Table of Contents
Advertisement
Parameters
10 .3 .3 Burner application
Parameter 78
This parameter enables the BCU to be adjusted to vari-
ous burner applications. In addition, an optional pilot
gas valve (V3) can be parameterized via which the
burner is started with a defined ignition capacity.
Parameter 78 = 0: burner 1. Two valves (V1, V2) are in-
cluded for the burner. These are connected to the valve
outputs (terminals 13 and 14). Valves V1 and V2 are
opened in parallel to start the burner in order to release
the gas supply to the burner.
13
14 15
BCU 570
µC
01
02
03
58
47 48
t
t
t
BP
SA1
FS1
Parameter 78 = 1: burner 1 with pilot gas. Three valves
(V1, V2 and V3) are included for a burner with a pilot
gas valve. These are connected to the valve outputs
(terminals 13, 14 and 15). Valves V1 and V3 open to
BCU 580 · Edition 11.15l
V1
V2
52
55
54
04
53
56
9
13
14
15
5
17-18
start the burner. The burner is started with a limited
ignition capacity using gas valve V3. After the elapse of
the safety time t
Valve V3 limits the ignition capacity. After the elapse
of the flame proving period t
closed again.
For this application, it must be ensured that the flame
proving period (P95) is set to a value ≥ 2 s.
01
1
2
3
t
BP
t
▼
(program step 02), valve V2 opens.
SA1
(program step 04), it is
FS1
V1
13
14 15
BCU 570
µC
52
55
54
02
03
04
53
56
58
47 48
t
t
SA1
FS1
V3
V2
9
13
1
14
2
15
3
5
17-18
t
65
Hide quick links:
Advertisement
Table of Contents
