Table 8-1
Fig.8-16 ECH030N piping diagram
SV4
SV6
3
7
26
28
8
9
12
31
11
10
T3
T4
Tz
14
EXVA
16
EXVB
17
18
19
Taf1
Taf2
Twi
Two
inlet
outlet
21
20
22
23
25
24
27
30
29
1
2
4
5
6
13
15
Th
1
Compressor
2
CCH (Crankcase heater )
3
Tp (DC inverter compressor discharge temperature)
4
Switch_Tp(Discharge temperature control switch )
5
PRO-H (High pressure switch)
6
Oil seperator
7
4-way-valve
8
FAN
9
Condenser
10
T4 (Outdoor ambient temperature)
11
T3 (coiloutlet temperature)
12
Filter
13
TZ (coil final outlet temperature)
14
EXVA (System electronic expansion valve 1)
15
Unit for cooling electronic control board
16
SV6 (Liquid side bypass solenoid valve)
17
EXVB (System electronic expansion valve 2)
18
Filter
19
High pressure tank
20
Taf2 (Water side antifreeze temperature)
21
Taf1 (Water side antifreeze temperature)
22
Plate heat exchanger
23
Antifreeze heater of plate heat exchanger
24
Two (Unit water outlet temperature)
25
Twi (Unit water inlet temperature)
26
System pressure sensor
27
PRO-L (Low pressure switch)
28
Th (System suction temperature)
29
SV4 (Fast oil return solenoid valve)
30
Capillary
31
Filter
egend
8.4 System diagram
8.4.1 diagram of ECH030N
Fig.8-16,8-17,8-18 are the function diagrams of the 30、60、90 kW Full-DC Inverter Modular Air-cooled Heat Pump Unit and it shows the.
internal system structure to users, which is made up of main components (such as compressors, electronic expansion valves, Condenser,
plate heat exchanger and so on )、 pipeline and sensors. The unit is equipped with cooling and heating mode with full-DC inverter technology,
and the two mode can switch each other by component 7、11(4-way-valve).The system has two electronic expansion valve EXVA and EXVB.
The EXV
A is mainly used in heating mode, by which is controlled superheat, and in cooling mode it is at maximum opening. The EXVB is used
in cooling mode and it is also controlled by the superheat.
22
To Next Page