Crystal CHP075PX, User Manual

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5. Adjusting the bypass
Use the following procedure to adjust the bypass:
1.Valve 1 wide open. Valve 2 & valve 3 closed.
2.
Slowly open valve 2 & valve 3 by half, then close the valve 1 slowly to increase the water flow to valve 2
& valve 3.
3.
If it shows‘ON` or `EE3’ on the display, it means the water flow into the heat pump is not enough, then
you need to adjust the valves to increase the water flow through the heat pump.
How to get the optimum water flow:
Please turn on the heat pump under heating function, firstly close the by-pass then open it slowly to start the
heat pump (the machine can't start running when the water flow is insufficient).
Continue to adjust the by-pass slowly, at this time check the Inlet water temp. & Outlet water temp., it will be
optimum when the difference is around 2 degree.
Drain out the water in winter for the units without drainage outlet in heat exchanger
Turn off the heat pump and be sure that it is disconnected from
power Turn off the water pump