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Verfügbare Sprachen
Verfügbare Sprachen
Maks. kabellængde mellem BHO og LD/LDS: 20 m.
Maks. tilladelig omgivelsestemp. for LD/LDS: –20
til +70°C.
Kontrol af flammesignal fig. 6
Fotostrømmen skal for BHO 70 serien mindst
være 65 uA ved 230 V.
Kontrol af falsklyssignal
Uden flamme må fotostrømmen for BHO 70 se-
rien maksimalt være 5 µA ved 230 V.
Tidsfunktion/forklaring
Automatens udgangssignaler
Krævede indgangssignaler
A'
Igangsættelse af brændere med oliefor-
varmer OFV
A
Igangsættelse af brændere uden oliefor-
varmer
B
Flammedannelse
C
Driftsstilling
D
Brænderstop
tw
Opvarmning af olieforvarmer indtil kon-
takt OTR slutter
t1
Forventilation
t2
Sikkerhedstid
t3
Fortænding
t3n
Eftertænding
t4
Interval mellem flammedannelse og akti-
vering af ventil V2 (klemme 5)
ENglISH
Oil Burner Control
Type BHO 71.10
Type BHO 72.10/72.11
Type BHO 73.10
Type BHO 74.10
Application
The oil burner controls in the BHO 70 series are
used for monitoring and control of 1 or 2-stage
oil burners with or without an oil preheater.
According to the existing standards (ISO 3544
and EN 230:2005) the BHO 71/72/73 (with 10 s
safety time) can only be used for burners with
firing rates of less than 30 kg oil per hour.
The BHO 74.10 is used for burners with firing
rates of more than 30 kg oil per hour and for hot-
air aggregates (WLE). In these categories max. 5
s safety time is required.
The flame is monitored by a photo unit type LD
or type LDS. The photo unit LD has normal light
sensitivity. The photo unit LDS has increased
light sensitivity.
Classification codes
The controls in the BHO series are classified
according to EN 230:2005 and EN 267:1991 cl.
5.1.3.2.
Type
Classification code
BHO 71.10
FMCLXN
BHO 72.10
BHO 72.11
FTCLXN
BHO 73.10
BHO 74.10
FTCLXNWLE
Compatibility
The BHO 70 series is compatible with the BHO 64
series according to the conversion table below.
BHO 64
BHO 70
series
series
BHO 71.10 1-stage system
BHO 64
BHO 72.10 2-stage system
2-stage system,
BHO 64.1
BHO 72.11
short prepurge/
long post-ignition
2-stage system,
BHO 64 A
BHO 73.10
short post-ignition
(terminals 6 and 7)
2-stage burners above
LOA 44
BHO 74.10
30 kg/h + WLE
Symbols
L
N
Hold relay
When operating with oil preheater, the hold
relay above terminals 3 and 8 will make sure that
the burner stays in operation, if the OTR thermo-
stat brakes.
Note: When operating without preheater, terminal
3 and 8 must be short-circuited.
Base
The base is fitted with 12 terminals for the con-
tact plugs of the burner control. Furthermore, it
is fitted with:
• 3 extra neutral terminals connected to terminal
2
• 4 interconnected earth terminals, which can
be connected directly to the burner housing
by a plate
• 2 loop terminals marked 31 and 32
• 2 ∅5.4 mm holes for fastening of the base
The base is available with 2 different front plates.
One front plate has one knockout on each side
and three identical ones and an oval one on the
front. The other front plate is designed for 5 Pg
11 screwed connections.
Upper part/base
The upper part and the base are kept together
by a spring system. The upper part is released by
pressing a screw driver down into the slot. See
fig. 5.
Mounting
The base is mounted with 2 screws through
the ∅5.4 mm holes. The burner control can be
mounted in any position.
Electrical connection
The BHO burner control must be connected as
shown in figures 1-4.
Note: Remote reset (BHO 74.10) may only be con-
nected to a push button switch.
Technical data
Rated voltage:
Voltage range:
Frequency:
Supply fuse max.:
Enclosure:
Ambient temperature:
Transportation- and
storage temperature:
Undervoltage protection:
Protection class:
Pollution degree:
Remarks
Terminal loads
Terminal
6/7
10
Note: Total current max. 10 A.
Boiler thermostat
High temperature cutout
Ignition unit transformer
Burner motor
Solenoid valve
Photo unit
External alarm
Phase wire
Neutral wire
Oil preheater
Oil preheater thermostat
Hold relay
230 V ~
195-253 V ~
50-60 Hz
10 A
IP 40
–20 to +60°C
–30 to +70°C
<170 V
II
2
Max. current
3
5 A
4
1 A
5
1 A
1 A
8
5 A
1 A
Function
Normal start
When operating with oil preheater, start signal
from the preheater must be given before start-
ing.
After the pre-ignition and prepurge time, the oil
will be released and the flame is ignited.
After the post-ignition time, the burner will be
in normal operation (BHO 71.10).
For all other variants, valve 2 is switched on and
the burner will be in normal operation.
Post-
Pre-
igni-
Type
Code no.
purge
tion
t1* t3
t3n
BHO
057H6101
13
15
71.10
BHO
057H6102
13
15
72.10
BHO
057H6103
6
20
72.11
BHO
057H6104
13
2
73.10
BHO
057H6105
25
2
74.10
* Prepurge time and pre-ignition time are coincident.
But due to the initialization of the electronics, it will last
up to two seconds before the ignition is switched on.
Safety time
See the table above.
Undervoltage protection
(European standard EN 230:2005)
In the event of under voltage <185 V, the BHO
burner control will prevent the burner from
starting. If undervoltage <170 V occurs during
operation, the BHO burner control will cut off
the oil supply and stop the burner.
In the two undervoltage situations the burner con-
trol reset button will show a flash code (8 flashes).
The burner control will automaticly restart the
burner as described under "normal start", when
the voltage has again reached 185 V.
Overvoltage
If the mains voltage should reach 264 V, the BHO
burner control will lockout and a flash code can
be read in the reset button, see the paragraphs
Alarm/reset-function and Flash codes.
Max. preheating time
When a BHO burner control has a preheater that
is connected to the mains voltage, it will wait for
a starting signal on terminal 3. If this does not
happen within 10 min., the burner control will
lockout and a flash code can be read in the reset
button, see the paragraphs Alarm/reset-function
and Flash codes.
False light during start up
If the photo unit is exposed to light before the
end of the prepurge time, the burner control will
not release oil and will lockout. A flash code can
be read in the reset button, see the paragraphs
Alarm/reset-function and Flash codes.
No flame formation during start up
If the oil is released and no flame has formed in
the safety time, the burner control will lockout.
A flash code can be read in the reset button, see
the paragraphs Alarm/reset-function and Flash
codes.
Flame failure during operation
In the event of flame failure during operation,
the oil supply is cut off after max. 1 sec. and the
burner control restarts the burner as described
under "normal start". In case of more than 3
flame failures during the same operating period
(BHO 74.10 only 1 flame failure), the burner con-
trol will lockout and a flash code can be read in
the reset button, see the paragraphs Alarm/reset-
function and Flash codes.
Safety
Inter-
time
vals
t2
V1-V2
max.
10
15
10
20
10
15
10
5
5
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