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Vacuum Motor Circuit Board Single Motor 15amp 120v Part#235S
Contains relay, transformer, mini breaker, and two pairs of low voltage leads.
Circuit board control module is 2" high from board to top of reset button. The reset button and low voltage stem are threaded and attach through the vacuum unit's corresponding holes that are made for this circuit board. Click on photo and print it to use as installation instructions. NOTE: This board does not work on all vacuums. SilentMaster, MD, FloMaster started using boards 08/04.
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Vacuum Motor Circuit Board Dual Motor 15 amp 120v Part#235M
Contains relay, transformer, mini breaker, and two pairs of low voltage leads.
Circuit board control module is 2" high from board to top of reset button. The reset buttons and low voltage stem are threaded and attach through the vacuum unit's corresponding holes that are made for this circuit board.Click on photo and print it to use as installation instructions. SilentMaster, MD, FloMaster started using boards 08/04.
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Vacuum Motor Circuit Board Dual Motor 28 amp 120v Part#235L
Contains relay, transformer, mini breaker, and two pairs of low voltage leads.
Circuit board control module is 2" high from board to top of reset button. The reset buttons and low voltage stem are threaded and attach through the vacuum unit's corresponding holes that are made for this circuit board.Click on photo and print it to use as installation instructions. SilentMaster, MD, FloMaster started using boards 08/04.
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Vacuum Motor Circuit Board Single Motor 8 amp 240v Part#236S
Contains relay, transformer, mini breaker, and two pairs of low voltage leads.
Circuit board control module is 2" high from board to top of reset button. The reset button and low voltage stem are threaded and attach through the vacuum unit's corresponding holes that are made for this circuit board.Click on photo and print it to use as installation instructions.
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Vacuum Motor Circuit Board Dual Motor 12 amp 240v Part#236MX
Contains relay, transformer, mini breaker, and two pairs of low voltage leads.
Circuit board control module is 2" high from board to top of reset button. The reset buttons and low voltage stem are threaded and attach through the vacuum unit's corresponding holes that are made for this circuit board. (Back of board says 120 volt but it is not.)Click on photo and print it to use as installation instructions. NOTE: the two lines from the power cord can go on either input terminal, there is no neutral as indicated on the photo.
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Vacuum Motor Circuit Board Dual Motor 18 amp 240v Part#236L
Contains relay, transformer, mini breaker, and two pairs of low voltage leads.
Circuit board control module is 2" high from board to top of reset button. The reset buttons and low voltage stem are threaded and attach through the vacuum unit's corresponding holes that are made for this circuit board. Replaces older part number 236LX. (Back of board says 120 volt but it is 240 volt.)Click on photo and print it to use as installation instructions.
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Wire Set Part#256G
The wire set can be helpful when installing a new motor or circuit board.
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110 volt Transformer Part#230
Transformer used in some brands and models, such as: S2, B, B2, E2, QE2, S1, S4, C110, C95, M19, M32, M34, M72, M45. Click here to print a Wiring Diagram to use while installing - ALSO view diagrams from part #242.
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240 volt Transformer Part#231
Transformer used in some brands and models, such as: S2, B, B2, E2, QE2, S1, S4, C110, C95, M19, M32, M34, M72, M45. Click here to print a Wiring Diagram to use while installing - ALSO view diagrams from part #242.
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240 volt Transformer Part#231L
Transformer used in some brands and models, such as: SV, SVT, S3, S5, C210, G23. Click here to print a Wiring Diagram to use while installing - ALSO view diagrams from part #242. Depending on availability, you may receive either one of the transformers shown. Both transformers are used for the same application.
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110 volt Transformer Part#232
Transformer used in some brands and models, such as: SV, SVT, S3, S5, C210, G23. Can also be used for smaller models. Click here to print a Wiring Diagram to use while installing - ALSO view diagrams from part #242.
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 This 13 amp relay is no longer available. Use part #242 which is a stronger relay that can handle smaller applications. This relay was originally in MD's 110 and 240 volt models A, B, E, J, S1, S4, M19, M72, C110, C95 (as well as others).
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 This 16 amp relay is no longer available. Use part #242 which is a stronger relay that can handle smaller applications. This relay was originally in MD's 110 and 240 volt models S2, B2, E2, QE2, M32 (as well as others).
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28 amp Relay (also used for smaller units) Part#242
This relay replaces the smaller ones (#240 and #241) previously sold. It ONLY WORKS WITH LARGE TRANSFORMERS (PART #232 if 110-120 volt or #231 if 220-240 volt) which are typically are not in machines under 20 amps - regardless of what you read elsewhere on this website, this relay requires the larger transformer. You can replace your transformer.
The 242 relay works with all kinds of 110 to 240 volt motors, and all minibreakers. It works with an electrical set-up similar to the ones in the following photographed diagrams. Click and print a diagram for wiring a SINGLE MOTOR VACUUM, or DUAL MOTOR VACUUM under 16 amps, or DUAL MOTOR VACUUM over 16 amps. (When in doubt on amps use the diagram for the larger amps.) Wires are not sold here. Use 14 or 16 gauge wires and put on 1/4 inch flag terminals (all available at hardware stores). Use 12 gauge wire for dual motor setups over 17 amps.
To mount it you MUST HAVE 4 x 2.5 inches of space. Do not allow any metal on the relay (besides the bottom) to touch any metal parts on the vacuum except the wires. There are several "feet" on the bottom to use screws (not included) to secure it.
#242 Replaces Omron Relays.
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28 amp Relay with Bracket Part#242B
Used in only several MD MFG models.
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7 amp Mini Breaker Part#252
 1 Review - 0 Comments 7 amp minibreaker for 110 volt and 240 volt vacuum units replaces most all types of 7 amp minibreakers such as snap-ins and square buttons. If the minibreaker is attached to a circuit board the entire board will need to be replaced. (250V -not volts- "VAC" by MPI) This mini breaker replaces all other mini breakers.
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10 amp Mini Breaker Part#250
10 amp minibreaker for 110 volt and 240 volt vacuum units. The one the left (may have not come with imprinted ring originally) replaces most all types of 10 amp minibreakers such as snap-ins and square buttons. If the minibreaker is attached to a circuit board the entire board will need to be replaced. (250V - not volts - "VAC" by MPI) This mini breaker replaces all other mini breakers.
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15 amp Mini Breaker Part#251
15 amp minibreaker for 110 volt and 240 volt vacuum units replaces most all types of 15 amp minibreakers such as snap-ins and square buttons. If the minibreaker is attached to a circuit board the entire board will need to be replaced. (250V -not volts- "VAC" by MPI) This mini breaker replaces all other mini breakers.
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20 amp Snap-in Minibreaker Reset Part#253S
20 amp minibreaker for 110 volt and 240 volt vacuum units replaces most all types of 20 amp minibreakers such as snap-ins and square buttons. If the minibreaker is attached to a circuit board the entire board will need to be replaced. (250V -not volts- "VAC" by MPI)
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Low Voltage Booster Box Part#140LV
Splice this booster into a vacuum's low voltage wiring system, plug it into 110 volts, and your 24 volt line will be boosted with plenty of juice! The two blue wires connect to your power unit low voltage (you can use speaker wire to extent any of the wire here) and the red and yellow (or two red) wires connect to the low voltage leads coming from the install site. Simply hang the box on your wall with a nail into a stud. Be sure to use wire nuts to get good connections when joining the wires together.
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Low Voltage Toggle Switch Part#244
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Low Voltage Rocker Switch Part#244R
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30 amp Receptacle for units 110 volt over 20 amps Part#267
1 Review - 0 Comments The plug is called a Nema 5-30 Socket or Plug. The large 110 volt plug goes into it. The plug is larger than 240 volt plugs and one prong looks like an "L". This socket fits into and can be used with a single gang box. Detailed information and line drawing.
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Central Vacuum Wireless Remote Control (RF) Part#145
This is the easiest way to bypass damaged low voltage wiring and remotely start your vacuum unit. Simply install the receiver near the vacuum unit and click the key fob to turn the suction on and off. Surprise - your low voltage wiring troubles are over.
Range is similar to a vehicle key fob - about 150 feet depending on wall thickness and barriers. The powerful 400 mhz is sufficient for nearly all homes. Each receiver is programmed separately so you can have multiple systems in adjoining homes and condos. Extra key fobs sold separately. PDF of Instructions
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Remote Clicker Key Fob Alone Part#145KT
Key fob remote for the #145 Wireless Controller for Central Vacuum Systems. You can have up to 15 key fobs per #145 receiver. To program, hold key fob button for 3 seconds, release; press and release the button on receiver once. Press the key fob button once and the vacuum will turn on. Press it again to turn it off. Specifications same as listed here (PDF)
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