Heraeus HS 9 Service Manual page 104

Retrofit Kit Instructions
Disassembly rear wall
6.
( see disassembly instruction 50046989 )
Separate the sealant with a sharp cutting tool.
Remove the cross screws
Remove the rear wall
7. Opening the inspection chamber
Untighten the two locking screws and remove them
from the hood bracket [4] with the spacers.
Open the hood.
Remove the two nuts [7] of the cable retainers,
then remove the cable [6].
Remove the retaining screws of the two guide rails [2],
then remove the guide rails with the hood brackets.
Remove the six retaining screws [9] of the cover [8].
Separate the sealant in the joint [10]
with a sharp cutting tool.
Remove the cover.
8. Replacement of the downflow filter
Remove the three retaining screws [3] of the plenum frame.
Lift off the plenum frame and remove the downflow filter [4] forward.
Remove plenum frame and plenum bag.
Valid: 12.2001
Digital display air flow velocity HERAsafe HS/HSP
50072901 4