Krom Schroder BCU 46 Series User Manual

GB-29
D
GB
F
NL
I
E
Legend
Ready for operation
Safety interlocks (limits)
HT
High temperature operation
Gas valve
Air valve
Burner
P
Purge
Controlled air flow
Burner operating signal
Start-up signal (BCU)
PZ
Pressure switch for tightness control (TC)
PZH
Pressure switch for maximum pressure
PZL
Pressure switch for minimum pressure
PDZ
Differential pressure switch
P xx
Input signal
depending on parameterxx
M
Control element with butterfly valve
TC
Tightness control
p
u
/2
Half of the inlet pressure
p
d
Outlet pressure
GZL
Valve with proof of closure switch
Input/Output, safety circuit
xx
Optional input
Approaching/checking ignition position
0°➔90°
Approaching max. capacity
90°
Checking position for max. capacity
I
N
Current consumption of sensor/contactor
Technical data
Ambient conditions
Avoid direct sunlight or radiation from red-hot
surfaces on the unit.
Avoid corrosive influences, e.g. salty ambient air
or SO
2
.
The unit may only be stored/installed in enclosed
rooms/buildings that are not accessible to the
public.
This unit is not suitable for cleaning with a high-
pressure cleaner and/or cleaning products.
Ambient temperature:
-20 to +70°C (-4 to +158°F),
no condensation permitted.
Storage temperature: -20 to +70°C (-4 to +158°F).
Transport temperature = ambient temperature.
Enclosure: IP65 pursuant to IEC529.
Safety class: 1.
Pollution degree: internal environment:2,
external environment:4.
Permitted operating altitude: < 2000 m AMSL.
Mechanical data
Weight: 5 kg.
Dimensions (W × H × D): 200 × 230 × 135 mm.
Connections:
Screw terminals:
nominal cross-section 2.5mm²,
wire cross-section (rigid) min. 0.2mm²,
wire cross-section (rigid) max. 2.5mm²,
wire cross-section AWG/kcmil min.24,
wire cross-section AWG/kcmil max.12.
Spring force terminals:
nominal cross-section 2 x 1.5 mm²,
wire cross-section min. 0.2 mm²,
wire cross-section AWG min.24,
wire cross-section AWG max.16,
wire cross-section max. 1.5mm².
Electrical data
Mains voltage:
BCU..Q: 120VAC, -15/+10%, 50/60Hz, ±5%,
BCU..W: 230VAC, -15/+10%, 50/60Hz, ± 5%.
Power consumption: 10VA,
for grounded and ungrounded mains.
Flame control:
with UV sensor or flame rod.
For intermittent or continuous operation.
Flame signal current:
Ionization control: 1 – 25 μA,
UV control: 1 – 35 μA.
Ionization cable, UV cable:
max. 50 m (164ft).
Contact rating:
Valve outputs V1, V2, V3 andV4 (terminals60, 61,
62, 63 and64): max.1A each, cosφ =1 .
Actuator outputs (terminals 65, 66 and 67):
max.1A each, cosφ=1.
Air valve output (terminal 65): max.1A, cosφ=1.
Ignition transformer (terminal 51): max.2A.

Krom Schroder BCU 46 Series Specifications

General

Brand	Krom Schroder
Model	BCU 46 Series
Category	Control Unit
Language	English