Kaysun Aquantia KHP-MO 4 DVR2, Installation & Owner'S Manual, Page: 20 / 88

16
8.2.2 Mode set control
Cooling or heating mode is set via the room thermostat, water temperature is set on the user interface.
1) When any “CL” of all the thermostats close, system will be set at cooling mode.
2) When any “HL” of all the thermostats close and all “CL” open, system will be set at heating mode.
Space heating
The circulation pumps operation
1) When the system is in cooling mode, which means any “CL” of all the thermostats closes, SV2 keeps
OFF, P_o starts running.
2) When the system is in heating mode, which means one or more “HL” close and all “CL” open, SV2
keeps ON, P_o starts running.
4
4.2
4.1
10
Outdoor
1
FCU1 FCUn FCU2
FHL1 FHL2 FHLn
19
19
20
5
22
M
Indoor
RT2 RT3
21
RT4
RT5
RT7
RT6
RT8
RT1
2
17
15
16
14 12
14
16
Code Assembly unit Code Assembly unit
1 Main unit
2 User interface
16 Drainage valve (Field
4 Balance tank (Field supply)
19 Collector/distributor
4.1 Automatic air purge valve
20 Bypass valve (Field
4.2 Drainage valve
21
Thermostat transfer board (Field supply)
5 P_o: Outside circulation pump (Field supply) RT 1…7 Low voltage room thermostat
22 SV2: 3-way valve (Field supply
）
RT8 High voltage room thermostat
10
Expansion vessel (Field
supply)
FHL
1…n
Floor heating loop (Field
12 Filter (Accessory)
FCU
1...n
Fan coil unit (Field supply
14
Shut-off valve
15
14Shut-off valve
(Field supply)
supply)
supply)
supply)
)