INSTALLATION AND OPERATION MANUAL

VENTILATION UNIT CALIBRATIONThe units are equipped as standard with a motor-fan assembly, the various STANDARD components of which are detailed in the table.Model Q.tà Motor ModelMotor RATEDPowerFor further constructive details see the MAINTENANCE section.VARIABILE MotorPulleyThe pulleys installed on the motor shaft have a VARIABLE diameter.The variation of the diameter involves:Fan Model Fan FIXED Pulley Belt Model50-80 1 MAA 112MS4 B3 5,5 kW VAR 187 A1 AT 18-18 G2L SPA 355/1 SPA 188290-1001 MAA 112 M4 B3 4 kW VAR 187 A1 AT 18-18 G2L SPA 355/1 SPA 18821 MAA 100 LA4 B3 2,2 kW VAR 187 A1 AT 18-18 S SPA 355/1 SPA 1882115-130 3 MAA 100 LB4 B3 3 kW VAR 177 A1 AT 18-18 S SPA 355/1 SPA 1882145-160 3 MAA 112MS4 B3 5,5 kW VAR 187 A1 AT 18-18 S SPA 355/1 SPA 1882180-200 4 MAA 112MS4 B3 5,5 kW VAR 187 A1 AT 18-18 S SPA 355/1 SPA 1882Opening of the Pulley Diameter Fan speed Applicationspulley fully closed (turning in aclockwise direction)which require low or no head(free mouth)max max need a high headminminneed a low or no head(free mouth)The factory setting of the motor pulleys is fixed to obtain a residual static head of about 100 Pa.Residual static head Model 50-80 90-100 115-130 145-200motor current input [A] 11,2 8,3 4,9 6,5 11,2100 PaMotor power input [kW] 6,4 4,8 2,7 3,7 6,4Fan revs [rpm] 760 755 750 710 760MOTOR PULLEY OPENING FULLY OPEN - 2 TURNIf the total static load given by the sum of the losses due to the air intake and discharge channels is appreciably different from100 Pa there may be:Channels loadloss (PCC)Number of fanrevolutionsMalfunction Motor pulley setting(1) (2) (3)LOW(150Pa)Increasepossible overload of theelectric motorIf the absorption of the electric motor is lower than theallowed maximum (see ELECTRIC DATA section) it isnot necessary to change the motor pulley setting. If theabsorption is higher, set the pulleyFREE MOUTH (0 Pa)FULLY OPEN50Pa