17
7.2 Application 2
7.2.1 One zone control
ROOM THERMOSTAT Control for Space heating or cooling need to be set on the user interface. It can be set
in three ways: MODE SET/ONE ZONE/DOUBLE ZONE. The indoor unit can be connected to a high voltage room
thermostat and a low voltage room thermostat. A hydraulic adapter box can also be connected. Another six
thermostats can be connected to the hydraulic adapter box. Please refer to 8.8.6/6) “For room thermostat” for
wiring. (see 9.6.6 "ROOM THERMOSTAT")
Code
Assembly unit
Code
Assembly unit
1
Outdoor unit
17
Shut-off valve (Field supply)
2
Indoor unit
18
Filling valve (Field supply)
3
User interface
19
Drainage valve (Field supply)
5
Balance tank (Field supply)
23
Collector/distributor (Field supply)
5.1
Automatic bleed valve
25
Thermostat transfer board
(Optional)
5.2
Drainage valve
RT 1…7 Low voltage room thermostat (Field supply)
6
P_o: Outside circulation pump (Field
supply)
RT8
High voltage room thermostat (Field supply )
13
Expansion vessel (Field supply)
FHL
1…n
Floor heating loop (Field supply)
15
Filter (Accessory)
Space heating
One zone control: the unit ON/OFF is controlled by the room thermostat, cooling or heating mode and outlet
water temperature are set on the user interface. System is ON when any “HL” of all the thermostats closes. When
all “HL” open, system turns OFF.
The circulation pumps operation
When the system is ON, which means any “HL” of all the thermostats closes, P_o(6) starts running; When the
system is OFF, which means all “HL” close, P_o (6) stops running.
2.1
2
2.1
2.2
2.3
2.5
2.9
2.6
19
6
5
5.2
5.1
13
17
15
FHL1
17
2.7
2.8
2.10
FHL2
FHLn
23
18
Modbus
Outdoor
19
Indoor
1
2.11
F
2.4
RT2
RT3
25
RT4
RT5
RT7
RT6
RT8
RT1
3
