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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



 
Auto-Chlor System, Inc. 
746 Poplar Avenue
Memphis, TN 38105 
United States 
901-579-2300
Visit this company's website

Facility : Memphis, TN


GLASSWASHING MACHINES

Glasswashing Machine
  UCR


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 Chemical Sanitizing
  A4 20x20  N/A   38.4   56   24   10   [1] [2] [3] [4] [5] [6] [7]
  A5 20x20  N/A   38.4   56   24   10   [1] [2] [3] [4] [5] [6] [7]
  A4IW 20x20  N/A   38.4   56   24   10   [1] [2] [3] [4] [5]
  A5IW 20x20  N/A   38.4   56   24   10   [1] [2] [3] [4] [5]
  AC 20x20  N/A   30.2   56   24   10   [1] [2] [3] [4] [5] [6] [7] [8] [9] [10]
  AC-HT 20x20  N/A   35.2   72   28   20   [1] [11] [12] [13]
  M4 20x20  N/A   41.3   56   24   10   [1] [2] [3] [4]
  U38 20x20  N/A   32.7   56   24   10   [1] [2] [3] [4]
  U34 20x20  N/A   30.2   56   24   10   [1] [2] [3] [4] [6] [7] [9] [10]
  U34PT-10 20x20  N/A   38.5   56   24   10   [1] [2] [3] [4] [6] [7] [8] [9]
  UHT 20x20  N/A   35.2   72   28   20   [1] [11] [12] [13]
 
[1] Recirculated pumped rinse minimum 50 ppm available chlorine.
[2] Total water demands 1.04 gal. per complete wash, rinse cycle at 120°F.
[3] Unit also accepted with shorter 72 sec. time cycle in which the following would apply:
    Dwell - 10 sec.
    Final rinse usage: 47.7 gph for straight, 46.7 gph for corner and 36.5 gph for front
    load @ 130ºF.
    Rinse - 17 sec.       
    Wash  - 45 sec.
[4] Unit also accepted with shorter 60 sec. time cycle in which the following would apply:
    Dwell - 10 sec.
    Final rinse usage: 57.1 gph for straight, 61.1 gph for corner, and 41.7 gph for front
    load @ 130°F.
    Rinse - 15 sec.
    Wash  - 35 sec.
[5] With or without suffix V to indicate a ventless system.
[6] Unit accepted with or without integrated booster heater.
[7] With or without suffix B to indicate an integrated booster heater.
[8] Also acceptable with or without drain tables.
[9] Unit accepted with or without sustainer heater.
[10] Models have been approved with a post sanitizing rinse.  Machine with post sanitizing
     rinse cycles will
     have a switch to turn the post sanitizing rinse on and off.  Sanitizer Concentration
     must be checked with
     post sanitizing rinse off.  Total water demand per cycle is 2.0 gal/cycle.  Cycle times
     are 56s wash, 10s
     dwell, 24s sanitize, 10s dwell, 20s fresh water final rinse.
[11] Total water demands 1.47 gal. per complete wash and rinse cycle at 120°F.  Lower water
     supply temperature may extend cycle time.
[12] Total water demands 1.47 gal. per complete wash and rinse cycle at 140°F. Lower water
     supply temperatures can be used, the internal booster heater will compensate for lower
     water supply temperatures by extending wash cycle to allow extra temperature rise
     required to meet sanitation requirements.
[13] Unit has been approved for both chemical sanitizing and hot water sanitizing.  Machines
     operating in chemical sanitizing mode will have a supply source for sanitizing chemical
     and operate at minimum wash and rinse temperatures of 120°F.  Recirculated pumped rinse
     minimum 50 ppm available chlorine.

Single Tank Door Double Rack Chemical Sanitizing
  D2 2*20x20  N/A   72.8   56   24   10   [1] [5] [6] [7] [14] [15] [16]
  D2CL 2*20x20  N/A   71.8   56   24   10   [1] [5] [6] [7] [14] [15] [16]
  D2CR 2*20x20  N/A   71.8   56   24   10   [1] [5] [6] [7] [14] [15] [16]
 
[1] Recirculated pumped rinse minimum 50 ppm available chlorine.
[5] With or without suffix V to indicate a ventless system.
[6] Unit accepted with or without integrated booster heater.
[7] With or without suffix B to indicate an integrated booster heater.
[14] Total water demands 1.94 gal. per complete wash, rinse cycle at 120°F.
[15] Unit also accepted with longer 108 sec. time cycle in which the following would apply:
     Dwell - 20 sec.
     Final rinse usage: 61.1 gph for straight 60.3 gph corner @ 120°F
     Rinse - 32 sec.
     Wash  - 56 sec.
[16] Unit also accepted with shorter 72 sec. time cycle in which the following would apply:
     Dwell - 12 sec.
     Final rinse usage: 90.2 gph for straight and 88.3 gph for corner @ 130°F.
     Rinse - 15 sec.
     Wash  - 45 sec.

Single Tank Door Hot Water Sanitizing (Dual Mode Sanitizing Machine)
  A6 20x20  4.1   49.7   35   10   0   [13] [17] [18]
  A6 20x20  4.1   47.6   35   10   0   [13] [17] [19]
  AC-HT 20x20  N/A   35.2   72   28   20   [12] [13] [17]
  UHT 20x20  N/A   35.2   72   28   20   [12] [13] [17]
 
[12] Total water demands 1.47 gal. per complete wash and rinse cycle at 140°F. Lower water
     supply temperatures can be used, the internal booster heater will compensate for lower
     water supply temperatures by extending wash cycle to allow extra temperature rise
     required to meet sanitation requirements.
[13] Unit has been approved for both chemical sanitizing and hot water sanitizing.  Machines
     operating in chemical sanitizing mode will have a supply source for sanitizing chemical
     and operate at minimum wash and rinse temperatures of 120°F.  Recirculated pumped rinse
     minimum 50 ppm available chlorine.
[17] Unit has been approved for both chemical sanitizing and hot water sanitizing.  When
     operating in hot water sanitizing mode no sanitizing chemical will be supplied and
     minimum wash temperature shall be 150°F and minimum rinse supply temp shall be 180°F.
[18] Unit is a straight load.
[19] Unit is a corner load.


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