GAS 30L NG/LP GAS GAS TANKLESS WATER HEATER INSTALLATION AND OPERATION MANUAL Keep this manual with you after your unit has been installed. You may need it for further technical information. USA (855) 627-3955 www.marey.
Congratulations! You've just purchased a new Marey Gas Powered Tankless Water Heater and will soon begin to enjoy the benefits of "going tankless." The availability of instant hot water, combined with the unit's outstanding energy efficiency and space saving design, will quickly prove you that you've made the best decision for meeting your home's hot water needs.
INDEX INTRODUCTION AND SAFETY WARNINGS INTRODUCTION IMPORTANT SAFETY INSTRUCTIONS SAFETY WARNINGS 04 04 04 05 OPERATION OPERATING INSTRUCTIONS EXTENDED SHUTDOWN COLD WEATHER WARNINGS TROUBLESHOOTING DIAGNOSTIC CODES 06 07 10 12 15 17 INSTALLATION INSTALLATION GUIDELINES PACKING LIST LOCATION AND CLEARANCE REQUIREMENTS ELECTRICAL GAS PIPING AIR INTAKE AND EXHAUST (VENT) SYSTEM START UP AND TESTING 19 19 20 21 24 24 25 33 REFERENCE WIRING DIAGRAMS SYSTEM SPECIFICATION DIMENSIONS NAMES OF MAJOR PARTS AND
1. INTRODUCTION AND SAFETY WARNINGS IMPORTANT: KEEP THIS MANUAL FOR FUTURE REFERENCE! 1.1 INTRODUCTION Thank you for purchasing this Marey tankless water heater. In order to ensure proper installation, safe operation, and long life, please carefully read these instructions. Installation should only be completed by licensed professionals. The use of professionals ensures the installation is in full compliance with all required building, plumbing and electrical codes. Keep this manual for future reference.
1.3 SAFETY WARNINGS DO NOT use a fuel gas that is not listed on the nameplate as compatible with the water heater. Abnormal combustion or a deflagration may occur which can cause a serious accident. DO NOT use the unit if the vent piping has been damaged or altered in any way including cracking, separation, rusting, melting, etc. Improper venting may cause a buildup of Carbon Monoxide (CO) which can cause brain damage or death.
·A 120 V / 60 Hz power source should be used. Fire, electrical shock or damage to the water heater may occur if an incorrect power supply is used. ·This appliance is equipped with a three-prong grounded plug for increased protection against electrical shock. Ensure the plug is properly inserted into a clean, dry outlet that complies with all electrical codes. Only insert and remove the plug using the plug head and never use a wet hand to plug or unplug the power plug.
Multiple protective functions are included such as no-load heating prevention, automatic shutdown in case of accidental flameout, automatic pressure relief, etc. to make the appliance both safe and reliable 2.1 OPERATING INSTRUCTIONS FOR YOUR SAFETY READ BEFORE OPERATING WARNING : If you do not follow these instructions exactly, a fire or explosion may result causing property damage, personal injury or loss of life. A. This appliance does not have a pilot.
TO TURN OFF GAS TO APPLIANCE 1. Shut down the water heater by pressing the “ON/OFF” button. 2. Close the fuel gas valve. 3. Unplug the power cord 4. Use dry hands. Exercise caution and only unplug by grasping the plug head and pulling. Note, all factory settings will be restored next time the unit is turned on. 1. Close the water inlet valve. 2. Open all hot water faucets. 3. Obtain an appropriate container to collect the residual water from the system. 4.
CONTROL PANEL INDICATIONS LED display 1. Power on press the POWER key, the water heater is in the startup state. At this time, the temperature display displays the current set temperature, the temperature setting range is 35ºC~ 60 ºC(95F-140F), and the factory default setting temperature is 42ºC. 2. The water heater can be used in three modes, including “Auto”, Bath” and ECO”. The factory default is AUTO mode.
Mode selection button: the user can select and set the current mode through the mode selection button. With each click, the water heater exits the current mode and enters into the next working mode. POWER key: used to control the shutdown / standby / fault reset and other working states of the water heater.
The heater and water within the unit may be very hot. Allow time for the system to cool and use caution when draining to minimize risk of injury. 1.Shut down the water heater by pressing the “ON/OFF” button. 2. Close the fuel gas valve (1). 3. Unplug the power cord (3). 4. Use dry hands. Exercise caution and only unplug by grasping the plug head and pulling. Note, all factory settings will be restored next 5. Close the water inlet valve. (4) 6. Open all hot water faucets. 7.
2.3 COLD WEATHER WARNINGS FREEZING DAMAGE POTENTIAL AND PRECAUTIONS Freezing temperatures can damage the water heater and/or water piping. Freezing water expands rapidly and can create tremendous mechanical forces. Mechanical damage and pipe ruptures can result from only brief exposure to freezing temperatures. For best results, completely shut down the system by following the Extended Outage Procedure section of this manual.
MAINTENANCE AND INSPECTION ROUTINE INSPECTION The heater and exhaust piping will be hot during and shortly after use. Use caution when working in the area around the heater. To keep your water heater operating optimally please refer to the below recommended inspection and maintenance checklists. Marey recommends a periodic inspection performed by a qualified service technician. An annual inspection is normally sufficient. Frequent visual inspections by the owner are recommended.
MAINTENANCE PROCEDURES BURNER INSPECTION AND CLEANING 1. The burner must flame evenly over the entire surface of the burner head when operating correctly. 2. The flame should burn with a clear, blue, stable flame. 3. Presence of a yellow flame or of black deposits on the burner head indicates cleaning and/or burner replacement should occur. MAINTENANCE BLOWER 1. The fan motor is permanently lubricated and does not require periodic lubrication. 2.
ELECTRICAL MAINTENANCE WARNINGS Label all wires prior to disconnection when serving controls. Wiring errors can cause improper and dangerous operation. Always verify proper operation after servicing. 2.4 TROUBLESHOOTING For operating difficulties with your unit, please consult he following table for guidance. If you need further assistance, call Marey toll free service and support line at 1-855-627-3955.
Issue Possible Cause Power outage No power: Power indicator lamp is not lit Unit is unplugged No/empty fuel source There is no hot water flow when a hot water faucet is opened. Issue Hot water is not the right temperature (too hot or too cold) Hot water flow produced is lower than expected Solu�on Unit requires 120V power. Use unit when power is restored. Check circuit breaker and reset if needed. Check ground fault circuit interrupter (GFCI) if circuit includes one and reset if necessary.
The hot water coming appears white and turbid. Issue Vent system trouble “Smoke” observed coming from exhaust system during cold temperatures Water leaking from safety valve outlet Small bubbles may appear when water is heated. Air dissolved in water may evolve when water is heated. Possible Cause Vent system is restricted in some manner. Water vapor produced during combus�on is condensed in the exhaust as the hot gas is cooled by the outside air. Water system is opera�ng above design pressure.
The following table includes a list of diagnostic codes that can be displayed as well as recommended Error Code E0 E1 Possible Cause Outlet water temperature sensor failure Igni�on failure E2 Flame failure(during working) E3 Dry burning(over temperature) protec�on E4 Inlet water temperature sensor failure Fan failure Contact Marey technical support.
3. INSTALLATION 3.1 INSTALLATION GUIDELINES Only properly qualified personnel should install this equipment. Improper installation or installation by a non-qualified installer may void warranty. Failure to comply with state and local codes pertaining to water heater installations may void also warranty. Water heaters are suitable for installation as a single stand unit. These guidelines are for the installation of a single unit. This appliance shall NOT be installed outdoors.
The appliance and its individual shut off valve must be disconnected from the gas supply piping system during any pressure testing of that system at test pressures in excess of ½ psi (3.5 kPa). The appliance must be isolated from the gas supply piping system by closing its individual manual shut off valve during any pressure testing of the gas supply piping system at test pressures equal to or less than ½ psi (3.5 kPa). The gas pressure will be between these values 3.5 in W.C. (870 Pa) 10.5 in W.C.
3.3 LOCATION AND CLEARANCE REQUIREMENTS GA30LP / GA30NG CLEARANCE REQUIRED TYPICAL INSTALLATION LOCATION Choose a location for unit installation taking into account the following guidelines. • Unit must be installed indoors. Installation is not recommended in bathrooms, bedrooms or occupied rooms that are normally kept closed. • Unit should have proper clearance as indicated below including ample clearance in front of unit for proper service access.
MOUNTING The heater MUST be installed in a vertical position with fuel gas inlet at the bottom and exhaust vent positioned at the top. Installation in any other orientation will result in damage and will void warranty. 1. Identify a suitable location per the “Location and Clearance Guidelines”. Ensure that the heater will be attached in a manner that is sufficient to support the weight of the heater in operation. 2.
Figure 1.
3.4 ELECTRICAL Ensure compliance with applicable electrical codes during installation including the U.S. National Electric Code (NFPA 70) or the Canadian Electrical Code – Part 1 (CGAS C22.1) depending on location. Ensure that a properly grounded 120 V/ 60 Hz three prong outlet is available. DO NOT PLUG IN THE UNIT UNTIL INSTALLATION IS COMPLETE, TESTED, AND READY FOR INITIAL START UP. 3.
WATER PIPING 1. All piping, including soldering material, and components connected to this heater shall be approved for use in potable water systems. 2. If the heater has ever been previously used for heating non-potable water, never install the heater later into a potable water system. 3. The installation of manual shutoff valves, drain valves and unions are recommended. A professional should review each installation and ensure adequate ability to isolate, drain, and disconnect heater for service needs. 4.
INTAKE AND VENT PIPE INSTALLATION SPECIFICATIONS · This tankless water heater is a Category III Water Heate. · For best results always minimize the length of the vent system. Keep the vent pipe routing as short and straight as possible. · The water heater vent must not be combined with the vent from any other gas appliance or vent stack. · The water heater must not be connected to a chimney flue serving a separate appliance, designed to burn solid fuel.
If the heater will be installed in a building that has a system that maintains a negative pressure, it is possible for a back-draft to allow outside air to be pulled into the heater while not in operation. This can create a situation where freezing might occur within the heater. Please consult a professional for a properly designed venting solution or contact Marey.
A= B= C= D= E= F= G= H= I= J= K= L= M= Clearance Descrip�on US Installa�ons (1) Clearance above grade, veranda, porch, deck, or balcony Clearance to window or door that may be opened Clearance to permanently closed window Ver�cal clearance to ven�lated soffit located avove the terminal within a horizontal distance of 2 � (61 cm) from the center line of the teminal Clearance to unven�lated soffit Clearance to outside corner Clearance to inside corner Clearance to each side of the center line extended above m
NON-DIRECT VENTING (SINGLE PIPE) Figure 2-B Other than direct vent terminal clearances A= B= C= D= E= F= G= H= I= J= K= Clearance Descrip�on US Installa�ons (1) Clearance above grade, veranda, porch, deck, or balcony Clearance to window or door that may be opened 12 in (30 cm) Clearance to permanently closed window Ver�cal clearance to ven�lated soffit located avove the terminal within a horizontal distance of 2 � (61 cm) from the center line of the teminal Clearance to unven�lated soffit Clearance to
I= J= assembly Clearance to service regulator vent outlet Clearance to non-mechanical air supply inlet to building or the combus�on air inlet to any other appliance K= Clearance to a mechanical air supply inlet L= Clearance above paved sidewalk or paved driveway lacated on public property M= Clearance under veranda, porch, deck,or balcony * 3 � (91 cm) 4 � (1.2 m) below or to side of opening; 1 � (300 mm) above opening 3 � (91 cm) above if withdin 10 � (3 m) horizontally 7 � (2.
TERMINATION DETAILS Install the correct venting for your model according to the venting manufacturer’s instructions and the guidelines. Refer to the manufacturer’s technical literature for specific part numbers and instructions. 1. Determine the number of elbows of 90 degrees that will be used in the evacuation system (two elbows of 45 degrees being considered as a single elbow of 90 degrees) 2. Refer to the table below to determine the maximum length in function of the number of elbows.
ACCEPTABLE VENT PRODUCTS: Manufacturer Z-Flex Listed and tested vent products 2SVSRCF04 Telephone Fax 800-654-5600 888-889-3539 Contact sales@z-flex.com www.novaflex.com APPROVED VENT PRODUCTS FOR DIRECT VENT: Manufacturer Z-Flex Part number 2SVEPWC(F)(03-05) Part descrip�on 3in. 4in. twin pipe Z-Flex Z-Vent Single wall 45°Elbow Z-Flex Z-Vent Single wall 90°Elbow Z-Flex 2SVSTS 3in. 4in.
3.7 START M= IV appliances cannot be located above public walkways or other areas where UP AND TESTING condensate or vapor can cause a nuisance or hazard WARNING: the information is not Clearance under veranda, Ifporch, deck,or * in these instructions 12 in (30 cm)followed exactly, a fire or explosion may result causing property damage, balcony 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.
12. Adjust the temperature set point per “Temperature Control” Section of this manual. 13. This appliance is equipped with an ignition device that automatically lights the burner. Do not try to light the burner by hand. 14. Open a hot water tap to a flow above the minimum flow point (0.66 gpm/ 2.5 l/min). 15. The burner control system will fire the igniter, the burner will light, and hot water will be produced. 16. If the heater will not operate, follow the shut down instructions.
4. REFERENCE 4.1 WIRING DIAGRAMS Figure 1.
4.2 SYSTEM SPECIFICATION Model No Flue System GA30LP / GA30NG Gas-fired instantaneous tankless water heaters mounted in Kitchen, bathroom, etc. Forced Draught Flue Available default Temperatures Factory se�ng 107℉ Type of Appliance Opera�on Within 35℃～ 60℃（95℉～140 Temperature Range Dimensions (mm) Net Weight (kg) Connec�ons Width Height Depth Gas Cold Water Supply Hot Water Supply Igni�on System Hot Water Delivery Capacity Max. Noise level DOE.
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Nº CODE PARTS AND COMPONENTS 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 Q60.LU.2-0 G60.LE.2-6 ST10.60-0(G60-LE) ST05.102(G60-LE) ST01.143-0(G60-LE) ST14-56(Q52-LE) ST18.3-0(Q52-LE) ST03.10-0(G60-LE) ST04.31-0(Q52-LE) ST18.4-1(Q52-LE) ST15.155-0(Q52-LE) ST15.154B-0(G60-LE) G60.LU.1-0 ST08.27(G32-HG16HWA) D20.DG-5 ST06-20 Q24.12H5-5 G52.LU-1 ST05.102-12 Back panel Back panel Smoke hood Heat exchanger Burner Fan Water inlet connector ST01.143-1(G60-LE) ST17-78(G60-LE) G60.
4.5 SPARE PARTS The following spare parts are available for purchase and maybe replaced by a licensed professional. Please contact Marey. Nº CODE PARTS AND COMPONENTS 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 Q60.LU.2-0 G60.LE.2-6 ST10.60-0(G60-LE) ST05.102(G60-LE) ST01.143-0(G60-LE) ST14-56(Q52-LE) ST18.3-0(Q52-LE) ST03.10-0(G60-LE) ST04.31-0(Q52-LE) ST18.4-1(Q52-LE) ST15.155-0(Q52-LE) ST15.154B-0(G60-LE) G60.LU.1-0 ST08.27(G32-HG16HWA) D20.DG-5 ST06-20 Q24.12H5-5 G52.
4.6 LIMITED WARRANTY YOU MUST Register unit at： www.marey.com Marey Heater Corp. warrants only to the original consumer purchaser (hereinafter “Owner”) of the water heater. Warranty for this product is not transferable. The warranty is restricted to the water heater used in the United States of America and Canada. This warranty is reduced to one year if the water heater is used in a commercial, or industrial application, or if the water heater is used to supply more than one dwelling unit.
Manufacturer shall not be liable under this warranty and this warranty shall be void if ANY the following events occur: a. The water heater is not installed by a licensed plumber, licensed gas installer, or licensed contractor, or b. The water heater or any of its component parts have been subjected to misuse, misapplication, improper sizing, alteration, neglect or accident, or c.
Please feel free to contact us if you have any questions about our products, warranty service, or if you need assistance installing a unit. We also strive for continuous improvement, so we welcome your comments, feedback and suggestions. U.S.A +1 (855) 627-3955 PUERTO RICO (787) 727-0277 customerservice@marey.com www.Marey.
