Laars VW-PW Series Installation, Operation And Maintenance Instructions Download Page 29 | Manualshive

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Mighty Therm LO-NOx Volume Water Heater

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Summary of Contents for VW-PW Series

Page 1: ...e 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 person...

Page 2: ...s Only 13 2 7 1 General Instructions 13 2 8 Electrical Wiring 14 SECTION 3 Operating Instructions 3 1 Start Up Procedure 15 3 2 Setting the Temperature Controls 15 3 2 1 Remote Water Heater Temperatur...

Page 3: ...er heaters must be installed in accordance with the procedures detailed in this manual or the Laars Heating Systems warranty will be voided The installation must conform to the requirements of the loc...

Page 4: ...t hood to the 6 position Molex plug on the side of the unit see Figure 15 Refer to instruction sheet included with cable 1 2 Warranty Laars Heating Systems Mighty Therm heaters are covered by a limite...

Page 5: ...LO NOx Volume Water Heater Page 5 Figure 2 Figure 3 Figure 4 Figure 5 Figure 6 Figure 7 Figure 8 Figure 9 Figure 10 Figure 11 Figure 13 Figure 14 Figure 15 Drafthood Switch Receptacle Figure 12 OUT O...

Page 6: ...on of a heater is a restricted section of a room not separated from the room by a door or partition and which meets the minimum clearances specified in this manual When the ceiling height exceeds 8 fe...

Page 7: ...tes the most common requirements specify that the space enclosure shall communicate with the outdoors in accordance with method 1 or 2 which follow Where ducts are used they shall be of the same cross...

Page 8: ...be taken by the installer to ensure safe operation In the event that the common vent is Method 2 One permanent opening commencing within 12 30 cm of the top of the enclosure shall be permitted The ope...

Page 9: ...pliances connected to a common vent cannot be assured including prevention of spillage of flue gasses into living spaces common venting should not be applied and appliances should each be vented separ...

Page 10: ...high enough to prevent scaling from hard water yet low enough to avoid erosion by soft water Hardness Grains per Parts Category Gallon per Million Soft 1 through 7 5 17 through 128 Normal 7 6 through...

Page 11: ...Relief Valve Figure 22 Pressure Relief Valve The factory provided pump on the PW heaters is sized to provide proper circulation through the heater and through the heater to tank circulation loop see...

Page 12: ...ailable To Drain Heater Service Valve Pump To Drain Conventional Tank Figure 24 Hot Water Supply with Horizontal Tank Note Heavy line indicates heater to tank circulation loop Hot Water Return from Bu...

Page 13: ...iment trap drip leg ahead of the gas controls see Figure 25 Fit the trap with a threaded cap which can be removed for cleaning valve is directed to an open drain and protected from freezing 2 Install...

Page 14: ...ectrical Code NFPA 70 In Canada use the latest edition of the Canadian Electrical Code CSA C22 2 No 0 Do not rely on the gas or water piping to ground the metal parts of the heater Often plastic pipe...

Page 15: ...trol 10 F 6 C higher The heater s temperature control senses the inlet water temperature to the heater The heater s manual reset high limit and automatic reset high limit if applicable senses heater o...

Page 16: ...is to be performed 5 Turn gas control knob clockwise to OFF 6 Replace heater door A This appliance does not have a pilot light It is equipped with an ignition device which automatically lights the hea...

Page 17: ...eil s il faut proc der l entretien 4 Tournez le bouton de contr l de gaz dans le sens des aiguilles d une montre jusqu la position OFF 5 Replacez le panneau d acc s aux commandes A Cet appareil ne com...

Page 18: ...LAARS Heating Systems Page 18 Figure 29 Mighty Therm LO NOx PW250 OUT OF PRODUCTION...

Page 19: ...Mighty Therm LO NOx Volume Water Heater Page 19 Figure 30 Mighty Therm LO NOx VW250 OUT OF PRODUCTION...

Page 20: ...LAARS Heating Systems Page 20 Figure 31 Mighty Therm LO NOx PW PH 400 OUT OF PRODUCTION...

Page 21: ...Mighty Therm LO NOx Volume Water Heater Page 21 Figure 32 Mighty Therm LO NOx VW HH 400 OUT OF PRODUCTION...

Page 22: ...gas supply fail to shut off turn off the manual gas control valve to the heater refer to troubleshooting section 3 4 Shut Down Procedure Shut down the heater following the instructions in Figures 27 a...

Page 23: ...eft side of the heater 2 Remove the large hex head plug located on the right side of the heater under the in out header see Figure 34 Perform this inspection after 60 days of and after 120 days of ope...

Page 24: ...ive 3 Make sure the gas valve is on and there is gas pressure in the line 4 Check all electrical connections and wiring Finding a loose connection or a charred wire can save a lot of time and money 5...

Page 25: ...tiquetez tous les fils avant de les d brancher Les erreurs de c blage peuvent nuire au bon fonctionnement et tre dangereuses S assurer que l appareil fonctionne ad quatement une fois l entretien termi...

Page 26: ...7 Testing the Fuse To test the fuse 1 Clip a lead of the voltmeter to the grounding terminal 2 Touch the other voltmeter lead to terminal number 1 one on the terminal strip 3 If there is no voltage r...

Page 27: ...Main All R0360400 11 Gas Pipe with Attachment All R0360200 12 Flame Sensor All R0360900 13 Manifold 250 R0365803 400 R0365805 14 Air Inlet Hose All R0360600 ELECTRICAL SYSTEM 15 Fusible Link Assembly...

Page 28: ...affle Retainer All S0083900 Key Model Order No Description No Part No 58 Baffle Heat Exchanger 8 250 10697403 400 10697405 59 End Baffle Heat Exchanger 250 R0365903 400 R0365905 FIREBOX COMPONENTS 60...

Page 29: ...ter Page 29 34 33 30 32 31 26 27 28 23 24 25 29 C See next page for details 64 66 18 B A 62 65 63 54 51 A 3 1 2 B 20 21 61 17 14 Burner Tray See next page for details 4 50 22 C 53 52 46 43 52 51 38 50...

Page 30: ...LAARS Heating Systems Page 30 39 58 57 40 40 44 36 38 41 45 44 45 35 12 16 13 7 10 9 59 59 55 37 41 15 8 6 11 56 OUT OF PRODUCTION...

Page 31: ...Mighty Therm LO NOx Volume Water Heater Page 31 OUT OF PRODUCTION...

Page 32: ...5 529 2000 FAX 805 529 5934 20 Industrial Way Rochester NH 03867 603 335 6300 FAX 603 335 3355 480 S Service Road West Oakville Ontario Canada L6K 2H4 905 844 8233 FAX 905 844 2635 www laars com Litho...

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