Elgas DATCOM, Operating Instructions Manual

Page: 58 / 228

5
Installation and Commissioning
56
After the indexer adjustment is finished it is imperative to carry out a RESET
of the device!
You can reset the device either from the keypad of the device - menu System data
(see section 6.8.2), or via the service software [42], [43].
Changing the indexer settings will not be accepted without resetting the device.
Fig. 15 Indexer rotation direction adjustment (ELCORplus indexer)
5.4.4 Connecting the Pressure Transducer
To apply pressure to the pressure transducer, or the 3-way valve, we recommend using
precision seamless 6x1mm stainless steel pipes or approved plastic hoses fitted with suitable
end caps. The measured pressure comes from the gas pipe from the Pm outlet (former Pr)
on the gas meter body or directly from the pipe (e.g. by means of a welded-on pressure
fitting to connect the pressure pipe of the required size). The pipeline pressure outlet is
positioned in accordance with the manufacturer's instructions for the gas meter used, usually
in front of the gas meter, while the recommended distance depends on the type of the gas
meter (rotary, turbine, etc.).
The corrector connected via the 3-way valve is shown in Fig. 11. Pressure tube 6x1
6 with cutting ring pre-pressed on both sides is first thoroughly inserted into the pressure
inlet of the device and secured with M12x1,5 ERMETO nut. The other end of the tube is
attached to the 3-way valve working outlet fitted on the mounting plate and the nut is gently
tightened. The last operation is tightening the nuts on both sides of the connecting pressure
pipe. Excessive force must not be applied when tightening the key, otherwise the thread will
be damaged.
5.4.5 Connecting the Temperature Transducer
Connecting the temperature transducer by means of a thermowell fitted on the gas meter is
the preferred method of connection. If no thermowell is fitted on the gas meter, a weld-on
fitting for mounting the thermowell is welded according to the gas meter manufacturer’s
instructions, typically at a distance of 1x DN to 2x DN after the gas meter in the media flow
direction.