A.O. Smith 750 SERIES User's Manual

A.O. Smith Water Heater User's Manual - 750 SERIES.
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A DIVISION OF A. O. SMITH CORPORATION

MC BEE, SC., RENTON, WA.,

STRATFORD-ONTARIO,  VELDHOVEN-THE NETHERLANDS

www.hotwater.com

 GAS-FIRED COMMERCIAL

 COPPER BOILERS FOR HYDRONIC

 HEATING AND HOT WATER SUPPLY

USER'S INFORMATION MANUAL

GB/GW-300, 400, 500, 650, 750

SERIES 400, 401, 402, 403, 404, 405,

2-STAGE UNITS

  WARNING

Should overheating occur or the gas supply fail to shut off, do
not turn off or disconnect the electrical supply to the pump.
Instead, shut off the gas supply at a location external to the
appliance
.

PLEASE KEEP THESE INSTRUCTIONS ADJACENT TO BOILER AND

NOTIFY OWNER TO KEEP FOR FUTURE REFERENCE.

 PART NO. 212132-001

PRINTED IN U.S.A. 0306

INDEX

PAGE

LIGHTING INSTRUCTIONS ....................................... 2-3

MAINTENANCE .......................................................... 3-4

OPERATING SEQUENCE, EMC5000 ......................... 8-14

CONNECTION DIAGRAM ............................................ 13

EMC5000 INSTRUCTIONS ...................................... 14-18

WARRANTY ................................................................. 19

  WARNING

Do not use this boiler if any part has been under water.
Immediately call a qualified service technician to inspect the
boiler and to replace any part of the control system and any
gas control which has been under water.

 CAUTION

TEXT PRINTED OR OUTLINED IN RED CONTAINS
INFORMATION RELATIVE TO YOUR SAFETY.  PLEASE READ
THOROUGHLY BEFORE INSTALLING AND USING THIS
APPLIANCE.

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.

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