Honeywell BCU 465 - Burner Application

BCU 460, BCU 465 · Edition 11.19 79
Parameters
11.5.2 Burner application
Parameter A078
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 A078 = 0: burner 1. Two valves (V1,V2) are
included for the burner. These are connected to the
valve outputs (terminals 60 and61). Valves V1 and V2
are opened in parallel to start the burner in order to re-
lease the gas supply to the burner.
BCU 46x
µC
V1
V2
61 6260
52
55
54
53
56
47 4858
030201 04
2
1
3
51
61
62
60
22
96
t
t
FS1
t
SA1
t
BP
1
Parameter A078 = 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 out-
puts (terminals 60, 61 and62). Valves V1 and V3 open
to start the burner. The burner is started with a limited
ignition capacity using gas valveV3. After the elapse of
the safety time t
SA1
(program step02), valve V2 opens.
Valve V3 limits the ignition capacity. After the elapse
of the flame proving period t
FS1
(program step04), it is
closed again.
For this application, it must be ensured that the flame
proving period (parameterA095) is set to a value ≥2s.
BCU 46x
µC
V1
V2
V3
61 6260
52
55
54
53
56
47 4858
030201 04
2
1
3
51
61
62
60
22
96
t
t
FS1
t
SA1
t
BP
1
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