Noritz N-0531S Field Manual
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Noritz N-0531S Field Manual

Noritz N-0531S Field Manual

Gas water heater
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N-0531S (-OD)
N-0631S (-OD)
N-0751M (-DV, -OD, -DVC)
N-0931M (-DV, -OD)
N-0841MC (-DV)
N-1321M-ASME
Field Manual
The materials in this manual are presented for reference
only. For further assistance, contact Noritz Technica l
Support at 866-766-7489.
be changed without prior notice.
Do not short circuit any safety
device on this appliance
Important Safety Information .........................................................................................................................................
1. Features ...........................................................................................................................................................................
2.
3. Dimensions ....................................................................................................................................................................
4. Components .................................................................................................................................................................
5. Troubleshooting ..........................................................................................................................................................
Error Codes and Checkpoints ............................................................................................................................
Remote Controller .................................................................................................................................................
Displaying Maintenance Monitor ....................................................................................................................
Maintenance Monitor List ...................................................................................................................................
Neutralizer Life Cycle Warning/Replacement Procedures.......................................................................
Gas Line Requirements ........................................................................................................................................
Periodic Inspection ................................................................................................................................................
Periodic Maintenance ..........................................................................................................................................
Changing Default Temperature Setting .........................................................................................................
Draining Water for Maintenance or Freeze Protection ............................................................................
6. Installation Check .......................................................................................................................................................
NORITZ America Corporation
Contents
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1
Gas Water Heater
Rev: Jan, 2009
2
3
5
20
29
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58

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Summary of Contents for Noritz N-0531S

  • Page 1: Table Of Contents

    N-0841MC (-DV) N-1321M-ASME Field Manual The materials in this manual are presented for reference only. For further assistance, contact Noritz Technica l Support at 866-766-7489. be changed without prior notice. Do not short circuit any safety device on this appliance Contents Important Safety Information ............................

  • Page 2: Important Safety Information

    Caution belt whenever necessary. Use only the appropriate tools and parts: Only use replacement parts manufactured by Noritz for this model as listed in the Warning Installation Manual Parts List for service on this unit. Use appropriate tools. Modification of the unit is prohibited: Do not attempt to modify or alter the unit.

  • Page 3: Features

    1. Features 1. Quick Connect Multi System (For N-0751M series, N-0931M series, N-0841MC series, and N-1321M-ASME only) Allows the simple installation of up to 2 units linked together using a Quick Connect Cord CCP Valve Not required System Controller 2. Secondary Recirculation Pump in a Multi-System (For N-0931M series, N-0841MC series, and N-1321M-ASME only) T wo recirculation pumps can be connected to the multi-system controller to provide a rotational pump system.
  • Page 4 Overview of Condensing Tankless Gas Water Heater This water heater is a high efficiency, fully condensing appliance. Unlike a traditional tankless water heater, a condensing type captures heat from the exhaust gas and uses it to preheat the incoming cold water as it passes through the secondary heat exchanger as illustrated below.
  • Page 5 N-0531S (-OD) Item Model Name N-0531S-OD N-0531S Installation Type Indoor/ Outdoor, Wall Mounted Outdoor, Wall Mounted Air Supply/Exhaust Po wer Vented Ignition Direct Ignition Operating Pressure 15-150 psi Minimum Flow Rate 0.5 GPM Dimensions 20.5"(Height) x 13.8"(Width) x 6.7"(Depth) Weight 36 lbs.
  • Page 6 N-0631S (-OD) Item Model Name N-0631S-OD N-0631S Indoor/ Outdoor, Wall Mounted Outdoor, Wall Mounted Type Installation Air Supply/Exhaust Po wer Vented Ignition Direct Ignition Operating Pressure 15-150 psi Minimum Flow Rate 0.5 GPM Dimensions 23.6"(Height) x 13.8"(Width) x 6.7"(Depth) Weight 41 lbs.
  • Page 7 N-0751M Item Model Name N-0751M Indoor/ Outdoor, Wall Mounted Type Installation Air Supply/Exhaust Po wer Vented Ignition Direct Ignition Operating Pressure 15-150 psi Minimum Flow Rate 0.5 GPM Dimensions 23.6"(Height) x 13.8"(Width) x 9.4"(Depth) Weight 47 lbs. Water Holding Capacity 0.2 Gallon Connection Sizes Water Inlet...
  • Page 8 N-0751M-DV Item Model Name N-0751M-DV Indoor, Wall Mounted Type Installation Po wer Vented Air Supply/Exhaust Ignition Direct Ignition Operating Pressure 15-150 psi Minimum Flow Rate 0.5 GPM Dimensions 24.2"(Height) x 18.3"(Width) x 9.4"(Depth) Weight 54 lbs. Water Holding Capacity 0.2 Gallon Connection Sizes Water Inlet 3/4"...
  • Page 9 N-0751M-OD Item Specification Model Name N-0751M-OD Type Installation Outdoor, Wall Mounted Air Supply/Exhaust Power Vented Ignition Direct Ignition Operating Pressure 15-150 psi Minimum Flow Rate 0.5 GPM Dimensions 23.6"(Height) x 13.8"(Width) x 9.4"(Depth) Weight 47 lbs. Water Holding Capacity 0.2 Gallon Connection Sizes Water Inlet 3/4"...
  • Page 10 N-0751M-DVC Item Specification Model Name N-0751M-DVC Installation Indoor, Wall Mounted Type Air Supply/Exhaust Po wer Vented Ignition Direct Ignition Operating Pressure 15-150 psi Minimum Flow Rate 0.5 GPM Dimensions 23.6"(Height) x 13.8"(Width) x 10.2"(Depth) Weight 55 lbs. Water Holding Capacity 0.2 Gallon Connection Sizes Water Inlet...
  • Page 11 N-0931M Item Model Name N-0931M Installation Type Indoor/ Outdoor, Wall Mounted Air Supply/Exhaust Power Vented Ignition Direct Ignition Operating Pressure 15-150 psi Minimum Flow Rate 0.5 GPM Dimensions 24.2"(Height) x 18.3"(Width) x 9.4"(Depth) Weight 62 lbs. Water Holding Capacity 0.3 Gallon Connection Sizes Water Inlet 3/4"...
  • Page 12 N-0931M-DV Item Model Name N-0931M-DV Installation Indoor Wall Mounted Type Air Supply/Exhaust Po wer Vented Ignition Direct Ignition Operating Pressure 15-150 psi Minimum Flow Rate 0.5 GPM Dimensions 24.2"(Height) x 18.3"(Width) x 9.4"(Depth) Weight 62 lbs. Water Holding Capacity 0.3 Gallon Connection Sizes Water Inlet 3/4"...
  • Page 13 N-0931M-OD Item Model Name N-0931M-OD Type Installation Outdoor, Wall Mounted Air Supply/Exhaust Po wer Vented Ignition Direct Ignition Operating Pressure 15-150 psi Minimum Flow Rate 0.5 GPM Dimensions 24.2"(Height) x 18.3"(Width) x 9.4"(Depth) Weight 62 lbs. Water Holding Capacity 0.3 Gallon Connection Sizes Water Inlet 3/4"...
  • Page 14 N-0841MC (-DV) Item Model Name N-0841MC N-0841MC-DV Indoor, Wall Mounted Type Installation Indoor/ Outdoor, Wall Mounted Air Supply/Exhaust Power Vented Ignition Direct Ignition Operating Pressure 15-150 psi Minimum Flow Rate 0.5 GPM Dimensions 24.4"(Height) x 18.4"(Width) x 9.4"(Depth) Weight 73 lbs. Water Holding Capacity 0.5 Gallon Connection Sizes...
  • Page 15 N-1321M-ASME Item Model Name N-1321M-ASME Installation Type Indoor/ Outdoor, Wall Mounted Air Supply/Exhaust Power Vented Ignition Direct Ignition Operating Pressure 15-150 psi Minimum Flow Rate 0.7 GPM Dimensions 29.7"(Height) x 19.1"(Width) x 11.8"(Depth) Weight 105 lbs. Water Holding Capacity 0.6 Gallon Connection Sizes Water Inlet 1"...
  • Page 16 Hot Water Supply Capabillities N-0531S (-OD) I ] l [Summer] Inlet water temp. 82 F Flow Rate (GPM) Flow Rate (GPM) Flow Rate (GPM) N-0631S (-OD) [Winter] Inlet water temp. 46 F [Spring/Fall] Inlet water temp. 64 F [Summer] Inlet water temp. 82 F...
  • Page 17 N-1321M-ASME I ] l [Summer] Inlet water temp. 82 F Flow Rate (GPM) Flow Rate (GPM) Flow Rate (GPM) Pressure Loss Characteristics N-0531S (-OD) Flow Rate (gpm) N-0631S (-OD) Flow Rate (gpm)
  • Page 18 N-0751M (-DV, -OD, -DVC) Flow rates shown will vary slightly depending on the incoming water temperature and the setting temperature on the remote controller. Bypass Closed Set temperature: 60.0 145 F or higher Bypass Open Set temperature: 140 F or less 50.0 40.0 30.0...
  • Page 19 N-0841MC (-DV) Set temperature: 130 °F or less (Storage Tank Setting w/ System Controller: 160 °F or less) Set temperature: 135°F or higher (Storage Tank Setting w/ System Controller: 170~180°F) 10.0 11.0 12.0 Flow Rate (GPM) N-1321M-ASME Set temperature: 140°F or less (Storage Tank Setting w/ System Controller: 160°F or less) Set temperature: 145°F or higher...

  • Page 20: Dimensions

    3. Dimensions N-0531S (VIEW FROM TOP) 10.0" 7.0" 4.3" 1.5" 13.3" HOT WATER OUTLET(3/4") GAS INLET (3/4") COLD WATER INLET(3/4") 7.2" WIRING THROUGHWAYS 13.8" 0.4" 6.7" 13.1" 4.7" 3" 3.0" FLUE COLLAR UPPER WALL MOUNT BRACKETS 4.7" AIR INLET 2.4"...
  • Page 21 N-0631S 13.3" (VIEW FROM TOP) 4- 0.5" 10.5" 7.8" 2-0.3" x 0.5" 0.4" 6.7" 13.8" 6.2" OBLONG HOLE 3" 1.4" 13.1" 4.7" 4" 1.1" FLUE COLLAR HOT WATER OUTLET(3/4") 2.0" GAS INLET (3/4") COLD WATER INLET(3/4") 3.3" WIRING THROUGHWAYS 1.7" AIR INLET HEGHT OF EACH FITTINGS FROM BOTTOM OF CASE...
  • Page 22 N-0751M < inch> 13.2" (VIEW FROM TOP) 4- 0.5" 10.3" 2-0.3 x 0.5" 7.1" OBLONG HOLE 1.4" 13.8" 0.4" 9.4" 4.7" 13.1" 3.3" 1.1" 3.7" 2.0" 4" FLUE COLLAR HOT WATER OUTLET (3/4") GAS INLET (3/4") WIRING THROUGHWAY COLD WATER INLET (3/4") 3.1"...
  • Page 23 N-0751M-OD 13.2" < inch > (VIEW FROM TOP) 10.3" 7.1" 4- 0.5" 2-0.3 x 0.5" OBLONG HOLE 1.4" 13.8" 4.7" 13.1" 3.3" 8.6" 2.9" 2.0" 0.4" 9.4" 0.4" 1.1" FLUE COLLAR HOT WATER OUTLET (3/4") GAS INLET (3/4") WIRING THROUGHWAY COLD WATER INLET (3/4") 3.1"...
  • Page 24 N-0931M 17.7" < inch > HEIGHT OF EACH FITTINGS 4- 0.5" FROM BOTTOM OF CASE 6-0.24 x 0.4" OBLONG HOLE N-0931M 1.7" HOT WATER OUTLET 18.3" 6.7" 2.2" COLD WATER INLET 5.5" 17.6" 0.4" 9.4" 3.9" 4" FLUE COLLAR " 2 2.8"...
  • Page 25 N-0931M- OD 17.7" < inch > HEIGHT OF EACH FITTINGS FROM BOTTOM OF CASE 4- 0.5" N-0931M-OD 6 - 0.24 x 0.4" OBLONG HOLE 1.7" WATER OUTLET 6.7" 5.5" 2.2" WATER INLET 18.3" 3.9" " 2 2.8" 17.6" 1.4" 10.6" 3.2"...
  • Page 26 N-0841MC 17.7" (VIEW FROM TOP) 4- 0.5" 13.7" 6-0.24 x 0.4" OBLONG HOLE WIRING THOROUGHWAY (AC120VAC) 10.4" 6.7" 10.0" 5.5" 0.4" 9.4" 8.4" 18.4" 3.9" FLUE COLLAR 3.9" 5.1" 17.6" 2.8" 4" 1.1" 1.4" HOT WATER OUTLET(3/4") CONDENSATE DRAIN (1/2") GAS INLET(3/4") WIRING THOROUGHWAY WIRING THOROUGHWAY...
  • Page 27 N-1321M-ASME HEIGHT OF EACH FITTING FROM BOTTOM OF CASE HOT WATER OUTLET 2.6" COLD WATER INLET 3.4" GAS INLET 2.0"...
  • Page 28 RC-7649M (Optional for N-0531S (-OD), N-0631S (-OD)) 5.0" 0.8" RC-7650M (Optional Canadian Version) 5.0" 0.8"...

  • Page 29: Components

    4. Components N-0531S Heat Exchanger Exhaust Flue Anti-Frost Heater Frost Sensing Switch High-Limit Switch Flame Rod Thermal Fuse Ignition Electrode Manifold Igniter Gas Valve Unit Circuit Board Flow Control Valve Anti-Frost Heater Hot Water Outlet Water Filter Gas Inlet Cold Water Inlet...
  • Page 30 N-0531S-OD Exhaust Terminal Anti-Frost Heater Heat Exchanger High-Limit Switch Thermal Fuse Flame Rod Ignition Electrode Manifold Igniter Fan Motor Gas Valve Unit Circuit Board Flow Control Valve Anti-Frost Heater Water Flow Sensor Gas Inlet Hot Water Outlet Cold Water Inlet Water Drain Valve G.F.C.I...
  • Page 31 N-0631S Exhaust Flue Heat Exchanger Frost Sensing Switch High-Limit Switch Anti-Frost Heater Flame Rod Thermal Fuse Ignition Electrode Burning LED Manifold Igniter Fan Motor Transformer Gas Valve Unit Water Flow Sensor Circuit Board Frost Sensing Switch Flow Control Valve G.F.C.I. Anti-Frost Heater Junction Box Gas Inlet...
  • Page 32 N-0631S-OD Exhaust Terminal Heat Exchanger High-Limit Switch Anti-Frost Heater Flame Rod Thermal Fuse Ignition Electrode Burning LED Manifold Igniter Fan Motor Transformer Gas Valve Unit Water Flow Sensor Circuit Board Frost Sensing Switch Flow Control Valve G.F.C.I. Anti-Frost Heater Junction Box Gas Inlet Hot Water outlet Cold Water Inlet...
  • Page 33 N-0751M Exhaust Flue Heat Exchanger Thermal Fuse High Limit Switch Heat Exchanger Thermistor Anti-Frost Heater Flame Rod Igniter Ignition Electrode Manifold Circuit Board Fan Motor Transformer Water Flow Sensor Bypass Flow Control Valve Main Flow Control Valve Current Leakage Safety Device(GFCI) Junction Box Remote Controller Terminal Block...
  • Page 34 N-0751M-DV Air Inlet Exhaust Flue Heat Exchanger Thermal Fuse Heat Exchanger High Limit Switch Thermistor Anti-Frost Heater Flame Rod Igniter Manifold Ignition Electrode Circuit Board Fan Motor Gas Valve Mechanism Transformer Water Flow Sensor Bypass Flow Control Valve Current Leakage Main Flow Control Valve Safety Device(GFCI) Junction Box...
  • Page 35 N-0751M-OD Heat Exchanger Exhaust Flue Thermal Fuse High Limit Switch Heat Exchanger Thermistor Anti-Frost Heater Flame Rod Igniter Ignition Electrode Manifold Circuit Board Fan Motor Transformer Water Flow Sensor Bypass Flow Control Valve Current Leakage Main Flow Control Valve Safety Device(GFCI) Junction Box Remote Controller Terminal Block...
  • Page 36 N-0751M-DVC Flue Collar Air Inlet Igniter Heat Exchanger High Limit Switch Heat Exchanger Anti-Frost Heater Thermistor Manifold Thermal Fuse Circuit Board Flame Rod Water Flow Sensor Current Leakage Fan Motor Safety Device(GFCI) Main Flow Control Valve Transformer Bypass Flow Control Valve Anti-Frost Heater Anti-Frost Heater Hot Water Outlet...
  • Page 37 N-0931M Exhaust Flue Heat Exchanger Frost Sensing Switch Thermal Fuse High Limit Switch Main Flow Control Valve Anti-Frost Heater Anti-Frost Heater Heat Exchanger Thermistor Igniter Bypass Flow Control Valve Flame Rod Manifold Ignition Electrode Circuit Board Fan Motor Water Outlet Thermistor Current Leakage Transformer Safety Device (GFCI)
  • Page 38 N-0931M-DV Exhaust Flue Air Inlet Heat Exchanger Frost Sensing Switch Thermal Fuse Main Flow Control Valve High Limit Switch Anti-Frost Heater Heat Exchanger Thermistor Igniter Bypass Flow Control Valve Manifold Flame Rod Circuit Board Ignition Electrode Fan Motor Gas Valve Mechanism Water Flow Sensor Water Outlet Thermistor Current Leakage...
  • Page 39 N-0931M-OD Heat Exchanger Exhaust Flue Thermal Fuse High Limit Switch Main Flow Control Valve Anti-Frost Heater Heat Exchanger Thermistor Igniter Flame Rod Bypass Flow Control Valve Manifold Ignition Electrode Circuit Board Fan Motor Water Outlet Thermistor Current Leakage Transformer Safety Device (GFCI) Water Flow Sensor Junction Box Remote Controller...
  • Page 40 N-0841MC Exhaust Flue Frost Sensing Switch Secondary Heat Exchanger Anti-Frost Heater Frost Sensing Switch Primary Heat Exchanger Anti-Frost Heater High Limit Switch Thermal Fuse Anti-Frost Heater Main Flow Igniter Control Valve Flame Rod Neutralizer Manifold Ignition Electrode Circuit Board Bypass Flow Anti-Frost Heater Control Valve Fan Motor...
  • Page 41 N-0841MC-DV Exhaust Flue Air Inlet Secondary Heat Exchanger Frost Sensing Switch Frost Sensing Switch Anti-Frost Heater Anti-Frost Heater Primary Heat Exchanger Thermal Fuse High Limit Switch Main Flow Anti-Frost Heater Control Valve Flame Rod Igniter Neutralizer Manifold Ignition Electrode Circuit Board Bypass Flow Anti-Frost Heater Control Valve...
  • Page 42 N-1321M-ASME...
  • Page 43 Remote controller (RC-7649M and RC-7650M) Setting Buttons Display (Type RC-7649M) For setting the hot water temperature, and other settings. For turning the Flow Meter Alarm Set Button meter alarm. * Before use, remove the protective sheet from the remote controller surface. * The unit has been shipped from the factory with the remote control set at 110 °F Display (RC-7649M)

  • Page 44: Troubleshooting

    Check that the fan is rotating Fan Motor Abnormality Check for proper pump operation Recirculation Pump Error Check recirculation hot water supply pipe Call Noritz Technical Support (866-766-7489) Main Water Control Valve Bypass Water Control Valve Call Noritz Technical Support (866-766-7489) Circuit board Abnormality...
  • Page 45 Error Codes and Checkpoints (No remote controller connected.) <N-0631S (-OD) only> Reset Method Reset Method Will Unit No. of Error Code (without Remote (with Remote Work After Other Symptoms Representation Flashes Controller) Controller) Being Reset No Reset No Reset It's available to burn even before reset. Contin- uous Flashing...

  • Page 46: Remote Controller

    Remote Controller (Optional for N-0531S (-OD), N-0631S (-OD)) RC-7649M Setting Button Operation button (Switching Indication)(Changing Data No.) Display (Data No.) Displaying Maintenance Monitors <Display Procedure> 1. Press and hold both the up [ ] and down [ ] setting buttons simultaneously for more than two seconds.

  • Page 47: Maintenance Monitor List

    Maintenance Monitor List (Using Optional Remote Controller) Data Minimum Data (Display Reading x Multiplier) Value for Item Remarks Multiplier Unit Indication Total Plug-in Time X 100 hour Disp. Range [000] – [1310] 100 hours Total Combustion Time hour 1 hour Disp.

  • Page 48: Neutralizer Life Cycle Warning/Replacement Procedures

    Neutralizer life cycle warning and replacement procedures (N-0841MC series only) Neutralizer life cycle counter operation: neutralizer usage estimate When the water heater operates at full capacity, the life cycle counter will add 1 hour of neutralizer usage for approxi- mately every hour of water heater usage time. Life cycle warning steps 1.
  • Page 49 Danger This is to prevent dangerous exhaust gases from entering the building. Refer to the installation manual or contact Noritz America Technical Support (866-766-7489) for instructions. Disposal method of Neutralizing agent (calcium carbonate) remaining in the neutralizer after replacement The neutralizing agent is high purity calcium carbonate (limestone) and it does not contain chemical substances that are harmful to the environment.

  • Page 50: Gas Line Requirements

    Instructions Sample Gas Line 1. Size each outlet branch starting from the furthest Noritz Gas Water Heater using the Btuh required and the length from the Barbecue (see “Maximum Performance” table below) (50,000 Btuh) meter.
  • Page 51 Gas Line Sizing for a Noritz Gas Water Heater Adapted from UPC 1997 Maximum Natural Gas Length in Feet Pipe 10’ 20’ 30’ 40’ 50’ 60’ 70’ 80’ 90’ 100’ 125’ Size 1/2" 3/4" 1" 1 1/4" 1404 1 1/2"...

  • Page 52: Periodic Inspection

    Periodic Inspection CAUTION wait until the equipment cools before performing maintenance. Be sure to do. *= N-0631S (-OD) only For dust and soot in For laundry, newspaper, timber, Check Check the exhaust vent or oil, spray cans and other exhaust vent terminal. combustible materials.
  • Page 53 Periodic Maintenance Water Drain Valve (with Water Filter) * To avoid burns, wait until the equipment cools down before draining the water. 1. Close the water supply valve. Inlet 3. With a bucket ready, remove the inlet and outlet Packing drain plugs (about 0.2 gal.
  • Page 54 Periodic Maintenance If the unit becomes saturated with lime or scale build-up, the hot water may not run smoothly, or the unit may put out cold water. In addition, damage can occur resulting in failure of the unit if lime or scale deposits are left untreated within the unit.

  • Page 55: Changing Default Temperature Setting

    <N-0531S (-OD), N-0631S (-OD)> Changing Default Temperature Setting * The water heater has been factory set to allow a maximum temperature setting of 120°F. To access higher temperature settings through the remote controller, follow the below steps. The N-0631S can be programmed so that it will default to one of three temperatures (140, 130, 120°F) when the optional remote controller is not connected.
  • Page 56 The default temperature is 120°F when the temperature selection wire is not connected. For changing the default temperature setting on the N-1321M-ASME, please contact Noritz Technical Support (866-766-7489) for further instructions.
  • Page 57 Draining the water for maintenance or for freeze prevention (N-0841MC series only) CAUTION To avoid burns, wait until the equipment cools down before draining the water. The appliance will remain High Temperature Drain water into a bucket to prevent water damage. Drainage Using the Remote Controller (N-0841MC series only) Manual Draining Close the gas valve.

  • Page 58: Installation Check

    6. Installation Check Installation problems can cause the unit to work unsatisfactorily. If the unit is not working properly, but there are no error codes or evidence of malfunction, check the installation. * Installation Checks: Altitude 1. If this water heater is installed in a location where the altitude is greater than 2000 ft., the combustion may installations by disconnecting the "High Elevation Disconnect"...
  • Page 59 * Installation Cautions Gas Supply Piping Because a large quantity of gas is used with these appliances, make sure to size the gas meter and supply piping to match the maximum Btu rating of the heater. Air Supply and Vent Pipe Before installation, note the following: Vent pipe diameters and maximum vent length: Vent Pipe Diameter...
  • Page 60 Electrical The electrical power supply to the unit should be installed by a qualified technician. Allocate 2A on the circuit for this water heater. If more than one unit is being installed, allocate an appropriate circuit to provide power for each unit. Condensate Piping (N-0841MC series only) operation.

This manual is also suitable for:

N-0531s-odN-0631sN-0631s-odN-0751mN-0751m-dvN-0751m -od ... Show all

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