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Installation and Operation Instructions
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. Improper installation and/or operation
could create carbon monoxide gas in flue gases which could cause serious injury, property damage, or
death. Improper installation and/or operation will void the warranty.
WARNING
If the information in this manual is not
followed exactly, a fire or explosion may
result causing property damage, personal
injury or loss of life.
Do not store or use gasoline or other
flammable vapors and liquids in the vicinity of
this or any other appliance.
WHAT TO DO IF YOU SMELL GAS
• Do not try to light any appliance.
• Do not touch any electrical switch; do not
use any phone in your building.
• Immediately call your gas supplier from a
nearby phone. Follow the gas supplier's
instructions.
• If you cannot reach your gas supplier, call
the fire department.
Installation and service must be performed
by a qualified installer, service agency, or gas
supplier.
Installation and Operation
Instructions for
M
ASCOT
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
Assurez-vous de bien suivres les instructions
données dans cette notice pour réduire au
minimum le risque d'incendie ou d'explosion
ou pour éviter tout dommage matériel, toute
blessure ou la mort.
Ne pas entreposer ni utiliser d'essence ou ni
d'autres vapeurs ou liquides inflammables dans
le à proximité de cet appareil ou de tout autre
appareil.
QUE FAIRE SI VOUS SENTEZ UNE ODEUR DE
• Ne pas tenter d'allumer d'appareils.
• Ne touchez à aucun interrupteur. Ne pas vous servir
des téléphones dans le bâtiment où vous vous
trovez.
• Appelez immédiatement votre fournisseur de
gaz depuis un voisin. Suivez les instructions
du fournisseur.
• Si vous ne pouvez rejoindre le fournisseur de
gaz, appelez le sservice des incendies.
L'installation et l'entretien doivent être assurés par
un installateur ou un service d'entretien qualifié
ou par le fournisseur de gaz.
Document 1318C
FT
®
AVERTISSEMENT
GAZ:
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Related Manuals for Bradford White Laars MASCOT FT MFTCW140
Summary of Contents for Bradford White Laars MASCOT FT MFTCW140
- Page 1 Installation and Operation Instructions Document 1318C Installation and Operation Instructions for ASCOT ® 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.
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Page 2: Table Of Contents
LAARS Heating Systems TABLE OF CONTENTS SECTION 1 Product Accessories 1.1 Introduction ............1 4.17 DHW Flow Restrictors .........45 4.18 Electrical Wiring Connections ......46 1.2 Included with the Appliance ........1 4.19 DIP Switches ............47 4.20 Control Board, Electrical Diagram ...... 48 SECTION 2 4.21 Ladder Diagram .......... -
Page 3: Product Accessories
Mascot FT, Wall Mounted, Combination Boiler Page 1 SECTION 1 Product Accessories 1.1 Introduction This manual provides information necessary for the 2) CSA B149.1 “Natural Gas and Propane Installation Code” and installation, operation, and maintenance of the LAARS with the requirement of the local utility or other authorities having Heating Systems Mascot FT. - Page 4 LAARS Heating Systems Page 2 1.2 Included with the Appliance (continued) Items Descriptions Condensate Hose Wall Mount Bracket 2 types of Wall Anchors Pressure Relief Valve (CH LINE 3/4˝ 30psi) Model: CASH ACME F-82 3” Mesh Screens O-Ring and Gasket Kit Outdoor Sensor with screws and anchors MFTCW140...
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Page 5: Product Characteristics
Mascot FT, Wall Mounted, Combination Boiler Page 3 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. FUEL ALTITUDE SERIES... -
Page 6: Specifications
LAARS Heating Systems Page 4 2.2 Specifications Model Name MFTCW140 140,000 Btu/h Gas Input Rate 28,000 Btu/h 35°F Rise 7.1 GPM Hot Water Capacity 45°F Rise 5.5 GPM 77°F Rise 3.2 GPM 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... - Page 7 Mascot FT, Wall Mounted, Combination Boiler Page 5 2.2 Specifications (continued) Model Name MFTCW199 199,000 Btu/h Gas Input Rate 19,900 Btu/h 35°F Rise 9.88 GPM Hot Water Capacity 45°F Rise 7.7 GPM 77°F Rise 4.8 GPM Installation Indoor / Wall hung type Flue System Sealed Combustion Direct / Single Vent / Concentric Vent Vent Run...
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Page 8: Dimensions
LAARS Heating Systems Page 6 2.3 Dimensions MFTCW140 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 9 Mascot FT, Wall Mounted, Combination Boiler Page 7 2.3 Dimensions MFTCW199 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”...
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Page 10: Names Of Components
LAARS Heating Systems Page 8 2.4 Names of Components MFTCW140 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 DHW Water Tank... - Page 11 Mascot FT, Wall Mounted, Combination Boiler Page 9 MFTCW199 Name of Component Name of Component Air Vent (air eliminator) Condensate Connection Pressure Relief Valve Condensate Trap Air Intake Collar Air Pressure Switch (condensate) Gas Valve Mixing Valve Air Gas Mixing Pipe Terminal Block DHW Water Tank Control Panel and Display...
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Page 12: Product Flow And Characteristics
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. MFTCW140 MFTCW199 Combustion Combustion Vent Vent Combustion Vent Hydronic Supply Hydronic Supply Hydronic Supply Hydronic Return Hydronic Return... -
Page 13: Domestic Hot Water Flow
Mascot FT, Wall Mounted, Combination Boiler Page 11 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. MFTCW140 MFTCW199 Combustion... -
Page 14: Safety Regulations
LAARS Heating Systems Page 12 SECTION 3 Safety Regulations 3.1 Safety Symbols WARNING WARNING To avoid product damage, personal injury, or even FOR YOUR SAFETY READ BEFORE possible death, carefully read, understand, and OPERATING follow all the instructions in the Installation and Operation manual before installation, operation If you do not follow these instructions exactly, a and service the Boiler. - Page 15 Mascot FT, Wall Mounted, Combination Boiler Page 13 damaging condition that might affect the operation of the unit. Boiler must be checked by a qualified technician before resuming operation. DO NOT use this Boiler if any part has been under water.
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Page 16: Safety Precautions And Proper Use
LAARS Heating Systems Page 14 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 17 Mascot FT, Wall Mounted, Combination Boiler Page 15 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.
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Page 18: Installation
LAARS Heating Systems Page 16 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 19: Wall Mount Bracket
Mascot FT, Wall Mounted, Combination Boiler Page 17 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 20: Combustion Air
LAARS Heating Systems Page 18 SECTION 4. Installation (continued) 4.3 Combustion Air One permanent opening, commencing Method 2: within 12” (300mm) of the top of the enclosure, shall Mascot FT boilers must have provisions for combustion be permitted. The opening shall directly communicate and ventilation air in accordance with the applicable with the outdoors or shall communicate through a requirements for Combustion Air Supply and Ventilation... - Page 21 Mascot FT, Wall Mounted, Combination Boiler Page 19 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;...
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Page 22: Venting (Exhaust)
LAARS Heating Systems Page 20 4.4 Venting (Exhaust) WARNING NOTICE All venting must be installed according to this manual DO NOT COMMON VENT MASCOT FT UNITS. and any other applicable local codes, including but Mascot FT units are never permitted to share a not limited to, ANSI Z224.1/NFPA 54, CAN/CSA vent with Category I appliances. -
Page 23: General Location Guidelines
Mascot FT, Wall Mounted, Combination Boiler Page 21 WARNING 4 . Vent system components must not be mixed with alternate manufacturers certified Failure to vent this Boiler in accordance with components and/or unlisted components. these instructions could cause a fire, resulting 5 . The venting must be installed according in severe property damage, personal injury or to the vent manufacturers installation death. -
Page 24: Locations For Vent Pipe Terminator
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. 4.6.1 Direct Venting Clearances US Direct Vent Instal- Canadian Direct Vent Description lations... -
Page 25: Non-Direct Venting Clearances
Mascot FT, Wall Mounted, Combination Boiler Page 23 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 26: Venting Requirements In Massachusetts
LAARS Heating Systems Page 24 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 of installation, the owner shall have a period of thirty seven (7) feet above finished grade in the area (30) days to comply with the above requirements,... - Page 27 Mascot FT, Wall Mounted, Combination Boiler Page 25 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.
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Page 28: Air Supply And Vent Connections At The Appliance
LAARS Heating Systems Page 26 4.7 Air Supply and Vent Connections at the Appliance 4.7.1 Vent / Air Pipe Lengths 3˝ Combustion Air / Vent Pipe 2˝ Combustion Air / Vent Pipe Combination Boiler Model Elbow Max Elbow Max MFTCW140/199 100´... -
Page 29: Indoor Combustion Air
Mascot FT, Wall Mounted, Combination Boiler Page 27 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 30: Vent / Air Pipe Termination
LAARS Heating Systems Page 28 4.8 Vent / Air Pipe Termination Vent Termination Note : For using pipe more than 1 elbow, 1. Rodent Screen Installation reduce maximum allowable length • Install Rodent Screen and Vent Terminal • 5 feet (1.5M) for each additional 3-inch (additional purchase), see Figure for appropriate 90-degree elbow configuration. - Page 31 Mascot FT, Wall Mounted, Combination Boiler Page 29 4.8 Vent Pipe Termination (cont) Vertical Vent Termination • Direct Vent - Vertical Terminations with Sloped Roof Concentric Vent Termination • Direct Vent - Optional Horizontal and Vertical Concentric Vent Side wall Vent (2"or 3") Roof Vent (2"or 3") Side wall Vent (2"or 3")
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Page 32: Gas Supply And Piping
LAARS Heating Systems Page 30 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 33 Mascot FT, Wall Mounted, Combination Boiler Page 31 4.9 Gas Supply and Piping (cont) The gas shut-off valve in the gas supply line should The gas connection fitting is, be installed close to the unit. 3/4” female NPT on MFTCW140 models To facilitate any future maintenance, it is also 3/4”...
- Page 34 LAARS Heating Systems Page 32 4.9 Gas Supply and Piping (cont) SECTION 4. Installation 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. The gas piping must not be less than 1/2” for MFTCW140 models and 3/4” female NPT on MFTCW199 models.
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Page 35: Gas Supply Pressure
Mascot FT, Wall Mounted, Combination Boiler Page 33 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. -
Page 36: Gas Setup And Adjustment
LAARS Heating Systems Page 34 4.11 Gas Setup and Adjustment For the Step by step process to measure CO 2 values on the Mascot FT Section 4.13 of this Installation Manual. Document 4288C ascot FT Wall Combi, Gas Conversion Kit WARNING Installer is required to verify combustion settings as part of Standard Factory Setting is for MAX Fire. - Page 37 Mascot FT, Wall Mounted, Combination Boiler Page 35 SECTION 4. Installation 4.12 High Altitude Installations The Mascot FT is shipped with a Natural Gas Gas Line Nozzles are used Nozzle or Orifice that is designed for altitudes up in the 140 MBH model to 3,000 ft.
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Page 38: Natural Gas To Propane Conversion
LAARS Heating Systems Page 36 SECTION 4. Installation Document 4288C ascot FT Wall Combi, Gas Conversion Kit 4.13 Natural Gas to Propane Conversion Laars Kit Document #4288 The Laars Mascot FT condensing gas boiler is confi gured 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... - Page 39 Mascot FT, Wall Mounted, Combination Boiler Page 37 SECTION 4. Installation Document 4288C ascot FT Wall Combi, Gas Conversion Kit 4.13 Natural Gas to Propane Conversion Figure A Figure B Gas Valve Combustion Test Port Figure C MFTCW140 MFTCW199 Gas Valve Figure B Gas Valve Figure C...
- Page 40 LAARS Heating Systems Page 38 SECTION 4. Installation Document 4288C ascot FT Wall Combi, Gas Conversion Kit 4.13 Natural Gas to Propane Conversion MIN Fire Normal Operation MAX Fire Normal Operation NG Natural LP Propane 3” Vent Size 2” Vent Size DIP Switch Settings Table B 5 to OFF Per Table B, set DIP Switch...
- Page 41 Mascot FT, Wall Mounted, Combination Boiler Page 39 SECTION 4. Installation Document 4288C ascot FT Wall Combi, Gas Conversion Kit 4.13 Natural Gas to Propane Conversion NOTE: Installer is required to verify combustion settings as part of the installation process. CO should not exceed 200 ppm.
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Page 42: Plumbing Guidelines
LAARS Heating Systems Page 40 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 43 Mascot FT, Wall Mounted, Combination Boiler Page 41 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.. Expansion tank (Diaphragm-type) Automatic air vent...
- Page 44 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.
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Page 45: Pressure Relief Valve
Mascot FT, Wall Mounted, Combination Boiler Page 43 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 46: Disposal Of Condensate
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. -
Page 47: Dhw Flow Restrictors
Mascot FT, Wall Mounted, Combination Boiler Page 45 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 A flow restrictor, rated at 3.2 GPM and white in shut off, and the unit must be drained before color, is pre-installed into the Mascot FT at the DHW proceeding with this instruction. -
Page 48: Electrical Wiring Connections
LAARS Heating Systems Page 46 SECTION 4. Installation 4.18 Electrical Wiring Connections MFTCW140 Manual Switch Terminal Block 0-10V O / S INPUT 0 - 10V Thermostat Outdoor External Input Connection 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 49: Dip Switches
Mascot FT, Wall Mounted, Combination Boiler Page 47 4.18 Electrical Wiring Connections (cont) MFTCW199 Terminal Blocks Manual Switch 0-10V O / S MAIN POWER CH/BOILER PUMP INPUT Main External 0 - 10V Thermostat Outdoor External Input Connection Power CH Pump Sensor Document 4288C ascot FT Wall Combi, Gas Conversion Kit 4.19 DIP Switches MIN Fire Normal Operation... -
Page 50: Control Board, Electrical Diagram
LAARS Heating Systems Page 48 SECTION 4. Installation 4.20 Control Board, Electrical Diagram Control Board... -
Page 51: Ladder Diagram
Mascot FT, Wall Mounted, Combination Boiler Page 49 SECTION 4. Installation 4.21 Ladder Diagram level Air Pressure Sensor... -
Page 52: Electrical Connections
LAARS Heating Systems Page 50 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~) 65001WS-12 Gas Valve HT (120V~) - Page 53 Mascot FT, Wall Mounted, Combination Boiler Page 51 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...
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Page 54: Control Display And Operation
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). -
Page 55: Lcd Overview
Mascot FT, Wall Mounted, Combination Boiler Page 53 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... -
Page 56: Operating Mode
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. -
Page 57: Status Display Mode
Mascot FT, Wall Mounted, Combination Boiler Page 55 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 58: Dhw Set Point Change Mode
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... -
Page 59: Set Point Change Mode
Mascot FT, Wall Mounted, Combination Boiler Page 57 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 110°F... -
Page 60: Installer Mode
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 to get into the Installer Mode. - Page 61 Mascot FT, Wall Mounted, Combination Boiler Page 59 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...
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Page 62: Outside Temperature (Option)
LAARS Heating Systems Page 60 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 adjusted to 17:cL “low boiler temperature setpoint”. -
Page 63: Error Mode
Mascot FT, Wall Mounted, Combination Boiler Page 61 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 64: Error Codes
LAARS Heating Systems Page 62 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 65 Mascot FT, Wall Mounted, Combination Boiler Page 63 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 66 LAARS Heating Systems Page 64 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. Soft Lock (Mixing Valve Cannot Return 2.
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Page 67: Fault Tree Analysis
Mascot FT, Wall Mounted, Combination Boiler Page 65 6.2 Fault Tree Analysis 1. Flame detection... - Page 68 LAARS Heating Systems Page 66 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...
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Page 69: Trouble Shooting
Mascot FT, Wall Mounted, Combination Boiler Page 67 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 70: Suggested Corrective Actions
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 Condition Diagnostic... - Page 71 Mascot FT, Wall Mounted, Combination Boiler Page 69 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...
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Page 72: Annual Startup And General Maintenance
LAARS Heating Systems Page 70 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 73 Mascot FT, Wall Mounted, Combination Boiler Page 71 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”...
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Page 74: Flushing The Boiler
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. -
Page 75: Draining And Cleaning
Mascot FT, Wall Mounted, Combination Boiler Page 73 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. -
Page 76: Installation Check
LAARS Heating Systems Page 74 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 77 Mascot FT, Wall Mounted, Combination Boiler Page 75 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 •...
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Page 78: Parts List And Illustrations
LAARS Heating Systems Page 76 SECTION 10. Parts List and Illustrations MFTCW140 Kiturami Fire Tube Drawing Number List Kiturami Fire Tube Drawing Number List Initials Date Status Description Part Number IOM Ref Initials Date Status Part Number Description IOM Ref CASING CASING FT1002... - Page 79 FT1021 Terminal Block S900140007 FT1022 Condensate Block APS S264100062 Mascot FT Combination Boiler Page 77 FT1024 Kiturami Fire Tube Drawing Number List Display cover window H850150050 FT1025 Pressure gauge S325100028 Initials Part Number Description KMC# IOM Ref FT1027 Condensate trap cover S489100248 MFTCW140 CASING...
- Page 80 LAARS Heating Systems Page 78 MFTCW140 Heat Exchanger & Tank 65-1...
- Page 81 19100040 FT1526 CH return pipe FT1219 CH return sensor 1200030 Mascot FT Combination Boiler Page 79 FT1220 3-way valve 9100155 MFTCW140 19100039 FT1527 CH supply pipe Kiturami Fire Tube Drawing Number List 60320029 FT1222 Pump Initials Date Statu Part Number Description KMC# IOM Ref...
- Page 82 LAARS Heating Systems Page 80 MFTCW140 Blower and Gas Valve 83-1 86-1 86-2 86-3 86-2 86-4 86-5...
- Page 83 S311200026 FT1324 Temperature sensor S312100011 FT1325 Low level sensor Mascot FT Combination Boiler Page 81 S314200007 FT1327 Flame detector sensor S549100134 FT1328 Condensate trap MFTCW140 S421200030 FT1329 Condensate trap hose Kiturami Fire Tube Drawing Number List S514100108 FT1330 Condensate trap connector Initials Date Part Number...
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Page 84: Notes
LAARS Heating Systems Page 82 MFTCW199... - Page 85 Mascot FT, Wall Mounted, Combination Boiler Page 83 MFTCW199 Kiturami Fire Tube Drawing Number List Casing Initials Date aars Part Numbe Description Description Part Number KMC# IOM Ref (Green=Shared Part, Blue=175/199 Part) FT1601 O-Ring P7 CASING FT1614 M4*8 TH+ tapping FT1002 H190200003 Exhaust Duct Assembly...
- Page 86 LAARS Heating Systems Page 84 MFTCW199 DHW Assembly A2 CH Assembly A1...
- Page 87 FT1055 Wall hung BK(TOP) FT1791 Casing ASS'Y Mascot FT, Wall Mounted, Combination Boiler Page 85 FT1057 Wall hung BK(bottom) FT1633 Wire adaptor Kiturami Fire Tube Drawing Number List MFTCW199 FT1025 Pressure gauge Block Ass’y Initials Date aars Part Numbe Description Part Number Description KMC#...
- Page 88 LAARS Heating Systems Page 86 MFTCW199 Heat Exchanger & Tank...
- Page 89 U Clip FT1807 CH return pipe FT1219 CH return sensor Mascot FT, Wall Mounted, Combination Boiler Page 87 FT1220 3way valve FT1808 CH supply pipe MFTCW199 Kiturami Fire Tube Drawing Number List FT1798 Pump (top case+bk) Heat Exchanger & Tank Initials Date Status...
- Page 90 LAARS Heating Systems Page 88 MFTCW199 Blower and Gas Valve...
- Page 91 FT1824 77-3 Burner gasket FT1838 77-4 Burner FT1763 77-5 Igniter Mascot FT, Wall Mounted, Combination Boiler Page 89 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 Condensate trap ASS'Y Initials...
- Page 92 LAARS Heating Systems Notes: Dimensions and specifications subject to change without notice in accordance with our policy of continuous product improvement. 800.900.9276 • Fax 800.559.1583 Customer Service and Product Support: Industrial Way, Rochester, NH, USA 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.