17. Annual Maintenance Cont.
17.5 Checking the pressurization in the expansion vessel:
Empty the central heating system as described in section 17.3 of this chapter and check that the pressure in the expansion vessel is not less than 1 bar (14.5 psi). See also section 13.2 page 26 of this manual. If the pressure should be lower, take steps to correct the pressure level.
17.6 Cleaning the burner:
The sloping and
17.7 Checking the flue:
Have the integrity of the flue outlet pipe (24 on page 12) air intake pipe (25 on page 12), checked periodically, the venturi device (23 on page 12) cleaned and the efficiency of the flue safety circuit checked at least once a year. For all the above maintenance operations it is advisable to call an approved Service Engineer.
To check the pressure at the venturi device, use the test points (12 on page 11).
• Remove the caps of | • Compare the value on |
| |
the pressure test | the gauge with the |
| |
points and connect a | minimum values of |
| |
differential pressure | venturi pressure | Venturi test | |
gauge. | indicated in the | ||
points | |||
• Switch on the boiler | Section 2 on page 10. | ||
|
Figure 17.4
17.8 Visual inspection of appliance:
Visually inspect all water joints, seals and connections for any evidence of leakage and retighten, grease or replace them as necessary.
17.9 Gas pressures and soundness:
Check appliance for gas soundness. Recheck operational pressures and adjust as necessary as described in Section 15.4 page 32 of this manual.
RIVA HEAT ONLY MANUAL - REV A | 38 |
