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Revised 7-12-19
American Faucet & Coatings Corporation
OPERATING SOLUTION FOR SIGMATHERM THERMOSTATIC MIXERS
In the event of an operating problem with a Sigma thermostatic mixer, review the following information. Make
sure hot and cold inlets are correctly connected to the marked hot and cold side of the mixer. Be sure there is
calibrated the mixer valve correctly. Check whether the screens are
clean of debris. The main operating problems, their causes and remedies are described below. If the problem is
caused by the mixer, return the replaceable mechanism or the complete mixer (industrial models) to the factory.
OPERATING DEFECTS
REASON
REMEDIES
- The water inlets are reversed.
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hot or cold water is delivered.
- The bimetal strip is not properly centered.
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- The distributing valve is not free.
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2 - The mixed water temperature follows the
- The control system is incorrectly calibrated.
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position of the graduated regulator but with a
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certain delay.
3 - The appliance does not deliver mixed water or
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only when the regulator is turned up all the way.
- One of the water inlets doesn’t work.
4 - The mixed water is delivered in spurts and the
- One of the water supplies doesn’t provide
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limited temperatures.
The bimetal strip is not properly centered.
5 - From time to time the appliance only delivers
- The distributing valve is not free.
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hot or cold water.
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6 - The water is always supplied at the same
- The bimetal strip does not move the distributing
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temperature hot or cold.
valve:
a) Because the distributing valve is not free.
b) Because the regulating screw does not act on
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the mechanism.
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7 - The temperature is irregular, especially when
- There are foreign particles beneath the
membrane.
- The membrane is damaged.
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- Pressure is too low.
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9
6
in the mixer.
USING 3/4", 1", 1-1/4", 1-1/2", AND 2" BI-METAL CARTRIDGES
FORM SIG 063
