Originally Posted by
frank
Gents
Look carefully at the one way valves.
When in heating mode, (top sketch) the liquid exiting the condenser HE bypasses the outlet of the LH TEV, enters the filter drier and then the RH TEV. As it exits this TEV to feed into the evaporator HE, it also feeds back towards the LH TEV and creates a loop of liquid between the TEV's
It's similar when in cooling mode.
The machine feeds a Pre-heat coil/Pre-cooling coil on an AHU
I'm used to seeing the NRV's on a bypass across the TEV, not as shown here