CONDENSING GAS COMBI BOILER Installation Manual Models : NRCB199DV (GHQ-C3201WX-FF US) NRCB180DV (GHQ-C2801WX-FF US) WARNING CAUTION If the information in these instructions 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.
Contents 1 Before Installation 3 2 About the Combi Boiler 5 2.1 2.2 2.3 2.4 2.5 2.6 Included Accessories............................. 5 Optional Accessories.............................. 5 Field Purchased Accessories.................. 6 Specifications......................................... 7 Dimensions............................................ 10 External View......................................... 12 3 Choosing an Installation Location 13 4 Installation Clearances 16 4.
1 Before Installation 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. DANGER Indicates an imminently hazardous situation which, if not avoided, will result in death or serious injury. WARNING Indicates a potentially hazardous situation which, if not avoided, could result in death or serious injury.
Please read if installing in Massachusetts Massachusetts requires manufacturers of Side Wall Vented products to provide the following information from the Massachusetts code: • A hard wired carbon monoxide detector with an alarm and battery back-up must be installed on the floor level where the gas equipment is to be installed AND on each additional level of the dwelling, building or structure served by the side wall horizontal vented gas fueled equipment.
2 About the Combi Boiler 2.1 Included Accessories 2.2 Optional Accessories The following accessories are included with the Combi Boiler. Check for any missing items before starting installation. The accessories listed below are not included with the Combi Boiler, but may be necessary for installation. Anchoring Screw (× 7) NOTE Additional vent pieces are available; consult the latest product catalogue for details.
Universal Concentric Vent Kit [PVC-UCVK] Low Profile Termination Kit 2 in.: [PVC-2LPT] 3 in.: [PVC-3LPT] ULC S636 / UL 1738 certified for use in both Canada and USA Plastic Rain Cap [PRC-1] Not approved for use in Canada. Neutralizer (× 1) [NC-1S] Manifold Kit (× 1) [MK-NRCB-1] Isolation Valve (1 each) (Includes pressure relief valve) Isolation valves are necessary for flushing the Plate Heat Exchanger. They allow for easy flushing and troubleshooting of the system.
2.4 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.
Performances Item Gas Consumption NG LP NG Heating LP Maximum Hot Water Capacity (45°F (25°C) Rise) Capacity Range °F Mode DHW* °C Mode Temperature Settings °F Mode Heating °C Mode DHW Performance NRCB199DV NRCB180DV (GHQ-C3201WX-FF US) (GHQ-C2801WX-FF US) Maximum Minimum Maximum Minimum 199,900 Btu/h 18,000 Btu/h 180,000 Btu/h 18,000 Btu/h 199,900 Btu/h 18,000 Btu/h 180,000 Btu/h 18,000 Btu/h 120,000 Btu/h 18,000 Btu/h 100,000 Btu/h 18,000 Btu/h 120,000 Btu/h 18,000 Btu/h 100,000 Btu/h 18,000 Btu/h 8.
Memo About the Combi Boiler 9
Outdoor Temperature Sensor 1.3” [34] 2.3” [58] 2.5 Dimensions 3.6” [92] 0.2” [5.0] WALL MOUNTING BRACKET (INCLUDED ACCESSORY) 12.8” [325] 3.5” [88] 2.3” [59] 10.2” [260] 1.2” [30] 5.1” [130] 1.3” [34] 28” [711] 26.0” [600] 0.5” [13] 1.8” [46] 16” [406] 1.1” [28] 2.6” [66] 3.9” [100] 5.5” [140] 6.7” [170] 4 x 0.24” x 0.6” [6 x 15] OBLONG HOLE 4 x Ø0.5” [Ø13] 2 x 0.24” x 0.
17.7” [450] 1.97” [50] 2.8” [71] PRESSURE RELIEF VALVE FOR HEATING (3/4”) 18.5” [471] 17.8” [451] 5.1” [130] 10.1” [256] Ø2.4” [Ø61] Ø2.4” [Ø61] FLUE COLLAR 27.
2.
3 Choosing an Installation Location DANGER Locate the vent terminal and make sure there are no obstacles around the termination for exhaust to accumulate or be obstructed. Do not enclose the termination with corrugated metal or other materials. Carbon monoxide poisoning or fire may occur as a result.
CAUTION Installation in the vicinity of gas ranges, stoves, fans, and range hoods • Avoid installation above gas ranges or stoves. • Avoid installation between the kitchen fan and stove. If oily fumes or a large amount of steam are present in the installation location, take measures to prevent the fumes and steam from entering in the appliance. NOT CORRECT • Install in a location where the exhaust gas flow will not be affected by fans or range hoods.
State of California: The Combi Boiler must be braced, anchored or strapped to avoid moving during an earthquake. Contact local utilities for code requirements in your area or call 1-866-766-7489 and request instructions. For Venting Manufacturers Requirements, see the Noritz America website (www.noritz.com).
4 Installation Clearances Cooking Equipment WARNING Before installing, check for the following: Install in accordance with relevant building and mechanical codes, as well as any local, state or national regulations, or in the absence of local and state codes, refer to National Fuel Gas Code ANSI Z223.1 / NFPA 54 - latest edition. In Canada, see the Natural Gas and Propane Installation Code CSA B149.1 - latest edition for detailed requirements.
Wall Mounting Bracket 5 Installation of the Combi Boiler 5.1 M ounting the Combi Boiler to the wall WARNING 2. Hang the Combi Boiler on the Wall Mounting Bracket. Mounting Bracket (Upper) Do not drop or apply unnecessary force to the appliance whenScrew installing. Internal parts may be Anchoring damaged and may become highly dangerous. Hang Wall Mounting CAUTION Bracket • Protect your hands with gloves and take caution to not inflict injury.
5.2 Elevation Adjustment Above 2,000 ft • Adjust the DIP switches as illustrated in the table below, if this Combi Boiler is installed at an altitude of 2,000 ft (610 m) or higher. • Disconnect the electrical power and then adjust the DIP switches. Refer to page 67 for the location of the DIP switch bank and how to change the DIP switches. Failure to perform this step will result a “73” code displayed on the Operation Display and a cease in operation.
6 Venting the Combi Boiler WARNING For PVC/CPVC/PP material CAUTION [Exhaust Vent / Air Intake] CARBON MONOXIDE POISONING Follow all vent system requirements in accordance with relevant local or state regulation, or, in the absence of local or state code, if in the U.S., refer to the National Fuel Gas Code ANSI Z223.1 / NFPA 54 - latest edition, and if in Canada, in accordance with the Natural Gas and Propane Installation Code CSA B149.1 - latest edition.
[Pipe Cement / Primer] Material PVC United States ANSI/ASTM D2564 CPVC ANSI/ASTM F493 - Centrotherm - lnnoFlue® PP Canada ULC S636 Certified Materials Only WARNING Use of cellular core PVC (ASTM F891), cellular core CPVC, or Radel® (polyphenylsulfone) in non-metallic venting system is prohibited. • Use only solid PVC / CPVC (schedule 40) or PP pipe. • 2 in. or 3 in. schedule 80 pipe may also be used on this Combi Boiler, however the Btu/h input of the Combi Boiler will be reduced by up to 9%.
For PVC/CPVC/PP material • When preparing and assembling the pipe, follow instructions as provided by the pipe manufacturer. In general, the following practices must be observed: - Squarely cut all pieces of pipe. - Remove all burrs and debris from joints and fittings. - All joints must be properly cleaned, primed, and cemented. Use only cement and primer approved for use with the pipe material as outlined on page 20.
6.2.3 Termination Considerations • Do not store hazardous or flammable substances near the vent termination and check that the termination is not blocked in any way. • Steam or condensed water may come out from the vent termination. Select the location for the termination as to prevent injury or property damage. • If snow is expected to accumulate, make sure the termination will not be covered with snow or hit by falling lumps of snow.
[DIP Switch Adjustment] ON = ● / OFF = ○ DIP switches Vent length condition #7 #8 ①Less than 33 ft using 2 in. (50 mm) pipe ○ ○ ②33 ft or more using 2 in. (50 mm) pipe ● ○ ③Less than 50 ft using 3 in. (75 mm) pipe ○ ● ④50 ft or more using 3 in. (75 mm) pipe ● ● Here [Vent length Calculation example] Step 1: Vent Diameter 2 in.
V H Slope the Vents Upward Below items are required for connecting. [Centrotherm® - Flex Through Chimney w/ Air Intake (Only 3 in.)] The vent length condition setting depends on the flexible pipe length, the rigid pipe length and number of elbows. Calculate an each ventilation system equivalent length, then adjust the DIP switch.
6.3 Select a Vent Type Direct Vent Slope the Vents Upward V H Combustion air is supplied from the outdoors. Combustion air and exhaust are seperate vent pipes. Exhaust Combustion air Slope the Vents Upward Increasers are required when using 3 in. flexible pipe. 3 in. Elbow Non-Direct Vent (with SV Conversion Kit) Combustion air is supplied from the surrounding indoor air.
6.4 Vent Pipe Installation (Direct Vent) 6.4.1 Clearance Requirements from Vent Terminations to Building Openings [When supplying combustion air from the outdoors] • All clearance requirements are in accordance with ANSI Z21.10.3 and the National Fuel Gas Code, ANSI Z223.1 and in Canada, in accordance with the Natural Gas and Propane Installation Code CSA B149.1.
6.4.2 Horizontal Vent Termination For Horizontal Vent Termination - PVC/CPVC Material Only • Use a condensation drain if necessary. • In the Commonwealth of Massachusetts a carbon monoxide detector is required for all side wall horizontally vented gas fuel equipment. Refer to the page 4 for more detail information. Ceiling Hanger Straps 3 in. (75 mm) pipe and 2 in. × 3 in. Increaser couplings required when using plastic horizontal hood terminations.
Alternate Horizontal Vent Termination- PVC, CPVC or PP Material (When 3 ft (0.9 m) distance between Intake and Exhaust cannot be ensured.) WARNING • If the distance between the air inlet and exhaust vent terminations is too short, the Combi Boiler will draw in the exhaust gases through the intake. There is a risk of inadequate combustion air for the Combi Boiler, thus increasing Carbon Monoxide (CO) emissions and noise due to vibration.
For Horizontal PVC Concentric Termination - PVC/CPVC Material Only • The concentric termination may be shortened, but not lengthened from its original factory supplied length. • 2 in. (50 mm) or 3 in. (75 mm) PVC or CPVC pipe may be used with the concentric termination. Maintain the same vent pipe diameter from the Combi Boiler flue to the termination. • Use a condensation drain if necessary.
6.4.3 Vertical Vent Termination For Vertical Vent Termination - PVC, CPVC or PP Material About the termination *• When choosing intake and exhaust terminations, you must use the same type of elbow (i.e. both 90° elbows). This will help with proper combustion by putting both terminations in the same pressure zone. • Insert Bird Screen in End of 90° Elbow. Bird Screen is not supplied with Combi Boiler, order separately.
For Vertical PVC Concentric Termination - PVC/CPVC Material Only • The concentric termination may be shortened, but not lengthened from its original factory supplied length. • 2 in. (50 mm) or 3 in. (75 mm) PVC or CPVC pipe may be used with the concentric termination. Maintain the same vent pipe diameter from the Combi Boiler flue to the termination. • Use a condensation drain if necessary.
6.5 Vent Pipe Installation (Non-Direct Vent) 6.5.1 Clearance Requirements from Vent Terminations to Building Openings [Other than Direct Vent] • All clearance requirements are in accordance with ANSI Z21.10.3 and the National Fuel Gas Code, ANSI Z223.1 and in Canada, in accordance with the Natural Gas and Propane Installation Code CSA B149.1.
6.5.2 Consideration for Installation DANGER • When installing this Combi Boiler in an area with a large amount of lint such as a commercial Laundromat, direct vent (“-DV”) system must be used. The “-SV” configuration (using SV Conversion Kit) is prohibited. • When installing this Combi Boiler in a mobile home, all combustion must be drawn directly from the outdoors. The “-SV” configuration (using SV Conversion Kit) is prohibited.
6.5.4 Horizontal Vent Termination • Use a condensation drain if necessary. • In the Commonwealth of Massachusetts a carbon monoxide detector is required for all side wall horizontally vented gas fuel equipment. Refer to the page 4 for more detail information. Exhaust 2 in. (50 mm) or 3 in. (75 mm) Either a tee or the Hood Termination may be used for the vent termination. Hanger Straps Intake 2 in. SV Conversion Kit (SV-CK-2) Inlet Screen Slope the horizontal vent 1/4 in. upwards for every 12 in.
6.5.5 Vertical Vent Termination For SV Conversion Kit About the termination *• Insert Bird Screen in End of 90° Elbow. Bird Screen is not supplied with Combi Boiler, order separately. • To prevent excessive condensation formation, only the vent termination should be located on the exterior of the building. ≥ 3 ft Min. Storm Collar Roof Flashing * • The combustion air intake of any appliance • Any other building opening 12 in.
7 Connecting the Gas Supply Follow the instructions from the gas supplier. WARNING The sizing and installation of the gas system for this Combi Boiler, as with any gas appliance, is the sole responsibility of the installer. The installer must be professionally trained to do such work and must always follow all local and national codes and regulations. Gas Type The gas type indicated on the Combi Boiler’s rating plate (NG or LP) must match the type of gas being supplied to the Combi Boiler.
Pipe Sizing • A gas shut off valve must be installed on the supply line. • Gas piping shall be in accordance with local utility company requirements and/or in the absence of local codes, use the latest edition of National Fuel Gas Code (NFPA54GC), ANSI Z223.1. In Canada, use the latest edition of CSA B149.1, Natural Gas and Propane installation code.
4. • Enter the demand is the amount of gas flowing through a section of pipe in the table below. - For natural gas, use total Btu/h rating/1000 (ft3/h). - For propane, use total Btu/h. • For each section, determine the longest piping from the point of delivery to the furthest appliance through each section. Enter this length for all pipe sections in the table below. • Round up to the lengths in the appropriate table on page 39.
[Gas pipe sizing tables] • These tables are for reference only. Consult gas pipe manufacturer for actual pipe capacities. • It is an example of Schedule 40 Metallic Pipe. • (Only Table 1 - 4) Values in Table are in ft3 of Gas per Hour. Contact your gas supplier for Btu/ft3 ratings. For simplification of your calculations, 1 ft3 of Gas is approximately equivalent to 1,000 Btu. 1. Maximum Natural Gas Delivery Capacity (For Less than 6 in. W.C. initial supply pressure) 0.5 in. W.C.
8 Connecting the DHW pipe • Installation and service must be performed by a qualified plumber. • In the Commonwealth of Massachusetts, this product must be installed by a licensed plumber or gas fitter in accordance with the Massachusetts Plumbing and Fuel Gas Code 248 CMR Sections 2.00 and 5.00. • Observe all applicable codes. • Components used in domestic piping must meet requirements in NSF/ANSI 61 Drinking Water System Components. 8.1 Installation • • 8.1.
performance. - If the water pressure is low, the Combi Boiler cannot perform to its full capability, and may become a source of trouble for the client. - If the water pressure is too high, use a Pressure Reducing Valve and a Water Hammer Arrester. • Recommend installing a pressure meter on the DHW inlet. • Mount a check valve (near the DHW inlet) when required by local code. • Mount a shut off valve (near the DHW inlet).
8.2 Water Treatment If this Combi Boiler will be installed in a location where the hardness of the supply water is high, scale Build-up may cause damage to the Plate Heat Exchanger. Perform suggested treatment and maintenance measures to be taken based on the water hardness level according to the below table.
Flushing the Plate Heat Exchanger • The Plate Heat Exchanger regularly needs to be flushed to prevent damage from Scale Build-up. Refer to the “Procedure for flushing the Plate Heat Exchanger” on page 82 or contact Noritz America at http://support.noritz.com/ or 1-866766-7489.
9 Connecting the Heating Pipe WARNING Immediately repair any leaks in the system plumbing to avoid the addition of make-up water, make-up water provides a source of oxygen and minerals that may lead to heat exchanger failure to follow these instructions will result in poor performance, unnecessary wear of system components and premature failure. 9.1 General Requirements proper sizing.
LWCO 9.3 Pressure Relief Valve LWCO needs to be installed above the top of casing. • External pressure relief valve must be installed. Observe the following. Failure to comply with the guidelines on installing the pressure relief valve and discharge piping can result in personal injury, death or substantial property damage. NOTE DO NOT install a relief valve (DHW pipe line) with pressure higher than 150 psi and relief valve (Heating pipe line) with pressure higher than 30 psi.
9.4 Auto Feeder Connection • The Combi Boiler is equipped with an auto feeder valve. Therefore, installation of additional system water fill connection is not necessary in most cases. See the following figure for an example of a water fill installation using the built-in connection.
9.5 Freeze Prevention 9.5.1 Unit Indoor Installation • This Combi Boiler has functions to protect itself from freezing by operating the pump and turning on the burner when the thermistor detects lower than 39°F (4°C). • Freezing is prevented within the device automatically unless the outside temperature without wind is below -30°F (-35°C).
10 Connecting the Condensate Drain Condensing Combi Boiler Condensate drain piping • In order to ensure proper operation of this Combi Boiler, need to install the condensate drain pipe to drain acidic condensate which produces during operation. • The pH level of the condensate is approximately 2-3. An external neutralizer must be installed on the condensate drain piping prior to disposal when required by local code or when the condensate could cause damage.
[If an external neutralizer is installed] Periodic replacement of the neutralizing agent will be required. Refer to the instructions supplied with the neutralizer for suggested replacement intervals. Floor drain After installing the condensate drain piping • Make sure that there are no obstructions blocking the condensate drain line from discharging condensate. • Be sure to check that condensate is freely flowing from the condensate drain piping.
11 Connecting Electricity Consult a qualified electrician for the electrical work. 11.1 Combi Boiler This appliance must be electrically grounded in accordance with local codes, or in the absence of local codes, with the National Electrical Code, ANSI/ NFPA 70. In Canada, the latest CSA C22.1 Electrical Code. WARNING Electrical Shock Hazard Do not connect the electrical power to the appliance until all electrical wiring has been completed.
Wiring Diagram for External Options 11.2 Quick Connect Cord NOTE The Quick Connect Multi System allows the installation of two units together utilizing only the Quick Connect Cord (QC-2). For Quick Connect Multi-System installation only use the Quick Connect Cord (QC-2), sold separately (See the optional accessory list on page 5).
6. Secure the Quick Connect Cord with a clamp. 7. Reattach the front cover (4 screws). Circuit Board Clamp 4. Press the / buttons to navigate through the “Technical Data”. * Pressing and holding the button to change it in increments of 10. 5. Check the Quick Connect Cord connection. • Select , then check appears. • If appears, check the Quick Connect Cord connection. Ground Wire Quick Connect Cord Wiring Throughway * Connecting the cord to the other unit, refer to the unit’s Installation Manual.
11.3 Outdoor Reset Control with Outdoor Temperature Sensor Outdoor Reset Control system heat load with the applicable outdoor temperature range. • The built in outdoor reset control provides simple heating curve selection based upon pre-defined Combi Boiler set temperature ranges determined by the type of heating application. This can be adjusted either by selecting the appropriate menu option, or by utilizing the fully customizable mode.lor wire) to the screw at the base of the unit.
Setting the Outdoor Reset Control Mode [I:01_HCt] Adjusting Outdoor Reset Control Options 1. Connect Outdoor Temperature Sensor to terminal. (Refer to pages 55, 56 for details.) 1. The ON/OFF button is OFF. The Operation Display must be off. 2. The ON/OFF button is OFF. The Operation Display must be off. 2. Press the 3. Press the SETTING button. Select using the / buttons, and then press the ENTER button. • The ”Installer Mode” screen appears. 4.
Customized Settings Outdoor Temperature Sensor Installation Guidelines 1. The ON/OFF button is OFF. The Operation Display must be off. • Avoid areas with direct sunlight and where temperatures may not be representative of true outdoor temperature. • Avoid placing sensor in close proximity of heat sources that may affect correct temperature sensing. (fans, exhausts, vents, lights) • Avoid installing the sensor in areas where the sensor is subjected to excessive moisture.
Outdoor Temperature Sensor Installation 1. Loosen the screw by hand using a Phillips screwdriver indicated in the figure. 5. After leading wire into the case, connect wire to the terminal by hand using a Phillips screwdriver. 2. Remove the cover by lifting it and pulling it outward. 6. You can use two knobs to relieve stress of wire. 3. Mount the outdoor sensor onto an exterior surface of the building with the supplied screws (2 pcs) by hand using a Phillips screwdriver. 7. Replace the cover.
Outdoor Reset Control [0-10 Volt Input Control] • The Outdoor Reset Control feature may be used to enhance energy efficiency while maintaining optimal heating performance. With the Outdoor Reset Control, the heating temperature setting automatically changes according to the voltage input from external controller that is decided by outdoor temperature. • Blinking on the Operation Display is not an Error Code. • is lit on the Operation Display, when the Combi Boiler receive 1.
Setting the Outdoor Reset Control [0-10 Volt Input control] - [I:01_HCt] 1. Connect Heat Demand (0-10 VDC) to terminal. (Refer to the figure on the right for details.) 2. The ON/OFF button is OFF. The Operation Display must be off. 3. Press the SETTING button. Select using the / buttons, and then press the ENTER button. • Do NOT connect room thermostat to heat demand (T-T) when an external control system is connected. * The Combi Boiler is activated only by receiving voltage.
12 Installer Mode (Parameter Settings) How to enter “Installer Mode” Parameter Settings 1. The ON/OFF button is OFF. The Operation Display must be off. [I:00_FC (Fahrenheit/Celsius)] 2. Press the SETTING button. Select using the / buttons, and then press the ENTER button. • The ”Installer Mode” screen appears. 3. When entering the “Installer Mode”, display will change to , or 1 sec. 1 sec. .
[I:02_tHS (Type of Heating System)] (page 53-56) 1 sec. This mode is for choosing Type of Heating System, when [I:01_HCt] setting is “2:or”. There are 6 typical Heating Systems that are available. For these 6 heating types the low and high temperature points are pre-programmed. (See ranges to the below) If “2:AH” is selected, additional steps are needed to be programmed, see [I:08_Air].
[I:05_HHt (Heating High Temp Range)] (page 53,57) 1 sec. settings: [Min Set-point + 30°F (17°C)] or more 180°F (82°C) (Default setting = 180°F (82°C)) [I:06_HLt (Heating Low Temp Range)] (page 53,57) 1 sec. settings: 80°F (27°C) or more [Max Set-point - 30°F (17°C)] (Default setting = 100°F (38°C)) [[I:05_HHt] and [I:06_HLt] are for changing the heating high temperature range and low temperaturerange.
[I:10_rFt (Re Fire Time)] [I:14_HPS (Heating Water Pressure Setting)] 1 sec. 1 sec. This function is to set up the interval time in Heating Mode to prevent inconsistent heating. If the selected time passes and the Combi Boiler’s inside temperature drops, this function will automatically reignite the burner in the Combi Boiler. settings: 0 - 20 min (Default setting = 0 min) [I:11_Pot (Pump Overrun Time)] This function is to control the water pressure on the heating side of the Combi Boiler.
[I:16_dHP (DHW / Space Heating Priority)] (page 64-65) 1 sec. This mode is for choosing the Combi Boiler operation “Simultaneous use of DHW &Heating” or “DHW Priority”. This Combi Boiler can operate DHW / Heating at the same time.* But if a heating system is not suitable for simultaneous use of DHW & Heating, set [I:16_ dHP] “2:dH”. To change the setting: Press and hold the or button for approximately 2 seconds.
Using DHW and Heating at the same time This Combi Boiler is designed for using DHW and Heating at the same time. Simultaneous operations are not always available and suitable. It depends on DHW and Heating setting temperatures. Contact Noritz America for more information about simultaneous use for DHW and Heating. (Phone #: 1-866766-7489) [Simultaneous Operation Flow] During DHW operation Heating Distribution Valve Opens to PHE side fully.
[To expand simultaneous range] Below charts show simultaneous operation is available or not. By default, the Combi Boiler has been set to the “①” area. When adjusting the DIP switch #2 to ON, the Combi Boiler will be set the “①+②” area. This adjustment allows the Combi Boiler to operate simultaneous more flexible. If [I:01_HCt] is set to [2:or] or [3:EC], the Combi Boiler operates simultaneously DHW and Heating automatically by increasing the heating supply temperature.
13 Setting Temperature How to Set Heating Temperature 2. Press the TEMP button twice. The following Heating Temperature Setting can be changed when the “Outdoor Reset Control” is disabled (Refer to page 53-56). (e.g.: 110°F) 1. The ON/OFF button is ON. • The current “DHW Temperature Setting” and “DHW Icon” will be blinking. • Initial factory setting is 110°F (40°C in °C mode). (e.g.: 10:15AM) 3. Set the temperature using the 2. Press the TEMP button once.
14 Service Reminder 15 Setting the DIP Switches The Combi Boiler is equipped with a Service Reminder to announce for maintenance. The factory default of this Service Reminder is “OFF”. The customer or installer needs to set the Service Reminder to ON or OFF. The location of DIP switch bank The DIP switch bank is placed on the circuit board. OFF ON How to select the Service Reminder 1 2 3 4 5 6 7 8 1. The ON/OFF button is OFF. The Operation Display must be off. 2. Press the MAINTENANCE button.
[For adjusting to accommodate longer vent runs] • When using PVC/CPVC/PP material Change DIP switch #7 and #8 by following the table below. ON = ● / OFF = ○ DIP switches Vent length condition #7 #8 ①Less than 33 ft using 2 in. (50 mm) pipe ○ ○ ②33 ft or more using 2 in. (50 mm) pipe ● ○ ③Less than 50 ft using 3 in. (75 mm) pipe ○ ● ④50 ft or more using 3 in. (75 mm) pipe ● ● Refer to page 22 for more details on ① to ④ .
2. Open the Auto Feeder Supply Line. 3. Plug in the power cord, and then press ON/OFF button on the Operation Display. The unit will be activated and then start filling to the unit with water automatically. The Operation Display will be displaying the following rotation patterns during the auto feeder process. 4.
error code 64 will continue to be displayed on the Operation Display. This warning indicator will allow the Combi Boiler to operate. To completely clear error code 64, refer to the “How to reset error code 64” section on this page. • DO NOT ignore this condition (Error Code 20 and 64). Without purging air from the Combi boiler, heating system and internal pump, the error code 20 or 64 will continuously appear and potentially damage the Heat Exchanger.
3) Clean the water filters with a brush under running water. 4) Reattach the water drain valves (with water filter). NOTE Do not to lose the O-Ring. 5) Open the hot water valve and the water supply valve. Check that water does not leak from the water drain valves.
If error codes “11”, “12”, and “90” appear, check the following contents. [“11”: Ignition failure, “12”: Flame loss] • Check that the gas supply line is appropriately sized. • Check that the gas supply pressure is within the ranges required in this manual. • Check that the gas supply matches the type indicated on the Combi Boiler’s rating plate. • Air may be left in the gas piping. Cycle the power ON/OFF. • Check that the settings of all DIP switches are appropriate.
17 Checklist After Installation After installing the Combi Boiler, review the following checklist. You should be able to answer “Yes” to all of the items in the checklist. If you answer NO to any item, installation is not complete. Review the appropriate sections to complete the installation. If you have additional questions or need assistance with installation, contact Noritz America at 1-866-766-7489.
Make sure that the cold water supply line and the hot water supply line are properly connected to the Combi Boiler. Make sure that appropriate heat insulation measures are taken according to regional climate. (e.g. wrapping with heat insulation materials, using electric heaters) Connecting the Heating Pipe (See page 44 - 47) Yes No Yes No Yes No Yes No Yes No Yes No Make sure that heating system pressure is 12 to 30 psi at the Combi Boiler outlet.
18 Plumbing Applications 18.1 General Requirements 1. This drawing is meant to show system piping concept only. Installer is responsible for all equipment and detailing required by local codes. 2. All closely spaced tees shall be within 4 pipe diameters or max 12 in. center to center spacing. 3. A minimum of 6 pipe diameters of straight pipe shall be installed upstream and downstream of all closely spaced tees. 4.
18.3 Zoned with Valves This drawing is meant to show system piping concept only. Installer is responsible for all equipment & detailing required by local codes. Refer to page 51 for electrical wiring instructions. * In case of installing external water feeder.
18.4 Zoned with Pumps This drawing is meant to show system piping concept only. Installer is responsible for all equipment & detailing required by local codes. Refer to page 51 for electrical wiring instructions. * In case of installing external water feeder. PRESSURE REDUCING VALVE PRESSURE GAUGE ZONE 1 ZONE 2 Additional Zone ZONE 3 BACKFLOW PREVENTER FLOW CHECK VALVE (TYPICAL) MAKE UP WATER ZONE PUMPS (TYPICAL) AIR SEPARATOR EXPANSION TANK Not to exceed 4 pipe Dia or Max. 12 in.
18.5 Air Handler The Combi Boiler can control the operation of an Air Handler when thermostat is used in combination with the Air Handler. The Air Handler function is designed to stop the Air Handler’s pump and fan operation when the Combi Boiler’s operation is not suitable for the Air Handler. * In order to set up the Air Handler, from Installer Mode [I:08_Air] should be activated. (Refer to page 61) Refer to page 51 for electrical wiring instructions. * In case of installing external water feeder.
18.6 Recirculation System * When the pump for the recirculation system is operating, there may be cases when the Heating Mode can not operate. It depends on the relationship between the Domestic Hot Water Temperature and the Heating Temperature.
18.7 Quick Connect Multi System Installation • The Quick Connect Multi System allows the installation of two units together utilizing only the Quick Connect Cord (QC-2). Unit’s MAX Btuh must be same in order to quick connect. e.g. When installing NRCB199DV (GHQ-C3201WX-FF US), you must install EZ111DV (GQ-C3259(60)WX-FF US) or NCC199CDV (GQ-C3259(60) WZ-FF US). • The Quick Connect Cord (QC-2) is 6 ft. (2m) long. Install the units 3-18 in.
19 Maintenance 19.1 Periodic Check • Check the following to ensure proper operation of the Combi Boiler periodically . • Also check the items of maintenance described in the Owner’s Guide. [Venting System] • The venting system must be examined periodically by a qualified service technician to check for any leaks or corrosion. • Do not obstruct the flow of combustion and ventilation air. [Burner] • Check the burner flame periodically for a proper blue color and consistency.
19.2 P rocedure for Flushing the Plate Heat Exchanger NOTE This procedure is only intended for use by a qualified service professional or authorized Service Representative. Any unauthorized use of this procedure may result in voiding the Noritz America Limited Warranty. Contact Noritz America at 1-866-766-7489 for additional support. To prevent damage to the Plate Heat Exchanger from Scale Build-up, the Plate Heat Exchanger needs to be flushed* to remove the Scale Build-up.
For Single Unit [Procedure 1. Flushing the Plate Heat Exchanger] 1. Open the front cover. 2. Connect the blue connector* marked “FLUSH” for flushing near the Circuit Board. * The connector color is blue and labeled “FLUSH”. Combi Boiler Connect Opera on Panel Circuit Board FLUSH 3. Then the code “CCC” is displayed on the Operation Display. 4. Turn on the circulating pump to circulate the flushing solution through the Combi Boiler for 1 hour at a rate of 1.5 gallons per minute or more. 5.
For Quick Connect Multi-System 1. Open the front covers. 2. Connect the blue connector marked “FLUSH” for unit needing to be flushed. (The unit is isolated from Quick Connect Multi System when the blue connector marked “FLUSH” for flushing is connected. Not need to disconnect the Quick Connect Cord.) Combi Boiler Water Heater Connect Opera on Panel FLUSH Quick Connect Cord Circuit Board Circuit Board Do not need to disconnect. 3. Then the code CCC or FCC is displayed on the Operation Display.
