Checking The Pressurisation In The Expansion Vessel; Cleaning The Burner; Checking The Flue; Drain Pipe Inspection - Biasi M110B.24SM/C User Manual And Installation Instructions

Maintenance
bristle paintbrush and remove the dust with a
hoover.
Fig. 9.8
The siliconic gasket N (Fig. 9.8) must be re-
placed if damaged or anyway every 2 years.
Reassemble the parts carrying out the removal
operations in reverse order.
9.7 Checking the pressurisation
in the expansion vessel
Empty the central heating system as described in
section 9.4 of this chapter and check that the pres-
sure in the expansion vessel is not less than 1 bar.
See also section 4.6 page 20 of this manual.
If the pressure is lower, take steps to correct the
pressure level.
9.8

Cleaning the burner

The burner (38 on page 14) does not need special
maintenance, but it is sufficient to dust it with a
bristle paintbrush.
44
To reach the burner do the operations described
in the section 9.6 of this manual
9.9

Checking the flue

Have the integrity of the flue outlet pipe (48 on
page 15) air intake pipe (49 on page 15), checked
periodically, at least once a year.
For all the above maintenance operations it is ad-
visable to call an approved Service Engineer.
9.10

Drain pipe inspection

Check the soundness and integrity of the conden-
sate drain pipe.
Verify the cleanness and correct filling of the con-
densate traps.
N
9.11 Visual inspection of
appliance
Visually inspect all water joints, seals and connec-
tions for any evidence of leakage and retighten,
grease or replace them as necessary.
9.12

Gas pressures and soundness

Check appliance for gas soundness. Recheck op-
erational pressures as described in section 7.7
page 35 of this manual.
9.13

Water inhibitor concentration

Where chemical products are used the level of
water treatment should be checked on an annual
basis and re treated after full or partial drain down.
A conductivity meter can be used to check the cor-
rect concentration of inhibitor in the heating water.