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A.O. Smith FPSH - 75 - page 1
1 PRINTED IN U.S.A. 0703 P ART NO. 195785-000 GAS MODELS FPSH - 75 270 Series with Hot Surface Ignition Thank you for buying this energy efficient water heater from A.O. Smith W ater Products Company . We appreciate your confidence in our products. Y ou should thoroughly read this manual before installation and/ or operation of this water heater . ...
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A.O. Smith FPSH - 75 - page 2
2 *CAUTION HARNESS HAS 120 V AC. IN OPERA TION FIGURE 1 REPLACEMENT P ARTS AND DELIMING PRODUCTS Replacement parts and recommended delimer may be ordered through authorized servicers or distributors. Refer to the Y ellow Pages for your A. O. Smith plumber or contact the A. O. Smith W ater Product s Compan y , 5621 W . 1 15th S treet, Alsip, IL 6080 ...
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A.O. Smith FPSH - 75 - page 3
3 GENERAL SAFETY INFORMA TION EXTERNAL DAMAGE Do not operate the water heater until it has been fully checked out by a qualified technician, if the water heater: • Has been exposed to fire or damage. • Displays evidence of sooting. • Produces steam or unusually hot water . If the water heater has been subject to flooding it must be replaced. ...
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A.O. Smith FPSH - 75 - page 4
4 • Do not cover the instruction manual. Keep it on the side of the water heater or nearby for future reference. • Do obtain new warning and instruction labels from A.O. Smith for placement on the blanket directly over the existing labels. • Do inspect the insulation blanket frequently to make certain it does not sag, thereby obstructing comb ...
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A.O. Smith FPSH - 75 - page 5
5 CONFINED SP ACE When drawing combustion and dilution air from inside a conventionally constructed building to a confined space, such a space shall be provided with two permanent openings. ONE WITHIN 12 INCHES OF THE ENCLOSURE TOP AND ONE WITHIN 12 INCHES OF THE ENCLOSURE BOTTOM. Each opening shall have a free area of one square inch per 1000 Btuh ...
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A.O. Smith FPSH - 75 - page 6
6 REFER TO FIG . 1 FOR CONNECTION DET AILS. BEFORE A T T ACHING THE GAS LINE BE SURE THA T ALL GAS PIPE IS CLEAN ON THE INSIDE. T O TRAP A NY DIRT OR FOREIGN MA TERIAL IN THE GAS SUPPL Y LINE, A DIRT LEG (SOMETIMES CALLED DRIP LEG) MUST BE INCORPORA TED IN THE PIPING , FIG . 1. The dirt leg must be readily accessible. Install in accordance with rec ...
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A.O. Smith FPSH - 75 - page 7
7 BETWEEN THE RELIEF V AL VE AND T ANK. DO NOT PLUG THE RELIEF V AL VE. The drain line connected to this valve must not contain a reducing coupling or other restriction and must terminate near a suitable drain to prevent water damage during valve operation. The discharge line shall be installed in a manner to allow complete drainage of both the val ...
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A.O. Smith FPSH - 75 - page 8
8 NOTE: This unit can be vented using only PVC (Class 160, ASTM D-2241; Schedule 40, ASTM D-1785; or Cellular Core Schedule 40 DWV , ASTM F-891), Schedule 40 CPVC/ASTM F-441), or ABS/ASTM D-2661) pipe. The fittings, other than the TERMINA TION TEE should be equivalent to PVC-DWV fittings meeting ASTM D-2665 (Use CPVC fittings, ASTM F- 438 for CPVC ...
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A.O. Smith FPSH - 75 - page 9
9 3. Make sure that plastic tubing is still attached to the pressure switch and fan housing. Also make sure that wiring connector from motor to control box is securely attached. 4. Do not plug in power cord until vent system is completely installed. The Power V ent operates on 120 V ac, therefore a grounded outlet must be within reach of the 6 foot ...
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A.O. Smith FPSH - 75 - page 10
10 INST ALLA TION OF VENT SYSTEM, SIDEW ALL With the route of the venting system and selection of materials completed, as discussed in section of this manual titled PLANNING THE VENT SYSTEM, the through the wall vent terminal in place and the first section of piping, up to first elbow , installed at the blower it is time to complete the installatio ...
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A.O. Smith FPSH - 75 - page 11
11 2. SELECTION OF MA TERIALS • Cutting Device - Saw or Pipe Cutter • Deburring T ool, Knife, File, or Beveling Machine (2" and above) • Brush - Pure Bristle • Rag - Cotton (Not Synthetic) • Primer and Cleaner • Solvent Cement - PVC for PVC Components and CPVC for CPVC Components • Containers - Metal or Glass to hold Primer and C ...
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A.O. Smith FPSH - 75 - page 12
12 STEP E NOTE: Cans of cement and primer should be closed at all times when not in use to prevent evaporation of chemicals and hardening of cement. They are also very flammable and should be kept away from heat or flame. F . Joint assembly Working quickly , insert the pipe into the fitting socket bottom and give the pipe or fitting a 1/4" tur ...
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A.O. Smith FPSH - 75 - page 13
13 FOR YOUR SAFETY READ BEFORE OPERA TING W ARNING: If you do not follow these instructions exactly, a fire or explosion may result causing property damage, personal injury or loss of life. BEFORE OPERA TING: ENTIRE SYSTEM MUST BE FILLED WITH WA TER AND AIR PURGED FROM ALL LINES. A . This appliance does not have a pilot. It is equipped with an igni ...
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A.O. Smith FPSH - 75 - page 14
14 TEMPERA TURE REGULA TION CAUTION THIS WA TER HEA TER IS EQUIPPED WITH AN ADJUST ABLE THERMOST A T TO CONTROL WA TER TEMPERA TURE. HOT W A TER TEMPERA TURES REQUIRED FOR AU T OMA TIC DISHW ASHER AND LAUNDRY USE CAN CAUSE P AINFUL SCALDING WITH POSSIBLE SERIOUS AND PERMANENT INJURY . THE TEMPERA TURE A T WHICH INJURY OCCURS V ARIES WITH THE PERSON ...
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A.O. Smith FPSH - 75 - page 15
15 SERVICE SHOULD BE PERFORMED ONL Y BY A QUALIFIED SERVICE TECHNICIAN. READ THE GENERAL SAFETY INFORMA TION SECTION FIRST . USERS OF THIS APPLIANCE SHOULD BE A W ARE THA T GA S COMPONENTS WEAR OUT OVER A PERIOD OF TIME. THE GAS CARRYING COMPONENTS OF THIS APPLIANCE SHOULD BE INSPECTED FOR PROPER OPERA TION PERIODICALL Y BY A QUALIFIED SERVICE TECH ...
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A.O. Smith FPSH - 75 - page 16
16 If the heater is to be shut off and exposed to freezing temperatures, it must be drained. Water , if left in the tank and allowed to freeze, will damage the heater . • T urn off the gas and cold water inlet valve to the heater. • Open a nearby hot water faucet and the heater drain valve. • BE CAREFUL T O GRASP THE DRAIN V AL VE HANDLE SO T ...
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A.O. Smith FPSH - 75 - page 17
17 TROUBLESHOOTING For your safety , water heater service should be performed only by a qualified service technician. Read the GENERAL SAFETY INFORMA TION section first. W ARNING: DO NOT BY -P ASS ANY CONTROLS T O MAKE HEA TER OPERA TE. OPERA TE ONL Y AS WIRED FROM F ACTO R Y . 1 ) Blower will not run A ) “ON/OFF” control switch turned off B) B ...
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A.O. Smith FPSH - 75 - page 18
18 W A TER HEA TER CONTROL PROBLEM SOLUTION An open earth ground circuit to the 1. Check that the earth ground connection is ignition system. properly connected. 2. Check that the ground conductor on the water heater is properly connected. Wiring error or a high resistance to 1. Check for proper connection of line earth ground. neutral and hot wire ...
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A.O. Smith FPSH - 75 - page 19
19 LIMITED RESIDENTIAL GAS W ARRANTY b. Shipping and delivery charges for forwarding the new water heater or replacement part from the nearest distributor and returning the claimed defective heater or part to such distributor except in the state of California where such charges are the manufacturer’s responsibility . c . All cost necessary or inc ...
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A.O. Smith FPSH - 75 - page 20
20 A.O. SMITH WATER PRODUCTS CO., INC. 5621 W. 115TH STREET • ALSIP, ILLINOIS 60803 PHONE: 1-800-433-2545 • FAX: 1-800-433-2515 www.hotwater.com • E-MAIL: parts@hotwater.com ...
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