User's Manual

Table Of Contents
DIB-500 R4.1 Component replacement
Replacing fan unit constituents
186 Installation, Operation and Service Manual 90DIB500R41IM_FCC02 99.1
Carry out the following steps:
Positioning the air filter pad
When positioning the air filter pad in the air filter pad holder, ensure that all the edges of
the air filter pad are aligned and make firm contact so that supply air cannot flow past
the air filter pad. Otherwise dirt and dust particles will not be filtered from the supply air
reliably.
1. Position the air filter pad in the air filter pad holder.
2. Press the fastener of the air filter pad holder together to fasten it in the holder
again, refer to Figure 11.6.
Figure 11.6 Fastener of air filter pad holder (top view)
3. Position the air filter pad holder between the two hold points on the sides of the fan
insert.
4. Cautiously slide the air filter pad holder in to the rear.
5. Fit and tighten the air filter pad holder, refer to Figure 11.7.
Figure 11.7 Air filter pad holder mounting screws
You have successfully installed the air filter pad.