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Instruction for use | Superstatic 749
5.3 Mounting of the temperature sensors
The temperature sensor in the flow meter has no black frame marking on the label.
The temperature sensor with the black frame mark on the label indicates that the sensor must
be mounted in the pipe “opposite” to the Superstatic 749.
Example: If the flow meter is installed on the warm side (Hot Pipe), the temperature sensor with
the black frame mark will be mounted in the cold side (Cold Pipe).
The Superstatic 749 is delivered with temperature sensors having a cable length of 1.5 m.
The temperature sensors form a sub-assembly with the calculator. The temperature sensor
cables must be neither shortened nor lengthened.
The temperatures of use displayed on the label must be respected.
A temperature sensor may be fitted directly in the Superstatic 749 flow meter. The temperature
sensors will preferably be fitted directly, in other words one temperature sensor will be fitted in
the flow meter while the other sensor will be installed on the other side of the heat exchanging
circuit.
Note:
The temperature sensors will be fixed with a plastic nut. This plastic nut consists of two
half-nuts held together by a rubber band. If the rubber band is removed from the nut, the two
nut halves will no longer be held together on the temperature sensor and one or both nut halves
may separate from the temperature sensor.
1. Remove the O-ring from the temperature sensor. Be careful not to remove the rubber band
(symbolized by the letter "E" on the drawing) from the nut as it may separate into two parts
and fall on the floor.
2. Fit the O-ring on the mounting template pin.
3. Insert the O-ring by rotating it using the fitting template in the position provided for the ball valve.
4. Position the O-ring definitively with the other flat end of the fitting tem-plate.
5. Insert the temperature sensor with the two half-nuts in the thread M10x1 of the ball valve
and screw down by hand as far as it will go (maximum tightening torque of 1 Nm).
Note: The mounting template pin is not included in the delivery and can be ordered separately
(Article number: 0460P348).
When sensor pockets are employed, these must be used specifically for the two temperature
sensors and must correspond to the list set out below.
Asymmetrical mounting is also possible. In that case the temperature sensor having a cable
marked with black frame will be fitted in the other side of the heat exchanging circuit in a sensor
pocket defined according to the table set out below.
For applications with non-symmetrical integrated temperature sensor pair restricted rated
operating conditions are to be in accordance with the lower limit of the flow value and the lower
limit of the temperature difference: qi ≥ 200 l/h at ∆Tmin = 3K or qi ≥ 60 l/h at ∆Tmin ≥ 6 K.
Make sure that the sensors are mounted until they stall with the bottom of the sensor pocket.
