Method for installing an elevator

A method for installing an elevator, the elevator to be installed including elevator car guide rails, an elevator car or partially completed elevator car, a hoisting rope or two or more parallel hoisting ropes, a traction sheave configured to be disposed in a first location that is fixed relative to an elevator shaft of the elevator, a compensating system configured to be disposed in a second location that is fixed relative to the elevator shaft, a plurality of first diverting pulleys in an upper part of the elevator shaft, a plurality of second diverting pulleys in a lower part of the elevator shaft, a plurality of third diverting pulleys on the elevator car or partially completed elevator car, and a plurality of fourth diverting pulleys on the elevator car or partially completed elevator car, the method comprising:

• stopping the elevator car or partially completed elevator car in the lower part of the elevator shaft;
• rigging second rope portions of the hoisting rope or two or more parallel hoisting ropes between the elevator car or partially completed elevator car and the second diverting pulleys, while the elevator car or partially completed elevator car is stopped in the lower part of the elevator shaft, so that the second rope portions pass via the second diverting pulleys and the fourth diverting pulleys;
• moving the elevator car or partially completed elevator car to the upper part of the elevator shaft, while at the same time supplying ropes from rope reels to the second rope portions between the elevator car or partially completed elevator car and the second diverting pulleys, wherein the second rope portions become longer due to moving the elevator car or partially completed elevator car;
• and
• rigging first rope portions of the hoisting rope or two or more parallel hoisting ropes between the elevator car or partially completed elevator car and the first diverting pulleys, while the elevator car or partially completed elevator car is stopped in the upper part of the elevator shaft, so that the first rope portions pass via the first diverting pulleys and the third diverting pulleys;
• wherein, when installed, the traction sheave moves the elevator car using the hoisting rope or two or more parallel hoisting ropes,
• wherein, when installed, the compensating system causes a first rope tension in the first rope portions,
• wherein, when installed, the compensating system causes a second rope tension in the second rope portions,
• wherein, when installed, the compensating system compensates rope elongations in the first and second rope portions so as to maintains a ratio of the first rope tension to the second rope tension substantially constant, and
• wherein, when installed, the plurality of first diverting pulleys are mounted directly to the elevator car guide rails or each of the plurality of first diverting pulleys is mounted to the elevator car guide rails via a separate supporting element.