SystemAir AQWL 1404 STD-LN Manuel D'installation page 33

Refrigerant flow diagram - AQWR units
9
10
C
E
F
COMPONENTS
1 Tandem or trio Scroll type compressors
2 Air cooled condenser
3 Filter drier
4 Electronic expansion valve
5 Globe valve
6 Check valve
7 Liquid receiver
8 Four-way valve
9 Heat recover (dual type)
10 Heat exchange (dual type)
SAFETY / CONTROL DEVICES
A High pressure switch (40.5 bar)
AT High pressure transducer
BT Low pressure transducer
C Water differential pressure switch (105 mbar)
D Air temperature sensor
E Outlet water temperature sensor
F Inlet water temperature sensor
G PED pressure relief valve (45 bar)
H Defrost temperature sensor
S 5/16" shrader connection (service only)
Pipe connection with shrader valve
Note: For reasons of readability, one circuit only is shown. The second circuit is identical.
7 - Product Description (continued)
1
6
S
BT
S
EXV UNIT
CONTROL CONTROL
4 3
VESSEL CATEGORY (≥2) / EVALUATION MODULE
2/mod. D1
3/mod. B+D
2-3/mod B+D
2-3/mod B+D
HAzARD CATEGORY / EVALUATION MODULE
4/mod B+D
4/mod H1/(4/mod. D)
31
AT
S A A
ON
8
G
5
2
H
7
5
6 6
G
D