Laars mascot ft MFTHW Installation And Operation Instructions Manual
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Laars mascot ft MFTHW Installation And Operation Instructions Manual

Wall-mounted, modulating gas, condensing, heating only, boiler
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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, Heating Only, Boiler
80,000 BTU/hr
Model MFTHW
100,000 BTU/hr
120,000 BTU/hr
140,000 BTU/hr
199,000 BTU/hr
Natural Gas (NG) - Factory Configuration
•
•
Propane Gas (LP) - Field-Convertible
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 1342E
FT
AVERTISSEMENT
GAZ:

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Summary of Contents for Laars mascot ft MFTHW

  • Page 1 Installation and Operation Instructions Document 1342E Installation and Operation Instructions for ASCOT ® Wall-Mounted, Modulating Gas, Condensing, Heating Only, Boiler 80,000 BTU/hr Model MFTHW 100,000 BTU/hr 120,000 BTU/hr 140,000 BTU/hr 199,000 BTU/hr Natural Gas (NG) - Factory Configuration • • Propane Gas (LP) - Field-Convertible FOR YOUR SAFETY: This product must be installed and serviced by a professional service technician, qualified in hot water boiler and heater installation and maintenance.

  • Page 2: Table Of Contents

    LAARS Heating Systems TABLE OF CONTENTS SECTION 1 Product Accessories 1.1 Introduction ............1 4.18 DIP Switches ............49 4.19 Control Board, Electrical Diagram ......50 1.2 Included with the Appliance ........1 4.20 Ladder Diagram ..........51 4.21 Electrical Connections .........52 SECTION 2...

  • Page 3: Product Accessories

    Consult the general instructions contained herein. the LAARS Heating Systems factory, or your local factory All electrical wiring is to be done in accordance with the local representative, with any problems or questions regarding codes, or in the absence of local codes, with: 1) The National this equipment.

  • Page 4: Product Characteristics

    LAARS Heating Systems Page 2 1.2 Included with the Appliance (continued) Items Descriptions 175 / 199 MBH Propane Conversion Orifice 80 / 100 / 120 / 140 MBH O-Ring and Gasket Kit Outdoor Temperature Sensor with anchors and screws SECTION 2.

  • Page 5: Specifications

    Mascot FT, Heating Only, Boiler Page 3 2.2 Specifications, 80 MBH and 100 MBH Model Name MFTHW80 MFTHW100 80,000 Btu/h 100,000 Btu/h Gas Input Rate 16,000 Btu/h 20,000 Btu/h Installation Indoor / Wall hung type Sealed Combustion Direct / Single Vent /Sidewall Flue System Vent Vent Run 2˝(50ft) , 3˝(100ft) Schedule 40 CPVC, PP 0.2”(5.05mm)
  • Page 6 LAARS Heating Systems Page 4 2.2 Specifications, 125 MBH and 140 MBH Model Name MFTHW120 MFTHW140 120,000 Btu/h 140,000 Btu/h Gas Input Rate 24,000 Btu/h 28,000 Btu/h Installation Indoor / Wall hung type Sealed Combustion Direct / Single Vent /Sidewall Flue System Vent Vent Run 2˝(50ft) , 3˝(100ft) Schedule 40 CPVC, PP...
  • Page 7 Mascot FT, Heating Only, Boiler Page 5 2.2 Specifications, 199 MBH Model Name MFTHW199 199,000 Btu/h Gas Input Rate 19,900 Btu/h Installation Indoor / Wall hung type Flue System Sealed Combustion Direct / Single Vent / Concentric Vent Vent Run 2˝(50ft) , 3˝(100ft) Schedule 40 CPVC, PP 0.326˝...

  • Page 8: Dimensions

    LAARS Heating Systems Page 6 2.3 Dimensions 80/100/120/140 MFTHW Heating only boiler Description Diameter Air Intake Collar 3˝ Vent Pipe Collar 3˝ ¼˝ 'CH' Supply Adapter ¼˝ 'CH' Return Adapter Gas Inlet Adapter 3/4˝ Condensate Line 1/2˝...
  • Page 9 Mascot FT, Heating Only, Boiler Page 7 2.3 Dimensions MFTHW Heating only boiler Description Diameter Air Intake Collar 3˝ Vent Pipe Collar 3˝ ¼˝ 'CH' Supply Adapter ¼˝ 'CH' Return Adapter Gas Inlet Adapter 3/4˝ Condensate Line 1/2˝...

  • Page 10: Names Of Components

    LAARS Heating Systems Page 8 2.4 Names of Components 80/100 MFTHW Heating only boiler 4 SCREWS CONTROL DISPLAY COVER (HINGES UPWARD) To remove the cover, unthread the 4 phillips head screws. Keep the screws in a safe place for re-application of cover.
  • Page 11 Mascot FT, Heating Only, Boiler Page 9 2.4 Names of Components (continued) 120/140 MFTHW Heating only boiler Name of Component Name of Component Air Vent (air eliminator) CH Pressure Gauge Air Intake Collar ‘CH’ Return Adapter Air / Gas Mixing Pipe Condensate Trap Gas Inlet Pipe 2 Condensate Adapter...
  • Page 12 LAARS Heating Systems Page 10 2.4 Names of Components (continued) MFTHW Heating only boiler Name of Component Name of Component Air Vent (air eliminator) CH Pressure Gauge Air Intake Collar ‘CH’ Return Adapter Gas Valve Condensate Trap Gas Inlet Pipe 2...

  • Page 13: Product Flow And Characteristics

    Mascot FT, Heating Only, Boiler Page 11 2.5 Product Flow Paths and Characteristics Water in the heating pipe is used for space heating. Combustion Air Intake Vent Gas Input Space Heating Space Heating Hydronic Supply Hydronic Return Water Supply Water Return...

  • Page 14: 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 15 - 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 16: Safety Precautions And Proper Use

    LAARS Heating Systems Page 14 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: Installation

    Mascot FT, Heating Only, Boiler Page 15 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 18: Wall Mount Bracket

    LAARS Heating Systems Page 16 4.2 Wall Mount Bracket 3" to Top of Unit • 4.2.1 The installation height and location for your Anchors Mascot FT depends on your installation scenario. With all clearances considered, and given adequate positioning for...

  • Page 19: Combustion Air

    When taken from the wall, it must Method 1: within 12” (300mm) of the top and one commencing be taken from out-of-doors by means of the LAARS within 12” (300mm) of the bottom, of the enclosure horizontal wall terminal. When taken from the roof, a shall be provided.
  • Page 20 LAARS Heating Systems Page 18 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...

  • Page 21: Venting (Exhaust)

    Mascot FT, Heating Only, Boiler Page 19 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 22: General Location Guidelines

    LAARS Heating Systems Page 20 WARNING 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. instructions. Do not interchange vent systems or materials unless it is specified.

  • Page 23: Locations For Vent Pipe Terminator

    Mascot FT, Heating Only, Boiler Page 21 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 24: Non-Direct Venting Clearances

    LAARS Heating Systems Page 22 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...

  • Page 25: Venting Requirements In Massachusetts

    Mascot FT, Heating Only, Boiler Page 23 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 26: Common Vent Test

    LAARS Heating Systems Page 24 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 27: 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 28: Indoor Combustion Air

    LAARS Heating Systems Page 26 4.7.3 Indoor Combustion Air Read and Follow Sections 4.3 Guidelines First. 1. Insert the termination end cap into the intake air duct. 2. Provide two openings to allow for circulation of combustion air as specified by ANSI Z224.1/NFPA 54.

  • Page 29: Vent / Air Pipe Termination

    Mascot FT, Heating Only, Boiler Page 27 4.8 Vent / Air Pipe Termination Vent Termination Note : For using more than 1 elbow in your 1. Rodent Screen Installation vent pipe, 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 30: Vertical Vent Termination

    LAARS Heating Systems Page 28 4.8 Vent Pipe Termination (continued) Figure 5. Vertical Vent Termination VENT • Direct Vent - Vertical Terminations AIR INLET with Sloped Roof • Direct Vent - Optional Side wall Terminations • Direct Vent - Optional Side wall Terminations Figure 6.

  • Page 31: Gas Supply And Piping

    Mascot FT, Heating Only, Boiler Page 29 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 32 LAARS Heating Systems Page 30 4.9 Gas Supply and Piping (continued) Natural Gas Pipe Sizing (Maximum) Maximum capacity of pipe in cubic feet of gas per hour for gas pressures of 0.5psi or less and a pressure drop of 0.5 Inch water column. (Based of a 0.60 Specific gravity gas) For reference only.
  • Page 33 Mascot FT, Heating Only, Boiler Page 31 Propane Gas Pipe Sizing (Maximum) Intended use : Pipe Sizing Between Single-or Second-Stage (Low Pressure) Regulator and Appliance. For reference only. Referenced from gas pipe manufacturer specifications for actual delivery capacity. The DOE standard for Natural Gas is 1100 BTU/ft3. Contact the local gas supplier for actual BTU/ft3 rating. Inlet Pressure : 11 in.
  • Page 34 LAARS Heating Systems Page 32 4.9 Gas Supply and Piping (continued) recommended that an approved gas union fitting The gas connection fitting on the unit is 3 / 4 ˝ be installed in the supply line between the shut-off female NPT.
  • Page 35 Mascot FT, Heating Only, Boiler Page 33 Suggested Natural Gas (NG) Layout Suggested Propane Gas (LP) Layout Gas Regulator (Supply Press 12˝ ) LP GAS TANK Boiler must be installed downstream of the gas meter for adequate gas supply. Boiler gas connection pipe not less than a 1/2”.

  • Page 36: Gas Supply Pressure

    LAARS Heating Systems Page 34 4.10 Gas Supply Pressure The minimum and maximum inlet gas line pressures must be Natural Gas LP Gas Maximum Pressure 10.5˝ WC Maximum Pressure 13.0” WC Minimum Pressure 3.5˝ WC Minimum Pressure 8.0” WC Gas Valve...

  • Page 37: Gas Set Up And Adjustment

    1869 Sismet Road, Mississauga, Ontario, Canada L4W 1W8 • 905.238.0100 • Fax 905.366.0130 pg 3 of 4 www.Laars.com Litho in U.S.A. © Laars Heating Systems 1607 Document 4296B www.Laars.com Put the boiler cover back on and assemble/tighten the 4 screws that hold the cover in place.

  • Page 38: High Altitude Installations And Orifices

    Nozzle or Orifice to allow full rate operation, in the 199 MBH model please visit www.laars.com/support/sales-reps.aspx to get the contact info for your nearest Laars Sales Representative. See Section 4.13 for instructions to change out the Gas Line Nozzle in the Mascot FT.

  • Page 39: Natural Gas To Propane Conversion

    1869 Sismet Road, Mississauga, Ontario, Canada L4W 1W8 • 905.238.0100 • Fax 905.366.0130 (Applications Engineering) 1869 Sismet Road, Mississauga, Ontario, Canada L4W 1W8 • 905.238.0100 • Fax 905.366.0130 pg 1 of 4 www.Laars.com Litho in U.S.A. © Laars Heating Systems 1607 Document 4296B www.Laars.com...
  • Page 40 1869 Sismet Road, Mississauga, Ontario, Canada L4W 1W8 • 905.238.0100 • Fax 905.366.0130 (Applications Engineering) 1869 Sismet Road, Mississauga, Ontario, Canada L4W 1W8 • 905.238.0100 • Fax 905.366.0130 pg 2 of 4 www.Laars.com Litho in U.S.A. © Laars Heating Systems 1607 Document 4296B www.Laars.com...
  • Page 41 1869 Sismet Road, Mississauga, Ontario, Canada L4W 1W8 • 905.238.0100 • Fax 905.366.0130 (Applications Engineering) 1869 Sismet Road, Mississauga, Ontario, Canada L4W 1W8 • 905.238.0100 • Fax 905.366.0130 pg 3 of 4 www.Laars.com Litho in U.S.A. © Laars Heating Systems 1607 Document 4296B www.Laars.com...
  • Page 42 1869 Sismet Road, Mississauga, Ontario, Canada L4W 1W8 • 905.238.0100 • Fax 905.366.0130 (Applications Engineering) 1869 Sismet Road, Mississauga, Ontario, Canada L4W 1W8 • 905.238.0100 • Fax 905.366.0130 pg 4 of 4 www.Laars.com Litho in U.S.A. © Laars Heating Systems 1607 Document 4296B www.Laars.com...

  • Page 43: Plumbing Guidelines

    Mascot FT, Heating Only, Boiler Page 41 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 44 LAARS Heating Systems Page 42 4.14 Plumbing Guidelines Diaphragm type Expansion tank - The installation of additional air vent is optional. - The air in a diaphragm-type expansion tank is - If the boiler is installed in a closed water supply...
  • Page 45 Mascot FT, Heating Only, Boiler Page 43 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. Gate valve Expansion tank (Closed type)
  • Page 46 LAARS Heating Systems Page 44 4.14 Plumbing Guidelines Zoning with zone valve - In a valve based system, there is one circulator pump at the boiler and each heating zone has a zone valve which opens when the zone. - Each thermostat is wired directly to the corresponding zone valve. Contacts in the zone valves provide a proper signal to the boiler when the valve is opened.
  • Page 47 Mascot FT, Heating Only, Boiler Page 45 4.14 Plumbing Guidelines Indirect Water Heating - Installer is responsible for all equipment and detailing required by local codes. - The minimum pipe size of CH piping should be 1˝ in diameter. valve DHW Tank Valve Pump...

  • Page 48: Pressure Relief Valve

    LAARS Heating Systems Page 46 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 49: Disposal Of Condensate

    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 50: Electrical Wiring Connections

    LAARS Heating Systems Page 48 4.17 Electrical Wiring Connections WARNING Install wiring and electrically ground boiler in accordance with authority having jurisdiction or, in the absence of such requirements, follow the National Electrical Code, NFPA 70, and/or CSA C22.1 Electrical Code-Part 1 in Canada.

  • Page 51: Dip Switches

    1869 Sismet Road, Mississauga, Ontario, Canada L4W 1W8 • 905.238.0100 • Fax 905.366.0130 (Applications Engineering) 1869 Sismet Road, Mississauga, Ontario, Canada L4W 1W8 • 905.238.0100 • Fax 905.366.0130 pg 3 of 4 www.Laars.com Litho in U.S.A. © Laars Heating Systems 1607 Document 4296B www.Laars.com...

  • Page 52: Control Board, Electrical Diagram

    LAARS Heating Systems Page 50 4.19 Control Board, Electrical Diagram Control Board...

  • Page 53: Ladder Diagram

    Mascot FT, Heating Only, Boiler Page 51 4.20 Ladder Diagram...

  • Page 54: Electrical Connections

    LAARS Heating Systems Page 52 4.21 Electrical Connections Connector Description HT SELV #, Location, Type Label CASE GROUND HT (120V~) Power Supply Line HT (120V~) Central Heating Pump HT (120V~) Ignitor HT (120V~) HEAT/CP2 CH Pump HT (120V~) 65001WS-12 Gas Valve...
  • Page 55 Mascot FT, Heating Only, Boiler Page 53 4.21 Electrical Connections Connector Description HT SELV #, Location, Type Label Flame Detect Sensor SELV (5V) OP.S Operating water temperature sensor SELV (5V) DH.S Exhaust temperature sensor SELV (5V) CH Return temperature sensor SELV (5V) LWD1140-14 DHW temperature sensor or...

  • Page 56: Control Display And Operation

    LAARS Heating Systems Page 54 SECTION 5. Control Display and Operation 5.1 Control Dial and Buttons The Control Display Status Light (constant green when operating normally) 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 57: Lcd Overview

    Mascot FT, Heating Only, Boiler Page 55 5.2 LCD Overview Symbol Name Description Service Reminder mode Service Reminder mode indication Outside Temperature Mode Outside Temp setting indication Anti-freeze mode Anti-freeze mode indication Storage mode Storage mode indication Information mode Information mode indication Communication state Communication state indication Time setting mode...

  • Page 58: Operating Mode

    LAARS Heating Systems Page 56 5.3 Operating Mode Operating Mode After the Power is turned on, and/or the Control Display is turned on , the Control Display will go through a ‘Start Up’ checklist and briefly show a sequence of diagnostic codes before entering into the ‘Operating Mode.

  • Page 59: Setting The Clock

    Mascot FT, Heating Only, Boiler Page 57 5.4 Setting the Clock The P-950EH Control Display does NOT have a daily timer or programmable thermostat. Setting the Clock Press and hold the ‘Clock button’ for about 5 seconds. Set the ‘Year’ by turning the dial .

  • Page 60: Ch Set Point Change Mode

    LAARS Heating Systems Page 58 5.5 CH Set Point Change Mode CH Set point Change Mode To c hange CH Setpoint, press the C button. The CH Icon and current CH Setpoint will flash. Turn the E dial clockwise to increase, and counterclockwise to decrease CH setpoint, until desired temperature is reached.

  • Page 61: Status Display Mode

    Mascot FT, Heating Only, Boiler Page 59 5.6 Status Display Mode Status display mode To change any Status Parameter, Press and Hold Button B to get into the Status Display Mode. Rotate Dial E until you find the Parameter that you wish to change. Tap Dial E to enter that Parameter. Adjust to the setting that you require and then press (tap) Dial E to save and to Exit.

  • Page 62: Installer Mode

    LAARS Heating Systems Page 60 5.7 Installer Mode Installer Mode. These changes are to be made only by a qualified technician. To c h ange 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 63 Mascot FT, Heating Only, Boiler Page 61 5.7 Installer Mode (continued) Index Parameter Description Numbers Sets the design supply water temperature based on the maximum outdoor design temperature. Minimum supply Minimum Supply 7: cL temperature must be set at least 9°F below the maximum temperature supply temperature.
  • Page 64 LAARS Heating Systems Page 62 5.7 Installer Mode (continued) Index Parameter Description Numbers Cascade Number Range: 0 (Master), 1(slave 1), …., 19(slave 19) 27: Cn Cascade Number “29: CP” has to be set with the total number of units in the cascade before “28: Cn” can be set. Default 0...

  • Page 65: Storage (Indirect Water Heater)

    Mascot FT, Heating Only, Boiler Page 63 5.8 Storage Mode Storage Mode / Indirect Water Heater To change Storage Mode Temp, First turn OFF the power to the Control Display. Then Press and Hold Button B to get into the Installer Mode. Rota te Dial E until you find Tap Dial E to enter Storage Mode.

  • Page 66: Outdoor Reset Adjustment

    LAARS Heating Systems Page 64 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 “high outdoor 4:OH temperature setpoint”, the control point setting is adjusted to “low boiler temperature setpoint”.

  • Page 67: Error Mode

    Mascot FT, Heating Only, Boiler Page 65 5.11 Error Mode Error mode The Control Display will show the following information when an Error is presented. Flashing Indicate Indicator Error ‘ Er : ’ sign Segment Error Code Er:11 If Communication state is activated NOTE: When communication between the Control Display and the main controller is lost, the will not be displayed.

  • Page 68: Error Codes

    LAARS Heating Systems Page 66 SECTION 6. Error Codes 6.1 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 69 Mascot FT, Heating Only, Boiler Page 67 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 70 2. If the problem persists, replace the display and/or the main control. Cascade Error Please refer to Laars Document 1349 for Cascading the Mascot FT. This Error Code will go away when the condition is remedied. If Error happens again: Low Water Level Sensor 1.
  • Page 71 Mascot FT, Heating Only, Boiler Page 69 6.2 Fault Tree Analysis 1. Flame detection...

  • Page 72: Fault Tree Analysis

    LAARS Heating Systems Page 70 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 73: Trouble Shooting

    Mascot FT, Heating Only, Boiler Page 71 SECTION 7. Trouble Shooting 7.1 Diagnostics Question Answer Make sure that the ON/OFF button on the Control Display has been turned If the monitor on the Control Display is blank, make sure the power cord is plugged and 4A fuses on the main controller in the units are good.

  • Page 74: Suggested Corrective Actions

    LAARS Heating Systems Page 72 7.2 Suggested Corrective Actions This controller is able to record information about the boiler’s condition at the time of the five previous faults or errors. Refer to the Section ‘5.10 Error Mode’ of this manual.
  • Page 75 Mascot FT, Heating Only, Boiler Page 73 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 76: Annual Startup And General Maintenance

    LAARS Heating Systems Page 74 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 Boiler.
  • Page 77 Mascot FT, Heating Only, Boiler Page 75 8.1 Annual startup & general maintenance - Check the air vent If the air vent valve seems to work freely without lever completely, the valve or discharge line may be leaking, replace cap “A” by twisting all the way on. blocked.

  • Page 78: Flushing The Boiler

    LAARS Heating Systems Page 76 8.2 Flushing the Boiler - Flushing the Boiler Flushing the Heat Exchanger of boiler is a complicated procedure. Refer to the following instructions carefully before attempting the procedure. If you do not understand about the procedure, contact an authorized techni- cian or licensed professional.

  • Page 79: Installation Check

    Mascot FT, Heating Only, Boiler Page 77 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 80: Final Check Lists

    LAARS Heating Systems Page 78 9.2 Final Check Lists (continued) Final check : Connecting the power supply • Please check that the power is 120V AC. • Have you checked the polarity of the electrical connection? Final check : Pressure relief valve •...
  • Page 81 Mascot FT, Heating Only, Boiler Page 79...

  • Page 82: Parts List And Illustrations

    LAARS Heating Systems Page 80 Casing Parts (80 MBH to 140 MBH) Description Part Number O-Ring P7 FT1601 Bolt(M4*8 TH) FT1614 Bolt(M4*10 FH) FT1544 Bolt(M4* 10 TH) FT1719 Bolt(M4*10 Flat) FT1545 B-11 Bolt(M4*12 TH) FT1534 B-14 Bolt(M4*20 TH) FT1546 B-15 Bolt(M4*16 TH) FT1547 Exhaust Vent Duct Ass’y...
  • Page 83 Mascot FT, Heating Only, Boiler Page 81...
  • Page 84 LAARS Heating Systems Page 82 Heat Exchanger Parts (80 MBH to 140 MBH) Description Part Number O-Ring P7 FT1601 O-Ring P22 FT1514 0.3” Packing FT1060 3/4” Packing FT1646 1” Packing FT1691 M4 Nut FT1061 M3*6 PH FT1062 M4*8 PH FT1063...
  • Page 85 Mascot FT, Heating Only, Boiler Page 83...
  • Page 86 LAARS Heating Systems Page 84 Blower Parts Description Part Number (80 MBH to 140 MBH) M5 Nut FT1074 M3*12 PH FT1075 M4*8 TH FT1520 M4*10 FH FT1544 M4*10 TH FT1064 B-10 M4*12 PH FT1076 B-16 M5*14 FT1077 Stainless Band (Φ60)
  • Page 87 Mascot FT, Heating Only, Boiler Page 85...
  • Page 88 LAARS Heating Systems Page 86 Casing Parts (199 MBH) Description Part Number O-Ring P7 FT1601 M4*8 TH+ tapping FT1614 M4*10 FH+ M/S FT1544 M4*10 TH+ tapping FT1719 M4*10 FH FT1545 B-11 M4*12 TH+ M/S FT1534 B-15 M4*16 TH+ tapping FT1547...
  • Page 89 Mascot FT, Heating Only, Boiler Page 87...
  • Page 90 LAARS Heating Systems Page 88 Heat Exchanger Parts (199 MBH) Description Part Number O-Ring P7 FT1601 O-Ring P22 FT1644 0.3" Packing FT1060 3/4" Packing FT1646 1” Packing FT1691 M3*6 PH+ M/S FT1062 M4*8 PH+ tapping FT1063 M4*8 TH+ tapping FT1614...
  • Page 91 Mascot FT, Heating Only, Boiler Page 89...
  • Page 92 LAARS Heating Systems Page 90 Blower Parts (199 MBH) Description Part Number M5 NUT FT1074 M3*12 PH+ tapping FT1075 M4*8 TH+ M/S FT1520 B-10 M4*12 PH+ M/S FT1076 Fan guide FT1769 Damper packing FT1770 Damper body FT1081 Fan rubber packing...
  • Page 93 Mascot FT, Heating Only, Boiler Page 91...
  • Page 94 LAARS Heating Systems Page 92 This page intentionally left blank...
  • Page 95 Mascot FT, Heating Only, Boiler Page 93 This page intentionally left blank...
  • Page 96 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. © Laars Heating Systems 1609 Document 1342E...

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