Regarding the issues with the heat pump line.
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There are a few questions regarding the heating pump circuit: I understand the principle of the heating pump, and the circuit involves running a pipe from the outlet of the pump in use to the outlet of the standby pump. But there is a check valve at the outlet, so a bypass line is required for that check valve; therefore, does it mean using a pipeline driven by the pump to connect directly to the bypass line of the check valve? Right? Acts as a heat pump
It’s essentially equivalent to a short-circuited outlet check valve, with a small amount of hot oil being circulated
Yes, does that pipeline go directly from the outlet of the reuse pump to the front end of the backup pump’s check valve, or is there a branch line leading to the check valve?
What we do is to create a short circuit in the check valve by connecting its inlet and outlet
Add a small shut-off valve to this bypass line
It seems that what was mentioned above is the preheating wire of a hot oil pump.