FCU 500, FCU 505 · Edition 02.17
111
Parameters
Large test volumes
If large test volumes are to be checked for tightness, it
is possible to reduce the testing time. A second pres-
sure switch is required for this purpose to monitor the
test volume V
p1
. The first pressure switch (at termi-
nal 45) is set so that it monitors ¼ of the inlet pres-
sure p
u
, the second pressure switch (at terminal 65)
monitors ¾ of the inlet pressure p
u
.
The “Reduced DG test duration” function is activated by
setting parameter 70 to 1. Terminal 65 is thus assigned
the function “Input for 3p
u
/4 pressure switch for tight-
ness test”. Terminal 45 is thus assigned the function
“Input for p
u
/4 pressure switch for tightness test”.
PZL
PZH
FCU 500..C1
µC
P
49
13
14
50
47
58
48
TC
PZL
PDZ
M
>750°
ϑ
1
2
3
V
p1
V1
V2
p
u
p
z
p
d
p
u
/4
PZ
PZ
3p
u
/4
65
45
1
2