CONDENSING GAS COMBI BOILER Owner’s Guide Models : NRCB199DV (GHQ-C3201WX-FF US) NRCB180DV (GHQ-C2801WX-FF US) FOR USE IN RESIDENTIAL OR MANUFACTURED HOME APPLICATIONS. WARNING If the information in this manual is not followed exactly, a fire or explosion may result causing property damage, personal injury, or death. - Do not store or use gasoline or other flammable vapors and liquids in the vicinity of this or any other appliance. - WHAT TO DO IF YOU SMELL GAS • Do not try to light any appliance.
Important Safety Information-1 To prevent damage to property and injury to the user, the icons shown below will be used to warn of varying levels of danger. Every indication is critical to the safe operation of the Combi Boiler and must be understood and observed. Potential dangers from accidents during installation and use are divided into the following four categories. Closely observe these warnings; they are critical to your safety. Icons warning of risk level This is the safety alert symbol.
(Continued) Prohibited Do not use the hot water supplied by the Combi Boiler for drinking purposes. Prohibited Do not allow anyone to change the domestic hot water temperature while hot water is being used. To prevent scalding, do not change the water temperature to a higher setting. Be sure to do. [When supplying combustion air Air supply vent from the indoors] Towel Check whether or not the air supply vent is blocked with dust, trash, a towel, or the like.
Important Safety Information-2 (Continued) combi Prohibited WARNING Do not place the exhaust vent terminal in an indoor environment by means of adding walls and ceiling (Do not enclose using corrugated sheets, etc.) Prohibited Exhaust vent terminal Carbon monoxide poisoning or fire may occur as a result. Be sure to do. Leave the proper clearance between the Combi Boiler and nearby objects (trees, timber, boxes with flammable materials etc.). Upper: Min. 12" (300mm) Left side: Min. 3" (75mm) Sug.
(Continued) Do not place outdoors Prohibited Don’t disassemble the equipment. Rain may enter the unit or the burner fire may be blown by the wind, causing malfunction or fire as a result. Outdoor Contact a qualified service technician for any necessary repairs, service or maintenance. California Proposition 65 lists chemical substances known to the state to cause cancer, birth defects, death, serious illness or other reproductive harm.
Important Safety Information-3 CAUTION Do not drink water that has been inside the unit for an extended period of time. Do not drink the first use of hot water from the unit in the morning. Do not use parts other than those specified for this equipment. Clean the filter on the water inlet as frequently as required by the quality of your local water. For installations at higher elevations, contact Noritz America for Instructions. Keep the area around the unit clean.
Contents Important Safety Information........................................................................ 2 Contents......................................................................................................... 7 General Parts Main Unit..................................................................................................... 8 Operation Panel........................................................................................ 10 Initial Operation.................................
General Parts -1 Main Unit Intake Pipe Pressure Relief Valve (Heating) Exhaust Pipe Drain Pipe Front Cover Operation Panel Water Drain Valve (with Water Filter) (Inside Domestic Water Inlet) ( p.29) Water Drain Valve Water Drain Valve (with Water Filter) (Inside Heating Return Inlet) ( Water Drain Valve (with Water Filter) (Inside Auto Feeder Inlet) ( p.30) Water Drain Valve p.
The Condensing Gas Combi Boiler discharges condensate. When heat from the exhaust gas is collected within the secondary heat exchanger, condensation occurs from moisture in the exhaust gas and the resulting water is discharged from the drain pipe (approx. 2 gallons/hour (7.5 liters/hour) maximum). It is not a water leak. Do not plug or block the drain line as it must always be allowed to freely flow. Note : The condensate discharged is acidic with a pH level of approximately 2-3.
General Parts -2 Operation Panel (RC-B201M) The Operation Panel will emit a tone when a button is pressed. ( Display Screen Next page) TEMP Button For setting and checking the Heating / Domestic Hot Water (DHW) temperature.( .14) SETTINGS Button Use to change the User Mode settings. ( .20) BACK Button Returns to the previous screen while making system settings or checking status. PREHEAT Button / Indicator(Orange) Activates the PREHEAT “ON” or “OFF” setting as determined by the user selected schedule.
FF. Display Screen * The Display Screen shown below is for illustration purposes only. The actual display will vary depending on how the Combi Boiler is being used. Temperature Setting During normal operation, the set temperature is displayed. Outdoor Reset Icon When Outdoor Reset is activated, the icon is lit. Heating Icon DHW Icon Clock Error Code A number will flash if a failure occurs. ( p.36) Burner ON Icon When burning, the icon is lit.
Initial Operation Before the first use of your Combi Boiler do the following: Follow steps 1 1 through 5. Open the water supply valve and the auto feeder shutoff valve. OPEN CLOSED 2 Open a hot water fixture to confirm that water is available, and then close the fixture again. Hot water fixture 3 4 5 12 Open the gas supply valve. Turn on the power. Do not touch with wet hands. The unit starts auto feeding for heating. The display will change to the following rotational pattern.
Clock Setting 4 1 2,3,4 Operation 1 2 3 4 Screen Display Press the button. Press the button. Description * This setting can be done regardless of whether the button is ON/OFF. After 1 sec. (CLS:CLock Setting) Press the 1) Press the button. buttons (e.g.: 10:15AM) until the correct time is displayed. 2) Press the button to save the current setting. * Each press of the button changes the time in 1-minute increments.
Setting Domestic Hot Water Temperature (DHW) 2 2 1 Operation 1 2 Press the Screen Display Description * The button ON. indicator is lit. (e.g.: 10:15AM) Press the The current "DHW Temperature Setting" and "DHW Icon" will be blinking. Set the temperature using the * To return to the home screen, press the button twice. button or let panel sit for approximately 20 seconds. (e.g.: 110°F) buttons.
W) ( When using °F mode: The temperature settings below are examples. The temperature setting °F: necessary depends on the usage, the length of piping and the time of year. ) The maximum output temperature can be set using the Operation Panel. ( p.20) 90 95 100 120 125 Washing dishes, etc. 105 110 115 Shower, hot water supply, etc. 130 135 140 High temperature *Initial factory setting is 110°F ( When using °C mode: temperature settings below are examples.
Setting Heating Temperature • Blinking ( ) on the Operation Panel is not an Error Code. • The unit has the "Outdoor Reset (Energy Saving)" feature, but this feature is disabled (Factory Default). • To enable, contact your installer or Noritz America Technical Support at 866-766-7489. ( ) is lit on the Operation Panel, the Outdoor Reset (Energy Saving) is enabled. • Heating Temperature is changing automatically based on the Outdoor Temperature. * Refer to page 22 for details.
Setting DHW Preheat Timer 3,4 2 3,4 1 This example shown is setting the "ON time" and "OFF time" to 6:00PM and 7:00PM. 1 2 Press the button ON. (e.g.: 10:15AM) * In order to use the DHW Preheat function, the clock must be set first. The DHW Preheat Timer is disabled until the clock is set. Press and hold button for the 3 * When entering DHW Preheat Timer setting mode, the clock display will be blinking. (e.g.: 12:00PM) approximately 2 seconds.
e.g. DHW Preheat is scheduled to run 7:00AM - 8:00AM, 11:30AM - 1:00PM and 6:00PM - 9:00PM.
Activate DHW Preheat 2 1 Operation 1 2 Press the Press the Description button ON. button. * When Operation Panel is OFF, you can not activate DHW Preheat. * When Preheat is activated, indicator is lit. * To deactivate DHW Preheat, Press the button. To Confirm DHW Preheat Operation When Preheat is operating, DHW Preheat Icon is lit.
Customizable Settings Muting the Operation Panel. The Operation Panel can be muted so that no tone is emitted when a button is pressed. 1 2 Press the button, Select using the buttons. Press the button. The DHW maximum output temperature can be limited to prevent discharging hot water at too high of a temperature. 1 2 Press the Select using Press the buttons, and then press the using the buttons. Press the button. The "User Mode" screen appears. 3 button.
Draining the Combi Boiler. Temperature Lock. Temperature Settings can be locked so that it does not change temperature setting if a button is pressed by mistake. Both DHW and Heating temperature setting are locked. 1 2 Press the button, Select using the buttons. Press the button. ( Refer to page 26 for details.) 1 2 The "User Mode" screen appears. Select using After 1 sec. (LoC:Temperature Lock) the 3 buttons, press the 3 Press and hold the The Operation Panel must be off.
Guide for Functions Simultaneous use for DHW and Heating This Combi Boiler can operate DHW and Heating at the same time. Simultaneous Operation DHW Priority (Operate solely) DHW ON Heating ON DHW ON Heating ON OFF OFF OFF OFF However it can not operate in every conditions. The range of simultaneous use for DHW and Heating will be decided by both the "Heating Set Temperature" and "DHW Set Temperature".
View Technical Data 3 1 2 4 Operation 1 2 Press the Screen Display Description * This setting can be done regardless of button. whether the button is ON/OFF. (td:technical data) button. Press the (Data No. 03) After 2 sec. (e.g.: 100) 3 buttons to Press the (Data No. 35) After 2 sec. navigate through the ‘Technical Data’. 4 * Press and hold the button to change it in increments of 10. ( Refer to the below table of technical data.) (e.g.
Preventing Damage from Freezing-1 CAUTION * Damage can occur from frozen water within the device and pipes even in warm environments. Be sure to read below for appropriate measures. * Repairs for damage caused by freezing are not covered by the warranty. Freezing is prevented within the device automatically by operating the pump and turning on the burner. Perform the following to prevent freezing Do not remove the power plug Freezing cannot be prevented when the power plug is disconnected.
If water will not flow because it is frozen 1. Close the gas and water valves. 2. Turn off the power 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 before using. If the Combi Boiler or the piping is frozen, do not use the Combi Boiler or it may get damaged.
Preventing Damage from Freezing-2 If the Combi Boiler will not be used for a long period of time, drain the water. Drain the water as follows: CAUTION High Temperature To avoid burns, wait until the equipment cools down before draining the water. The appliance will remain hot after it is turned off. To prevent damage from freezing, the Combi Boiler must be plugged into power at all times. If power is unplugged, drain the water completely from the Combi Boiler.
Turning the Unit Back On 1. 2. 3. 4. Check that all drain plugs are inserted. Check that all hot water fixtures/faucets are closed. Follow the procedure on p.12 “Initial operation”, steps 1 through 5. Make sure that the area around the appliance is well ventilated; open a window or a door if necessary. Then, operate the unit and verify that condensate is coming out of the drain pipe. (During normal use of the Combi Boiler, condensate will begin to discharge from the drain pipe within 15 minutes of use.
Regular Maintenance-1 Periodic Inspection CAUTION Be sure to do. To prevent burns or scalding, turn off the power button and wait until the equipment cools before performing maintenance. [When supplying combustion air from the indoors] Check For smear or blockage with dust, oil, etc. at the air supply vent. If blocked, remove the build-up with a vacuum cleaner or damp towel. * Do not permanently remove the Inlet Screen. Check For proper operation of pressure relief valve.
Periodic Maintenance Unit Wipe the outside surface with a wet cloth, then dry the surface. Use a neutral detergent to clean any stains. If an external condensate neutralizer is installed, periodic replacement of the neutralizing agent will be required. Refer to the instructions supplied with the neutralizer for suggested replacement intervals. Operation Panel Wipe the surface with a wet cloth. • Do not use benzene, oil or fatty detergents to clean the Operation Panel; deformation may occur.
Regular Maintenance-2 Periodic Maintenance Water Drain Valve (with Water Filter) Heating Water Inlet 1. 2. 3. 4. 5. The Operation Panel is OFF and disconnect the power cord to the Combi Boiler. With a bucket ready, remove the inlet and outlet drain plugs (about 0.76 gallon (2.9 L) will drain out) Remove the water drain valve (with water filter) out of the inlet. (See illustration below). Clean the water drain valve (with water filter) with a brush under running water.
Water Quality and Maintenance For people who live in a hard water area, periodical flushing is necessary. If the Heat Exchanger is not flushed, Scale Build-up may cause damage to the Heat Exchanger. When the Heat Exchanger needs to be flushed to prevent damage from Scale Build-up. Contact Noritz America for more information about flushing the Heat Exchanger. (http://support.noritz.com/ or 866-766-7489) Damage to the Combi Boiler as a result of below is not covered by the Noritz America Limited Warranty.
Troubleshooting-1 Initial Operation Unit does not attempt to ignite when water is running. • Check for reversed plumbing or crossed pipes. • Check the water drain valve filter. ( p.29, p.30) Unit attempts to ignite but fails • Reset unit and try again. There may be air in the gas line. • Have a professional check the gas supply pressure. DHW Temperature DHW is not available when a fixture is opened.
(Continued) • The unit will not heat the water if the flow rate is less than 0.4 gallons (1.5L) per minute. * Minimum activation flow rate : 0.4 GPM (1.5L/min) Minimum operating flow rate : 0.29 GPM (1.1L/min) Open the fixture more or open other fixtures so that a greater flow passes through the unit, and the unit should begin heating again. The DHW is cold when only a single fixture is open. Fluctuations in DHW temperatures. • Set water temperature at 115°F to 120°F or 48°C (118°F) to 50°C (122°F).
Troubleshooting-2 Operation Panel The power ON/OFF indicator does not light up. • Has there been a power failure? • Is the power connected properly? The clock display shows "- : - -". • If the time has not been set, The clock display shows "- : - -". ( p.13) The temperature setting cannot be changed when a button is pressed. • The temperature setting is locked. While the temperature setting is locked, the temperature setting cannot be changed. ( p.21) The clock display is blinking.
Other The Combi Boiler stops burning during operation. • Are the gas and water supply valves fully open? • Is the water supply cut off? • Is the hot water fixture/faucet sufficiently open? • Is the gas being cut off by the gas meter? (Can other gas devices such as stoves be used?) • (For LP) Is there enough gas in the tank? (Can other gas devices such as stoves be used?) • When the heating supply temperature is too high, the unit will stop burning.
Troubleshooting-3 Check for an Error Code Display on the Operation Panel åÃè·ï\é¶ÇÇ®í≤Ç◊Ç≠ÇæÇ≥Ç¢ åÃè·ï\é¶ÇÇ®í≤Ç◊Ç≠ÇæÇ≥Ç¢ If there is a problem with the unit, a numerical error code will flash on the Operation Panel. If this occurs, take appropriate measures as listed below. Flashing When an error code appears, the display and the operation light will flash together. Screen Display Error Code Cause Action Ignition error Check whether the gas valve is open.
Follow-up Service-1 Requesting Service First follow the instructions in the troubleshooting section ( p.32 to p.36). If the error is not corrected, contact Noritz America Technical Support at 866-766-7489. We will need to know: The Model ..................(check the rating plate) *See p.4 for the location of the label Date of purchase.......(see the warranty) Details of problem.....(flashing error codes, etc.
Follow-up Service-2 Gas Conversion If you move to a region that uses a different type of gas or if the local gas supply is converted, replacement of the gas manifold and adjustment of the appliance will be necessary. This work must be performed by either Noritz or a qualified service agency and will be charged for even during the warranty period. The qualified installer will also be responsible for purchasing the gas conversion kit directly from the manufacturer.
Specifications-1 • Specifications may be changed without prior notice. • The capacity may differ slightly, depending on the water pressure, water supply, piping conditions, and water temperature. Specifications Specification NRCB199DV(GHQ-C3201WX-FF US) NRCB180DV(GHQ-C2801WX-FF US) Indoor Wall Mounted Power Vented Direct Ignition 15-150 psi (Recommended 30 psi or more for maximum performance) 12-30 psi Heating Minimum Flow Rate 0.4 GPM (1.5L/min) Minimum Operating Flow Rate* 0.29 GPM (1.
Specifications-2 • Specifications may be changed without prior notice. • The capacity may differ slightly, depending on the water pressure, water supply, piping conditions, and water temperature.
