Laars MASCOT FT MFTCW Installation And Operation Instructions Manual

Wall-mounted, modulating gas, condensing, combination boiler

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Page 1 Installation and Operation Instructions Document 1318 Installation and Operation Instructions for ASCOT ® Wall-Mounted, Modulating Gas, Condensing, Combination Boiler Model MFTCW 140,000 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.
Page 2: Table Of Contents
LAARS Heating Systems TABLE OF CONTENTS SECTION 1 Product Accessories 1.1 Introduction ............1 4.17 DHW Flow Restrictors .........40 4.18 Electrical Wiring Connections ......41 1.2 Included with the Appliance ........1 4.19 DIP Switches ............42 4.20 Control Board, Electrical Diagram ...... 44 SECTION 2 4.21 Ladder Diagram ..........
Page 3: Product Accessories
Consult the LAARS Heating All electrical wiring is to be done in accordance with the local Systems factory, or your local factory representative, with any codes, or in the absence of local codes, with: 1) The National problems or questions regarding this equipment.
Page 4: Product Characteristics
LAARS Heating Systems Page 2 1.2 Included with the Appliance (continued) Items Descriptions Propane Conversion Orifice O-Ring and Gasket Kit Outdoor Sensor with screws and anchors 1/2” x 3/4” Bell Coupling for Gas Line SECTION 2. Product Characteristics 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 5: Specifications
20 Industrial Way, Rochester, NH 03867 • 603.335.6300 • Fax 603.335.3355 (Applications Engineering) pg 4 of 4 1869 Sismet Road, Mississauga, Ontario, Canada L4W 1W8 • 905.238.0100 • Fax 905.366.0130 www.Laars.com Litho in U.S.A. © Laars Heating Systems 1503 Document 4288 www.Laars.com...
Page 6: Dimensions
LAARS Heating Systems Page 4 2.3 Dimensions Air Intake Vent Description Diameter Air Intake collar 3" Vent Pipe Collar 3" ‘CH’ Supply Adapter 1" NPT ‘CH’ Return Adapter 1” NPT ‘DHW’ Outlet Adapter 3/4” NPT ‘DHW’ Inlet Adapter 3/4” NPT Gas Inlet Adapter 1/2”...
Page 7: Names Of Components
Mascot FT Combination Boiler Page 5 2.4 Names of Components Hydronic Supply Hydronic Return Name of Component Name of Component Air Vent (air eliminator) Condensate Connection Condensate Trap Pressure Relief Valve Air Intake Collar Air Pressure Switch (condensate) Air Gas Mixing Pipe Mixing Valve Terminal Block Gas Valve...
Page 8: Product Flow And Characteristics
LAARS Heating Systems Page 6 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. Combustion Vent Hydronic Supply Hydronic Return...
Page 9: Domestic Hot Water Flow
Mascot FT Combination Boiler Page 7 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. Combustion Vent Integral Mini...
Page 10: Safety Regulations
Boiler. fire or explosion could result causing property damage, personal injury or loss of life. Laars cannot anticipate every circumstance A. This appliance does not have a pilot. It that might involve a potential hazard. Therefore, is equipped with an ignition device which all possible incidents are not included in our automatically lights the burner.
Page 11 - Make sure that there is no foreign object in the vent understand the Operating Information in this manual passage or rodent screen. before operating the Laars Boiler. - If you do not find any problem, do the following. Be aware of the location of the gas shut-off valve - Turn off the error state by pressing the power button and operation method.
Page 12: Safety Precautions And Proper Use
LAARS Heating Systems Page 10 SECTION 3 Safety Regulations 3.2 Safety Precautions and Proper Use When in Operation CAUTION Before Operation 1. Caution for Gas leak 1. Check the Gas Type (NG/LP) Frequently check for a gas leak at the gas connection When using or moving the unit for the first time, check portion with soapy water.
Page 13 Mascot FT Combination Boiler Page 11 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.
Page 14: Installation
LAARS Heating Systems Page 12 SECTION 4. Installation WARNING 4.1 Location and Clearances Installations must comply with • All the local, state, provincial, and national codes, laws, regulations and ordinances. The Mascot FT must be mounted to a suitable wall by •...
Page 15: Wall Mount Bracket
Mascot FT Combination Boiler Page 13 4.2 Wall Mount Bracket 3" to Top of Unit • 4.2.1 The installation height and location for your Anchors 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 Concrete, position to mount the Wall Mount Bracket.
Page 16: Combustion Air
The combustion air can be taken through the wall, or they connect. through the roof. When taken from the wall, it must be taken from out-of-doors by means of the LAARS Two permanent openings, one commencing Method 1: horizontal wall terminal. When taken from the roof, a within 12”...
Page 17 Mascot FT Combination Boiler Page 15 NOTICE AVIS The instructions for the installation of the venting Les instructions d'installation du système system shall specify that the horizontal portions of d'évacuation doivent préciser que les sections the venting system shall be supported to prevent horizontales doivent être supportées pour prévenir sagging;...
Page 18: Venting (Exhaust)
LAARS Heating Systems Page 16 4.4 Venting (Exhaust) NOTICE AVIS NE PAS ÉVENT COMMUNE MASCOTTE FT UNITÉS. DO NOT COMMON VENT MASCOT FT UNITS. Mascotte FT unités ne sont jamais autorisés à Mascot FT units are never permitted to share a partager un évent Catégorie I avec les appareils.
Page 19: General Location Guidelines
Mascot FT Combination Boiler Page 17 WARNING through an outside wall. F ailure to vent this Boiler in accordance with Vent pipe must pitch upward, toward the vent these instructions could cause a fire, resulting terminal, not less than 1/4” per foot, so that in severe property damage, personal injury or condensate will run back to the Mascot FT to death. drain. Route vent pipe to the heater as directly D o not interchange vent systems or materials as possible. Seal all joints and provide adequate unless it is specified. hangers as required in the venting system manufacturer’s Installation Instructions. Horizontal T he use of thermal insulation covering pipe and portions of the venting system must be supported fittings is prohibited. to prevent sagging and may not have any low D o not apply an electric damper, draft hood or sections that could trap condensate. The unit must vent damper with this Boiler. not support the weight of the vent pipe. D o not locate vent termination where exposed to prevailing winds. Moisture and ice may fall on surface around vent termination. To prevent deterioration, surface must be in good repair (sealed, painted, etc.). 4.5 General Location Guideline 1. V ent system installation must be in accordance - D o not install the vent terminal directly over with Local codes or, in the absence of local codes,...
Page 20: Locations For Vent Pipe Terminator
LAARS Heating Systems Page 18 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.
Page 21: Direct Venting Clearances
Mascot FT Combination Boiler Page 19 4.6.2 Non-Direct Venting (Single Pipe) Clearances Description US Non-Direct Canadian Non-Direct Clearance above grade, veranda, porch, deck, or balcony 12 in (30 cm) 12 in (30 cm) 48 in (120 cm) below or to side of opening; Clearance to window or door that may be opening 36 in (91 cm) 12 in (30 cm) above...
Page 22: Commonwealth Of Massachusetts
LAARS Heating Systems Page 20 4.6.3 V enting Requirements in the Commonwealth of Massachusetts b. In the event that the requirements of the In Massachusetts the following items are required if subdivision cannot be met at the time of completion the side-wall exhaust vent termination is less than...
Page 23: Venting Requirements In Massachusetts
Mascot FT Combination Boiler Page 21 NOTICE AVIS NE PAS ÉVENT COMMUNE MASCOTTE FT UNITÉS. DO NOT COMMON VENT MASCOT FT UNITS. Mascotte FT unités ne sont jamais autorisés à Mascot FT units are never permitted to share a partager un évent Catégorie I avec les appareils. vent with Category I appliances. Common Vent Test NOTE: This section does not describe a method for common venting Mascot FT units.
Page 24: Air Supply And Vent Connections At The Appliance
Tightening — Boiler Collar (Socket) to Vent Pipe & Inlet Pipe - Clean and dry your selected PVC, CPVC vent pipe and Laars Boiler collar (socket). - You can select to the size of vent pipe(2˝ & 3˝), according to the installation conditions.
Page 25: Indoor Combustion Air
Mascot FT Combination Boiler Page 23 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-149.1 Model MFTCW140...
Page 26 LAARS Heating Systems Page 24 4.8 Vent Pipe Termination (cont) Horizontal Vent Termination (cont) • Direct Vent - Optional Sidewall Snorkel Terminations Vertical Vent Termination • Direct Vent - Vertical Terminations with Sloped Roof Concentric Vent Termination • Direct Vent - Optional Horizontal...
Page 27: Gas Supply And Piping
Mascot FT Combination Boiler Page 25 4.9 Gas Supply and Piping WARNING: Gas piping should be supported by suitable hangers or Open flame can cause gas to ignite and result in floor stands, not the appliance. property damage, severe injury, or loss of life. Review the following instructions before proceeding with the installation.
Page 28 LAARS Heating Systems Page 26 SECTION 4. Installation 4.9 Gas Supply and Piping To facilitate any future maintenance, it is also The gas connection fitting on the unit is 1/2˝ recommended that an approved gas union fitting female NPT. be installed in the supply line between the shut-off The supply line must be sized for the maximum valve and the 1/2˝...
Page 29 Mascot FT Combination Boiler Page 27 SECTION 4. Installation 4.9 Gas Supply and Piping Suggested Natural Gas (NG) Layout Suggested Propane Gas (LP) Layout Combination boiler must be installed downstream of the gas meter for adequate gas supply. Combination boiler gas connection pipe not less than a 1/2”.
Page 30: Gas Supply Pressure
LAARS Heating Systems Page 28 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.
Page 31: High Altitude Installations And Orifices
Gas Line Nozzle must be changed out to suit the installation altitude and the desired gas. To order the Gas Line Nozzle to suit your installation altitude and gas, please visit laars.com/support to get the contact info for your nearest Laars Sales Representative. Value Nozzle (NAT) Nozzle (LP) 6.5 mm...
Page 32: Natural Gas To Propane Conversion
20 Industrial Way, Rochester, NH 03867 • 603.335.6300 • Fax 603.335.3355 (Applications Engineering) pg 1 of 4 1869 Sismet Road, Mississauga, Ontario, Canada L4W 1W8 • 905.238.0100 • Fax 905.366.0130 www.Laars.com Litho in U.S.A. © Laars Heating Systems 1503 Document 4288 www.Laars.com...
Page 33 20 Industrial Way, Rochester, NH 03867 • 603.335.6300 • Fax 603.335.3355 (Applications Engineering) manufacturer's instruction supplied with the kit. pg 2 of 4 1869 Sismet Road, Mississauga, Ontario, Canada L4W 1W8 • 905.238.0100 • Fax 905.366.0130 www.Laars.com Litho in U.S.A. © Laars Heating Systems 1503 Document 4288 www.Laars.com...
Page 34 20 Industrial Way, Rochester, NH 03867 • 603.335.6300 • Fax 603.335.3355 (Applications Engineering) pg 3 of 4 1869 Sismet Road, Mississauga, Ontario, Canada L4W 1W8 • 905.238.0100 • Fax 905.366.0130 www.Laars.com Litho in U.S.A. © Laars Heating Systems 1503 Document 4288 Figure E www.Laars.com...
Page 35 20 Industrial Way, Rochester, NH 03867 • 603.335.6300 • Fax 603.335.3355 (Applications Engineering) pg 4 of 4 1869 Sismet Road, Mississauga, Ontario, Canada L4W 1W8 • 905.238.0100 • Fax 905.366.0130 www.Laars.com Litho in U.S.A. © Laars Heating Systems 1503 Document 4288 www.Laars.com...
Page 36: Plumbing Guideline
LAARS Heating Systems Page 34 SECTION 4. Installation 4.14 Plumbing Guidelines External Plumbing and Water Connection CAUTION Guidelines Use at least the MINIMUM pipe size for the entire - Ensure pipe material meets local codes and boiler loop piping (connecting boiler to and from industry standards.
Page 37 Air must remain in the system and return to the tank to provide its air cushion. - DO NOT use a closed type expansion tank in a system with the Laars Gas Combination Boiler. (Automatic air vent has been installed on the boiler.) - If the combination boiler is installed in a closed water supply system, such as one having a backflow preventer in the cold water supply line, it will control thermal expansion.
Page 38 LAARS Heating Systems Page 36 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..
Page 39 Mascot FT Combination Boiler Page 37 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.
Page 40: Pressure Relief Valve
LAARS Heating Systems Page 38 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.
Page 41: Disposal Of Condensate
Ensure that the drain, drainpipe, and anything that will come in contact with the condensate can withstand the acidity, or neutralize the condensate before disposal. Damage caused by failure to install a neutralizer kit or to adequately treat condensate will not be the manufacturer’s responsibility. Contact Laars to order Neutralizer Kit# A2123601 _________________________________________...
Page 42: Dhw Flow Restrictors
LAARS Heating Systems Page 40 SECTION 4. Installation 4.17 DHW Flow Restrictors A flow restrictor, rated at 3.2 GPM and white in color, is pre-installed into the Mascot FT at the DHW inlet adapter. An additional flow restrictor, rated at 4.5 GPM, is blue in color and is packaged with the...
Page 43: Electrical Wiring Connections
Mascot FT Combination Boiler Page 41 SECTION 4. Installation 4.18 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.
Page 44: Dip Switches
LAARS Heating Systems Page 42 SECTION 4. Installation 4.19 DIP Switches Document 4288 ascot FT Gas Conversion Kit DIP switches 6 and 7 have to be set in the OFF position when the boiler is running normally. MIN Fire MIN Fire...
Page 45 Mascot FT Combination Boiler Page 43 Notes:...
Page 46: Control Board, Electrical Diagram
LAARS Heating Systems Page 44 SECTION 4. Installation 4.20 Control Board, Electrical Diagram Control Board...
Page 47: Ladder Diagram
Mascot FT Combination Boiler Page 45 SECTION 4. Installation 4.21 Ladder Diagram level Air Pressure Sensor...
Page 48: Electrical Connections
LAARS Heating Systems Page 46 SECTION 4. Installation 4.22 Electrical Connections Connector Description HT SELV #, Location, Type Label GROUND HT (120V~) Power Supply Line HT (120V~) Not Used HT (120V~) Igniter HT (120V~) L(HT) Pump : CH HT (120V~)
Page 49 Mascot FT Combination Boiler Page 47 SECTION 4. Installation 4.22 Electrical Connections Connector Description HT SELV #, Location, Type Label Flame Detect Sensor SELV (5V) OP.S Operating water temperature sensor SELV (5V) DH.S DHW temperature sensor SELV (5V) Return temperature sensor SELV (5V) LWD1140-14 BG.S...
Page 50: Control Display And Operation
LAARS Heating Systems Page 48 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).
Page 51: Lcd Overview
Mascot FT Combination Boiler Page 49 SECTION 5. Control Display and Operation 5.2 LCD Overview Anti-Freeze Lock Communicating Storage Central Mode Heating Heat Status and Installer Modes Summer Mode (warm weather Flame shutdown) Signal Outside Temp Mode or 0-10V Pump Domestic Hot Water Mode Numeric Display CH mode...
Page 52: Operating Mode
LAARS Heating Systems Page 50 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.
Page 53: Status Display Mode
Mascot FT Combination Boiler Page 51 SECTION 5. Control Display and Operation 5.4 Status Display Mode Digital Display Status Display Parameter Description O:ot Outdoor temperature Current Outdoor temperature A: Li or A: GA Flow unit Current flow value(Li: L/m, GA: GPM) b: It CH Return Water Temperature Current Return Water Sensor Temperature...
Page 54: Dhw Set Point Change Mode
LAARS Heating Systems Page 52 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...
Page 55: Ch Set Point Change Mode
Mascot FT Combination Boiler Page 53 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. Indicate Example Current Operating Temperature...
Page 56: Installer Mode
LAARS Heating Systems Page 54 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.
Page 57 Mascot FT Combination Boiler Page 55 SECTION 5. Control Display and Operation 5.8 Installer Mode Index Parameter Description 1: EH History entry History fault code (E0~E9) 2: cE Clear Error History Clearing of error History buffer 3: In System initialize System initialize to default 4: Fu Flow unit...
Page 58: Outside Temperature (Option)
LAARS Heating Systems Page 56 SECTION 5. Control Display and Operation 5.9 Outdoor Reset Adjustment 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...
Page 59: Error Mode
Mascot FT Combination Boiler Page 57 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.
Page 60: Error Codes
LAARS Heating Systems Page 58 SECTION 6. Error Codes Error Error Code Recover Possible Remedies Code Description methods 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”...
Page 61 Mascot FT Combination Boiler Page 59 SECTION 6. Error Codes (continued) Error Recover Error Code Description Possible Remedies Code methods This Error Code will go away when exhaust temperature decreases. If Error happens again: Venting (Exhaust) Sensor 1. Check Venting (exhaust) temperature sensor. Ensure connections are secure. Soft Lock Open or Short 2.
Page 62 LAARS Heating Systems Page 60 SECTION 6. Error Codes (continued) Error Recover Error Code Description Possible Remedies Code methods This Error Code will go away when the condition is remedied. Mixing Valve Initial Value If Error happens again: Error 1. Turn power OFF and ON at the main power switch internal to the appliance.
Page 63: Fault Tree Analysis
Mascot FT Combination Boiler Page 61 6.2 Fault Tree Analysis 1. Flame detection...
Page 64 LAARS Heating Systems Page 62 6.2 Fault Tree Analysis 2. Gas Detection 3. ‘Storage’, ‘DHW’, ‘OP’, ‘CH overheat’, ‘Exhaust heat’ Sensor detects Error code contents DHW NTC open or short OP NTC open or short Exhaust NTC open or short...
Page 65: Diagnostics
Mascot FT Combination Boiler Page 63 SECTION 7. Trouble Shooting 7.1 Diagnostics Question 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.
Page 66 LAARS Heating Systems Page 64 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.
Page 67: Suggested Corrective Actions
Mascot FT Combination Boiler Page 65 SECTION 7. Trouble Shooting 7.2 Suggested Corrective Actions (continued) Fault Condition Diagnostic Corrective Action(s) Check all the temperature readings of the boiler on the DIAGNOSTICS Occurs when a - TEMPERATURES menu to determine temperature if any sensors are currently displayed sensor has as SHORT or OPEN.
Page 68: Annual Startup And General Maintenance
LAARS Heating Systems Page 66 SECTION 8. Maintenance 8.1 Annual startup & general maintenance Regular Maintenance - Check the power source. Make sure that the power cord is correctly connected. The main power line is connected to - This Manual should be placed in a safe and dry the manual switch box inside a Combination boiler.
Page 69 Mascot FT Combination Boiler Page 67 SECTION 8. Maintenance 8.1 Annual startup & general maintenance - Check the air vent If the air vent valve seems to work freely without seat. If the valve continues to weep, contact your leaking, replace cap “A” by twisting all the way on. qualified service technician for inspecting the valve Loosen cap “A”...
Page 70: Flushing The Boiler
LAARS Heating Systems Page 68 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.
Page 71: Draining And Cleaning
Mascot FT Combination Boiler Page 69 8.3 Draining and Cleaning 1. Place a bucket under the appliance to collect the residual water inside the combination boiler. 2. Press Power button on the front control panel to turn OFF the electrical power to the combination boiler. 3.
Page 72: Installation Check
LAARS Heating Systems Page 70 Section 9 – Installation Check 9.1 Quick View 9.2 Final Check Lists Before Installing Final check : Installation Conditions. - Make sure that there is enough space for • Is the Boiler properly mounted on the wall? installing Water and gas line.
Page 73: Sight Glass
Mascot FT Combination Boiler Page 71 9.2 Final Check Lists (continued) Final check : Connecting the power supply • Please check that the power is 120V AC. • Have you checked the polarity of the electrical connection? Final check : Pressure relief valve •...
Page 74: Parts List And Illustrations
LAARS Heating Systems Page 72 SECTION 6. Parts List and Illustrations Kiturami Fire Tube Drawing Number List Kiturami Fire Tube Drawing Number List Description Common assemblies will use Part Number drawing # of size first created IOM Ref Description Common assemblies will use...
Page 75 FT1021 Terminal Block S900140007 FT1022 Condensate Block APS S264100062 Mascot FT Combination Boiler Page 73 Kiturami Fire Tube Drawing Number List FT1024 Display cover window H850150050 FT1025 Pressure gauge Description Common assemblies will use S325100028 Part Number drawing # of size first created KMC# IOM Ref FT1027...
Page 76 LAARS Heating Systems Page 74 Heat Exchanger & Tank...
Page 77 S549100141 FT1121 DHW filter Cap S514100105 FT1122 DHW connector Mascot FT Combination Boiler Page 75 H199990176 FT1200 DHW hydro Block Ass'y S419100040 FT1218 CH return pipe FT1219 CH return sensor S311200030 FT1220 3way valve S549100155 S419100039 FT1221 CH supply pipe Kiturami Fire Tube Drawing Number List H160320029 FT1222...
Page 78 LAARS Heating Systems Page 76 Blower and Gas Valve 83-1 86-1 86-2 86-3 86-2 86-4 86-5...
Page 79 Mascot FT Combination Boiler Page 77 S333100033 FT1315 Ignitor 65_6 S554100041 FT1316 Burner gasket 65_7 S322100020 FT1321 Air vent S333100033 FT1315 Ignitor 65_6 S419100038 FT1322 CH supply upper pipe S554100041 FT1316 Burner gasket 65_7 H120420007 FT1323 DHW tank S322100020 FT1321 Air vent S311200026 FT1324...
Page 80 Customer Service and Product Support: Industrial Way, Rochester, NH 03867 • 603.335.6300 • Fax 603.335.3355 Headquarters: 1869 Sismet Road, Mississauga, Ontario, Canada L4W 1W8 • 905.238.0100 • Fax 905.366.0130 www.Laars.com Litho in U.S.A. © Laars Heating Systems 1503 Document 1318...

This manual is also suitable for:

Mascot ft Mfthw

Laars MASCOT FT MFTCW Installation And Operation Instructions Manual

Section 1

Product Accessories

Section 2

Product Characteristics

Section 3

Safety Regulations

Section 4

Installation

Section 5

Control Display and Operation

Section 6

Error Codes

Trouble Shooting

Section 7

Maintenance

Section 8

Section 9

Installation Check

Repair Part Diagram

Section 10