67
Installation
8.1.8 SPACE HEATING AND DHW
8.1.8.1
ADDITIONAL HYDRAULIC NECESSARY
ELEMENTS
Do not connect the power supply to the unit prior to lling the
space heating circuit (and DHW circuit if it were the case) with
water and checking water pressure and the total absence of any
water leakage.
ACT.
ACT.
ACT.
1
2
3
4
5
6
7
8
9a
14
13
12
11
10
17
9b
15
16
Floor heating
Radiator
Cooling fan coil
Nature No. Part name
Piping connections
1 Water inlet of the unit
2 Water outlet of the unit
3 DHW tank inner coil inlet
4 DHW tank inner coil outlet
5 Water inlet (DHW)
6 Water outlet (DHW)
Factory supplied
7
8
Optional
accessories
9 3-way valve
9a 3WV Cooling
9b 3WV DHW
10 Thermistor (for DHW))
11 Thermistor (for Space heating))
Field supplied
12 Water pump
13 Filter
14 Mixing valve
15 Check valve
16
17 Domestic hot water tank
As an installation example of space heating / cooling and
Domestic hot water (DHW), the following hydraulic elements
are necessary to correctly perform the space heating /
cooling and DHW water circuit:
inlet of the unit.
water circuit. The check valve acts as a safety device to
protect the installation.
A domestic hot water tank (17) has to be installed in
combination with the space heating / cooling.
3-way valves (9) must be connected at one point of
the water outlet pipe of the installation, used to divert
in example, connect straight through of 3-way valve to
DHW tank inner coil.
DHW thermistor (10) must be installed to reach the
inner wall of the DHW tank and keep in good contact
with it. Space heating thermistor (10) must be installed
on the metal tube close to space heating, and keep in
good contact with it.
Mixing valve (14) is recommended to use ESBE
ARA661, which operation mode is 3-point SPDT. If
mixing valve of other brands or models are used, the
operation mode must be 3-point SPDT, and power
supply must be 220-240V ~ 50Hz. The rotation time can
be set in the master controller.
Additionally, the following elements are required for the
DHW circuit:
Nature No. Part name
Piping
connections
1 Supplementary water inlet of DHW tank
2 DHW tank outlet
Field supplied
3
Pressure and temperature relief valve
3a
3b Water check valve
3c Safety valve
4
5 Draining
A Shut-o valve (eld supplied):
tank outlet (2) in order to make easier any maintenance
work.
A Security water valve (Field-supplied):
This accessory (3) is a pressure and temperature relief
valve that must be installed as near as possible to the
Supplementary water inlet of DHW tank (1). It should
ensure a correct draining (5) for the discharge valve of
this valve. This security water valve should provide the
following:
- Pressure protection
- Non-return function
-
- Filling
- Draining
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