Oilon ESi 6-17, Installation And Operation Manual

Page: 11 / 80

in the section is regulated based on a heating curve. In normal heating conditions,
the temperature in the section depends on the current need for heating (‘floating
condensing’ operation).
Heat distribution can be arranged using water circulation (floor heating or hot water
radiators) or through air heating. The best coefficient of performance can be achieved
with floor heating, since the lower the temperature of the heat transfer, the better the
coefficient of performance.
Domestic hot water heating
Domestic hot water is heated by drawing domestic cold water through a
coil
or coils
inside the storage tank. In tanks with two sections, the domestic water is pre-heated
in a coil in the lower section, and brought to its final temperature in the tank’s upper
section.
Usually, domestic hot water needs to be heated to a higher temperature than the water
circulating in the heating circuits. Thanks to the two-stage heat transfer enabled by
superheating technology, the larger lower section used for space heating can be kept
at a lower temperature, since domestic hot water is heated up to its final temperature in
the smaller upper section, where the temperature is kept higher. This allows operating
temperatures to be kept as low as possible, improving the system’s annual coefficient
of performance.
E series heat pumps are well-suited for buildings with low demand for domestic hot
water. In such cases, a storage tank with only one section is used, and the heat pump’s
superheating system is not connected.
Using existing tanks
In renovated residential buildings, the heat pump can be connected to an existing
storage tank, provided that the tank is in good condition and is suitable for use
with a ground source heat pump. The heat pump’s superheating system will not be
connected.
1.5 Optional accessories
The ÄssäCooling system
A passive cooling system can be connected to the brine circuit. The brine in the circuit
passes through an additional heat exchanger. The heat exchanger releases cooling
energy to indoor air. The heat exchanger can be a radiant cooling unit installed inside
an air duct or an indoor unit (fan coil unit).
The ÄssäControl system features multiple solutions for cooling control, available as
accessories.
The ÄssäCooling product family includes both wall-mounted and ceiling mounted
indoor units for cooling with the necessary installation accessories included. Passive
cooling is a very economical option, since the only operating costs are associated with
running the system’s circulation pump and fans.
M8010 2204EN 9 (75)