MD Central Vacuum Manuals and Help

Central vacuum systems rarely come with a manual covering everything because each of the three components that make up a system can be from independent manufacturers. The main suction unit can be from a manufacturer in California, and the hose and tool set may be a dealer's favorite from a distribution center. Below you will find basic help for the three components: 1) the central vacuum unit, 2) the pipe, wiring and inlets, and 3) the hose and accessories.

+ Central Vacuum Unit (Located in the basement or garage)

Troubleshooting Chart & Solutions

Use this Troubleshooting Chart to find out why the vacuum is not working properly and how it can be fixed.

Maintenance Information Basics

Taking care of a central vacuum unit is quite easy. The only required maintenance is changing or cleaning the filter and dumping the debris. If the top doesn't lift off to access a filter then twist or unlatch the base to perform the maintenance. There is nothing to lube or oil on the central vacuum system including the motor. For more maintenance tips, visit the motor page for your brand in the yellow bar below.

Owner's Manual for MD SilentMaster, ModernDay, Flo-Master, AirMaster

Owner's Manual covers the power unit only, not the pipes, hoses or accessories. For basic help with other brands use the yellow bar below.

Wiring Diagrams for Relay / Transformer Models

Primarily for MD SilentMaster, ModernDay, Flo-Master, AirMaster. Corresponding components maybe wired the same way in other systems.

Circuit Board Wiring

Click the circuit board that goes in your model to get connection labeling. To find the correct board, match the board specs to vacuum specs.

+ Central Vacuum Pipe, Wiring and Inlets (99.9% of all central vacuums have the same pipe, wiring and inlets installed, no matter the brand)

Troubleshooting Chart & Solutions

Use this Troubleshooting Chart to find issues with the integrated pipe, the wiring to each inlet, or the inlets on the wall.

Maintenance Information Basics

Taking care of a central vacuum pipe is easy. It rarely, if ever, requires maintenance. However, there is a way to clean out and deodorize the hose and pipes using Free Flow Central Vacuum Maintenance Sheets. Maintaining the inlet valves is done as needed. Parts are not sold separately so if a door breaks replace the entire inlet valve. Here is how to fix air leaking inlets.

Installation Manuals

Looking to install or modify a central vacuum system's pipe, wire and inlet location? Use the Installation Manuals for help with any system.

+ Central Vacuum Hose and Accessories

Maintenance Information Basics

There is nothing to lube or oil on the vacuum cleaner, but the fibers wrapped around the brush roll of the vacuum cleaner head should be cut out and removed on a regular basis. For vacuum hose maintenance, the most important tip is to disconnect the hose from the wands and hang it up or lay it on the ground. Keeping it connected puts pressure on the hose as it bends down, which may cause a tear over time.

Owner's Manual

Specific Manuals are available here for:

Ace (Kenmore Whisper Belt, Panasonic, Nutone CT650 & CT600, CT20DX, CT18DX, CT16DX, CT14DX)
Stealth (Lindhaus PB14-E)
TurboCat Turbine 7160, 7161, 7210 (sold under many names)
TurboCat Zoom 8429, EX, 5, V (sold under many names)
RugRat Turbine 6970, 6971, 6972 (same manual as TurboCat)