Unigas HTLX 1025.1, Руководство по установке

Страница: 22 / 116

PART I: INSTALLATION MANUAL
22
Pressure in combustion head - gas flow rate curves
Integrated proving system (burners equipped with LME7x, LMV, LDU)
Gas pressure in
comb
usti
on hea
d (mb
ar)
HTLX1025.1
Stm
3
/h
HTLX1030R
Stm
3
/h
Gas pressure
in
co
mb
usti
on he
ad (mb
ar)
HTLX1025.1
Stm
3
/h
PS
EV1 EV2
/
EV2
EV1
PGCP
This paragraph describes the integrated proving system operation sequence:

At the beginning both the valves (EV1 and EV2) must be closed.

Test space evacuating: EV2 valve (burner side) opens and keep this position for a preset time
(td4), in order the bring the test space to ambient pressure.Test atmospheric pressure: EV2 clo-
ses and keep this position for a preset time (test time td1). The pressure switch PGCP has not to
detect a rise of pressure.

Test space filling: EV1 opens and keep this position for a preset time (td3), in order to fill the test
space.

Test gas pressure: EV1 closes and keep this position for a preset time (td2). The pressure switch
PGCP has not to detect a pressure drop down.
If all of the test phases are passed the proving system test is successful, if not a burner lockout
happens.
On LMV5x and LMV2x/3x and LME73 (except LME73.831BC), the valve proving can be parameteri-
zed to take place on startup, shutdown, or both. On LME73.831BC the valve proving is parameteri-
zed to take place on startup only.