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4.4 Solar Ar ray Disconnect Switch in the Junction Box
PHOTO
Inside of junction box showing the
factory-installed wires that lead to the
controller.
The disconnect switch prevents the pump from
restarting if it has been stopped by the
POWER switch on the controller. It also
prevents activation by unauthorized personnel.
DISCONNECT SWITCH
The disconnect switch satisfies National
Electrical Code requirements for a safety
disconnect between the solar array and the
controller. During installation and maintenance,
switch off the disconnect switch to prevent
shock and arc burn hazard.
Note: Overload protection (fuses or circuit
breaker) is NOT required in the solar array
circuit.
Explanation:
1. Short circuit current from the solar array
can never reach the ampacity (maximum safe amps capacity) of the recommended wire.
2.
The ETAPUMP controller has internal overload protection.
CAUTION Loose connections are a common cause of failure. Pull each connection to confirm.
4.5 Junction Box (Controller Input) Wiring
System Diagram
For solar-direct systems, refer to the System Diagram at the end of this manual.
WARNING TEST THE VOLTAGE before connecting power to the controller. Voltage (open
circuit) must not exceed 90V. (Even in cloudy weather, the open circuit voltage will be near
maximum.)
WARNING Some thin-film modules (panels) may produce excessive voltage, especially when
they are new.
If the open circuit voltage exceeds 90V, DO NOT connect power to the controller. Contact
your supplier. (
SunCentric P
packaged systems do not use this type of module.)
WARNING Do not apply a direct connection or an amp meter b and – when the
controller is connected. A short circuit here will cause a strong discharge.
WARNING SOLAR-DIRECT systems only — Do not connect any electrical load or device to the
solar array if it is not part of the
SunCentric P
system.
Connection of a battery charger, active
tracker controller, electric fence charger, or other load simultaneously with
SunCentric
will “confuse” the
controller and prevent proper operation.
Ground connections
The two ground terminals in the junction box are bonded together and are also
bonded to the metallic enclosures of both the junction box and the controller. See Section 4.2
POWER IN
Ensure that the solar array DISCONNECT SWITCH (or battery fuse or circuit breaker) is
OFF. Connect the power from the solar array to the input terminals in the junction box. Observe polarity.
If your wires are not clearly /–, test them using a DC voltmeter or multitester.
Содержание SunCentric P
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