Unigas HTLX92R Installation Manual page 17

Connection diagram of the air pressure switch to the burner air conduct
Burner air pressure switch
P1
Fan installation
Connect the air duct to the burner by means of the bellows unit provided together with the burner (see the
picture below).Install the bellows units provided as explained on pages 13-14.
ATTENTION! The bellows unit provided is made of canvas and is provided with blocking spacers to avoid
breaking it during installation: first place the bellows unit between flanges, then remove the spacers. Canvas has
to be stretched after the installation, but not stressed.
ATTENTION! the air duct dimensioning must be perforformed according to the flow rate, the temperature, the
distance between the fan and the burner and according to the fan features as well..
ATTENTION! It is suggested to install the fan on vibration-damping supports in order to reduce vibration
propagation.
E
Air conduct
Copper tube connection Ø 6 mm:
- Drill the air duct (with hole from Ø 10 mm);
- Fit sleeve A (Ø 10 mm) and weld it on channel E;
- Assemble in sequence the B-D details on the tube (Ø 6 mm)
C appropriately shaped up to the connection on the air
pressure switch (P1).
Picture refers to application with air pressure switch
mounted on the junction box. Other applications are
provided with air pressure switch mounted on the air
damper.
Iron sleeve Ø 10 mm
A
Male elbow fitting Ø 6 mm x 10
B
C Copper tube Ø 6 mm x 1,5 mt
D
Nut for male elbow fitting Ø 6 mm x 10 mm
17
PART II: INSTALLATION