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  5. Installation And Operation Instructions Manual

Laars mascot ft Installation And Operation Instructions Manual

Manual is about: Wall-Mounted, Modulating Gas, Condensing, Combination Boiler

Summary of mascot ft

  • Page 1

    Installation and operation instructions document 1318 h2372800- 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 vicini...

  • Page 2

    Laars heating systems table of contents section 1 product accessories 1.1 introduction ........................................................... 1 1.2 included with the appliance ................................... 1 section 2 product characteristics 2.1 model nomenclature ...........................

  • Page 3

    Mascot ft combination boiler page 1 item description qty laars wall mounted, combination boiler mftcw140 1 installation instructions and users manual 1 condensate hose 1 wall mount bracket 1 2 types of wall anchors 4 pressure relief valve (ch line 3/4 ˝ 30psi) model: cash acme f-82 1 3” mesh screens...

  • Page 4

    Laars heating systems page 2 items descriptions qty propane conversion orifice 1 o-ring and gasket kit 1 outdoor sensor with screws and anchors 1 1/2” x 3/4” bell coupling for gas line 1 1.2 included with the appliance (continued) figure 1. Model nomenclature 2 3 4 5 6 7 8 9 10 11 12 13 f t c w 1 4 ...

  • Page 5

    Mascot ft combination boiler page 3 model name mftcw140 gas input rate max 140,000 btu/h min 28,000 btu/h hot water capacity 35°f rise 7.1 gpm 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˝(50f...

  • Page 6

    Laars heating systems page 4 description diameter a air intake collar 3" b vent pipe collar 3" c ‘ch’ supply adapter 1" npt d ‘ch’ return adapter 1” npt e ‘dhw’ outlet adapter 3/4” npt f ‘dhw’ inlet adapter 3/4” npt g gas inlet adapter 1/2” npt h condensate line 1/2" npt 2.3 dimensions air intake ve...

  • Page 7

    Mascot ft combination boiler page 5 2.4 names of components # name of component 1 air vent (air eliminator) 2 pressure relief valve 3 air intake collar 4 air gas mixing pipe 5 gas valve 6 dhw water tank 7 main pcb 8 manual power switch (on / off) 9 recirculation pump dhw / ch primary pump 10 'ch' su...

  • Page 8

    Laars heating systems page 6 2.5.1 central heating flow. Combination boiler heating mode. Water in the heating pipe is used for space heating. 2.5 product flow paths and characteristics hydronic supply hydronic return vent combustion air.

  • Page 9

    Mascot ft combination boiler page 7 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. Integral mini indirect tank (dhw) domestic hot water inle...

  • Page 10

    Laars heating systems page 8 section 3 . Safety regulations 3.1 safety symbols warning warning to avoid product damage, personal injury, or even possible death, carefully read, understand, and follow all the instructions in the installation and operation manual before installation, operation and ser...

  • Page 11

    Mascot ft combination boiler page 9 danger vapors from flammable liquids will explode and catch on fire. These will cause death or severe burns. Do not use or store flammable products such as gasoline, solvents or adhesives in the same room or area near the appliance. Keep flammable products far awa...

  • Page 12

    Laars heating systems page 10 before operation 1. Check the gas type (ng/lp) when using or moving the unit for the first time, check if gas type matches with the gas type of the boiler. Check whether the gas type which is supplied is ng (natural gas) or lp (propane) and also check the boiler gas typ...

  • 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) mater...

  • Page 14

    Laars heating systems page 12 section 4. Installation 4.1 location and clearances the mascot ft must be mounted to a suitable wall by a qualified heating contractor under the guidelines of a boiler. The wall may be of concrete or wood. Suitable fasteners for concrete or wood must be used. Failure to...

  • Page 15

    Mascot ft combination boiler page 13 4.2 wall mount bracket • 4.2.1 the installation height and location for your mascot ft depends on your installation scenario. With all clearances considered, and given adequate positioning for air supply and venting, you will need to determine the best position t...

  • Page 16

    Laars heating systems page 14 table 2. Required combustion air pipe material. Combustion air installation standards material united states canada abs ansi/astm d1527 pvc, sch 40 ansi/astm d1785 or d2665 air pipe material must be chosen cpvc, sch 40 ansi/astm f441 cpvc, sch 40, ansi/astm, polypropyle...

  • Page 17

    Mascot ft combination boiler page 15 the mascot ft is standard as a natural gas boiler and must be converted if propane is the desired gas, unless specifically manufactured for propane. Adequate drainage • the appliance should be installed not to damage the adjacent area. If such locations cannot be...

  • Page 18

    Laars heating systems page 16 table 3. Required exhaust vent material. Venting installation standards material united states canada stainless steel ul 1738 venting must be ulc-s636 certified for use as pvc, sch 40 ansi/astm d1785 venting material. The venting material must be chosen cpvc, sch 40 ans...

  • Page 19

    Mascot ft combination boiler page 17 4.5 general location guideline 1. Vent system installation must be in accordance with local codes or, in the absence of local codes, the national fuel gas code, ansi z224.1 /nfpa 54 and/or csa b149.1, natural gas and propane installation code. 2. The boiler is de...

  • Page 20

    Laars heating systems page 18 4.6 locations for vent pipe terminator description us direct vent instal- lations canadian direct vent installations a clearance above grade, veranda, porch, deck, or balcony 12 in (30 cm) 12 in (30 cm) b clearance to window or door that may be opening 12 in (30 cm) 36 ...

  • Page 21

    Mascot ft combination boiler page 19 description us non-direct canadian non-direct a clearance above grade, veranda, porch, deck, or balcony 12 in (30 cm) 12 in (30 cm) b clearance to window or door that may be opening 48 in (120 cm) below or to side of opening; 12 in (30 cm) above opening 36 in (91...

  • Page 22

    Laars heating systems page 20 4.6.3 venting requirements in the commonwealth of massachusetts in massachusetts the following items are required if the side-wall exhaust vent termination is less than seven (7) feet above finished grade in the area of the venting, including but not limited to decks an...

  • Page 23

    Mascot ft combination boiler page 21 notice at the time of removal of an existing boiler, the following steps shall be followed with each appliance remaining connected to the common venting system placed in operation, while the other appliances remaining connected to the common venting system are no...

  • Page 24

    Laars heating systems page 22 4.7 air supply and vent connections at the appliance 4.7.2 direct venting the boiler uses 3˝ or 2˝ diameter exhaust and 3˝ or 2˝diameter intake air ducts. To ensure the draw of air directly from and exhaust of air directly to the outside of the building, create an airti...

  • Page 25

    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/c...

  • Page 26

    Laars heating systems page 24 vertical vent termination • direct vent - vertical terminations with sloped roof horizontal vent termination (cont) • direct vent - optional sidewall snorkel terminations concentric vent termination • direct vent - optional horizontal and vertical concentric vent side w...

  • Page 27

    Mascot ft combination boiler page 25 warning: open flame can cause gas to ignite and result in property damage, severe injury, or loss of life. Note : the mascot ft appliance and all other gas appliances sharing the gas supply line must be firing at maximum capacity to properly measure the inlet sup...

  • Page 28

    Laars heating systems page 26 the gas connection fitting on the unit is 1/2˝ female npt. The supply line must be sized for the maximum output of the combination boiler model being installed. If there are additional gas appliances from the main supply line, you must measure sizes of the supply line a...

  • Page 29

    Mascot ft combination boiler page 27 4.9 gas supply and piping 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”. Suggested propane gas (lp) layout section 4. Installation suggested natural gas (ng) l...

  • Page 30

    Laars heating systems page 28 4.10 gas supply pressure refer to the illustration * . The appliance and its individual shutoff valve must be disconnected from the gas supply piping system during any pressure testing of the system at test pressures in excess of 1/2 psi (3.5 kpa). The appliance must be...

  • Page 31

    Mascot ft combination boiler page 29 section 4. Installation 4.12 high altitude installations and orifices the mascot ft is shipped with a natural gas nozzle (orifice) that is suitable for altitudes up to 3,000 ft. The mascot ft may be installed at elevations up to 10,000 ft, and it can be converted...

  • Page 32

    Laars heating systems page 30 4.13 natural gas to propane conversion laars kit document #4288 customer service and product support: 800.900.9276 • fax 800.559.1583 headquarters: 20 industrial way, rochester, nh 03867 • 603.335.6300 • fax 603.335.3355 1869 sismet road, mississauga, ontario, canada l4...

  • Page 33

    Mascot ft combination boiler page 31 customer service and product support: 800.900.9276 • fax 800.559.1583 headquarters: 20 industrial way, rochester, nh 03867 • 603.335.6300 • fax 603.335.3355 1869 sismet road, mississauga, ontario, canada l4w 1w8 • 905.238.0100 • fax 905.366.0130 www.Laars.Com lit...

  • Page 34

    Laars heating systems page 32 customer service and product support: 800.900.9276 • fax 800.559.1583 headquarters: 20 industrial way, rochester, nh 03867 • 603.335.6300 • fax 603.335.3355 1869 sismet road, mississauga, ontario, canada l4w 1w8 • 905.238.0100 • fax 905.366.0130 www.Laars.Com litho in u...

  • Page 35

    Mascot ft combination boiler page 33 customer service and product support: 800.900.9276 • fax 800.559.1583 headquarters: 20 industrial way, rochester, nh 03867 • 603.335.6300 • fax 603.335.3355 1869 sismet road, mississauga, ontario, canada l4w 1w8 • 905.238.0100 • fax 905.366.0130 www.Laars.Com lit...

  • Page 36

    Laars heating systems page 34 4.14 plumbing guidelines 4.14 plumbing guidelines external plumbing and water connection guidelines - ensure pipe material meets local codes and industry standards. - the pipe end must be clean and free of debris. - do not apply torch heat within 12˝ of the bottom conne...

  • Page 37

    Mascot ft combination boiler page 35 4.14 plumbing guidelines closed type expansion tank ˝ - apply 1˝ pipe to the expansion tank to allow air within the system for exhausting. - pitch any horizontal piping up towards tank 1 inch per 5 feet of piping. - do not install automatic air vents on closed ty...

  • Page 38

    Laars heating systems page 36 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.. Section 4. Installation primary loop ch...

  • Page 39

    Mascot ft combination boiler page 37 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 i...

  • Page 40

    Laars heating systems page 38 4.15 pressure relief valve ensure that the maximum btu/h rating on the pressure relief valve is equal to or greater than the maximum input btu/h rating of the combination boiler. Pressure relief valve must be installed on the ch supply line & dhw outlet line as close to...

  • Page 41

    Mascot ft combination boiler page 39 4.16 disposal of condensate section 4. Installation 1 2 3 4 condensate drain pipe (view is as if side panel were removed) condensate trap high efficiency gas condensing boilers create condensation when operating. Condensation has acidic (ph) of approximately 4-5....

  • Page 42

    Laars heating systems page 40 4.17 dhw flow restrictors section 4. Installation 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 product acc...

  • Page 43

    Mascot ft combination boiler page 41 4.18 electrical wiring connections this appliance must be electrically grounded. Ensure the electrical receptacle that the combination boiler will be plugged into, is properly grounded; if wiring directly. Do not attach the ground wire to either the gas or the wa...

  • Page 44

    Laars heating systems page 42 4.19 dip switches system control setting maximum flame detecting voltage 2.4v pre-purge time (tp) maximum 10s, minimum 1s safety time (igniting time) (ts) 3s igniting interval time 10s post-purge time (tip) 120s (1st : 60s + 2nd 60s) over-heating 1,2,3 protection detect...

  • Page 45

    Mascot ft combination boiler page 43 notes:.

  • Page 46

    Laars heating systems page 44 4.20 control board, electrical diagram section 4. Installation color designations (15-3.11 of ansi y14.15) black (bk) brown (br) red (r) orange (o) yellow (y) green (g) blue (bl) purple (p) gray (gy) white (w) cn8 mcu_write sw1 install capacity 3 fan start coil gnd fan ...

  • Page 47

    Mascot ft combination boiler page 45 4.21 ladder diagram section 4. Installation f/b level air pressure sensor.

  • Page 48

    Laars heating systems page 46 4.22 electrical connections section 4. Installation connector description ht selv #, location, type pin label cn9 65001ws-12 1 - ground ht (120v~) 2 l power supply line ht (120v~) 3 cp1 not used ht (120v~) 4 it igniter ht (120v~) 5 l(ht) pump : ch ht (120v~) 6 gv gas va...

  • Page 49

    Mascot ft combination boiler page 47 4.22 electrical connections connector description ht selv #, location, type pin label cn7 lwd1140-14 1 f.S flame detect sensor selv (5v) 8 2 op.S operating water temperature sensor selv (5v) 9 3 dh.S dhw temperature sensor selv (5v) 10 4 i.S return temperature se...

  • Page 50

    Laars heating systems page 48 section 5. Control display and operation 5.1 control dial and buttons • temperature specifications operating ambient temperature range : -10 to 60°c. Operating relative humidity up to: 90% at 40°c. Shipping & storage temperature range of : -20 to 80°c. Buttons functiona...

  • Page 51

    Mascot ft combination boiler page 49 section 5. Control display and operation 5.2 lcd overview ch mode central heat mode icon can be adjusted anti-freeze mode anti-freeze mode icon storage heating mode stored water being heated, can be adjusted lock mode buttons-locked mode icon communication commun...

  • Page 52

    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 ...

  • Page 53

    Mascot ft combination boiler page 51 5.4 status display mode section 5. Control display and operation 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 temperat...

  • Page 54

    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. * default dhw set-point is 120°f (49°c) • dhw 95-120°f (35 - 49°c) low range...

  • Page 55

    Mascot ft combination boiler page 53 to change ch setpoint, press the button d button. The ch icon and current ch setpoint will flash. Turn the e dial clockwise to increase, and counterclockwise to decrease ch setpoint, until desired temperature is reached. Press e dial to save changes and to exit. ...

  • Page 56

    Laars heating systems page 54 5.8 installer mode section 5. Control display and operation 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 tha...

  • Page 57

    Mascot ft combination boiler page 55 5.8 installer mode the full list of installer mode parameters section 5. Control display and operation 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 sy...

  • Page 58

    Laars heating systems page 56 5.9 outdoor reset adjustment section 5. Control display and operation 5.10 external set point temperature contro l outdoor reset varies the control setpoint based on the outdoor temperature. The reset function works as shown in figure ‘ch outdoor reset’. When the outdoo...

  • Page 59

    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

    Laars heating systems page 58 section 6. Error codes error code error code description possible remedies recover methods 10 flame has extinguished 8 (eight) times press the power button to clear the error code. If error happens again: 1. Monitor the gas pressure to the appliance while in operation. ...

  • Page 61

    Mascot ft combination boiler page 59 error code error code description possible remedies recover methods 35 venting (exhaust) sensor open or short this error code will go away when exhaust temperature decreases. If error happens again: 1. Check venting (exhaust) temperature sensor. Ensure connection...

  • Page 62

    Laars heating systems page 60 error code error code description possible remedies recover methods 66 mixing valve initial value error (mixing valve cannot return to initial position) this error code will go away when the condition is remedied. If error happens again: 1. Turn power off and on at the ...

  • Page 63

    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 e32 dhw ntc open or short e33 op ntc open or short e35 exhaust ntc open or short.

  • Page 65

    Mascot ft combination boiler page 63 question answer burner dose not ignite when the hot water is opened. 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...

  • Page 66

    Laars heating systems page 64 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 corrective action(s) nothing shown on display control panel ...

  • Page 67

    Mascot ft combination boiler page 65 fault condition diagnostic corrective action(s) temperature sensor occurs when a temperature sensor has electrically shorted (short) or has become disconnected (open). Reset using manual reset screen on control panel. (power button) check all the temperature read...

  • Page 68

    Laars heating systems page 66 8.1 annual startup & general maintenance regular maintenance - this manual should be placed in a safe and dry location near the combination boiler. Maintenance instructions should be carried out by the following guidelines. Maintenance procedures [ daily ] - check that ...

  • Page 69

    Mascot ft combination boiler page 67 8.1 annual startup & general maintenance - check the air vent if the air vent valve seems to work freely without leaking, replace cap “a” by twisting all the way on. Loosen cap “a” one turn to allow vent to operate. If vent does not operate correctly, replace the...

  • Page 70

    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. 1. Disconnect electric power to the c...

  • Page 71

    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. Turn off the gas valve. 4....

  • Page 72

    Laars heating systems page 70 9.1 quick view before installing - make sure that there is enough space for installing water and gas line. Verify vent/air termination is located as required. - all models need for propane conversion which requires a separate gas conversion manual. Install water piping ...

  • Page 73

    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 • have you installed an approved pressure relie...

  • Page 74

    Laars heating systems page 72 15 16 29 31 19 20 18 23 25 26 28 15 16 section 6. Parts list and illustrations kmc# iom ref part number description common assemblies will use drawing # of size first created casing h190200003 15 ft1002 exhaust duct ass'y h190200002 16 ft1010 air intake duct ass’y s1159...

  • Page 75

    Mascot ft combination boiler page 73 kmc# iom ref part number description common assemblies will use drawing # of size first created casing h190200003 15 ft1002 exhaust duct ass'y h190200002 16 ft1010 air intake duct ass’y s115900025 18 ft1014 control s264100065 19 ft1015 air pressure switch s223100...

  • Page 76

    Laars heating systems page 74 heat exchanger & tank 70 71 72 74 65 60 62 63 75 76 77 69 68 65-1 65-4 65-6 65-7 65.

  • Page 77

    Mascot ft combination boiler page 75 kmc# iom ref part number description common assemblies will use drawing # of size first created casing h190200003 15 ft1002 exhaust duct ass'y h190200002 16 ft1010 air intake duct ass’y s115900025 18 ft1014 control s264100065 19 ft1015 air pressure switch s223100...

  • Page 78

    Laars heating systems page 76 blower and gas valve 85 89 84 89 87 89 88 89 83 83 86-1 86-2 86-3 86-2 86-4 86-5 83-1.

  • Page 79

    Mascot ft combination boiler page 77 s333100033 65_6 ft1315 ignitor s554100041 65_7 ft1316 burner gasket s322100020 68 ft1321 air vent s419100038 69 ft1322 ch supply upper pipe h120420007 70 ft1323 dhw tank s311200026 71 ft1324 temperature sensor s312100011 72 ft1325 low level sensor s314200007 74 f...

  • Page 80

    Laars heating systems customer service and product support: 800.900.9276 • fax 800.559.1583 headquarters: 20 industrial way, rochester, nh 03867 • 603.335.6300 • fax 603.335.3355 1869 sismet road, mississauga, ontario, canada l4w 1w8 • 905.238.0100 • fax 905.366.0130 www.Laars.Com litho in u.S.A. © ...