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Troubleshooting

Chapter 5. – Troubleshooting

Troubleshooting

Problem

Possible Remedies

Burner Does Not Ignite

•

Make sure that the ON/OFF button on the Control Panel is ON.

•

If the display on the Control Panel is blank, make sure the power cord is plugged in

and 3A fuses on the main controller in the water heater are good. Power switch

inside water heater is on.

•

Make sure that the water heater is supplied with water. The unit activates when inlet

water flow sensor detects flow over 0.5 gpm

•

Make sure the cold and hot water lines are not plumbed in reverse.

•

Ensure the cold water and gas supply lines are open.

•

Make sure the water lines are not frozen.

Water is Not Hot Enough

•

Ensure the temperature setting on the water heater is not too low.

• Ensure the filter in the cold water supply line is not clogged with debris.

•

Make sure the water heater is connected to the correct gas supply.

Water is Too Hot

•

Ensure the temperature setting is not too hot.

• Ensure the filter in the cold water supply line is not clogged with debris.

•

Make sure the water heater is connected to the correct gas supply.

Hot Water Temperature Fluctu-

ates at Tap

• Ensure the filter in the cold water supply line is not clogged with debris.

•

Make sure the water heater is connected to the correct gas supply.

The Blower Continues to Oper-

ate After Combustion Stops

•

This is normal. The blower operates for one minute after combustion has stopped to

purge remaining exhaust gas from the flue.

Cannot Change the Hot Water

Mode Setpoint above 120

℉

•

This is a safety device to prevent scalding. Hot water temperature over 125

℉

can

cause instant severe burns or death.

The Water Heater Makes Abnor-

mal Sounds During Operation

•

Ensure the venting installation complies with the installation manual.

• Ensure supply gas pressure is sufficient. Insufficient gas pressure will cause unstable

burner flame and noise.

Water Quality

Damage to the water heater as a result of poor water quality is not covered by the Limited Warranty. To ensure full warranty

coverage, treat or condition water that exceeds the target levels provided in this table.

(

Source: EPA National Secondary Drinking Water)

Total Hardness*

200 mg/L (12 gpg) or less

Aluminum

0.05 to 0.2 mg/L or less

Chloride

250 mg/L or less

Copper

1 mg/L or less

Iron

0.3 mg/L or less

Manganese

0.05 mg/L or less

6.5 - 8.5

Total Dissolved Solids

500 mg/L or less

Zinc

5 mg/L or less

Sulfate ion

250 mg/L or less

Residual chlorine

4 mg/L or less

* Maximum limit suggested by Noritz.

Содержание NRCP1112-DV

Страница 1: ...formation in these instructions is not followed exactly a fire or explosion may result causing property damage personal injury or death Models CONDENSING TANKLESS GAS WATER HEATER Thank you for purchasing this Noritz Tankless Gas Water Heater Before using please Read this guide completely for operation instructions Completely fill out the warranty registration card included separately and mail the...

Страница 2: ...History 19 5 How to check the Running History 20 6 Setting the Unit 21 7 Recirculation Timer Setup Recirculation Mode 22 Recirculation _Auto Mode 24 Recirculation_Program Mode 25 Recirculation Initialization 27 8 Setting the Recirculation System 28 External or Internal Setting 29 Recirculation water temperature Setting 30 9 Preventing Damage form Freezing 1 32 10 Preventing Damage form Freezing 2 ...

Страница 3: ...er as it passes through the secondary heat exchanger as illustrated below The recirculation pipe must be installed in the field in order to apply the External Recirculation Mode This mode allows the water heater recirculation pipes to be warmed up and serving as the freeze protection function This mode is available without a recirculation pipe installed The water heater is preheated and protected ...

Страница 4: ...NG FOR YOUR SAFETY READ BEFORE OPERATING If you do not follow these instructions exactly a fire or explosion could result causing property damage personal injury or loss of life A This appliance does not have a pilot It is equipped with an ignition device which automatically lights the burner Do not try to light the burner by hand B BEFORE OPERATING smell all around the appliance area for gas Be s...

Страница 5: ... products such as gasoline solvents or adhesives in the same room or area near the appliance Keep flammable products Far away from Water Heater In approved containers Tightly closed Out of children s reach Vapors Cannot be seen Vapors are heavier than air Go a long way on the floor Can be carried from other rooms to the main burner by air currents Do not install the appliance where flammable produ...

Страница 6: ...ondensate trap control replacement etc PRODUCTS TO AVOID AREAS LIKELY TO HAVE CONTAMINANTS Spray cans containing fluorocarbons Dry cleaning laundry areas and establishments Permanent wave solutions Swimming pools Chlorinated waxes cleaners Metal fabrication plants Chlorine based swimming pool chemicals Beauty shops Calcium chloride used for thawing Refrigeration repair shops Sodium chloride used f...

Страница 7: ...ype of gas is indicated on the rating plate on side of the water heater 3 Check the gas valve Please confirm the gas valve connected to the water heater it must be closed during installation 4 Check the water supply valve Please leave the appliance water supply valve open at all times it must be closed during installation 120V 60Hz open Before Operation 2 Check the electricity being supplied Pleas...

Страница 8: ...mbustible inflammable materials such as papers Do not hang clothes on the exhaust vent Otherwise fire may break out CAUTION Pull out the power plug from the receptacle if light ning strikes Lightning can damage the water heater Pull out power cord plug if lightning strikes for your safety Burn Protection Be cautious when opening the hot water tap The water may be very hot Especially children disab...

Страница 9: ...y electrical switch do not use any phone in your building 3 Immediately call your gas supplier from a neighbor s phone Follow the gas supplier s instructions 4 If you cannot reach your gas supplier call the fire department Gas leakage test Gas supply line must be inspected regularly If air bubbles appear in soap water test the gas is leaking out Close the gas supply valve and call your gas supplie...

Страница 10: ... When in Operation Chapter 2 Safety Regulations Do not shut off the Water Heater When you leave home for a long time do not shut off the Water Heater The Water Heater has a freeze protection function The freeze protection feature will not work if electrical power gas or water is disconnected Do not wipe the appliance or control panel with wet cloth Otherwise electric shock may occur or internal pa...

Страница 11: ...y Check ignition during use and extinction after use Do not run water through the unit when unit is not on When discharging hot water make sure the unit is ON If water is run through the unit with the unit OFF water may condense inside the unit and cause incomplete combustion or damage to the internal electrical components Preventing damage from freezing Damage can occur from frozen water within t...

Страница 12: ...Gas Supply Full port gas valve Pressure Relief Valve Recirculation water line Hot water line Cold water line 1 Open the water pipe valve 2 Open a hot water fixture faucet to confirm that water is available and then close the fixture faucet again 3 Open the gas supply valve 4 Turn on the power on the front panel Do not touch with wet hands ...

Страница 13: ...uttons Functionality Press Press and Hold more than 5 seconds Power ON OFF Button Control Panel Power ON OFF N A Function Button Cancel Return Status display mode at power ON Installer mode at power OFF Hot Water Temperature Button Hot water temperature setting 100 F 120 F 38 C 49 C with 5 F interval High temperature setting 125 F 140 F 51 5 C 60 C with 5 F interval Recirculation Timer Button Time...

Страница 14: ... TIME AM 1 39 CURRENT DAY MONDAY TIMER SETTING MONDAY 5 00 6 00 18 00 19 30 DESIRED HOT WATER TEMPERATURE 120 F Pump Operating Icon Example External Recirculation Icon Status Display High Temperature Icon Temperature Unit Lock Mode Communication Status Combustion Icon Control Panel LCD Interface LCD has a backlight that will illuminate When a user action is detected a button is pressed Turns off w...

Страница 15: ...setting 1 Setting year 2014 Set the Year by turning the dial button Only the flashing number can be changed Set the month by turning the dial button Only the flashing number can be changed Customer can set the current date time and day in L TA mode Press and hold Function Button for approxi mately 5 Seconds to enter User mode Power must be ON on the Display Enter the clock Setting mode by pressing...

Страница 16: ...g minute 20 4 Setting day of the week Friday Set the day by turning the dial button Only the flashing number can be changed Set the hour by turning the dial button Only the flashing number can be changed Set the minute by turning the dial button Only the flashing number can be changed Set the day of the week by turning the dial button Only the flashing number can be changed Press Function Button t...

Страница 17: ...10 115 120 125 130 135 140 Default 38 40 5 43 5 46 49 51 5 54 5 57 60 The operation of the high temperature hot water can be set separately High temperature range Press the Dial Button to store the setting General temperature range 2 Setting Hot Water Temperature The temperature settings below are examples The temperature setting necessary depends on the usage the length of piping and the time of ...

Страница 18: ... History PLUG bnHr igCY PPHr K FC Gallon or Liter Unit GAL Lit L TA Timer Adjustment Current Timer setting Function can be checked and set in User mode C TL I EH J RH K FC L TA User Mode confirmation function 2 Press and hold Function Button for ap proximately 5 Seconds to enter User mode 1 Press the Power Button ON 3 A GA is displayed on the Display screen From here turn the dial button to start ...

Страница 19: ...H Refer to page 18 User mode setting method and set to User mode Function can be checked by turning the dial button Refer to page 18 User Mode setting method and set to User mode Function can be checked by turning the dial button 1 Select the C TL mode by turning the Dial Button in User Mode 2 Lock Mode is started and oFF character is flashing when the Dial Button pressed in C TL mode 3 Select the...

Страница 20: ...1000 4 307 000 times 3 Turn the Dial Button clockwise to be changed to bhHr mode 4 Turn the Dial Button clockwise to be changed to bnCY mode 5 Turn the Dial Button clockwise to be changed to PPHr mode 6 Press the Dial Button to return to User mode Running History mode Screen Display Operation Description PLUG Power on time EX 102 8 102 8 X 1000 102 800 hour bnHR Combustion time EX 31 07 31 07 X 10...

Страница 21: ...ess Dial Button And return to User mode 2 If Dial Button is pressed in K FC GAL character is flashing If flashing character is GAL units dis played on the display screen are GPM and Fahrenheit Screen Display Operation Description Unit Gallon Fahrenheit All of the units displayed on the display screen are GPM F Unit Liter Celsius All of the units displayed on the display screen are LPM C 6 Setting ...

Страница 22: ...nction Button to exit Installer Mode Default times are 5 8 am and 5 11 pm for recirculation timer mode Customer who accept the default times do not need to do Recirculation Timer setting in the following section Activation of the Recirculation Timer icon on the main screen indicates feature activation 2 oFF character is flashing when the Dial Button is pressed in 1 RC mode Default setting is oFF a...

Страница 23: ... Time Refer to the 25 26 page for details STEP 3 Recirculation Timer function initialization setting Prog or Auto Recirculation timer function initialization Refer to the 27 page for details How to use Control Panel User mode Chapter 3 Unit Operation Table for Recirculation Timer setting Recirculation Timer function has three settings Act SEt cLc Act mode is to set the Recirculation Timer Set mode...

Страница 24: ...ton clockwise to set the program Then press the Dial Button to set 4 A Pre reserved day and time are displayed when program function is selected Auto Function If flame is detected by customer usage that time is stored The following day the water pattern from the previous day is used to control the pre heat and provide prompt hot water 4 B Recirculation function is operated from next day after auto...

Страница 25: ... press Dial Button to enter the Setting mode 3 1 Set the day in Prog mode by turning the Dial Button 3 3 Turn the Dial Button until next desired day appears on display screen Repeat this step for more days 3 2 If desired day appears on the display screen press the Dial Button to select and store 3 4 Press the Dial Button to store when desired days are displayed Press and hold Dial Button for appro...

Страница 26: ...n to return to initial mode TIP for the Recirculation Timer Press the dial button less than 1 second Selecting a start time and an end time Turn the dial button selecting a number of times Press the dial button more than 2 seconds storing the reservation time setting 4 4 Press the Dial Button for approximately 2 Seconds to store ex Setting time 4 30 6 00 12 00 14 00 17 00 17 30 4 3 Turn the Dial B...

Страница 27: ...etting when the Prog character is flashing on the display screen 4A 2 Press the Recirculation Timer Button to return to the previous step after setting completion 4B 1 Turn the Dial Button to Auto flashes Then press the Dial Button to initialize the auto recirculation setting 4B 2 Press the dial button to complete the initialization setting for initializing the auto reservation setting when the Au...

Страница 28: ...sure hot water is remove the word instantly Recirculation timer setting can be changed to meet customer s desired schedule Auto self learning mode function can be selected by customer s need Pressure Relief Valve Air Gas Mixing Primary heat exchanger Secondary heat exchanger Burner Recirculation Line Expansion Tank Install according to local code Recirculation Pump Condensate Hose Gas Hot Water Ou...

Страница 29: ...ion function Pressure Relief Valve Air Gas Mixing Primary heat exchanger Secondary heat exchanger Burner Recirculation Line Expansion Tank Install according to local code Recirculation Pump Condensate Hose Gas Hot Water Outlet Cold Water Inlet Internal recirculation mode can be used even with external recirculation pipe installed if user wants to save energy cost Must set water heater to internal ...

Страница 30: ...dial button clockwise to select on in order to activate the recirculation function 5 Press the dial button to store the current setting and return back to Installer mode 6 Locate 2 RM by turning the dial button clockwise by one click 7 Press the dial button when the flashing 2 RM 8 Turn the dial button to select Etnl External Recirculation Mode or Itnl Internal Recirculation Mode Screen Display Op...

Страница 31: ...0 C it will stop After combustion mode is stopped the pump will continue for 3 minutes If the water heater is turned on for recirculation mode pre heating mode or hot water use mode the freeze protection mode will automatically stop With the recirculation operation set hot water will be automatically circulated in the hot water pipes If the recirculation piping is installed you can select the exte...

Страница 32: ...r fixtures faucets for more than 2 minute and close If multiple units are being used drain two minutes for each unit An 11 Error Code may appear on the control panel This is not a malfunction of the unit Do not turn Power ON OFF Button OFF 3 Close the water supply valve and disconnect the electrical power supplied to the unit 4 Fully open all hot water fixtures faucets 5 Open all drain plugs and d...

Страница 33: ...ondensate will begin to discharge from the drain pipe within 15 minutes of use However depending on the season and or installation site conditions it may take longer If water does not appear at the end of the drain line a qualified service technician must clean the condensate line After the water heater has been out of use for a long time make sure that you fill the condensate trap with water This...

Страница 34: ...arly Check vent terminal bird screen If you encounter a problem of combustion specifications visu ally inspect the terminal screen And then replace it with spare parts or clean the screens Maintenance procedures Check installation location To prevent potential severe personal injury death or substan tial property damage remove all contaminated materials If contaminants are found Remove products im...

Страница 35: ...ll the filter out of the air intake adapter 6 Clean it with a toothbrush and clean running water 7 Dry the filter completely Then reinsert the filter into the plastic assembly and tighten the filter screen screw 8 Replace the front cover of the water heater cabinet Reconnect power supply to the water heater 9 Press the Power button on the control panel to turn on the water heater Maintaining the W...

Страница 36: ...then turn off the gas valve 3 Close water supply valve on the inlet to the appliance 4 Open the hot water faucets completely Maintaining the Water Heater Chapter 4 Maintenance 6 To refill the water heater follow the steps of Draining the Water Heater in reverse Cold Water Filter 5 Remove the cold water inlet filter and recirculation water filter And then clean it with a toothbrush and clean runnin...

Страница 37: ...ater Maintenance procedures Annually Check piping gas and water Visually inspect for leaks around internal water piping Also inspect external water piping circulators pressure relief valve and fittings Immediately call a qualified service technician to repair any leaks Leaks must be fixed by a qualified service technician immediately Failure to comply with this instruction could result in severe p...

Страница 38: ...heck condition of the burner assembly If the problem persists replace the circuit board Er 44 Recirculation Abnormality Verify recirculation loop length is within specification Check return line filter Check the pump operation Er 45 Water leakage is detected in water heater Press the Power button to clear the Error Code If error code still appears on the display then check the following Check for ...

Страница 39: ...e the filter in the cold water supply line is not clogged with debris Make sure the water heater is connected to the correct gas supply The Blower Continues to Oper ate After Combustion Stops This is normal The blower operates for one minute after combustion has stopped to purge remaining exhaust gas from the flue Cannot Change the Hot Water Mode Setpoint above 120 This is a safety device to preve...

Страница 40: ...arately Be sure that the plumber 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 only be performed if the unit is deemed repairable Period of Time for Stocking Repair Parts Noritz will stock repair and maintenance parts for this...

Страница 41: ...41 Memo ...

Страница 42: ...Owner s Guide NORITZ AMERICA CO 11160 Grace Avenue Fountain Valley CA 92708 Phone 866 766 7489 ...

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