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M24G & M36G
GAS OPERATED BOILERS
PARTS AND SERVICE MANUAL
EFFECTIVE AUGUST 29, 2014
Superseding All Previous Parts Lists.
The Company reserves the right to make substitution in the event that items specified are not available.
ERRORS: Descriptive and/or typographic errors are subject to correction.
MARKET FORGE INDUSTRIES
44 Lakeside Avenue, Burlington, Vermont 05401 USA Telephone: (802) 658-6600 Fax: (802) 860-3732
www.mfii.com
P/N 14-0308 (8/14)
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Related Manuals for Market Forge Industries M24G
Summary of Contents for Market Forge Industries M24G
- Page 1 M24G & M36G GAS OPERATED BOILERS PARTS AND SERVICE MANUAL EFFECTIVE AUGUST 29, 2014 Superseding All Previous Parts Lists. The Company reserves the right to make substitution in the event that items specified are not available. ERRORS: Descriptive and/or typographic errors are subject to correction.
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Page 2: Table Of Contents
GAS TRAIN, 200K BTU BOILER SHOWN ..........15 AUGUST 29, 2014 M24G & M36G GAS BOILERS... -
Page 3: Troubleshooting
Gas valve fails to cut off gas supply when Replace gas valve. demands of pressure switch have been met. Water level in gauge glass fluctu- Top shutoff valve on water gauge glass Open. ates up and down. is closed. AUGUST 29, 2014 M24G & M36G GAS BOILERS... - Page 4 Turn on. tion. Thermostat defective. Replace if defective. Loose coil nut. Tighten coil nut. Solenoid coil not energized. Check coil for continuity, if open re- place. Air vent leaking. Not closing. Replace. AUGUST 29, 2014 M24G & M36G GAS BOILERS...
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Page 5: Gas Pressure Adjustments
5 PSI and does not go off when pressure gauge reads 7 PSI, proceed as follows: After making adjustments, replace cover on pres- sure switch box and screw. OPERATING SWITCH HI LIMIT SWITCH AUGUST 29, 2014 M24G & M36G GAS BOILERS... -
Page 6: Water Control Board Tesing Procedure
Use V-O-M to verify that there is power at the • DO NOT remove wires from L 1 & L2 terminals. ‘FW(NO)’ terminal. • Tag wires and remove from probe and relay contact AUGUST 29, 2014 M24G & M36G GAS BOILERS... - Page 7 ‘LED 3’ should remain off. IMPORTANT Jumper wire between ‘LW(1) and ‘GND’ terminals must remain in place to test sec- ondary low water function. IF ANY OF THE FUNCTIONS DO NOT WORK, REPLACE THE BOARD! AUGUST 29, 2014 M24G & M36G GAS BOILERS...
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Page 8: Wiring Diagram
WIRING DIAGRAM WIRING DIAGRAM FOR NEW GENERATION BOILERS – 100K, 200K, 300K BTU AUGUST 29, 2014 M24G & M36G GAS BOILERS... - Page 9 WIRING DIAGRAM SCHEMATIC DIAGRAM FOR NEW GENERATION BOILERS – 100K, 200K, 300K BTU AUGUST 29, 2014 M24G & M36G GAS BOILERS...
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Page 10: 24" Boiler Base Cabinet
Leg, Flanged 6” 10-0326 Caster, 5” 98-3968 Trim, Edge 98-3978 Glass 98-3991 Gasket, Adhesive 98-4010 Panel, Side (Single Panel) 98-3995 Panel, Rear Assembly, 24” 98-3996 Panel, Rear Assembly, 36” 94-5011 Panel Clips (not shown) AUGUST 29, 2014 M24G & M36G GAS BOILERS... -
Page 11: Pressure Switch Box, Without Cover
PRESSURE SWITCH BOX, WITHOUT COVER ITEM PART NO. DESCRIPTION 94-5064 Box, Pressure Switch 10-8410 Pressure Switch, Hi-Limit 10-8411 Pressure Switch, Operating 98-3875 Switch, Drain By-Pass 08-7933 Manifold, Pressure Switches 10-4804 Pressure Gauge 09-4844 Union Elbow, 1/2” AUGUST 29, 2014 M24G & M36G GAS BOILERS... -
Page 12: Control Box Assembly, With And Without Cover
10-5052 Light, Red 08-6450 Transformer, 120-240V 98-1680 Board, Water Level Control 94-5022 Ignition Module 08-6472 Relay Tube 08-6475 Relay Base 98-3877 Relay Bracket 94-5003 Artwork, Control Box 94-5066 Cover 94-5069 Terminal Strip AUGUST 29, 2014 M24G & M36G GAS BOILERS... -
Page 13: Plumbing, Left Side Gas Boiler, 24
Valve, Boiler Feed 08-7959 Condenser, 3/8” Hose, 21” Long 98-3894 Copper, Nozzle 98-3914 Comp Fitting, 3/4” 98-1401 Valve, Check 10-0287 Hose, Drain, 3/4” 10-4137 Clamp, Hose 08-7974 Clamp, Hose 98-3892 Condenser Thermostat 10-1152 Plug AUGUST 29, 2014 M24G & M36G GAS BOILERS... -
Page 14: Front View Gas Boiler, 24", 200K
Safety Valve 10-4556 Air Vent 08-4991 Tee, 3/4”, Side Outlet 94-5065 Cover, Pressure Switch Box 94-5010 Label, Pressure Switch Box 94-5128 Gas Valve, 120V, Propane Kit 08-7970 Hose, Water, 20” 98-3864 Flex Conduite AUGUST 29, 2014 M24G & M36G GAS BOILERS... -
Page 15: Gas Train, 200K Btu Boiler Shown
10-2310 Washer 91-8811 Yoke 10-4754 Glass, Sight Gauge, 6” 90-0039 Rubber & Brass Washer Set 10-2728 Kit, Complete Includes: Valves, Glass 98-3928 Elbow 1/2”, Side Outlet 98-3944 Stud, 1/4-20 98-3945 Kep Nut AUGUST 29, 2014 M24G & M36G GAS BOILERS... - Page 16 Compression Coupling 98-3890 Pilot Tube 94-5099 Spark Pilot and Igniter 94-5129 Pilot Orifice, Prop. 94-5046 Burner 94-5052 Pilot Brkt 08-7119 Orifice, Natural Gas (Brass #30) 08-7120 Orifice, Propane (#45 Black) 08-7118 Orifice Hood AUGUST 29, 2014 M24G & M36G GAS BOILERS...