5. Three way valve (3WV):
5.1 Three way valve is controlled by heat pump controller.
5.2 When room linkage switch is connected: hot water is priority, means if both hot water
side and floor heating side need be heated, the three way valve will change to hot
water side, until hot water tank reach preset temp, then the valve will change to floor
heating side. If hot water needn’t be heated, the three way valve will stat at floor
heating side.
5.3 When room linkage switch is disconnected: the three way valve will only stay at hot
water side.
6. Water flow switch (WFS)
6.1 Water flow switch must be installed.
6.2 Because factory hasn’t install the water flow switch in heat pump, so installed should
install it outside heat pump
6.3 Water flow switch is controlled by heat pump controller, input ON/OFF signal to
controller, the port is dry contact.
7. Water pipes:
7.1 Circulating water pipe size should be DN25 (PPR pipe is
Φ
32), water pipe connector
on heat pump is DN25, copper material, internal thread.
7.2 Water pipes must be insulated.
8. About water filled in floor heating pipe
8.1
The water must be purified.
8.2 The water is suggested mixed anti-freeze (same as anti-freeze in car). Because some
place is very cold, and if user leave home for long time, and need turn off the heat
pump, floor heating system may ice up.
Introduction of the system