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NSF/ANSI 3
Commercial Warewashing Equipment

Racks per Hour / Dishes per Hour / Water Consumption Calculations

For informational purposes, the estimated racks per hour or dishes per hour for NSF/ANSI 3 Certified dishwashers can be calculated as follows:

Racks per Hour for Stationary Rack Dishwashers = 3600(NR) / TC

Racks per Hour for Rack Conveyor Dishwashers = (CS)(60) / RL

Dishes per Hour for Rackless Conveyor Dishwashers = (120)(CS)(CW) / PD

Water Consumption (gallons per hour) for Stationary Rack Dishwashers = (GPC)(RPH)

Water Consumption (gallons per hour) for Conveyor Dishwashers = (GPM)(60)

Where: CS = Conveyor speed measured in feet per minute
              CW = Conveyor width measured in inches
              GPC = Gallons per cycle
              GPM = Gallons per minute
              NR = Number of racks the dishwasher is designed to hold per cycle
              PD = Distance between pegs measured in inches, center to center of the peg, in the direction of conveyor travel
              RL = Length of the rack measured in feet
              RPH = Racks per hour
              TC = Total cycle time measured in seconds

The total cycle time includes wash, rinse, dwell, and load times. Load times will vary depending on the type of dishwasher. Estimated load times commonly used for specific types of dishwashers are as follows:
door type (straight thru) - 5 seconds
door type (corner) - 7 seconds
hood type - 8 seconds
front opening type - 30 seconds



 
Moyer Diebel Limited 
2674 North Service Road
Jordan Station, ON L0R1S0 
Canada 
905-562-4195

Facility : Winston-Salem, NC


CONVEYOR DISHWASHING MACHINES
      Final Rinse    
      (20 psi) Conveyor Speed  
  Model Conveyor Flow Usage (Max.) Footnotes
  Number Width gpm gph (ft/min.)  

Single Tank Rack Conveyor, Hot Water Sanitizing[1]
  MD44 20x20  2.17   130   6.1   
  MD66 20x20  2.17   130   6.1   
 
[1] Unit may be equipped with an optional integral booster.  This booster should be sized to
    supply the required heat rise to provide the proper final rinse operating temperature of
    180°F to 195°F.


STATIONARY RACK DISHWASHING MACHINES
      Final Rinse    
      (20 psi) Operating Time  
  Model Rack Size Flow Usage (seconds) Footnotes
  Number Width gpm gph Wash Rinse Dwell  

Single Tank Door, Hot Water Sanitizing
  MD2000 20x20  4.4   49.5   40   12   8   [1] [2]
  MDHH 20x20  5.4   44.4   44   10   14   [1] [2] [3] [4]
  MDHHB 20x20  5.4   44.4   44   10   14   [1] [2] [4] [5]
  MDHHD 20x20  5.1   46.8   35   10   15   [1] [6] [7] [8] [9]
 
[1] Also available for corner placement.
[2] Total water consumption 0.9 gallons/cycle.
[3] Machine to be connected to customer supplied 180°F water for final rinse.
[4] This unit has been tested and Certified as a combination Dishwashing/Pot, Pan & Utensil
    Washing Machine. Please reference this model's Listing under Stationary Rack Pot, Pan
    and Utensil Washing Machines for this model's specifications for that mode of operation.
[5] Machine with built in booster heater.
[6] Unit may be equipped with an optional integral booster. This booster should be sized to
    provide the proper final rinse operating temperature of 180°F to 195°F.
[7] Unit may be equipped with an optional direct vent system.
[8] Unit may be equipped with an optional condensate removal system.
[9] Total water consumption 0.85 gallons/cycle.


STATIONARY RACK POT, PAN, AND UTENSIL WASHING MACHINES
      Final Rinse    
      (20 psi) Operating Time  
  Model Rack Size Flow Usage (seconds) Footnotes
  Number Width gpm gph Wash Rinse Dwell  

Single Tank Stationary Rack, Hot Water Sanitizing
  MDHH 20x20  6.2   25.5   156   13   11   [1] [2] [3] [4]
  MDHHB 20x20  6.2   25.5   156   13   11   [1] [2] [4] [5]
  MDHHD 20x20  4.7   16.5   210   15   13   [1] [2] [5] [6]
 
[1] This unit has been tested and Certified as a combination Dishwashing/Pot, Pan & Utensil
    Washing Machine. Please reference this model's Listing under Stationary Rack Dishwashing
    Machines for this model's specifications for that mode of operation.
[2] Also available for corner placement.
[3] Machine to be connected to customer supplied 180° F water for final rinse.
[4] Total water consumption 1.34 gallons/cycle.
[5] Machine with built in booster heater.
[6] Total water consumption 1.18 gallons/cycle.


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