GRE 777590 Manuel D'instructions page 20

3.5 Typical arrangement
Note: This arrangement is only an illustrative example.
3.6 Adjusting the bypass
To pool
Out
Optimal operation of the heat pump occurs when the cooling gas pressure is 22 ±2 bar.
This pressure can be read on the pressure gauge next to the heat pump control panel. Under these
conditions the water flow through the unit is also optimal.
Note: Operation without a bypass or with improper bypass adjustment may result in sub-optimal
heat pump operation and possibly damage to the heat pump, which renders the warranty null and
void.
In
Heat Pump
Use the following procedure to adjust
the bypass:
From pool
- 17 -
•
fully open all three valves
•
slowly close valve 1 until the
water pressure is increased by
approximately 100 to 200 g
•
Close valve 3 approximately
half-way to adjust the gas
pressure in the cooling system
•
If the display shows "ON" or
error code EE3, close step by
step the valve 1, to increase
water flow and stop when the
code disappear.