Installation and Operation Instructions Document 1342D Installation and Operation Instructions for MASCOT ® FT Wall-Mounted, Modulating Gas, Condensing, Heating Only, Boiler Model MFTHW 80,000 BTU/hr 100,000 BTU/hr 120,000 BTU/hr 140,000 BTU/hr 199,000 BTU/hr • Natural Gas (NG) - Factory Configuration • Propane Gas (LP) - Field-Convertible FOR YOUR SAFETY: This product must be installed and serviced by a professional service technician, qualified in hot water boiler and heater installation and maintena
LAARS Heating Systems SECTION 1 Product Accessories TABLE OF CONTENTS 1.1 Introduction............................................................ 1 1.2 Included with the Appliance.................................... 1 SECTION 2 Product Characteristics 2.1 2.2 2.3 2.4 2.5 Model Nomenclature.............................................. 2 Specifications......................................................... 3 Dimensions............................................................ 6 Names of Components.
Page 1 Mascot FT, Heating Only, Boiler SECTION 1 Product Accessories 1.1 Introduction This manual provides information necessary for the installation, operation, and maintenance of the LAARS Heating Systems Mascot FT Boiler. All application and installation procedures must be read and reviewed completely before proceeding with the installation. Consult the LAARS Heating Systems factory, or your local factory representative, with any problems or questions regarding this equipment.
LAARS Heating Systems Page 2 1.2 Included with the Appliance (continued) Items Descriptions Qty 175 / 199 MBH Propane Conversion Orifice 1 80 / 100 / 120 / 140 MBH O-Ring and Gasket Kit 1 Outdoor Temperature Sensor with anchors and screws SECTION 2. Product Characteristics 2.1 Model Nomenclature The Model Nomenclature is shown on your Rating Plate and consists of a series of letters and numbers ( Nomenclature ) that further identifies the characteristics of your Mascot FT.
Page 3 Mascot FT, Heating Only, Boiler 2.2 Specifications, 80 MBH and 100 MBH Model Name Gas Input Rate MFTHW80 MFTHW100 MAX 80,000 Btu/h 100,000 Btu/h MIN 16,000 Btu/h 20,000 Btu/h Installation Indoor / Wall hung type Flue System Sealed Combustion Direct / Single Vent /Sidewall Vent Vent Run 2˝(50ft) , 3˝(100ft) Schedule 40 CPVC, PP Orifice Size Gas Supply Pressure 0.2”(5.05mm) 0.215˝ (5.45mm) LP 0.157”(4.0mm) 0.169˝ (4.3mm) NG 3.5˝ WC to 14.0˝ WC LP 3.5˝ WC to 14.
LAARS Heating Systems Page 4 2.2 Specifications, 125 MBH and 140 MBH Model Name Gas Input Rate MFTHW120 MFTHW140 MAX 120,000 Btu/h 140,000 Btu/h MIN 24,000 Btu/h 28,000 Btu/h Installation Indoor / Wall hung type Flue System Sealed Combustion Direct / Single Vent /Sidewall Vent Vent Run 2˝(50ft) , 3˝(100ft) Schedule 40 CPVC, PP Orifice Size Gas Supply Pressure 0.213˝ (5.4mm) 0.255˝ (6.5mm) LP 0.173˝ (4.4mm) 0.191˝ (4.85mm) NG 3.5˝ WC to 14.0˝ WC LP 3.5˝ WC to 14.
Page 5 Mascot FT, Heating Only, Boiler 2.2 Specifications, 199 MBH Model Name MFTHW199 Gas Input Rate MAX 199,000 Btu/h MIN 19,900 Btu/h Installation Indoor / Wall hung type Flue System Sealed Combustion Direct / Single Vent / Concentric Vent Vent Run 2˝(50ft) , 3˝(100ft) Schedule 40 CPVC, PP Orifice Size Gas Supply Pressure Manifold Pressure Power Supply NG 0.326˝ (8.3mm) LP 0.244˝ (6.2mm) NG 3.5˝ WC to 14.0˝ WC LP 3.5˝ WC to 14.0˝ WC Gas type LP NG LP NG Max fire -0.
LAARS Heating Systems Page 6 2.
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LAARS Heating Systems Page 8 2.4 Names of Components MFTHW 80/100 Heating only boiler 4 SCREWS CONTROL DISPLAY COVER (HINGES UPWARD) To remove the cover, unthread the 4 phillips head screws. Keep the screws in a safe place for re-application of cover. This is typical for all models of the Mascot FT.
Page 9 Mascot FT, Heating Only, Boiler 2.
LAARS Heating Systems Page 10 2.
Page 11 Mascot FT, Heating Only, Boiler 2.5 Product Flow Paths and Characteristics Water in the heating pipe is used for space heating.
LAARS Heating Systems Page 12 SECTION 3. Safety Regulations 3.1 Safety Symbols WARNING To avoid product damage, personal injury, or even possible death, carefully read, understand, and follow all the instructions in the Installation and Operation manual before installation, operation and service the Boiler. Laars cannot anticipate every circumstance that might involve a potential hazard. Therefore, all possible incidents are not included in our warnings.
Mascot FT, Heating Only, Boiler Page 13 damaging condition that might affect the operation of the unit. Boiler must be checked by a qualified technician before resuming operation. DANGER Vapors from flammable liquids will explode and catch on fire. These will cause death or severe burns. Do not use or store flammable products such as gasoline, solvents or adhesives in the same room or area near the appliance.
LAARS Heating Systems Page 14 3.2 Safety Precautions and Proper Use When in Operation Before Operation 1. Check the Gas Type (NG/LP) When using or moving the unit for the first time, check if gas type matches with the gas type of the Boiler. Check whether the gas type which is supplied is NG (Natural Gas) or LP (Propane) and also check the Boiler gas type. The gas type is indicated on the rating plate on side of the Boiler. 2.
Page 15 Mascot FT, Heating Only, Boiler SECTION 4. Installation WARNING 4.1 Location and Clearances The Mascot FT must be mounted to a suitable wall by a qualified heating contractor under the guidelines of a boiler. The wall may be of concrete or wood. Suitable fasteners for concrete or wood must be used. Failure to wall mount this boiler using correct fasteners will affect the performance and life expectancy of the boiler and will void the warranty.
LAARS Heating Systems Page 16 4.2 Wall Mount Bracket 3" to Top of Unit • 4.2.1 The installation height and location for your Mascot FT depends on your installation scenario. With all clearances considered, and given adequate positioning for air supply and venting, you will need to determine the best position to mount the Wall Mount Bracket.
Page 17 Mascot FT, Heating Only, Boiler 4.3 Combustion Air Mascot FT boilers must have provisions for combustion and ventilation air in accordance with the applicable requirements for Combustion Air Supply and Ventilation in the National Fuel Gas Code, ANSI Z223 1; or in Canada, the Natural Gas and Propane Installation Code, CSA B149.1. All applicable provisions of local building codes must also be adhered to.
LAARS Heating Systems Page 18 NOTICE The instructions for the installation of the venting system shall specify that the horizontal portions of the venting system shall be supported to prevent sagging; the methods of and intervals for support shall be specified.
Page 19 Mascot FT, Heating Only, Boiler 4.4 Venting (Exhaust) NOTICE DO NOT COMMON VENT MASCOT FT UNITS. Mascot FT units are never permitted to share a vent with Category I appliances. AVIS NE PAS ÉVENT COMMUNE MASCOTTE FT UNITÉS. Mascotte FT unités ne sont jamais autorisés à partager un évent Catégorie I avec les appareils. The flue temperature of the Mascot FT changes dramatically with changes in operating water temperature.
LAARS Heating Systems Page 20 with alternate manufacturers certified components and/or unlisted components. 5 . The venting must be installed according to the vent manufacturers installation instructions. The unit’s vent can terminate through the roof, or through an outside wall. Vent pipe must pitch upward, toward the vent terminal, not less than 1/4” per foot, so that condensate will run back to the Mascot FT to drain. Route vent pipe to the heater as directly as possible.
Page 21 Mascot FT, Heating Only, Boiler 4.6 Locations for Vent Pipe Terminator * For clearances not specified in ANSI Z224.1 / NFPA 54 or CAN/CSA-B 149.1, please use clearances in accordance with local installation codes and the requirement of the gas supplier. 4.6.
LAARS Heating Systems Page 22 4.6.
Page 23 Mascot FT, Heating Only, Boiler 4.6.3 Venting Requirements in the Commonwealth of Massachusetts In Massachusetts the following items are required if the side-wall exhaust vent termination is less than seven (7) feet above finished grade in the area of the venting, including but not limited to decks and porches. From Massachusetts Rules and regulations 248 CMR 5.08 1.
LAARS Heating Systems Page 24 NOTICE DO NOT COMMON VENT MASCOT FT UNITS. Mascot FT units are never permitted to share a vent with Category I appliances. AVIS NE PAS ÉVENT COMMUNE MASCOTTE FT UNITÉS. Mascotte FT unités ne sont jamais autorisés à partager un évent Catégorie I avec les appareils. Common Vent Test NOTE: This section does not describe a method for common venting Mascot FT units. It describes what must be done when an existing unit is removed from a common vent system.
Page 25 Mascot FT, Heating Only, Boiler 4.7 Air Supply and Vent Connections at the Appliance 4.7.1 Vent / Air Pipe Lengths Boiler model MFTHW (all sizes) Table 6. 3˝ Combustion Air / Vent Pipe 2˝ Combustion Air / Vent Pipe Max Elbow Max Max 100´ (30M) 6 50´ (15M ) * Maximum Vent / Air Pipe Lengths for either 3” or 2 “ Pipes Elbow Max * 4 *Propane models are limited to 25 equivalent feet of 2” vent NOTE: F or additional elbows, reduce maximum allowable length • 5 feet (1.
LAARS Heating Systems Page 26 4.7.3 Indoor Combustion Air Read and Follow Sections 4.3 Guidelines First. 1. Insert the termination end cap into the intake air duct. 2. P rovide two openings to allow for circulation of combustion air as specified by ANSI Z224.1/NFPA 54. In Canada refer to CAN/CSA B-149.1 NOTE: The Mascot FT needs fresh air for safe operation and must be installed so there are provisions for adequate combustion and ventilation air.
Page 27 Mascot FT, Heating Only, Boiler 4.8 Vent / Air Pipe Termination Note : For using more than 1 elbow in your vent pipe, reduce maximum allowable length •5 feet (1.5M) for each additional 3-inch 90-degree elbow • 2.5 feet (0.75M) for each additional 3-inch 45-degree elbow • 8 feet (2.4M) for each additional 2-inch 90-degree elbow • 4 feet (1.2M) for each additional 2-inch 45-degree elbow • The thickness of the wall vents installed : Min 4˝ ~ Max 20˝ Vent Termination 1.
LAARS Heating Systems Page 28 4.8 Vent Pipe Termination (continued) Figure 5. VENT Vertical Vent Termination • Direct Vent - Vertical Terminations with Sloped Roof AIR INLET • Direct Vent - Optional Side wall Terminations • Direct Vent - Optional Side wall Terminations Figure 6. Direct Vent • Optional Side Wall Terminations Side wall kit (2˝ or 3˝ ) Side wall kit (2˝ or 3˝ ) 4.
Page 29 Mascot FT, Heating Only, Boiler 4.9 Gas Supply and Piping Gas piping should be supported by suitable hangers or floor stands, not the appliance. Review the following instructions before proceeding with the installation. 1. Verify that the appliance is fitted for the proper type of gas by checking the rating plate. Mascot FT will function properly at elevations up to 10,000 feet (3050 m). Refer to Section 4.12 for High Altitude Settings. 2. The maximum inlet gas pressure must not exceed 13" W.C.
LAARS Heating Systems Page 30 4.9 Gas Supply and Piping (continued) Natural Gas Pipe Sizing (Maximum) Maximum capacity of pipe in cubic feet of gas per hour for gas pressures of 0.5psi or less and a pressure drop of 0.5 Inch water column. (Based of a 0.60 Specific gravity gas) For reference only. Referenced from gas pipe manufacturer specifications for actual delivery capacity. The DOE standard for Natural Gas is 1100 BTU/ft 3. Contact the local gas supplier for actual BTU/ft 3 rating.
Page 31 Mascot FT, Heating Only, Boiler Propane Gas Pipe Sizing (Maximum) Intended use : Pipe Sizing Between Single-or Second-Stage (Low Pressure) Regulator and Appliance. For reference only. Referenced from gas pipe manufacturer specifications for actual delivery capacity. The DOE standard for Natural Gas is 1100 BTU/ft3. Contact the local gas supplier for actual BTU/ft3 rating. Inlet Pressure : 11 in. w.c / Pressure Drop : 0.5in. w.c / Specific Gravity : 1.
LAARS Heating Systems Page 32 4.9 Gas Supply and Piping (continued) he gas connection fitting on the unit is 3/4˝ T female NPT. The supply line must be sized for the maximum output of the boiler model being installed. If there are additional gas appliances from the main supply line, you must measure sizes of the supply line according to the COMBINED total maximum BTUH draw for the appliances as if they were all operating at the same time.
Page 33 Mascot FT, Heating Only, Boiler Suggested Natural Gas (NG) Layout Other Applianc e Sediment Trap Suggested Propane Gas (LP) Layout Sediment Trap Other Applianc e Gas Regulator (Supply Press 12˝ ) LP GAS TANK Boiler must be installed downstream of the gas meter for adequate gas supply. Boiler gas connection pipe not less than a 1/2”.
LAARS Heating Systems Page 34 4.10 Gas Supply Pressure The minimum and maximum inlet gas line pressures must be Natural Gas LP Gas Maximum Pressure 10.5˝ WC Maximum Pressure 13.0” WC Minimum Pressure 3.5˝ WC Minimum Pressure 8.
E NCE LON Y. D OON OFF OFFN G ON EOFF R N E T F O Mascot FT, Heating Only, Boiler O A N RE H OFF OFF OFF ON C ON ON ON OFF ON OFF ON 4.11 Gas MBH 80 Setup 100 and 120 Adjustment 140 N/A Table B DIP Switch Settings ON Page 35 199 Figure C For the Step by step process to measure CO2 values on the Mascot FT, please refer to Steps 12 thru Step 22 in Section 4.13 of this Installation Manual. 9. Per Table B, set DIP Switch 5 to OFF for LP Propane. 10. Turn ON the GAS and WATER supply to the Mascot FT.
LAARS Heating Systems Page 36 4.12 High Altitude Installations and Orifices The Mascot FT is shipped with a Natural Gas Nozzle or Orifice that is designed for altitudes up to 3,000 ft. Yet the Mascot FT may be installed (without modification) at elevations up to 10,000 ft, as the unit will de-rate at high altitudes. Mascot FT’s that have been converted to propane will also de-rate at high altitudes up to 10,000 ft.
Page 37 Mascot FT, Heating Only, Boiler Document 4296B Mascot FT, Heating Only, Gas Conversion Kit 4.13 Natural Gas to Propane Conversion Laars Kit Document #4296 Kit # R20773 The Laars Mascot FT, Heating Only, condensing gas boiler is configured for Natural Gas (NG) from the factory.
LAARS Heating Systems Page 38 M ascot FT, Heating Only, Gas Conversion Kit 4.13 Natural Gas to Propane Conversion (continued) 3. Document 4296B Using a Phillips screwdriver, remove the 4 screws on the front cover. See Figure A. GAS VALVE COMBUSTION TEST PORT GAS VALVE COMBUSTION TEST PORT BLOWER BLOWER GAS INLET PIPE GAS INLET PIPE COVER COVER Figure A ( MFTHW 80/100120/140 ) 4.
Page 39 Mascot FT, Heating Only, Boiler M ascot FT, Heating Only, Conversion Gas Conversion Kit 4.13 Natural Gas to Propane (continued) ON OFF MIN Fire Normal Operation MAX Fire Normal Operation NG Natural LP Propane 3” Vent Size 2” Vent Size Document 4296B ON OFF ON ON E OFF C E . N O Y E G R OFFONLON D ON TOFF OFFN ON E F NO RE HA OFF OFF OFF ON C ON ON ON MBH 80 100 120 140 Table B DIP Switch Settings N/A 199 Figure C 9. Per Table B, set DIP Switch 5 to OFF for LP Propane. 10.
LAARS Heating Systems Page 40 M ascot FT, Heating Only, Gas Conversion Kit 4.13 Natural Gas to Propane Conversion (continued) CO2 value Document 4296B Propane Gas (LP) 2˝ VENT MFTHW 80/100 All sizes 120/140/175/199 Natural Gas (NG) 3˝ VENT 2˝ VENT 3˝ VENT 9.5~11% 8.5~10.5% 9~10.5 % 8~10% Table D 14. 15. 16. 17. 18. 19. 20. 21. 22. Refer to the below table.
Page 41 Mascot FT, Heating Only, Boiler 4.14 Plumbing Guidelines External Plumbing and Water Connection Guidelines - Ensure pipe material meets local codes and industry standards. - The pipe end must be clean and free of debris. - Do not apply torch heat within 12˝ of the bottom connections of the unit. - The size of the DHW pipe should be 3/4˝ diameter and central heating water pipe should be 1˝ diameter. - Isolation valves(Shutoff valve) will be used. - All piping should be insulated.
LAARS Heating Systems Page 42 4.14 Plumbing Guidelines Diaphragm type Expansion tank - The air in a diaphragm-type expansion tank is separated from the water by a flexible rubber membrane. When the tank is installed in and connected to the piping of the system, water enters the other side of the tank chamber and presses down on the diaphragm. - You should always install an ‘Automatic Air Vent on the top of the air separator to remove residual air from the system.
Page 43 Mascot FT, Heating Only, Boiler 4.14 Plumbing Guidelines Zoning with circulation pump - Each heating zone of a pump based system has its own circulator pump which runs when the zone needs it. - Each zone thermostat goes to a controller which controls the pumps.
LAARS Heating Systems Page 44 4.14 Plumbing Guidelines Zoning with zone valve - In a valve based system, there is one circulator pump at the boiler and each heating zone has a zone valve which opens when the zone. - Each thermostat is wired directly to the corresponding zone valve. Contacts in the zone valves provide a proper signal to the boiler when the valve is opened.
Page 45 Mascot FT, Heating Only, Boiler 4.14 Plumbing Guidelines Indirect Water Heating - Installer is responsible for all equipment and detailing required by local codes. - The minimum pipe size of CH piping should be 1˝ in diameter. valve DHW Tank Valve Pump n Valve re relief valve CH SUPPLY CH RETURN DHW Pump Indirect DHW Tank 2-way valve Indirect DHW Tank Mixing Valve DHW Pump Isolation Valve Pressure relief valve Figure 12.
Page 46 LAARS Heating Systems 4.15 Pressure Relief Valve External pressure relief valves 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. WARNING Do not operate this appliance before the pressure relief valve supplied is installed with sufficient relieving capacity in accordance with the ASME Rating Plate on the boiler.
Page 47 Mascot FT, Heating Only, Boiler 4.16 Disposal of Condensate High efficiency gas condensing Boilers create condensation when operating. Condensation has acidic (pH) of approximately 4-5. Condensate must be drained in accordance with all local regulations. Follow your local code with regards to the disposal of condensation. One of 4 disposal methods must be followed 1. to floor drain 2. to neutralizer (optional kit) 3. to laundry tub 4.
LAARS Heating Systems Page 48 4.17 Electrical Wiring Connections WARNING Install wiring and electrically ground boiler in accordance with authority having jurisdiction or, in the absence of such requirements, follow the National Electrical Code, NFPA 70, and/or CSA C22.1 Electrical Code-Part 1 in Canada. ELECTRICAL SHOCK HAZARD — For your safety, turn off electrical power supply at service entrance panel before making any electrical connections to avoid possible electric shock hazard.
Page 49 Mascot FT, Heating Only, Boiler 4.18 DIP Switches DIP switches 6 and 7 have to be set in the OFF position when the boiler is running normally. DIP switches 1, 2, and 3 are system switches and are factory Document 4296B M ascot FT, Heating Only, Gas Conversion Kit set to the boiler model and size and should not be touched. ON OFF MIN Fire Normal Operation MAX Fire Normal Operation NG Natural LP Propane 3” Vent Size 2” Vent Size ON OFF ON OFF ON ON CE Y.
LAARS Heating Systems Page 50 4.
Mascot FT, Heating Only, Boiler 4.
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Page 53 Mascot FT, Heating Only, Boiler 4.21 Electrical Connections Connector #, Location, Type PIN 1 8 2 9 3 10 CN7 LWD1140-14 4 11 5 12 6 13 7 14 F.S 2 SELV (5V) OP.S Operating water temperature sensor SELV (5V) DH.S Exhaust temperature sensor SELV (5V) CH Return temperature sensor SELV (5V) BG.S DHW temperature sensor or Mechanical aquastat connection SELV (5V) ST.S System temperature sensor SELV (5V) SP.
LAARS Heating Systems Page 54 SECTION 5. Control Display and Operation 5.1 Control Dial and Buttons The Control Display Status Light (constant green when operating normally) E The Control Display has a Control Dial (E), 4 buttons (A, B, C, D), and a Liquid Crystal Display (with 72 back-lit segments). This section of this manual gives instruction on how to navigate into the many functions of the Mascot FT and to change temperature set points, set system variables and controller parameters.
Page 55 Mascot FT, Heating Only, Boiler 5.
LAARS Heating Systems Page 56 5.3 Operating Mode Operating Mode After the Power is turned on, and/or the Control Display is turned on , the Control Display will go through a ‘Start Up’ checklist and briefly show a sequence of diagnostic codes before entering into the ‘Operating Mode. It will then display the following information.
Page 57 Mascot FT, Heating Only, Boiler 5.4 Setting the Clock B A C E D The P-950EH Control Display does NOT have a daily timer or programmable thermostat. Setting the Clock a. Press and hold the ‘Clock button’ for about 5 seconds. Set the ‘Year’ by turning the dial E. And then, press the dial E to Save. b. Set the ‘MON’ (Month) by turning the dial E to the desired month number. Then press the dial E to Save. c. Set the ‘DATE’ (1-31, Day of the Month) by turning the dial E.
LAARS Heating Systems Page 58 5.5 CH Set Point Change Mode CH Set point Change Mode B A C E D To change CH Setpoint, press the C button. The CH Icon and current CH Setpoint will flash. Turn the E dial clockwise to increase, and counterclockwise to decrease CH setpoint, until desired temperature is reached. Press E dial to save changes and to Exit.
Page 59 Mascot FT, Heating Only, Boiler 5.6 Status Display Mode Status display mode To change any Status Parameter, to get into the Status Display Mode. Press and Hold Button B Rotate Dial E until you find the Parameter that you wish to change. Tap Dial E to enter that Parameter. Adjust to the setting that you require and then press (tap) Dial E to save and to Exit.
LAARS Heating Systems Page 60 5.7 Installer Mode Installer Mode. These changes are to be made only by a qualified technician. B A C E D To c hange any of the Installer Parameters, Start by turning OFF the Power Display Control. Then, with the power OFF, Press and HOLD (more than 5 seconds) the Button B to the to get into the Installer Mode. Rotate Dial E until you find the Installer Parameter (full list on facing page) that you wish to change. Tap Dial E to enter that Parameter.
Page 61 Mascot FT, Heating Only, Boiler 5.7 Installer Mode (continued) Index Numbers Parameter Description 7: cL Minimum Supply temperature Sets the design supply water temperature based on the maximum outdoor design temperature. Minimum supply temperature must be set at least 9°F below the maximum supply temperature.
LAARS Heating Systems Page 62 5.7 Installer Mode (continued) Index Numbers Parameter Description 27: Cn Cascade Number Cascade Number Range: 0 (Master), 1(slave 1), …., 19(slave 19) “29: CP” has to be set with the total number of units in the cascade before “28: Cn” can be set.
Page 63 Mascot FT, Heating Only, Boiler 5.8 Storage Mode Storage Mode / Indirect Water Heater B A C E D To change Storage Mode Temp, First turn OFF the power to the Control Display. Then Press and Hold Button B to get into the Installer Mode. Rota te Dial E until you find 25:St Tap Dial E to enter Storage Mode. Storage Mode indicates that the boiler is heating the water held in an indirect water heater. When Storage Mode is active, the display will appear as shown.
LAARS Heating Systems Page 64 Outdoor Reset varies the control setpoint based on the outdoor temperature. The reset function works as shown in Figure ‘CH Outdoor Reset’. When the outdoor air temperature reaches 4:OH “high outdoor temperature setpoint”, the control point setting is adjusted to 7:cL “low boiler temperature setpoint”. When the outdoor air temperature reaches 5:OL “low outdoor temperature setpoint” the control setpoint is adjusted to 6:cH “high boiler temperature”.
Page 65 Mascot FT, Heating Only, Boiler 5.11 Error Mode Error mode The Control Display will show the following information when an Error is presented. Flashing Indicate Indicator Error ‘ Er : ’ sign Segment Error Code Er:11 If Communication state is activated NOTE: When communication between the Control Display and the main controller is lost, the will not be displayed.
LAARS Heating Systems Page 66 SECTION 6. Error Codes 6.1 Error Code Error Codes Error Code Description Possible Remedies Recover methods Flame has Extinguished 8 (Eight) Times Press the Power button to clear the Error Code. If Error happens again: 1. Monitor the gas pressure to the appliance while in operation. Ensure pressure is between 3.5 and 14” WC. 2. Check gas valve wire. Ensure connection is secure. 3. Check flame detection sensor. Ensure connections are secure.
Mascot FT, Heating Only, Boiler Page 67 SECTION 6. Error Codes (continued) Error Code Error Code Description Possible Remedies Recover methods Venting (Exhaust) Sensor Open or Short This Error Code will go away when exhaust temperature decreases. If Error happens again: 1. Check Venting (exhaust) temperature sensor. Ensure connections are secure. 2. Check sensor resistance. If resistance is zero, replace the sensor. 3. Check vent pipes for blockage. 4.
LAARS Heating Systems Page 68 SECTION 6. Error Codes (continued) Error Code Error Code Description 70 Register, Ram, Rom, I/O Port, AD Abnormal, Important EPROM Data or Safe Data Abnormal This Error Code will go away when the condition is remedied. If Error happens again: 1. Turn power OFF and ON at the main power switch internal to the appliance. 2. If the problem persists, replace the main control.
Mascot FT, Heating Only, Boiler 6.2 Fault Tree Analysis 1.
LAARS Heating Systems Page 70 6.2 Fault Tree Analysis 2. Gas Detection 3.
Page 71 Mascot FT, Heating Only, Boiler SECTION 7. Trouble Shooting Question 7.1 Diagnostics Answer Make sure that the ON/OFF button on the Control Display has been turned ON. If the monitor on the Control Display is blank, make sure the power cord is plugged and 4A fuses on the main controller in the units are good. Burner dose not ignite when the hot water is opened. Make sure that there is water supplied to the unit. The unit activates once the inlet water flow is over 0 gpm.
LAARS Heating Systems Page 72 7.2 Suggested Corrective Actions This controller is able to record information about the boiler’s condition at the time of the five previous faults or errors. Refer to the Section ‘5.10 Error Mode’ of this manual. Display Nothing shown on display Control Display and blower running at full speed. Nothing is shown in display Control Display and no other boiler components are operating. Nothing is shown on Control Display, but boiler is operating.
Page 73 Mascot FT, Heating Only, Boiler 7.2 Suggested Corrective Actions (continued) Fault TEMPERATURE SENSOR FLAME FAULT Condition Occurs when a temperature sensor has electrically shorted (SHORT) or has become disconnected (OPEN). Occurs when flame is detected when there should be no flame. Diagnostic Reset using manual reset screen on Control Display.
LAARS Heating Systems Page 74 SECTION 8. Maintenance Regular Maintenance - This Manual should be placed in a safe and dry location near the Boiler. Maintenance instructions should be carried out by the following guidelines. Maintenance procedures [ Daily ] - Check that the boiler casing is closed. Check if there is any problem with the Boiler casing and the two upper and lower screws are tightened well. Boiler casing must be closed while it is running.
Mascot FT, Heating Only, Boiler Page 75 8.1 Annual startup & general maintenance - Check the air vent If the air vent valve seems to work freely without leaking, replace cap “A” by twisting all the way on. Loosen cap “A” one turn to allow vent to operate. If vent does not operate correctly, replace the vent. lever completely, the valve or discharge line may be blocked. Shut down the Boiler immediately. Call your qualified service technician to inspect the boiler and system.
LAARS Heating Systems Page 76 8.2 Flushing the Boiler - Flushing the Boiler Flushing the Heat Exchanger of boiler is a complicated procedure. Refer to the following instructions carefully before attempting the procedure. If you do not understand about the procedure, contact an authorized technician or licensed professional. Keep in mind that improper maintenance can void your warranty. 1. Disconnect electric power to the boiler. 2.
Page 77 Mascot FT, Heating Only, Boiler SECTION 9. Installation Check 9.1 Quick View Before Installing - Make sure that there is enough space for installing Water and gas line. Verify vent/air termination is located as required. - All models need for propane Conversion which requires a separate gas conversion manual. Install Water Piping - Boiler loop piping must be sized to the minimums listed in the Boiler manual. Using smaller piping will cause performance problems.
LAARS Heating Systems Page 78 9.2 Final Check Lists (continued) Final check : Connecting the power supply • Please check that the power is 120V AC.
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LAARS Heating Systems Page 80 Casing Parts (80 MBH to 140 MBH) No 2 Description Part Number O-Ring P7 FT1601 B-4 Bolt(M4*8 TH) FT1614 B-6 Bolt(M4*10 FH) FT1544 B-7 Bolt(M4* 10 TH) FT1719 B-9 Bolt(M4*10 Flat) FT1545 B-11 Bolt(M4*12 TH) FT1534 B-14 Bolt(M4*20 TH) FT1546 B-15 Bolt(M4*16 TH) FT1547 Exhaust Duct Ass’y FT1002 7-1 Stainless band FT1603 7-2 Packing FT1604 7-3 Exhaust adaptor(in) FT1605 7-4 Exhaust testing cap FT1606 7-5 O-Ring P85 FT1607 7-6 Exhaust ada
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LAARS Heating Systems Page 82 Heat Exchanger Parts (80 MBH to 140 MBH) No Description Part Number 2 O-Ring P7 FT1601 3 O-ring P22 FT1514 4 0.
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LAARS Heating Systems Page 84 Blower Parts (80 MBH to 140 MBH) No Description Part Number N-2 M5 Nut FT1074 B-2 M3*12 PH FT1075 B-5 M4*8 TH FT1520 B-6 M4*10 FH FT1544 B-8 M4*10 TH FT1064 B-10 M4*12 PH FT1076 B-16 M5*14 FT1077 50 Stainless Band (Φ60) FT1078 51 Intake Hose FT1533 52 Intake silicon adaptor FT1713 53 Fan Guide FT1079 54 Damper Packing FT1080 55 Damper Body FT1081 56 Fan rubber packing FT1082 57 Fan Ass’y FT1405 57-1 Fan FT1406 57-2 Intake Or
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LAARS Heating Systems Page 86 Casing Parts (199 MBH) No 2 Description Part Number O-Ring P7 FT1601 B-4 M4*8 TH+ tapping FT1614 B-6 M4*10 FH+ M/S FT1544 B-7 M4*10 TH+ tapping FT1719 B-9 M4*10 FH FT1545 B-11 M4*12 TH+ M/S FT1534 B-15 M4*16 TH+ tapping FT1547 7 Exhaust Duct Ass'y FT1002 7-1 Stainless band FT1603 7-2 Packing FT1604 7-3 Exhaust adaptor FT1605 7-4 Exhaust testing cap FT1606 7-5 O-Ring P85 FT1607 7-6 Exhaust adaptor (out) FT1608 7-7 O-Ring P75 FT1609
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LAARS Heating Systems Page 88 Heat Exchanger Parts (199 MBH) No Description Part Number 2 O-Ring P7 FT1601 3 O-Ring p22 FT1644 4 0.
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LAARS Heating Systems Page 90 Blower Parts (199 MBH) No Description Part Number N-2 M5 NUT FT1074 B-2 M3*12 PH+ tapping FT1075 B-5 M4*8 TH+ M/S FT1520 B-10 M4*12 PH+ M/S FT1076 47 Fan guide FT1769 48 Damper packing FT1770 49 Damper body FT1081 50 Fan rubber packing FT1082 51 Fan guide packing FT1772 52 Fan ass'y FT1405 52-1 Fan FT1406 52-2 Fan sealing O-Ring ST1038 52-3 AGM venturi FT1773 52-4 AGM O-Ring FT1774 52-5 AGM Body FT1775 53 Stainless band FT1603 54
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LAARS Heating Systems Notes: H2375000D Dimensions and specifications subject to change without notice in accordance with our policy of continuous product improvement. Customer Service and Product Support: 800.900.9276 • Fax 800.559.1583 Headquarters: 20 Industrial Way, Rochester, NH, USA 03867 • 603.335.6300 • Fax 603.335.3355 1869 Sismet Road, Mississauga, Ontario, Canada L4W 1W8 • 905.238.0100 • Fax 905.366.0130 www.Laars.com Litho in U.S.A.