User manual HILTI DD 160E

[. . . ] *236036* 236036 DD-160 E Diamond Core Coring System Operating Instructions Système de carottage au diamant Mode d'emploi Sistema de taladro con diamante Manual de instrucciones 2­8 9 ­ 15 16 ­ 22 Sistema de perfuração com coroa diamantada 23 ­ 29 Manual de Instruções Safety precautions for grounded tools Read all instructions Warning!The following fundamental safety precautions must always be observed when using electric tools/machines as protection against an electric shock, the risk of injury and a fire hazard. Please read and take note of these precautions before you use the tool/machine. Please read and keep these safety precautions in a safe place! 1. [. . . ] Protect the motor unit from water spray and rain. For overhead coring, the water collector and water removal system must be in good order and function correctly. 3. 2 Electrical safety 3. 2a Grounding instructions This tool should be grounded while in use to help protect the operator from electric shock. The tool is equipped with a 3-conductor cord and 3-prong grounding type plug to fit the proper grounding type receptacle. The green (or green and yellow) conductor in the cord is the grounding wire. Never connect the green (or green and yellow) wire to a live terminal. If your unit is for use on less than 150 V, it has a plug that looks like that shown in sketch (A) in Figure 1. If it is for use on 150 to 250 V, it has a plug that looks like that shown in sketch (D). An adapter, see sketches (B) and (C), is available for connecting sketch (A) type plugs to 2-prong receptacles. The greencolored rigid ear, lug, or the like, extending from the adapter must be connected to a permanent ground, such as a properly grounded outlet box. No adapter is available for a plug as shown in sketch (D). GROUNDING METHODS The coring system must only be operated with the built-in GFCI ground fault circuit interruptor. In order to ensure safe, trouble-free operation, the drilling system must be kept clean. (Do not clean using a jet of water. ) Drilling work should only be carried out by trained personnel. When working with the vacuum baseplate on walls an additional means of securing the rig must be employed (see section 7. 2). If leakage occurs in the water supply system, the equipment must be serviced. Do not touch rotating parts. The GFCI ground fault circuit interruptor protects the operator in case of faults in the insulation of the motor unit or supply cord (between the GFCI and the motor unit). This device also prevents the machine from restarting on its own accord when power returns after an interruption in the power supply. The earth/ground connection protects the operator from dangerously high voltages in case of coring into live cables. The protective function of the ground fault interrupter must be checked at regular intervals in accordance with regulations issued by national authorities (see section 7. 17). metal screw cover of grounded outlet box grounding pin (A) (B) (C) grounding means grounding pin (D) Figure 1 For the DD-160 E a 20 A plug is demanded that looks like that shown in Figure 2. 3. 3 Overload protection Hilti diamond coring systems are equipped with mechanical, electronic and thermal overload protection devices. Mechanical clutch: Protects the operator, motor and core bit in case the core bit suddenly sticks. Protection against overheating: The motor is protected against overheating by a sensor which auto-matically reduces current input in case of sustained overloading and at high ambient temperatures. The machine can be operated normally after the temperature of the motor windings has dropped to a satisfactory level. The motor windings can be cooled more quickly by allowing the motor to run without load. Figure 2 3. 2b Extension Cords Use only 3-wire extension cords that have 3-prong grounding-type plugs and 3-pole receptacles that accept the tool's plug. [. . . ] (When using a vacuum baseplate, ensure that the vacuum indicator remains within the green area. ) Tips Reduce feed pressure when starting holes in order to avoid vibration. If steel reinforcement is contacted, select lower coring speed if possible and reduce water flow. (Obtain permission from an authorised person before cutting through steel reinforcement. ) The diamond segments can become polished (reduced cutting performance) if coring feed pressure is too low or if the water flow rate is excessive. Insufficient water will cause overheating, resulting in serious damage to the core bit. Reduce coring feed pressure if the overload current regulator is activated. [. . . ]