DHR-Milking machine wash program

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If a new wash program is recommended use the guide below to determine a suitable wash program.  If the wash program is automated ensure that the selected wash program (in the guide below) is available.

Use water quality & then hot water availability to select the most suitable wash program(s).  The numbers refer to the wash programs in the list below.

Water quality Hot water availability
Sufficient* Limited None
Soft 1 3,4,5,6 9
Hard 2 7 8


* Sufficient means, enough hot water to satisfy the day’s volume requirement for the pre-rinse, wash, and final rinse cycles. To estimate water quantity requirements, see the section titled Water quantity.
Water hardness affects the effectiveness of alkaline detergents. Some detergents cannot be used in hard water. The presence of iron also has a detrimental effect: the higher the level of iron, the higher the alkali dose rate must be. Hence water hardness must be the first consideration.

Water that is extremely hard (>700 ppm, CaCO3, see hardness table), or has high levels of iron (> 3.0 ppm) can be considered to be of poor quality for cleaning purposes, and as such should be allocated to an acid-dominant wash program.

Wash Cleaning Pre-rinse Wash Final Rinse
Program Session Temp Description Frequency Temp Description Frequency Temp Description Frequency
1 AM Warm Water 7 days Hot Alkali detergent 7 days Hot Water 7 days
PM Warm Water 7 days Hot Acid detergent 7 days Hot Water 7 days
2 AM Warm Water 5 days Hot Acid detergent 5 days Hot Water 2 days
AM Warm Water 2 days Hot Alkali detergent 2 days Hot Water 5 days
PM Warm Water 7 days Hot Acid detergent 7 days Hot Water 7 days
3 AM Warm Water 7 days Hot Alkali detergent 7 days Cold Acid sanitiser 7 days
PM Warm Water 7 days Hot Acid detergent 7 days Cold Acid sanitiser 7 days
4 AM Warm Water 7 days Hot Alkali detergent 7 days Hot Water 7 days
PM Warm Water 7 days Warm Acid detergent & sanitiser 7 days
5 AM Warm Water 7 days Hot Alkali detergent 7 days Hot Water 7 days
PM Warm Water 7 days Cold Acid detergent & sanitiser 7 days
6 AM Warm Water 7 days Warm Alkali detergent & sanitiser 7 days
PM Warm Water 7 days Cold Acid detergent & sanitiser 7 days
7 AM Warm Water 5 days Hot Acid detergent & sanitiser 5 days
AM Warm Water 2 days Hot Alkali detergent 2 days Hot Water 2 days
PM Warm Water 7 days Cold Acid detergent & sanitiser 7 days
8 AM Cold Water 7 days Cold Acid detergent & sanitiser 5 days
AM Cold Water 7 days Cold Alkali detergent & sanitiser 2 days
PM Cold Water 7 days Cold Acid detergent & sanitiser 7 days
9 AM Cold Water 7 days Cold Alkali detergent & sanitiser 7 days
PM Cold Water 7 days Cold Acid detergent & sanitiser 7 days