John Wood JWSH100150, AJWSH100150, AJWSH100199, JWSH100199, AJWSH100250 Installating And Operation Manual

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MODELS (A)JWSH100150 THRU (A)JWSH100250

SERIES 100 AND 101

COMMERCIAL GAS WATER HEATER

GAS-FIRED POWER BURNER

FOR DOMESTIC HOT WATER

• INSTALLATION • OPERATION • SERVICE • MAINTENANCE • LIMITED WARRANTY

WARNING: If the information in these

instructions is not followed exactly, a re

or explosion may result causing property damage, personal injury or death.

– Do not store or use gasoline or other

ammable 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 re department.

– Installation and service must be performed by a qualified installer, service agency or the gas supplier.

CAUTION

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

PLACE THESE INSTRUCTIONS ADJACENT TO HEATER AND

NOTIFY OWNER TO KEEP FOR FUTURE REFERENCE.

PRINTED 0809 316792-000

599 Hill Street West

Fergus, ON Canada N1M 2X1

MODELS (A)JWSH100150 THRU (A)JWSH100250 ROUGH-IN-DIMENSIONS

GAS VALVE PIPING

(A)JWSH100150, (A)JWSH100199, & (A)JWSH100250

3/4" NPT

Table 1. RECOVERY CAPACITIES - NATURAL GAS / L.P.

Model

(A)JWSH100150 150,000 nat/lp 100 576 432 345 288 247 216 192 173 157 144 133 123 (A)JWSH100199 199,900 nat/lp 100 767 575 460 384 329 288 256 230 209 192 177 164 (A)JWSH100250 250,000 nat/lp 100 960 720 576 480 411 360 320 288 262 240 221 206

Model

(A)JWSH100150 44 nat/lp 379 2179 1635 1308 1090 934 817 726 654 594 545 503 467 (A)JWSH100199 58 nat/lp 379 2904 2178 1743 1452 1245 1089 968 871 792 726 670 622 (A)JWSH100250 73 nat/lp 379 3632 2724 2179 1816 1557 1362 1211 1090 991 908 838 778

Recovery capacities are based on 95% thermal efciency.

Input

BTU/Hr.

Gas

kW-Hr

Usage

Liter

Usage

Gas

Approx.

Gallon

Capacity

Approx.

Capacity

30 40 50 60 70 80 90 100 110 120 130 140

17 22 28 33 39 44 50 56 61 67 72 78

TEMPERATURE RISE - DEGREES F - GALLONS PER HOUR

TEMPERATURE RISE - DEGREES C - LITERS PER HOUR

FOREWORD

These designs comply with the current version of the Standard for Gas Water Heaters, Volume III, ANSI Z21.10.3 / CSA 4.3 as automatic circulating tank water heaters, and automatic storage water heaters.

Detailed installation diagrams are found in this manual. These diagrams will serve to provide the installer with a reference for the materials and methods of piping necessary. It is highly essential that all water, gas piping and wiring be installed as shown on the diagrams.

Particular attention should be given to the installation of thermometers at the locations indicated on the diagrams as these are necessary for checking the proper functioning of the heater.

In addition to these instructions, the equipment shall be installed in accordance with those installation regulations in force in the local area where the installation is to be made. These shall be carefully followed in all cases. Authorities having jurisdiction should be consulted before installations are made.

In the absence of local codes, the installation must comply with the current editions of the CAN/CSA-B149.1, the Natural Gas and Propane Installation Code and CSA C22.1, the Canadian Electrical Code. All documents are available from the Canadian Standards Association, 5060 Spectrum Way, Mississauga, Ontario, Canada, L.

PAGE

ROUGH-IN DIMENSIONS ................................................................. 2

FOREWORD ..................................................................................... 2

FEATURES ........................................................................................ 3,4

Water Temperature Control ........................................................... 3

High Limit Switch (E.C.O.) ............................................................ 4

Dishwashing Machine Requirement .............................................. 4

Circulating Pump ........................................................................... 5

INSTALLATION INSTRUCTIONS ..................................................... 4

Required Ability ............................................................................. 4

Insulation Blankets ........................................................................ 4

Locating The Heater ...................................................................... 5

Clearances .................................................................................... 5

Hard Water .................................................................................... 6

Air Requirements .......................................................................... 6

Mechanical Exhausting of Room Air ............................................. 6

Unconned Space ......................................................................... 6

Conned Space ............................................................................. 6

Chemical Vapor Corrosion ............................................................ 6

Venting .......................................................................................... 6

Vent Pipe Termination ................................................................... 6

Installation Requirements for the

Direct Venting ................................................................................ 8

Direct Vent Terminal Installation (Sidewall) ................................... 8

Vertical Vent Terminal Installation ................................................. 9

Installation Sequence .................................................................... 9

Installation of Vent System ............................................................ 10

Vent Pipe Preparation ................................................................... 10

CONTROL AND SWITCHES ............................................................. 11

Blower Prover Switch .................................................................... 11

Blocked Outlet Prover Switch ........................................................ 11

Blocked Inlet Prover Switch .......................................................... 11

Low Gas Pressure Switch ............................................................. 11

On/Off Switch ................................................................................ 11

Hot Surface Igniter ........................................................................ 11

GAS PIPING ...................................................................................... 11

Connection of Gas Pipe ................................................................ 12

Purging .......................................................................................... 13

Gas Meter Size - City Gases Only ................................................ 13

Gas Pressure Regulation .............................................................. 13

Gas Valves .................................................................................... 13

SYSTEM CONNECTIONS ................................................................ 13

TABLE OF CONTENTS

PAGE

Thermometers ............................................................................... 13

Relief Valve ................................................................................... 13

Water Line Connections ............................................................... 13

Heater Wiring ............................................................................... 14

USING THE ELECTRONIC CONTROLLER .................................... 15

Overview ...................................................................................... 15

Operating States .......................................................................... 15

Adjusting the Operating Set Point ................................................ 16

Changing the Display Units .......................................................... 17

Fault and Warning Conditions ...................................................... 17

Access to the Current Fault or Warning ....................................... 17

Viewing the Fault History ............................................................. 18

PRIOR TO START-UP ...................................................................... 18

Required Ability ............................................................................ 18

OPERATING INSTRUCTIONS ......................................................... 19

Adjustment Procedure (Initial Start-Up) 120 and 150 Models ...... 19

Adjustment Procedure (Initial Start-Up) 199 and 250 Models ...... 19

Cathodic Protection ...................................................................... 20

Precautions .................................................................................. 20

GENERAL INFORMATION ............................................................... 20

Power Burner ............................................................................... 20

High Limit ..................................................................................... 20

High Altitude Installations ............................................................. 20

MAINTENANCE ............................................................................... 20

General ........................................................................................ 20

Maintenance Schedule ................................................................ 20

Flushing ........................................................................................ 23

Draining ........................................................................................ 23

Sediment Removal ....................................................................... 23

Lime Scale Removal .................................................................... 23

Anode Inspection and Replacement ............................................ 23,24

Drain Valve and Access Panels ................................................... 24

Relief Valve .................................................................................. 24

Circulating Pump .......................................................................... 24

Vent System ................................................................................. 24

INSTALLATION DIAGRAMS ............................................................ 25-29

Manifold Kits ................................................................................. 30

CHECKLIST AND SERVICE INFORMATION .................................. 31

TROUBLE-SHOOTING .................................................................... 31

LIMITED WARRANTY ...................................................................... 33

FEATURES

IMPORTANT

IT IS REQUIRED THAT A QUALIFIED SERVICE TECHNICIAN PERFORM THE INITIAL FIRING OF THE HEATER. AT THIS TIME THE USER SHOULD NOT HESITATE TO ASK THE TECHNICIAN ANY QUESTIONS WHICH HE MAY HAVE IN REGARD TO THE OPERATION AND MAINTENANCE OF THE UNIT.

A CHECKLIST AND SERVICE INFORMATION section are included at the rear of this manual. By using this checklist the user may be able to make minor operational adjustments and save himself unnecessary service calls. However, the user should not attempt repairs which are not listed in this section.

WATER TEMPERATURE CONTROL

TH IS WATER HEATER IS EQU IPP ED WITH AN ADJUSTAB LE

DANGER

THERMOSTAT TO CONTROL WATER TEMPERATURE. HOT WATER TEMPERATURES REQUIRED FOR AUTOMATIC DISHWASHER AND LAUNDRY USE CAN CAUSE SCALD BURNS RESULTING IN SERIOUS PERSONAL INJURY AND/OR DEATH. THE TEMPERATURE AT WHICH INJURY OCCURS VARIES WITH THE PERSON’S AGE AND THE TIME OF THE EXPOSURE. THE SLOWER RESPONSE TIME OF CHILDREN, AGED OR DISABLED PERSONS INCREASES THE HAZARDS TO THEM. NEVER ALLOW SMALL CHILDREN TO USE A HOT WATER TAP, OR TO DRAW THEIR OWN BATH WATER. NEVER LEAVE A CHILD OR DISABLED PERSON UNATTENDED IN A BATHTUB OR SHOWER.

THE WATER HEATER SHOULD BE LOCATED IN AN AREA WHERE THE GENERAL PUBLIC DOES NOT HAVE ACCESS TO SET TEMPERATURES.

The water temperature is controlled using the Temperature Control Button on the Display at the front of the unit (See Figure 1). This control utilizes two temperature probes to determine the tank temperature. The primary temperature probe is located at the top of the tank and the other is near the water inlet.

The temperature may be adjusted from 90°F/32°C to 180°F/82°C. The thermostat was adjusted to 120°F/49°C before the heater was shipped from the factory. It is recommended that lower water temperature be used to avoid the risk of scalding. It is further recommended, in all cases, that the water

temperature be set for the lowest temperature which satises your hot water needs. This will also provide the most energy efcient operation of the water

heater and minimize scale formation.

SETTING THE WATER HEATER TEMPERATURE AT 120°F/49°C WILL REDUCE THE RISK OF SCALDS.

Figure 1 shows the approximate time-to-burn relationship for normal adult skin. Short repeated heating cycles caused by small hot water uses can cause temperatures at the point of use to exceed the thermostat setting by up to 20°F/11°C. If you experience this type of use, you should consider using lower temperature settings to reduce scald hazards.

DISHWASHING MACHINE REQUIREMENT

All dishwashing machines meeting the National Sanitation Foundation

requirements are designed to operate with water ow pressures between

15 and 25 pounds per square inch (103 Kpa and 173 Kpa). Flow pressures above 25 pounds per square inch (173 Kpa), or below 15 pounds per square inch (103 Kpa), will result in improperly sanitized dishes. Where pressures

are high, a water pressure reducing or ow regulating control valve should

be used in the 180°F (82°C) line to the dishwashing machine, and should be adjusted to deliver water between these limits.

Water Time to Produce 2nd & 3rd Temperature Degree Burns on Adult Skin 180°F / 82°C Nearly instantaneous 170°F / 77°C Nearly instantaneous 160°F / 71°C About 1/2 second 150°F / 66°C About 1-1/2 seconds 140°F / 60°C Less than 5 seconds 130°F / 54°C About 30 seconds 120°F / 49°C More than 5 minutes

FIGURE 1.

Valves for reducing point-of-use temperature by mixing cold and hot water are available (see Figure 2). Also available are inexpensive devices that attach to faucets to limit hot water temperatures. Contact a licensed plumber or the local plumbing authority.

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 ow by means of the

plug cock in the circulating line. (See installation diagrams.)

CIRCULATING PUMP

A circulating pump is used when a system requires a circulating loop or there is a storage tank used in conjunction with the heater. Refer to the piping diagrams at rear of manual for electrical hookup information and install in accordance with the current edition of the National Electrical Code, NFPA 70 or the Canadian Electrical Code, CSA C22.1.

All bronze circulating pumps are recommended for used with commercial water heaters.

Although circulating pumps are oiled and operated by the manufacturer some circulating pumps must be oiled again before operated. Please refer to manufacturer's instructions.

INSTALLATION INSTRUCTIONS

REQUIRED ABILITY

FIGURE 2.

HIGH LIMIT SWITCH (E.C.O.)

The top immersion well of the dual bulb controller also contains the high limit (energy cutoff) sensor. The high limit switch interrupts the main burner gas

ow should the water temperature reach approximately 202°F/94°C.

Should the high limit switch activate, the control system will automatically reset the unit once the water temperature in the tank falls below 140°F/60°C. If the unit is manually shut down and restarted, as long as the temperature in the tank is lower than 160°F/71°C, the unit will reset and initiate operation.

High limit switch operation is the likely cause when higher than normal water temperatures occur with a recurring need to restart the water heater. This could be due to a malfunctioning thermostat allowing the gas valve to remain

open and the burner to continue ring even after water temperature in the

tank has already reached the set point. Contact your dealer or servicer if continued high limit switch operation occurs.

INSTALLATION OR SERVICE OF THIS WATER HEATER REQUIRES ABILITY EQUIVALENT TO THAT OF A LICENSED TRADESMAN IN THE FIELD INVOLVED. PLUMBING, AIR SUPPLY, VENTING, GAS SUPPLY AND ELECTRICAL WORK ARE REQUIRED.

INSULATION BLANKETS

Insulation blankets available to the general public for external use on gas water heaters are not approved for use on your water heater. The purpose of an insulation blanket is to reduce the standby heat loss encountered with storage tank water heaters. Your water heater meets or exceeds the ASHRAE/IES 90.1 1999 standards with respect to insulation and standby loss requirements, making an insulation blanket unnecessary.

WARNING

Should you choose to apply an insulation blanket to this heater, you should follow these instructions. Failure to follow these instructions can result in

re, asphyxiation, serious personal injury or death.

• Do not apply insulation to the top, or the upper 15" (38 cm) of the water

heater, as this will interfere with safe operation.

• Do not cover the temperature & pressure relief valve.

• Do not cover the instruction manual. Keep it on the side of the water

heater or nearby for future reference.

• Do obtain new labels from John Wood for placement on the blanket

directly over the existing labels.

LOCATING THE HEATER

WARNING

THERE IS A RISK IN USING FUEL BURNING APPLIANCES SUCH AS GAS WATER HEATERS IN ROOMS, GARAGES OR OTHER AREAS WHERE GASOLINE, OTHER FLAMMABLE LIQUIDS OR ENGINE DRIVEN EQUIPMENT OR VEHICLES ARE STORED, OPERATED OR REPAIRED. FLAMMABLE VAPORS ARE HEAVY AND TRAVEL ALONG THE FLOOR AND MAY BE IGNITED BY THE HEATER’S IGNITER OR MAIN BURNER FLAMES CAUSING FIRE OR EXPLOSION. SOME LOCAL CODES PERMIT OPERATION OF GAS APPLIANCES IF INSTALLED 18 INCHES (46 cm) OR MORE ABOVE THE FLOOR. THIS MAY REDUCE THE RISK IF LOCATION IN SUCH AN AREA CANNOT BE AVOIDED.

THE HEATER SHALL BE LOCATED OR PROTECTED SO IT IS NOT SUBJECT TO PHYSICAL DAMAGE BY A MOVING VEHICLE.

DO NOT LOCATE THE HEATER WHERE NOISE FROM THE EXHAUST OR INTAKE WILL BE OBJECTIONABLE. THIS INCLUDES LOCATIONS CLOSE TO OR ACROSS FROM WINDOWS AND DOORS. AVOID ANCHORING THE VENT AND INTAKE PIPES DIRECTLY TO FRAMED WALLS, FLOORS OF CEILINGS UNLESS RUBBER ISOLATION PIPE HANGERS ARE USED. THIS PREVENTS ANY VIBRATIONS FROM BEING TRANSMITTED INTO THE LIVING SPACES.

WARNING

THIS WATER HEATER IS A CONDENSING UNIT AND REQUIRES A DRAIN TO BE LOCATED IN CLOSE PROXIMITY TO ALLOW THE CONDENSATE TO DRAIN SAFELY. THE CONDENSATE DRAINS FROM THE UNIT AT THE EXHAUST ELBOW LOCATED AT THE BOTTOM OF THE UNIT. NOTE: IT IS IMPORTANT THAT THE CONDENSATE HOSE NOT BE ELEVATED ABOVE THE EXHAUST ELBOW (SEE FIGURE 3). THE CONDENSATE BUILD-UP WILL BLOCK THE EXHAUST OUTLET, WHICH WILL CAUSE IMPROPER OPERATION.

FIGURE 3.

WARNING

FLAMMABLE ITEMS, PRESSURIZED CONTAINERS OR ANY OTHER POTENTIAL FIRE HAZARDOUS ARTICLES MUST NEVER BE PLACED ON OR ADJACENT TO THE HEATER. OPEN CONTAINERS OF FLAMMABLE MATERIAL SHOULD NOT BE STORED OR USED IN THE SAME ROOM WITH THE HEATER.

When installing the heater, consideration must be given to proper location. Location selected should be as close to the intake and exhaust termination points as practicable, with adequate air supply and as centralized with the piping system as possible.

THE HEATER MUST NOT BE LOCATED IN AN AREA WHERE IT WILL BE SUBJECT TO FREEZING.

LOCATE IT NEAR A FLOOR DRAIN. THE HEATER SHOULD BE LOCATED IN AN AREA WHERE LEAKAGE FROM THE HEATER OR CONNECTIONS WILL NOT RESULT IN DAMAGE TO THE ADJACENT AREA OR TO LOWER FLOORS OF THE STRUCTURE.

When such locations cannot be avoided, it is recommended that a suitable drain pan, adequately drained, be installed under the appliance.

Water heater life depends upon water quality, water pressure and the environment in which the water heater is installed. Water heaters are sometimes installed in locations where leakage may result in property damage, even with the use of a drain pan piped to a drain. However, unanticipated damage can be reduced or prevented by a leak detector or water shut-off device used in conjunction with a piped drain pan. These devices are available from some plumbing supply wholesalers and retailers, and detect and react to leakage in various ways:

WARNING

DO NOT USE THIS APPLIANCE 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.

CLEARANCES

These heaters are approved for installation on combustible ooring in an

alcove when the minimum clearances from any combustion construction are followed as indicated in Figure 4.

In all installations the minimum combustible clearances from any vent piping shall be 0". Vent piping passing through a combustible wall or ceiling must be a continuous run (no joints).

A service clearance of 24" (61 cm) should be maintained from serviceable

parts such as relief valves, ue bafes, ue damper devices, thermostats,

cleanout openings or drain valves.

Always disconnect electrical power before servicing the unit.

• Sensors mounted in the drain pan that trigger an alarm or turn off the

incoming water to the water heater when leakage is detected.

• Sensors mounted in the drain pan that turn off the water supply to the entire

home when water is detected in the drain pan.

• Water supply shut-off devices that activate based on the water pressure

differential between the cold water and hot water pipes connected to the water heater.

• Devices that will turn off the gas supply to a gas water heater while at the

same time shutting off its water supply.

FIGURE 4.

*ILLUSTRATION OF MINIMUM COMBUSTIBLE CLEARANCES IN AN ALCOVE.

HARD WATER

Where hard water conditions exist, water softening or the threshold type of water treatment is recommended. This will protect the dishwashers, coffee urns, water heaters, water piping and other equipment.

See MAINTENANCE section for details of tank cleanout procedure.

AIR REQUIREMENTS

KEEP APPLIANCE AREA CLEAR AND FREE OF COMBUSTIBLE MATERIALS, GASOLINE AND OTHER FLAMMABLE VAPORS AND LIQUIDS.

DO NOT OBSTRUCT THE FLOW OF COMBUSTION AND VENTILATING AIR.

WARNING

FOR SAFE OPERATION PROVIDE ADEQUATE AIR FOR COMBUSTION AND VENTILATION. AN INSUFFICIENT SUPPLY OF AIR WILL CAUSE RECIRCULATION OF COMBUSTION PRODUCTS RESULTING IN CONTAMINATION THAT MAY BE HAZARDOUS TO LIFE. SUCH A CONDITION OFTEN WILL RESULT IN A YELLOW, LUMINOUS BURNER FLAME, CAUSING CARBONING OR SOOTING OF THE COMBUSTION CHAMBER, BURNERS AND FLUE TUBES AND CREATES A RISK OF ASPHYXIATION.

MECHANICAL EXHAUSTING OF ROOM AIR

Where an exhaust fan is installed in the same room with a heater, sufcient

openings for air must be provided in the walls. UNDERSIZED OPENINGS WILL

CAUSE AIR TO BE DRAWN INTO THE ROOM THROUGH THE HEATER’S VENTING SYSTEM, CAUSING POOR COMBUSTION. SOOTING MAY RESULT IN SERIOUS DAMAGE TO THE HEATER AND RISK OF FIRE OR EXPLOSION. IT CAN ALSO CREATE A RISK OF ASPHYXIATION.

If the conned space is within a building of tight construction, air for combustion and ventilation must be obtained from outdoors. When directly communicating with the outdoors through vertical ducts, two permanent openings, located in the above manner, shall be provided. Each opening shall have a free area of not less than one square inch (6.5 cm²) per 4000 Btuh of the total input of all appliances in the enclosure. If horizontal ducts are used, each opening shall have a free area of not less than one square inch (6.5 cm²) per 2000 Btuh of the total input of all appliances in the enclosure.

CHEMICAL VAPOR CORROSION

WARNING

CORROSION OF THE FLUE WAYS AND VENT SYSTEM MAY OCCUR IF AIR FOR COMBUSTION CONTAINS CERTAIN CHEMICAL VAPORS. 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, waxes, and process chemicals are typical compounds which are potentially corrosive.

PRODUCTS OF THIS SORT SHOULD NOT BE STORED 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.

VENTING

WARNING

THE INSTRUCTIONS IN THIS SECTION ON VENTING MUST BE FOLLOWED TO AVOID CHOKED COMBUSTION OR RECIRCULATION OF FLUE GASES. SUCH CONDITIONS CAUSE SOOTING OR RISKS OF FIRE AND ASPHYXIATION.

UNCONFINED SPACE

In buildings of conventional frame, brick or stone construction, unconned

spaces may provide adequate air for combustion and ventilation.

If the unconfined space is within a building of tight constructi on (buildings using the following construction: weather stripping, heavy insulation, caulking, vapor barrier, etc.), air for combustion and ventilation

must be obtained from outdoors. The installation instructions for conned

spaces in tightly constructed buildings must be followed to ensure adequate air supply.

CONFINED SPACE

When drawing combustion air from inside a conventionally constructed

building to a conned space, such a space shall be provided with two

permanent openings, ONE IN OR WITHIN 12" (31 cm) OF THE ENCLOSURE TOP AND ONE IN OR WITHIN 12" (31 cm) OF THE ENCLOSURE BOTTOM. Each opening shall have a free area of at least one square inch (6.5 cm²) per 1000 Btuh appliances in the enclosure, but not less than 100 square inches (645 cm²).

Heater must be protected from freezing downdrafts during shutdown periods.

WARNING

NEVER OPERATE THE HEATER UNLESS IT IS VENTED TO THE OUTDOORS AND HAS ADEQUATE AIR SUPPLY TO AVOID RISKS OF IMPROPER OPERATION, FIRE, EXPLOSION OR ASPHYXIATION.

VENT PIPE TERMINATION

NOTE: Before installing venting, determine place of vent pipe termination. See Figures 5a & b and 6a & b before proceeding.

CAUTION

DO NOT TERMINATE THE VENTING WHERE NOISE FROM THE EXHAUST OR INTAKE WILL BE OBJECTIONABLE. THIS INCLUDES LOCATIONS CLOSE TO OR ACROSS FROM WINDOWS AND DOORS. AVOID ANCHORING THE VENT AND INTAKE PIPES DIRECTLY TO FRAMED WALLS, FLOORS OR CEILINGS UNLESS RUBBER ISOLATION PIPE HANGERS ARE USED. THIS PREVENTS ANY VIBRATIONS FROM BEING TRANSMITTED INTO THE LIVING SPACES.

CAUTION

TO PREVENT EXHAUSTING PRODUCTS FROM CIRCULATING TO THE AIR INTAKE

IN WINDY/COLD AREAS, THE MAXIMUM PRACTICAL DISTANCE BETWEEN

THESE TWO TERMINALS IS RECOMMENDED.

CANADIAN POWER VENT

FIGURE 5.

CANADIAN DIRECT VENT

FIGURE 6.

IMPORTANT

The vent system must terminate so that proper clearances are maintained as cited in local codes or the current editions of the National Fuel Gas Code, ANSI Z223.1/NFPA 54 or the Natural Gas and Propane Installation Code, CAN/CSA-B149.1.

Installation of this water heater must comply with CAN/CSA B149.1

- Natural Gas and Propane Installation Code which requires the vent system components be certied to ULC S636.

Do not terminate the exhaust vent terminal over public area where condensate or vapor can cause nuisance or hazard.

Plan the vent system layout so that proper clearances are maintained from plumbing and wiring.

Vent pipes serving power vented appliances are classied by building codes

as "vent connectors". Required clearances from combustible materials must be provided in accordance with information in this manual under LOCATION OF HEATER and CLEARANCES, and with National Fuel Gas Code and local Codes.

NOTE: TO PREVENT EXHAUSTING PRODUCTS FROM CIRCULATING TO THE AIR INTA KE IN WINDY/COLD AREA S, THE M AXI MUM PR ACTICAL DISTANCE BET WEEN THESE TWO TERMINALS IS RECOMMENDED.

FOR ALL MODELS

FIGURE 8.

IMPORTANT

Plan the layout of the vent system backwards from the vent termination to the appliance.

WARNING

USE ONLY THE VENT TERMINALS SUPPLIED WITH THIS UNIT. TERMINATION OF A VENT SYSTEM WITH A DEVICE OTHER THAN THE SUPPLI ED VEN T TERMINATIONS WILL AFF ECT SYSTEM PERFORMANCE AND RESULT IN A SAFETY HAZARD.

DIRECT VENTING

The intake vent terminals provided on the unit contains a mesh screen (see Figure 7) to prevent large particles from entering the unit.

FIGURE 7.

IMPORTANT

WHEN LOCATING THE TERMINALS ON A SIDEWALL, THE FOLLOWING SPECIFICATIONS PERTAINING TO TERMINAL LOCATION MUST BE FOLLOWED.

1. The air intake terminal and the exhaust vent terminal must terminate on the same exterior wall.

2. The vertical centerline of the air intake terminal must be located at a minimum of 24" (61 cm).

3. The horizontal centerline of the air intake terminal may not be located below the horizontal centerline of the exhaust vent terminal.

CAUTION

Vent terminals supplied with the heater must be used.

NOTE: BEFORE BEGINNING INSTALLATION OF ANY VENT PIPE READ THE VENT PIPE MANUFACTURER'S INSTALLATION INSTRUCTIONS.

1. After the points of termination have been determined, use the cover plates as templates to mark the holes for the vent pipes to be inserted through the wall. BEWARE OF CONCEALED WIRING AND PIPING INSIDE OF WALL.

2. If the vent terminals are being installed on the outside of a nished wall, it

may be easier to mark both the inside and outside wall. Align the holes by drilling a hole through the center of the template from the inside through to the outside. The template can now be positioned on the outside wall using the drilled holes as a centering point for the template.

WHEN THE UNIT IS TO BE SETUP AS A DIRECT VENT, THE MESH SCREEN

WARNING

MUST BE REMOVED. THE INLET VENT PIPE MAY THEN BE GLUED TO THE INTAKE VENT TERMINALS (see Figure 8) PROVIDED ON THE UNIT.

DIRECT VENT TERMINAL INSTALLATION

IMPORTANT

THIS UNIT CONSISTS OF TWO VENT TERMINALS - AN INTAKE VENT TERMINAL AND AN EXHAUST VENT TERMINAL. THE INTAKE VENT TERMINAL IS A 3" 45° PVC ELBOW WITH A DOME MESH WIRE SCREEN AND THE EXHAUST VENT TERMINAL IS A 3" 45°PVC ELBOW WITH A MESH WIRE SCREEN.

3. A) MASONRY SIDE WALLS

Chisel an opening approximately 1/2" (1.3 cm) larger than the marked

circle.

B) WOODEN SIDE WALLS Drill a pilot hole approximately one quarter inch outside of the marked

circle. This pilot hole is used as a starting point for a saws-all or sabre saw blade. Cut around the marked circle staying approximately one quarter inch outside of the line. (This will allow the vent pipe to easily slide through the opening. The resulting gap will be covered by the vent terminal cover plates.) Repeat this step on the inside wall if necessary.

4. Cut a length of 3" PVC pipe about 3.5" (8.9 cm) longer than the wall thickness at the opening.

5. Glue the intake vent terminal to the section of the pipe.

VERTICAL VENT TERMINAL INSTALLATION

6. Slide the wall plate over the pipe to stop against intake vent terminal.

7. Place a bead of caulking (not supplied) around the gap between the pipe and the wall. Place some of the caulking on the back of the plate to hold it against the wall after installation.

8. If the vent pipe is installed up to the wall, with a coupling on the end against the wall opening, the pipe with the vent terminal can be prepared for gluing before inserting through the wall. Slide the pipe through the wall and insert into coupling on the other side of the wall, making sure that the vent terminal ends up pointed in the correct position (See Figure 9).

IMPORTANT

WH EN TER MIN ATIN G THROUGH A ROOF, THE FOL LOW ING SPECIFICATIONS PERTAINING TO TERMINAL LOCATION MUST BE FOLLOWED.

1. Proper support must be provided for all pipe protruding through the roof.

2. The vertical roof terminations should be sealed with a plumbing roof boot

or equivalent ashing.

3. The intake vent termination and the exhaust vent termination must penetrate the same side of roof.

4. The center line of the intake vent termination and the center line of the exhaust vent termination must be no closer than 24" (61cm).

5. The intake vent terminal and the exhaust vent terminal must be oriented facing downward and the same direction.

The specications are displayed in Figure 10 & 11.

NOTE: Exhaust vent terminal is installed using the same procedure.

INSTALLATION SEQUENCE

NOTE: BEFORE BEGINNING INSTALLATION OF ANY VENT PIPE, READ “VENT PIPE PREPARATION” SECTION ON PAGE 12.

FIGURE 9.

1. After the points of termination have been determined, use the cover plates as templates to mark the holes for the vent pipes to be inserted through the roof.

2. Drill a pilot hole approximately 1/4" (6 mm) outside of the marked circle. This pilot hole is used as a starting point for a saws-all or sabre saw blade. Cut around the marked circle staying approximately one quarter inch outside the line. (This will allow the vent pipe to easily slide through the opening). The resulting gap will be covered by the roof

boot/ashing.

3. Suspend the pipe through the center of the hole using proper support.

4. Slide roof boot or equivalent ashing over pipe and secure roof boot equivalent ashing to roof.

5. Seal around ashing.

6. Terminate intake terminal and exhaust vent terminal facing down as shown in Figure 11.

FIGURE 10.

FIGURE 11.

INSTALLATION OF VENT SYSTEM

WARNING

THE OPTIONAL INTAKE VENTING ARRANGEMENT AND THE EXHAUST VENTING ARRANGEMENT MUST BE INSTALLED TO RUN DIRECTLY TO THE OUTDOORS AND NOT IN ANY WAY BE CONNECTED TO ANOTHER VENTING SYSTEM (I.E. FURNACE, DRYERS OR SPACE HEATERS). IT IS CRUCIAL THAT THE VENTING ARRANGEMENT BE KEPT SEPARATE FROM OTHER VENTING SYSTEMS. IF THIS WARNING IS IGNORED, AND THE SYSTEM IS VENTED INCORRECTLY, IT MAY CAUSE IMPROPER OPERATION, FIRE, EXPLOSION, OR ASPHYXIATION.

1. Plan the route of the vent system from the vent termination to the planned location of the appliance. Layout the total vent system to use the minimum of vent pipe and elbows possible.

NOTE: for Water Heaters in locations with high ambient temperatures (above

100°F or 38°C) and/or insufcient dilution air, it is recommended that CPVC pipe and ttings marked ULC S636 compliant (MUST USE SUPPLIED VENT

TERMINAL) be used.

4. It is important that condensate not be allowed to buildup in the exhaust vent pipe. To prevent this from happening the pipe should be installed with a slight, 1/8" (3mm) per 5' (152 cm) of pipe maximum downward (toward terminal) slope.

5. The vent system should be supported every 5' (152 cm) of vertical run and every 3' (91cm) of horizontal run of vent pipe length.

NOTE: Stress levels in the pipe and ttings can be signicantly increased

by improper installation. If rigid pipe clamps are used to hold the pipe in place, or if the pipe cannot move freely through a wall penetration, the pipe may be directly stressed, or high thermal stresses may be formed when the pipe heats up and expands. Install accordingly to minimize such stresses.

2. The installer may add up to a MAXIMUM OF FIFTY (50) EQUIVALENT FEET (15.2 m) of 3" pipe to the exhaust venting arrangement. This addition of FIFTY (50) EQUIVALENT FEET (15.2 m) of pipe on both the intake venting arrangement and exhaust venting arrangement must include any 3" PVC elbows which equals (5) EQUIVALENT FEET (1.5 m) of pipe.

Table 2. VENT LENGTH TABLE

Number 3" 3" 4"

of 90° Minimum Maximum Maximum

Elbows Pipe (Ft./M.) Pipe (Ft./M.) Pipe (Ft./M.) ONE (1) 7/2 45/13.7 115/35 TWO (2) 7/2 40/12.2 110/33.5 THREE (3) 7/2 35/10.7 105/32 FOUR (4) 7/2 30/9.1 100/30.5 FIVE (5) 7/2 --- 95/29 SIX (6) 7/2 --- 90/27.4

4" PVC may be used for a MAXIMUM intake of ONE HUNDRED TWENTY (120) EQUIVALENT FEET (36.6m) and a MAXIMUM exhaust of ONE HUNDRED TWENTY (120) EQUIVALENT FEET (36.6m). The maximum number of 90° elbows with the 4" venting is six (6) on the intake and six (6)

on the exhaust. A 90° elbow is equal to ve (5) equivalent feet (1.5m) of pipe. One (1) 90° elbow is equal to two (2) 45° elbows. Any venting conguration

using less than 50 equivalent feet should use 3" venting. See Table 2. For either vent diameter, the maximum vent lengths in Table 2 are EXCLUSIVE of the factory-installed vent component and prescribed terminations. That is, the equivalent vent lengths associated with the 90° elbow (installed on the unit) and the 45° termination elbow should NOT be considered part of the vent lengths referred to in Table 2.

The 3 " vent i ng ter m inal s (pro v ided ) must b e used w i th the 3" vent pipe. Two, approved 4" vent terminals (not provided) must be used with 4" vent pipe. See replacement parts list for terminals.

IMPORTANT

When multiple units are direct vented through a wall (3" or 4" venting), no intake air terminal should be lower than the highest exhaust vent terminal.

VENT PIPE PREPARATION

1. INITIAL PREPARATION

A. Make sure the solvent cement you are planning to use is designed

for the specic application you are attempting.

B. Know the physical and chemical characteristics and limitations of

the PVC or CPVC piping materials that you are about to use.

C. Know the reputation of your pipe and cement manufacturer and

their products.

D. Know your own qualications or those of your contractor. The solvent

welding technique of joining PVC or CPVC pipe is a specialized skill

just as any other pipe tting technique.

E. Closely supervise the installation and inspect the nished job before

start-up.

F. Contact the manufacturer, supplier, or competent consulting agency

if you have any questions about the application or installation of PVC or CPVC pipe.

G. Take the time and effort to do a professional job. Shortcuts will only

cause you problems and delays in start-up. The majority of failures in these systems are the result of shortcuts and/or improper joining techniques.

2. SELECTION OF MATERIALS

PRIMER

It is recommended that Tetrahydrofuran (THF) be used to prepare the surfaces

of pipe and ttings for solvent welding. Do not use water, rags, gasoline or

any other substitutes for cleaning PVC or CPVC surfaces. A chemical cleaner such as MEK may be used.

CEMENT

The only cement approved for this system is IPEX System 636 CPVC Cement

Product for use on marked PVC and CPVC ULC S636 pipe and ttings.

NOTE: This water heater can only be vented with PVC pipe certied and

marked as complying with ULC S636 and glued with IPEX System 636 CPVC Cement Product .

SAFETY PRECAUTION: PRIMERS AND CEMENTS ARE EXTREMELY FLAMMABLE AND MUST NOT BE STORED OR USED NEAR HEAT OR OPEN FLAME. ALSO, USE ONLY IN A WELL-VENTILATED AREA.

CONTROLS AND SWITCHES

All models are provided with four pressure switches. These switches are essential to the safe and proper operation of the unit. All switches are wired in series. The controller is set up to shut the unit down whenever there is a failure of any of the switches. It is important to understand the purpose of each switch.

LOW GAS PRESSURE SWITCH

(SEE FIGURE 12)

The Low Gas Switch (LGS) is a single-pole, normally open pressure switch that will close its contacts when a rising pressure of 5.0 in. (1.25Kpa) W.C. is encountered. The contacts will open when the pressure falls below the

xed set point of 4.8"WC (1.18Kpa) for natural gas models and 8.5"WC

(2.08Kpa) for propane models. The LGS monitors the gas supply pressure to the heater. If the gas supply falls below 5.0 in. (1.25Kpa) W.C., the main burner is extinguished (if heater is running) or the heater will not start up.

ON/OFF SWITCH

The ON/OFF Switch is a single-pole, single-throw rocker switch. This switch provides 120V from the line source to the heater.

FIGURE 12.

BLOWER PROVER SWITCH

(SEE FIGURE 12)

The Blower Prover Switch is provided on the heater to verify that the fan is operating. It is a positive pressure switch whose electrical contacts are normally open. When the fan increases the pressure in the burner, the pressure switch will allow the electrical contacts to close. The pressure switch is connected to the burner tap by a piece of tygon tubing. This tubing must be connected in order for the switch to change the electrical contacts. The

controller requires that the electrical contacts on this air ow switch be open

before it will allow the blower to come on.

THE WATER HEATER IS POLARITY SENSITIVE. BEFORE APPLYING

CAUTION

ELECTRICITY TO THIS HEATER BE CERTAIN THAT SUPPLY NEUTRAL WIRE TO GROUND CHECK INDICATES ZERO VOLTAGE.

HOT SURFACE IGNITER

The Hot Surface Igniter is a device that ignites the main burner by high temperature (>1800°F or >982°C). When 120VAC is applied to the igniter,

sufcient heat is generated to ignite the main burner. Although improvements

have been made to strengthen the igniter, it is still fragile and care must be taken when handling the igniter to prevent breakage.

GAS PIPING

Contact your local gas service company to ensure that adequate gas service is available and to review applicable installation codes for your area.

Size the main gas line in accordance with Table 3. The gures shown are

for straight lengths of pipe at 0.5" (125Pa) W.C. pressure drop, which is

considered normal for low pressure systems Note that ttings such as elbows

and tees will add to the pipe pressure drop.

CAUTION

DO NOT USE FLEXIBLE GAS PIPING.

TABLE 3. MAXIMUM CAPACITY OF PIPE IN CUBIC FEET OF GAS PER HOUR

(Based upon a Pressure Drop of 0.5") Water Column and 0.6 Specic Gravity Gas and max. gas pressure of 0.5 psig)

BLOCKED OUTLET PROVER SWITCH

(SEE FIGURE 12)

The Blocked Outlet Prover Switch is set up to shut the unit off when a build-up of positive pressure in the exhaust vent pipe occurs. This switch is a positive pressure switch that requires an increase in pressure to change the electrical contacts from normally closed to open. When this switch prevents the unit from igniting, most likely the exhaust is blocked by some means Check to

see if the condensate is allowed to ow freely from the exhaust elbow and

for obstructions in the exhaust venting and exhaust vent terminal. Also verify

that there is no more than fty equivalent feet (15.2 m) of three inch PVC

vent pipe on the exhaust.

BLOCKED INLET PROVER SWITCH

(SEE FIGURE 12)

The Blocked Inlet Prover Switch is set up to shut the unit off when a build-up of negative pressure in the intake vent pipe occurs. This switch is a negative pressure switch that requires an increase in negative pressure to change the electrical contacts from normally closed to open. The switch is connected

to the pressure tap on the PVC ange connected to the inlet of the blower.

When this switch prevents the unit from igniting, most likely the intake is

blocked by some means. Check to see if there is no more than fty equivalent

feet (15.2 m) of three inch PVC vent pipe on the intake. Also verify that the intake and intake vent terminal is free of obstructions that may prevent air from entering the unit.

LENGTH NORMAL IRON PIPE SIZES (INCHES)

IN INPUT IN THOUSANDS BTU/HR

FEET 1/2" 3/4" 1" 1 1/4" 1 1/2" 2" 2 1/2" 3" 4" 10 175 360 680 1400 2100 3960 6300 11000 23000 20 120 250 485 950 1460 2750 4360 7700 15800 30 97 200 375 770 1180 2200 3520 6250 12800 40 82 170 320 660 990 1900 3000 5300 10900 50 73 151 285 580 900 1680 2650 4750 9700 60 66 138 260 530 810 1520 2400 4300 8800 70 61 125 240 490 750 1400 2250 3900 8100 80 57 118 220 460 690 1300 2050 3700 7500 90 53 110 205 430 650 1220 1950 3450 7200 100 50 103 195 400 620 1150 1850 3250 6700 125 44 93 175 360 550 1020 1650 2950 6000 150 40 84 160 325 500 950 1500 2650 5500 175 37 77 145 300 460 850 1370 2450 5000 200 35 72 135 280 430 800 1280 2280 4600

LENGTH NORMAL IRON PIPE SIZES (INCHES) IN INPUT IN KW

METERS 1/2" 3/4" 1" 1 1/4" 1 1/2" 2" 2 1/2" 3" 4"

3.0 51 105 199 410 615 1160 1845 3221 6735

6.1 35 73 142 278 428 805 1277 2255 4626

9.1 28 59 110 225 346 644 1031 1830 3748

12.2 24 50 94 193 290 556 878 1552 3192

15.2 21 44 83 170 264 492 776 1391 2840

18.3 19 40 76 155 237 445 703 1259 2577

21.3 18 37 70 143 220 410 659 1142 2372

24.4 17 35 64 135 202 381 600 1083 2196

27.4 16 32 60 126 190 357 571 1010 2108

30.5 15 30 57 117 182 337 542 952 1962

38.1 13 27 51 105 161 299 483 864 1757

45.7 12 25 47 95 146 278 439 776 1610

53.3 11 23 42 88 135 249 401 717 1464

61.0 10 21 40 82 126 234 375 688 1347

THE HEATER IS NOT INTENDED FOR OPERATION AT HIGHER

WARNING

THAN 10.5" (2.59 KPa) WATER COLUMN SUPPLY GAS PRESSURE. HIGHER GAS SUPPLY PRESSURES REQUIRE SUPPLEMENTAL REDUCING SERVICE REGULATION. EXPOSURE TO HIGHER GAS SUPPLY PRESSURE MAY CAUSE DAMAGE TO THE GAS CONTROLS 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. VENT BLOCKAGE MAY OCCUR DURING ICE STORMS.

IT IS IMPORTANT TO GUARD AGAINST GAS VALVE FOULING FROM CONTAMINANTS IN THE GAS WAYS. SUCH FOULING MAY CAUSE IMPROPER OPERATION, FIRE OR EXPLOSION.

IF COPPER SUPPLY LINES ARE USED THEY MUST BE INTERNALLY TINNED AND CERTIFIED FOR GAS SERVICE.

BEFORE ATTACHING THE GAS LINE BE SURE THAT ALL GAS PIPE IS CLEAN ON THE INSIDE.

TO TRAP ANY DIRT OR FOREIGN MATERIAL IN THE GAS SUPPLY LINE, A DIRT LEG (SOMETIMES CALLED A SEDIMENT TRAP OR DRIP LEG) MUST BE INCORPORATED IN THE PIPING (SEE FIGURE 13). THE DIRT LEG MUST BE READILY ACCESSIBLE AND NOT SUBJECT TO FREEZING CONDITIONS. INSTALL IN ACCORDANCE WITH RECOMMENDATIONS OF SERVING GAS SUPPLIERS. REFER TO THE NATIONAL FUEL GAS CODE.

FIGURE 14a. (A)JWSH100199 & (A)JWSH100250 Models Only

FIGURE 13.

CONNECTION OF GAS PIPE

1. When connecting gas pipe to unit, apply wrench to ange only. Note:

Do not use wrench on gas valve or gas bracket. See Figure 14a & b.

2. PERFORM THE GAS LEAK TEST ANY TIME WORK IS DONE

ON A GAS SYSTEM TO AVOID THE POSSIBILITY OF FIRE OR EXPLOSION WITH PROPERTY DAMAGE, PERSONAL INJURY OR LOSS OF LIFE.

FIGURE 14b. (A)JWSH100150 Models Only

The Gas Leak Test is performed as follows: Paint pipe connections upstream of gas control with a rich soap and water solution to test for leaks before operating main burner. Bubbles indicate gas leak. To stop leak, tighten pipe connections. After piping connections are checked, turn on main burner. With

main burner in operation, paint pipe joints (including anges), pilot gas tubing

connections and control inlet and outlet with rich soap and water solution.

Bubbles indicate gas leak. To stop leak, tighten ange screws, joints and

pipe connections. Replace part if leak can’t be stopped.

To prevent damage, care must be taken not to apply too much torque when attaching gas supply pipe to gas valve inlet.

Apply joint compounds (pipe dope) sparingly and only to the male threads of

pipe joints. Do not apply compound to the rst two threads. Use compounds resistant to the action of liqueed petroleum gases.

DISCONNECT THE APPLIANCE AND ITS MANUAL GAS SHUTOFF VALVE FROM THE GAS SUPPLY PIPING SYSTEM DURING ANY SUPPLY PRESSURE TESTING EXCEEDING 1/2 PSIG (3.45Kpa). GAS SUPPLY LINE MUST BE CAPPED WHEN DISCONNECTED FROM THE HEATER. FOR TEST PRESSURES OF 1/2 PSIG (3.45Kpa) OR LESS, THE APPLIANCE NEED NOT BE DISCONNECTED, BUT MUST BE ISOLATED FROM THE SUPPLY PRESSURE TEST BY CLOSING THE MANUAL GAS SHUTOFF VALVE.

RELIEF VALVE

This heater is equipped with an approved temperature and pressure relief valve. ASME ratings cover pressure relief. CSA ratings cover release rate with temperature actuation.

FOR SAFE OPERATION OF THE WATER HEATER, THE RELIEF VALVE(S) MUST NOT BE REMOVED OR PLUGGED.

BEFORE PLACING THE HEATER IN OPERATION, CHECK FOR GAS LEAKAGE. USE SOAP AND WATER SOLUTION OR OTHER MATERIAL ACCEPTABLE FOR THE PURPOSE OF LOCATING GAS LEAKS. DO NOT USE MATCHES, CANDLES, FLAME OR OTHER SOURCES OF IGNITION FOR THIS PURPOSE.

PURGING

Gas line purging is required with new piping or systems in which air has entered.

CAUTION

PURGING SHOULD BE PERFORMED BY PERSONS EXPERIENCED IN THIS TYPE OF GAS SERVICE. TO AVOID RISK OF FIRE OR EXPLOSION, PURGE DISCHARGE MUST NOT ENTER CONFINED AREAS OR SPACES WHERE IGNITION CAN OCCUR. THE AREA MUST BE WELL VENTILATED AND ALL SOURCES OF IGNITION MUST BE INACTIVATED OR REMOVED.

GAS METER SIZE - CITY GASES ONLY

Be sure that the gas meter has sufcient capacity to supply the full rated gas input of the water heater as well as the requirements of all other gas red

equipment supplied by the meter. If the gas meter is too small, ask the gas company to install a larger meter having adequate capacity.

GAS PRESSURE REGULATION

Main line gas pressure to the water heater should be between a maximum

10.5" (2.59Kpa) W.C. (14.0"/3.45Kpa for propane) and a minimum as shown in Table 4: that is, for Natural Gas, 4.8" (1.18Kpa) W.C. and 8.5" (2.08Kpa) for Propane Gas. The inlet gas pressure must not exceed the maximum value. A service regulator must be installed within 10' (305 cm) of unit.

WARNING

FAILURE TO INSTALL A PRESSURE REGULATOR WITHIN 10 FEET OF THE WATER HEATER CAN RESULT IN LEAKAGE OF FLUE GASES INTO THE SURROUNDING ROOM. SERIOUS PERSONAL INJURY OR DEATH COULD RESULT FROM INHALATION OF CARBON MONOXIDE GAS.

GAS VALVES

In addition to the appliance relief valve, each remote storage tank which may be used in conjunction with this appliance shall also be installed with a properly sized, rated and approved temperature (ANSI) and pressure (ASME) relief valve(s). This relief valve shall comply with the standard for relief valves for hot water supply systems. ANSI Z21.22-CSA 4.4.

You r local code aut hor ity may have oth er speci fic reli ef valve requirements.

WARNING

THE PURPOSE OF A RELIEF VALVE IS TO AVOID EXCESSIVE PRESSURE OR TEMPERATURE INTO THE STEAM RANGE, WHICH MAY CAUSE SCALDING AT FIXTURES, TANK EXPLOSION, SYSTEM OR HEATER DAMAGE. NO VALVE IS TO BE PLACED BETWEEN THE RELIEF VALVE AND THE TANK.

A DRAIN LINE MUST BE CONNECTED TO THE RELIEF VALVE TO DIRECT DISCHARGE TO A SAFE LOCATION TO AVOID SCALDING OR WATER DAMAGE. THIS LINE MUST NOT BE REDUCED FROM THE SIZE OF THE VALVE OUTLET AND MUST NOT CONTAIN VALVES OR RESTRICTIONS, NOR SHOULD IT BE LOCATED IN FREEZING AREAS. DO NOT THREAD OR CAP THE END OF THIS LINE. RESTRICTED OR BLOCKED DISCHARGE WILL DEFEAT THE PURPOSE OF THE VALVE AND IS UNSAFE. THE DISCHARGE LINE SHALL BE INSTALLED TO ALLOW COMPLETE DRAINAGE OF BOTH THE VALVE AND LINE.

WATER LINE CONNECTIONS

This manual provides detailed installation diagrams (see back section of this manual) for typical methods of application for the water heaters.

The water heater may be installed by itself, or with a separate storage tank.

CLOSED SYSTEM

CAUTION

A closed system will exist if a check valve (without bypass), pressure reducing valve (without bypass), or a water meter (without bypass) is installed in the cold water line between the water heater and street main (or well).

SHOULD OVERHEATING OCCUR OR THE GAS SUPPLY FAIL TO

WARNING

SHUT OFF, TURN OFF THE MANUAL GAS CONTROL VALVE TO THE APPLIANCE.

SYSTEM CONNECTIONS

The system installation must conform to these instructions and to the local code authority having jurisdiction. Good practice requires that all heavy piping be supported.

THERMOMETERS (Not Supplied)

Thermometers should be obtained and eld installed as shown in the

installation diagrams.

Thermometers are installed in the system as a means of detecting the temperature of the outlet water supply.

Excessive pressure may develop causing premature tank failure or intermittent relief valve operation. This type of failure is not covered by the limited warranty. An expansion tank or a similar device may be required in the inlet supply line between the appliance and the meter or valve to compensate for the thermal expansion of water under supply pressure.

If a water heater is installed in a closed water system, check local codes or contact the water supplier or local plumbing inspector on how to control this situation.

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.

2. Toxic chemicals, such as those used for boiler treatment, shall NEVER be introduced into this system.

3. This unit may never be connected to any existing heating system or

component(s) previously used with non-potab le wat er hea ti ng appliance.

4. When the system requires water for space heating at temperatures higher

than required for domestic water purposes, a tempering valve must be installed. Please refer to installation diagrams on pages 23 through 28 in back of manual for suggested piping arrangements.

THE CONTROLLER TO MALFUNCTION. A HIGH QUALITY POWER CONDITIONER MUST BE INSTALLED IF THE ABOVE CONDITIONS EXIST. MALFUNCTIONS CAUSED BY A POOR ELECTRICAL SUPPLY ARE NOT COVERED UNDER YOUR WARRANTY.

The controller is wired to the heater as shown in Figure 15. The model and rating plate provides the electrical information needed to size the complete heater branch supply.

HEATER WIRING

IF ANY OF THE ORIGINAL WIRE AS SUPPLIED WITH THE APPLIANCE MUST BE REPLACED, IT MUST BE REPLACED WITH 105°C OR ITS EQUIVALENT, EXCEPT IN THE BURNER HOUSING. IN THIS CASE USE 200°C WIRE.

THE COMPUTER CONTROL REQUIRES A SOURCE OF STABLE CLEAN ELECTRICITY FOR PROPER OPERATION. INSTALLING THE HEATER ON A BRANCH CIRCUIT THAT HAS ELECTRONIC NOISE, IS SUBJECT TO FLUCTUATIONS IN VOLTAGE LEVEL OR HAS AN APPLIANCE WHICH GENERATES EMF OF RFI INTERFERENCE CAN CAUSE

All electrical work must be installed in accordance with the Canadian Electrical Code, CSA C22.1 and local requirements.

When installed, the appliance must be electrically grounded in accordance with local codes or, in the absence of local codes, with the Canadian Electrical Code, CSA C22.1.

DO NOT ENERGIZE THE BRANCH CIRCUIT BEFORE THE HEATER TANK IS FILLED WITH WATER.

NOTE: This controller is Polarity Sensitive. If the Hot and Neutral Supply

Voltage is reversed, the controller will not sense ame. Verify polarity before

connecting the unit.

FIGURE 15.

USING THE ELECTRONIC CONTROLLER

1. Overview

Interaction with the water heater controller is done through an up, a down, and three operation buttons. These buttons are illustrated to the right. Operation

of the three lower buttons is dened immediately above them on the screen. The [UP] and [DN] buttons are used to navigate through the menus and make

adjustments to the water heater.

While the water heater is operating, the user interface will display the desktop screen (if there are no active faults or warnings). An example of this screen

is shown to the right. The rst temperature on this screen is the temperature of the water inside the tank. The second temperature on this screen is the

Operating Set Point. The Operating Set Point is the temperature at which the water heater will maintain the water inside the tank. The third line on the screen is a text description of the Operational State of the water heater (please see Operating States for more details).

The following status icons describe graphically operational details of the heater. The legend of all the status icons is listed below.

2. Operating States

In the main desktop screen, there are some specic Operating States that are indicated on the status line. These are summarized below:

3. Adjusting the Operating Set Point

The Operating Set Point of this water heater determines the regulated temperature for the water in the tank. This parameter is adjusted in the Temperature menu. Items in this menu allow you to monitor different temperature readings in the tank along with adjusting the Operating Set Point and Differential.

ACTION: From the desktop screen, press Menu.

DISPLAY:

ACTION: From the Main Menu, press Select to enter the "Temperatures" screen.

DISPLAY:

ACTION:

Press Change then use the UP and DOWN buttons to change the Set Point.

Note: This procedure can also be used to change the Differential. The Tank, Upper and Lower Temperatures are not user changeable. They are determined by the temperature probes on the heater.

DISPLAY:

ACTION: Press Update to accept the change or Cancel to reset it.

DISPLAY:

4. Changing the Display Units

The display interface to the heater has the option of selecting between degrees Fahrenheit and degrees Celsius for temperature displays. This can be found in the “Display Settings” menu. Also in this menu, you may adjust how the backlight operates and the contrast of the LCD screen.

ACTION:

From the Main Menu, press the DOWN button to highlight "Display Settings" then press Select.

DISPLAY:

There are two types of conditions that can occur during operation. These are Warnings and Faults:

• Warnings: This is a non-safety related condition that the control has detected that may cause the water heater to operate in a less than optimal condition, but does not pose a safety concern.

NOTE: When these conditions occur, continued heating cycles will continue and the heater will attempt to regulate the water in the tank to the Operating Set Point.

Example of a Warning:

ACTION:

Use the UP and DOWN buttons to highlight the desired setting. Then press Change. Again, use the UP and DOWN buttons to scroll through the options for that setting.

DISPLAY:

ACTION: Press Update to accept the change or Cancel to reject it.

DISPLAY:

• Faults: This is a safety related condition that has been detected by the heater.

NOTE: When these conditions occur, the water heater will not continue any further heating cycles and the water will no longer be heated until the condition is corrected and, in most cases, power has been cycled.

Example of a Fault:

Advanced Diagnostics Information

When a fault or warning has been declared, advanced information can be found in the control. By pressing the Advanced button, detailed information can be found regarding diagnosing and resolving the problem.

WARNING: Usage of the Advanced information requires ability equivalent to that of a licensed tradesmen in the eld involved.

5. Fault and Warning Conditions

This water heater is equipped with electronic controls that have the ability to monitor almost all aspects of the water heater operation. In the case that there is an undesirable or unsafe condition that occurs, the water heater controls will detect this condition and determine the appropriate action. Part of this is displaying the information on the LCD in plain text that accurately describes the condition and diagnostics information that can be used to correct the issue.

6. Access to the Current Fault or Warning

When a fault or warning has been detected by the control, it will automatically be displayed on the screen and the back light will blink. If you choose to leave the current fault or warning by pressing the Back key, you can always return to the fault screen through the menu.

ACTION: To get to the current fault information screen, press Menu.

DISPLAY:

ACTION: Press the DOWN button to highlight "current Fault" and press Select.

DISPLAY:

7. Viewing the Fault History

The controller for this water heater will store a history of ten of the last Fault and Warning conditions that occurred. This is stored in the Fault History. Along with all the information about the fault, including a estimate time of when the fault occurred, information regarding the advanced diagnostics for that fault can be accessed at any time.

ACTION: Press the DOWN button for more information.

DISPLAY:

ACTION: Press the DOWN key to scroll through the fault history. If you select a

specic fault or warning, you may press the VIEW button to view details regarding this fault.

DISPLAY:

ACTION: Press the DOWN button for more information.

DISPLAY:

PRIOR TO START UP

REQUIRED ABILITY

Before attempting start-up, thoroughly study and familiarize yourself with

the exact sequence of operation and all other details on the specic heater

being used.

8. Viewing Information About the Heater

The electronic control for this water heater monitors many different aspects of the water to ensure safe and optimal operation. Much of the information

monitored is available to view in two areas of the control. The rst is the

"Heater Status" and; the second is "Heater Information." These items can be selected through the main menu in the same fashion as described above. In these menus, detailed information about the water heater and the current

status of specic conditions can be found.

Be certain that the water heater is full of water, that air is purged from all lines, there are no leaks (gas and water), and all inlet water lines are open.

The following test equipment should be on hand (all test equipment must be acclimated to ambient temperature before calibration and use.)

– Two U-tube manometers or calibrated pressure gages that can read

0-10" (0-2.5Kpa) and 0-35" (0-8.7Kpa) W.C. pressure gauges.

The power burner is equipped with an ignition system which automatically

sequences prepurge and ignition, senses and ignites main burner ame and

sequences burner operation. Heater is equipped with an ignition control which locks out after three unsuccessful ignition attempts. Familiarize yourself with the sequence of operation of this unit prior to start-up.

• Attach a gas pressure gauge or manometer to the upstream side of

main gas cock and a gas pressure gauge or manometer to the manifold pressure tap.

• You are now ready to begin the burner start-up procedure.

OPERATING INSTRUCTIONS

IMPORTANT

IT IS RECOMMENDED THAT A QUALIFIED SERVICE TECHNICIAN PERFORM THE INITIAL FIRING OF THE HEATER. AT THIS TIME THE USER SHOULD ASK THE TECHNICIAN ANY QUESTIONS IN REGARD TO THE OPERATION AND MAINTENANCE OF THE UNIT.

CAUTION

BEFORE PROCEEDING WITH THE OPERATION OF THE UNIT, MAKE SURE HEATER AND SYSTEM ARE FILLED WITH WATER AND ALL AIR IS EXPELLED FROM HEATER AND PIPING.

NEVER OPERATE THE HEATER WITHOUT FIRST BEING CERTAIN IT IS FILLED WITH WATER AND A TEMPERATURE AND A PRESSURE RELIEF VALVE IS INSTALLED IN THE RELIEF VALVE OPENING OF THE HEATER. DO NOT ATTEMPT TO OPERATE HEATER WITH COLD WATER INLET VALVE CLOSED.

FILLING:

1. Close the heater drain valve.

2. Open a nearby hot water faucet to permit the air in the system to escape.

3. Fully open the cold water inlet pipe valve allowing the heater and piping

to be lled.

4. Close the hot water faucet as water starts to ow.

5. The heater is ready to be operated.

5. Check the vent system seams and joints and ensure that there is no

discharge of ue products into the room.

6. Check the input rate.

For appliance installation locations with elevations above 6500 feet (1982 meters) refer to HIGH ALTITUDE INSTALLATIONS section of this manual.

a. Attach a pressure gauge (manometer) to the manifold pressure tap (Figure 16) and refer to Table 4, page 20 for correct pressure.

b. Use this formula to “clock” the meter. Be sure other gas consuming appliances are not operating during this interval.

3600 T

Should it be necessary to adjust the gas pressure to the burner, to obtain the full input rate, the steps below should be followed:

T = Time in seconds to burn 1 cubic foot of gas. (With a stopwatch read

H = Heating value of gas (in Btu’s per cubic foot of gas). Btuh = Actual heater input rate, in Btuh.

EXAMPLE: (Using (A)JWSH100199N Model)

X H = Btuh

the gas meter and measure the amount of time required for the heater to consume 1 cubic foot of gas.)

THE MAIN MANUAL GAS SHUTOFF VALVE MUST HAVE BEEN CLOSED FOR AT LEAST FIVE (5) MINUTES. THIS WAITING PERIOD IS AN IMPORTANT SAFETY STEP. ITS PURPOSE IS TO PERMIT GAS THAT MIGHT HAVE ACCUMULATED IN THE COMBUSTION CHAMBER TO CLEAR. IF YOU DETECT GAS AT THE END OF THIS PERIOD, DO NOT PROCEED WITH LIGHTING. RECOGNIZE THAT GAS ODOR, EVEN IF IT SEEMS WEAK, MAY INDICATE THE PRESENCE OF ACCUMULATED GAS SOMEPLACE IN THE AREA WITH A RISK OF FIRE OR EXPLOSION. SEE THE FRONT PAGE FOR STEPS TO BE TAKEN.

DO NOT USE THIS HEATER IF ANY PART HAS BEEN UNDER WATER. IMMEDIATELY CALL A QUALIFIED SERVICE TECHNICIAN TO INSPECT THE HEATER AND TO REPLACE ANY PART OF THE CONTROL SYSTEM AND ANY GAS CONTROL WHICH HAS BEEN UNDER WATER.

LIG HT THE UNIT IN AC COR DANC E WI TH T HE O PER AT ING INSTRUCTIONS LABEL ATTACHED TO THE HEATER.

THESE INSTRUCTIONS ARE REPEATED IN THE LIGHTING AND OPERATING LABEL ILLUSTRATION ON PAGE 20 IN THIS MANUAL.

ADJUSTMENT PROCEDURE

INITIAL START-UP - (A)JWSH100150 MODEL

Main line gas pressure to the water heater for natural gas should be between a maximum of 10.5" (2.59Kpa for natural gas) W.C. (14.0"/3.45Kpa for propane) and a minimum as shown in Table 4: that is, for Natural Gas, 4.8 (1.18Kpa) W.C. and 8.5" (2.08Kpa) for Propane Gas. The inlet gas pressure must not exceed the maximum value. A service regulator must be installed within 10' (305 cm) of the unit.

1. Check gas line pressure with a manometer.

2. Check manifold pressure (see Table 4, page 20) using a pressure

gauge (manometer) connected to the manifold pressure tap on the gas control valve.

If full rate adjustment is required, remove cover screw from top of the gas control valve.

Using a small screwdriver, turn adjusting screw clockwise or counterclockwise

for natural gas and 10.0" W.C. (2.5 Kpa) for L.P. Gas.

3. Cycle the burner on and off several times to check its operation.

4. Check the operation of the limit and operating controls.

to decrease gas pressure to obtain 4.0" (1 kPa)

to increase

T = 25.25 seconds H = 1050 Btu/ft. BTUH = ?

For high altitude installations, compare result to the derated input required for the elevation at the installation location.

c. Remove the pressure regulator cover screw and adjust the pressure by

turning the adjusting screw with a small screwdriver. Do not exceed 4.0" (1 kPa) natural gas models and 10.0" W.C. (2.5Kpa) on the propane models.

Clockwise to increase gas pressure and input rate.

Counterclockwise to decrease gas pressure and input rate.

d. “Clock” the meter as in step (b) above.

e. Repeat steps (c) and (d) until the specied input rate is achieved.

f. Turn the manual gas valve to “OFF”. Replace the pressure regulator cover screw. Remove the pressure gauge or manometer from the manifold pressure tap. Replace the set screw in the manifold pressure tap. If the gas pressure regulator cannot be adjusted to give the full

input rating with sufcient gas pressure at the valve, check to ensure the unit is equipped with the correct orice.

3600

X 1050 = 150,000 Btuh (44 Kw)

25.25

ADJUSTMENT PROCEDURE

INITIAL START-UP - (A)JWSH100199 & (A)JWSH100250

Main line gas pressure to the water heater for natural gas should be between a maximum of 10.5" (2.59Kpa for natural gas) W.C. (14.0"/3.45Kpa for propane) and a minimum as shown in Table 4: that is, for Natural Gas 4" (.98Kpa) W.C. and 9.0" (1.97Kpa) for Propane Gas. The inlet gas pressure must not exceed the maximum value. A service regulator must be installed within 10' (305 cm) of the unit.

The (A)JWSH100199 and (A)JWSH100250 models incorporate a new gas control, which operates at 0"W.C. (0kPa) for both natural and propane gas.

These models are congured prior to being shipped from the factory and

no adjustments are necessary prior to startup. The controller monitors the

air-ow and makes adjustments to the fan speed which in effect controls the amount of gas ow. Therefore, the unit will self-adjust to acquire the

correct amount of input.

Once the unit is installed and lled with water and the inlet pressures conrmed, simply turn the switch "on" and observe operation. Cycle the unit

"off" and "on" several times to ensure proper operation.

UNDER NO CIRCUMSTANCES SHOULD THE INPUT EXCEED THE RATE

WARNING

SHOWN ON THE HEATER RATING PLATE. OVER FIRING COULD RESULT IN DAMAGE OR SOOTING OF THE HEATER.

CATHODIC PROTECTION

CAUTION

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 a hot water faucet be opened for several minutes 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 ow. There should be no smoking or open ame near the faucet at the time it is open.

PRECAUTIONS

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

1. FLOODING TO OR ABOVE THE LEVEL OF THE BURNER OR CONTROLS

2. EXTERNAL FIRING

3. DAMAGE

4. FIRING WITHOUT WATER

5. SOOTING

NEVER OPERATE THE HEATER WITHOUT FIRST BEING CERTAIN IT IS FILLED WITH WATER AND A TEMPERATURE AND PRESSURE RELIEF VALVE IS INSTALLED IN THE RELIEF VALVE OPENING OF THE HEATER.

SHOULD OVERHEATING OCCUR OR THE GAS SUPPLY FAIL TO SHUT OFF, TURN OFF THE MANUAL GAS CONTROL VALVE TO THE APPLIANCE.

GENERAL INFORMATION

POWER BURNER

The initial start-up procedure of the unit is provided on page 18.

HIGH ALTITUDE INSTALLATIONS

WARNING

THE (A)JWSH100199 AND (A)JWSH100250 HEATERS ARE CERTIFIED FOR USE WITHOUT MODIFICATION FOR ALTITUDES UP TO 10,100 ft. (3078 m). THE (A) JWSH100150 HEATERS ARE CERTIFIED FOR USE WITHOUT MODIFICATION FOR ALTITUDES UP TO 7,700 ft. (2347 m). INSTALLATIONS ABOVE THESE ALTITUDES MAY REQUIRE REPLACEMENT OF THE BURNER ORIFICE. CALL THE TECHNICAL CENTER @ (888) 479-8324 FOR REQUIREMENTS.

Some gas utility companies derate their gas for altitude, making it unnecessary

to install high altitude orices. Call the local gas or utility company to verify

BTU content.

Due to the input rating reduction at high altitudes, the output rating of the appliance is also reduced and should be compensated for in the sizing of the equipment for applications.

MAINTENANCE

GENERAL

KEEP APPLIANCE AREA CLEAR AND FREE FROM COMBUSTIBLE MATERIALS, GASOLINE AND OTHER FLAMMABLE VAPORS AND LIQUIDS. (SEE WARNING ON PAGE 5, LOCATING THE HEATER).

Water heater maintenance includes periodic tank ushing and cleaning, and

removal of lime scale. The unit should be inspected and adjusted to maintain proper combustion. Refer to the following table. A periodic inspection of the venting system should be made. Where used, the water circulating pump should be oiled.

MAINTENANCE SCHEDULE

Following are the instructions for performing some of the recommended maintenance. Unit inspection and adjustment should be performed by a competent technician.

TABLE 5

COMPONENT OPERATION INTERVAL REQUIRED

The sequence of operation of the unit is provided on page 15.

It is important to note that the controller has a reset button on the control box, Figure 1. The reset button is a safety device and would not normally be used.

HIGH LIMIT

The high limit (not adjustable) is factory set to cutout at 202°F (94°C). The controller must be manually reset by depressing the reset button on front of the control when water temperature drops to below 160°F (71°C).

TABLE 4

Tank Sediment Monthly Flushing Removal

Tank Lime Scale Semi UN-LIME Removal Annually Delimer

Relief Valve Inspect Semi Annually

Clean Inlet Blower Screen and As Required Soft Brush Blower Wheel

Vent System Inspect Every 3 Joints should Months be sealed

FOR YOUR SAFETY READ BEFORE OPERATING

WARNING:

explosion may result causing property damage, personal injury or loss of life.

If you do not follow these instructions exactly, a fire or

OPERATING INSTRUCTIONS

TURN OFF GAS TO APPLIANCE

(A)JWSH100150 ONLY.

FOR YOUR SAFETY READ BEFORE OPERATING

WARNING:

explosion may result causing property damage, personal injury or loss of life.

If you do not follow these instructions exactly, a re or

OPERATING INSTRUCTIONS

TURN OFF GAS TO APPLIANCE

(A)JWSH100199 & (A)JWSH100250 MODELS ONLY.

FLUSHING

1. Turn off the heater electrical disconnect switch.

2. Open a hot water faucet until the water runs cool and then close the hot

water faucet.

3. Open the drain valve and allow water to ow until it runs clean.

4. Close the drain valve when nished ushing.

5. Turn on the heater electrical disconnect switch.

DRAINING

The heater must be drained if it is to be shut down and exposed to freezing temperatures. Maintenance and service procedures may also require draining the heater.

1. Turn off the heater electrical disconnect switch.

2. Open a nearby hot water faucet until the water runs cool.

3. Close the cold water inlet valve to heater.

4. Open the heater drain valve.

5. If the heater is being drained for an extended shutdown, it is suggested the drain valve be left open during this period.

• Follow FILLING instructions when restoring hot water service.

SEDIMENT REMOVAL

FIGURE 16.

To dissolve and remove the more stubborn mineral deposits, UN•LIME®

Professional Delimer should be used.

UN•LIME® Professional Delimer is an easy to handle patented food grade acid formulated specically for lime scale removal from all types of water

using equipment. Available in 1 gallon (3.8L) (part no. 4763) and 5 gallon (19L) (part no. 4813) sizes. Hydrochloric base acids are not recommended for use on glass-lined tanks.

Waterborne impurities consist of the particles of soil and sand which settle out and form a layer of sediment on the bottom of the tank.

For convenience, sediment removal and lime scale removal should be performed at the same time.

LIME SCALE REMOVAL

The amount of calcium carbonate (lime) released from water is in direct proportion to water temperature and usage. The higher the water temperature or water usage, the more lime deposits are dropped out of the water. This is the lime scale which forms in pipes, heaters and on cooking utensils.

Lime accumulation not only reduces the life of the equipment but also reduces

efciency of the heater and increases fuel consumption.

The usage of water softening equipment greatly reduces the hardness of the water. However, this equipment does not always remove all of the hardness (lime). For this reason it is recommended that a regular schedule for deliming be maintained.

The depth of lime buildup should be measured periodically. Heaters will have about 3" (7.6cm) of lime buildup when the level of lime has reached the bottom of the cleanout opening or about 1" (2.5cm) of lime buildup if it has reached the drain valve opening. A schedule for deliming should be set up, based on the amount of time it would take for a 1" (2.5cm) buildup of lime.

Example 1:

Initial inspection shows 1/2" (1.3cm) of lime accumulation. Therefore, the

heater can be delimed once a year.

Example 2 :

Initial inspection shows 2" (5cm) of lime accumulation. Therefore, the

heater should be delimed every 3 months.

Form No. 4800, entitled “Why, When and How”, describes tank cleaning

methods and materials. UN•LIME and the booklet may be obtained through

the tech. center.

The cleanout opening is shown in Figure 16. To clean heater through cleanout opening, proceed as follow:

1. Turn off the water heater electrical disconnect switch and open a nearby hot water faucet until the water runs cool, draining the water heater completely.

2. Remove outer cover plate from lower side of heater jacket.

3. Remove cover from cleanout opening.

4. Remove lime, scale or sediment using care not to damage the glass-lining.

5. Inspect cleanout plate gasket: If new gasket is required, replace with kit # 9004099215.

6. Install cleanout plate. Be sure to draw plate up tight by tightening screws securely.

7. Close drain valve, open water inlet line and turn on the water heater electrical disconnect switch.

8. Check for water leakage.

9. Replace outer jacket cover plate.

POWERED ANODE SYSTEM

Sediment and lime scale removal may be accomplished through the cleanout opening furnished on the heater, see Figure 25. The heater must be drained, see DRAINING, before removing cleanout cover on tank.

The (A)JWSH heaters are factory equipped with a powered anode system. The anodes are of a permanent design and do not need replacing unless damaged.

DRAIN VALVE AND ACCESS PANELS

The heaters are equipped with a 3/4" drain valve.

to build until the relief valve actuation pressure is equaled. Then, the relief valve will open, allowing some water to escape, slightly lowering the pressure.

An access panel covers the cleanout opening in the tank which is sealed by

a gasket and cover, gure 25.

RELIEF VALVE

At least twice a year, the temperature and pressure relief valve should be checked to ensure that it is in operating condition. To check the relief valve, lift the lever at the end of the valve several times. The valve should seat properly and operate freely.

If water does not ow, remove and inspect for obstructions or corrosion.

Replace with a new valve of the recommended size as necessary. Inspection of the valve should be performed at least every three years. Do not attempt to repair the valve, as this could result in improper operation and a tank explosion. In areas with poor water conditions, it may be necessary to inspect the T&P valve more often than every three years.

CAUTION

BEFORE MANUALLY OPERATING THE VALVE, MAKE SURE THAT A DRAIN LINE HAS BEEN ATTACHED TO THE VALVE TO DIRECT THE DISCHARGE TO AN OPEN DRAIN. FAILURE TO TAKE THIS PRECAUTION COULD MEAN CONTACT WITH EXTREMELY HOT WATER PASSING OUT THE VALVE DURING THIS CHECKING OPERATION.

If the temperature and pressure relief valve on the heater discharges periodically or continuously, it may be due to thermal expansion of water in a closed water supply system, or, it may be due to a faulty relief valve.

Thermal expansion is the normal response of water when it is heated. In a closed system, thermal expansion will cause the system pressure

Contact your water supplier or local plumbing inspector on how to control this situation.

Two common corrections are listed in the Checklist and Service Information which appears later in this manual.

ABOVE ALL, DO NOT PLUG THE TEMPERATURE AND PRESSURE RELIEF VALVE. THIS IS NOT A SOLUTION AND CAN CREATE A HAZARDOUS SITUATION.

CIRCULATING PUMP

The water heating system may include a circulating pump. Where used, it should be lubricated as directed by the circulator manufacturer.

VENT SYSTEM

Examine the vent system every 3 months. Points of inspection are as follows:

1. Check for obstructions and/or deterioration of vent piping and vent hood. Replace immediately where needed.

2. Vent pipe and vent hood screen should be cleaned of foreign material and soot. The screen is located inside the vent hood outlet and is accessible from the outside of the hood. Do not reach inside the vent hood when the heater is in operation.

3. Check all vent system connections for leakage and reseal as required using Hi Temp Silicone sealer or equivalent.

ONE TEMPERATURE - ONE HEATER VERTICAL STORAGE TANK FORCED CIRCULATION

CAUTION: IF THE PL UM BING REQUIRES THE USE OF PIPES WITH DISSIMILAR MATERIAL (FOR EXAMPLE, STEEL AND COPPER), USE DIELECTRIC UN IO NS TO PREVENT AN ELECTRO-GALVANIC ACTION BETWEEN THE PIPING COMPONENTS WITH DISSIMILAR MATERIALS.

INSTALLATION DIAGRAMS

WITH OR WITHOUT BUILDING RECIRCULATION

CAUTION: IF BUILDING COLD

WATER SUPPLY HAS A BACKFLOW PREVENTER, CHECK VALVE OR WATER METER WITH CHECK VALVE PROVISIONS FOR THERMAL EXPANSION OF WATER IN THE HOT WATER SYSTEM MUST BE PROVIDED

NOTE: CONNECT RETURN LIN E F RO M HOT WATER CIRCULATING LOOP (IF USED) TO COLD WATER INLET LINE.

* PIPE TO OPEN DRAIN

IN STALL IN ACCORDANCE WITH LOCAL CODES

ONE TEMPERATURE - ONE HEATER HORIZONTAL STORAGE TANK

FORCED CIRCULATION WITH OR WITHOUT BUILDING RECIRCULATION

DANGER

TEMPERATURE SETTING SHOULD NOT EXCEED SAFE TEMPERATURE AT FIXTURES. SEE WATER TEMPERATURE CONTROL WARNING ON PAGE

3. IF HIGHER PREHEAT TEMPERATURES ARE NECESSARY TO OBTAIN ADEQUATE BOOSTER OUTPUT, ADD AN ANTI-SCALD VALVE FOR HOT WATER SUPPLIED TO FIXTURES.

*PIPE TO OPEN DRAIN

INSTALL IN ACCORDANCE WITH LOCAL CODES

CAUTION: IF THE PLUMBING REQUIRES THE USE OF PIPES WITH DISSIMILAR MATERIAL (FOR EXAMPLE, STEEL AND COPPER), USE DIELEC TRIC UNIONS TO PREVENT AN ELECTROGALVANIC ACTION BETWEEN THE PIPING COMPONENTS WITH DISSIMILAR MATERIALS.

TWO TEMPERATURE - ONE HEATER HIGH TEMPERATURE

WITH OR WITHOUT BUILDING RECIRCULATION

DANGER

TEMPERATU RE SETTI NG SHOUL D NOT EX CEED SAFE TEMPERATURE AT FIXTURES. SEE WATER TEMPERATURE CONTROL WARNING ON PAGE 3. IF HIGHER PREHEAT TEMPERATURES ARE NECESSARY TO OBTAIN ADEQUATE BOOSTER OUTPUT, ADD AN ANTI-SCALD VALVE FOR HOT WATER SUPPLIED TO FIXTURES.

CAUTION: IF BUILDING COLD WATER SUPPLY HAS A BACK-FLOW PREVENTER, CHECK VALVE OR WATER ME TE R WITH CH EC K VALVE PRO VI SI ONS FOR THERMAL EXPANSION OF WATER IN THE HOT WATER SYSTEM MUST BE PROVIDED.

PIPE RELIEF VALVE TO OPEN DRAIN.

NOTE: I F T EM PE RED W AT ER I S RECIRCULATED, RETURN LINE SHOULD BE CONNECTED AT POINT “A”.

INSTALL IN ACCORDANCE WITH LOCAL CODES.

CAUTION: IF THE PLU MB IN G REQUIRES THE USE OF PIPES WITH DISSIMILAR MATERIAL (FOR EXAMPLE, STEEL AND COPPER), USE DIELEC TRIC UNIONS TO PREVENT AN ELECTRO-GALVANIC ACTION BETWEEN THE PIPING COMPONENTS WITH DISSIMILAR MATERIALS.

TWO TEMPERATURE - TWO HEATERS HIGH TEMPERATURE

WITH OR WITHOUT BUILDING RECIRCULATION

TWO TEMPERATURE - THREE HEATERS (TWO PRE-HEATERS/ONE BOOSTER HEATER)

WITH OR WITHOUT BUILDING RECIRCULATION

CAUTION: IF THE PLU MB IN G

REQUIRES THE USE OF PIPES WITH DISSIMILAR MATERIAL (FOR EXAMPLE, STEEL AND COPPER), USE DIELEC TRIC UNIONS TO PREVENT AN ELECTRO-GALVANIC ACTION BETWEEN THE PIPING

MUST BE IDENTICAL HEATERS

COMPONENTS WITH DISSIMILAR MATERIALS.

FOR MULTIPLE HEATER INSTALLATION SEE MANIFOLD KIT SPECIFICATIONS, PAGE 33.

CAUTION: IF BUILDING COLD WATER SUPPLY HAS A BACK-FLOW PREVENTER, CHECK VALVE OR WATER METER WITH CHECK VALVE PROVISIONS FOR THERMAL EXPANSION OF WATER IN THE HOT WATER SYSTEM MUST BE PROVIDED.

TEMPERATURE SETTING SHOULD NOT EXCEED SAFE TEMPERATURE

DANGER

AT FIXTURES. SEE WATER TEMPERATURE CONTROL WARNING ON PAGE 3. IF HIGHER PREHEAT TEMPERATURES ARE NECESSARY TO OBTAIN ADEQUATE BOOSTER OUTPUT, ADD AN ANTI-SCALD VALVE FOR HOT WATER SUPPLIED TO FIXTURES.

TWO TEMPERATURE - TWO HEATERS (ONE PRE-HEATER/ONE BOOSTER HEATER)

WITH OR WITHOUT BUILDING RECIRCULATION

TEMPERATURE SETTING SHOULD NOT EXCEED SAFE TEMPERATURE

DANGER

* PIPE RELIEF VALVE TO OPEN DRAIN

** 140°F (60°C) TO 150°F (66°C) SHOULD BE MAXIMUM WATER TEMPERATURE MAINTAINED IN THE PRE-HEATERS.

120°F (49°C) SHOULD BE THE MINIMUM TEMPERATURE OF WATER IN THE PRE- HEATERS.

CONNECT CIRCULATING LINE FROM FIXTURES, IF USED, TO COLD WATER SUPPLY LINE OF PRE-HEATER.

CONNECT CIRCULATING LINE OF 180°F (82°C) OR BOOSTED WATER, IF USED, TO INLET WATER LINE TO BOOSTER.

INSTALL IN ACCORDANCE WITH LOCAL CODES.

CAUTION: IF THE PLUMBING REQUIRES THE USE OF PIPES WITH DISSIMILAR MATERIAL (FOR EXAMPLE, STEEL AND COPPER), USE DIELECTRIC UNIONS TO PREVENT AN ELECTRO-GALVANIC ACTION BETWEEN THE PIPING COMPONENTS WITH DISSIMILAR MATERIALS.

TWO TEMPERATURE - ONE HEATER HIGH TEMPERATURE

WITH RECIRCULATION OF SANITIZING LOOP

CAUTION: IF THE PLUMBING REQUIRES

THE USE OF PIPES WITH DISSIMILAR MATERIAL (FOR EXAMPLE, STEEL AND COPPER), USE DIELECTRIC UNIONS TO PREVENT AN ELECTRO-GALVANIC ACTION BETWEEN THE PIPING COMPONENTS WITH DISSIMILAR MATERIALS.

DANGER

TEMPERATURE SETTING SHOULD NOT EXCEED SAFE TEMPERATURE AT FIXTURES. SEE WATER TEMPERATURE CONTROL WARNING ON PAGE 3. IF HIGHER PREHEAT TEMPERATURES ARE NECESSARY TO OBTAIN ADEQUATE BOOSTER OUTPUT, ADD AN ANTI-SCALD VALVE FOR HOT WATER SUPPLIED TO FIXTURES.

CAUTION: IF BUILDING COLD WATER SUPPLY HAS A BACK-FLOW PREVENTER, CHECK VALVE OR WATER METER WITH CHECK VALVE PROVISIONS FOR THERMAL EXPANSION OF WATER IN THE HOT WATER SYSTEM MUST BE PROVIDED.

*PIPE RELIEF VALVE TO OPEN DRAIN

INSTALL IN ACCORDANCE WITH LOCAL CODES

NOTE 1: TOGGL E SWITCH CONT ROLS 180° F (82°C ) WATE R CIRCULATION. INSTALL ON OR CLOSE TO DISHWASHER. TOGGLE SWITCH MUST BE CLOSED (ON) DURING THE RINSE OPERATION AND OPEN (OFF) WHEN DISHWASHER IS NOT OPERATING OR WHEN ON LONG STANDBY.

NOTE 2: INSTALL LINE TEMPERATURE CONTROL IN AN UNINSULATED TEE BEYOND THE DISHWASHER TAKEOFF IN THE SANITIZING LOOP. CONTROL SHOULD BE SET AT 185°F (85°C).

NOTE 3: ADJUST PLUG COCK SO THE SANITIZING LOOP FLOW RATE DOES NOT CAUSE UNNECESSARY TURBULENCE IN THE TANK.

NOTE 4: IF TEMPERED WATER IS RECIRCULATED, RETURN LINE SHOULD BE CONNECTED AT POINT A.

MANIFOLD KITS

Precision cut type “L” all copper manifold kits assure water ow balance of all units. Without this balance, the full water heating and storage potential of the system cannot be achieved. Plus, the units with the higher water ow may have a shortened life.

Dimensions shown are for minimum space occupied by the water heaters assemblies.

Space for the venting system and unit servicing must be added.

Kit # 9006680005

CAUTION: IF THE PLUMBING REQUIRES

THE USE OF PIPES WITH DISSIMILAR MATERIAL (FOR EXAMPLE, STEEL AND COPPER), USE DIELECTRIC UNIONS TO PREVENT AN ELECTRO-GALVANIC ACTION BETWEEN THE PIPING COMPONENTS WITH DISSIMILAR MATERIALS.

Kit # 9006681005

Kit # 9006682005

CHECKLIST AND SERVICE INFORMATION

IMPORTANT

The installer may be able to observe and correct certain problems which might arise when the unit is put into operation or when it is re-fired after a prolonged shutdown. HOWEVER, it is recommended that only qualified servicemen, using appropriate test equipment, be allowed to service the heater.

BE SURE TO TURN OFF THE ELECTRICITY WHENEVER POSSIBLE OR APPROPRIATE WHILE CHECKING EQUIPMENT.

WARNING

FAILURE TO FOLLOW THESE INSTRUCTIONS CAN RESULT IN SERIOUS PERSONAL INJURY OR DEATH.

CAUTION: LABEL ALL WIRES PRIOR TO DISCONNECTION WHEN SERVICING CONTROLS. WIRING ERRORS CAN CAUSE IMPROPER AND DANGEROUS OPERATION.

VERIFY PROPER OPERATION AFTER SERVICING.

BURNER OPERATIONAL PROBLEMS

1. Refer to TROUBLESHOOTING.

NOT ENOUGH OR NO HOT WATER

1. Be certain the electrical disconnect switch serving the water heater is in the ON position.

2. Check the fuses.

• The electrical disconnect switch usually contains fuses.

3. The capacity of the heater may have been exceeded by a large demand for hot water.

• Large demands require a recovery period to restore water

temperature.

4. Colder incoming water temperature will lengthen the time required to heat water to the desired temperature.

• If the heater was installed when incoming water temperature was

warm, colder water creates the effect of less hot water.

5. Look for hot water wastage and leaking or open hot water faucets.

6. Sediment or lime scale may be affecting water heater operation. Refer to MAINTENANCE for details.

7. Burner may not be ring at proper rate.

• Check gas pressure. Adjust to obtain required manifold pressure.

8. Burner fan wheel may be dirty.

• Clean fan wheel with a stiff brush.

9. Condensate hose may be blocked where it connects to the exhaust elbow.

• Verify the condensate drains from the unit without restriction.

2. Some of the electrical components of the water heater make sounds which are normal.

• Contacts click or snap as the heater starts and stops.

• Transformers often hum.

WATER LEAKAGE IS SUSPECTED

1. Check to see if the water heater drain valve is tightly closed. Also check the cleanout opening for leakage.

2. The apparent leakage may be condensation which forms on cool surfaces of the heater and piping.

3. If the outlet of the relief valve is leaking it may represent:

• Excessive water pressure.

• Excessive water temperature.

• Faulty relief valve.

Excessive water pressure is the most common cause of relief valve leakage. It is often caused by a “closed system”. If a check valve is in the inlet system it will not permit the expanded hot water volume to equalize pressure with the main. The relief valve must release this water or the water heater or plumbing system will be damaged. Refer to MAINTENANCE-RELIEF VALVE section in this manual.

When such a condition is encountered, local codes or inspection agency should be consulted to determine which system is acceptable in your area. See CLOSED SYSTEM section in this manual also.

TROUBLE-SHOOTING

1. Verify that the allowable vent length has not been exceeded and that the

blower inlet screen has been removed if direct venting.

2. Verify that the condensation, which WILL be present in the heater and

exhaust vent, will drain.

3. Check supply wire polarity - hot to hot and neutral to neutral and no

"stray" current in neutral.

4. Heater is properly grounded.

Checking these four (4) items rst will often result in a timely solution to the

service call.

WARNING

JUM P ING O U T COM PONE N TS AND/O R CIRC U ITS D U RING TROUBLESHOOTING CAN CAUSE SERIOUS PROBLEMS WITH THE UNIT’S OPERATING SEQUENCE AND IGNITION SAFETY. IF YOU DO NOT HAVE THE PROPER TEST EQUIPMENT, I.E. A VOLT-OHM METER AND A MICROAMMETER, DO NOT ATTEMPT TO TROUBLESHOOT OR REPAIR STATE EQUIPMENT.

ALTERING THE CONTROLLER AND/OR CONTROLLER WIRING IN ANY WAY COULD RESULT IN INTERNAL DAMAGE TO THE MODULE CIRCUITS, POSSIBLY ALTERING THE IGNITION SEQUENCE ALLOWING GAS VALVES TO OPEN BEFORE THE HOT SURFACE IGNITER IS UP TO IGNITION TEMPERATURE.

NOTE: ANY BYPASS OR ALTERATION OF THE UNITS SAFETIES WILL RESULT IN VOIDING THE APPLIANCE WARRANTY.

Before performing any troubleshooting familiarize yourself with the particular appliance.

WATER IS TOO HOT

1. Refer to WATER TEMPERATURE CONTROL.

WATER HEATER MAKES SOUNDS

1. Sediment or lime scale accumulations cause rumbling and pounding noises when the heater is operating.

• The sounds are normal, however, the tank bottom should be cleaned.

Refer to MAINTENANCE for details.

Refer to the SEQUENCE OF OPERATION and the connection diagram located on page 15 before continuing.

Make sure the appliance is connected to a 120V AC power supply, manual gas valve is in the ON position, and all electrical connections are secure before continuing to troubleshoot this appliance.

CAUTION

THE WATER HEATER IS POLARITY SENSITIVE. BEFORE APPLYING ELECTRICITY TO THIS HEATER BE CERTAIN THAT SUPPLY HEATED WIRE TO GROUND CHECK INDICATES ZERO VOLTAGE.

MOTOR WILL NOT RUN

1. Conrm 120V AC to the controller. Also, to verify correct polarity, check

for 120 V AC between hot supply and ground.

If there is no voltage, check for a loose connection where it connects to

the controller.

2. If there is 120 volts to the controller, check for loose connections or a

locked rotor. If the rotor cannot be freed the motor and blower assembly must be replaced.

MOTOR RUNS, PREPURGE TIME ELAPSES BUT MAIN

FLAME NOT ESTABLISHED.

1. Check to see if main manual gas valve is open.

2. Check for a loose connection at the transformer, or a defective

transformer.

3. Check for a loose connection at the gas valve.

4. Check for open pressure switches or open reset button. Check for

blockage in the intake and exhaust venting or at the vent hoods. If no blockage is found, check vinyl tubing for cuts or crimps. If this tubing is damaged it must be replaced. If these steps do not eliminate the problem, replace the pressure switches.

5. Check to see if there is resistance across the igniter terminal with an

OHM meter. If there is no continuity, the igniter is broken and should be replaced.

If the igniter appears to function properly, then verify that the inlet

pressure is within the range shown in Table 4. The gas valve supplied on the appliance is not designed to open against a higher inlet pressure of

10.5"WC (2.59kPa) for natural gas and 14.0"WC (3.45kPa) for propane gas. At this time, also check to make sure the inlet pressure is not lower than 4.0"WC (.98kPa) for natural gas and 11.0"WC (2.74kPa) for propane gas. If the inlet pressure is not within these limits then adjust the supply pressure accordingly.

If the inlet pressure falls within the allowable limits, then verify that the

manifold pressure, when the gas is fully open, with the heater running, is as called out in Table 4: that is, 4.0"WC (.98kPa) for natural gas and 10.0"WC (2.46kPa) for propane gas for the 120 and 150 models and 0"WC (0kPa) for both natural and propane gas 199 and 250 models. If the manifold pressure is not correct then adjust accordingly. See "ADJUSTMENT PROCEDURE" in "OPERATING INSTRUCTIONS" sections for manifold pressure adjustment procedure.

6. If the inlet and manifold pressures are within the limits specied in step 5,

then reset the appliance. Verify 24V AC at the gas valve during the three (3) second ignition trial, after the igniter reaches operating temperature. If 24V AC at the gas valve is not seen during this period, the controller must be replaced.

If there is 24V AC at the gas valve during the four second ignition trial

and the manifold pressure does not increase above 0" W.C. then verify that the manual gas control valve is in the “ON” position (see page 20). If the valve is in the “ON” position and the previous voltage and gas pressure conditions are met, then the gas valve is defective and must be replaced.

Note that a positive manifold pressure reading of approximately

1.5" (.38 kPa) W.C. is normal during the prepurge portion of the ignition

cycle due to the location of the gas orice.

MOTOR RUNS, BURNER LIGHTS MOMENTARILY,

THEN LOCKS OUT

1. Reset the appliance two more times to ensure that all of the air has been purged from the gas line.

2. If the burner lights momentarily but does not sustain ignition, verify that the inlet pressure is not greater than 10.5" WC (2.59 kPa) for natural gas and 14.0" WC (3.45 kPa) for propane gas or lower than the minimal supply pressure which is 4.0" WC (.09kPa) for natural gas and 11.0"WC (2.74 kPa) for propane gas. Also, verify that the manifold pressure is correct, that is, 4.0"WC (.98kPa) for natural gas and 10.0"WC (2.46kPa) for propane gas for the 120 and 150 models and 0"WC (0kPa) for both natural and propane gas 199 and 250 models. If the manifold pressure is not correct then adjust accordingly. See "ADJUSTMENT PROCEDURE" in "OPERATING INSTRUCTIONS" sections for manifold pressure adjustment procedure.

3. Check for the reversed polarity in the supply wiring. This controller is polarity sensitive. If the hot and neutral supply wires are reversed, the

controller will not sense ame. Reverse the supply wires and try to re

the unit.

NOTE: Always turn off and disconnect main supply wiring before servicing the unit.

4. Check connecting wire to the ame sensor. Verify that the ame sensor

has not been damaged in any way.

5. Verify that the air supply is adequate. The air inlet screen or blower wheel may be restricted. Also, check the installation for proper ventilation. See AIR REQUIREMENTS.

6. Check the venting system for the correct sizing, excess or insufcient.

See VENTING.

7. Check for maximum inlet pressure of 10.5"WC (2.59 kPa) for natural gas and 14.0"WC (3.45 kPa) for propane gas and the manifold pressure which is 4.0"WC (.98 kPa) for natural gas and 10.0"WC (2.46 kPa) for propane gas for the 120 and 150 models and 0"WC (o kPa) for both natural and propane gas 199 and 250 models. Please note that the manifold pressure listed is the maximum value for the manifold pressure. Do not set the manifold pressure higher than the value show in Table 4. OVER FIRING the heater will result in a rough ignition and/or noisy operation.

8. Confirm that the air inlet screen (see Figures 7 & 8) is free of obstructions.

CAUTION

Do not reach into the burner housing or combustion chamber if the heater is still hot. Allow the heater to cool and always use gloves as the combustion chamber and the burner sleeve and housing can become very hot after operation. OVER FIRING is a dangerous condition that must be corrected immediately.

GAS FAILS TO SHUT OFF

Check for defective gas valve or thermostat. If operation is incorrect, replace.

REPLACEMENT PARTS

Replacement parts may be ordered through John Wood Water Heater dealers, authorized servicers or distributors. Refer to the Yellow Pages for where to call or contact the John Wood Product Services and Support, 599 Hill Street West, Fergus, ON Canada N1M 2X1, or call 1-888-479-8324. When ordering parts be sure to state the quantity, part number and description of the item(s) including the complete model and serial number as it appears on the product. Refer to the part’s list for more information.

MODELS (A)JWSH100150 thru (A)JWSH100250 LIMITED WARRANTY

GSW Water Heating, the warrantor, extends the following LIMITED WARRANTY to the owner of this water heater.

1. THE TANK

If the glass-lined tank in this water heater shall prove to the satisfaction of the warrantor to have leaked due to natural corrosion from potable water therein,

during the rst THREE years after initial installation, the warrantor will supply a complete new John Wood water heater of equivalent size and current model. Some government agencies require energy efcient standards for water heaters. In the event that regulations prohibit the sale of a model of equivalent

size and construction, the warrantor will provide a model which complies with the regulations of your area, in which case the consumer will be charged the

difference in price between the like replacement and the energy efcient model required. The warranty on the replacement water heater will be limited to

the unexpired term of the original warranty.

2. ALL OTHER PARTS

If within ONE year after initial installation of this water heater, any part or portion shall prove to the satisfaction of the warrantor to be defective in material or workmanship, the warrantor will repair or replace such part or portion at its option.

3. CONDITIONS AND EXCEPTIONS

This warranty shall apply only when the water heater is installed in accordance with local plumbing and building codes, ordinances and regulations, the

printed instructions provided with it and good industry practices. In addition, a temperature and pressure relief valve, certied by A.G.A./CGA and approved

by the American Society of Mechanical Engineers, must have been installed. a. This warranty shall apply only when the heater is: (1) used at temperatures not exceeding the maximum calibrated setting of its thermostat; (2) used at water pressure not exceeding the working pressure shown on the heater;

(3) lled with potable water, free to circulate at all times and with the tank free of damaging water sediment or scale deposits;

(4) used in a non-corrosive and non-contaminated atmosphere; (5) used with factory approved anode(s) installed; (6) in its original installation location; (7) in the United States, its territories or possessions, and Canada; (8) sized in accordance with proper sizing techniques for commercial and/or residential water heaters; (9) bearing a rating plate which has not been altered, defaced or removed, except as required by the warrantor; (10) used in an open system or in a closed system with properly sized and installed thermal expansion tank; (11) operated with properly installed dirt leg;

(12) red with the fuel for which it was factory built; (13) red at the factory rated input;

(14) operated with the inner and outer combustion chamber doors in place.

b. Any accident to the water heater, any misuse, abuse (including freezing) or alteration of it, any operation of it in a modied form, any use

of insulation blankets, or any attempt to repair tank leaks will void this warranty.

c. This warranty is void if a device acting as a backflow prevention device (check valves etc.) is installed in the cold water supply the heater is connected

to, unless an effective method of controlling thermal expansion is also installed at the heater(s) and operational at all times. The relief valve installed on the heater is not an acceptable method.

4. SERVICE AND REPAIR EXPENSES

Under the limited warranty the warrantor will provide only a replacement water heater or part thereof. The owner is responsible for all other costs. Such

costs may include but are not limited to: a. Labor charges for service removal, repair or reinstallation of the water heater or any component part;

b. Shipping, delivery, handling, and administrative charges for forwarding the new heater or replacement part from the nearest distributor and returning

the claimed defective heater or part to such distributor.

c. All cost necessary or incidental for any material and/or permits required for installation of the replacement heater or part.

5. LIMITATIONS ON IMPLIED WARRANTIES

Implied warranties, including the warranty of merchantability imposed on the sale of this heater under province law are limited to one (1) year duration for the heater

or any of its parts. Some provinces do not allow limitation on how long an implied warranty lasts, so the above limitation may not apply to you.

6. CLAIM PROCEDURE

Any claim under the warranty should be initiated with the dealer who sold the heater, or with any other dealer handling the warrantor’s products. If this is

not practicable, the owner should contact: GSW Water Heating 599 Hill Street West Fergus, ON Canada N1M 2X1 or call 1-888-479-8324

a. The warrantor will only honor replacement with identical or similar water heater or parts thereof which are manufactured or distributed by the warrantor.

b. Dealer replacements are made subject to in-warranty validation by warrantor.

c. If requested by the warrantor, information relating to the purchase, transportation, operation and installation of the unit must be supplied. All claims

are subject to validation by the warrantor.

7. DISCLAIMERS

NO OTHER EXPRESS WARRANTY HAS BEEN OR WILL BE MADE IN BEHALF OF THE WARRANTOR WITH RESPECT TO THE MERCHANTABILITY OF

THE HEATER OR THE INSTALLATION, OPERATION, REPAIR OR REPLACEMENT OF THE HEATER. THE WARRANTOR SHALL NOT BE RESPONSIBLE

FOR WATER DAMAGE, LOSS OF USE OF THE UNIT, INCONVENIENCE, LOSS OR DAMAGE TO PERSONAL PROPERTY OR OTHER CONSEQUENTIAL

DAMAGE. THE WARRANTOR SHALL NOT BE LIABLE BY VIRTUE OF THIS WARRANTY OR OTHERWISE FOR DAMAGE TO ANY PERSONS OR

PROPERTY, WHETHER DIRECT OR INDIRECT, AND WHETHER ARISING IN CONTRACT OR IN TORT.

a. Some provinces do not allow the exclusion or limitation of the incidental or consequential damage, so the above limitations or

exclusions may not apply to you.

b. This warranty gives you specic legal rights, and you may also have other rights which vary from province to province.

Fill in the following for your own reference. Keep it. Registration is not a condition of warranty. The model and serial number are found on the heater’s rating plate.

Model No. ___________________________ Serial No. ________________________________________Date Installed ___________________ Dealer’s Name ________________________________________________________________________________________________________ Dealer’s Address _________________________________________________________________________Phone No. ____________________

City and Province ________________________________________________________________ Postal Code __________________________

KEEP THIS WARRANTY POSTED ADJACENT TO THE HEATER FOR FUTURE REFERENCE

NOTES:

599 Hill Street West

Fergus, ON Canada N1M 2X1

John Wood JWSH100150, AJWSH100150, AJWSH100199, JWSH100199, AJWSH100250 Installating And Operation Manual

Specifications and Main Features

Frequently Asked Questions

User Manual