Technical data

CTC EcoZenith i550 Pro

For the installer

13.3.3 CTC EcoZenith i550 Pro - Solar energy

Solar panels (17) can be connected directly to the EcoZenith’s inbuilt solar

coil (11).

The solar coil is the ﬁnned type. The ﬂuid is pumped from the coil by a

speed controlled solar pump (G30). In a larger system with several panels

of more than about 10m², the panels are connected to an intermediate heat

exchanger (05) and the changing solar energy is pumped to the EcoZenith’s

lower tank by a speed controlled pump (G32). The pumps are powered by

a separate source and their speed is controlled by the EcoZenith. See the

chapter on Electrical installation for more information.

The diverting valve (Y31, plate heat exchanger (18), charge pump for

recharging bore holes (G31) and non-return valves (36) and (41) are used

for recharging bore holes/energy wells with solar energy. The EcoZenith

also starts the brine pump in the ﬂuid/water heat pump (CTC EcoPart) when

recharging is taking place. This means that the charge pump for recharging

the bore hole (G31) is then needed to compensate for the pressure drop

across the plate heat exchanger (18), thus ensuring, in combination with the

brine pump, sufﬁcient ﬂow through the heat collector and exchanger.

Speed controlled pumps (G30), (G31) and (G32), diverting valve (Y31) and

plate heat exchanger (05), (18) are CTC accessories.

See also Solar panels Menu in the Detail Description Menus chapter.

(Installer/Settings/Solar panels)

Solar panels

Y31

Brine system

EL 1-3 a/b

E1/E4

B33

B31

B30

G30

B32

G32

G31