SystemAir AQWL 1404 STD-LN Manuel D'installation page 31

Refrigerant flow diagram - AQWL units
6
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 Plate heat exchanger (Dual type)
7 Desuperheater (optional)
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)
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)
7
1
S
BT
S
EXV
CONTROL
4
VESSEL CATEGORY (≥2) / EVALUATION MODULE
2/mod. D1
2-3/mod. B+D
HAzARD CATEGORY / EVALUATION MODULE
4/mod. B+D
4/mod. H1 (4/mod. D)
A
A
S
UNIT
CONTROL
3
29
AT
G
5
2
D
5