Page 1: Table Of Contents
G O M - 영 문 Contents 1. Safety Warnings ------------------------------- 32 2. Safe and Correct Installation -------------------- 33 3. Boiler Size and Function Guide------------------ 38 4. Electricity Line Construction--------------------- 42 5. Gas Pipe Construction-------------------------- 44 6. Heating and Hot Water Pipe Construction -------- 46 7.
Page 2: Safety Warnings
G O M - 영 문 Safety Warnings The cautions issued by this user’s manual include critical information for the safety while using the product. When the user fails to adhere to the following requirements can cause death, serious damages, and a great property loss. ‘Danger’...
Page 3: Safe And Correct Installation
G O M - 영 문 Safe and Correct Installation This instruction booklet is considered an integral part of the product and must be delivered to the user together with the appliance. It must follows the appliance also in every passage of property. Store the booklet in a safe place and read it carefully before using the appliance as it contains important information to ensure safe installation, operation and maintenance.
Page 4 G O M - 영 문 Before Installation Please check the type of gas supplied at the installation location and the electrical lines before installation. Do not use any other type of gas than the one indicated on the boiler lower right hand corner rating plate.
Page 5 G O M - 영 문 When the boiler takes air from the place where it is installed, be sure that the opening ventilation are open. Any malfunction in the ventilation may cause improper combustion that may lead to Carbon Monoxide(CO) gas poisoning, a fire, or shorten product use life.
Page 6 G O M - 영 문 Please do not install the unit in a location where there are any corrosive materials such as ammonia, chlorine, sulfur, and acids. Boiler will be damaged quicker and cause improper combustion leading to CO poisoning. Recommendations Install the unit by maintaining at least 600mm space between any electricity facility.
Page 7 G O M - 영 문 Product Installation Method Since about 35~45kg of weight will be placed, the installation wall should be reinforced if it lacks the capacity to endure such weight. Unit weight is specified in the product specification chart of this manual. When installing the unit, use the anchor bolt for firm installation to bear the unit weight.
Page 8: Boiler Size And Function Guide
G O M - 영 문 Boiler Size and Function Guide BOILER SCHEMATIC KDB-131/161/201GOM KDB-251GOM...
Page 9 G O M - 영 문 KDB-131/161/201 GOM Pressure Gauge : Indicates the pressure inside the heating pipes. In case the pressure falls below 49kPa(0.5kgf/cm ), open the water replenishing valve to automatically refill the water to 49~147kPa(0.5~1.5kgf/cm Water Drain : For a vacation or not at home for a prolonged period of time, to guard against freezing, the water is excreted through this part.
Page 10 G O M - 영 문 KDB-251 GOM Pressure Gauge : Indicates the pressure inside the heating pipes. In case the pressure falls below 49kPa(0.5kgf/cm ), open the water replenishing valve to auto- matically refill the water to 49~147kPa (0.5~1.5kgf/cm Water Drain : For a vacation or not at home for a prolonged period of time, to guard against freezing, the water is excreted through this part.
Page 11 G O M - 영 문 Standard Piping Diagram All pipes should be inspected for leaks after assembly is completed to prevent any defects or leaks. All pipes other than the gas pipes should be insulated for prevention against freezing after assembly is completed.
Page 12: Electricity Line Construction
G O M - 영 문 Electricity Line Construction 230V~50Hz Electrical connection The boiler has to be connected to the electrical installation by an “ X” type power cable without plug. The power cable must be connected to a 230V~ 50Hz main supply with correct sequence Line- Neutral- Heart.
Page 13 G O M - 영 문 Fuse substitution In the event of mains fuse replacement on the PCB, please use a 2A quick blow fuse. Please switch- off the main switch upstream the boiler. Take away the plastic box containing the main PCB.
Page 14: Gas Pipe Construction
G O M - 영 문 Gas Pipe Construction Gas pipe construction must be done by gas dealer or gas pipe installation dealer. The diameter of the gas pipes for this LP gas container should be 50kg unit is 15A(PT 1/2″ ) or 20A(PT 3/4″ ) and use two or more containers for each model.
Page 15 G O M - 영 문 After gas pipe construction, a gas leak check must be done. In case of gas leak, it may cause an explosion that induces serious bodily harm or property damage. Please complete the gas pipe construction after checking the required gas for the unit.
Page 16: Heating And Hot Water Pipe Construction
G O M - 영 문 Heating and Hot Water Pipe Construction Do not add anti freezing liquid to the heating pipes. This may shorten use life of the unit and cause malfunctions. After completely cleaning out the pipes, then complete pipe construction. Any contaminant inside the pipes may reduce the heating and hot water efficiency as well as cause malfunctions.
Page 17 G O M - 영 문 Water Supply Construction The contact diameter of the water supply pipes of this unit is 1/2″ . In the entrance of the water supply, install water supply middle valve. To use this unit it’ s always necessary to have more than 0.5 bar inlet pressure for the filling of the installation and for domestic hot water production too.
Page 18 G O M - 영 문 Available Head to the System GOM boilers are supplied with built- in circulating pump. The available head to the system are showed in the following diagrams.
Page 19 G O M - 영 문 After pipe construction is completed, you must check for leaks. Freezing Guard If unit is connected to the pipe and the pipe is not completely full of water, this may cause the pump to rotate without operating normally, overheating the pump or inducing malfunctions.
Page 20: Intake/Exhaust Flue Construction
G O M - 영 문 Intake / Exhaust Flue Construction Please use only the flue approved by our Company with the gas boiler manufactured or sold by our company. If any malfunction or accidents occur by using flue that was not approved by our company, our company will not be held responsible.
Page 21 G O M - 영 문 The connection portion of the exhaust pipe must be completely airtight. In case of leaks, exhaust gas leakage may cause carbon monoxide poisoning. The flat portion of the flue should be installed upward at about 3°angle to prevent any discharge of the condensate away from the wall.
Page 22 G O M - 영 문 Forced Exhaust Type Pipe Construction (TYPE B33) Please install supply ventilation and ventilation. Lack of ventilation may cause incomplete combustion due to oxygen shortage and if the ventilation fan malfunctions, incomplete combustion may result and exhaust gas may seep into the inside causing carbon monoxide poisoning.
Page 23 G O M - 영 문 Forced Draught Balanced Flue Construction Type C13 – C33 – C43 – C53 – C63 – C83 GOM Family boilers may be installed with many different flue type systems : B33 – C13 – C33 – C43 – C53 – C63 – C83 For the installation of the different kind of flue system, plese follow carefully the following instructions.
Page 24 G O M - 영 문 Horizontal concentric flue system 60/100mm – Type C13 The MAXIMUM LENGTH of this configuration is 2.88m. CHOICE OF THE DIAPHRAGM Between Between Flue system length Up to 0.75m 0.75m～2.00m 2.00m～2.88m φ 48mm φ 52mm Diaphragm without Horizontal concentric flue system 60/100mm –...
Page 25 G O M - 영 문 Horizontal concentric flue system 80/125mm – Type C13 The MAXIMUM LENGTH of this configuration is 2.88m CHOICE OF THE DIAPHRAGM Flue system length Up to 0.75m Between 0.75m～2.00m Between 2.00m～2.88m φ48mm φ52mm Diaphragm without Vertical concentric flue system 60/100mm –...
Page 26 G O M - 영 문 Vertical concentric flue system 80/125mm – Type C33 The MAXIMUM LENGTH of this configuration is : 6.70m CHOICE OF THE DIAPHRAGM Flue system length Up to 1.30m Between 1.30m～4.00m Between 4.00m～6.70m φ48mm φ48mm Diaphragm without...
Page 27 G O M - 영 문 Calculation of the maximum length with the concentric bends included in the flue system These flue systems may be oriented in all the possible directions: front, back, right and left hand. They may also include some special components, like the concentric bends, in order to reach some particular position.
Page 28 G O M - 영 문 Horizontal separate flue system 80/80mm – Type C13 The TOTAL MAXIMUM LENGTH (1) ＋ (2) of this configuration is 21.70m CHOICE OF THE DIAPHRAGM Between Between Between Flue system length Up to 2.80m 2.80m–10.50m 10.50m–16.10m 16.10m–21.70m φ41mm...
Page 29 G O M - 영 문 Horizontal separate flue system 80/80mm – Type C83 The TOTAL MAXIMUM LENGTH (1) ＋ (2) of this configuration is 21.70m CHOICE OF THE DIAPHRAGM Between Between Between Flue system length Up to 2.80m 2.80m–10.50m 10.50m–16.10m 16.10m–21.70m φ41mm...
Page 30 G O M - 영 문 Calculation of the maximum length with the single bends included in the flue system These flue systems may be oriented in all the possible directions: front, back, right and left hand. They may also include some special components, like the single bends, in order to reach some particular position.
Page 31 G O M - 영 문 Horizontal separate flue system 80/80mm – Type B33 The TOTAL MAXIMUM LENGTH of this configuration is 24.90m CHOICE OF THE DIAPHRAGM Between Between Between Flue system length Up to 5.00m 5.00m~12.70m 12.70m~18.30m 18.30m~23.90m φ41mm φ48mm φ52mm 131GOM–161GOM...
Page 32 G O M - 영 문 Position of the terminal for the exhausts The terminals for the exhaust have to respect certain minimum distances from the elements of the building as showed in the following prospect. DESCRIPTION Under the window Under an air opening Under a eaves Under a balcony...
Page 33 G O M - 영 문 Cautions for Installation Intake/exhaust flue must be placed on the wall that connects to the outside. There should be no dangerous materials or obstructions near intake/exhaust flue. The wall where intake/exhaust flue are placed should be incombustible interior material.
Page 34: Thermostat Installation Construction
G O M - 영 문 Thermostat Installation Construction Installation Location Install on a wall where the heating occurs such as the bedroom. The installation location should be at least 1.2~1.5m from the floor where there is plenty of ventilation. Do not install in a location where it is close to the common door, where there is cold draft, where there is direct sunlight, where a child may reach it.
Page 35: Wiring Diagram
G O M - 영 문 Wiring Diagram Wiring Connecting Diagram...
Page 36: Display Interface
G O M - 영 문 Display Interface burner is switched on.
Page 37 G O M - 영 문 Fault Codes The most important fault are detected by the PCB and showed trough the display interface. When a fault occur, the digits start to blink. The left digit shows the E letter (As Error Code). The 2 and 3 right digits show one of the following numbers :...
Page 38 G O M - 영 문 Serviceman menu (Synthesis) When the boiler is in working mode, pressing the button and the left side button contemporaneously for at least 10 seconds it’s possible to enter in the serviceman menu and to set some parameters as follows. A complete explanation of the serviceman menu procedure is written in the following chapters.
Page 39: Change Of Gas
G O M - 영 문 Change of gas Gas Type Conversion If it’s necessary to convert the boiler for different type of gas than what specified on the data plate, the specific gas kit must be requested for a quick and easy conversion.
Page 40 G O M - 영 문 * Adjust the electronic board－PCB－from the current gas to the new gas, as follows : Press the button and the left button contemporaneously for at lest 10 sec up the digits start to blink. Press the button in the left side up to the number 5 appears in the left digit.
Page 41 G O M - 영 문 Output – Gas Burner Pressure KDB 251 GOM Output Natural Gas G20 Butane G30 Propane G31 GZ350 Nozzles Nozzles Nozzles Nozzles Nozzles Nozzles Flow Flow Flow Flow Flow Flow (Kcal/h) (kW) Press. Press. Press. Press.
Page 42: Other Functions And Adjustments
G O M - 영 문 Other functions and Adjustments Adjustment of Heating Capacity The maximum heating capacity of the boiler is adjustable from the maximum to the minimum. If necessary, it’s possible to adjust it(normally adjusted in the factory to the maximum level) to the value necessary for the installation.
Page 43 G O M - 영 문 Anti Fast Cycling Function-AFCF The boiler has a function that permit to wait, after each burner switch off for heating demand, for certain period of time (from 0 to 600 seconds) in order to reduce noises for too much frequent burner switch on.
Page 44 G O M - 영 문 Primary Flow Checking When the pump runs, the flow is continuously checked. In case of absence of circulation (for example for the closure of all the radiators thermostatic valves) the pump remains in ON condition, the burner ignition is avoided and the error code E02 is shown.
Page 45: Working Mode
G O M - 영 문 Working Mode Domestic Hot Water (DHW) Production When the DHW flows, the DHW flow switch close the contact and the DHW Production mode begins. The pump switch on (if it was off), the fan is energized and, after checking the primary circuit water flow and the air flow by the air pressure switch, the burner control is enabled.
Page 46 G O M - 영 문 Anti Blocking Function After 24 hours of inactivity the pump is energized for 30 sec in order to prevent the block. After 24 hours of inactivity the 3 way valve is energized for 10 sec in order to prevent the block.
Page 47: Maintenance
G O M - 영 문 Maintenance Yearly Appliance Check and Maintenance The followings checks and maintenance activity should be performed at least one time per year : • Cleaning of the flue side of the heat exchanger • Cleaning of the burner •...
Page 48: Specifications
G O M - 영 문 Specifications Model KDB-131GOM KDB-161GOM KDB-201GOM KDB-251GOM Technical Specification 16.3 – 7.4 20.1 – 9.2 25.4 – 11.0 31.9 – 14.3 Heating Input (Max-Min) (kcal/h) (14.012 - 6.362 (17.285 - 7.910) (21.844 – 9.449) (27.429 – 12.290) 15.3 –...
Page 49 G O M - 영 문 Model KDB-251GOM Technical Specification Heating Input (Max-Min) kW (kcal/h) 26.5 – 14.3 (22.790 – 12.290) Heating output (Max-Min) kW (kcal/h) 24.3 – 12.4 (20.898 - 10.680) Useful Efficiency at Max Heating Output 91.6 Useful Efficiency at 30% Max Heating Output 89.2 Heat Loss through the Case with Burner ON Heat Loss through the Chimney with Burner ON...
Page 50 G O M - 영 문 MEMO...
Page 51 ④ What are the costs of repair and benefits? For repairs, present the warrant to the Kyungdong Boiler service personnel when he or she visits your home for repairs to receive either free or charged repair benefits.

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