carry out the failed and/or incomplete test(s) in the same way as explained in the contract till satisfactorily complete them in a time to be determined by the Engineer. 

## 4.19.2 Pre-commissioning & Commissioning Tests 

The pre-commissioning and commissioning tests under dry and wet conditions as appropriate shall include all procedures and functions, safety, emergency as well as normal procedures. The Engineer will decide on the equipment to be dry and wet tested. 

These tests are related with commissioning of the works and the individual units of the each equipment by taking its hydraulic, electric and mechanical compliance into consideration. The Contractor shall set out, in his construction documentation, a full list of the pre-commissioning and commissioning tests to be carried out under the Contract to prove compliance with the Employer’s Requirements. Such tests shall include, but not necessarily be limited to: 

Test of structures and pipes 

• Leakage and pressure tests; and 

• Construction materials testing. 

Tests of mechanical equipment 

• Tests of correct direction of rotation of motors; 

• Tests of automatic operation; 

• Tests of manual operation; 

• Tests of capacity of all machines individually and as part of the entire plant; and 

• Tests of quality of materials. 

Tests of electrical equipment 

• Tests of alarm systems; 

• Tests of the emergency switch system; 

• Tests of manual operation; 

• Tests of all interlocking systems; 

• Tests of indications; 

• Tests of all panel functions; 

• Tests of safety systems; 

• Tests of all signals to the SCADA PLC; 

• Tests of modifications of the control systems (new start and stop level etc.); and 

• Full test of all signals to and from the PLCs, instruments and signal converters. 

All testing under “dry” conditions(pre-commissioning) shall be completed to the satisfaction of the Engineer prior to the introduction of “wet” conditions (commissioning) to the plant. . For the key equipment such as aeration blowers, diesel generators, sludge thickening, dewatering and drying equipment and instruments the Contractor shall arrange the supplier’s expert staff to carry out and assist the pre-commissioning and commissioning test. 

All necessary consumables including electricity, spare parts, tools, lubricants, electricity, etc. for the carrying out of tests shall be supplied by the Contractor as part of the Contract. 

