MARLO MATD 9500 XT, Руководство пользователя

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4.3 WIRING
•
— Risk of electrical shock. This pump is supplied with a
three-prong grounding type power plug. To reduce risk of electric shock,
connect only to a properly grounded, grounding type receptacle.
•
The metering pump should be wired to an electrical source, which conforms
to those on the pump data label. Applying higher voltage than the pump is
rated for will damage the internal circuit.
•
In the electronic circuit of the control unit, measures for surge voltage are
made by means of surge absorbing elements and high voltage semiconduc-
tors. Nevertheless, excessive surge voltage may cause failure in some areas.
Therefore, the receptacle should not be used in common with heavy electrical
equipment, which generates high voltage. If this is unavoidable however,
measures should be taken by (a) the installation of a surge-absorbing element
(varistor of min. surge resistance 2000A) to the power supply connection of
the pump, or (b) the installation of a noise suppression transformer.
•
Signal input to the external pulse signal input terminals ([EXTERNAL], [STOP])
must be a no-voltage signal from relay-contacts etc. and the input of other
signals is prohibited. (In the case of relay contacts, 100 ohms or below when
ON and 1-meg ohms or above when OFF). The pulse duration of the input signal
must be 10 milliseconds or over and the frequency of the input signal must not
exceed 125 times per minute. Signal cord is provided with the pump.
4.4 WELL PUMP SYSTEM INSTALLATION
Ensure that the metering pump voltage matches
the voltage of the well pump. Typical well pump
electrical circuits are shown in Figure 8. All
electric wiring should be installed in accordance
to local codes by a licensed electrician.
Install the backpressure/injection (Figure 7) on
the discharge side of the metering pump into a tee
which is installed into the water line going to the
pressure tank.
Pumps carrying the or "ETL Sanitation" (tested to NSF Standard-50) marks are listed for
swimming pools, spas and hot tubs, and when proper materials are selected, are capable
of handling but not linited to the following chemical solutions:
12% ALUMINUM SULPHATE, 5% SODIUM CARBONATE,
2% CALCIUM HYPOCHLORITE, 10% SODIUM HYDROXIDE,
12.5% SODIUM HYPOCHLORITE, 10% HYDROCHLORIC ACID
FIGURE 7
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• The input signal must be in the form of closure of a mechanical relay or
other mechanical switching device, or solid-state relay or other solid-
state switching device. Voltage signals are prohibited. The switching
resistance of either mechanical or solid-state devices must be 100 ohms
or below when ON and 1 megohm or above when OFF. If any type of
solid-state device is employed, it must be installed with the proper
polarity, if required for the device; and leakage current must not exceed
200 microamperes to prevent false triggering in the OFF state.
The stop function is commonly used in conjunction with a tank float switch.
The float switch contacts are normally open but when the tank level falls past
a certain point the contacts close and the pump stops.
5.5.2 EXTERNAL PACING FUNCTION (E Plus, A Plus, C Plus & C only)
The pump's stroke rate can be controlled by an external signal input. When
the input signal line is connected and the EXTERNAL /OFF /MANUAL
switch is in the external position and a contact signal is input to the terminal
marked
, the pump makes one discharge stroke.
Operation of more than one pump from the same contact closure
will damage the pump circuits. When such operation is required,
the pump circuits must be electrically isolated from one another
by means of a multicontact control relay or similar means.
5.5 OPERATION BY EXTERNAL INPUT SIGNALS (Options):
The pump can be controlled by three types of input signals. All are fully isolated
from AC input and from earth ground. The input socket connections are located
at the bottom of the control panel face and the signal cords are provided with the
pump. Remove rubber plugs to access plug sockets.
5.5.1 STOP FUNCTION (E Plus, A Plus, C Plus & C only)
Operation of the pump can be stopped by an external signal input. When the
external signal is input to the terminal marked which is provided at the
bottom of the control panel, the lamp (red) lights up and operation of the
pump is stopped. The stop function overrides both manual settings and
external input.
Operation of more than one pump from the same contact closure
will damage the pump circuits. When such operation is required,
the pump circuits must be electrically isolated from one another
by means of a multicontact control relay or similar means.