Braun Messtechnik HZ 3 User manual

Oil Meter HZ 3 and HZ 3 RR Mounting Instructions
Scope of supply
1. HZ 3 oil meter or HZ 3 RR oil meter
2. Lip sealing ring (2 off)
3. Clamps (3 off)
4. Mounting plate
5. Mounting instructions
Safety advice
Before mounting the oil meter these
instructions must be carefully read
through and followed!
Danger of fire from combustible
liquids! Take great care during
grinding, cutting and welding work!
Fires, open lights and smoking are
forbidden! Always keep fire
extinguisher ready for use!
Danger of injury from sharp edges!
Be careful during mounting!
Danger of crushing! The falling
measuring unit can crush feet!
Purpose
The oil meter may only be used for measuring the consumption of heating oil (EL).
Mounting
1. Check measuring device and accessories for completeness and the required operating and
ambient conditions (-> see section:”Technical data”).
2. Adapt the pipe line as appropriate. The measuring unit must be easily accessable!
• In case of supply systems without pumps the intake height must be at least 1m!
• Installing the oil meter on the suction side, a filter must be installed in front of
the oil meter with a mesh size of 50- 75 µ. Air inclusions must be avoi- ded since
they cause measu- ring errors. If necessary the pipeline system or the scre- wed
connections should be checked for tightness.
3. Clear any swarf and other conta- mination from the lines.

4. Attach retaining plate [4].
• The side or bottom connec- tions can be selected.
• The meter must always been installed in an upright position and the seal on the
counter cap must always be on top.
5. Remove sealing plugs and screw in screwed plugs [6] with cylin- drical threads.
• Do not mix up the inlets and outlets!
• The lip sealing rings supplied [2] must be used for sealing the screwed pipe
connec- tions!
6. Attach oil meter [1] to the mounting plate [4] using the clamps [3].
7. Tighten up the screwed connec- tions. Thereby hold the connecting piece [7] still with an
SW 19 spanner.

During assembly hold here.
Starting up
Where no pump is fitted to the supply system: Open valve and bleed air completely from
system.
In the case of pressurized systems: switch on pump, open shut-off valve and bleed air from
the system.
• Avoid pressure surges so as not to damage the measuring unit.
• Entrapped air causes false measured results and can lead to damage!
The counter can be read as follows:
One revolution of the pointer equals 1 l. After that, it will switch to the counter wheels. Full
litres can be read from the wheels and the pointer position gives the decimal places.
Maintenance
Reguarly clean the preconnected filter!
Check connections and lines for leaks!
The measuring unit must be kept clean but requires no maintenance.
Calibration
In case of calibrated HZ 3 oil meters, calibration is valid for 10 years. Thereafter the oil meter
can be recalibrated by the manufacturer.
Identification of the HZ3 calibrated oil meter:
Registration no. 5.223/92.02 and “Class 1″on company name plate
Manufacturing number starts from 500.000 and increases
Domestic calibration:
The calibration expiry date is stamped on the lead seal
EEC initial calibration:
The date on which the counter was calibrated is stamped on the lead seal.
Technical Data
Flow rate range calibrated 0,18 … 12 l/h

Maximum flow rate 30 l/h (25 kg/h)
Possibility to read from the oil meter 0,01 l … 99999,99 l
Measuring accuracy ±1 %
Nominal pressure
6 bar
Pressure loss 0,05 bar … 0,1 bar
Heating oil type EL according to DIN 51603
Temperature range/ambient temperature –-5°C … +70°C
Connecting thread DIN 3852-X-G 1/4″, internal
Boiler capacity/burner capacity 1,65 kW … 265 kW
Weight 1,25 kg
HZ 3 RR – Reed contact data
Pulse Tachometer:
Reed contact with protective resistor 100 Ohm, NO switch
Power Rating:
AC/DCmax.30V/30mA
Pulse value:
1 pulse = 1 liter
Low-pass before downstream entrance or meter:
Less than 5 Hz/ better less than 1 Hz (recommended)
Type of Contact:
Screw terminal
Max. wire gauge:
2 x 2,5 mm
2
Logic Diagram:
Installation options
Central oil supply

can be read on the tank
can be read in front of the combustion point
Single pipe system (Installation in suction pipe)
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