comatec AQWL Installations- Und Wartungshandbuch Seite 32

Refrigerant flow diagram - AQWH units
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 Suction accumulator
10 Sight glass
11 Plate heat exchanger (Dual type)
12 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)
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)
12
11
C
E
F
6
VESSEL CATEGORY (≥2) / EVALUATION MODULE
2/mod. D1
3/mod. B+D
2/mod. D1
2-3/mod B+D
HAzARD CATEGORY / EVALUATION MODULE
4/mod. B+D
4/mod. H1 (4/mod. D)
AT
S
A
A
ON
1
9
S
BT
EXV
UNIT
CONTROL
CONTROL
G
7
4
6
30
8
G
5
H
5
6
6
5
10
3
2
D