Enertech CTC EcoLogic Family series, Installation And Maintenance Manual, Page: 100 / 128

100
CTC EcoLogic Pro/Family
For the installer
9.3.3 EcoLogic systems 4 and 5 – Hot water
In EcoLogic system 5, the hot water tank can be equipped with an
immersion heater (E4) as additional heat (E1, E2 or E3) has not been
installed before the hot water tank (as in EcoLogic system 4). Sensor B5
should be installed in the hot water tank.
Hot water (DHW) circulation is obtained from the pump (G40). Fresh hot
water from the hot water tank is mixed in by the mixing valve and chilled
water released down into the tank before once more being heated up. The
non-return valves are necessary to ensure that circulation proceeds as
intended. Control valves allow the desired low of the circuit to be adjusted.
Option B illustrates the possibility of installing (a) hot water tank(s) which is/
are then connected via a heat exchanger to the lower hot water tank shown
in the igure. This solution requires the installation of a sensor (B41) in the
external buffer tank, as well as circulation pumps (G41) before and after the heat
exchanger.
Alternative A
Alternative B
External DHW tank
DHW
tank
DHW tank