GIRBAU PB32 Series Installation, Operation And Maintenance Instructions Manual page 71

When passing through walls or roofs made of wood or other
combustible materials, the diameter of the cavity has to be 100
mm (4 in) greater than the ducting. In these cases the ducting
must be protected by fire resistant material.
Two measuring points should be envisaged that can be closed
during normal operation (Figure 5.16):
A. Opening for inserting the flue gas analyser probe
Approximate diameter: 10/12mm (0,5 in).
Height (H) from the first run of ducting: 1m (40 in).
B. Pressure control opening:
Approximate diameter: 3.5 mm (0.14in).
Height (H1) from the first run of ducting: 0.5m (20 in).
In ducting above 10 m (400 in) or if there is a lot of water from
condensation, install a 1/2" o 3/4" drain at the lowest point, to
drain the water. In cold temperatures, insulate the ducting to
reduce condensation.
It is advisable to follow the instructions set forth in the local
regulations currently in force regarding the exhaust duct outlet.
Assembling the exhaust ducting
Once the ironer is situated in its final position and levelled, secure the exhaust duct to the outlet on the ironer.
DANGER!
To prevent accidental contact with the ironer fan through the extraction output, the
extraction pipe joint must be fitted using a device that is secure and requires a tool for its
disconnection.
See the Technical and Connection details for the machine.
Steps for the connection
71
Fig. 5.16
Code no. 550038
Rev. no. 16/1018