American Water Heater Commercial Ultra Low NOx Gas water Heater Table Of Contents, Precautions

TABLE OF CONTENTS

Page Page

ROUGH-IN DIMENSIONS	2
FOREWORD	2
GENERAL SAFETY INFORMATION	2-4
Precautions	3
Grounding Instructions	3
Chemical Vapor Corrosion	3
Extended Non-use Periods	3
Insulation Blankets	4
High Altitude Installations	4
Circulating Pump	4
INSTALLATION INSTRUCTIONS	4-9
Required Ability	4
Locating The Heater	4
Clearances	5
Hard Water	5
Air Requirements	5
Venting	6
Thermometers (Not Supplied)	7
Combination Water (Potable) Heating and Space Heating	7
Relief Valve	7
Gas Piping	7
Heater Wiring	8
Wiring Diagram	8
Purging	9
Gas Pressure Regulation	9
OPERATION	9

To Operate The Heater	9
Lighting Instructions	10
Temperature Regulation	11
Checking Venting	11
High Temperature Limit Switch	11
SERVICE INFORMATION	12-13
Main Burner and Igniter	12
Checking Gas Input	12
Vent System	12
Blower Maintenance	13
Relief Valve	13
Hot Water Odor	13
Winter Protection	13
Replacement Parts	13
PREVENTIVE MAINTENANCE	13-14
Procedure for Periodic Removal Of Lime Deposits	13
Deliming Solvents	13
Tank Cleanout Procedure	14
CHECKLIST	15-16
Condensation	15
Anode	15
Service & Repair	16
TROUBLESHOOTING	17-20
NOTES	21-22
LIMITED WARRANTY	23

GENERAL SAFETY

INFORMATION

PRECAUTIONS

DO NOT USE THIS water heater IF ANY PART HAS BEEN UNDER WATER. Immediately call a qualified service technician to inspect the appliance and to replace any part of the control system and any gas control which has been under water.

IF THE UNIT IS EXPOSED TO THE FOLLOWING, DO NOT OPERATE HEATER UNTIL ALL CORRECTIVE STEPS HAVE BEEN MADE BY A QUALIFIED SERVICEMAN.

1.EXTERNAL FIRE.

2.DAMAGE.

3.FIRING WITHOUT WATER.

4.SOOTING.

Heater must be protected from freezing downdrafts during shutdown periods.

GROUNDING INSTRUCTIONS

This water heater must be grounded in accordance with the National Electrical Code and/or local codes. These must be followed in all cases.

This water heater must be connected to a grounded metal, permanent wiring system; or an equipment grounding conductor must be run with the circuit conductors and connected to the equipment grounding terminal or lead on the water heater, see Figure 5.

CHEMICAL VAPOR CORROSION

WARNING

CORROSION OF THE FLUEWAYS AND VENT SYSTEM MAY OCCUR IF AIRFORCOMBUSTIONCONTAINSCERTAINCHEMICALVAPORS. SUCH CORROSION MAY RESULT IN FAILURE AND RISK OF ASPHYXIATION.

Spray can propellants, cleaning solvents, refrigerator and air conditioning refrigerants, swimming pool chemicals, calcium and sodium chloride (water softener salt), waxes, and process chemicals are typical compounds which are potentially corrosive. Do not store products of this sort near the heater. Also, air which is brought in contact with the heater should not contain any of these chemicals. If necessary, uncontaminated air should be obtained from remote or outside sources. The limited warranty is voided when failure of water heater is due to a corrosive atmosphere. (Refer to the limited warranty for complete terms and conditions.)

EXTENDED NON-USE PERIODS

WARNING

HYDROGEN GAS CAN BE PRODUCED IN A HOT WATER SYSTEM SERVED BY THIS HEATER THAT HAS NOT BEEN USED FOR A LONG PERIOD OF TIME (GENERALLY TWO WEEKS OR MORE). HYDROGEN GAS IS EXTREMELY FLAMMABLE. To reduce the risk of injury under these conditions, it is recommended that the hot water faucet be opened for several minutes at the kitchen sink before using any electrical appliance connected to the hot water system. If hydrogen is present, there will probably be an unusual sound such as air escaping through the pipe as the water begins to flow. THERE SHOULD BE NO SMOKING OR OPEN FLAME NEAR THE FAUCET AT THE TIME IT IS OPEN.

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