Table of Contents
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NH-2001- DV
NH-1501- DV
Service Manual
• Refer to this manual whenever performing service or
maintenance on this appliance.
• This manual will be used for service technician training
seminars.
• The specifications and descriptions in this manual may
be changed without prior notice.
• For further assistance, contact Noritz Technical Support
at 1-866-766-7489.
Do not short circuit any safety
device on this appliance
Important Safety Information .................................................................................................... 2
1. Product Features ................................................................................................................ 3
2. Specifications/Performance Table ...................................................................................... 4
3. Dimensions ......................................................................................................................... 6
4. Components ....................................................................................................................... 7
5. Operating Principle ............................................................................................................. 9
6. Operation Flow Chart ......................................................................................................... 11
7. Wiring Diagram ................................................................................................................... 13
8. Troubleshooting .................................................................................................................. 15
• Error Codes and Checkpoints ......................................................................................... 15
• Checkpoints .................................................................................................................... 16
• Error Descriptions and How to Reset .............................................................................. 17
• Operation Panel (Remote Controller) ............................................................................. 20
• Maintenance Monitor List ................................................................................................ 21
• Circuit Board Replacement ............................................................................................. 22
• When Changing the Fan Motor ....................................................................................... 23
• Gas Line Requirements .................................................................................................. 24
• Gas Line Sizing Charts ................................................................................................... 25
• Manifold Gas Pressure Adjustment ................................................................................ 26
• Periodic Inspection .......................................................................................................... 27
• Changing Boiler Settings ................................................................................................ 29
• Installations at Elevations Above 2,000 ft. ..................................................................... 30
• Emergency operation procedure ..................................................................................... 30
9. Installation Check ............................................................................................................... 31
NORITZ America Corporation
GAS-FIRED DIRECT VENT BOILER
Rev: January, 2007
Contents
1
WS-06-9018
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Table of Contents
Related Manuals for Noritz NH-2001- DV
Summary of Contents for Noritz NH-2001- DV
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Page 1: Table Of Contents
• This manual will be used for service technician training seminars. • The specifications and descriptions in this manual may be changed without prior notice. • For further assistance, contact Noritz Technical Support at 1-866-766-7489. 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 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: Product Features
1. Product Features 1. An external controller is unnecessary in a basic system. An external zone controller is unnecessary for the indirect tank (PRIORITY1) and heating systems (PRIORITY 2) which do not use multiple zones. The boiler has two T-T connections and two circulator output terminals. 2. -
Page 4: Specifications/Performance Table
2. Specifications/Performance Table Item Specification Model Name NH-2001-DV NH-1501-DV Type Installation Indoor Wall Hanging Air Supply/Exhaust Direct Vent / Sealed Combustion Heating method Closed type hot-water circulation method Ignition Direct Ignition Operating Pressure 15-150 psi Safety valve setting pressure 30 psi Amount of boiler water used 4-17 GPM (bypass minimum-flow rate: 2.5GPM) Dimensions... - Page 5 Heating load - Temperature Specification Note) Maximum temperature is 188°F (87°C) Setting Temp. +13°F Setting Temp. +7°C (approximately) Proportional control Setting Temp. Setting Temp. Setting Temp. -18°F Setting Temp. -10°C (approximately) NH-1501-DV 45,500 btu/h 122,400 btu/h NH-2001-DV 45,500 btu/h 163,100 btu/h Heating load Pressure Loss Characteristics The total flow rate of the heating circuit should be no less than 4 gpm (15 L/min.) and no greater...
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Page 6: Dimensions
3. Dimensions (VIEW FROM TOP) 14.2 " 10.6 " " " WIRING THROUGHWAYS 17.7" WATER SUPPLY(1") WATER RETURN(1") " " 5 GAS INLET(3/4") " " 1.7" 18.3" " " " " 5.9" 9.1" " " " " 4 " 4 AIR INLET FLUE COLLAR "... -
Page 7: Components
4. Components Exhaust Flue Air Inlet Air Inlet Thermistor Heat Exchanger High Limit Switch Circuit Board SC Safety Relief Valve Thermal Fuse Water Return Thermistor Flame Rod Heat Exchanger Thermistor Ignition Electrode Igniter Fan Motor Manifold Transformer Circuit Board Junction Box Gas Valve Mechanism Water Supply Thermistor Water Flow Switch... - Page 8 Operation Panel (RC-7648M) PRIORITY 2 Indicator • The indicator will flash Burner On Indicator when the temperature When burning, the indicator is lit. of PRIORITY 2 (Heating use) is displayed. • The indicator is lit PRIORITY 1 Indicator during PRIORITY 2 •...
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Page 9: Operating Principle
5. Operating Principle High limit switch Safety relief Exhaust Water return thermistor valve Heat exchanger Over heat prevention thermistor device (Thermal fuse) Igniter Controller Circulator outputs, Gas proportioning Ignition plug Contact for Lamp valve Flame rod T-T connection Burner Primary gas Controller valve Air inlet thermistor... - Page 10 < How to Use, NH-2001-DV / NH-1501-DV > 1. Normal Operation (Priority1 or Priority2) 1. Turn on the power by pressing the "POWER" button on the operation panel (remote controller). (Power indicator lit.) 2. When the Operation switch of the "Indirect tank" or "Room thermostat" is turned ON (Priority1 or Priority2 calls for heat), the boiler supplies power to the Priority1 or Priority2 circulator.
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Page 11: Operation Flow Chart
6. Operation Flow Chart Priority2 operation Connect power Fix problem Disconnect power Priority2 calls for heat Power button ON Maximum output limited Use for less than Priority1 operation Error code stops flashing Power indicator (green) lit 10 years Warning indication Warning The boiler will continue indication... - Page 12 Freeze prevention control Air inlet thermistor Warning normal indication Air inlet thermistor 37° (3° ) or less Water supply thermistor 34°F (1°C) or less Water supply thermistor 41° (5° ) or less Water return thermistor 34 ° F (1 °C ) or less Water return thermistor 41°...
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Page 13: Wiring Diagram
7. Wiring Diagram WIRING DIAGRAM BR O <CN33> COLOR CODING W : White R : Red <CN89C> BK : Black V : Violet O : Orange BL : Blue <CN211> GY : Gray RESISTANCE G : Green SYSTEM <CN54> BR : Brown CONTROL CIRCUIT 2 3 4 5 6 7 8 9... - Page 14 TERMINAL A TERMINAL C BK W G Neutral Aquastat Thermostat Power Input Priority 1 Priority 2 AC120Volts (Indirect tank) (Heating) T-T Connection (DC15V 0.1Amp.) TERMINAL B Neutral Neutral Burner Power Priority 1 Priority 2 (Indirect tank) (Heating) Power supply for circulator For External Lamp AC120Volts Max.
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Page 15: Troubleshooting
8. Troubleshooting Error Codes and Checkpoints Display Description Diagnosis Point (Trouble Point) Check for abnormal combustion. Combustion abnormality Check flue for blockage or obstruction. (BTU drop) (Warning indication) Ignition failure Check the gas supply piping and pressure. Check for igniter (Initial flame fault detection) 11 12 spark (... -
Page 16: Checkpoints
Checkpoints Ref. Circuit board Check points Part Normal value Remarks CN & Pin No. Wire color CN & Pin No. Overheat Prevention 2 Ω or less CN38 BL - BL CN38 Device (Thermal Fuse) Terminal Terminal BK - W Priority1 Circulator AC 108 - 132 V 32 - 212°F Water Return... -
Page 17: Error Descriptions And How To Reset
Error Descriptions and How to Reset Flow chart CN & Error Content of Error Method of detecting Error Diagnosis point (Trouble Point) How to Fix Problem and Reset appliance Part CN & Pin No. wire color Normal value Remarks Code Pin No. - Page 18 Flow chart CN & Error Content of Error Method of detecting Error Diagnosis point (Trouble Point) How to Fix Problem and Reset appliance Part CN & Pin No. wire color Normal value Remarks Code Pin No. Air inlet thermistor abnormality Detection of open/short abnormality Measure the resistance through the air Confirm the air inlet thermistor detection temperature...
- Page 19 Flow chart Error CN & Content of Error Method of detecting Error Diagnosis point (Trouble Point) How to Fix Problem and Reset appliance Part CN & Pin No. wire color Normal value Remarks Code Pin No. Detection of combustion If abnormal combustion is detected, the error code will Combustion abnormality Check for abnormal combustion.
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Page 20: Operation Panel (Remote Controller)
Operation panel (Remote controller) Priority1 indicator (orange) Burner ON indicator (red) Priority2 indicator (green) Temperature adjustment buttons Power indicator (green) Power button Display User setting button Priority2 button Priority1 button Displaying Maintenance Monitors on the Operation Panel (Remote Controller) < Display Procedure > 1. -
Page 21: Maintenance Monitor List
Maintenance Monitor List Minimum Data Data (Display Reading x Multiplier) Value for Item Remarks Multiplier Unit Indicatiuon X 100 hour 100 hours Total Plug-in Time Disp. Range [000] - [1310] Total Combustion Time X 10 hour 10 hours Disp. Range [000] - [999] Total Combustion Time X 10000 hour... -
Page 22: Circuit Board Replacement
Circuit Board Replacement * Be sure to read. It is necessary to transfer data when replacing a circuit board. Vital information about the boiler such as the settings and unit history will have to be written to the new board. Please transfer data using the following procedure. If the transfer is not successful, the unit will not operate and a "733"... -
Page 23: When Changing The Fan Motor
When changing the fan motor. When Bell-mouth(B) is installed in the old fan motor, install Bell-mouth (B) as shown in figure to maintain the proper air volume. When you change the fan motor, please remove this part from the old fan motor, and install in the new fan motor. After changing the fan motor, please follow the procedure "Circuit Board Settings 1"or "Circuit Board Settings 2". -
Page 24: Gas Line Requirements
Gas Line Requirements All Noritz Boilers must be provided with a sufficient supply of gas in order to function properly. An under- sized gas line could result in under heated water temperatures and an error code displayed on the opera- tion panel. -
Page 25: Gas Line Sizing Charts
Gas Line Sizing Charts Adapted from UPC 1997 Maximum Natur Natural Gas Delivery Capacity in Cubic Feet per Hour (0.60 Specific Gravity, 0.5" WC Pressure Drop) Length in Feet Pipe Size 100' 125' 1/2" 3/4" 1" 1 1/4" 1404 1 1/2" 2103 1445 1161... -
Page 26: Manifold Gas Pressure Adjustment
Manifold Gas Pressure Adjustment Note 1) Use the following procedure to adjust the manifold gas pressure only if it can be done with a high flow rate through the appliance. Note 2) When the manifold gas pressure is adjusted, the front cover will be off. Adjust the manifold gas pressure to the value of "Cover Off"... -
Page 27: Periodic Inspection
Periodic Inspection CAUTION To prevent burns or scalding, turn off the power button and wait until the equipment cools before performing maintenance. Be sure to do. For laundry, newspaper, Check For dust and soot Check in the flue terminal. timber, oil, spray cans and other combustible materials. - Page 28 Do not use benzene, oil or fatty detergents to clean the operation panel; deformation may occur. When Using Anti-Freeze Replace anti-freeze once every 2 years with anti-freeze specified by Noritz. Not replacing the anti-freeze will cause rusting and freezing, resulting in damage to the device and radiator.
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Page 29: Changing Boiler Settings
Changing Boiler Settings Manual Pump Operation Procedure Use this procedure when bleeding air out of the system or when confirming proper operation of the pump(s). 1. Set the Power on/off button to the off position. 2. To circulate Priority 1, press and hold in the PRIORITY 1 switch for at least 5 seconds. To circulate Priority 2, press and hold in the PRIORITY 2 switch for at least 5 seconds. -
Page 30: Installations At Elevations Above 2,000 Ft
Installations at Elevations Above 2,000 ft. • If this boiler is being installed at an elevation of 2,000 ft. (610m) or higher, disconnect the connector labeled "High Elevation Disconnect" as illustrated on the right. This connector is located inside the unit. •... -
Page 31: Installation Check
9. Installation Check Installation problems can cause the unit to work unsatifactorily. 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 3000 ft., the combustion may become abnormal because of the thinness of the air. - Page 32 * 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...
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