Connecting Temperature Probes (Hm Versions Only) - GF U3000 V2 Betriebsanleitung

Installation
4.5

Connecting temperature probes (HM versions only)

The temperature sensors must be located at the flow and return of the system that is being monitored. the area of pipe where they
are to be attached must be free of grease and any insulating material. It is recommended that any coating on the pipe is removed
so that the sensor has the best possible thermal contact with the pipe.
For optimum reliability on boiler applications, the flow measurement needs to be made on the cold side of the system. For opti-
mum reliability in chiller applications, the flow measurement needs to be made on the warmer side of the system.
Temperature Probe
Cold Return
Cold
Heat Energy
Consumer
Temperature Probe
Hot Flow
NOTICE
It must be kept in mind that this is the reading on the outside of the pipe, which may vary significantly from the actual fluid tem-
perature, especially if the pipe material is of some type of insulating material. This does not necessarily invalidate energy readings
since the readings are dependent on the temperature differential, not the absolute temperature. It is the responsibility of the in-
staller to ensure the differential temperature readings are as accurate as possible. This may necessitate covering the sensors with
insulating material to ensure drafts and differences in ambient temperature are minimized for both sensors.
4.5.1 Calibrate the Pt100 Sensors (HM versions only)
NOTICE
The Pt100 sensors must be balanced before initial use, using the procedure described below and used with the cable length sup-
plied. Extending or shortening the cables will negate the calibration
of the sensors.
Please refer to section 'Calibrate temperature sensors'.
26
Return
Hot
Flow
User Manual