G. Commissioning the heat pump
a.
Flow Rates
The heat pump requires optimisation in order for it to achieve high efficiency and trouble free
operation. For best performance the heat pump temperature difference between the inlet and outlet
temperature should be between 2-3 degrees.
Each heat pump has a minimum flow rate requirement, check the specification table to ensure the
circulation pump in use is adequately sized.
Calibrating the flow rate.
By using the running status function on the touch controller, it is easy to calibrate the valves installed
for optimum flow rates for the heat pump.
Heat pumps have a built-in flow switch which will deactivate the heating function if not enough water
flow is detected. The heat pump has a large operation range, up to a seven-degree differential. If the
temperature differential goes above 7 degrees, the built-in flow switch or E6 error will be displayed
indicating insufficient water flow has been detected.
Recommended procedure to set temperature differential
1.
Open all 2 way & 3 way valves on the by-pass assembly
– on the inlet & outlet pipes.
2.
Fully close the by-pass and switch the heat pump on to the required temperature.
3.
Wait 5 minutes until heat pump is at 100% capacity
4.
Check the inlet and outlet temperatures through the touchpad
controller (Check “Running
status check” in the previous section to obtain C0 and C1 values)
5.
Open the by-pass valve (3 way valve) to increase temperature differential (The difference
between C0 and C1 values)
6.
Close the by-pass valve (3 way valve) to decrease temperature differential (The difference
between C0 and C1 values)
7.
Once optimum temperature difference (2-3 C) achieved lock position of the by-pass (3 way valve) if possible.
1.