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Stairs ST SERIES Installation And Operating Instructions Manual

4”/6’’ submersible deep well pump
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Submersible
Deep Well Pump
4"/6''
ST SERIES
INSTALLATION AND
OPERATING INSTRUCTIONS
These Instructions must be delivered with the pump to the operator.
WARNING: Failure to follow these instructions and comply with all applicable codes
may cause serious bodily injury and/or property damage.

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Summary of Contents for Stairs ST SERIES

  • Page 1 Submersible Deep Well Pump 4”/6’’ ST SERIES INSTALLATION AND OPERATING INSTRUCTIONS These Instructions must be delivered with the pump to the operator. WARNING: Failure to follow these instructions and comply with all applicable codes may cause serious bodily injury and/or property damage.
  • Page 3 Installation & Operating Instructions It is important that all submersible deep well pumps be installed by experienced persons and that all electrical connections comply with the relevant electrical supply authority requirements. The electrical connections and checks must be made by a qualified electrician and comply with applicable local standards.

  • Page 4: Installation

    NOTE: Before coupling pump to motor ensure pump and motor models are as specified. For ease of transportation and to minimise potential transport damage, Stairs 4” submersible deep well pumps are supplied in component form, ie. motor and liquid end boxed separately. For correct coupling, proceed as follows: Remove cable guard after removing the lock screws.
  • Page 5 4. Check Valve All Stairs submersible deep well pumps are supplied with a check valve, and no additional check valves are required for open discharge conditions up to a maximum of 80 meters head. For installations greater than 80 meters head, or when used as a pressure system, it is recommended that an additional check valve be fitted approximately no more than 60 meters vertically above the pump and every 60 meters vertically thereafter.

  • Page 6: Typical Submersible Installation

    and damage caused may effect warranty cover. Typical Submersible Installation A. PUMP CONNECTED FOR MANUAL OPERATION. B. PUMP INSTALLED AS AN AUTOMATIC PRESSURE SYSTEM INCORPORATING PRESSURE TANK AND PRESSURE SWITCH. WARNING: Failure to use correct starting equipment and overloads may damage your submersible motor.
  • Page 7 ALL THREE PHASE MOTORS MUST BE CONNECTED WITH APPROVED OVERLOADS. 6. Electrical Connection All wiring should conform to the requirements of local and national electrical codes. If in doubt, contact your electricity supply authority. Cables should be insulated and sheath type, conforming to AS3100 and rated for continuous immersion in water.
  • Page 8 Three Phase Connection Three phase models must be wired with a contactor with approved overloads set correctly. Stairs recommend the use of overloads which also have the ability to detect “single phasing” or “dropped phase” conditions in the power supply.

  • Page 9: Operation And Maintenance

    While Stairs submersible pumps do not require regular maintenance, it is a good practice to monitor the conditions and performance of the pump and motor. This diagnosis may be carried out by checking the maximum pressure (shut valve for a very short period) generated by the pump, and by checking the amperage draw of the motor at standard duty flow rate.
  • Page 10 Pump service chart The following chart offers a means of diagnosing general pump problems.
  • Page 12 STAIRS INDUSTRIAL CO., LTD. No. 3-8, Sanchial Tsun, Lutsao Hsiang Chiai Hsien, Taiwan, R.O.C. Tel: +886 (0) 53750488 Fax: +886 (0) 53752330 E-Mail: stairs@stairs.com.tw...