Technical Data - Danfoss BCP Serie Manual Del Usaurio

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Technical data

BCP pressure controller with auto reset (fig.1)
BCP pressure limiter with manual reset (fig.2)
Type
Controller Min. limiter
BCP01 –
BCP1 –
BCP2 BCP2L
BCP3 BCP3L
BCP4 BCP4L
BCP5 BCP5L
BCP6 ** BCP6L
BCP7 ** –
Max. test pressure:
Min. test pressure:
Media:
Max. allowable vacuum:
Max. media temperature:
Ambient temperature:
Enclosure:
Pressure connection:
Action type according to EN 60730:
Type BCP
Type BCPL/ BCPH
If the system pressure exceeds MWP then accuracy of the switch
*)
setting can be lost.
**) Pressure switches with double bellows
***) For BCP01 type: -10 – 70 °C
Installation
In order to prevent malfunction of the pressure switch, the
installation must be carried out acc. to the below description.
The cover of BCP should never be dismounted. This is not
necessary neither for installation nor for use of the switch.
The plug should be mounted after installation of the pressure
switch.
Mount the pressure switch directly on the pipe. Always use a
wrench. (fig.3).
Damp strong pressure pulsations. A damping loop will often be
sufficient. Insert a water filled loop as a temperature barrier - for
example a 10 mm copper tube - if there is a risk of the pressure
connection to the switch becoming heated to more than 120 °C.
Steam boilers:
Connecting pipes for the limiter should be connected to the
steam space of the boiler and if necessary, the limiter shall be
protected against the steam temperature by a water seal.
If isolating valve is fitted on the connection pipe, the valve must
be fitted with a position locking device.
Fully flooded hot water generators:
The limiter should be connected to the supply pipe before the
first shut-off valve. The limiter body should be installed vertically
so that dirt does not enter the limiter. If there is the possibility of
sludge build-up in the connection pipe it should be possible to
purge the pipe. Such purging must not remove the water seal or
introduce dirt into the water seal.
In addidition, the connection pipe and its boiler connection must
be designed for cleaning and inspection and have a clear bore of
at least:
1. Where pipe supplies only the limiter:
ø8 mm - if pipe is less than 1m long
ø15 mm - if pipe is more than 1 m long
2
Range Max. working
pressure
Max. limiter
[bar]
– 0.03 – 0.3
– 0.1 – 1.1
BCP2H 0 – 2.5
BCP3H 0 – 6.0
BCP4H 1 – 10
BCP5H 2 – 16
BCP6H ** 5 – 25
BCP7H ** 10 – 40
1.1 × MWP
1 bar
steam, water, air
0.5 bar (BCP1 type only)
max. 120 °C
-20 − 70 °C
***
IP65
G ½A
2B
2BD
IC.PI.P10.K8.53 / 520B8307
2. Where pipe supplies the limiter in addition to other limiters:
ø20 mm - for all lengths of pipes.
Functional testing of the limiter
Since the pressure limiter has no internal possibility for functional
testing, there has to be a provision made for functional testing of
*
the device at the boiler site.
MWP
The result of the test must be clearly visible to the boiler operator.
[bar]
The test function should not decrease the boiler safety or lead the
0.4
pressure limiter to become inoperable e.g. by possible permanent
6
override.
10
16
Wiring
25
Electrical connection:
32
Plug DIN 43650, Pg 11 (fig. 4)
40
63
Contact load
Type A contacts
gold plated silver
When used as gold
contacts:
Min. 1 mA, 5 V
Max. 100 mA, 30 V
If used with current higher than 100 mA and voltage higher than 30 V the gold
1)
layer will be burned away and the unit can not be used as gold again.
2) AC-1 Ohmic load, cosφ 1.
3) AC-15 inductive load like coil
and contactors with cosφ 0.3.
4) DC 13 Direct current load.
Using the appliance in other than described AC-1, AC-3, AC-15 or
DC-13 modes, may not be as a limiter.
Short circuit protection
The BCP contact system and any co-operated external contactors
or relays should, against the effects of short circuits, be over-
current protected with 0.6 safety factor.
It means that the nominal current of the device, as stated by the
manufacturer, is to be multiplied by a safety factor of 0.6.
Example:
Rated load for AC-15 is 2A.
Safety factor is 0,6 in consequence: fuse = 2A x 0,6 = 1,2A or less.
Expected electrical life time:
Min. 250.000 cycles under full contact load.
Adjustment
IMPORTANT:
- Do not adjust pointers beyond the highest or lowest indicator
marks on the scale plate, as this may cause inaccurate switch
operation.
- Do not apply torque greater than 50 Ncm as it can damage the
pointers.
- The scale plate is only for reference and for more precise
setting a pressure gauge should be used.
- Low Switching Point must be above absolute vacuum!
If the differential is set too high on the controller then it will not
switch.
Pressure controller
Scale plate directly indicates High Switching Point (HSP) and
Differential.
1. Set High Switching Point (HSP) by adjusting range screw (fig. 7)
2. Then set Differential by adjusting differential screw (fig. 8)
3. Low Switching Point (LSP) is equal to High Switching Point (HSP)
less Differential:
Type B contacts
silver-cadium oxide
When used as silver
contacts
1)
Min. 500 mA, 250 V
Max: Max:
AC-1: 6 A, 250 V 2) AC-1: 10 A, 250 V
AC-15: 1 A, 250 V AC-15: 2 A, 250 V
3)
DC 13 10 W, 250 V 4) DC 13 50 W, 250 V
LOW = HIGH − DIFFERENTIAL
© Danfoss | DCS (az) | 2017.11
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