GF JRG 5195.025 Notice De Montage Et D'utilisation page 72

1. Close the untreated water addition (4) - with DN 40 / DN 50 the volume-controlled untreated water
addition (7) as well. Fully open bypass (5) and shut-off valve (6).
2. Determine water hardness at 1 LU (0.1 l / s), ideally close to the JRG bypass mixing valve.
3. Open the untreated water addition (4) by turning the spanner 270°.
4. Now determine water hardness once again.
5. If further adjustments are necessary, we recommend adjusting the untreated water addition (4)
in small steps (about 10° turn of the spanner each) and to subsequently re-examine water
hardness. Flush the line before each water hardness test. You are now done with the adjustment
of JRG bypass mixing valves DN 25 / DN 32. For JRG bypass mixing valves DN 40 / DN 50, perform
the additional steps below:
6. After setting water hardness, fully open the volume-controlled untreated water addition (7) using
a square socket spanner ( 6 mm).
7. If a limitation of the volume-controlled untreated water addition is desired, adjust in large steps
(about 180° turn of the spanner each). Check the selected settings with large volume flows and
adjust if necessary.
8. Finally, lock the setting with an open-end wrench
The example given is subject to various types of descaling devices and the water hardness
as provided by the local utility company. Adapt the settings and the setting procedure accor-
dingly. When opening the volume-controlled addition (7) with sizes DN 40 / DN 50, a deviation
of water hardness is to be expected due to the increased volume flow.
( 17 mm).
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