Hitachi YUTAKI Series Installatie- En Bedieningshandleiding pagina 14
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HYDRAULIC CIRCUIT
1G" Water OUT
?
N O T E
Check periodically:
Water flow and pressure
•
•
Water leakages
Fixing points tightening
•
9.2 MINIMUM WATER VOLUME DESCRIPTION
Necessity of water in system
The following problems should occur when the quantity of water in the forced circulation system (1) on water side is insufficient.
1 WEH frequently ON/OFF cycles affecting YUTAKI performance.
2 Low temperature in water circulation system at defrosting, which should cause an alarm (freeze protection).
3 LWPS or Cut-Out thermostat activation due to low water pressure (< 1 bar) or due to excessive high water temperature inside
WEH.
?
N O T E
Calculate and ensure that the water volume in the system is enough (see YUTAKI product manual for recommendations)
9.3 WATER CONTROL
!
C A U T I O N
•
When it is used industrial water inside hydraulic system, it rarely causes deposits of scales or other foreign substances on the equipment. However,
well water or river water should in most cases contain suspended solid matter, organic matter, and scales in great quantities. Therefore, such water
should be subjected to filtration or to a softening treatment with chemicals before application as chilled water.
•
It is also necessary to analyse the quality of water by checking pH, electrical conductivity, ammonia ion content, sulphur content, and others. Should
the results of the analysis be not good, the use of industrial water would be recommended.
•
(see YUTAKI product manual for recommendations).
6
PMML0199A rev.4 - 12/2016
1/4G"
Inlet and outlet connection pipes must be 1G"
It must be kept the water flow direction indicated in previous drawing
1G"
Water IN
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Probleemoplossen
