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The oil flow meter and hours of operation counter is used on
single or two- stage burners with throughput rates from 1 to
40 l/h of heating oil EL. It provides the user with various information,
such as oil consumption, number of starts, hours of
operation, etc. plus a warning indication if the flow rate falls
below a preset nominal level, due to either an obstructed
nozzle or filter. By identifying problems with the oil flow, inefficient
combustion and air pollution may be corrected.
The sensor is mounted between the oil pump and the nozzle.
The display can be mounted anywhere on the burner. It is
available in either a mains or battery powered version. Connectors
for the sensor and power cable, plus a code switch
to select the operating mode are located on the back. The
connector for the power supply is only mounted on the
mains powered version. The battery is located in a battery
box.
The sensor is connected to the display by a 2- wire plug and
cable.
The sensor is an oval tooth- wheeled counter with very
small dimensions (30 x 30 x 34 mm). The enclosed oil volume
is only 2 ccm. The material used guarantees high accuracy
and long life. A filter, which is easy to change, protects
the sensor from any floating particles.
The display is enclosed in a plastic housing, which fits into
a standard 22.2 x 45 mm cutout. Located on the front are a
LCD display (6 digits, with leading- zero suppression, metered
units, warning and operating mode symbols) and a
push button switch for selecting the operating mode and
resetting.
PD400 TECHNICAL DATA |
Sensor for heating oil EL |
| Throughput | 1 to 40 l/h |
| Max. Pressure | <25 bar |
| Temp. range | 0 to 60° C |
| Accuracy | ±2,5% (at a volumetric weight of 830 g/dm 3 ) |
| Oil volume | 2 ccm |
| Loss of pressure | =0.1 bar |
| Electrical | 2- wire AMP connector Modu 2 system |
| Oil connection | R 1/8" |
| Mounting attitude | any |
| Weight | 110 g |
Display general |
| Front dimensions | 48 x 24 mm |
| Cutout | 45 x 22,2 mm (DIN 43700) |
| LCD display | 6- digits, w. leading zero suppression |
| Digit size | 8 mm |
| Ambient temp | 0 to 60° C |
| Insulation | Front IP 65 |
| (IEC 144 | Connectors IP 20 |
| Mounting attitude | any |
Display mains |
| Supply voltage | 220 / 240 V (- 15... +10%) 50Hz (40-60 Hz) |
| Current | 10 mA |
| Power connector | 2- wire connector |
| Sensor connector | 2- wire AMP connector Modu 2 system |
| Display visible after | |
| | loss of power 24 h (0- Series: 3 h) |
Display battery |
| Lifetime of battery | 5 years (0- Series: 3 yrs) |
| End-of-life warning | > 1 year before end- of-life |
| Data held during | |
| battery change | 2 minutes |
| Battery | CR 14250, 3 V, 850 mAh |
| Sensor connector | 2- wire AMP connector Modu 2 System |
TECHNICAL FEATURES - PD400 oval gear meter
1 Combination of display and sensor
Display and sensor can be mixed, if the
digits of the type are matching,
e.g.:
PD400- 1 + PD400 or
PD400- 2 + PD400
2. Operation of battery-powered type
Displays with batteries need no mains and
are, therefore, especially suitable for adding
to burners in the field. The lifetime of
the battery is approximately 5 years. One
year before the end- of-life, the crossed battery
symbol appears on the display.
3. Operation of mains powered type
The display is connected to the mains
(220 / 240 V AC) by means of a 2- wire plug
and cable. The display disappears 2 days
after loss of power. All data is retained and
can be displayed when power is restored.
Set- and reset functions are not possible at
mains interruption.
4. Mounting and installation
The sensor is connected by R 1/8" screw
fittings into the oil tube between the oil
pump and nozzle in the flow direction as
stated on the sensor (any mounting attitude).
The display can also be mounted in a
panel with a 45 x 22.2 mm cut- out. The
connection between the sensor and the
display is made by a 2- wire cable and
plug. For the power connector (mains version
only), the appropriate standards must
be complied with.
1. Function of the push button mode
By pressing the push button, the various modes can be selected
in succession. Each mode is displayed by its function
symbol as well as the appropriate unit. The selected
mode remains present until the push button is pressed
again. The new function is first displayed when the push
button is released. With the same push button, the reset
signals for the sum- counter, total reset and threshold levels
(for the service function) are generated.
2. Selection of the operating mode
2 operating modes can be selected by setting the code 3
switches on the back. Single stage burner (also with soft
start function)
The following functions will be displayed:
actual consumption
 sum counter
 totalizer
 total hours of operation
number of starts
 reduced flow rate
 battery life cycle < 1 year
Code switch 1 set to "ON"
Two-stage burner, for genuine 2 stage operation. All possible
functions will be displayed. Code switch 2 has no function3. Sum counter reset
In the mode, function sum counter, resetting the sum
counter can be done by this procedure:
-> press the button for at least 10 secs.
press the button, after 5 secs. the displayed value
flashes for 5 secs. After this, the original value is
displayed continuously, now release the button, is
now displayed.
4. Total reset
A total reset is possible, but should only be done with the
agreement of the manufacturer
5. Service function
Besides displaying various data such as actual consumption,
number of starts and hours of operation, it will also
detect whether the oil throughput has fallen by more than
10% of the nominal value, due to either an obstruct in the
nozzle or preheater failure; on condition the value of the
throughput has been presetted previously at a correct operating
burner (see item 6). If after the reset routine the
throughput has fallen by more than 10%, the service
symbol will appear.
By recognizing and solving this problem, long term inefficiency
and air pollution can be avoided.
6. Determining the momentary throughput
Determining the momentary throughput is done in the normal
mode, function actual consumption:
è press the button for at least 30 secs., but not longer than
32 secs.
press the button, after 25 secs. the displayed actual
consumption flashes for 5 secs. After the display
stops flashing, release the button. As a confirmation,
the service symbol and the actual consumption
as the new defined preset value flash for
5 secs.
On 2-stage burners, preset levels for both stages can be
stored. After a change of the heat rating (replaced nozzle,
different pump pressure etc.), the preset value has to be
newly determined as described above. The original value
will be overwritten by the new value.
7. Deactivation of the service function
Same procedure as under item 6 but the button has to be
pressed for more than 32 secs. By doing this, the preset
value and the service symbol will be resetted:
-> press the button for more than 32 secs.
After releasing the button, as a confirmation the
service symbol and the zero-value flash for 5
secs.
8. Maintenance, Filter
To avoid obstruction of the sensor, as a precaution a micro
filter has to be installed upstream of the burner. Filter size:
less than or equal to 150 m. To trap single floating particles,
a rough filter is built into the sensor.
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