baltur TBG 85 MC, Installation, Use And Maintenance Instruction Manual

Page: 55 / 76

ENGLISH
17 / 36
0006160008_201711
VPS 504 VALVE TIGHTNESS CONTROL (IF PRESENT)
It checks the tightness of gas cut-off valves.
This check is carried out as soon as the boiler thermostat authorises
burner operation creating, by means of a membrane pump, an
overpressure greater than the upstream pressure by 20 mbar in the
test circuit.
If you wish to carry out a check, place a pressure gauge corresponding
to the PA pressure plug.
If the test circuit has a positive result, the LC authorisation lamp
(yellow) switches on after a few seconds.
In order to restart, it is necessary to unlock the equipment using the
LB light button.
The fuse can be accessed using a screwdriver to remove the cover
that is located near the sockets for electrical connection; a spare fuse
is located in the upper part of the tightness control, under the cap.