MODELS JWSM & AJWSM COMMERCIAL GAS, GLASS-LINED, TANK-TYPE WATER HEATER • INSTALLATION • OPERATION • MAINTENANCE • LIMITED WARRANTY NSF 5 Thank you for buying this energy efficient water heater from GSW Water Heating. We appreciate your confidence in our product. CAUTION TE X T P R IN TE D OR OU TLIN E D IN R E D CO NTAI NS INFORMATION RELATIVE TO YOUR SAFETY. PLEASE READ THOROUGHLY BEFORE INSTALLING AND USING THIS APPLIANCE.
ROUGH-IN-DIMENSIONS See Models Below FIGURE 1 JWSM71120 THROUGH (A) JWSM100390 - TABLE 1A CONNECTIONS INLET OUTLET Approximate ship. Weight INPUT RATE BTU/Hr. APPROX TANK CAP. A B C STD. ASME JWSM71120 120,000 BTU/Hr. 35 Kw/Hr 71 Gal 268 L 69.75” 177cm 4.25” 11cm 59.50” 151cm 50.87” 19.69” 19” 48 1/2” 51.88” 6” 27.75” 1.50” 129cm 50cm cm 1/2” 132cm 15cm 71 cm 1.50” 1.50” 1.50” 1.50” 1.50” 1.50” 1.50” 1.50” 1.50” .50” .
TABLE OF CONTENTS Page Page ROUGH-IN-DIMENSIONS..................................................2-3 TABLE OF CONTENTS..........................................................4 FOREWORD..........................................................................4 GENERAL SAFETY INFORMATION......................................5 Chemical Vapor Corrosion......................................................5 Improper Combustion.............................................................
GENERAL SAFETY INFORMATION LIQUID PETROLEUM MODELS Water heaters for propane or liquefied petroleum gas (LPG) are different from natural gas models. A natural gas heater will not function safely on LP gas and no attempt should be made to convert a heater from natural gas to LP gas. PRECAUTIONS LP gas must be used with great caution. It is highly explosive and heavier than air. It collects first in the low areas making its odor difficult to detect at nose level.
Upon completion of derating of the heater, adjustment to the gas pressure regulator may be required. See CHECKING THE INPUT section in this manual for inlet and manifold pressure requirements. • Do not cover the instruction manual. Keep it on the side of the water heater or nearby for future reference. • Do not allow insulation to come within 2” (5 cm) of the burners, to prevent blockage of combustion air flow to the burners.
Continued manual resetting of high limit control, preceded by higher than usual water temperature is evidence of high limit switch operation. The following is a possible reason for high limit switch operation: • Each automatic flue damper drive assembly is equipped with a “Service Switch”, as shown in figure 5. A malfunction in the thermostatic controls would allow the gas valve to remain open causing water temperature to exceed the thermostat setting.
The National Sanitation Foundation also recommends circulation of 180°F (82°C) water. Where this is done, the circulation should be very gentle so that it does not cause any unnecessary turbulence inside the water heater. The circulation should be just enough to provide 180°F (82°C) water at the point of take-off to the dishwashing machine. Adjust flow by means of the plug cock in the circulating line. NEVER BE PLACED ON OR ADJACENT TO THE HEATER.
ILLUSTRATION OF MINIMUM COMBUSTIBLE CLEARANCES IN AN ALCOVE FIGURE 6 A B (RIGHT SIDE) (LEFT SIDE) C (BACK) D (CEILING) JWSM71120 1” (2.54 cm) 1” (2.54 cm) 1” (2.54 cm) 12” (30.48 cm) JWSM81154 2” (5.08 cm) 2” (5.08 cm) 2” (5.08 cm) 12” (30.48 cm) JWSM95199 1” (2.54 cm) 1” (2.54 cm) 1” (2.54 cm) 12” (30.48 cm) JWSM76199 2” (5.08 cm) 2” (5.08 cm) 2” (5.08 cm) 12” (30.48 cm) WARNING KEEP APPLIANCE AREA CLEAR AND FREE OF COMBUSTIBLE MATERIALS, GASOLINE AND OTHER FLAMMABLES, VAPORS AND LIQUIDS.
CONFINED SPACE many local building codes as is the practice of venting gas fired equipment to the duct work of ventilation systems. 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 IN OR WITHIN 12 INCHES (30.5cm) OF THE ENCLOSURE TOP AND ONE IN OR WITHIN 12 INCHES (30.5cm) OF THE ENCLOSURE BOTTOM.
TECHNICAL DATA VENTING, TABLE 3 TYPE B GAS VENT Multiple Gas Fired Tank-Type Heaters When venting mutiple tank type heaters using Type B vent pipe, follow the installation diagram (figure 8) and tables below which give sizing and data based upon NFPA 54/ANSI Z223. MODEL JWSM71120 Input: 120,000 Btuh Total Vent Height (Feet) Draft Hood: 5” 6 Input Btuh Number of Heaters 2 3 4 8 Rise 10 15 20 30 50 100 Vent Connector Diameter (inches) 120,000 1 Ft. 7 7 7 6 6 6 6 6 120,000 2 Ft.
TECHNICAL DATA VENTING, TABLE 3 (Continued) MODEL (A)JWSM65251 Input: 251,000 Btuh Draft Hood: 6” Number of Heaters Input Btuh 251,000 251,000 251,000 Combined Input in Thousands of Btuh 2 3 4 502 753 1004 Rise 1 Ft. 3 Ft. 14 14 18 6 Input Btuh 275,000 275,000 Combined Input in Thousands of Btuh 550 825 1100 Number of Heaters Input Btuh 315,000 305,000 365,000 Combined Input in Thousands of Btuh 2 3 4 610 915 1220 Rise 2 Ft. 3 Ft.
If a water heater is installed in a closed water system, contact the water supplier or local plumbing inspector on how to control this situation. installed with a properly sized, rated and approved combination temperature (ANSI) and pressure (ASME) relief valve(s). WATER (POTABLE) HEATING AND SPACE HEATING 1. All piping components connected to this unit for space heating applications shall be suitable for use with potable water.
INCH GAGE- 3.5 kPa) SUPPLY GAS PRESSURE. EXPOSURE TO HIGHER SUPPLY PRESSURE MAY CAUSE DAMAGE TO THE GAS VALVE WHICH COULD RESULT IN FIRE OR EXPLOSION. IF OVERPRESSURE HAS OCCURRED SUCH AS THROUGH IMPROPER TESTING OF GAS LINES OR EMERGENCY MALFUNCTION OF THE SUPPLY SYSTEM, THE GAS VALVE MUST BE CHECKED FOR SAFE OPERATION. MAKE SURE THAT THE OUTSIDE VENTS ON THE SUPPLY REGULATORS AND THE SAFETY VENT VALVES ARE PROTECTED AGAINST BLOCKAGE. THESE ARE PARTS OF THE GAS SUPPLY SYSTEM, NOT THE HEATER.
The minimum gas supply pressure for input adjustment must not be less than 4.5” w.c. (1.12 kPa) for natural gas and 11.0” w.c. (2.74 kPa) for propane gas. BEFORE PLACING THE HEATER IN OPERATION, CHECK FOR GAS LEAKAGE. Use soap and water solution or other material acceptable for the purpose in locating the leaks. DO NOT USE MATCHES, CANDLES, FLAME OR OTHER SOURCES OF IGNITION FOR THIS PURPOSE. Do not subject the combination gas valve to inlet gas pressures of more than 14.0” W.C. (3.
VERTICAL STORAGE TANK AND FORCED CIRCULATION DANGER TEMPERATURE SETTING SHOULD NOT EXCEED SAFE USE TEMPERATURE AT FIXTURES. SEE WATER TEMPERATURE CONTROL WARNING ON PAGE 25. IF HIGHER PREHEAT TEMPERATURES ARE NECESSARY TO OBTAIN ADEQUATE BOOSTER OUTPUT, ADD AN ANTI-SCALD VALVE FOR HOT WATER SUPPLIED TO FIXTURES. HORIZONTAL STORAGE TANK AND FORCED CIRCULATION CREATED BY NEEVIA DOCUSTAMP TRIAL VERSION (WWW.NEEVIA.
TWO TEMPERATURE - ONE HEATER HIGH TEMPERATURE STORAGE WITH RECIRCULATION OF SANITIZING LOOP DANGER TEMPERATURE SETTING SHOULD NOT EXCEED SAFE USE TEMPERATURE AT FIXTURES. SEE WATER TEMPERATURE CONTROL WARNING ON PAGE 25. IF HIGHER PREHEAT TEMPERATURES ARE NECESSARY TO OBTAIN ADEQUATE BOOSTER OUTPUT, ADD AN ANTI-SCALD VALVE FOR HOT WATER SUPPLIED TO FIXTURES. NOTE 1: TOGGLE SWITCH CONTROLS 180°F (82°C) WATER CIRCULATION. INSTALL ON OR CLOSE TO DISHWASHING MACHINE.
INSTALLATION DIAGRAMS-SIDE INLET/OUTLET USAGE A listed temperature and pressure relief valve of adequate capacity is installed on the heater. The locations shown in the installation diagrams on the following pages are typical. The discharge opening of the temperature and pressure relief valve must be piped to an open drain and should not be subject to freezing conditions. DO NOT REDUCE, BLOCK OR PLUG THE DISCHARGE OPENING OF THE VALVE.
ONE OR TWO TEMPERATURE - ONE HEATERS,HIGH TEMPERATURE STORAGE WITH OR WITHOUT RECIRCULATION HEATER WITH OR WITHOUT MIXING VALVE DANGER TEMPERATURE SETTING SHOULD NOT EXCEED SAFE USE TEMPERATURE AT FIXTURES. SEE WATER TEMPERATURE CONTROL WARNING ON PAGE 25. IF HIGHER PREHEAT TEMPERATURES ARE NECESSARY TO OBTAIN ADEQUATE BOOSTER OUTPUT, ADD AN ANTI-SCALD VALVE FOR HOT WATER SUPPLIED TO FIXTURES. INSERT A HEATER WITH MIXING VALVE AND RECIRCULATED SANITIZING LOOP NOTE 1: * PIPE RELIEF VALVE TO OPEN DRAIN.
TWO TEMPERATURE - TWO PRE-HEATERS WITH MIXING VALVE OR BOOSTER HEATER WITH OR WITHOUT BUILDING RECIRCULATION TWO PRE-HEATERS WITH MIXING VALVE DANGER TEMPERATURE SETTING SHOULD NOT EXCEED SAFE USE TEMPERATURE AT FIXTURES. SEE WATER TEMPERATURE CONTROL WARNING ON PAGE 25. IF HIGHER PREHEAT TEMPERATURES ARE NECESSARY TO OBTAIN ADEQUATE BOOSTER OUTPUT, ADD AN ANTI-SCALD VALVE FOR HOT WATER SUPPLIED TO FIXTURES. INSERT A TWO PRE-HEATERS WITH BOOSTER HEATER CREATED BY NEEVIA DOCUSTAMP TRIAL VERSION (WWW.
MEDIUM TEMPERATURE - ONE HEATER WITH AUXILIARY STORAGE TANK FORCED CIRCULATION WITH OR WITHOUT BUILDING RECIRCULATION VERTICAL STORAGE TANK * PIPE RELIEF VALVE TO OPEN DRAIN. ** WHEN USING AN A.O. SMITH T-140 -200, -350 OR -400 STORAGE TANK, USE LOWER 3/4” OPENING FOR TANK TEMPERATURE CONTROL. IF BUILDING CIRCULATING LOOP IS USED, CONNECT TO AN OPENING NEAR THE BOTTOM OF THE TANK.
TABLE 5 MANIFOLD GAS PRESSURE IN INCHES OF WATER COLUMN (ALL MODELS*) TYPE OF GAS NATURAL PROPANE 3.5 10.0 Gas pressure specified in Table 5, refer to flow pressure taken at pressure tap of automatic gas valve while heater is operating. TABLE 6 APPROXIMATE TIME REQUIRED TO CONSUME 1 CU. FT. OF GAS AT FULL CAPACITY INPUT RATE (BTUH) TYPE OF GAS BTUH PER CU. FT. TIME REQ’D TO CONSUME 1 CU. FT. OF GAS 120,000 NATURAL PROPANE 1050 2500 31. 5 SEC. 75.0 SEC. 154,000 NATURAL PROPANE 1050 2500 24.
OPERATION PURGING Gas line purging is required with new piping or systems in which air has entered. IMPORTANT A qualified person must perform the initial firing of the heater. At this time the user should not hesitate to ask the individual any questions which they may have in regard to the operation and maintenance of the unit. CAUTION PURGING SHOULD BE PERFORMED BY PERSONS EXPERIENCED IN THIS TYPE GAS SERVICE.
FOR NATURAL GAS MODELS FOR YOUR SAFETY READ BEFORE OPERATING OPERATING INSTRUCTIONS FOR YOUR SAFETY READ BEFORE OPERATING CREATED BY NEEVIA DOCUSTAMP TRIAL VERSION (WWW.NEEVIA.
FOR PROPANE GAS MODELS FOR YOUR SAFETY READ BEFORE OPERATING OPERATING INSTRUCTIONS TO TURN OFF GAS TO APPLIANCE CREATED BY NEEVIA DOCUSTAMP TRIAL VERSION (WWW.NEEVIA.
ADJUSTMENTS that attach to faucets to limit hot water temperatures. Contact a licensed plumber or the local plumbing authority. ON INITIAL STARTUP SOME ADJUSTMENTS ARE NECESSARY. The water temperature is controlled by a thermostat, Fig. 3, which has two sensing elements. One sensor is located near the top of the tank and the other is near the center. The thermostat is set in the lowest position before the heater leaves the factory. 1. CHECK MANIFOLD AND INLET GAS PRESSURES. 2.
• The pilot flame should envelop sensing device with 5/8” (1.6cm) flame, fig. 16. Remove pilot adjustment cover screw, fig. 17. Turn inner adjustment screw clockwise to decrease, or counterclockwise to increase pilot flame. Be sure to replace cover screw on gas valve after adjustment to prevent possible gas leakage. 2. Inspect the venting system for proper size and horizontal pitch, as required in the National Fuel Gas Code, ANSI Z223.1 CSA B.149 and these instructions.
TYPICAL PILOT AND MAIN BURNER FLAMES If the gas valve becomes defective, repairs should not be attempted. A new valve should be installed in place of the defective one. CHECKING THE INPUT For appliance installation locations with elevations above 2000 feet (610 m), refer to HIGH ALTITUDE INSTALLATIONS section of this manual for input reduction procedure.
VENTING SYSTEM the factory installed magnesium anodes with aluminum anodes may correct the condition. Examine the venting system every six months for obstructions and/or deterioration of the vent piping. Occasionally water softener companies recommend removal of heater anodes for odor reasons. Remove all soot or other obstructions from chimney which will retard free draft. CAUTION Unauthorized removal of the anode(s) will void the warranty. For further information contact your dealer.
TROUBLESHOOTING IGNITION MODULE SYSTEM cleanout. UN•LIME® and the booklet may be obtained through your John Wood dealer or distributor. Before calling your service agent, the following checklist should be examined to eliminate obvious problems from those requiring replacement or servicing. — Check that “main manual gas shut-off valve” is fully open and that gas service has not been interrupted.
EFFIKAL RVGP-KSF-SERIES FLUE DAMPER TROUBLE SHOOTING GUIDE Do not turn damper open manually or motor damage will result, use the service switch. All readings are taken from harness receptacle. Do not push meter leads into harness receptacle. This opens the pins and will create connection problems. Effikal Pinouts Adapter wire & wire colors Function colors in* 1. Brown 24 VAC HOT Black 2. Orange Signal In Yellow 3. Yellow Signal Out Red 4. Black 24 VAC Common White *See Connection Diagram, Figure 14.
OPERATIONAL CHECKLIST This checklist in conjunction with “TROUBLESHOOTING” and the “SEQUENCE OF OPERATION” should be used as an on-the-job troubleshooting guide to identify the cause of incorrect system operation and suggest a remedy for its correction. Because improper piping and wiring can result in unsatisfactory system performance, it is suggested that the installation by examined before using the checklist.
Model JWSM & AJWSM Limited Warranty GSW Water Heating, the warrantor, extends the following LIMITED WARRANTY to the original owner of this water heater: 1. THE TANK If the glass-lined tank in this water heater shall prove upon examination by the warrantor to have leaked due to natural corrosion from potable water therein, during the first THREE years after initial installation, the warrantor will supply a complete new water heater of equivalent size and current model.
NOTES CREATED BY NEEVIA DOCUSTAMP TRIAL VERSION (WWW.NEEVIA.
CREATED BY NEEVIA 599 Hill Street West Fergus, ON Canada N1M 2X1 Should you have any questions please DOCUSTAMP TRIAL VERSION Email us at techsupport@gsw-wh.com or Visit our websites: www.gsw-wh.com or www.johnwoodwaterheaters.com or Call our Technical Support line at 1-888-GSW-TECH (479-8324) 34 (WWW.NEEVIA.
