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Model N-042
SAQ8625w
“Owner’s Manual and Installation Guideand Warranty Registration Card”
Thank you for purchasing a Noritz Gas Water Heater. Before using this water heater, please:• Read this manual to learn how to operate this water heater correctly.• Make sure the date and location of purchase indicated on the warranty registration
card is included separately.• Keep this manual (and the warranty registration card) where it can easily be found
whenever necessary.
NORITZ America Corporation
WARNING: If the information in this manual is not followed exactly, a fire orexplosion may result causing property damage, personal injury or death.
-Do not store or use gasoline or other flammable vapors and liquids in thevicinity 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 fire department.
- Installation and service must be performed by a qualified installer, serviceagency or the gas supplier.
*SAQ8625 T*
R
Prohibited Don’ttouch.
Don’tdisassemblethe equipment.
Don’t touchwith a wethand.
No flame.
HighTemperature.
To prevent damage to property and injury to the user, the icons shown below will be used to warn ofvarying levels of danger.Every indication is critical to the safe operation of the water heater and must be understood andobserved.Potential dangers from accidents during installation and use are divided into the follwing threecategories. Closely observe these warnings, they are critical to your safety.
Other icons
Danger
Warning
Caution
Ignoring this indication may cause immediate danger of death orserious injury.
Ignoring this indication may result in death or serious injury.
Ignoring this indication may result in serious injury or physical dam-age.
The content following this icon is necessary to understand for safeand easy use of this water heater.Remark
Be sureto do.
Ground.ElectricShock.
IMPORTANT SAFETY INFORMATION -1
DangerDo not use the water heater whenthe exhaust pipe is displaced, hasholes, or is corroded.
This may allow exhaust to leak from thepipe, which can result in death fromcarbon monoxide poisoning.
If you detect a gas leak:1. Do not try to light any appliance2. Do not touch any electrical
switch; do not use any phone inyour building.
3. Immediately call your gas sup-plier from a neighbor’s phone.Follow the gas supplier’s instruc-tions.
4. If you cannot reach your gassupplier, call the fire department.
A flame or spark mayignite the leaked gas.
2
Indications depending on the level of damage or injury
1
Contents
Contents ........................................................................................................ 1
Owner’s Manual
IMPORTANT SAFETY INFORMATION ......................................................... 2
Names and Functions of Components ....................................................... 7
Operation (Remote controller) ..................................................................... 8
Initial Operation ........................................................................................... 10
Running /Adjusting Hot Water .................................................................... 11
Tub Level Alarm ........................................................................................... 13
Muting the Sound of the Remote Controller ............................................. 15
Prevention of Damage Caused By Freezing in Cold Temperatures ....... 16
Regular Maintenance................................................................................... 18
Troubleshooting .......................................................................................... 20
Follow-up Service ........................................................................................ 24
Specifications .............................................................................................. 25
External outfitting ........................................................................................ 26
Combustion unit and gas route.................................................................. 28
Hot-water feed route .................................................................................... 30
Electronic control unit and attached set ................................................... 33
Installation Guide......................................................................................... 361. Included accessories ............................................................................ 372. Before installation ................................................................................. 373. Choosing installation site ..................................................................... 384. Installation clearances .......................................................................... 395. Installation .............................................................................................. 406. Exhaust piping installation ................................................................... 417. Gas piping .............................................................................................. 448. Supply water and hot water piping ...................................................... 459. Electric wiring ........................................................................................ 46
10. Trial operation ........................................................................................ 47
Dimensional outline drawing ...................................................................... 48
( Be sure to read and observe all safety information in this manual )
Leave the proper clearance be-tween the water heater and nearbyobjects (trees, timber, boxes withflammable materials etc.).
Do not place or use a spray cannear the heater or the exhaust ventterminal.
This may result in an explosion or fire.
* Indicates suggested clearances formaintenenance.
Left side:Min. 2" Right side:
Min. 2"
Min. 3"from exhaustpipe
Front:Min. 24"
Do not place combustibles such aslaundry, newspapers, oils etc. nearthe heater or the exhaust ventterminal.
These may cause a fire.
Do not use combustible chemicalssuch as oil, gasoline, benzene etc.in the vicinity of the heater or theexhaust vent terminal.
These may cause a fire.
Check the air supply vent for dustor obstructions.
Exhaust ventterminal
43
IMPORTANT SAFETY INFORMATION -2
If you detect abnormal combustionor abnormal odors, or during anearthquake, tornado, or fire:
1. Turn off the hot water supply2. Turn off the power to the water
heater3. Turn off gas and water at the
main4. Consult the nearest Noritz agentThis will prevent fire, electric shock ordamage to the unit.
Check the temperature of therunning hot water by hand beforetaking a shower.
Also check the temperature byhand before stepping into the bathtub.
Do not turn off the water heater orchange the water temperature whilesomeone is bathing.
This can result in scalding or temperatureshock.
Warning WarningBe sure the gas supplied matchesthe gas on the rating plate.
Using an improper gas or electric supplymay cause improper operation, fire orelectric shock.
Do not allow small children to playunsupervised in the bathroom.Do not allow small children tobathe unsupervised.
Accidents may occur.
Consult the nearest Noritz agent ifthe water heater location needs tobe changed.
Contact a qualified service techni-cian for any necessary repairs,service or maintenance.
Manufacturing year and month
6
Do not disassemble the remote controller.
This may cause damage to the heater or unex-pected accidents.
Do not use benzene, oil or fat detergents toclean the remote controller.
This may cause deformation.
Do not get the remote controller wet.
Although it is waterproof, too much water cancause damage.
Do not splash water on the remote control-ler. Do not expose the remote controller tosteam.
Do not locate the remote controller near stoves orovens, this may cause damage or failure.
Take measures to prevent the unit fromfreezing. ( P16)
If water is allowed to freeze inside the unit, the unitmay be damaged, and water can leak out of it.
Take necessary measures to preventfreezing of water and leakage of gas whenleaving the unit unused for long periods oftime. ( P17)
If it is snowing, check the air inlet, exhaustgas vent and exhaust vent terminal forblockage.
This can result in improper function or damage tothe unit.
Do not use parts other than those speci-fied for this equipment.
Do not drink water that was inside the unitfor an extended period of time, do notdrink the water that comes out of the unitjust after the first use of hot water in themorning.Use it for other purposes.
Clean the filter on the water inlet.
If you don’t know where the filter is, contact thenearest Noritz agent.
Keep the area around the unit clean.
If boxes, weeds, cobwebs, cockroaches etc. areallowed to be in the vicinity of the unit, damage orfire can result.
Do not install the equipment where theexhaust will blow on walls or windows.
This may cause damage or discoloration.
Do not use spring water or well water.
This can cause damage and reduce durability.
Check for proper combustion duringoperation and that the flame stops afteroperation is finished.
To prevent accidents due to gas.
IMPORTANT SAFETY INFORMATION -3
Be sure to electrically ground theunit.
Do not touch the power cord withwet hands.
Keep power cord free of dust.
This can cause a fire.
Do not use a broken or modifiedpower cord. Do not bind, bend orstretch power cords.
Do not place things on them,scratch. Do not scratch, modify orsubject them to impact or force.
Do not use the water heater forother than hot water supply,shower and bath.
To prevent unexpected accidents.
Do not touch the exhaust vent pipeduring or immediately after opera-tion of the water heater.
Do not connect the water heater toa solar water heater.
This can result in unreliable temperaturecontrol, scalding or equipment failure.
Do not use hair spray or spraydetergent in the vicinity of theheater.
These may cause damage to the heater.
5
Remark Caution
8
Operation (Remote Controller)
Operation Panel (RC-7646M)
Display ( next page) For setting the hot
water temperature,and other adjust-ments.
Operation buttonFor turning theheater on and off
Water fill set buttonFor setting the level ofhot water.
( p.13 and 14)
Setting button
* Before use, remove the protective sheet from the remote controller surface.
Name and Functions of Components
7
Indoor / Outdoor wall mounted power vented model
* The above illustration shows an example of installation.The shape of the piping, and the location of the water main, gas main and power cord willdepend on the specific installation.
Main unit
Exhaust gas vent
Front cover
Air inlet
Water supply valve
Gas valve
Operation Panel
Water filterMounted inside.
( P19)
Initial Operation
Before the first use of your water heater, the following preparations and checks are necessary.
1 Fully open the water supplyvalve. (Turn the handle sothat is lines up with the pipe)
Open a hot water fixture to confirm thatwater is available, and then close thefixture again.
3 Fully open the gas valve.
Hot water fixture
Follow steps 1 through 4.
10
2
9
Water temperature(Ex.: 104°F)
Water levelThe display will flash
( p.14)
Failure indicator
When this indicatorlights, the hot watertemperature can be set.
( p.12)
Priority indicator
The illustration below shows the remote controller display. What isactually displayed depends on how the water heater is set.
Burning indicator
A number will flash ifa failure occurs.
( p.23)
Display
4 Turn on the power.
OFF ON
1Press theOperation button.
How to use
Running /Adjusting Hot Water
Previously settemperature (Ex.: 104°F)
The temperature will beindicated on the display.
12 <With Operation button Off>
On
<Remote controller display>
On
CautionHigh Temperature
To prevent scalding:
• Check the water temperature by hand before bathing orshowering.
• When you set the temperature to 140° F or 167° F, thedisplay will flash for 10 seconds to remind you that thisis a high temperature.
• Be careful the next time you use the heater after settingit at 140° F or 167° F. Check the temperature settingbefore using.
• Do not allow anyone to change the water temperaturewhile hot water is running.
Flash for 10 sec → light up
1211
43 Run hot water.2 Adjust temperature.
Check the indicator lights.
Hot
Cold
Water temperature
If the remote controller was left set at 167° F the last time it was used, the setting will drop to140° F as a safety precaution.
On
(°F: )The figures shown below are just examples. The actual temperature settingnecessary depends on the usage, the length of piping and the season
Stop the hotwater.
*Initial setting (factory setting at shipment)=104°F
Off
Shower, hot water supply,etc.
Washingdishes, etc.
Hot water supply, etc. Hightemperature
99 100 102 104 106 108 109 111 113 115 117 118 140 167
If using a mixing valve, set the watertemperature on the remote controlapproximately 18°F higher thanusual.
( Check the temperature)if you will not bechanging it
Temperature above 125 degree can scald.
Warmer HotWarm
2Adjust temperature.1 Press theOperation button.
How to use
Tub Level Alarm
Previously set temperature(ex. : 104ºF)
Hot
Cold
The temperature will beindicated on the display.
1. Plug the bath drain.
On
Preparation
3
2,31
Check the indicator lights.
Water temperature
On
<With the operation button off>
1413
(Check thetemperature if you willnot be changing it
)
5 Stop the hotwater when thealarm sounds.
4 Run the hotwater.3 Adjust tub level
setting
On
• If water is being used besides what is needed for the tub, the alarm will sound before the setlevel is reached in the tub.
• If there was water remaining in the tub, or if the water is not manually turned off after thebuzzer sounds, the tub may overflow.
• If there was water remaining in the tub, the temperature after the tub is filled the rest of theway will be less than the set temperature.
<The setting is remembered>
Water level will be flashing (ex.:45 gal.)
* The level can be adjusted whilethe indicator is flashing.
* The temperature will return afterten seconds.
Set the water level of your tub, thechoices for settings are anything be-tween 10 and 65 gal., in incrementsof 5, and 80, 90, 105 and 990 gal.
(Reference values)
Note: The alarm will not sound if itis set for 990 gal.
The alarm will sound whenthe specified level has beenreached. Stop the water.
The alarm will sound for tenseconds when the waterreaches the specified level.
(But the water will continue to rununless it is manually turned off.)
Press the operation button (the levelsetting indicator will flash) and thenthe setting button.
Increase
Decrease
Off
* Initial factory setting at shipment: 104° F
Water temperature
99 100 102
The temperatures shown below are only examples. Your actualreaction to set temperatures will depend on the season and thelength of piping.
Note: The alarm will notsound if it is set for 990gal.
104 106 108 109 111 113 115 117 118
16
When any button on the remote controller ispushed, a sound is emitted. This sound can bemuted if you desire.
Water level alarm cannot be muted.
1
How to use
Muting the Sound of the Remote Controller
SoundMute
No sound
1 With the remote controller off, pressand hold the operation button for fiveseconds to turn the sound on or off.
15
After approx.5 sec., sound
If water will not flow because it is frozen
Prevention of damage caused by freezing in cold temperatures
1. Close the gas and water valves.2. Turn off the operation button.3. Open the water supply valve from time to time to check whether water is running.4. When the water is flowing again, check for water leaks from the equipment and piping, or
follow steps 1 through 4 on p. 10 (“Initial Operation”)
The freeze prevention heaters willnot prevent the plumbing externalto the unit from freezing. Protectthis plumbing with insulation or anelectric heater. If you are stillworried that your heater willfreeze, contact the nearest Noritzagent.
When the temperature drops, the freeze-preventionheaters are automatically activated to keep the unitwarm and prevent it from freezing.
Normal cold [outside temperatures more than 5°F with no wind.]
The heater and piping can be damaged if cold temperatures cause water to freeze inside theunit. The damage can be prevented with the following method:
At these temperatures, the units have freeze prevention heaters that will prevent freezing.* Do not disconnect the power. The freeze prevention heaters will not work if the power
is disconnected.* The freeze prevention will work regardless of whether the operation button on the remote
controller has been turned on.
• If the heater or the piping is frozen, do not use the heater, or it may get damaged.• Repairs for damage caused by freezing is not covered by the warranty.
For severely cold temperatures [ ]Run water to prevent freezing
1. Push the operation button and confirmthat the operation light comes on.
2. Close the gas supply valve.3. Open a hot water fixture and let it run
for approx. 1 minute, and then checkthat the number 11 is flashing on theremote controller display* It is possible that a different number may be displayed
on the remote controller, but as long as it is flashing,you may continue..
4. Open a hot water fixture, and keep a small amount of hotwater running (.1 gal./minute or about .2” thick.* If there is a mixing valve, set it to the highest level.
5. The flow may become unstable from time to time. Checkthe flow 30 minutes later.
• This method can be appliednot only to the heater, but alsoto the water supply, waterpiping and a mixing valve.
• Remember that if the mixingvalve is set to the maximumlevel, there is a risk of scalding.
• If freezing still might occur,drain the water from the unitfollowing the steps on p. 17.
Hot water fixture
.2” thick
outside temperature including wind chillis less than 5°F
18
1 Turn on the operation button, and check that the light comes on.
2 Close the gas valve.
3 Open a hot water fixture, and keep it open for approximately 1 minute until the number 11is flashing on the remote display.
* It is possible that another number may displayed on the remote controller, but as long asthe number is flashing, you may continue.
4 Close the water supply valve.
5 Keep the operation switch on and disconnect the power.
6 Fully open all hot water fixtures.
7 Remove inlet and outlet drain plugs. (0.1 to0.2 gal. Will drain out of the unit).
8 When the water is completely drained, re-place all drain plugs and close the hot waterfixtures.
To turn the unit back on
To avoid burns, wait until the equipment cools down beforedraining the water. The appliance remains hot after it isturned off.
Drain the water as follows:
High Temperature
Provide a pan or bucket for drainage to prevent water damage.
Caution
1. Check that all drain plugs are inserted.2. Check that all hot water fixtures are closed.3. Follow the procedure on p. 10 “Initial operation”.
This method cannot prevent the water supply, hot water piping and water supply valve fromfreezing.Be sure to protect them with insulation or an electric heater.(If you are still worried the unit will freeze, consult the nearest Noritz agent.)
If the water heater will not be used for a long period of time
17
To avoid burns, wait until the equipment cools downbefore draining the water. The appliance remains hotafter it is turned off.High Temperature
Maintenance (once a month)
Wipe the outside surface with a wet cloth, then dry the surface. Use a neutral detergent to cleanany stains.
• Do not use benzene, oil or fatty detergent to clean the remote controller.Deformation may occur.
• The remote controller is waterproof, but it should be kept dry as much as possible.
Caution
Regular Maintenance
Inspection (Once a month)
Check For laundry, newspaper, timber,oil, spray cans and other com-bustible materials. ( P.4)
Equipment
Operation Panel
Wipe the surface with a wet cloth.
Check For abnormal soundsduring operation.
For abnormalities inexternal appearance,change in color or flaws.
Check
For water leaks from theequipment and piping.
Check
For dust in the air inlet.Check
Check For dust and soot in theexhaust vent or exhaustvent terminal.
Do not touch with wet hands.
fixture
7 Drain plug
20
Maintenance (once a month)
If the water filter is covered with debris, the hot water will not run smoothly, or cold water maycome out. Clean the filter as explained below.* To avoid burns, wait until the equipment cools down before draining the water. The
appliance remains hot after it is turned off.
Water filter
1. Close the water supply valve.2. Open all hot water fixtures.3. Loosen the Drainage Outlet.4. Remove the Drainage Outlet from the band.
(see illustration on right).* Water will drain out.
5. Clean the filter with a brush under runningwater.
6. Replace and screw the Drainage Outletclosed.(Take care not to lose the packing.)
7. Close all hot water fixtures.8. Open the water supply valve and check that
water is not leaking from the DrainageOutlet.
19
Temperature
Hot water is not available whenthe hot water fixture is opened.
• Are the gas and water supply valves fully open?
• Is the water supply cut off?
• Is the hot water fixture sufficiently open?
• Is the heater frozen?
• Is the gas meter working?
• (For LP) Is there enough gas in the tank?
• Is the operation button turned on?
• Have you allowed enough time for the cold water in thepipes to drain out?
• Are the gas and water supply valves fully open?
• Is the water temperature setting appropriate ( p.11 andp.12)?
• If the supply water is at a high temperature, you mayneed to increase the flow rate through the heater to geta low temperature out of it.
Hot water is not available at lowtemperatures.
Cold water comes out when thefixture is barely opened. Onlycold water is available at lowflow rates.
• The heater stops burning when the flow of hot waterbecomes less than 0.75 GPM. Open the hot waterfixture more, and the water temperature will stabilize.
Troubleshooting-1
• Are the gas and water supply valves fully open?
• Is the water temperature setting appropriate ( p.11 andp.12)?
Hot water is not available athigh temperatures.
Water supply valve
Packing
Water filter
Drainage OutletBand
Remote controller
The water temperature changesafter a power failure or when thepower is disconnected.
The operation light doesnot come on
• Has there been a power failure?
• Is the power connected properly?
• The time on the controller may need to be reset after apower failure or after the power has been disconnected.Also, the hot water temperature indicator, and tub levelalarm may have been reset.
Amount of hot water
The pressure at a certainfixture is not constant.
• When hot water is demanded at other fixtures, theamount available may be reduced.
• Pressure fluctuations and other plumbing conditions cancause the temperature and pressure at a fixture to beunstable, but it should stabilize after a short time.
• To keep the temperature stable, the heater limits theamount of water that can flow through it to a smallamount initially, but the amount increases over time.
2221
Other
The Heater stops burning duringoperation.
• Are the gas and water supply valves fully open?
• Is the water supply cut off?
• Is the hot water fixture sufficiently open?
• Is the gas meter working?
• (For LP) Is there enough gas in the tank?
• This is normal on cold days.White smoke comes out of theexhaust vent on a cold day.
The hot water becomes turbid. • This is harmless. Small bubbles appear as the air in thewater is heated and depressurized rapidly to atmo-spheric pressure. It is similar to the bubbles in beer orcarbonated beverages.
Water leaks from the drain plugs onthe outlet.
• When the main unit is highly pressurized, water will leakfrom the drain plugs as a safety so that the unit is notdamaged by the high pressure.
• These plugs are pressure relief valves. If water isleaking out of them, excessive pressure is being sup-plied to the unit.
Sound
The fan can be heard afteroperation is stopped.
The fan can be heard when it isvery cold outside.
• The fan runs for a while to accelerate ignition after theoperation button is turned on.
• The fan may run to prevent freezing.
Troubleshooting-2
Burner has been usedcontinuously for 60minutes or more.
Turn off the hot watertap, press the powerswitch OFF and the press it ON again. If<01> is not displayed, then operation isnomal.
Indication Cause Action
Flashing
åÃè·ï\é¶Ç Ç®í≤Ç◊Ç≠ÇæÇ≥Ç¢ åÃè·ï\é¶Ç Ç®í≤Ç◊Ç≠ÇæÇ≥Ç¢Check for error code on the remote controllerIf there is a problem with the unit, a numerical error code will flash on the remote controller.If this occurs, take appropriate measures as listed below.
Ex. When an error code appears, the display and the operation lightwill flash together.
Contact our sales agent if:• Any other flashing number appears.• An error code is indicated again after the above actions were followed.• You have any other questions.
2423
A warranty registration card is included separately.Be sure that the shop name, date of purchase and other necessary items are filled in.Read the content carefully, and keep the warranty card in a safe place.
For repairs after the warranty period, there will be a charge on any service, and service will onlybe performed if the unit is deemed repairable.
Follow-up service
Requesting service
Minimum period of time for stocking repair parts
Noritz will stock repair parts for this unit for a minimum of seven years after production hasceased.These are the parts necessary to repair or maintain this unit.
Reinstallation
Warranty
First follow the instructions in the troubleshooting section (p. 20 to p. 23). If the error is notcorrected, contact our sales agent.
If you want to reinstall the appliance at a different location, confirm that the gas and powersupply indicated on the rating plate are available at the new location. If you are not sure, consultthe local utility company.
If you move to a region that uses a different type of gas, conversion and adjustment of theappliance will be necessary. This work will be charged for even during the warranty period.
* It should be noted that a request for service may be rejected if the water heater isinstalled in a location where working on the unit may be dangerous. If so, you will haveto consult a plumber to remove the unit and bring it to a safe location.
We will need to know:The Model .............. (check the rating plate)
*See p.3 for the location of the labelDate of purchase ... (see the warranty)Details of error ...... (flashing error codes)Your name, address, and telephone numberDesired date of visit
Troubleshooting-3
Ignition error Check whether the gas valve is open. Turnoff the operation button, open a hot waterfixture, and turn on the operation buttonagain. If the problem is solved, the flashingnumber will disappear.
SpecificationN-042
Indoor or Outdoor, Wall HangingPower Vented
Direct Ignition15-150 PSI0.75 GPM
20.5"(Height) x 13.8"(Width) x 6.7"(Depth)44 lbs.
0.1 Gallon3/4"3/4"1/2"
120 VAC (60Hz)NG:65W, LP:65W, Freeze Prevention 131W
Zincified Steel Plate/Acryl CoatingStainless Steel
Copper Sheeting, Copper Tubing
Flame Rod, Thermal Fuse, Pressure Relief Valve,Lightning Protection Device (ZNR), Electric Leakage
Prevention Device, Overheat Prevention Device,Freezing Prevention Device, Fan Rotation Detector
Temperature Control Panel, Exhaust Adapter,Anchoring Screws
ItemModel NameType
IgnitionOperating PressureMinimum Flow RateDimensionsWeightWater Holding Capacity
Accessories
InstallationAir Supply/Exhaust
Connection Sizes
Power Supply
Materials
Water InletHot Water OutletGas InletSupplyConsumptionCasingFlue CollarHeat Exchanger
Safety Devices
25
Specifications
Specifications • Specifications may be changed without prior notice• The capacity may differ slightly, depending on the water pressure,
water supply, piping conditions, and water temperature.
Performance table
26
031
001
017
007
010
021
019
036 018023
020
033
022
033
011
032
012
013
014
009
008
015
033
034
003
016
004
002
006
035
External outfitting
ItemGasConsumption
Hot WaterCapacity
Capacity RangeTeperature SettingsDefault Temperature Options
NGLP45˚F Rise72˚F Rise
4.2 Gal./min.2.6 Gal./min.
0.75-4.2 Gal./min.99-118,140,167˚F(14 Options)
108,113,140,167˚F(Original is 108˚F)
Maximum Performance119,000 btuh119,000 btuh
Minimum Performance20,000 btuh20,000 btuh
N-042 Specifications
100
104103
102
105167
110
113
111
112
033033
167
162
033
169
126127
127
165 128
125
033
033
101
118
164
166
170
133
134
132
140
166
145
120
115
116
033
036
117
114
Combustion unit and gas route
28
001 Front set AS SBD7559 1002 Short front packing BVU BVUL002 1003 Caution label 1 EAU EAUK003 1004 Plug insulating sheet DKE DKEK001 1006 Repressing packing for terminal block BSA BSAL003 1007 Case SET EDN EDNA001 1008 RC-7646M-USA unit SHA2164 1009 Wiring coupling CZL CZLA010 1010 Grommet CXP CXPA026 1011 Case top cover CXK CXKA018 1012 Case top packing EBN EBNL001 1013 Exhaust cylinder packing EBN EBNL002 1014 Case top cover EBN EBNA004 1015 Remote controller mounting plate EBN EBNA014 1016 Caution label 2 EAU EAUK004 1017 Connection diagram label EDN EDNK002 1018 Short circuit safety device DJP DJPJ031 1019 Conduit M92-350 EDN EDNJ007 1020 Conduit 92-100V EAU EAUJ017 1021 Transformer EDN EDNJ006 1022 Transformer cover DJP DJPA054 1023 Short circuit safety device mounting plate EDN EDNA004 1
031032033034035036
Cross recessed type 3 PW EVERTIGHT truss tapping screw 4X12Cross & straight recessed round-head collar/protrusion S TIGHT 4X8Cross recessed round-head collar N-tapping screw 4X8Cross recessed round-head type 2 tapping screw 4X16Cross recessed bind machine screwCross recessed round-head collar N-tapping screw 4X12
Part Nos. Part Names Order Nos. Q’ty/unit
External outfitting
27
403401
405
033
033400
402
402404
431
162
428
409
464
427
464
429
426
425402
406
409
402
435
448
420
417
415418
419
415
450
449
463
437438
436
463
422466
443
429
465
444
Thermal fuse403
401 402
424421
402 402 Thermal fuse fastenerThermal fuse fastenerThermal fuse fastenerThermal fuse fastener
(Thermal fuse rounding procedure)
424
421
423
430
Freeze preventive heater
Fastener
Hot-water feed route 1
30
100 Combustion tube SET DTX DTXC002 1101 Suction air joint packing DTX DTXL001 1102 Ignition plug CZL packing DLK SET-V SBC7684 1103 Frame rod DLK packing DLK SET-V SBC7685 1104 Plug packing (for B) DLK SAB2715 1105 Plug fixing plate (for B) DLK DLKC029 1110 Main damper Q14 CRU CRUC034 1111 Fan packing Q DTJ DTJL004 1112 Fan flange DTJ DTJF035 1113 Fan motor DTJ SET-AS SBC7734 1114 Bell-mouse ø32 DTJ
Bell-mouse ø30 DTJDTJF047 1DTJF046 1
115 Igniter mounting plate DTJ DTJA015 1116 Igniter CRP CRPJ002 1117 High-voltage cord L350 ALS ALSJ079 1118 Conduct guard packing DTJ DTJL010 1120 Nylon clamp HP-2N (NK-2N) 7144105 1125 Front pipe L15 DTX SET-AS SBC7690 1
Front pipe L20 DTX SET-AS SBC7691 1126 Front pipe seal packing-top DTX DTXL005 1127 Front pipe seal packing-side DTJ DTJL007 2128 Front pipe seal packing-bottom DTX DTXL006 1132 Gas mech. S16D DTJ SET-V SBC7692 1133 O-ring P18 2110903 2134 O-ring P28 1648306 1
140 Gas fitting 15A SET EDN EDNE001 1145 Conduit R10 EDN EDNJ005 1
162164165166167169170
Cross recessed round-head N-tapping screw 4X8Cross recessed PW truss screw M4X12
Cross recessed truss screw M4X8
Cross recessed round-head type 3 EVERTIGHT tapping screw 5X16
Cross recessed round-head N- tapping screw 4X10Cross recessed hexagon head machine screw M4X8
Cross recessed round-head SPAK machine screw guide M4X14
Part Nos. Part Names Order Nos. Q’ty/unit
Combustion unit and gas route
29
Hot-water feed route 1/Hot-water feed route 2
400 Piping base collective trunk EBN SET-AS SBC7963 1401 Thermal fuse fastener CZL CZLH005 1402 Thermal fuse fastener DTJ DTJH002 5403 Thermal fuse Q DTX SET-V SBC7705 1404 High limited 120 DJP DJPH002 1405 Exhaust adapter EDN EDNF001 1406 F-point thermostat BVU BVUH002 1409 Harness clip HGK HGKL015 2415 Quick fastener for 13-22 SAD6537 2417 Quick fastener 16A 6340300 1418 O-ring P12.5 3359701 1419 O-ring P12.5C 3359808 1420 O-ring P16 2144905 1421 Freeze preventive heater CRP SET-V SAQ7745 1422 Freeze preventive heater 3 BGD BGDH002 1423 Freeze preventive heater 2 BGD BGDH005 1424 Heater fastener CRP CRPH004 2425 Water mech. 3 SET DUC DUCD005 1426 Magnetic sensor CXD CXDD003 1427 Water inlet thermostat 300 BWC
Water inlet fitting 20A SET EDN
BWCD097 1428 O-ring P4 2100908 1429 Thermistor holding plate ALS ALSD088 2430 Heater fastener-M AJB AJBL002 1431 F-point thermostat SET DJP DJPH003 1435 EDND001 1436 Water filter cap DTJ DTJD006 1437 O-ring 16DF BRQ BRQL008 1438 Water filter DTJ DTJD005 1443 Hot-water outlet thermostat 300 BWC BWCD096 1444 O-ring P4C 1323709 1448 Hot-water outlet fitting 20A SET EDN EDND003 1449 QMF safety valve A(S) SAA2811 1450 Hot-water resistant O-ring P9 SAD6635 1
463464465466
Cross recessed P TIGHT truss screw 4X14Cross recessed round-head type 3 EVERTIGHT collar tapping screw 4X12
Cross & straight recessed round-head type 3 S TIGHT tapping screw 4X8Cross & straight recessed truss type 3 S TIGHT tapping screw 4X6
Part Nos. Part Names Order Nos. Q’ty/unit
32
Hot-water feedroute 2
471
494
490
150451
452
440
505
151
449
464
151459
458
504
440 505
151
460
433
492
493
491
471
450
444
435
445
434
446512
513
492471
478
448
447446512
513
454
494
444
443
455
502
427
405
440
446
507444
150
151
428491
493
502
466
466
468
468
151507
446
440
483
151
444481485
482
465467
487
494
488
477
486
480
476
C
B
A
C
31
Attached set
705
706
707
701
700
036
Special part Special part no.
<Special part>
Instruction manual 888801
Electronic control unit and attached set
34
700 Relay case DTJ-D SET-AS SHA7421 1701 Relay case cover DUC DUCJ004 1705 Harness 1 EDN EDNJ002 1706 Conduit R89 EBN EBNJ004 1707 Gas type change connector 1 DJP
Gas type change connector 1 DJP
DJPJ011 1
800 GQ-1623WE-H USA package P SET-V SBD7560 1801
888 SAQ8625 1
(Supplied parts when shifting the power source: from NG to LPG)114 DTJF047 1125 SBC7690 1133 2110903 2
(Supplied parts when shifting the power source: from LPG to NG)114 DTJF046 1125 SBC7691 1133 2110903 2707 DJPJ011 1
Cross recessed round-head type 1 tapping screw 5X35
Instruction manual GQ-1623WE-H America
Bell-mouse ø32 DTJ
Bell-mouse ø30 DTJ
Front pipe L15 DTX SET-AS
Front pipe L20 DTX SET-AS
O-ring P18
O-ring P18
Part Nos. Part Names Order Nos. Q’ty/unit
Electronic control unit and attached set
33
Installation GuideGAS WATER HEATER
N-042 (Indoor or Outdoor installation)
Warning
Injuries and damage due to accidents during installation are divided into the following categories.Closely observe indications of these three categories. It is critical to your safety.
Caution Ignoring this indication may result in serious injury or physical damage due toincorrect handling of the water heater.
Ignoring this indication may result in death or serious injury due to incorrecthandling of the water heater.
Danger Ignoring this indication may cause an immediate danger of death or seriousinjury due to incorrect handling of the water heater.
GeneralProhibition
Pull outpower plug
Be sure toground Be sure to do
• Failures and damage caused by erroneous work or work not as instructed in this manual are notcovered by the warranty.
• Check that the installation was done properly in accordance with this Installation Guide upon completionof the installation work.
• Please put your information on the warranty card in the operation manual and give it to the customerwhen installation is completed.
Requests to installers• In order to use the water heater safely, read this installation manual carefully,
and follow the installation instructions.Caution
NORITZ AMERICA CORPORATION
WARNING: If the information in this manual is not followed exactly, a fire or explosion may resultcausing property damage, personal injury or death.
Installation must conform with local codes, or in the absence of local codes, the National Fuel GasCode, ANSI Z223.1/NFPA 54.
3635
MEMO
Install the water heater in a location where it is free from obstacles around the equipment and air isnot stagnant in order to prevent incomplete combustion.
Do not install the water heater near staircases or emergency exit.
Avoid places where fires are common, such as those where gasoline, benzene and adhesives arehandled, or places in which corrosive gases (ammonia, chlorine,sulfur, ethylene compounds, acids) are present.
Installation in an improper location may cause failures or fires.
Install the exhaust vent so that obstacles will not be placedaround the end of the pipe, and exhaust gas will not stagnate.
Do not install the water heater where the exhaust gas blows onouter walls or material not resistant to heat. Also consider thesurrounding trees and animals.
The heat and moisture from the water heater may causediscoloration of walls and resinous materials, or corrosion ofaluminum materials.
Avoid installation above gas ranges or stoves.
Avoid installation between the kitchen fan and stove. If oilyfumes or a large amount of steam occur in the installationlocation, take measures to prevent the fumes and steam fromentering in the equipment.
Avoid installation in dusty places where sand or dust accumu-late.These environments will decrease the performance of the fan,causing incomplete combustion.
Determine a location of installation where the flow of exhaustgas is not affected by the outlet of the fan or range hood.
Take care that noise and exhaust gas will not affect neighbors.
Make sure that the location allows installation of the exhaustvent as specified.
Avoid installation at places where special chemical agents (e.g.,hair spray or spray detergent) are used.
This may cause incomplete connections or failures.
*Locate the appliance in an area where leakage from the unit or connections will notresult in damage to the area adjacent to the appliance or to the lower floors of thestructure. When such locations cannot be avoided, it is recommended that a suitabledrain pan, adequately drained, be installed under the appliance. The pan must notrestrict combustion air flow.
3.Choosing installation site
Caution
38
1.Included accessoriesThe accessories listed below are containedin the package. Check these accessoriesbefore installation.
Q'tyShapePart name
Tapping screwø5 x 35
5
Part name Shape Q'ty
Operation Manual(with a warranty)/
Installation Manual1
Check the gas
Check that the kind of gas indicated on the label, and that usedfor the equipment are compatible.
Check the power
The power supply is 120V AC, and 60Hz.Using a different voltage may cause afire or electric shock.
Do not use equipment for purposes other than those specified
Use the gas water heater only for hot water supply or showers,otherwise it may cause unexpected accidents or failure of theequipment.
Check Ground water and well water
Check the quality of water thoroughly if it is necessary to use ground water or well water. Theequipment may corrode depending on the quality.
Do not connect to solar water heaters
Do not connect the water heater to solar water heaters. When the water temperature rises insummer, it becomes uncontrollable. If water is supplied at extremely high temperature, it maycause burns or failure of the equipment.
* If desired use a water mixing valve to keep the temperature down and present burns.
Replacement
* Check the fixing brackets and exhaust vent yearly to make sure they do not to be replaced. Donot install it outside or in a bathroom or other occupied room Installation in an improper locationmay cause failures or fire.
2.Before installation Caution
Manufacturing year and month
37
Schematic illustration
5.Installation
Work
qDrill holes for tapping screws, secure the tappingscrews temporarily on the wall, and hang the mount-ing board (upper side) on the tapping screws.
wDetermine the screw positions (two at the top andbottom respectively), and take off the equipment.
Item
eDrill holes at the screw positions on the wall.
rHang the equipment again on the tapping screwssecured temporarily, and tighten the tapping screws(two at the upper and lower sides respectively).
Install the water heater firmly so it will not turn over,get damaged or broken due to the shocks of earth-quakes or vibrations.
NoteBe careful of injuries when you need to work withbare hands.Be careful of electric wiring, and gas and water pip-ing inside the house while drilling holes.
Loca
tion
of s
crew
hol
e
Installtaion must conform with local codes, or in the absence of local codes, the National Fuel GasCode, ANSI Z223.1/NFPA 54. A heavy load will be applied to the wall on which the water heater ismounted. If the strength of the wall is not sufficient, reinforcement will be necessary.
Take care not to drop the water heater, or otherwise damage it.The internal parts can be damaged and cause a danger of accident.
Be sure to mount the water heater on an upright wall.
Securing to the wall
Mou
ntin
gW
ater
hea
ter a
nd b
uild
ing
stru
ctur
e
Mounting board(upper)
Location of screw hole
Tapping screw
Min: 1"
Insulation material
Building (Covered withmetal wooden screw)
40
Before starting installation, check the followingInstall is accordance with relevant building and mechanical codes ,as well as any local state ornational regulation.
Item
Place the equipment away from flam-mable materials and noncombustiblematerials (including parts of a building fin-ished with these materials) as shown inthe right column.
It is convenient to leave 8 inches or moredistance at both sides for inspection.
Leave 24 inches or more space in frontso as to facilitate inspection and repair ofthe equipment.
Confirmation Schematic illustration
(unit: inch)
4.Installation clearances Caution
24" ormore
8"ormore
8"ormore
Min: 3"
Min: 3"
39
Item
Leave sufficient distance when installingthe water heater around permanent gascooking equipment which can producesteam containing oily smoke.Oils and fats may enter the equipmentthrough the air inlet, and cause fires. Toprevent this, use the method shown tothe right.
<An example of efficient placement to prevent oilsand fats entering in the water heater>
Confirmation Schematic illustration(unit: inch)
Water heater
Range
Exhaust hood
Dividing plate
* The dividing plate should be of noncombustiblematerial of a width greater than the water heater.
Req
uire
d cl
eara
nces
from
com
bust
ible
Sug
gest
ed c
lear
ance
Cle
aran
ce fr
om c
ooki
ng e
quip
men
t
Min: 2"
Min: 3"
Min: 0.4"
Distance from the side wall Distance from the rear wall
WARNINGIn the USA, do not install the heater with the vent within 4 feet of any openinginto a building. In Canada, do not install the heater with the top of the ventassembly within 10 feet any opening into a building.
Installation of exhaust vent and end of pipe Discharge the exhaust gas outsideusing the extension sold separately.
Make the vertical section at the exhaust ventas short as possible.
Maintain the same vent pipe diameter all theway to the end.
Use only listed category III vent materials. Make sure vent pipe is gas tight and will not
leak. Do not place any dangerous objects at the end
of the exhaust vent. Steam (smoke) or water drops may come out
from the end of the exhaust pipe. Select thelocation for the end of the vent so that steamis not visible, and the vent is not wet with drip-ping water.
If snow is expected to accumulate, take carethe end of the pipe is not covered with snowor hit by falling lumps of snow.
Preparation before installation Exhaust pipe diameter and limit length
Check that the length from the installation loca-tion of the water heater to the end of vent is withinthe specified maximum distance.
* If this limit is exceeded, explosion may occur.
Be sure the vent pipe directs exhaust to the out-side of the building.
Avoid firewalls when determining the route forinstalling the exhaust pipe.
Do not mount a fireproof damper on the exhaustpipe.
* The shortest vent length is1 meter with a bend.(The end of exhaust pipe isnot included as a bend.)
Avoid the instal lat ionshown in the illustration onthe right
Exhaust hood
Water heater
Pipe diameter 3"
Limit of exhaust 15 feets with 3 bendsvent length (Except the end of pipe)
(A bend is equivalent to 15 feets straight pipe.)
42
6.Exhaust piping installation
qUse only listed category III vent pipe with thiswater heater.
wFollow the vent pipe manufactures installation in-structions.
eApply commercial silicon seal at the joints (jointof exhaust pipe and adapter, joint of adapter andexhaust pipe).
Reference to installation (ex. : Indoor Installation)
Screened outlet
Joint
Elbow
Straight pipe
Elbow
(60mm to 3"adapter)
Sealer
Waterheater
41
3"diameter pipe
※ See next page for max.vent length.
Observe the commercial gas equipment installation criteria and operation criteria. Air inlet
Size the air inlet according to the National FuelGas Code, ANSI Z223.1.
Be sure to provide an air inlet.
The air inlet needs to open to the outside airfrom the room in which the water heater is used.
To install the water heater in a kitchen or aroom with a duct, a volume of air intake equiva-lent to the volume of air going out through theduct is needed, so as not to reduce the airpressure in the room.(When air pressure in the room is reduced,the safety device on the water heater activatesand stops the heater operating.)
43 44
Gas connection Do not use piping with a diameter smaller than
the inlet diameter of the water heater. After connecting the piping, check for gas leak-
age at the inlet. Install a gas shutoff valve on the supply line. Use approved gas piping materials. Use removable connections or hex pipe.
Gas meterSelect a gas meter capable of supplying gas for thewater heater while also supplying gas to other gasequipment.
Follow the instructions from the utility.
Gas valveIf gas is not available in the area where theequipment is to be installed, or if the line is notsized correctly, the gas line will need to be re-worked for this water heater.
Gas pressureSelect gas piping with the appropriate diam-eter and a proper gas meter in order to achievesufficient gas pressure at the inlet of the waterheater during maximum burning.
Natural Gas Pressure inletMin. 3.5" WCMax. 10.5" WC
LP Gas Pressure inletMin. 8" WCMax. 14" WC
7.Gas pipingThe appliance and its individual shutoff valve must be disconnected from the gas supply piping systemduring any pressure testing of that system at test pressures in excess of 1⁄2 psig (3.5 kPa).The Appliance must be isolated from the gas supply piping system by closing its individual manualshutoff valve during any pressure testing of the gas supply piping system at test pressures equal to orless than 1⁄2 psig (3.5 kPa).
The appliance and its gas connections must be leak tested before placing the appliance in operation
1. Turn on gas supply.2. Spray a 10:1 dishwater soap and water solution around all gas connections, and look for bubbles. If
bubble is present, disassemble and apply a liberal amount of sealant.
The inlet gas pressure must be within the range specified. This is for the purposes of input adjustment.
In order to choose the proper size for the gas line, consult local codes or the National Fuel Gas CodeANSI Z223.1.
15"
24"
8"
15"
8"
Caution
Consult qualified electrician for the electricalwork.
Do not turn on the power until the electrical wiring is finished.Otherwise, electric shocks or damage to the equipment will occur.
9.Electric wiring
The power for the water heater is at 120V ACand 60Hz.Check the power consumption indicated on thelabel, and use an appropriate circuit.
Do not do connect the power supply when not inuse. When the power is off, the freeze preven-tion heater in the water heater will not activate,resulting in possible damage from freezing.
Do not let the power cord contact the gas piping.
Tie the redundant power cord outside thewater heater. Do not put the extra length inthe equipment. It may cause a fault in thewater heater.
Ground To prevent an electric shock, provide a ground
with resistance less than 100Ω. An electrical en-gineer should do the work.
The ground terminal is provided at the bottomof the water heater and is explicitly indicated.
Do not connect the ground to the city wateror gas piping. Do not tie the ground to a tele-phone line.
Installation of breaker Mount a device which shuts off the electrical path
automatically (leakage breaker) when leakagefrom electric facilities is detected (based on tech-nical criteria).
This appliance must be electrically grounded in accordance with local codes, or in the absence of localcodes, with the National Electrical Code, ANSI/NFPA 70. In Canada, the latest CSA C22.1 ElectricalCode.
Caution: Label all wires prior to disconnection when servicing controls. Wiring errors can causeimproper and dangerous operation.
Verify proper operation after servicing.
Field wiring to be performed at time of appliance installation.
Rainproofsocket
Ground terminalGround connection screw
Waterheater
Ground line
Ground line
GroundGround connection screw
Waterheater
MaintenanceThe venting system must be examined periodically by a qualified service technician to check for anyleaks or corrosion.The burner flame must be checked periodically for a proper blue color and consistency.If the flame does not appear normal, the burner may need to be cleaned.If the burner needs to be cleaned, it must be performed by a qualified service technician.Do not obstruct the flow of combustion and ventilation air.The pressure relief valve must be operated once a year to ensure that it is functioning properly andthere is no obstruction. Turn the power off to the unit before opening the relief valve, and make surethat water draining out of the valve will not cause any damage.If the relief valve discharges periodically, it may be due to thermal expansion in a closed water system. Contactthe water supplier or a local plumbing inspector on how to correct this situation. Do not plug the relief valve.See Operation Manual for further maintenance.Warning: There is a scald potential if the output temperature is set too high.Should overheating occur, or the gas supply fail to shut off, turn off the manual gas control valve to the appliance.Do not use this appliance if any part has been under water. Immediately call a qualified service techni-cian to inspect the appliance and to replace any part of the control system and any gas control whichhas been under water.
46
8.Supply water and hot water pipingThis appliance suitable for potable water and space heating applications. Do not use this appliance ifany part has been underwater. Immediately call a qualified service technician to inspect the applianceand to replace any part of the control system and gas control which has been under water.
If the water heater is installed in a closed water supply system, such as one having a backflowpreventer in the cold water supply line, means shall be provided to control thermal expansion. Contactthe water supplier or a local plumbing inspector on how to control this situation.
A pressure relief valve must be installed near the hot water outlet that is rated in accordance with andcomplying with either The Standard for Relief Valves and Automatic Shutoff Devices for Hot WaterSupply Systems, ANSI Z21.22, or The ANSI/ASME Boiler and Pressure Vessel Code, Section IV(“Heating Boilers”). This pressure relief valve must be capable of an hourly Btu rated temperaturesteam discharge of 119,000 Btuh. Multiple valves may be used. The pressure relief capacity must notexceed 150 psig. No valve shall be placed between the relief valve and the water heater. The reliefvalve must be installed such that the discharge will be conducted to a suitable place for disposal whenrelief occurs. No reducing coupling or other restriction may be installed in the discharge line. Thedischarge line must be installed to allow complete drainage of both the valve and the line. If this unit isinstalled with a separate storage vessel, the separate vessel must have its own temperature andpressure relief valve. This valve must also comply with The Standard for Relief Valves and AutomaticGas Shutoff Devices for Hot Water Supply Systems, ANSI Z21.22. (in the U.S. only). A temperaturerelief valve is not required, but if one is used, do not install the valve with the probe directly in the flowof water. This may cause unwarranted discharge of the valve.
Piping and components connected to the water heater shall be suitable for use with potable water.Toxic chemicals, such as those used for boiler treatment, shall not be introduced into the potable water.A water heater used to supply potable water may not be connected to any heating system or compo-nents previously used with a nonpotable water heating appliance.When water is required in one part of the system at a higher temperature than in the rest of the sys-tem, means such as a mixing valve shall be installed to temper the water to reduce the scald hazard.
Pass water through the pipe to clean out metal powder, sand and dust before connecting it. Take appropriate heat insulation measures (e.g., wrapping with heat insulation materials, using elec-
tric heaters) according to the climate of the region to prevent the pipe from freezing. Use a union coupling or flexible pipe for connecting the pipes to reduce the force applied to the piping. Do not use piping with a diameter smaller than the coupling. When feed water pressure is too high, insert a depressurizing valve, or take water hammer preven-
tion measure. Avoid using joints as much as possible to keep the piping simple. Avoid piping in which an air holdup can occur.* Use approved piping materials.
Supply water piping Do not use PVC piping with city water. Mount a check valve and a shut off valve (near
the inlet). In order for the client to use the water heater
comfortably, 98.1 to 491 kPa (14 to 70 PSI) ofpressure is needed for water feeding.Be sure to check the water pressure. If thewater pressure is low, the water heater cannotperform to its full capability, and may becomea source of trouble for the client.
Drain piping Expansion water may drop from the pressure
prevention device and wet the floor. If neces-sary, provide drain piping or use a drain hoseto remove the water.
Hot water piping Do not use lead or PVC piping with city water. The longer the piping, the greater the heat loss.
Try to make the piping as short as possible. Use a mixing valve with a low water resistance.
Use a shower head with low pressure loss. If necessary, use a pump or other means to en-
sure that the supply water pressure to the inletof the heater does not fall below 200 kPa whenthe maximum amount of water is being de-manded. Also install a pressure meter on theinlet. If this is not done, local boiling will occurinside the water heater causing abnormalsounds and decreasing the durability of the heatexchanger.
Ask a qualified plumber in theregion for piping and observeplumbing codes
45
(unit: inch)
Dimensional outline drawing
48
(1) Open the hot water supply valve, and check that the combustion indicator comes on, and that hotwater is provided. (If necessary, repeat until the air in the gas piping is bled out).
* If error "11" is indicated, turn the Operation switch off and turn it on again, and open the hot waterplug once more.
(2) Adjust the temperature setting on the remote control and confirm that the water temperature changes.
If the water heater does not operate normally, refer to "Troubleshooting" in the Operation Manual.* After the trial operation, clean the filter on the inlet.
10.Trial operation After installation, test the equipment to confirm thewater heater works properly.
Handling after trial operation
Drain the water for freeze prevention, and close the gas valve and water supply valve.Make sure to drain the water, unless the unit will be used immediately. This is to prevent thewater from freezing and the water heater from being damaged. Follow the instructions in theOwner’s Manual.(Freezing is not covered by the warranty.)
Lighting InstructionsThis water heater does not have a pilot. It is equipped with an ignition device that automatically lights the burner.Do not try to light the burner by hand.1. Read the safety information in the installation manual or on the front of the water heater.2. Turn off all electrical power to the unit.3. Do not attempt to light the burner by hand.4. Turn the gas control manual valve (external to the unit) clockwise to the on position.5. Wait five minutes to clear out any gas. If the smell of gas remains, stop, and follow the instructions on
page 2 of this manual.6. Turn the gas control manual valve counterclockwise to the on position.7. Turn on electric power to the unit.8. The unit will now operate whenever hot water is called for. If the unit will not operate, follow the
shutdown instructions and call a service technician.
Shutdown Instructions1. Stop any water demand.2. Turn off electric power.3. Turn the gas control manual valve clockwise to the off position.
Preparation ........... (1) Open the shut off valve on the water supply, check that water passes throughthe valve and close the valve.
(2) Open the gas supply valve, turn on the power supply, and turn on the Opera-tion switch on the remote controller (the Operation lamp turns on).
Caution
475740
107
4.31.5
1.6
3.8
COLD WATER INLET 3/4 in. NPT
HOT WATER OUTLET3/4 in. NPT
GAS INLET 1/2 in. NPT
20.5
1.7
1.9
21.3
19.2
0.40.4
2.44.7
3.3
AIR INLET
HOLE FOR APPLIANCE INSTALLATION
0.4
1.2
4.7
3.3 6.7
2.6
OPERATION PANEL
1.9
EXHAUST PIPE FITTING PART
13.1
13.8
13.3
HOLE FOR APPLIANCE INSTALLATION
ELE. WIRE OUTLET
(FROM TOP SIDE VIEW)
BOTTOM OFCASE BOTTOM OF CASE
WATER FLOW
CONTROL DEVICE
(GND)
(Fully open)
(Vcc)
(Vcc)
LS SM
BL Y W O G BK V
RVBKGOWY
R
BL
THERMAL FUSE
FLAME ROD
WATER FLOW
SENSOR
WATER INLET
THERMISTOR
WATER OUTLET
THERMISTOR
FAN MOTOR
BL
RBLYBL
BL
WW
BL
BL
BL
BL
BL
BL
Y R BL/W
Y R BL
PLSVccGND
W W W W
W W W W
QS
FM
VccGND
FGVs
RBLYBR
WGY
BL
BLBKR
WWW
BK
G
R BL
BL
BLBL
BL/R
BL/R R R R
GAS VALVE UNIT
W BL
BKBL
BLGY
R(+)
BL(-)
MAIN CIRCUIT
BOARD
W BK
W WW W
GROUND
ELECTRODE
HIGH-LIMIT SWITCH
CURRENT
LEAKAGE
SAFETY DEVICE
TRANSFORMER
BR : Brown
Y : Yellow
W : White
R : Red
BL : Blue
GY : Gray
O : Orange
V : Violet
BK : Black
COLOR CODING
G : Green
FROST SENSING
SWITCH
<AC120V>
ANTI-FROST HEATER
BK W
W BL
W BL
W BK
W BK
Push Button(High Capacity)
Push Button(Low Capacity)
Secondary Gas Pressure Adjustment Button(DOWN)
Secondary Gas Pressure Adjustment Button(UP)
W W W W
GYW
W W WW W W
W WGY
GY
WIRING DIAGRAM
<N-063 Model Only>
<N-042 Model Only>
<CN75>
<CN10>
<CN1>
<CN27>
<CN210>
<CN86>
<CN78><CN59>
<CN89A>
<CN89B>
<CN92B>
<CN92A>
GROUND
<N-063 Model Only>
BLBL
１
４ ８
３
７
５ ６ ２ １
６
７
８
３
５４１
２
50121110
46
２
１
１
２
１
２
２
１
１２３５
４６
ＩＧ
４
２
１３
４３１
２
２
３
１
１
２
２
１
３
１
１
７
２
１３５
４６８
２
３
１
３
２
１
REMOTE CONTROLLER
RC-7646M
１
２
４
３
２
１６
５
DU
SV2
SV0
SV1
２
３
１
２
１
REMOTE CONTROLLER
RC-7646M
49 50
10A(FUSE)
NEUTRALHOT
SECONDARY
PRIMARYAC120V
AC100V
VARISTORARRESTER
GND
RELAY 2 IGNITER
SOLENOID VALVE 0RELAY 4
RELAY 3
RELAY 1
DC90VSOLENOID VALVE 1
SOLENOID VALVE 2
HIGH LIMITSWITCH
ANTI-FROST HEATER
VARISTOR
FROST SENSINGSWITCH
DC90V
DC140V DC140V
IG
SV0
SV1
SV2
POWER CONTROLLER FAN COMBUTION FAN
A B
C
DC15V(1)
SECONDARY
DC15V(2)
15V POWER CIRCUIT
WATER FLOW SENSOR
WATER FLOW SERVO
THERMAL FUSE RELAY 1
RELAYDRIVINGCIRCUIT
RELAY 2
RELAY 4
PRIMARY
CPU
CENTRALPROCESSING UNIT
FANPULSECONTROL CIRCUIT
A B
C
INPUT ANDOUTPUT PULSE
GAS PROPORTION VALVEPOWER CONTROL CIRCUIT
DU
FLAME DETECTING CIRCUIT
FR GND
5V POWER CIRCUIT
WATER OUTLET THERMISTOR
WATER INLET THERMISTOR
FRAME ROD
(N-063 ONLY)
RELAY 3
5251
