Legend; Technical Data - Krom Schroder BCU 46 Series Operating Instructions Manual

Legend

Ready for operation
Safety interlocks (limits)
High temperature operation
HT
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 /2
Half of the inlet pressure
u
p
Outlet pressure
d
GZL
Valve with proof of closure switch
Input/Output, safety circuit
Optional input
xx
Approaching/checking ignition position
Approaching max. capacity
0° 90°
90° Checking position for max. capacity
I Current consumption of sensor/contactor
N

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.
GB-29