I was forced into using a NIC MSC regulated heat pump installer. Now 13 weeks after starting the Heat pump is still not working properly. The Registered “installers” “forgot to install” a Flow switch , an expansion tank , and a Buffer tank! The “installers” halted proceedings while they got one of…

[image] iantelescope: The very popular Sharky is , so far completely out of Sock. Hi @iantelescope The Sharky isn’t out of stock. Certain distributors might not have ordered in anough of them but there’s nothing like the shortage of supply that the industry experienced during the pandemic. M…

FWIW if you specifically want a DN20 (130 mm x G1" flow sensor body) Sharky 775 with 230 VAC and you don’t care for it to be new-new then there are shedloads of them available from a large job back in 2015 that somebody mis-ordered. e.g. [image] NEW - Danfoss SONOMETER™ 1100 Heat Meter 57…

Hi Marko Many many thanks for your excellent input …I stand corrected …the Sharky is readily available. No excuses , my fault. ian

Hi Trystan, Given the resumed interest by the RECC/NIC into my “installer” I must quickly measure the actual output Energy/Power in the water pipes. To save money I would use the much cheaper M Bus not, unfortunately, the Mod-bus. Should I use a direct PC Serial port OR an Arduino acting as mas…

[image] TrystanLea: It would be really interesting to compare the accuracy of using this vs a heat meter and given how common these pumps are perhaps we can test this. I assume @glyn.hudson ’s got this pump with his samsung so I will see if we can look into this here! Yes, that’s the same pump…

Hi Trystan,Glyn Grundfoss Motor surge currents! The visiting SAMSUNG engineer emphasised the point that the Grundfoss motors present an initial Capacitive load. The initial capacitive load of the Grundfoss motors is “initially” charged with a large surge current in excess of 10A Amplitude. As t…

[image] iantelescope: As the SAMSUNG Engineer pointed out the relays do burn out under the large inrush currents. This isn’t exactly news. It happens. The relay contacts need to be made of a suitable material and suitably rated. I suspect size and cost might have had a excessive influence on …

Hi Robert, Glyn, Tristan Again, Robert, many thanks for your knowledgeable expertise! It certainly looks that the primary requirement that SAMSUNG made in their design was cost. However, the suggested SAMSUNG solution to the problem of burnt out relay contacts is the provision of another , large…

Hi Tristan,Glyn et al, I have now tried the PWM motor driver on my SAMSUNG Heat Pump. The PWM signal is ZERO…PWM does NOT Work on a device produced in 2021. Given that the PWM drivers Do Not Work , I am beginning to suspect that these SAMSUNG Motherboards were produced within COVID. Certainly , …

[image] iantelescope: I gather that , you, Glynn have some further experience with these “extant but unused PWM drivers”. PWM is certainly used if the PWM control cable is correctly connected. I’ve just done some testing on my Samsung ASHP UMP3 pump. The pump is not controlled by the relay, i…

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Incompetent Installers , incompetent regulation Do I need a MIM-B19N?

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