Nilfisk-ALTO FLOORTEC R 870 Service Manual

Contents

Nilfisk-ALTO FLOORTEC R 870 Service Manual Manual pdf 43 page image

Dust Control System43Service Manual – Floortec R 870Dust Control SystemFunctional DescriptionThe dust raised in the compartment of the main broom, is collected in the rear cargo area by a flow of air gener-ated by the dust control systemThe filter located between the vacuum system and the hopper, retains dirt which is then conveyed through afeedbox into the hopper itselfThe operation of the system depends on the activation of the main broomBy deactivating the main broom, the dust control system turns off automatically.There is a vacuum system motor (M1) which is powered by the relay (K1) and protected by the fuse (F1)The relay (K1) is directly controlled by the dashboard electronic board (EB2) according to the information re-ceived by the vacuum system/filter shaker switch (SW3), by the sensor on the broom activation lever (S2), bythe machine moving signal received by the drive system electronic board(EB1) and by the lifted hopper sensor(S1)Normally the vacuum function is turned on when the main broom is lowered with the lever; it can, however,be turned on or off independently with the push-button SW3, it turns off when the machine is stopped, whenthe hopper is lifted and during activation the electric filter shaker.There is an electric filter shaker motor (M2) which is powered by the relay (K2) and protected by the fuse (F2).The relay (K2) is directly controlled by the dashboard electronic board (EB2) according to the information re-ceived by the vacuum system/filter shaker switch (SW3): When the button is activated for a cycle of 20 secondsduring which it is driven 0 5 sec ON and 0 5 sec OFF for continuously modulating the number of revolutionsand the resulting vibration frequencies of the filter.The vibrating motor shakes the filter allowing dirt trapped in the folds of the same to fall by gravity into thehopperThis reduces filter maintenance and helps to maintain proper airflow through the filter.Wiring DiagramCONTROL PANEL ELECTRONICBOARD (EB2)DRIVE SYSTEMELECTRONIC BOARD (EB1)VACUUMSYSTEM FUSE (F1)FILTER SHAKERFUSE (F2)DISPLAY ELECTRONICBOARD FUSE (F3)FILTER SHAKER/VACUUMSYSTEM SWITCH (SW3)VACUUM SYSTEM MOTORFILTER SHAKER MOTORVACUUMSYSTEM RELAY (K1)VACUUM SYSTEM RELAY (K1)FILTER SHAKER RELAY (K2)FILTER SHAKER RELAY (K2)J1.11 - Vacuum system relay power supplyJ1.1 - Electronic board power supply +J2.2 - Vacuum system activation signalJ2.1 - Control panel switch power supply (+)J2.7 - Machine moving signalJ1.9 - Electronic board power supply -POSITIVE SIGNAL(FROM MACHINE ON “K4”)BATTERY NEGATIVE TERMINALJ1.12 - Filter-shaker relay power supplyJ1.18 - Machine moving signalJ2.3 - Filter-shaker activation signalJ1.8 - Lifted hopper signalJ1.2 - Broom activation lever signalHOPPER LIFTINGSENSOR (S1)MAIN BROOMLEVER SENSOR (S2)J2.11 - Lifted hopper inputM2M1P200102