Page 4
Sookook Corporation Warnings This manual is one of the key items supplied with the burner and shall be delivered to the user. The information contained in this document are intended for both the user and the installation technician and maintenance manager.
Page 5
Sookook Corporation f) After the commissioning adjustment is completed, check whether it is mechanically fixed to prevent changes in the control settings. g) Keep a copy of the instructions for use and maintenance of the burner in the boiler room.
1A. Product Introduction MAXI-type is a forced mixing-type gas burner designed to burn both LNG and LPG, enabling simple installation and repair. There is no danger of backfire because it is a NOZZLE MIX TYPE in which the pressurized air and fuel gas supplied by the blower attached to the burner burn and gets mixed simultaneously in the burner's combustion head.
This is the main dimensions of the standard product and may change slightly depending on assembly tolerances. For non-standard models, please refer to the detail assembly drawing. MAXI 5 [Figure 1D-A. MAXI 5] SW50A4 [Figure 1D-B. MAXI 8 – 16] [Figure 1D-C. MAXI 20S] [Figure 1D-D. MAXI 20 – 32]...
Install the Low-NOx burner with penetrating blast tube into combustion chamber by the half diameter of the tube for Low-NOx. [Figure 1F-D. Low-NOx Burner Installation] For MAXI-type burner, the blast tube cannot be adjusted according to the depth of combustion chamber.
Sookook Corporation 1G. Gas Valve Train Gas Piping The gas supply pipe size may vary, depending on the supply conditions. That is, if the gas supply pipe is long, the pipe size shall be large to reduce the gas pressure loss caused by the pipe. Therefore, the shorter the gas supply piping, the better. In general, the gas supply pipe shall be one size larger than the burner's gas valve train pipe.
3. The burner's ground terminal shall be securely connected to the actual ground . 4. If HIGH / LOW control is required, the H / L thermostat (AB) must be connected to terminals 6 and 7. . WIRING CIRCUIT DIAGRAM (220V, 1Ø) (GAS BURNER MAXI ON-OFF TYPE) P R (MF2 RENEW) PGSH...
Page 15
Sookook Corporation WIRING CIRCUIT DIAGRAM (220V, 1Ø) (GAS BURNER MAXI HIGH-LOW TYPE _ HIGH PRE-PURGE) P R (MF2 RENEW) PGSH PGSL Blue Yellow White Purple Black Gray Blue HI/LOW Control Limit S/W PGSH Gas Pressure High S/W Damper Motor PGSL...
Sookook Corporation PART Ⅱ : OPERATION MANUAL 2A. Preparation for Commissioning Air Purge (Gas Purge in Gas Piping) Initially, the gas piping contains air, so the air purge (gas purge) is required to fill the pipeline with gas before the ignition. The air purge is the responsibility of the city gas company or plumbing contractor, but if it is not confirmed, a user shall conduct the air purge before operating the burner.
Page 18
Sookook Corporation 2B. Check Pressure Switch [Figure 2B-A. Air/Gas Pressure Switch] Air Pressure Switch (PAS) Settings This device stops the burner when the fan is malfunctioning and the combustion air is not sufficiently in-flowed. Gas Pressure Lower Limit Switch (PGSL) Settings When the gas supply pressure is low, the required fuel is not supplied.
Page 19
Sookook Corporation Gas Governor Setting If the gas supply pressure is over 3.3kPa (330mmH2O) or in the case of severe gas pressure fluctuations, a gas governor is installed to supply the gas with a constant pressure to the burner. In this case, it is necessary to correctly adjust the gas pressure suitable for the gas usage..
Sookook Corporation 2C. Damper Motor Setting This device enables the load operation automatically when the burner is running for HIGH/LOW & Modulating model. The shaft of this motor is connected to the air damper and gas butterfly valve through linkage device for simultaneous operation.
Sookook Corporation 2D. Commissioning Adjustment Conduct the commissioning according to the followings. a) Make sure the manual shutoff valve is open. b) Check that the gas supply pressure is correct. c) If the burner does not start even after the burner operation switch is turned on, check that the burner controller is not locked out (Red light, 2E, See burner controller).
Page 22
Sookook Corporation Malfunctions after Start-up and the Causes Lockout without flame generation after “Safe Shutdown Time at Start-up” following the pre-purge - Poor air pressure (air pressure switch set pressure error or insufficient air flow) - Ignition failure (ignition transformer failure or electrode gap error) Lockout with flame generation after “Safe Shutdown Time at Start-up”...
Sookook Corporation 2E. Burner Controller MF2R Status Indicator & Reset Button [Figure 2E-A. MF2R Controller] Sequence Chart ON/OFF Sequence Chart Normal Operation Non Ignition Gas Pressure Switch Fan Motor Air Pressure Switch Ignition Transformer 1s 3s 1s 1s 3s Gas Solenoid Valve >30s Pre-Purge...
Page 24
Sookook Corporation MF2R LED INDICATOR CHANGE STATUS Description REMARKS Detect 5 seconds after Pressure Error Lockout starting the motor Extraneous “Flame detection before light during Lockout operation of gas valve and 적 적 startup ignition transformer” Flame detection failure for 3...
Page 25
Sookook Corporation 2F. Gas Flow Control Gas Solenoid Valve Install a safety shutoff valve (solenoid valve) to safely supply and shut off gas to the burner. The solenoid valve that can adjust the opening of the valve can adjust the maximum flow rate of gas at the identical gas pressure. In case of HIGH / LOW burners, the maximum flow rate can be adjusted without major adjustment of the butterfly valve.
Page 26
Sookook Corporation Initial ignition Flow Control V start (ON/OFF Control Burner) Open the manual shut-off valve to start the burner. When the burner is ignited and normal operation, adjust the load and combustion state. Check if the desired gas flow rate is achieved with the gas flow meter, and adjust the appropriate gas flow rate.
Page 27
Sookook Corporation Gas Butterfly Valve A gas butterfly valve is installed which is connected via a damper motor and a device. The gas butterfly valve regulates the amount of gas when controlling load. How to Adjust Gas Flow of HIGH / LOW Control Burner - Gas flow control at low combustion mode The low combustion mode has small ignition angle α...
When the opening degree of the air damper increases, air flow increases, and when the opening degree of the air damper decreases, air flow decreases. After adjusting the damper, tighten bolt and nut. MAXI 8, 10, 16. 20, 25 Note 1 –...
Page 29
Note 1 – Combustion Head Adjust Knob 2 – Combustion Head [Figure 2G-E. MAXI 8 - 16] [Figure 2G-F. MAXI 20S] [Figure 2G-G. MAXI 20 - 32] Combustion Head Adjustment in Standard Burners Closing the combustion head: Turn Combustion Head Adjuster clockwise.
Sookook Corporation PART Ⅲ : Maintenance 3A. Troubleshooting Guide any trouble occurs, first check the basic operation method. Check the electrical circuits. Check that the gas supply pressure is proper. Check whether all control devices are properly set up.
Sookook Corporation 3B. Regular Checkup List The burner has a rotating part and needs to be checked regularly. If a strange noise is heard when the motor starts, the bearing is faulty and shall be replaced. If foreign matter enters the air pressure switch connection hose, the pressure cannot be delivered well. Thus, it shall be checked before operation when it is used after a long time.
[Figure 2H-C. MAXI Low NOx Burner, 32(LX)] Adjust flame detection current For MAXI type, since the flame detector is installed to the location where the flame detection signal output is at its maximum, there is no need to adjust it separately.
Sookook Corporation 3D. Storage and Installation Site Condition Storage - Store the burner in a clean, dry and well-ventilated place with no vibration and temperature change. - Humidity: Keep below 75% - Ambient temperature: 10℃ ~ 40℃ (50℉ ~ 104℉) - A site with air-conditioning system, please operate it to prevent the condensation.
Page 34
The Advanced Burners & Technologies Head Office & Icheon Factory 107, Wonjeok-ro 290beon-gil , Shindun-myeon, Icheon-si, Gyeonggi-do, KOREA Gwanju Factory 40, Gobul-ro 279beon-gil, Gwangju-si, Gyeonggi-do, KOREA Homepage : www.sookook.co.kr Ver. 1.1 – 2022.01...
Need help?
Do you have a question about the MAXI and is the answer not in the manual?
Questions and answers