6
T-Product · BCU 465 · 2006 April
Technical Data
Operating Voltage:
115 Vac +10/-15%, 50/60 Hz for
grounded and ungrounded power
systems
Power Consumption:
9VA plus power consumption of
incorporated ignition transformer
See table below
Output current:
2 A per output at 115 Vac
Total current for valves and ignition
transformer maximum 2.5 A
Signal Input Ratings for 50/60 Hz:
Signal Nominal
Voltage
Vac
Maximum
Ratings
Vac
Cur-
rent
mA
0
0
0 – 20
-
1
115
80 – 126.5 typ. 2
Flame sensor voltage:
approx. 230 Vac
Sensor current > 1 µA
Fault protection:
F1 – 3.15 A slow blow, H,
to IEC 127-2/5
F2 – 5 A slow blow, H,
to IEC127-2/5
Note: F2 can only be replaced at
the factory
Function of fault signaling contact:
max 2 A, 230 V, +10%, not inter-
nally fused
Maximum number of operations:
1,000,000 cycles
Ambient temperature: -4 to 140 °F
(-20 to +60 °C)
No moisture permitted inside en-
closure
Enclosure: NEMA 3 (IP 54)
Weight: approx. 11 lbs. (5 kg)
Housing constructed from die-cast
aluminum with 5 x ½” conduit
openings for wiring devices. (Op-
tional quick disconnect plug con-
nectors available upon request)
The BCU 465 has been designed
with a cycle time between two start-
ups. This is to avoid overheating the
ignition transformer as the result of
excessively frequent switching. Cy-
cling the BCU on/off too quickly will
lead to a fault signal. The minimum
cycle time depends on the safety pe-
riod and on the ignition transformer
used.
Ignition Transformer Ratings and Minimum Cycle Times
Ignition Transformer
Mains Fre-
quency
Input
Current
Output
Voltage
Output
Current
BCU 480-5
BCU 480-10
No. Type
Hz
A
Vac
mA
Cycle
s
Cycles per
minute
Cycle
s
Cycles per
minute
1
TZI 5-15/100R
50 (60)
0.9 (0.7)
5000
15 (11)
10
6
20
3
2
TZI 7-25/20R
50 (60)
2.2 (1.6)
7000
25 (18)
30
2
60
1
3
TZI 7,5-12/100R
50 (60)
1.2 (0.9)
7500
12 (9)
15
4
30
2
8
TZI 7,5-20/33R
50 (60)
1.8 (1.35) 7500
20 (15)
20
3
30
2
Notes: Values in () apply to 60 Hz.
On burners with star electrodes, we recommend the use of ignition transformers with 7.5 kV.
If external ignition transformer is used, minimum cycle time shall be 9 seconds.
