Laars Mighty Therm PW-175 Скачать руководство пользователя страница 9 | Manualshive

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Mighty Therm VW - PW Volume Water Heaters

Page 9

REAR TILE COVER

FLOW SWITCH
CONDUIT

GAP CLOSURE

GROMMET

DRAIN
VALVE

METAL CHANNEL
(FOR CAPILLARY TUBE)

TERMINAL STRIP

HEAT EXCHANGER
ASSEMBLY

GAP CLOSURE

DRAIN PLUG

DRAIN VALVE

REAR TILE
COVER

HEX HEAD
SCREWS

MANUAL RESET
HIGH LIMIT
SWITCH BOX

Figure 15. Heat exchanger reversal.

Figure 16. Flue collector Holddown Clamps.

Flue Collector

Clamp

In/Out Header

Bracket

Heat Exchanger

Clamp

Bracket

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Содержание Mighty Therm PW-175

Страница 1: ...allation 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 lif...

Страница 2: ...re 17 3C Setting the Temperature Controls 17 3D Adjustment for Minimum Input Rate models with modulating gas valve 20 3E Hi Limit Switch Checkout 20 3F Shut Down Procedure 20 SECTION 4 Maintenance 4A...

Страница 3: ...plate installation date and name of the installer Shipping costs are not included in the warranty coverage Some accessory items are shipped in separate packages Inspect everything for damage immediate...

Страница 4: ...y Devices for Automatically Fired Heaters ANSI ASME CSD 1 Any changes to the heater gas controls gas orifices wiring or draft diverter may void the warranty If field conditions require a change to any...

Страница 5: ...as fired appliances within the enclosure Alcove Installation acceptable An alcove suitable for the installation of a heater is a restricted section of a room not separated from the room by a door or p...

Страница 6: ...ible Floors Flashing 4x4 Stringer Roof Base Rail 20 Gauge Galvanized Sheet Metal Cap Roofing Avoid locations where wind deflection off nearby structures might cause wind loading and downdraft conditio...

Страница 7: ...fans can pick up exhaust flue products from the heater and return them inside the building creating a possible health hazard Avoid horizontal runs of the vent pipe and 90 degree elbows reductions and...

Страница 8: ...ver 2 If there is a vent cap or drafthood installed they must be removed before removing the grate top assembly On indoor installations sizes 175 250 the drafthood switch must be disconnected at the l...

Страница 9: ...AL CHANNEL FOR CAPILLARY TUBE TERMINAL STRIP HEAT EXCHANGER ASSEMBLY GAP CLOSURE DRAIN PLUG DRAIN VALVE REAR TILE COVER HEX HEAD SCREWS MANUAL RESET HIGH LIMIT SWITCH BOX Figure 15 Heat exchanger reve...

Страница 10: ...ten the conduit by sliding the retaining nut over the two brown wires inside the control compartment then screwing it down finger tight on the conduit elbow 27 Straighten the capillary tubing and fast...

Страница 11: ...ssociation CGA for outdoor installations such installations are not recommended in areas subject to freezing temperatures unless proper precautions are taken Consult the local factory representative o...

Страница 12: ...Normal 34 2 1 13 3 4 1 19 11 Hard 46 2 9 23 4 7 1 14 8 4 Soft 17 0 7 11 1 3 4 37 21 Normal 17 0 7 11 1 3 4 37 21 Hard 23 1 5 19 5 5 9 27 15 Pressure drop includes head loss of heat exchanger and throu...

Страница 13: ...ank Opening Not Available To Drain Heater Service Valve Pump To Drain Conventional Tank Figure 22 Hot water supply with horizontal tank Note Heavy line indicates heater to tank circulation loop Hot Wa...

Страница 14: ...ng that goes to a floor sink and install a drain valve If a floor sink is not available install a hose bib 8 Hot water tanks in an existing installation are likely to have silt deposits on the bottom...

Страница 15: ...e gas piping from the gas meter to the heater 5 Install a sediment trap drip leg ahead of the gas controls see Figure 24 Fit the trap with a threaded cap which can be removed for cleaning 6 Install a...

Страница 16: ...exactly as shown in the wiring diagram supplied with the heater See Figure 26 and 27 for a typical example of a wiring diagram 3 Electrically interlock the pump and heater so the heater cannot come on...

Страница 17: ...n electric power to the appliance to off 5 Turn manual gas valve off 6 Wait 5 minutes to clear out any gas then smell for gas including near the floor Be sure to smell next to the floor because some t...

Страница 18: ...e 26 Typical example of wiring schematic System 1 IGNITION SYSTEM NO 1 STANDING PILOT ON OFF OR MECHANICAL MODULATION Volume Water Heaters 325 400 Version B Natural or Propane Gas PUMP INCLUDED ON PW...

Страница 19: ...Figure 27 Typical example of wiring schematic System 12 IGNITION SYSTEM NO 12 ELECTRONIC IGNITION ON OFF OR MECHANICAL MODULATION Volume Water Heaters 325 400 Version B Natural or Propane Gas PUMP IN...

Страница 20: ...other flammable liquids and vapors 6 Be sure all combustion air and ventilation openings are not blocked 7 Check for black carbon soot buildup on the external surfaces of the heat exchanger every 6 m...

Страница 21: ...ttempt to repair the gas valve Such attempts will void the warranty and could lead to dangerous results If the gas valve is found to be defective replace it by following these instructions 1 Turn off...

Страница 22: ...tem for leaks using a soap solution Caution Since some leak test solutions including soap and water may cause corrosion or stress cracking rinse the piping with water after testing 22 Reconnect the el...

Страница 23: ...ively starting with the two center bolts Maximum torque is 20 inch pounds 27 Nm Do not over torque 8 Pressure test the heat exchanger for leaks with city water supply before re installing see Figure 3...

Страница 24: ...structions found on the inside of the heater 11 Disconnect the manometer tubing from the gas valve and replace the 1 8 inch 3 2 mm NPT fitting with the original plug 5B Electrical Troubleshooting This...

Страница 25: ...inal see Figure 35 The voltmeter should read 20 to 28VAC 3 If the voltmeter does not show voltage check the electrical power supply 4 If the voltage is less than 20VAC the electrical circuit to the he...

Страница 26: ...usible link fire If the water flow is too low the switch remains open and prevents the heater from firing regardless of the temperature control setting The flow switch is factory mounted and wired Nev...

Страница 27: ...ter from firing 4 Make sure the pilot burner is positioned next to the main burner see Figure 39 and there is no soot or dirt on it 5 Make sure the electrode part of pilot assembly is clean the termin...

Страница 28: ...eter does not show voltage replace the ignition control 6 If the voltmeter reads 20 to 28VAC but there is no pilot ignition check for a air in gas lines b restrictions in gas line valve or pilot tubin...

Страница 29: ...ltage at one terminal and not the other examine the external control It may require service or replacement 2 If everything appears all right measure flame sensing current by connecting a direct curren...

Страница 30: ...10690300 16 Fuse 2 Amp E0084400 17 Switch Flow Outdoor E0013000 18 Fusible Link 175 thru 250 E0099403 19 Switch Toggle On Off E0077000 20 Switch Hi Limit Manual Reset E0015900 Item Description Part Nu...

Страница 31: ...0071700 61 Bushing Brass P0018500 62 Bracket Holddown 10726300 63 Clamp Holddown 10726200 Item Description Part Number JACKET COMPONENTS 64 Jacket Assembly 10568302 05 65 Door 10448902 05 66 Deflector...

Страница 32: ...Drive Moorpark CA 93021 805 529 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 84...

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