John Wood (A)JWSH100150 Instruction Manual Download Page 11

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STORAGE CAPACITIES
TABLE 2

MODEL

U. S. GALLONS

LITERS

(A)JWSH100150

100

379

(A)JWSH100199

100

379

(A)JWSH100250

100

379

GAS LINE CONNECTION SIZE
TABLE 1

† MODEL

SERIES

NATURAL GAS

PROPANE GAS

(A)JWSH100150

200/201

3/4 "NPT

(A)JWSH100199

200/201

3/4 "NPT

(A)JWSH100250

200/201

3/4 "NPT

† Depending on the installed equivalent length, and/or the number of appliances connected, the

supply gas line size may have to be increased beyond the minimum required sizes - see Gas

Line Sizing on page 39.

8. Locate the water heater where an adequate supply of fresh

air for combustion and ventilation can be obtained. See Air

Requirements on page 17.

9. Locate the water heater where the vent and intake air piping,

when installed, will remain within the maximum equivalent

lengths allowed. See Venting Requirements on page 21.

10. Do not locate the water heater where noise (such as

the Combustion Blower) during normal operation will be

objectionable in adjacent areas.

11. Do not locate the water heater where the subsequent

installation of the vent (exhaust) or intake air terminations

would be objectionable due to noise at the termination(s).

This includes locations close to or across from windows and

doors. See Venting Installation on page 20.

Fire or Explosion Hazard

Read instruction manual before

installing, using or servicing

water heater.

Avoid all ignition sources if you smell gas.

Do not store or use gasoline or other flammable vapors and

liquids in the vicinity of this or any other appliance.

Use only the gas shown on the water heater rating label.

Keep ignition sources away from faucets after extended

periods of non-use.

Maintain required clearances to combustibles.

Do not expose water heater controls to excessive gas

pressure.

LOCATING THE WATER HEATER

Carefully choose a location for the new water heater. The

placement is a very important consideration for the safety of the

occupants in the building and for the most economical use of the

water heater.

Property Damage Hazard

All water heaters eventually leak.

•

Do not install without adequate drainage.

•

CAUTION

Whether replacing an existing water heater or installing the water

heater in a new location observe the following critical points:
1. The water heater must be located indoors.
2. The water heater must not be located in an area where it will

be subject to freezing temperatures.

3. Locate the water heater so it is protected and not subject to

physical damage by a moving vehicle.

4. Locate the water heater on a level surface.
5. Locate the water heater near a floor drain. The water heater should

be located in an area where leakage of the tank or connections

will not result in damage to the area adjacent to the water heater

or to lower floors of the structure. When such locations cannot be

avoided, it is recommended that a metal drain pan, adequately

drained, be installed under the water heater.

6. Locate the water heater close to the point of major hot water usage.
7. Locate the water heater close to a 120 VAC power supply.

See Power Supply on page 13 for requirements.

GAS PRESSURE REQUIREMENTS
TABLE 3

MODEL

MANIFOLD PRESSURE

MINIMUM SUPPLY PRESSURE

MAXIMUM SUPPLY PRESSURE

NATURAL GAS

PROPANE GAS

NATURAL GAS

PROPANE GAS

NATURAL GAS

PROPANE GAS

(A)JWSH100150

0" W.C. (0 kPa)

4.4” W. C. (1.10 kPa)

8.5” W. C. (2.12 kPa)

14” W. C. (3.49 kPa)

(A)JWSH100199

0” W. C. (0 kPa)

4.4” W. C. (1.10 kPa)

8.5” W. C. (2.12 kPa)

14” W. C. (3.49 kPa

14” W. C. (3.49 kPa)

(A)JWSH100250

0” W. C. (0 kPa)

4.4” W. C. (1.10 kPa)

8.5” W. C. (2.12 kPa)

14” W. C. (3.49 kPa)

RECOVERY CAPACITIES
TABLE 4

U. S. GALLONS/HR & LITERS/HR AT TEMPERATURE RISE INDICATED

Model

Type of

Gas

Input

Thermal

Efficiency%

°F

30°F

40°F

50°F

60°F

70°F

80°F

90°F

100°F

110°F

120°F

130°F

140°F

Btu/hr

°C

17°C

22°C

28°C

33°C

39°C

44°C

50°C

56°C

61°C

67°C

72°C

78°C

(A)JWSH100150

Natural

150,000

GPH

594

445

356

297

255

223

198

178

162

148

137

127

Propane

LPH

2248

1686

1349

1124

963

843

749

674

613

562

519

482

(A)JWSH100199

Natural

199,900

GPH

783

588

470

392

336

294

261

235

214

196

181

168

Propane

LPH

2965

2224

1779

1483

1271

1112

988

890

809

741

684

635

(A)JWSH100250

Natural

250,000

GPH

970

727

582

485

416

364

323

291

264

242

224

208

Propane

LPH

3670

2753

2202

1835

1573

1376

1223

1101

1001

918

847

786

Summary of Contents for (A)JWSH100150

Page 1: ...TION SERVICE MAINTENANCE LIMITED WARRANTY CANADIAN MANUAL WARNING If the information in these instructions is not followed exactly a fire or explosion may result causing property damage personal injury or death 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 ...

Page 2: ... Pump Wiring Diagrams 67 Water Piping Diagrams 68 NOTES 75 SERVICE INQUIRIES 79 LIMITED WARRANTY 79 TABLE OF CONTENTS SAFE INSTALLATION USE AND SERVICE 3 APPROVALS 3 GENERAL SAFETY INFORMATION 4 Precautions 4 Grounding Instructions 4 Hydrogen Gas Flammable 4 INTRODUCTION 6 Abbreviations Used 6 Qualifications 6 Preparing For The Installation 6 FEATURES AND COMPONENTS 7 Basic Operation 7 Modulation ...

Page 3: ...defects or other reproductive harm and requires businesses to warn of potential exposure to such substances This product contains a chemical known to the State of California to cause cancer birth defects or other reproductive harm This water heater can cause low level exposure to some of the substances listed in the Act DANGER WARNING CAUTION CAUTION DANGER indicates an imminently hazardous situat...

Page 4: ...drogen 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 FAUCETAT THE TIME IT IS OPEN GENERAL SAFETY INFORMATION Read and understand this instruction manual and the safety messages herein before installing operating or servicing this water heater Failure to follow these instructions...

Page 5: ...ore placing water heater in operation Disconnect gas piping at main gas shutoff valve before leak testing heater Install sediment trap in accordance with NFPA 54 or CAN CSA B149 1 Use joint compound or Teflon tape compatible with propane gas Fire and Explosion Hazard Turn off gas lines during installation Contact a qualified installer or service agency for installation and service Excessive gas pr...

Page 6: ...al These diagrams will serve to provide the installer with a reference It is essential that all venting water piping gas piping and wiring be installed as shown Particular attention should be given to the installation of thermometers at the locations indicated in the piping diagrams as these are necessary for checking the operation of the water heater The principal components of the water heater a...

Page 7: ...rious other temperature limitations Periodically when the heater is in modulation mode the CCB will increase the blower speed for a short period of time to clear out any condensation that has accumulated in the heat exchanger then decreases the blower speed back to the modulating firing rate required to maintain the desired tank temperature setpoint This ramping up and down of the blower speed is ...

Page 8: ...5 7 4 3 10 5 1 17 8 9 11 FRONT TOP VIEW OF ALL MODELS COMPONENTS All Models IMPORTANT The Enable Disable switch listed in this manual is NOT an on off switch and does not disconnect 120 volt power to the CCB and other heater components 1 Water Heater s Enable Disable Switch When in the Disabled position the switch removes electrical power from the gas valve and blower so that water heating is disa...

Page 9: ...sate Elbow 3 Aluminum 16 Spark Ignition Control When energized sends the electrical current to the spark igniter SIDE VIEWS 1 Cleanout access panel covers water heater cleanout opening 2 CCB enclosure see item 3 on page 8 for description 3 Intake air connection 3 inch PVC 4 Water heater 24 Volt Gas Valve 5 Combustion Blower 6 Water outlet 1 1 2 NPT connection 7 UIM user interface module The UIM in...

Page 10: ... 70 177 8 18 25 46 36 523 237 553 251 Figure 5 These designs comply with the current edition of the American National Standard for Gas Water Heaters Volume III ANSI Z21 10 3 CSA 4 3 as an automatic circulating tank water heater and automatic storage water heaters ALL MODELS Center line of water outlet on top of the water heaters is approximately 7 inches from the front edge of the water heater TOP...

Page 11: ... leak Do not install without adequate drainage CAUTION Whether replacing an existing water heater or installing the water heater in a new location observe the following critical points 1 The water heater must be located indoors 2 The water heater must not be located in an area where it will be subject to freezing temperatures 3 Locate the water heater so it is protected and not subject to physical...

Page 12: ...e air or vent pipe is installed factory supplied 4 inch terminations must be used Contact your local distributor or call the parts department phone number listed on the back cover of this manual to order 4 inch termination s OPTIONAL CONCENTRIC LOW PROFILE TERMINATIONS The water heaters covered in this manual can be installed in a Direct Vent configuration using optional concentric or Low Profile ...

Page 13: ...er listed on the back cover of this manual for more information NOTE Malfunctions caused by the power supply and costs to install power supply filters are not covered under the limited warranty GAS SUPPLY SYSTEMS Low pressure building gas supply systems are defined as those systems that cannot under any circumstances exceed 14 W C 1 2 PSI Gauge These systems do not require pressure regulation Meas...

Page 14: ...the elderly and the physically or mentally disabled are at highest risk for scald injury Feel water before bathing or showering Temperature limiting devices such as mixing valves must be installed when required by codes and to ensure safe temperatures at fixtures Water heated to a temperature which will satisfy clothes washing dish washing and other sanitizing needs can scald and cause permanent i...

Page 15: ...ized temperature pressure relief valve must be installed in opening provided Can result in overheating and excessive tank pressure Can cause serious injury or death This water heater is provided with a properly rated sized and certified combination Temperature Pressure Relief Valve T P valve by the manufacturer The valve is certified by a nationally recognized testing laboratory that maintains per...

Page 16: ...d by local codes NOTE Lower PH levels are acidic Do not connect a metal drain line such as copper to the water heater for this reason See Condensate Drain Installation on page 38 COMBUSTIBLE MATERIAL STORAGE Fire or Explosion Hazard Read instruction manual before installing using or servicing water heater Avoid all ignition sources if you smell gas Do not store or use gasoline or other flammable v...

Page 17: ...area through a design of louver or grille or screen is known it shall be used in calculating the size of opening required to provide the free area specified Where the louver and grille design and free area are not known it shall be assumed that wood louvers will have 25 free area and metal louvers and grilles will have 75 free area Non motorized louvers and grilles shall be fixed in the open posit...

Page 18: ...ggregate input rating of all appliances installed in the enclosure When ducts are used they shall be of the same cross sectional area as the free area of the openings to which they connect The minimum dimension of rectangular air ducts shall be not less than 3 inches FRESH AIR OPENINGS FOR CONFINED SPACES The following instructions shall be used to calculate the size number and placement of openin...

Page 19: ...f the aggregate input rating of all appliances installed in the enclosure Each opening shall not be less than 100 square inches 645 cm2 OUTDOOR AIR THROUGH TWO VERTICAL DUCTS The illustrations shown in this section of the manual are a reference for the openings that provide fresh air into confined spaces only DO NOT refer to these illustrations for the purpose of vent installation See Venting Inst...

Page 20: ...nd icing of the combustion air intake during severe cold weather To prevent the recirculation of flue gases maintain as much distance as possible between the intake air and vent terminations 16 Do not locate the vent termination over a public area where condensate or vapor can cause a nuisance or ice hazard 17 Ensure the screens in the factory supplied terminations are securely installed to preven...

Page 21: ...ll field supplied installed fittings and piping must be factored into the equivalent feet calculations 90 elbows short or long radius are equivalent to 5 linear feet 152 cm of pipe 45 elbows short or long radius are equivalent to 2 5 linear feet 76 cm of pipe 18 Stress levels in pipe fittings can be significantly increased by improper installation If rigid pipe clamps are used to hold the pipe in ...

Page 22: ...equivalent linear pipe length of AL29 4C 45 and 90 elbows PRIMER AND CEMENT Tetrahydrofuran THF primer should be used to prepare the surfaces of pipe and fittings for solvent welding If CPVC or ABS pipe and fittings are used then the proper cement must be used for all joints including joining the pipe to the factory provided terminations PVC material PVC Materials should use ASTM D 2564 Grade Ceme...

Page 23: ...s installed the screen will be hidden from view and may become clogged with debris over time This will cause improper combustion and may also lead to Blocked Intake Air fault conditions and associated control system lock outs If the vent piping will terminate vertically through a roof see Vertical Termination Installation on page 24 If the vent piping will terminate horizontally through a sidewall...

Page 24: ...center line as shown in Figure 24 on page 25 In colder climates this separation should be increased to at least 48 inches 122 cm The bottom edge of the intake air and vent terminations must be a minimum of 12 inches 30 cm 18 inches 45 cm in Canada above the average or expected snow level as shown in Figure 22 and Figure 24 on page 25 6 When the intake air and or vent piping from multiple water hea...

Page 25: ...ORY SUPPLIED TERMINATIONS INTAKE AIR AND VENT EXHAUST TERMINATIONS 45 ELBOW WITH RECESSED DEBRIS SCREEN Figure 21 2 5 cm MAXIMUM FACTORY SUPPLIED STANDARD TERMINATION POINTED DOWN TOWARDS THE GROUND VERTICAL TERMINATION S INSTALLATION INTAKE AIR AND OR VENT EXHAUST FIELD SUPPLIED 90 ELBOW FIELD SUPPLIED STRAP SUPPORT FIELD SUPPLIED PLUMBING ROOF BOOT OR FLASHING MAINTAIN 12 30 cm 18 45 cm FOR CANA...

Page 26: ...13 cm diameter hole for 4 inch pipe where the pipe s will pass through the wall NOTE Beware of concealed wiring and piping when cutting through the wall 19 Cut a length s of pipe being installed 3 5 inches 8 9 cm to 9 5 inches 24 1 cm longer than the wall thickness at the opening See Figure 26 NOTE Vent Termination exhaust gases of this water heater are less than 140 F In cold climates water vapor...

Page 27: ...t can be used Insulation should not be used on Polypropylene venting materials The use of insulation will cause increased vent wall temperatures which could result in vent pipe failure Use only the adapters and vent system listed in Tables below DO NOT mix vent systems of different types or manufacturers Failure to comply could result in severe personal injury death or substantial property damage ...

Page 28: ...se from smooth walled plastic vents Consult Tables 9 and 10 for the correct equivalent linear vent lengths Listed vent systems composed of AL29 4C must not mix parts from the different manufacturers The joints of these products are sealed by internal gaskets Do not use any other type of sealant When assembling these vent systems follow the vent manufacturer s instructions for cleaning and lubricat...

Page 29: ...gure 28 on page 30 for the minimum lengths allowed for the 4 inch concentric termination Use only SDR 26 pipe to extend the 4 inch concentric termination NOTE When shortening the length of the termination carefully measure and cut the larger intake air pipe first Cut the same amount of pipe off of the smaller vent pipe NOTE Lengthening of the Concentric Vent Termination is not permitted 10 Proceed...

Page 30: ...eld supplied stainless steel screw may be used to secure the 2 components together when field disassembly is desired for cleaning A pilot hole must be drilled for the screw to prevent damage cracking of the vent cap and or vent pipe 7 Install the vent cap vent pipe assembly into the intake air Y fitting assembly Ensure small diameter vent pipe is cemented and bottomed in the Y fitting 8 When insta...

Page 31: ...ations are maintained Ensure multiple terminations are arranged or grouped as required NOTE These clearances must be maintained to prevent the recirculation of vent exhaust gases to the intake air Clearances are measured between the edges of the concentric termination caps When installing multiple concentric terminations through a roof or through a sidewall the clearances shown in Figure 31 must b...

Page 32: ...Clearances on page 31 for detailed information on clearances and additional arrangement options NOTE When multiple concentric terminations are installed through a roof in the same location all termination caps must be at the same height measured from the ground Two Concentric Terminations Two concentric terminations may be installed in close proximity as shown in Figure 36 or with standard clearan...

Page 33: ...Installation Guide which is available on the web www ipexinc com 3 To fasten the Base to the wall use the supplied screws and anchors A 3 16 5mm hole 1 3 16 30mm deep will need to be drilled for the anchors Locate the anchor hole using the base as a template 4 Screw the Cap to the Base using the supplied screws 5 Once the vent termination and pipes are secured the wall penetrations will need to be...

Page 34: ...r Vent Vertical Figure 42 Direct Vent Vertical Figure 44 Power Vent Horizontal Figure 43 Direct Vent Horizontal Figure 45 Direct Vent Vertical Vent Horizontal Intake Figure 46 Direct Vent Horizontal Vent Vertical Intake Figure 47 ...

Page 35: ...35 VENTING ARRANGEMENTS Direct Vent Vertical Concentric Figure 48 Direct Vent Horizontal Concentric Figure 49 Direct Vent Horizontal Low Profile Figure 50 ...

Page 36: ... other appliance 6 inches 15 cm for appliances up to 10 000 Btu hr 3 kW 12 inches 30 cm for appliances between 10 000 Btu hr 3 kW and 100 000 Btu hr 30kW 36 inches 91cm for appliances above 100 000 Btu hr 30 kW 4 feet 1 2 m below or to side of opening 1 foot 30 cm above opening D Vertical clearance to ventilated soffit located above the terminal within a horizontal distance of 2 feet 61 cm from th...

Page 37: ...any other appliance 6 inches 15 cm for appliances up to 10 000 Btu hr 3 kW 12 inches 30 cm for appliances between 10 000 Btu hr 3 kW and 100 000 Btu hr 30 kW 36 inches 91 cm for appliances above 100 000 Btu hr 30 kW 6 inches 15 cm for appliances up to 10 000 Btu hr 3 kW 9 inches 23 cm for appliances between 10 000 Btu hr 3 kW and 50 000 Btu hr 15 kW 12 inches 30 cm for appliances above 50 000 Btu ...

Page 38: ...n 1 2 inch PVC fittings elbows couplings and adapters necessary to install a condensate drain line between the Exhaust Condensate Elbow Assembly and a suitable building drain Floor mounted standoffs to brace the drain line INSTALLATION NOTES 1 The condensate drains from the water heater s covered by this instruction have PH levels between 4 3 and 5 0 Install a commercially available neutralizing k...

Page 39: ... CAP SEDIMENT TRAP Figure 54 Ensure all gas pipe is clean on the inside before installation To trap any dirt or foreign material in the gas supply line a sediment trap must be installed as shown in Figure 54 The sediment trap must be readily accessible and not subject to freezing conditions Install in accordance with the recommendations of the local gas utility company GAS LINE SIZING Depending on...

Page 40: ...ply gas line as shown in Figure 54 on page 39 NOTE Should overheating occur or the gas supply fail to shut off turn off the Main Gas Shutoff valve to the water heater GAS LINE LEAK TESTING Fire and Explosion Hazard Leak test gas connections before placing water heater in operation Disconnect gas piping at main gas shutoff valve before leak testing heater Install sediment trap in accordance with NF...

Page 41: ...pears over the thermometer icon on the UIM when water heating operation is disabled See the Status Icons descriptions in Table 14 on page 46 NOTE Ensure the water heater is protected from freezing temperatures when water heating operation is disabled Damage to the water heater caused by freezing temperatures is not covered under the limited warranty POWER SUPPLY CONNECTIONS Read the requirements f...

Page 42: ...g Machines on page 14 3 Temperature Pressure Relief Valve on page 15 4 Closed Systems and Thermal Expansion on page 14 5 For multiple water heater installations see Water Piping Diagrams beginning on page 68 WATER PIPING DIAGRAMS This manual provides detailed water piping diagrams for typical methods of application for the water heaters see Water Piping Diagrams beginning 68 The water heater may b...

Page 43: ...S OFF O N MANUFACTURER MODEL INFORMATION Figure 57 HIGH TEMPERATURE LIMIT CONTROL ECO This water heater is equipped with an ECO energy cut out non adjustable high temperature limit switch The ECO is a normally closed switch that opens activates on a rise in temperature The ECO is located inside the Upper Temperature Probe two red wires see pages 8 and 9 for location The ECO switch contacts will op...

Page 44: ...lso displays animated Status Icons to convey operational information see Table 14 on page 45 for descriptions of the Status Icons OVERVIEW The water heaters covered in this manual are equipped with an electronic control system that regulates water temperature inside the storage tank Heating cycles and ignition are managed by the control system The ECO energy cut out flame sensor pressure switches ...

Page 45: ...For Building Management Systems on page 41 The Combustion Blower is being energized The Blower Prover pressure switch contacts have closed The check mark icon is visual confirmation of contact closure See Top View on page 8 for Blower Prover Switch location The Spark Igniter is being energized See Figure 2 on page 7 for Spark Igniter location GAS OFF O N The 24 Volt Gas Valve is being energized Th...

Page 46: ...cycled off and on at the breaker to reset the control system NOTE Cycling power will not reset the control system if the condition that caused the Fault has not been corrected CONTROL SYSTEM MENUS From the Desktop screen pressing the Operational directly below Menu on the LCD will display the Main Menu this is where all control system menus are located The table below describes the control system ...

Page 47: ...ttons to view all control system menus from the Main Menu With Temperatures menu selected highlighted in black in the Main Menu screen press the Operational Button under SELECT to enter the Temperatures menu If the Temperatures menu is not selected use the Up and Down Buttons to select this menu item Temperatures Heater Status Display Settings Heater Information Current Fault SELECT BACK HELP Main...

Page 48: ...erature from the probe and the averaged tank temperature Heating cycles would be activated and deactivated based on the calibrated offset temperature A 5 setting results in 5 hotter water These settings are adjusted in the same way described for Operating Set Point And Differential Adjustment on page 47 Operating Set Point 140 F Differential 8 F Tank Temperature 120 F Upper Temperature 122 F Lower...

Page 49: ...ted count of heating cycles CCB Version Software version for central control board Config CRC Verifies the configuration key matches the CCB programming UIM Version Software version for user interface module Use External Enable Enables Disables the external enable circuit External Enable Status Displays whether or not the external enable circuit has been activated Ignition Trials Displays the numb...

Page 50: ...The newest event will replace the oldest Press the Operational Button under VIEW to view details for each Fault or Alert message stored 1 Blocked Air Intake A7 51 mins ago 2 Blocked Exhaust A8 54 mins ago 3 Low Gas Pressure A6 57 mins ago 4 Blower Prover Failure AC VIEW BACK HELP Fault History FAULT OCCURRENCE DESCRIPTION ACTION DISPLAY Select Fault Occurrence from the Main Menu and press the Oper...

Page 51: ...his menu item Show Contact Information Yes Change Contact Name Change Contact Phone Current Contact Info 000 000 0000 Access Code UPDATE CANCEL Service Contact Information Using the UP and DOWN buttons select highlighted in black the Change Contact Name menu item Press the Operational Button under SELECT to open the Change Contact Name menu Show Contact Information Yes Change Contact Name Change C...

Page 52: ...uges Recommended ranges 14 00 to 14 00 W C 0 3 5 kPa resolution 0 01 W C and 0 35 W C 0 8 7 kPa resolution 0 10 W C NOTE All test equipment must be acclimated to ambient temperature before calibration and use PREPARATION 1 Using the control system menus change the Operating Set Point to the lowest temperature setting see Operating Set Point And Differential Adjustment on page 47 2 Turn the water h...

Page 53: ... l l a c i t a m o t u a h c i h w e c i v e d n o i t i n g i n a r e n r u b d n a h y b r e n r u b e h t t h g i l o t y r t t o n o D e c n a i l p p a e h t d n u o r a l l a l l e m s G N I T A R E P O E R O F E B e s u a c e b r o o l f e h t o t t x e n l l e m s o t e r u s e B s a g r o f a e r a r o o l f e h t n o e l t t e s l l i w d n a r i a n a h t r e i v a e h s i s a g e m o s...

Page 54: ... The manifold pressure is non adjustable The manifold gas pressure is factory set and cannot be field adjusted If the manifold gas pressure readings taken on these models is off by more than 0 3 W C from the listed values in Table 3 on page 11 call the technical support phone number listed on the back cover of this manual for further assistance SUPPLY GAS PRESSURE ADJUSTMENT Fire and Explosion Haz...

Page 55: ...ng Set Point to the lowest temperature setting see Operating Set Point And Differential Adjustment on page 47 2 When the water heater has completed its shut down sequence and enters the standby mode turn the water heater s on off switch to the off position 3 Close Main Gas Shutoff Valve see Figure 54 on page 39 HIGH ALTITUDE INSTALLATIONS Fire and Explosion Hazard Gas and carbon monoxide detectors...

Page 56: ...evices If the tank temperature drops below the Operating Set Point minus the Differential setting the control will automatically return to Step 2 and repeat the operating cycle TROUBLESHOOTING INSTALLATION CHECKLIST The list below represents some of the most critical installation requirements that when overlooked often result in operational problems down time and needless parts replacement This is...

Page 57: ...firmed closed by control system Spark Ignition Control is energized 24 Volt Gas Valve is energized gas flows to Main Burner Is flame sensed at the Main Burner control system monitors the flame sensor Control System Locks Out Displays Fault Msg NO Control System Locks Out Blower Prover Open Fault Msg is displayed NO Combustion Blower is energized Pre Purge cycle Control System performs diagnostic c...

Page 58: ...o meet demand Colder incoming water temperature lengthening the time required to heat water to desired temperature Hot water piping leaks open faucets water heater drain valve leaking or open OPERATIONAL PROBLEMS Read and understand this instruction manual and the safety messages herein before installing operating or servicing this water heater Failure to follow these instructions and safety messa...

Page 59: ... are capable of modulating their firing rate The firing rate is dictated by the hot water draw and various other temperature limitations WATER IS TOO HOT Operating Set Point is set too high See Operating Set Point And Differential Adjustment on page 47 If installed check Thermostatic Mixing Valve settings Upper and or Lower Probe Offset settings improperly set see Temperatures Menu cont on page 48...

Page 60: ...ve minimum pressure requirement listed on heater s data plate before and during operation Ensure wire connections to gas pressure switch are clean and tight If all above conditions are met replace gas pressure switch CHANGE BACK ADVANCED Low Gas Pressure Fault occurred 2 mins ago Gas pressure is below minimum required to operate this unit Check gas pressure and switch Call a service professional Y...

Page 61: ...k pressure switch continuity resistance Switch should be closed continuity 0 ohms Replace switch if open no continuity If Blocked Intake error occurs when blower is running check for restrictions in intake pipe including intake air connection outside termination and inlet condensate drains if installed Other possible causes High wind conditions excessive negative air pressure in building CHANGE BA...

Page 62: ...d let the water run until the water is no longer hot Then close the hot water faucet 4 Connect a hose to the drain valve and terminate it to an adequate drain MAINTENANCE GENERAL Do not have any combustible materials such as gasoline flammable liquids or flammable vapors within the water heater area See Locating The Water Heater on page 11 Water heater maintenance includes periodic tank flushing a...

Page 63: ...eater 6 Open the water heater drain valve to flush the storage tank 7 Flush the water heater storage tank to remove sediment and allow the water to flow until it runs clean 8 Close the water heater drain valve when flushing is completed 9 Remove the drain hose 10 Fill the water heater see Filling The Water Heater on page 52 11 Turn on the electrical supply to place the water heater back in operati...

Page 64: ... equipped with a powered anode system The anode rod s are of a permanent design and do not need replacing unless damaged Inspection and cleaning should be performed once a year NOTE Follow the instructions to drain the water heater storage tank on page 62 first Remove the powered anodes from the water heater by loosening the 3 4 NPT bushing that forms the top of the anodes Do not disassemble the r...

Page 65: ...L CONTROL BOARD LAYOUT 11 12 1 J16 J5 J3 J13 J4 J17 J10 J9 J14 J15 J1 J6 J12 1 1 1 1 1 1 1 1 1 1 1 1 2 2 2 2 2 2 2 2 2 2 2 2 3 3 3 3 3 3 3 3 3 3 3 4 4 4 4 4 4 4 4 4 4 4 5 5 5 5 5 5 6 6 6 6 6 6 7 7 8 8 8 9 9 7 10 8 Figure 66 ...

Page 66: ...Black 9 Red 10 Black 11 Red 12 Black Anode Dgnd Flame Rod Condensate Gas PS Gas V Switch Gas V 24V 24V Rtn Condensate Gas PS Gas V Switch 1 Red 2 Black CCB J6 120V Out Neutral 120 to Spark Gas Pressure Switch Red Black Red Black Upper Temperature Probe ECO 1 Red 2 Black CCB J9 Upper Probe ECO Thermistor 4 Red 3 Black ECO Thermistor Gas Valve Ground Bar Hot Neutral Blue Brown Spark Module 120V Neut...

Page 67: ...CUIT DO NOT SHARE POWER WITH WATER HEATER AS THIS MAY CAUSE ELECTRICAL LINE NOISE AND LEAD TO ERRATIC CONTROL SYSTEM OPERATION CIRCULATING PUMP WIRING DIAGRAM DISHWASHER LOOP WITH TOGGLE SWITCH FIELD SUPPLIED TEMPERATURE CONTROL INSTALLED IN THE CIRCULATING LOOP RETURN LINE DISHWASHER TOGGLE SWITCH CIRC PUMP MOTOR L1 HOT L2 NEUTRAL 120 VAC POWER NOTE USE SEPARATE 120 VAC POWER SUPPLY FOR PUMP CIRC...

Page 68: ...RCULATION ONE WATER HEATER SINGLE TEMPERATURE WITH BUILDING RECIRCULATION NOTES 1 Preferred piping method 2 The temperature and pressure relief valve setting shall not exceed pressure rating of any component in the system 3 Service valves are shown for servicing unit However local codes shall govern their usage LEGEND TEMPERATURE PRESSURE RELIEF VALVE PRESSURE RELIEF VALVE CIRCULATING PUMP TEMPERA...

Page 69: ...LATION WITH BUILDING RECIRCULATION NOTES 1 Preferred piping method 2 The temperature and pressure relief valve setting shall not exceed pressure rating of any component in the system 3 Service valves are shown for servicing unit However local codes shall govern their usage LEGEND TEMPERATURE PRESSURE RELIEF VALVE PRESSURE RELIEF VALVE CIRCULATING PUMP TEMPERATURE CONTROL PROBE DRAIN FULL PORT BALL...

Page 70: ... relief valve setting shall not exceed pressure rating of any component in the system 3 Service valves are shown for servicing unit However local codes shall govern their usage 4 The tank temperature control should be wired to and control the pump between the water heater s and the storage tank s 5 The water heater s operating thermostat should be set 5 degrees F higher than the tank temperature c...

Page 71: ...ief valve setting shall not exceed pressure rating of any component in the system 3 Service valves are shown for servicing unit However local codes shall govern their usage 4 The tank temperature control should be wired to and control the pump between the water heater s and the storage tank s 5 The water heater s operating thermostat should be set 5 degrees F higher than the tank temperature contr...

Page 72: ...RE WITH BUILDING RECIRCULATION NOTES 1 Preferred piping method 2 The temperature and pressure relief valve setting shall not exceed pressure rating of any component in the system 3 Service valves are shown for servicing unit However local codes shall govern their usage LEGEND TEMPERATURE PRESSURE RELIEF VALVE PRESSURE RELIEF VALVE CIRCULATING PUMP TEMPERATURE CONTROL PROBE DRAIN FULL PORT BALL VAL...

Page 73: ...LDING RECIRCULATION NOTES 1 Preferred piping method 2 The temperature and pressure relief valve setting shall not exceed pressure rating of any component in the system 3 Service valves are shown for servicing unit However local codes shall govern their usage LEGEND TEMPERATURE PRESSURE RELIEF VALVE PRESSURE RELIEF VALVE CIRCULATING PUMP TEMPERATURE CONTROL PROBE DRAIN FULL PORT BALL VALVE TEMPERAT...

Page 74: ...S 1 Preferred piping method 2 The temperature and pressure relief valve setting shall not exceed pressure rating of any component in the system 3 Service valves are shown for servicing unit However local codes shall govern their usage WARNING THIS DRAWING SHOWS SUGGESTED PIPING CONFIGURATION AND OTHER DEVICES CHECK WITH LOCAL CODES AND ORDINANCES FOR ADDITIONAL REQUIREMENTS ANY MATERIAL COMPONENT ...

Page 75: ...ed by improper gas supply line sizing gas type venting connections combustion air voltage wiring or fusing Failure to follow applicable codes Failure to follow printed instructions Abuse misuse accident fire flood Acts of God Improper installation sizing delivery or maintenance Claims related to rust noise smell or taste of water Failure to conduct authorized factory start up if required Alteratio...

Page 76: ...X1 Should you have any questions please Email us at techsupport gsw wh com or Visit our website www johnwoodwaterheaters com or Call our Technical Support line at 1 888 GSW TECH 479 8324 Copyright 2014 John Wood Water Heaters All rights reserved ...

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John Wood (A)JWSH100150, Instruction Manual

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