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  4. Mighty Stack MS-080
  5. Operating Instructions Manual

Laars Mighty Stack MS-080 Operating Instructions Manual

Summary of Mighty Stack MS-080

  • Page 1

    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 •...

  • Page 2

    Laars heating systems page 2 section 1. General information 1.1 introduction ...................................................... 3 1.2 model identification .......................................... 4 1.3 warranty .......................................................... 4 1.4 dimensions ..........

  • Page 3

    Mighty stack page 3 section 1. General information in the commonwealth of massachusetts, this appliance must be installed by a licensed plumber or gas fitter. 1.1 introduction this manual provides information necessary for the installation, operation, and maintenance of laars heating systems’ mighty...

  • Page 4

    Laars heating systems page 4 1.2 model identification consult the rating plate on the unit. The following information describes the model number structure. Model character designation 1-2 model series designation m s = mighty stack 3-5 gallons 080 = 80 gallons (303 liters) 5-8 size 1 9 9 = 199,900 b...

  • Page 5

    Mighty stack page 5 figure 1. Dimensional data. *air and vent connections may be on top or back of the mighty stack, and are field convertible. Size a b c d in. Cm in. Cm in. Cm in. Cm 199 33.0 84 4 10 5 13 8.75 22 300 39.0 99 4 10 6 15 15 38 399 43.0 109 6 15 7 18 22 56.

  • Page 6

    Laars heating systems page 6 1.6 locating appliance for correct horizontal vent/ducted air distance from outside wall the forced draft combustion air blower in the appliance has sufficient power to pull air and vent properly when the guidelines for horizontal air and vent are followed (see table 1)....

  • Page 7

    Mighty stack page 7 figure 2. Combustion air and vent through roof. Section 2. Venting and combustion air warning for indoor installations, as an additional measure of safety, laars strongly recommends installation of suitable carbon monoxide detectors in the vicinity of this appliance and in any ad...

  • Page 8

    Laars heating systems page 8 2.1.2 intake combustion air the combustion air can be ducted through the wall, or through the roof. When taken from the wall, it must be taken from out-of-doors by means of the laars horizontal wall terminal (see table 1). When taken from the roof, a field-supplied rain ...

  • Page 9

    Mighty stack page 9 term description pipe must comply with ul standard 1738 such as type al29-4c stainless steel (either insulated or non-insulated). Joint sealing follow vent manufacturer's instructions. Table 5. Required horizontal venting material. Avertissement le fonctionnement d’appareils conn...

  • Page 10

    Laars heating systems page 10 u.S. Installations (see note 1) canadian installations (see note 2) a= clearance above grade, veranda, porch, 12 inches (30 cm) 12 inches (30 cm) deck, or balcony b= clearance to window or door that may direct vent only: 12 inches (30 cm) be opened other than direct ven...

  • Page 11

    Mighty stack page 11 on the same wall, locate the vent terminal at least 3 feet (0.9m) horizontally from the combustion air terminal, and locate the vent terminal at least 1 foot (0.3m) above the combustion air terminal. Warning the outdoor vent terminal gets hot. Unit must be installed in such a wa...

  • Page 12

    Laars heating systems page 12 2. A complete parts list for the venting system design or venting system. (d) manufacturer requirements – gas equipment venting system not provided. When the manufacturer of a product approved side wall horizontally vented gas fueled equipment does not provide the parts...

  • Page 13

    Mighty stack page 13 appliance to their previous conditions of use. 7. Any improper operation of the common venting system should be corrected so that the installation conforms with the national fuel gas code, ansi z223.1/nfpa 54 and/or csa b149.1, natural gas and propane installation codes. When re...

  • Page 14

    Laars heating systems page 14 figure 4. Venting..

  • Page 15

    Mighty stack page 15 model and gas type distance from gas meter or last stage regulator 0-100' 0-31 m 100-200' 31-61m 200-300' 61-91m 199 natural 1¼" 3.2 cm 1¼" 3.2 cm 1¼" 3.2 cm 199 propane 1" 2.5 cm 1" 2.5 cm 1¼" 3.2 cm 300 natural 1¼" 3.2 cm 1½" 4.0 cm 1½" 4.0 cm 300 propane 1 2.5 cm 1¼" 3.2 cm 1...

  • Page 16

    Laars heating systems page 16 section 4. Water connections 4.1 water system piping pipe the outlet from the heater’s relief valves such that any discharge from the 2 relief valves will be conducted to a suitable place for disposal when relief occurs. Do not reduce line size or install any valves in ...

  • Page 17

    Mighty stack page 17 figure 4. Suggested plumbing. Figure 5. Suggested plumbing, three units (in first, out last)..

  • Page 18

    Laars heating systems page 18 section 5. Electrical connections warning the appliance must be electrically grounded in accordance with the requirements of the authority having jurisdiction or, in the absence of such requirements, with the latest edition of the national electrical code, ansi/nfpa 70,...

  • Page 19

    Mighty stack page 19 figure 7. Wiring diagram, on/off water heater..

  • Page 20

    Laars heating systems page 20 section 6. Operating instructions 6.1 filling the water heater system 1. Ensure the system is fully connected. Allow system to fill slowly. 2. Start up water heater according to the procedure in this manual. 3. After placing the unit in operation, the ignition system sa...

  • Page 21

    Mighty stack page 21 figure 8. Logic diagram, on/off water heater. Control (f1 and f2). The ignition control will remain in this fault mode, with the blower off. If the power to psw is removed while there is still a call for heat, the ignition sequence will start again, but the main valves will not ...

  • Page 22

    Laars heating systems page 22 9. After placing the appliance in operation, the burner safety shutoff device must be tested. To test: (a) close gas shutoff valve with burner operating. (b) the flame will go out and blower will continue to run for the post purge cycle. Three attempts to light will fol...

  • Page 23

    Mighty stack page 23 section 7. Maintenance 7.1 system maintenance 1. Lubricate the system water-circulating pump, if required, per the instructions on the pump. 2. If a strainer is employed in a pressure reducing valve or the piping, clean it every six months. 3. Inspect the venting system for obst...

  • Page 24

    Laars heating systems page 24 7.2.4 manual reset high limit control the high limit switch is a manual reset, non- adjustable switch with a remote bulb-type sensor. Switches are set at 200°f (93°c).The control is located behind the front door, on a panel in front of the blower. The probe is in the ou...

  • Page 25

    Mighty stack page 25 sensors from all components that are attached to the inlet/outlet header. 4. Isolate the heat exchanger from the water supply. 5. Disconnect the header flanges from the inlet and outlet. 6. Allow the heat exchanger to drain. Remove the venting and remove the top, by removing the...

  • Page 26

    Laars heating systems page 26 section 8. Trouble shooting 8.1 resolving lockouts there are many causes of lockouts. The three most common causes are: (1) inadequate gas supply, (2) poor combustion, (3) ignitor failure. 1. Inadequate gas supply: before proceeding, ensure that the gas supply has not b...

  • Page 27

    Mighty stack page 27 item description size 199 size 300 size 399 combustion chamber components seefigure9 1 assembly, base 2c1000 3c1000 4c1000 2 support, tile notch 2c2109 3c2019 4c2109 3 chamber, refractory, heat exchanger t2108802 t2108803 t2108804 4 assembly, front panel, combustion chamber 2c20...

  • Page 28

    Laars heating systems page 28 jacket components seefigure10 1 assembly, base/support 20l1000 30l1000 40l1000 2 weldment, base, upper level 20l1200 30l1200 40l1200 3 support, corner (4 req'd) 40l2001 40l2001 40l2001 4 support, corner 40l2002 40l2002 40l2002 5 support, corner 40l2003 40l2003 40l2003 6...

  • Page 29

    Mighty stack page 29 control panel components seefigure13 1 switch, pressure, diaphragm, spst e0255500 e0255500 e0255500 2 switch, pressure, diaphragm, spdt e0240900 e0240900 e0240900 3 switch, limit, high temperature, volume water e2324200 e2324200 e2324200 4 transformer, 24, 120v, 50vac e0180500 e...

  • Page 30

    Laars heating systems page 30 figure 9. Combustion chamber components..

  • Page 31

    Mighty stack page 31 figure 10. Jacket components..

  • Page 32

    Laars heating systems page 32 figure 11. Heat exchanger components..

  • Page 33

    Mighty stack page 33 figure 12. Gas train components..

  • Page 34

    Laars heating systems page 34 figure 13. Control panel components..

  • Page 35

    Mighty stack page 35 figure 14. Pump assembly components..

  • Page 36

    H2350400- ® 800.900.9276 • fax 800.559.1583 (customerservice,serviceadvisors) 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. © laars heating systems 1110 d...