CTC Union EcoZenith i350 H, Installation And Maintenance Manual

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57 CTC EcoZenith i350
10.5 Extra functions
There are many types of possible installation with CTC EcoZenith i350.
Several options are described here.
10.5.1 Volume tank/equalisation tank
Connection options with volume tank, circulation pump (G1) and
sensor (B1)
The heating circuit is expanded with
• CTC VT 80 volume tank
• radiator pump (G1)
• primary flow sensor (B1).
Aim: to achieve a sufficient flow speed for the building in the event of high
energy needs and increased volume to avoid clicks in the radiator system.
If a volume increaser is needed, this requires an extra circulation pump (G1).
For adjustment by degree minutes, install an extra primary flow sensor (B1).
The product will then continue to calculate degree minutes in the heating
circuit even if the heat pump is producing hot water or heating the pool.
Define radiator pump with the touchscreen:
Installer/Define/Define radiator pump (G1) – Yes.
Connection options with equalisation tank
The heating circuit is expanded with an equalisation tank.
Aim: to increase the water volume for defrosting the air-to-water heat pump
and to counteract clicks in the radiator system, such as floor heating.
10.5.3 DHW circulation (accessory)
The settings for hot water circulation require the installation of an expansion
card accessory.
DHW circulation is connected as shown in the schematic diagram. Pump
G40 is used to circulate the hot water.
10.5.2 Electric shut-off valve Y47
For background heating in heating circuit 2, where the heating is switched off
during the summer in heating circuit 1, an electric shut-off valve (Y47) may
be installed. Terminal block A13 is powered during the heating season and
not powered in the summer.