27
Fig 38: Unlocking of the heat exchanger box
G
by shifting the fan boxes
F
In the event that the fan boxes F cannot be shifted, the air duct connection stubs of the fan
boxes F must be shortened!
Cut through the EPP connection stubs in the circumferential groove
H
(set point of sectioning)
Fig 39: Shortening of the EPP connection stub at the set point of sectioning of the circumferential groove
H
After having finished the maintenance work, all disconnected air ducts must be reconnected
to the heat recovery unit in air-tight condition. A vapour resistant and thermal insulation must
be established at the sectioning points of the outside and exhaust air connection stubs!
7. Pull out the heat exchanger box
G
in vertical position.
F
F
G
H
