Honeywell BCU 370 - 4 Parameters

BCU 370 · Edition 01.19 40
Parameters
4 Parameters
Description Parameter Value range Default Adjustable
1
)
Burner flame signal 01
0–25 µA
Burner switch-off threshold 02
1–20 µA 1 µA
v
Last fault signal 03 XX
Air monitoring during pre-purge 04 0 = Off; 1 = On 1

Air monitoring during operation 05 0 = Off; 1 = On 1

Pre-purge 06
0 = Quick start;
1 = On each start-up
1

Burner start-up attempts 07 1–4 1

Restart after flame failure during operation 08
0 = Fault lock-out;
1 = Restart
0

Safety time during operation t
SB
09 1; 2 s 1 s

Minimum operating time t
B
10 0–250 s 0 s

Minimum burner pause time t
BP
11 0–250 s 0 s

1
st
safety time on start-up, burner/pilot burner t
SA1
12 2; 3; 5; 10 s 5 s

1
st
flame proving period, burner/pilot burner t
FS1
13 0; 2; 5; 10; 20 s 2 s

2
nd
safety time on start-up, main burner t
SA2
14 0; 2; 3; 5; 10 s 3 s

2
nd
flame proving period, main burner t
FS2
15 0; 2; 5; 10; 20 s 2 s

Operating time in Manual mode 16
0 = Unlimited;
1 = Limited to 5 minutes
1

UVS check (1× in 24 hours) 17 0 = Off; 1 = On 0

Pre-purge time t
PV
18 0–250 s 30 s

Post-purge time t
PN
19 0–250 s 0 s

Fan run-up time t
GV
20 0–25 s 2 s

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