Cetetherm AquaEfficiency EFB112 DD, Инструкция по установке, обслуживанию и эксплуатации

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Cetetherm AquaEfficiency
Installation, service and operating instruction
10
Installation of an AlfaPilot unit
5.1 Operating principle AlfaPilot
AlfaPilot is a simple and reliable system based on comparative measure of primary return, S3, and primary
storage vessel temperature, Pt1. AlfaPilot acts as a “piston” effect on the primary storage vessel allowing
fulfilling peak demands of Domestic Hot Water.
If the temperature in Pt1 is higher than the temperature in S3+

T (

T is settable, default value is 5°C), stored
hot water in the primary vessel will be sent to the boiler/generator or the heating network. The primary vessel
will be filled up with cold water from the primary return, before the AlfaPilot, until measured temperature in Pt1
becomes lower or equal to the temperature in S3 +

T.
The colder the temperature is in S3, the more efficient is the AlfaPilot.
Pay attention when making the settings of flow rates and temperature difference on the tap water systems
primary side.
In the case, PT1
≤ S3+

T, the primary storage vessel is by-passed and heat recovery in the primary storage
vessel goes on with help from solar panels or other renewable heating source, for example heat pump or
geothermal. The 3-port valve opens, and flow goes from AB to A port.
The primary return water enters the modulating
valve in port ‘AB’.
If the water is sufficiently cold, return water flows
through port
‘B’ to the bottom part of the primary
storage vessel.
If the water is too hot, return water flows through
the ‘A’ port, towards the boiler/heat generator.
5.2 Flowchart AlfaPilot
ID. NAME ID. NAME
A Primary inlet Pt1 Primary vessel temperature sensor
B Primary outlet Pt2 Mixing AlfaPilot outlet temperature sensor
CW Cold Water inlet S1 DHW temperature sensor (master)
DC Drain valve S2 Secondary inlet temperature sensor
DHW Domestic Hot water S3 Primary return temperature sensor
HE Heat Exchanger S4 Primary inlet temperature sensor (optional)
NR Non Return Valve S5 Outdoor temperature sensor (optional)
PC Charging pump (secondary) V Shut-off valve
PP Primary pump V3V 3-port control valve with actuator
PR DHWC pump VR Balancing valve
PRV Safety valve RS Renewable source