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7.3 SPLICING THE WIRES
Properly splicing the pump and sensor wires is a key step during the solar pump installation process.
The recommended process includes the use adhesive-filled heat shrink tubing. After stripping the
ends of the wires, use the provided crimp connectors to merge the two ends. Place both ends into the
heat shrink tubing—and with a standard hot hair heat gun or flame torch—work from the middle
outward to the edges. Adhesive should be oozing from each end of the shrink tubing, ensuring a
proper seal has been made. Be sure to mark or write down the matching cables connections (Black >>
Green; Brown >> Red; etc.). Pull lightly on each corresponding cable after crimping them together to
verify that they are both secure and making a good connection.
ATTENTION: Use caution while heating the shrink tubing. If care is not used, injury may
be sustained by the flame or heated adhesive leaking from the ends. Remember to keep
the heat source moving to avoid burning the tubing or wire insulation. A double
watertight seal must be provided using properly engineered materials to prevent water
from seeping into the pump cable—and possible into the motor. Failure to do so will VOID THE
WARRANTY. See Figure 7-1Wire Splice Diagram.
7.4 SAFETY ROPE
It is recommended that the safety rope be polypropylene or polyethylene water well safety rope. It
can be purchased from your Authorized SunRotor
®
Dealer or local pump supply store. If
unavailable, use polypropylene marine rope rated for at least 1000 pounds (450 kg). Stainless steel
cable may be used, if preferred.
ATTENTION: DO NOT use nylon rope in water. Nylon absorbs water and softens after 5 to
10 years. Failure may cause damage or loss of equipment. Polypropylene is the accepted
material for water well rope.
7.5 LOW WATER SENSOR
Low water sensors are placed above the pump inside the well. The sensor sends a signal to the
controller that stops the pump when the well’s water level drops below the sensor. This ensures the
pump motor isn’t damaged if the well’s recovery rate is less than the flow rate of the pump.
ATTENTION: It is HIGHLY recommended that all SunRotor
®
solar pumps are installed with
this sensor. It is an extremely economical and effective method of protecting equipment.
Damage to the equipment from pumping dry is NOT covered under your warranty.
Install the low water sensor 6-18 inches above the pump. Secure it to the drop pipe by using cable
ties around the body of the device. Wrap both the low water sensor body and cable ties with high
quality, waterproof electrical tape. PLEASE NOTE: there are holes at or on the top of the low water
sensor; do NOT cover these holes when securing the device to the drop pipe.
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