CTC Union EcoZenith i550 Pro, Installation And Maintenance Manual

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27 CTC EcoZenith i550 Pro
General Information
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Varmva Ʃ envolymdiagram
4. DHW
The CTC EcoZenith i550 Pro has a total of approx. 40 m finned copper coils
for the heating of hot water. These coils preheat the water in the lower tank
and the water then runs through the upper tank for the final temperature
increase. These two coils running parallel through the EcoZenith allow high
flows with low pressure differential, creating excellent conditions for good hot
water capacity and comfort.
Operating Economy
Many want to gain maximum benefit from the heat pump’s low operating
costs. Many people want to utilize the low operating cost of the heat pump
to a maximum. If the EcoZenith is allowed to run on lower temperatures, this
results in lower hot water capacity but greater savings.
A heat pump is more efficient (has a higher COP value) when it produces
lower temperatures. For the sake of operating economy, this means that
the lower tank of the EcoZenith, which services the needs of the radiators,
should have as low a temperature as possible. A floor heating system uses
low temperatures, which benefits heat pump operation.
Solar energy operation also gives the best yield at lower temperatures.
For example, on a cloudy day the solar panels do not heat up to the same
extent, but still deliver their energy to the lower part of the tank, as the
temperature in there is low.
The EcoZenith is designed so that the temperature can be low in the lower
tank where the preheating of the hot water takes place, and higher in the
upper tank in order to further raise the temperature of the hot water. The
need for hot water controls the temperature in the upper tank first. For best
operating economy, start with a low temperature setting, for instance, the
factory setting, and increase the temperature progressively if there is not
enough hot water. Remember that setting the temperature higher than a
temperature the heat pump can produce means that the immersion heater(s)
will kick in and heat instead. This has an adverse effect on operating economy.
Heat pump 25 kW, flow 22 l/min
Heat pump 10 kW, flow 12 l/min
Heat pump 10 kW, flow 22 l/min
Hot Water Capacity
Lower tank temperature [ºC]
Hot water volume 40ºC [litr
es]