Cooling can be obtained in different ways, by using the cooling ducts in the bottom and the top of the unit, by taking air in and out the back of the unit or by

combining the cooling possibilities.

Duct cooling

A dedicated option has been developed to optimize installation of IP00/chassis drive types in Rittal TS8 Units utilizing the fan of the frequency converter for forced

air cooling of the backchannel. Please consult GE for more details.

The air out the top of the Unit could but ducted outside a facility so the heat loses from the backchannel are not dissipated within the control room reducing air-

conditioning requirements of the facility.

Please contact GE for more information.

Back cooling

The backchannel air can also be ventilated in and out the back of a Rittal TS8 Unit. This offers a solution where the backchannel could take air from outside the

facility and return the heat loses outside the facility thus reducing air-conditioning requirements.

NB!

A doorfan(s) is required on the Rittal cabinet to remove the loses not contained in the backchannel of the drive. The minimum doorfan(s) airflow required at the

drive maximum ambient for the 43 and 44 is 391 m^3/h (230 cfm). The minimum doorfan(s) airflow required at the drive maximum ambient for the 52 is 782

m^3/h (460 cfm). If the ambient is below maximum or if additional components, heat loses, are added within the Unit a calculation must be made to ensure the

proper airflow is provided to cool the inside of the Rittal Unit.

Airflow

The necessary airflow over the heat sink must be secured. The flow rate is shown below.

Unit Size protection

IP21 / NEMA 1

IP54 / NEMA 12

IP21 / NEMA 1

IP54 / NEMA 12

IP00 / Chassis

* Airflow per fan. Unit Sizes 5X contain multiple fans.

Table 5.2: Heatsink Air Flow

5.3.7 Installation on the Wall - IP21 (NEMA 1) and IP54 (NEMA 12) Units

This only applies to 41 and 42 Unit Sizes (460V, 125 - 300 HP, 575/600V, 125 - 400 HP). It must be considered where to install the unit.

Take the relevant points into consideration before you select the final installation site:

•

Free space for cooling

•

Access to open the door

•

Cable entry from the bottom

Mark the mounting holes carefully using the mounting template on the wall and drill the holes as indicated. Ensure proper distance to the floor and the ceiling for

cooling. A minimum of 225 mm (8.9 inch) below the frequency converter is needed. Mount the bolts at the bottom and lift the frequency converter up on the bolts.

Tilt the frequency converter against the wall and mount the upper bolts. Tighten all four bolts to secure the frequency converter against the wall.

Unit Size

41 and 42

61, 62, 63 and 64

43 and 44

AF-600 FP High Power Operating Instructions

Door fan / Top fan airflow

170 m

/h (100 cfm)

340 m

/h (200 cfm)

700 m