Doyon WM45 Manuale di istruzioni per l'uso - Pagina 5
Sfoglia online o scarica il pdf Manuale di istruzioni per l'uso per Strumenti di misura Doyon WM45. Doyon WM45 13. Doyon wm45 water meter: operating instruction
Stampa la paginaWARNING: THE INTERVENTION OF A LICENSED INSTALLER IS NEEDED
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In case of hard water (with high lime scale content = hardness in French degrees higher than 25 – 30,
or 250 – 300ppm) it is necessary to employ an ion exchange water softener. This unit must be
calibrated so as to maintain a residual hardness ranging between 50 – 100ppm. The use of electronic
water softeners is not advised, since their efficacy has not been proved yet.
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Fix the doser-mixer on the wall at a height from the floor of 1350 – 1550mm, using the four wall
plugs supplied. The 90° wall plug hook is supplied to provide support for the water delivery outlet
elbow.
Do not place other machines below the DOSER-MIXER.
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Arrange the water inlet tubing as shown in the lay-out diagrams, figures 2-3-4-5, mounting the ball
gate valves (1) at the end of the pipes (black lever = cold on the right and red lever = warn on the left).
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With reference to the figure 4, it is advisable to use the pre-assembled group: Three way connection
kit, code 3801205.
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Connect ball gate valves to the doser-mixer by means of the "O" ring gasket type unions (2).
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Insert the delivery hose (12) into the housing.
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Connect the by-pass (13) to a drain by means of a copper pipe with 16mm external diameter.
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Connect the proper power supply (see equipment rating plate near the plug 7), monophase 50 or 60Hz,
using the supplied flying socket, fitted with a three core cable min. section 3x1mm². An external
switch is helpful.
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For the eventual pump remote control, use the supplied flying socket to connect the remote control
switch if the pump(s). The use of such a pump is necessary when one of the two inlet pressures in less
than 15 PSI, for example when using unpressurized water heaters or refrigerators.
NOTICE: in the case of water chiller equipped with a surge tank with pressure switch, this must
be by-passed and the pump must be controlled directly by the Doser, through a power relay.
The plug on the device has the following wiring diagram (clean control):
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