CTC Union EcoZenith i350 L 1x230V, Installation And Maintenance Manual

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63 CTC EcoZenith i360
11.5 Extra functions
There are many types of installation are possible with CTC EcoZenith i360. Several
options are described here. For pipe installation, see the full schematic diagram or
select combinations in the schematic diagram on our website.
11.5.1 Volume tank/equalisation tank
Connection options with volume tank, circulation pump (G1) and sensor (B1)
The heating circuit is extended 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.
11.5.2 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. Requires installation of primary flow sensor (B1), rad circulation (G1) and
non-return valve or volume tank.
11.5.3 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.
11.5.4 External heat source (EHS)
This function is used to connect additional heat sources to the heating circuit, e.g.
water-jacketed stove, solar heat.
The heat from the external heat source is diverted into the system when the set
temperature in the external tank is reached and is at least 5°C higher than the
setpoint in the radiator system. Diversion stops when the temperature is 3°C higher.
The compressor and electric heater stay idle for as long as there is enough energy in
the external heat source. Heat is diverted to both the heating circuit and to hot water.
This comes to an end when one of the following alarms occur: Primary flow sensor 1,
HP in-sensor, Comm. error HP or if Primary flow sensor 1 is hotter than 80 °C.
Enter settings under “Settings/External heat source”.