Scope of supply
The oil meter may only be used for measuring the consumption of heating oil (EL).
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 .
- 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  with cylin- drical threads.
- Do not mix up the inlets and outlets!
- The lip sealing rings supplied  must be used for sealing the screwed pipe connec- tions!
6. Attach oil meter  to the mounting plate  using the clamps .
7. Tighten up the screwed connec- tions. Thereby hold the connecting piece  still with an SW 19 spanner.
During assembly hold here.
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.
Reguarly clean the preconnected filter!
Check connections and lines for leaks!
The measuring unit must be kept clean but requires no maintenance.
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
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.
|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
0,05 bar … 0,1 bar
|Heating oil type||
EL according to DIN 51603
|Temperature range/ambient temperature||
–-5°C … +70°C
DIN 3852-X-G 1/4″, internal
|Boiler capacity/burner capacity||
1,65 kW … 265 kW
HZ 3 RR – Reed contact data
Reed contact with protective resistor 100 Ohm, NO switch
1 pulse = 1 liter
Low-pass before downstream entrance or meter:
Less than 5 Hz/ better less than 1 Hz (recommended)
Type of Contact:
Max. wire gauge:
2 x 2,5 mm2
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)