AMS-MM+20 Owners Manual

 Automatic Misting System AMS-MM+20

Operation Manual

Thank you for your recent purchase of an Automatic Misting System manufactured by Mosquito Control Equipment. This manual will guide you through the setup, operation and maintenance of your system.


General safety considerations

  • Misting Concentrates: There are a variety of concentrated repellents and insecticides for use in Automatic misting systems.  Only use concentrates labeled for use in Automatic Misting systems. Read all labels and Safety Data Sheets carefully, following all instructions regarding application, dilution rates, storage and disposal. Some misting concentrates may be toxic to fish or burn plants. When locating nozzles, prevent mist from drifting off property. The insecticide label should be attached to the drum in a weatherproof pouch.
  • Once the system has been assembled and programmed, the drum clamp ring and control box should be padlocked to prevent access by children. 
  • Electrical Shock Hazard: Disconnect the power source before servicing. Failure to do so could result in serious injury or death.
  • The System should be located in a clean, level, covered area, free from flooding and runoff, near a GFCI (ground fault circuit interrupt) protected outlet rated for 15 Amps minimum. Extension cords should not be used. 

Operation Notes

 The Program Clock

  • Setting the Clock: Turn the Minute hand clockwise until the time of day (AM or PM) on the outer dial is aligned with the triangular marker on the inner dial. 
  • Programming: Pull a white captive tripper outward at each time misting is desired. Each tab on the Program Clock represents fifteen minuets. Clocks initiate spray cycles by passing pulled pins along the clock face. Clocks are mechanical devices; they contain moving parts that can be damaged by excessive dust and debris. Please keep the enclosure door closed and use system covers when needed. 
  • See FAQs or System Page for Digital Clock Programing

 Mist time adjustment

  • The misting time may be set between 5 and 180 seconds by adjusting the knob to the right of the Program Clock

Auto / Off / Test Switch

  • Test : When in the Test position the pump will run continuously. There are several scenarios where this is useful. See Initial setup and Winterizing. 
  • Off : When in the Off position the Clock’s program will not be actuated nor will the remote control initiate mist cycles. The Clock is powered and will keep time.
  • Auto: When in the Auto position the Clock’s program will be actuated and the remote control will initiate Mist cycles on demand

Tank Empty Light

  • The Tank Empty light illuminates when the tank level is below the minimum operating range. Note: When the tank level is below minimum operating range the system will shut down; it will not be operable until the tank is refilled.  

Circuit breaker

  • The circuit breaker will pop up when a short circuit or overload is detected. Push to reset. If it pops again after being reset unplug the system and call a service technician

Remote Control transmitter:

  • A misting cycle may be initiated on demand by pushing the red button on the remote control transmitter. The Auto / Off / Test Selector Switch must be in the Auto position. Note: if the program clock is at a white captive tripper, the remote will not work until it has passed the tripper

Initial setup: Prior to use, the pump will need to be primed. Attach a short piece of ¼” tubing with NO nozzle to the OUT port and direct the tube to an acceptable spray out location, turn the system to Test until water is coming out, let run for 5 to 8 seconds. For winterizing each year you will need to drain out the pump to keep it from freezing (damage to pump caused by failure to winterize is not covered by warranty). 

Mount nozzles 8 to 10’ apart, connect unions with tubing ensuring good connections by pressing firmly until tubing “seats” into place. Connect 1/4″ supply line, from nozzle circuit, to the 1/4″ output, fill your reservoir about 50% with water only and plug in system. At the control box turn the toggle switch to “Test”; Let pressure build. Walk the Nozzle circuit checking for leaks, and spray pattern.

Tank Filter Cleaning: Each time you refill the drum with misting concentrate, rinse the filter to remove any excess residue. Replace the tank filter once corrosion and wear is visible on the mesh as a clogged filter can damage the pump and motor assembly. It is recommended to replace the filter once a year

Winterizing: Winterizing your Mosquito Misting system is required if you live in a climate where the temperature can drop below freezing. First, flush the lines and nozzles with clean water by allowing the pump to run continuously for about 5 minutes. Second, disconnect the output line going to the nozzles. If the Tank is the lowest point in the system the line should drain by gravity. If it is not, find the low spot(s) in the system and disconnect the line and allow it to drain. If you have an air compressor connect it to the output line and remove the furthest nozzle and blow out the water in the line. Finally, remove the intake line, connect a short piece of 1/4″ tubing to the output fitting and place the other end in the tank (This is so any fluid in the pump will be deposited in the tank and not all over you). Run the pump 10-15 seconds to clear any solution that may be in the pump. If your tank is outdoors, replace the protective cover to keep your system clean and dry. If you have prolonged periods of below freezing temperatures, you may want to bring the pump indoors for the winter.


Misting Concentrate Dilution: Most misting concentrate packaging and dilution rates are based on 55 gallon systems. With The AMS-MM+20 only use 22 Oz of concentrate for each 20 gallon fill; using more than the recommended amount will damage the pump and void its warranty

Warranty: Mosquito Control Equipment One Year Limited Warranty 

Products covered: The following Mosquito Misting system products manufactured by Mosquito Control Equipment are covered by this limited warranty: AMS-MM, AMS-MM+20, AMS-S1M, AMS-A, and AMS-D

How long is the warranty?: The warranty begins on the date of purchase and lasts for one year.

What is covered: This Limited Warranty covers any defects in material or workmanship under normal use during the Warranty Period.

What is not covered

1)Filters. 2) Damage due to misuse, abuse, neglect, theft, vandalism, unauthorized repairs or attempted repairs, natural disasters, acts of God or terrorism. 3) Damage in shipping to or from the manufacturer. 4) Shipping and packaging of a system returned for a warranty claim. 5) Any special, indirect, exemplary, incidental or consequential damages arising out of or in connection with the product, any other materials or services furnished hereunder, to the greatest extent allowed by applicable law.

How to make a Warranty claim

Please contact the factory by email (, telephone (800-805-5049) or mail and provide your name, ship to address, telephone #, email address, serial #, date of purchase and a description of the product defect.  A warranty technician will be assigned to your case and contact you to diagnose and troubleshoot the problem. If the product must be sent to a factory service center for repair they will issue you a return authorization # and provide you shipping instructions. Please do not return products to the factory without a return authorization number as they will be rejected, returned to sender freight collect. This warranty is the sole exclusive remedy regarding any potential defects of the product and is limited to the repair or replacement of the product purchased.

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