Unit installation

Maintenance

13.4 Inspect and Replace the Air Filter

Check the air filter monthly to maintain efficient air distribution through the evaporator coil.

1. Switch Off the CRV.

2. Open the rear panel with the key and access the fan panel by rotating the three locks with a

screwdriver.

3. Wait until the fans stop rotating. When you open the first lock, you also open a safety switch that

cuts the input power; see Figure 46 below.

Figure 46 Air filter location and input power safety switch

To extract the filters (refer to Figure 47:

1. Push up the upper filter.

2. Pull the bottom of the filter away from the Liebert CRV.

3. Pull it out of the unit.

4. Lift the lower filter up

5. Pull the bottom of the filter away from the Liebert CRV.

6. Pull it out of the unit.

Figure 47 Remove the air filters

After cleaning or replacing the filter and before reassembling the unit, check that the air differential

pressure switch pipes (clogged filter alarm) are in the correct position and order. Check also that the

drain trays are clean and the pipe secure.

Push filter up Pull filter away from

Liebert CRV and out

Lift filter up Pull filter away from

Liebert CRV and out