W HLER DM 2000 Digital Manometer Instruction Manual
- June 4, 2024
- W HLER
Table of Contents
DM 2000 Digital Manometer
Instruction Manual
General
Information about this operating manual
This operation manual allows you to work safely with the Wöhler DM 2000
Digital Manometer. Please keep this operating manual in a safe place for
future reference.
The Wöhler DM 2000 Digital Manometer should be employed by professionals for
its intended use only.
We accept no responsibility for any damage or loss resulting from any failure
to observe this operating manual.
Symbols used in this operating manual
WARNING!
Not following this warning can cause injury or death.
NOTE!
Highlights tips and other useful information.
Proper use
The meter is suitable for the fine-tuning of boilers, The draft measurement, and the differential pressure measurement.
Basic equipment
| Meter | Scope of supply |
|---|---|
| Wöhler DM 2000 | Digital Manometer with batteries |
Hose 1.5 m
Disposal
Do not dispose of electronic equipment along with the household waste. Dispose
of electronic equipment in accordance with valid environmental regulations.
Damaged rechargeable batteries are considered hazardous waste. Dispose of
damaged or used rechargeable batteries at the collection points provided.
Manufacturer’s address Wöhler Technik GmbH
Wöhler-Platz 1
33181 Bad Wünnenberg, Germany
Tel.: +49 2953 73-100
Fax: +49 2953 73-250
E-Mail: [email protected]
Technical Data
| Beschreibung | Angabe |
|---|---|
| Differential Pressure Range | ± 2 bar |
| Accuracy | < 3 % from reading, |
in range ±200 Pa
better than ± 6 Pa
Temperature (optional)
Range| -20 °C up to +99 °C
Accuracy:| < 1 °C
Resolution:| 0.1 °C
Unit| Depending on the
version mbar or Pa
Power supply| 2 batteries AA, 1,5 V
Storage temperature| -20 °C up to +60 °C
Working temperature
.| -5 °C up to +60 °C,
Components
Flue Draft Test
Safety Warning!
You must be qualified to work on heat appliances and gas, oil, or other fuel
supplies. For further instructions contact your local authorities before you
start the job.
The constant flow of flue gases at the correct rate of flow with the least possible variation is required for safe and efficient combustion. Insufficient flue draft will cause ignition difficulties and is likely to result in fume emission and potential health risks. Too much draft will take control of the fire difficult and may result in overheating. In this instance, fitting a draft stabilizer may be required. An appliance manufacturer will specify a range of flue draft conditions under which their appliance will operate.
Choosing the correct place for measuring
The correct place for measuring the chimney draft is close to the appliance
and at least 2 x flue-pipe diameter above the spigot and 15 cm away from any
draft stabilizer. Some appliances include purpose-made flue draught test
points for the insertion of test equipment sampling probes. Where no purpose-
made flue draught point is included a suitable point will need to be provided
adjacent to the appliance outlet. In some instances, a draft measurement can
be taken by temporarily removing a sweeping access cover and using a cone or
plate with a hole in the center to prevent secondary air entry and to enable
the sampling probe to be inserted.
A flue draught reading should be taken before the appliance is lit to identify
any potential problems which will result from down draught.
Procedure for Taking
Flue Draft Readings
The typical procedure when using a Wohler mechanical draft gauge is as follows:
- Visually inspect the draft gauge for signs of damage and/or defect.
- Ignite a small amount of fuel in the appliance and leave it to burn for 20 minutes.
- Turn on the unit and allow the display to stabilize and settle to zero.
- Connect the rubber hose to the negative connector on the unit.
- Connect the stainless steel probe to the end of the rubber hose.
- Insert metal sampling tube into test point preventing secondary air entry.
- Wait approximately 30 seconds for stabilization and then take a draught reading.
NOTE!
Atmospheric or weather conditions may cause incorrect draft readings.
Depending upon the draft reading obtained, it may be necessary to adjust the
appliance air control devices and/or the flue draft stabilizer (if fitted).
Any adjustment should be made in accordance with the manufacturer’s
instructions and the draught reading should be retaken after each adjustment.
If acceptable draft conditions are not able to be achieved, the appliance
should be taken out of service and where appropriate the HETAS Unsafe
Situations Procedure should be followed whilst the fault is rectified. Refer
to Unit HTU03K Section 8 for more details.
Temperature
The meter has an internal temperature sensor. An external temperature sensor
can be connected to the bottom of the meter, see accessories.
NOTE!
The temperature reading will not appear in the display but only on the
printout.
Printing
The pressure and the temperature readings can be printed on the Wöhler TD 100 Thermoprinter, see accessories.
- Switch on the printer.
- Position the meter next to the printer, so that the IR ports of the meter and printer are opposite to each other.
- Start printing with a DoubleClick on the operation button of the Wöhler DM 2000.
Accessories
Hose with draft probe 6 mm Ø, 200 mm long, cone 6 mm Ø and hose 1,5 m long Art
n° 4578
Pressure Measurement Set for Wöhler Digital Manometer Art n° 56126
Combustion air temperature probe, 280 mm, with 1.7 m cable Art n° 9611
Warranty and Service
8.1 Warranty
Each Wöhler DM 2000 will be tested in all functions and will leave our factory
only after extensive quality control testing.
If used properly, the warranty period for the DM 2000 will be 12 months from
the date of sale. Not covered by the warranty are the batteries and the costs
for transport and package.
Service by nonauthorized personnel or making modifications to the meter voids
any warranty.
8.2 Service
We see SERVICE as a very important element in our business. That is why we are
still available to you even after the guarantee period has expired.
- An immediate repair will be carried out if you bring your meter to one of our approved service centers listed below.
- You can obtain immediate help from our engineers by telephone.