GRE HPM20 Manuel D'instructions page 28

5.2 Swimming pool heat pump wiring diagram
Code; HPM30/HPM40
NOTE:
(1) Above electrical wiring diagram only for your reference, please subject machine posted the wiring diagram.
(2) The swimming pool heat pump must be connected ground wire, although the unit heat exchanger is
electrically isolated from the rest of the unit. Grounding the unit is still required to protect you against short
circuits inside the unit. Bonding is also required.
Disconnect: A means to disconnect should be located within sight of and readily accessible from the
unit(circuit breaker, fused or un-fused switch). This is common practice on commercial and residential heat
pumps. It prevents remotely-energizing unattended equipment and permits turning off power at the unit
while the unit is being serviced.
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