Installation and Operation Instructions Document 1318C Installation and Operation Instructions for MASCOT ® FT Wall-Mounted, Modulating Gas, Condensing, Combination Boiler Model MFTCW 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 maintenance.
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.............................................. 3 Specifications......................................................... 4 Dimensions............................................................ 6 Names of Components.
Page 1 Mascot FT, Wall Mounted, Combination 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. 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 Condensate Hose 1 Wall Mount Bracket 1 2 types of Wall Anchors 4 4 Pressure Relief Valve (CH LINE 3/4˝ 30psi) Model: CASH ACME F-82 1 3” Mesh Screens 2 O-Ring and Gasket Kit 1 Outdoor Sensor with screws and anchors 1 MFTCW140 4.5 GPM Flow Restrictor (dark blue) * MFTCW199 N/A Propane Conversion Orifice 1/2” x 3/4” Bell Coupling for Gas Line 1 1 N/A *A 3.
Page 3 Mascot FT, Wall Mounted, Combination Boiler 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. 1 2 3 4 M F T C SERIES Mascot FT 5 9 10 11 12 13 W A 1 X N CONFIG C - Combi W - Wall Hung Figure 1.
LAARS Heating Systems Page 4 2.2 Specifications Model Name MFTCW140 MAX 140,000 Btu/h MIN 28,000 Btu/h 35°F Rise 7.1 GPM 45°F Rise 5.5 GPM 77°F Rise 3.2 GPM Gas Input Rate Hot Water Capacity Installation Indoor / Wall hung type Flue System Sealed Combustion Direct / Single Vent / Concentric Vent Vent Run 2˝(50ft) , 3˝(100ft) Schedule 40 CPVC, PP, PVC Gas Supply Pressure Manifold Pressure Power Supply NG 3.5˝ WC to 10.5˝ WC LP 8.
Page 5 Mascot FT, Wall Mounted, Combination Boiler 2.2 Specifications (continued) Model Name MFTCW199 MAX 199,000 Btu/h MIN 19,900 Btu/h 35°F Rise 9.88 GPM 45°F Rise 7.7 GPM 77°F Rise 4.8 GPM Gas Input Rate Hot Water Capacity Installation Indoor / Wall hung type Flue System Sealed Combustion Direct / Single Vent / Concentric Vent Vent Run 2˝(50ft) , 3˝(100ft) Schedule 40 CPVC, PP, PVC Gas Supply Pressure Manifold Pressure Power Supply NG 3.5˝ WC to 10.5˝ WC LP 8.
LAARS Heating Systems Page 6 2.
Page 7 Mascot FT, Wall Mounted, Combination Boiler 2.
LAARS Heating Systems Page 8 2.
Page 9 Mascot FT, Wall Mounted, Combination Boiler MFTCW199 # Name of Component # Name of Component 1 Air Vent (air eliminator) 16 Condensate Connection 2 Pressure Relief Valve 17 Condensate Trap 3 Air Intake Collar 18 Air Pressure Switch (condensate) 4 Gas Valve 19 Mixing Valve 5 Air Gas Mixing Pipe 20 Terminal Block 6 DHW Water Tank 21 Control Panel and Display 7 Main PCB 22 Heat Exchanger 8 Manual Power Switch (ON / OFF) 23 Ignition Trans 9 Recirculation Pump DHW /
LAARS Heating Systems Page 10 2.5 Product Flow Paths and Characteristics 2.5.1 Central Heating flow. Combination Boiler Heating Mode. Water in the heating pipe is used for space heating.
Page 11 Mascot FT, Wall Mounted, Combination Boiler 2.5 Product Flow Paths and Characteristics 2.5.2 Domestic Hot Water flow. Combination Boiler Domestic Hot Water Mode. Cold water passes through the exchanger and is heated via a mini indirect tank. The domestic hot water (DHW) is provided on demand.
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.
Page 13 Mascot FT, Wall Mounted, Combination Boiler 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 SECTION 3. Safety Regulations 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, Wall Mounted, Combination Boiler WARNING Do not use the appliance for any other purpose than for heating and hot water. Do not store combustibles or flammable material such as gasoline near the appliance. Do not store other items on or near this boiler. Do not store combustible (flammable) materials such as papers. Do not hang clothes on the vent pipe. This may start a fire. Burn Protection Be cautious when opening the hot water tap. The water is very hot.
LAARS Heating Systems Page 16 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.
Page 17 Mascot FT, Wall Mounted, Combination Boiler 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.
LAARS Heating Systems Page 18 SECTION 4. Installation (continued) 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.
Page 19 Mascot FT, Wall Mounted, Combination Boiler 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.
LAARS Heating Systems Page 20 4.4 Venting (Exhaust) WARNING 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.
Page 21 Mascot FT, Wall Mounted, Combination Boiler 4 . Vent system components must not be mixed 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.
LAARS Heating Systems Page 22 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.
Page 23 Mascot FT, Wall Mounted, Combination Boiler 4.6.
LAARS Heating Systems Page 24 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.
Page 25 Mascot FT, Wall Mounted, Combination Boiler 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.
LAARS Heating Systems Page 26 4.7 Air Supply and Vent Connections at the Appliance 4.7.1 Vent / Air Pipe Lengths Combination Boiler Model MFTCW140/199 Table 6. 3˝ Combustion Air / Vent Pipe 2˝ Combustion Air / Vent Pipe Max Elbow Max Max 100´ (30M) 6 50´ (15M ) * Elbow Max * 4 Maximum Vent / Air Pipe Lengths for either 3” or 2 “ Pipes *Propane models are limited to 25 equivalent feet of 2” vent Note : For additional elbows, reduce maximum allowable length • 5 feet (1.
Page 27 Mascot FT, Wall Mounted, Combination Boiler 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. Provide 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.
Page 28 LAARS Heating Systems 4.8 Vent / Air Pipe Termination Note : For using pipe more than 1 elbow, 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.
Page 29 Mascot FT, Wall Mounted, Combination Boiler 4.
LAARS Heating Systems Page 30 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. (3.2kPa).
Page 31 Mascot FT, Wall Mounted, Combination Boiler 4.9 Gas Supply and Piping (cont) he gas connection fitting is, T 3/4” female NPT on MFTCW140 models 3/4” female NPT on MFTCW199 models he supply line must be sized for the maximum T output of the combination boiler model being installed.
Page 32 SECTION 4. Installation LAARS Heating Systems 4.9 Gas Supply and Piping (cont) Suggested Natural Gas (NG) Layout Suggested Propane Gas (LP) Layout The combination boiler must be installed downstream of the gas meter for adequate gas supply. he gas piping must not be less than 1/2” for MFTCW140 models and 3/4” female NPT on MFTCW199 T models.
Page 33 Mascot FT, Wall Mounted, Combination Boiler SECTION 4. Installation 4.10 Gas Supply Pressure Refer to the illustration. Offset Adjustment. Do Not Adjust without using a combustion analyzer to verify adjustment. Adjust ONLY when in MIN Fire and when using a combustion analyzer. See Section 4.13 for step by step details. Gas Outlet Pressure Port Inlet Gas Pressure Port MFTCW140 MFTCW199 Gas Outlet Pressure Port Inlet Gas Pressure Port Offset Adjustment.
LAARS Heating Systems Page 34 4.11 Gas Setup and Adjustment For the Step by step process to measure CO2 values on the Mascot FT Section 4.13 of this Installation Manual. Mascot FT Wall Combi, Gas Conversion Kit WARNING Document 4288C Standard Factory Setting is for MAX Fire. 9.0% Installer is required to verify combustion settings as part of CO2 @ 0-2,000 ft altitude (Natural Gas). theNOTE: installation process.
Page 35 Mascot FT, Wall Mounted, Combination Boiler SECTION 4. Installation 4.12 High Altitude Installations 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.
LAARS Heating Systems Page 36 SECTION Installation Mascot FT4.Wall Combi, Gas Conversion Kit 4.13 Natural Gas to Propane Conversion Laars Kit Document #4288 Document 4288C The Laars Mascot FT condensing gas boiler is configured for Natural Gas (NG) from the factory. If your gas supply is Propane Gas (LP), your boiler can be converted to burn propane gas as follows: NOTICE The Natural Gas to Propane Conversion Kit included with the Mascot FT, is intended only for altitudes less than 3000 ft.
Page 37 Mascot FT, Wall Mounted, Combination Boiler SECTION 4. Installation Mascot FT Gas WalltoCombi, Gas Conversion Kit 4.
LAARS Heating Systems Page 38 SECTION 4. Installation Mascot FT Wall Combi, Gas Conversion Kit Document 4288C 4.13 Natural Gas to Propane Conversion ON OFF MIN Fire Normal Operation MAX Fire Normal Operation NG Natural LP Propane 3” Vent Size 2” Vent Size ON CE ENON R E Y. REF OFFONL MBH N/A OFF OFF ON DO 140 ON OFF OT NON N/A ON GE N A C H ON ON 199 DIP Switch Settings Table B 9. 10. 11. 12. 13. 14. 15. 16. 17. 18. 19. 20. 21.
Page 39 Mascot FT, Wall Mounted, Combination Boiler SECTION 4. Installation M4.13 ascot FT Wall GasConversion Conversion Kit Natural GasCombi, to Propane Document 4288C NOTE: Installer is required to verify combustion settings as part of the installation process. CO should not exceed 200 ppm. Natural Gas (NG) CO2 value MFTCW (ALL Sizes) 2˝ VENT 3˝ VENT Propane Gas (LP) 2˝ VENT 3˝ VENT MAX FIRE 8.5 - 10.5% 9.5 - 11% MIN FIRE 8 - 10% 9 - 10.
LAARS Heating Systems Page 40 SECTION 4. Installation 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.
Page 41 Mascot FT, Wall Mounted, Combination Boiler SECTION 4. Installation 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 42 SECTION 4. Installation 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 43 Mascot FT, Wall Mounted, Combination Boiler SECTION 4. Installation 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.
LAARS Heating Systems Page 44 SECTION 4. Installation 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.
Page 45 Mascot FT, Wall Mounted, Combination Boiler SECTION 4. Installation 4.17 DHW Flow Restrictors WARNING Only on the MFTCW140 If the appliance has been filled and operational, then the gas, water and power must be completely shut off, and the unit must be drained before proceeding with this instruction. See Section 8 of this installation book. Failure to do so could result in substantial property damage, sever personal injury, or death. A flow restrictor, rated at 3.
LAARS Heating Systems Page 46 SECTION 4. Installation 4.18 Electrical Wiring Connections MFTCW140 Manual Switch Terminal Block L N 0 - 10V External Input 0-10V INPUT TT Thermostat Connection O/S Outdoor Sensor 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.
Page 47 Mascot FT, Wall Mounted, Combination Boiler 4.18 Electrical Wiring Connections (cont) MFTCW199 Terminal Blocks Manual Switch MAIN POWER 0-10V INPUT CH/BOILER PUMP 0 - 10V External Input External CH Pump Main Power Mascot FT Wall Combi, Gas Conversion Kit TT Thermostat Connection O/S Outdoor Sensor Document 4288C 4.19 DIP Switches E REF MBH R ON OFF MIN Fire Normal Operation MAX Fire Normal Operation NG Natural LP Propane 3” Vent Size 2” Vent Size ON OFF LY.
LAARS Heating Systems Page 48 SECTION 4. Installation 4.
Page 49 Mascot FT, Wall Mounted, Combination Boiler SECTION 4. Installation 4.
LAARS Heating Systems Page 50 SECTION 4. Installation 4.
Page 51 Mascot FT, Wall Mounted, Combination Boiler SECTION 4. Installation 4.22 Electrical Connections Connector #, Location, Type PIN 1 SELV (5V) OP.S Operating water temperature sensor SELV (5V) DH.S DHW temperature sensor SELV (5V) I.S Return temperature sensor SELV (5V) BG.S Venting (Exhaust) temperature sensor SELV (5V) ST.S Not Used SELV (5V) SP.
LAARS Heating Systems Page 52 SECTION 5. Control Display and Operation 5.1 Control Dial and Buttons The Control Display Status Light (constant green when operating normally) 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 53 Mascot FT, Wall Mounted, Combination Boiler SECTION 5. Control Display and Operation CH Central Heat Anti-Freeze Mode Storage Heating 5.
LAARS Heating Systems Page 54 SECTION 5. Control Display and Operation 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 55 Mascot FT, Wall Mounted, Combination Boiler SECTION 5. Control Display and Operation 5.
LAARS Heating Systems Page 56 SECTION 5. Control Display and Operation 5.5 DHW Set Point Change Mode DHW Set Point Change Modes The display shows the following information when changing water heating temperature set points. Changing between Celsius and Fahrenheit When the button D is pressed (for more than 5 seconds), temperature unit will toggle between °C and °F.
Page 57 Mascot FT, Wall Mounted, Combination Boiler SECTION 5. Control Display and Operation 5.6 CH Set Point Change Mode Changing between Celsius and Fahrenheit When the button D is pressed (for more than 5 seconds), temperature unit will toggle between °C and °F.
LAARS Heating Systems Page 58 SECTION 5. Control Display and Operation 5.8 Installer Mode These changes are to be made only by a qualified technician. To c hange any of the Installer Parameters, Start by turning OFF the Power to the Display Control. Then, with the power OFF, Press and HOLD (more than 5 seconds) the Button B Installer Mode. to get into the 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 59 Mascot FT, Wall Mounted, Combination Boiler SECTION 5. Control Display and Operation Index 5.
LAARS Heating Systems Page 60 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 6:OH “high outdoor temperature setpoint”, the control point setting is adjusted to 17:cL “low boiler temperature setpoint”. When the outdoor air temperature reaches 7:OL “low outdoor temperature setpoint” the control setpoint is adjusted to 16:cH “high boiler temperature”.
Page 61 Mascot FT, Wall Mounted, Combination Boiler 5.11 Error Mode Flashing Indicate Example Error ‘ Er : ’ will flash Er:11 Error Code Er:11 Display and Controller are communicating NOTE: When communication between the Control Display and the main controller is lost, the will not be displayed.
LAARS Heating Systems Page 62 SECTION 6. Error Codes Error Code 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. Normal operating settings are more than 2.
Page 63 Mascot FT, Wall Mounted, Combination Boiler 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 64 SECTION 6. Error Codes (continued) Error Code Error Code Description 66 Mixing Valve Initial Value Error (Mixing Valve Cannot Return to Initial Position) 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. Check wiring connections to mixing valve. Ensure all are secure. 3. Replace mixing valve. 4. If the problem persists, replace the main control.
Mascot FT, Wall Mounted, Combination Boiler 6.2 Fault Tree Analysis 1.
LAARS Heating Systems Page 66 6.2 Fault Tree Analysis 2. Gas Detection 3.
Page 67 Mascot FT, Wall Mounted, Combination Boiler SECTION 7. Trouble Shooting Question 7.1 Diagnostics Answer Make sure that the ON/OFF button on the Control Panel has been turned ON. If the monitor on the Control Panel 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 68 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 panel and blower running at full speed. Nothing is shown in display control panel and no other boiler components are operating. Nothing is shown on control panel, but boiler is operating.
Page 69 Mascot FT, Wall Mounted, Combination Boiler SECTION 7. Trouble Shooting 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. 7.
LAARS Heating Systems Page 70 SECTION 8. Maintenance Regular Maintenance - This Manual should be placed in a safe and dry location near the Combination 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 Combination boiler casing and the two upper and lower screws are tightened well. Combination boiler casing must be closed while it is running.
Mascot FT, Wall Mounted, Combination Boiler SECTION 8. 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. AA Page 71 8.1 Annual startup & general maintenance seat. If the valve continues to weep, contact your qualified service technician for inspecting the valve and system.
LAARS Heating Systems Page 72 8.2 Flushing the Combination Boiler Flushing the Heat Exchanger is a complicated procedure that should only be done by an authorized technician or licensed professional. Keep in mind that improper maintenance can void your warranty. 1. D isconnect electric power to the combination boiler. 2. C lose the shutoff valves on both hot water outlet and cold water inlet lines. (V1 & V2) V3 V4 V2 V1 3.
Page 73 Mascot FT, Wall Mounted, Combination Boiler 8.3 Draining and Cleaning 1. Place a bucket under the appliance to collect the residual water inside the combination boiler. 2. Press the Power button on the front control panel to turn OFF the electrical power to the combination boiler. 3. Turn off the gas valve. 4. Close water supply valve on the inlet to the appliance. If there is no valve, turn off main water valve. 5. Open the hot water faucets completely. 6.
Page 74 LAARS Heating Systems 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.
Page 75 Mascot FT, Wall Mounted, Combination Boiler 9.2 Final Check Lists (continued) Final check : Connecting the power supply • Please check that the power is 120V AC.
SECTION 10.
S900140007 25 FT1021 Terminal Block S264100062 26 FT1022 Condensate Block APS H850150050 28 FT1024 S325100028 KMC# S489100248 29 IOM Ref 31 H199990175 H190200003 S419100042 A1 15 33 H190200002 S514100107 S115900025 S311200029 16 35 18 36 S264100065 S419100041 19 38 20 39 Mascot FT Combination Boiler MFTCW140 S223100028 S317100009 S122100010 S193000001 S900140007 S549100150 23 40 25 43 S264100062 S549100145 H850150050 S549100141 26 44 28 45 S325100028 S514100105 29 47 31 A2 S489100
LAARS Heating Systems Page 78 MFTCW140 Heat Exchanger & Tank 68 65-1 63 70 69 65 71 72 74 75 76 77 62 60
19100040 1200030 9100155 55 FT1526 CH return pipe FT1219 CH return sensor 56 FT Combination Mascot Boiler FT1220 3-way valve 57 FT1527 CH supply pipe 58 MFTCW140 Kiturami Fire Tube Drawing Number List 19100039 60320029 59 IOM Ref KMC# FT1222 Pump Description Part Number HEAT EXCHANGER ASSEMBLY FT1304 FT1002 FT1306 FT1010 FT1307 FT1014 FT1300 FT1015 FT1309 FT1016 FT1310 FT1019 FT1313 FT1021 FT1315 FT1022 FT1316 FT1024 FT1321 FT1025 CASINGPipe Exhaust Exhaust sensor Duct Assembly Exhaust BK 7133
LAARS Heating Systems Page 80 MFTCW140 Blower and Gas Valve 83 83-1 83 89 86-1 84 85 86-2 89 86-3 86-2 86-4 89 86-5 87 89 88
S311200026 71 FT1324 Temperature sensor FT1325 S312100011 72 Mascot FT Combination Boiler FT1327 S314200007 74 Low level sensor FT1328 Condensate trap S549100134 MFTCW14075 S421200030 76 FT1329 S514100108 KMC# 77 IOM Ref FT1330 H160510020 H190200003 S242100058 83 15 83-1 16 83-2 18 83-3 19 85 20 85 23 86_1 25 86_2 26 86_3 28 H190200002 S549100132 S115900025 S551200026 S264100065 S223100028 S122100010 S345100008 S900140007 S551200001 S264100062 H850150050 S325100028 86_4 29 86_5 31 C
Page 82 MFTCW199 LAARS Heating Systems
Page 83 Mascot FT, Wall Mounted, Combination Boiler MFTCW199 KMC# H190200003 H190200002 S115900025 S264100065 S223100028 S122100010 S900140007 S264100062 H850150050 S325100028 S489100248 H199990175 S419100042 S514100107 S311200029 S419100041 S317100009 S193000001 S549100150 S549100145 S549100141 S514100105 H199990176 S419100040 S311200030 S549100155 S419100039 H160320029 S549100166 H140240002 S311200027 H130120199 S311400021 S311400021 H130210023 Kiturami Fire Tube Drawing Number List Part NumbeDescrip
LAARS Heating Systems Page 84 MFTCW199 DHW Assembly A2 CH Assembly A1
FT1055 33 Wall hung BK(TOP) FT1791 34 Casing ASS'Y Mascot FT, Wall Mounted, Combination Boiler FT1057 35 Wall hung BK(bottom) FT1633 36 Wire adaptor Kiturami Fire Tube MFTCW199 FT1025 37 Pressure gauge KMC# H190200003 H190200002 S115900025 S264100065 S223100028 S122100010 S900140007 S264100062 H850150050 S325100028 S489100248 H199990175 S419100042 S514100107 S311200029 S419100041 S317100009 S193000001 S549100150 S549100145 S549100141 S514100105 H199990176 S419100040 S311200030 S549100155 S419100039 H160320
Page 86 MFTCW199 Heat Exchanger & Tank LAARS Heating Systems
C# 0200003 0200002 5900025 4100065 3100028 2100010 0140007 4100062 0150050 5100028 9100248 9990175 9100042 4100107 1200029 9100041 7100009 3000001 9100150 9100145 9100141 4100105 9990176 9100040 1200030 9100155 9100039 0320029 57 U Clip FT1807 58 CH return pipe FT1219 59 FT, Wall CH return sensor Mascot Mounted, Combination Boiler FT1220 60 3way valve FT1808 61 CH supply pipe MFTCW199 FT1798 62 B-17 20 B-18 23 B-19 25 B-21 26 63 28 64 29 65 31 66 A1 67 68 33 69 35 70 36 71 3
Page 88 MFTCW199 Blower and Gas Valve LAARS Heating Systems
FT1824 77-3 Burner gasket FT1838 77-4 Burner 77-5 Igniter Page 89 Mascot FT, WallFT1763 Mounted, Combination Boiler FT1663 77-6 Igniter gasket FT1310 77-7 Overheat sensor MFTCW199 FT1764 77-8 Burner case (bottom) FT1826 77-9 Refractory FT-175W thru FT-199W Kiturami Fire Tube Drawing Number List FT1783 78 Condensate trap ASS'Y Status Date FanInitials & Gas Valve Description MC# IOM PartNumber NumbeDescription No RefaarsPart (Green=Shared Part, Blue=175/199 Part) CASING FT1074 N-2 M5 NUT FT1002 M4*8 FT1779 B-
LAARS Heating Systems Notes: H2372800C 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.