IN THIS TYPE GAS SERVICE. TO AVOID RISK

OF FIRE OR EXPLOSION, PURGE DISCHARGE MUST NOT

ENTER CONFINED AREAS OR SPACES WHERE IGNITION

CAN OCCUR. THE AREA MUST BE WELL VENTILATED AND

ALL SOURCES OF IGNITION MUST BE INACTIVATED OR

REMOVED.

WATER TEMPERATURE CONTROL

DANGER

THIS WATER HEATER IS EQUIPPED WITH AN ADJUSTABLE

THERMOSTAT TO CONTROL WATER TEMPERATURE. HOT

WATER TEMPERATURES REQUIRED FOR AUTOMATIC

DISHWASHER AND LAUNDRY USE CAN CAUSE SCALD

BURNS RESULTING IN SERIOUS PERSONAL INJURY AND/

OR DEATH. THE TEMPERATURE AT WHICH INJURY OCCURS

VARIES WITH THE PERSON’S AGE AND TIME OF EXPOSURE.

THE SLOWER RESPONSE TIME OF CHILDREN, AGED OR

DISABLED PERSONS INCREASES THE HAZARDS TO THEM.

NEVER ALLOW SMALL 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 WATER HEATER SHOULD BE LOCATED IN AN AREA

WHERE THE GENERAL PUBLIC DOES NOT HAVE ACCESS

TO SET TEMPERATURES.

SETTING THE WATER HEATER TEMPERATURE AT 120°F

WILL REDUCE THE RISK OF SCALDS. Some states or provinces

require settings at specific lower temperatures.

Below you will find listed Table 5 the approximate time-to-burn

relationship for normal adult skin. Short repeated heating cycles

caused by small hot water uses can cause temperatures at the

point of use to exceed the thermostat setting by up to 20°F (11°C).

If you experience this type of use, you should consider using

lower temperature settings to reduce scald hazards.

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A.O. Smith ***81-199 Specifications Page 17

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