Electrically connecting the blower

Note: Risk of damage to unit in the event of short-circuits. Insulate any cable cores that are not needed.

Prescribed tightening torques

Components

Tightening torque

Terminal box cover: M4 stainless steel cylinder head bolts

1.0 Nm

Sheath terminal M7 x 0.75 mm

0.7 Nm

Motor terminals TK

0.7 Nm

Connection

  1. Remove the terminal box cover.
  2. Attach the required cable screw connections (provided by the customer) to the terminal box, guide the power cable through the cable screw connection into the terminal box and secure it with the tension relief.
  3. Connect the mains to the terminal block according to the circuit diagram. Observe the tightening torques.

GRK, GRK R, GRM ES: 230 V AC

GRK R: 230 V AC

 

GRK, GRK R, GRM ES, GRM HT: 400 V 3 PE

  1. Attach and connect the on-off switch.
  2. Connect accessory components that match the unit type, such as speed controller, 5-step transformer, PTC thermistor triggering system or frequency converter. Observe the operating instructions of the accessories. For Maico accessories programme → www.maico-ventilatoren.com.
  3. Fit terminal box cover. The surrounding seal must be tight against the terminal box all around. Notice: Damage to the unit, due to moisture, if the terminal box cover is not properly fitted. Observe the tightening torques.