16
8.4.3 Application c
Boiler provide heat for domestic water heating. The ON/OFF of boiler controlled by unit.
The volume of balance tank(8) should be greater than 40L. The drain valve (6) should be installed at the lowest positon
of the system. Temperature sensor T1 must be installed at the outlet of AHS, and connect to the corresponding port in
the main control board of hydraulic module(refer to
9.3.1 Main control board of hydraulic module
), pump(10) should
be controlled by outdoor unit and connect to corresponding port in the outdoor unit(refer to
9.7.6 Connection for other
components/For outside circulation pump P_o
).
NOTE
1
1.1
1.2
1.3
1.4
1.5
1.6
1.7
2
3
Assembly unit
Assembly unit
Coding
Coding
FHL 1…n
8.2
9
10
11
12
12.1
12.2
12.3
13
14
15
16
18
4
6
7
8
8.1
Drain valve
Outdoor unit
Manometer
Pressure relief valve
Expansion vessel
Plate heat exchanger
Air purge valve
Flow switch
P_i: Circulation pump inside the unit
Y-shape filter
Stop valve (field supply)
Wired controller
Drain valve (field supply)
Fill valve (field supply)
Balance tank (field supply)
Air purge valve
22
AHS
/
/
Floor heating loop(field supply)
Expansion vessel (field supply)
P_o: Outside circulation pump (field supply)
Collector / distributor
(field supply)
Domestic hot water tank (field supply)
Air purge valve
Heat exchanger coil
Booster heater
T5: Temperature sensor
Hot water tap (field supply)
P_d: DHW pump (field supply)
One way valve (field supply)
SV1: 3-way valve (field supply)
T1: Outlet water temperature sensor(field supply)
Additional heating source(boiler)(field supply)
FHL1
FHL2
FHLn
----
----
12.1
12.2
12.3
12
13
14
15
16
4
2
3
11
6
7
8.1
8.2
8
10
9
Operation
When heating is required, either the unit or the boiler starts operating, depending on the outdoor temperature (refer to
10.7 field
setting/OTHER HEATING SOURCE
).
18
AHS
1
1.5
1.4
1.2
1.3
1.7
1.6
1.1
As the outdoor temperature is measured via the outdoor unit air thermistor, make sure to install the outdoor unit in the shade,
so that it is not influenced by the sun’s heat.
Frequent switching can cause corrosion of the boiler at an early stage. Contact the boiler manufacturer.
V.2
Summary of Contents for ETH220VMA
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