Dear Bosko84,

UH50 Heat Meters have a defined order code (type number key). See attached snap shot.

UH50-B45C means:
B = Heat meter for two wire temperature measurement and for mounting in flow

45= Nominal flow rate 3.5 m³/h, length 260mm, nominal pressure PN16, connection G 1¼ B

C = Split version with 1.5m control cable

This means that you can use the UH50-B45C Heat Meter only for measuring the heat power. You can use a UH50-C.. to measure the cooling power. UH50-C.. is a combi meter.

Best regards,

Albis