HTM HTW-V5WD2N8 Manual De Usuario E Instalacion página 114

Coding Assembly unit
1 Outdoor unit
Manometer
1.1
Pressure relief valve
1.2
Expansion vessel
1.3
Plate heat exchanger
1.4
Backup heater（Customized model）
1.5
Air purge valve
1.6
1.7
Flow switch
P_i: Circulation pump in the unit
1.8
Y-shape filter
2
Stop valve (field supply)
3
4 Wired controller
The volume of balance tank(8) should be greater than 40L(for 5~9kW unit, greater than 20L) The drain valve (6) should
be installed at the lowest positon of the system. An independent backup heater can be selected and installed in the door.
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).
Pump operation
The circulation pump (1.8) and (10) will operate as long as the unit is on for space heating.
As the temperature sensor is used to detect the room temperature, the user interface (4) should be placed in a room
where floor heating loops and fan coil units is installed and away from the heating source. Correct configuration should
be applied in the user interface (refer to 10.7 field settings/TEMP. TYPE SETTING). The target room temperature can
be set on the main page of user interface, the target outlet water temperature will be calculated from climate related
curves, the unit will turn off when the room temperature reaches the target temperature.
Space heating and cooling
According to the season, the customer selects cooling or heating through the user interface. The unit (1) will operate in
cooling mode or heating mode to achieve the target room temperature. In heating mode, the 2-way valve (19) will open. Hot
water is provided to both the fan coil units and the floor heating loops. In cooling mode, the motorized 2-way valve (19) is
closed to prevent cold water running through the floor heating loops (FHL).
Wiring of the 2-way valve (19) is different for a NC (normal closed) valve and a NO (normal open) valve. The NO valve
is unavailable to this unit. Make sure to connect to the correct terminal numbers as detailed on the wiring diagram.
The ON/OFF setting of the heating/cooling operation is done by the user interface.
8.5 Application 5
Space heating with an auxiliary boiler (alternating operation).
Space heating application by either the unit or by an auxiliary boiler connected in the system.
The unit controlled contact (also called "permission signal for the auxiliary boiler") is determined by the outdoor temperature
(thermistor located at the outdoor unit). See 10.7 Field settings/OTHER HEATING SOURCE.
Bivalent operation is possible for both space heating operation and domestic water heating operation.
If the auxiliary boiler only provides heat for space heating, the boiler must be integrated in the piping work and in the field
wiring according to the illustration for application a.
If the auxiliary boiler is also providing heat for domestic hot water, the boiler can be integrated in the piping work and in the
field wiring according to the illustration for application b. In this condition, the unit can sent ON/OFF signal to boiler in heating
mode, but the boiler control itself in DHW mode.
If the auxiliary boiler only provides heat for domestic water heating, the boiler must be integrated in the piping work and in
the field wiring according to the illustration for application c.
Coding
Drain valve (field supply)
6
Fill valve (field supply)
7
Balance tank (field supply)
8
Air purge valve
8.1
8.2 Drain valve
9 Expansion vessel (field supply)
P_o: Outside circulation pump (field supply)
10
Collector (field supply)
11
Bypass valve (field supply)
17
SV2: 2-way valve (field supply)
19
Floor Heating Loop (field supply)
FHL 1...n
FCU 1...n Fan coil units (field supply)
NOTE
NOTE
CAUTION
109
Assembly unit