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I.  

Introduction 

 
Thank you for purchasing the Dropmaster DM12. The Dropmaster was originally designed to 
remove excess water and odor from fire sprinkler systems prior to repairs and change outs. 
However, the Dropmaster DM12 can be used on numerous other applications such as boilers, 
heat exchangers, air handlers, chillers, and a variety of closed loop piping systems. This manual 
mostly details the Dropmaster being used on fire sprinkler systems; however the same basic 
principles can be applied to the aforementioned applications. 

 

The Dropmaster DM12 is a rugged, durable tool built with components rated for continuous 
duty use. In certain applications, the Dropmaster is capable of 24/7 operation. By following the 
maintenance guidelines in this manual, your Dropmaster should provide years of service and 
significant return on investment. 
 
Every Dropmaster goes through a rigorous series of quality control tests in our manufacturing 
facility. Our patented fail-safe vacuum system is set by our highly trained technicians to 10” Hg 
to ensure the system will not damage grooved couplers. The Dropmaster is built on a custom 
designed hand cart, with 10 inch pneumatic tires. This design allows the Dropmaster to fit 
easily through most standard doorways and maneuver around job sites. Each Dropmaster comes 
with 20-foot-long durable, high quality intake and discharge hoses. Replacement and custom 
length hoses, as well as replacement parts, can be order directly from Gecco Inc. 
 
The Dropmaster DM12 has several safety features you should be aware of. The 3/4 horsepower, 
high torque – low amp motor has manual

 

thermal overload protection. Additionally, each unit is 

supplied with a 20’ GFI protected, 12-gauge power cord. 

Extension cords should never be 

used with the Dropmaster.

 The vacuum pump and drive motor feature metal safety guards that 

must be in place during operation. The Dropmaster DM12 has a newly redesigned noise 
suppression muffler system which has been factory tested below 80db.  
 
Your Dropmaster DM12 should always be transported securely, in the upright position. An 
optional hitch mounted carrier can be purchased for the Dropmaster. The hitch mounted carrier 
makes transporting the unit easier and saves valuable space in your service vehicle.  
 
The Dropmaster system works by drawing a regulated 10” Hg vacuum on fire sprinkler systems 
and process piping prior to making repairs and change outs. By eliminating excess water and 
odor, repairs and change outs can be made in a neat, clean and timely manner. By eliminating 
the need to use buckets and tarps, decreasing set up and clean up times, the Dropmaster can 
significantly reduce job time and increase profit.  Your Dropmaster DM12 is safe to use with 
most antifreeze solutions and can be used for winterization of various piping systems.  
 

The team at Dropmaster prides themselves on their products and world class customer 
service. Please read this manual thoroughly before operating your new Dropmaster 
DM12. If you have questions or concerns regarding our product, please contact us and we 
will gladly direct you through the initial set up, use, and maintenance. 

Summary of Contents for Dropmaster DM12

Page 1: ...OPERATION MANUAL...

Page 2: ...ntents I Introduction page 2 II Safety Instructions page 3 III Operations Procedures page 4 IV Water Calculations Sheet page 5 V Troubleshooting page 6 VI Maintenance page 7 VII Model Information opti...

Page 3: ...rom Gecco Inc The Dropmaster DM12 has several safety features you should be aware of The 3 4 horsepower high torque low amp motor has manual thermal overload protection Additionally each unit is suppl...

Page 4: ...n contact with these components 7 Do not touch moving parts while the Dropmaster is in service 8 Technician operating the Dropmaster should utilize eye and hearing protection at all times 9 Unit shoul...

Page 5: ...will be connected to 5 Connect the suction side of the Dropmaster with suction valve closed to your choice of outlet and connect the discharge hose to a suitable drain 6 Turn unit on and open suction...

Page 6: ...ng Dropmaster in service 1 Gallon of water 8 344 lbs Pressure Vacuum 1 psi 2 036 inches H G 5 psi 10 18 inches H G 10 psi 20 36 inches H G 15 psi 30 54 inches H G Water in Pipes By Size Pipe Size Sche...

Page 7: ...ring and barrel lid 3 IF LOW OR NO VACUUM AT END OF SUCTION HOSE Clean out 1 wye strainer remove 3 8 plug and then remove large bushing and pull out strainer basket Check for any blockages 4 IF GUAGE...

Page 8: ...h and clean storage tank after daily use Unit should be stored indoors in a clean dry location Check and clean strainer Remove the strainer basket and it is free of debris or sludge Replace the basket...

Page 9: ...ter DM12 Features Deisgned and built for 24 7 operation all of the Dropmaster s components are rated for continuous duty Powered by a hp high torque low amp motor 1 3 hp discharge pump capable of pump...

Page 10: ...ent of a defective Dropmaster or component thereof shall be at the Original Purchaser s sole risk The motor and compressor are warranted One Year 1 from the date of delivery from the manufacturer Owne...

Page 11: ...essly authorized in writing by GECCO LIMITATION OF LIABILITY To the extent allowable under law GECCO s liability for consequential and incidental damages is expressly disclaimed GECCO s liability in a...

Page 12: ...Maintenance Manual For Vapor Oil Pumps Model DM12 IMPORTANT READ BEFORE INSTALLATION OF THIS UNIT 11...

Page 13: ...or low voltage service VAPOR OIL PUMPS Use a 10W 30 Oil for all Conde Vapor Oil Pumps When starting new vapor oil pumps fill oil reservoir above the fittings in which the wicks are inserted This will...

Page 14: ...cted away from the motor Be careful to contain any mist or spray 3 Use kerosene or diesel fuel fluid for flushing process While the pump is running under vacuum simply insert the tube into the cleanin...

Page 15: ...14...

Page 16: ...pump The pump must be assembled in the same position This will align the rotor with the endplates and housing 4 Install the slinger over shaft green disk 5 Press bearing on the shaft using a bearing i...

Page 17: ...16...

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