Sabroe Ammonia water test Installation guide

Brand: Sabroe

Model: Ammonia water test

Type: Installation guide

011031

19 Oct 01, Rev 1

CAF/jmd

Ammonia water test

Customer: Date:

Plant: Order no:

Supervisor:

Procedure:

 Use only approved test tubes part no 1226.031, gloves and mask must be used when draining refrigerant.

 The sample must be taken from the evaporator side. That is, from the separator, pump forward, or oil draining on the

evaporator, after the oil has been drained.

Sampling from the receiver is unsuitable, as the water content is several times higher on the evaporator side. The plant

must be running in normal operation when the sample is taken. There must be no ice or condensation at the drain valve

as the sample will then show too high water content.

 The test tube is filled with 50 ml ammonia and placed securely for evaporation to prevent unauthorised persons getting

injured.

No water/moisture must access the test tube during evaporation as ammonia easily absorbs moisture and makes the test

misleading.

Evaporation takes 3 or 4 hours and should not be accelerated by increased heat induction to the test tube, as excessive

boiling of the ammonia sample will generate ammonia vapours, which will entrain part of the water content from the

sample.

Increase of heat induction by means of a piece of welding rod placed in the test tube is, however, possible.

 After drainage the ammonia colour and clarity are observed to estimate impurity and decomposition content.

 After evaporation the glass sides are checked for deposits. Brown deposits indicate decomposition products in the

ammonia refrigerant.

 After evaporation the water content in ml is read and the water content determined.

Water content is calculated according to the following formula:

Readings of water content in ml x water density in g / cm3

Sample amount inml x ammonia density in g / cm3 x100 % water content

Example: 0.3 ml water reading after evaporation: water.0.92%100x

cm/g650.xml50

cm/g1.0xml0.3 

Rule-of-thumb: Readings of water content in ml x 3 = % water content.

011031

Water sample taken from:

Before evaporation, amount: 50 ml After evaporation, amount: ml

Clarity

Colour

Clarity

Colour

 Clear

 Muddy

 Colourless

 Light yellow

 Yellow

 Light brown

 Brown

 Dark

 Clear

 Muddy

 Colourless

 Light yellow

 Yellow

 Light brown

 Brown

 Dark

Result, water content = ______________%

 Result under 0.5% water content is satisfactory.

 Result over 1.0% water content is not acceptable as it results in increased energy consumption, increased wear, possible

break down, corrosion and impurities/decomposition products.

Notes:

Johnson Controls Denmark, After-Market Service

Sabroe Ammonia water test Installation guide

Brand: Sabroe

Model: Ammonia water test

Type: Installation guide

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Sabroe Ammonia water test Installation guide

Sabroe Ammonia water test Installation guide

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