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Evgeniy Labunskiy avatar image
Evgeniy Labunskiy asked

Viessmann Heat Pump Smart Grid Control using Cerbo GX

What I have

1. Viessmann Air-to-Water Heat Pump with Vitotronic 200 wo1c control module. It supports Smart Grid. It operates using 2 connections

Combination of On/Off states of this connections control heat pump performance. For example if C is off and D is off than pump in standard mode, C on D off - compressor off mode, etc. So basically I can tell to heat pump than I'm on batteries (no grid) and stop generating heating. Or if solar production is high and overcome grid consumption to heat water +10 degrees.

2. I have multi rs solar + cerbo GX

The question is: can I setup control system with cerbo that can implement such scenarios? Anyone has any guidance?

cerbo gx
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3 Answers
Evgeniy Labunskiy avatar image
Evgeniy Labunskiy answered ·

How do I see it: I can control relay ports from Nodered. If grid = not connected than I can make relay to on state, etc. the question is if this relay is compatible with relay on heat pump

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Duivert NL avatar image
Duivert NL answered ·

hi cerbo relays are just contacts, als long as you respect the specs of those relays you can control anything

from cerbo gx section 20.1 https://www.victronenergy.com/upload/documents/Cerbo_GX/140558-CCGX__Venus_GX__Cerbo_GX__Cerbo-S_GX_Manual-pdf-en.pdf

relays: 2 x NO/NC DC

up to 30VDC: 6A DC

up to 70VDC: 1A

AC: 6A, 125VAC

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Evgeniy Labunskiy avatar image Evgeniy Labunskiy commented ·
Need to check with Viessmann cause I cannot find voltage requirements for pins on their end
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Duivert NL avatar image
Duivert NL answered ·

thats an expensive solution i mean something like this, 2 pieces:

1717588425054.png

the cerbo controls this relay and then this relay controls the heatpump


1717588425054.png (242.8 KiB)
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