Honeywell Krom Schroder BCU 580 - Page 88

BCU 580 · Edition 11.15l 88
Parameters
Parameter 48 = 3: controller enable following operating
signal or in standby.
This parameter is used to activate modulating capacity
control on BCU..F1 and F2. The controller enable signal
is issued via the output at terminal 56 in the start-up
position (standby) and during operation.
t
SA1
t
Z
0402 0300
t
t
FS1
t
SA2
t
FS2
0806 07
88
ϑ1
46
1
ϑ2
4
11
9
5
37-38
13
V1
1
2
14 V2
14 V3
57 V4
17-18
8
56
mA
The air actuator can be opened in standby via the input
at terminal 2 for this purpose. Cooling is then only pos-
sible in the start-up position/standby. The controller
enable signal is suspended during cooling.
t
SA1
t
Z
0402 0300 A0
t
t
FS1
t
SA2
t
FS2
00A0 00 0806 07
2
53
A
17-18
M
56
mA
88
Parameter 48 = 4: opens with V4 pilot burner.
t
SA1
t
Z
A4A2 A300 A0
t
t
FS1
t
SA2
t
FS2
00A0 00 A8A6 A7
2
10
∨
53
A
88
ϑ1
46
1
ϑ2
4
11
9
5
37-38
13
V1
1
2
14 V2
14 V3
57 V4
17-18
8
M
The air valve opens with the start-up fuel rate. The air
valve can be activated externally via the input at ter-
minal 2 for cooling the burner in the start-up position/
standby.
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