CTC Union EcoZenith i555 Pro 1x230V, Руководство по установке и обслуживанию

Страница: 28 / 168

28 CTC EcoZenith i555 Pro
0
100
200
300
400
500
600
700
800
20 25 30 35 40 45 50 55 60
Varmva
tt
envolymdiagram
4. DHW
CTC EcoZenith i555 Pro has approx. 40 m of finned copper coils for the
heating of DHW. 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 DHW
capacity and comfort.
Operating Economy
Many people want to gain maximum benefit from the heat pump’s low
operating costs. The upper and lower tanks’ temperature settings affect
DHW temperature, capacity and operating economy. If the EcoZenith is
allowed to run on lower temperatures, this results in lower DHW 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 circuit 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 DHW 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 electric 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
DHW capacity
Lower tank temperature [ºC]
DHW volume 40ºC [litr
es]