MANN+HUMMEL MICRODYNNADIR BIO-CEL 50 Owner's manual

TECHNICAL INSTRUCTION – MICRODYN BIO-CEL®
FORM NO.: TI-WW024
REVISION: B | DATE: 07/01/2020
MICRODYN BIO-CEL®
Diffusor Replacement
Introduction
This document is showing the procedure of diffusor replacement. The procedure can be applied for BIO-CEL®
50/52/100/104/208/400/416/L/XL (not for BIO-CEL® L-2/XL-2). The pictures used in this instruction belong to BIO-CEL®416,
the general steps are the same for all above mentioned BIO-CEL modules.
In case of any question which might derive during the mounting procedure, please don´t hesitate to contact us, the contact
information are shown at the end of the document.
For disassembly of the diffuser case from the module frame please refer to the corresponding document on our website
(https://www.microdyn-nadir.com/mbr-bulletins-guides/)
Safety Precautions
Please follow section 1, Safety & Warnings in the latest version of the MICRODYN BIO-CEL MBR Operation and Maintenance
Manual.
Material Required for disassembly & assembly
Please refer to the corresponding scope of supply document ((https://www.microdyn-nadir.com/mbr-bulletins-guides/) for the
part numbers needed for this replacement.
Pos. Part Remarks
1 BIO-CEL® Diffuser Set Set of diffusers + connectors
2 BIO-CEL® Diffuser Assembly Tool a Torque wrench with special wrench socket (must be ordered separately)
3 Set of fork or socket wrenches of different sizes Customers scope of supply
4 Integrity test kit Customers scope of supply (optional only)

TECHNICAL INSTRUCTION – MICRODYN BIO-CEL®
FORM NO.: TI-WW024
REVISION: B | DATE: 07/01/2020
Diffusor Replacement Procedure
DISMANTLING OF OLD DIFFUSORS
1
Dismantle the diffusor counterpart plate
by loosening the outer screws.
Remove the blue caps, they are not
needed any more.
NOTE
Removing the blue caps are only
needed if they are still mounted.
Put the plate and steel parts aside for
later mounting
i

TECHNICAL INSTRUCTION – MICRODYN BIO-CEL®
FORM NO.: TI-WW024
REVISION: B | DATE: 07/01/2020
2
Turn the frame on the rear end.
Disassemble the blind cap with the
special socket wrench.
If there are round shaped blind caps
(older systems) use a pipe wrench to
remove it.
Remove the double threaded connector
with the blind plug from the opposite
side of the distributor

TECHNICAL INSTRUCTION – MICRODYN BIO-CEL®
FORM NO.: TI-WW024
REVISION: B | DATE: 07/01/2020
3
Clean the air distributor as good as
possible.
If sludge is present in the distributor,
open the ½“ screw on the bottom of
the distributor to flush the sludge out.
Once the distributor is clean again,
tighten the screw again with 45Nm.
ATTENTION!
Make sure that the surface of the
distributor is absolutely even and
free from any deformation. Make
sure that the surface and inside of
the distributor is free of sludge
and debris like stones, wood
pieces, dust or chips.

TECHNICAL INSTRUCTION – MICRODYN BIO-CEL®
FORM NO.: TI-WW024
REVISION: B | DATE: 07/01/2020
MOUNTING OF NEW DIFFUSORS
1.
Take the new diffusor tubes and screw
the double threaded connector into the
diffusor tube till the end.
Make sure there is a flat seal mounted
on the diffusor tube.
ATTENTION!
Please check for any damages on
the diffusors before mounting.
Damaged diffusor membranes can
lead to severe performance loss
and damage of the module.
2.
Check that the flat seal (63x4mm, one
side rough) is on the blind plug.
The rough side of the flat seal needs to
be outside (looking at you).
flat seal