Table of Contents
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Installation & Operation
Manual
Getting Service
If your boiler requires service, you have several options for getting service:
Contact an official Technical Assistance Service (TAS) or go to the website: www.kdnavien.co.kr. For
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warrany service, always contact an official Technical Assistance Service (TAS) first.
Contact the technician or professional who installed your boiler.
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Contact a licensed professional for the affected system (for example, a plumber or electrician).
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When contacting an official Technical Assistance Service (TAS), please have the following information
available:
Model number
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Serial number
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Date purchased
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Installation location and type
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Error code, if any appears on the front panel display.
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Condensing Combi Boiler
KD Navien Co., Ltd.
KOAMI Bldg., 5F, 13-6, Yeouido-Dong, Yeongdeungpo-Gu, Seoul, KOREA REP.
TEL: +82-2-3489-2200 FAX: +82-2-3489-2222 www.kdnavien.co.kr
Version: 1.00(Aug.07.2014)
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Table of Contents
Related Manuals for Navien NCB-24LSWE
Summary of Contents for Navien NCB-24LSWE
- Page 1 ● Date purchased ● Installation location and type ● Error code, if any appears on the front panel display. ● Version: 1.00(Aug.07.2014) KD Navien Co., Ltd. KOAMI Bldg., 5F, 13-6, Yeouido-Dong, Yeongdeungpo-Gu, Seoul, KOREA REP. TEL: +82-2-3489-2200 FAX: +82-2-3489-2222 www.kdnavien.co.kr...
- Page 2 Condensing Combi Boiler Installation & Operation Manual Model NCB-24LSWE NCB-28LSWE NCB-34LSWE NCB-40LSWE Keep this manual near this boiler for future reference whenever maintenance or service is required. WARNING If the information in these instructions is not followed exactly, a fire or explosion may result, causing property damage, personal injury, or death.
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Page 3: Table Of Contents
Contents Safety Information 6. Setting the DIP Switches 6.1 PCB DIP Switches 1. About the Boiler 6.2 Front Panel DIP Switches 1.1 Items Included 7. Connecting Electrical Supplies 1.2 Accessories 1.3 Technical Data 7.1 Accessing the Terminal Strips 1.4 Components 7.2 Connecting Cables 1.5 Dimensions 7.3 Connecting the Power Supply... -
Page 4: Safety Information
Safety Information The following safety symbols are used in this manual. Read and follow all safety instructions in this manual precisely to avoid DANGER unsafe operating conditions, fire, explosion, property damage, personal injury, or death. DANGER Indicates an imminently hazardous situation which, if not avoided, could result in severe injury or death. - Page 5 CAUTION WARNING Do not turn on the boiler unless the water and gas ● supplies are fully opened. Doing so may damage the boiler. Do not turn on the water if the cold water supply shut- ● off valve is closed. Doing so may damage the boiler.
- Page 6 DANGER DANGER This boiler’s water temperature is set to 49°C at the factory for your safety and comfort. Increasing the temperature increases the risk of accidental scalding. Water temperatures at or above 52°C can cause instant scalding, severe burns, or death.
- Page 7 General Installation Guidelines EC Conformity Declaration Navien ensures that this product contains no harmful substances and that no harmful materials have been used in its manufacture. Current legislation must be taken into account on installing this appliance, and it must be installed in a place with suitable Navien, hereby declares that the boiler models: ventilation.
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Page 8: About The Boiler
1. About the Boiler 1.1 Items Included When you open the box, you will find the following items with the boiler. Check the box for each of the following items before installing the boiler. If it seems like there is a problem, do not use the boiler. Contact your supplier. Keep the included items out of the reach of children, as they can be dangerous. -
Page 9: Technical Data
1.3 Technical Data The following tables list the general specifications for the boiler. Specifications Unit NCB-24LSWE NCB-28LSWE NCB-34LSWE NCB-40LSWE Heating consumption (Max/Min) 20.0/4.2 24.0/4.2 29.0/5.1 34.0/4.0 DHW heat consumption (Max/Min) 24.0/4.2 28.0/4.2 34.0/5.1 40.0/4.0 Heating output (Max/Min) at 80/60°C 19.6/3.9 23.6/3.9... - Page 10 Specifications Unit NCB-24LSWE NCB-28LSWE NCB-34LSWE NCB-40LSWE Flue exhaust/Air intake system types B23-B33-B53-C13-C33-C43-C53-C63-C83 Flue exhaust/Air intake system diameters Coaxial Ø60/100 and Ø80/125–Dual duct Ø80/80 Maximum gas pipe pressure drop Max. horizontal coaxial length Ø60/100 Max. vertical coaxial length Ø60/100 Equivalent elbow length at 90° Ø60/100 Equivalent elbow length at 45°...
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Page 11: Components
1.4 Components The following diagram shows the key components of the boiler. Component assembly diagrams and particular parts lists are included in the Appendixes. Fan & Motor Flue Duct Ignitor & Flame Rod Mounting Frame Front Panel Circulation Pump Condensate Trap NCB-24/28/34LSWE About the Boiler... - Page 12 Mixing Chamber Single Venturi Primary Heat Exchanger Air Pipe Secondary Heat Exchanger Air Vent 3-way Valve Hot Water Heat Exchanger Gas Valve Return Adapter Filter Assembly Pressure Relief Valve Space Heating Supply Space Heating Return DHW Inlet DHW Outlet NCB-24/28/34LSWE About the Boiler...
- Page 13 Fan & Motor Flue Duct Ignitor & Flame Rod Mounting Frame Front Panel Circulation Pump Condensate Trap NCB-40LSWE About the Boiler...
- Page 14 Mixing Chamber Single Venturi Primary Heat Exchanger Secondary Heat Exchanger Air Vent 3-way Valve Hot Water Heat Exchanger Gas Valve Return Adapter Filter Assembly Pressure Relief Valve Space Heating Supply Space Heating Return DHW Inlet DHW Outlet NCB-40LSWE About the Boiler...
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Page 15: Dimensions
15 mm Gas supply inlet 22 mm Cold water inlet (DHW) 15 mm Space heating return 22 mm Overhead View Supply Connections 128 mm 200 mm 75 mm 135 mm 75 mm *NCB-24LSWE/28LSWE: 350 mm NCB-34LSWE/40LSWE: 380 mm About the Boiler... -
Page 16: Operating Modes
1.6 Operating Modes 1.6.2 Operating According to Outdoor Temperature Conditions When the boiler is connected to an outdoor temperature sensor 1.6.1 Operating in Space Heating Mode (supplied optionally), functioning may be activated according to the outdoor temperature conditions, using parameter. To operate the Space heating mode, press the Space heating button on the front panel and select a heating temperature When this operating mode is activated, the boiler and/or... - Page 17 1.6.3 Operating in DHW Mode To operate DHW mode, press the DHW button on the front panel Exhaust and select a DHW temperature setpoint higher than current DHW temperature. Air In Air In 1. When a hot water tap is turned on in the home, the boiler flow meter detects DHW demand, the 3-way valve goes to DHW mode and the circulation pump starts up, which Ignitor...
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Page 18: Installation Procedure
1.7 Installation Procedure The flow diagram below provides a step-by-step description of the recommended procedure for clear, easy installation of the NCN LSWE boiler in its final location. A detailed description is given of the procedure in the sequenced sections below: Wall-mounting »... -
Page 19: Installing The Boiler
Installing the boiler in a location Carefully consider the following factors when choosing an without a drain will void the warranty and Navien will not be installation location: responsible for water damages that occur as a result. For more information about condensate drainage, refer to “3.3 Connecting... - Page 20 Adequate installation clearances Clearance from: Indoor Installation 250 mm minimum CAUTION Front 600 mm minimum Bottom 200 mm minimum Do not install the boiler on carpeting. Clean, debris and chemical-free combustion air Install the boiler in an area that allows for service and maintenance access to utility connections, piping, filters, Do not install the boiler in areas where dust and debris may and traps.
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Page 21: Mounting The Boiler To The Wall
2.2 Mounting the Boiler to the Wall WARNING Navien NCB LSWE boilers come with an upper mounting bracket that is pre-drilled at 400 mm on center for easy installation on The boiler is heavy. Always lift the unit with assistance. -
Page 22: Installing The System Piping
3.1 Installing a Space Heating System The primary and secondary heat exchangers of the Navien NCB LSWE boiler are designed to attain the highest level of heat transfer in a compact design. To accomplish this, the... -
Page 23: Installing A Domestic Hot Water (Dhw) System
3.3 Connecting the Condensate Drain (DHW) System Line The Navien NCB LSWE boiler provides domestic hot water The Navien NCB LSWE boiler creates condensation when it continuously when flow is sensed by the flow sensor. This operates. This condensation has an acidic pH of 3-5. Follow... -
Page 24: Pipe Demensions And Water Pressure
To connect the condensate drain: 1. Connect a drain line to the 13 mm fitting at the bottom of the boiler. Use only corrosion-resistant material for the drain line, such as PVC or CPVC. Do not reduce the size of this fitting or the drain line to less than 13 mm. -
Page 25: Pressure Relief Valve
3.5 Pressure Relief Valve 3.7 Testing the Water System The requirements recommended for the pressure relief valve are as follows: WARNING The pressure relief valve is calibrated to be activated at a ● maximum pressure of 3 bar, and all the pipes and connections Ensure that the boiler is full of water before firing the burner. -
Page 26: Connecting The Gas Supply
4. Connecting the Gas Supply To connect the gas supply: WARNING 1. Connect the gas supply pope to the connection located on the underside of the apliance. If a gas type other than the one specified on the boiler ● reference plate is used, it could cause fire or even 2. -
Page 27: Gas Pipe Material
4.1 Gas Pipe Material 4.3 Measuring the Inlet Gas Pressure WARNING WARNING The boiler must be left running for 10 minutes before The boiler cannot function properly without sufficient inlet checking the gas pressure, to obtain thermal equilibrium. gas pressure. Measuring the inlet gas pressure should be performed by a licensed professional only. - Page 28 3. Leave the faucet on until the boiler shuts down due to a lack 5. Loosen the screws indicated in the figure below and of gas supply, and then turn off the hot water faucet. connect a manometer to the pressure port. Reset the manometer to zero before use.
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Page 29: Venting The Boiler
5. Venting the Boiler WARNING Improper venting of the boiler can result in excessive levels of carbon monoxide, which can lead to severe personal injury or death. Venting should be performed only by a licensed professional. No specific ventilation is required in the room the boiler is installed in. -
Page 30: Selecting A Vent System
5.2 Selecting a Vent System Dual Duct System For dual duct system, fit the components as shown in the figure: WARNING 1. Remove the air intake cap. The gas removal ducts must not be in contact with or near ● Air intake cap flammable materials and they must not pass through any structures or walls of buildings made of such materials. -
Page 31: Coaxial Systems
5.3 Coaxial Systems 5.3.1 Horizontal Coaxial Removal (Type C Standard Removal System B 500 or 1,000 140 min W all Ø60/100 => Max. length: A+B-(1x45°elbow) = 20-1 = 19 m Ø80/125 => Max. length: A+B-(1x45°elbow) = 68-1 = 67 m Ø60/100 =>... -
Page 32: Dual Duct Systems
5.4 Dual Duct Systems 5.3.2 Vertical Coaxial Removal (Type C Standard Removal System 5.4.1 Horizontal Dual Duct Removal (Type C Standard Removal System Ø60/100 => Max. length: A=21 m Ø80/125 => Max. length: A=70 m Extended Removal System °elbow) Ø80/80 => Max. length: A+B+C-(1x90 = 110-2.2 = 107.8 m Minimum 350 mm Ø60/100 =>... - Page 33 5.4.2 Vertical Dual Duct Removal (Type C Extended Removal System Minimum 370 mm °elbow) Ø80/80 => Max. length: A+B+C+D+E+F-(4x90 = 110-(4x2.2) = 101.2 m Pipe Diameter Maximum Equivalent Elbow (mm) Length (m) Length (m) Ø80/80 90° °elbow) Ø80/80 => Max. length: A+B+C+D-(2x45 = 110-(2x1.4) = 107.2 m Pipe Diameter Maximum...
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Page 34: Measuring Vent Length
Carefully study the diagrams representing the different types of removal and select the one that best suits the conditions of your installation. To choose the removal accessories required for each installation, see the list of accessories on the NAVIEN price list. Maximum Total Length Pipe Diameter... -
Page 35: Setting The Dip Switches
6. Setting the DIP Switches 6.2 Front Panel DIP Switches CAUTION Dip Switch (Set of 8) Do not remove the front cover unless the power to the boiler is turned off or disconnected. Failure to do so may The DIP SW on the front panel configures the fuel selection, result in electric shock. -
Page 36: Connecting Electrical Supplies
7. Connecting Electrical Supplies 7.1 Accessing the Terminal Strips WARNING To access the PCB where the terminal strips are located, carefully follow the steps below: Improperly connecting the electrical supplies can result in electrical shock and electrocution. Follow all applicable 1. -
Page 37: Connecting Cables
7.2 Connecting Cables 4. Insert all these elements in the cable gland and press on the lid “A” until the cable is sufficiently fixed in place and the unit is sealed. DANGER Disconnect the main electrical supply before beginning any work and make sure all the necessary safety precautions are taken into account. -
Page 38: Connecting The Room Thermostat
7.4 Connecting the Room Thermostat 7.6 Connecting the Outdoor Temperature Sensor The boiler is designed to be connected to a room thermostat. The thermostat cables are to be connected to terminals 1 and The boiler is designed to be able to function with an outdoor 2 of the boiler terminal strip, removing the electrical bridge temperature sensor. -
Page 39: Installation Check List
After installing the boiler, review the following checklist. Complete the boiler start-up process by carrying out the checks listed in the table below. If you have additional questions or need assistance with installation, contact an official Technical Assistance Service (TAS), or refer to the technical support section of Navien’s website (www.kdnavien.co.kr). Check Value measured Notes Check the boiler is filled with water and check for any leaks in the heating installation. -
Page 40: Operating The Boiler
9. Operating the Boiler 9.1 Turning the Boiler On or Off 2. Press the + (Up) or – (Down) buttons until the desired temperature appears on the display. To turn the boiler on or off, press the Power button. You can adjust the temperature while the display is flashing. When the power is on, the water temperature of the space If no buttons are pressed for 5 seconds or if the ECO button heating supply will appear on the front panel display. -
Page 41: Viewing Basic Information
9.3 Viewing Basic Information 2. Press the DHW button. The DHW temperature will flash. To view information about the boiler, press the ECO button for 2 seconds. 3. Press + (Up) or – (Down) buttons until the desired temperature appears on the display. Press the + (Up) or –... -
Page 42: Setting The Operation Mode
2. Press the + (Up) or – (Down) buttons until “2.OPR” is Display Description displayed. Outdoor reset curve 3. Press the ECO Button once to access the Operation mode -: Not in use. menu. 1: Finned tube baseboard 2: FAN coil 4. - Page 43 4. Press the ECO button and enter your 4-digit password. Use This mode is used to configure the Outdoor Reset Control mode. the + or – buttons to increase or decrease numbers and the This mode is disabled by default from the factory. Summer/Winter button to move between digits.
- Page 44 Types of Heat Load Outdoor Low Temperature Setting Range Supply Set- Return Set- Range Remarks Heat Load Remarks point Range point Range -20°C – [Outdoor Max Default: - 10°C 1. Finned Temperature set point - 5°C] Tube 48.5–82°C 38–63.5°C Default Baseboard Setting the Highest Outdoor Temperature 2.
- Page 45 Setting the Min Heat Capacity for Space Heating Setting the Boost Interval Time Display Description Display Description Space heating min heat Boost interval time (min) capacity (%) This menu is used to configure the desired space heating The boost interval time may be set to prevent interruption in capacity.
- Page 46 Setting the Anti-fast Cycling Time Setting the DHW Max Heat Capacity Display Description Display Description Anti-fast cycling time (min) DHW max heat capacity (%) The anti-fast cycling time is the duration that the boiler stops This menu is used to configure the desired DHW capacity. When its space heating operation when the space heating supply or the boiler operates in the Normal mode, the max DHW capacity return temperatures reach the set values for boiler operation...
- Page 47 Setting the DHW Wait Time Setting the Burner-On Temperature Display Description Display Description DHW wait time (min) Burner-on temperature (°C) The DHW wait time is the duration that the boiler maintains the During space heating, the boiler turns on the burner when DHW supply mode after a DHW demand.
- Page 48 Setting the Supply Absolute MIN Temperature Setting the Return Absolute MIN Temperature Display Description Display Description Supply absolute Min set point Return absolute MIN set point (°C) (°C) This menu can be used to change the minimum supply This menu can be used to change the minimum return temperature range in Supply Control mode.
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Page 49: Resetting The Boiler
Setting the LCD Back Light Setting a New Password This menu may be used to set the status of LCD back light. Display Description Default: ON ● Display Description Change password LCD back light maintains minimum brightness. This menu may be used to set a new password to access the parameter setting menu. -
Page 50: Appendixes
Gas Orifice (refer to below table) ● This boiler is configured for Natural Gas at the factory. If conversion to Propane Gas is required, use the conversion kit Model supplied with the boiler. NCB-24LSWE Ø4.80 Ø3.80 WARNING NCB-28LSWE Ø6.10 Ø4.50 NCB-34LSWE Ø6.10... - Page 51 6. Loosen the four screws indicated in the figure. 8. With the internal components exposed, locate the gas inlet pipe and the gas valve in the middle of the unit, as shown in Figure 2-1 and Figure 2-2. Gas Inlet Pipe Gas Valve 7.
- Page 52 Attempting to alter or measure the gas valve outlet ● pressure could result in damage to the valve, causing potential severe personal injury, death or substantial property damage. Navien NCB LSWE boilers are shipped ready to fire natural gas ONLY. Appendixes...
- Page 53 Packing Packing Gas Orifice Gas Orifice Packing O-ring Figure 5-1. Exploded View of Gas Pipe Assembly Figure 5-1. Exploded View of Gas Pipe Assembly (NCB-24/28/34LSWE) (NCB-40LSWE) DANGER See Figure 5-1. Inspect the O-ring between the venturi and gas valve inlet adapter whenever they are disassembled. The O-ring must be in good condition and must be installed.
- Page 54 Figure 8. Insert the Analyzer Model Gas Type Switch Function Setting G20 (LNG) 1-OFF, 2-OFF 9.2% ± 0.5% 8.6% ± 0.3% NCB-24LSWE G25, G27(LNG) 1-OFF, 2-ON 10.4% ± 0.5% 10.0% ± 0.3% Fuel 1 & 2 Selection G30 (LPG) 1-ON, 2-OFF 9.2% ±...
- Page 55 Min Offset Model Gas Type Figure 9. Set Screw Location 8 ± 1 NCB-24LSWE The set screw is located behind the screw-on Note 4 ± 1 cover. This must be removed first. 8 ± 1 d.
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Page 56: Cleaning The Heat Exchanger
10.2 Cleaning the Heat Exchanger c. Fully open a hot water fixture and set the boiler to operate at 1-stage MIN mode (refer to table 2). Measure the offset value at low fire and compare it to the values in Table 3. If the offset value is out of range, the gas valve WARNING set screw will need to be adjusted. - Page 57 5. Once the front cover is removed, place it in a safe location to prevent accidental damage. Remove 2 screws 6. Loosen the four screws holding the front panel and remove here the front panel. Loosen the hex nut here NCB-40LSWE 8.
- Page 58 ● safe from water. 11. Remove the six bolts connecting the mixing chamber and Navien recommends to use a hose. ● the heat exchanger, and then remove the mixing chamber, If the water pressure of the hose is too high, water burner and the chamber brackets.
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Page 59: Wiring Diagram
10.3 Wiring Diagram Appendixes... -
Page 60: Ladder Diagram
10.4 Ladder Diagram ... -
Page 61: Outdoor Temperature Sensor (Optional)
4. Connect the wires to the terminal block. 5. Attach the cap to the body. Navien Outdoor Temperature Sensor Outdoor Temperature Sensor Installation Guidelines Avoid areas with temperature fluctuations by direct sunlight, and where the temperature may not be representative of true outdoor ●... -
Page 62: Gas Boiler System Commissioning Checklist
GAS BOILER SYSTEM COMMISSIONING CHECKLIST This Commissioning Checklist is to be completed in full by the competent person who commissioned the boiler as a means of demonstrating compliance with the appropriate Building Regulations and then handed to the customer to keep for future reference. Failure to install and commission this equipment to the manufacturer’s instructions may invalidate the warranty but does not affect statutory rights. -
Page 63: Service Record
SERVICE RECORD It is recommended that your heating system is serviced regularly and that the appropriate Service Record is completed. Service Provider Before completing the appropriate Service Record below, please ensure you have carried out the service as described in the manufacturer’s instructions.