30
7 - Product Description (continued)
Refrigerant flow diagram - AQWH units
SAFETY / CONTROL DEVICES
HAZARD CATEGORY / EVALUATION MODULE
A
High pressure switch (40.5 bar)
4/mod. B+D
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)
4/mod. H1 (4/mod. D)
H
Defrost temperature sensor
S
5/16” shrader connection (service only)
Pipe connection with shrader valve
COMPONENTS
VESSEL CATEGORY (
2) / EVALUATION MODULE
1
Tandem or trio Scroll type compressors
2/mod. D1
2
Air cooled condenser
3
Filter drier
4
Electronic expansion valve
5
Globe valve
6
Check valve
7
Liquid receiver
3/mod. B+D
8
Four-way valve
9
Suction accumulator
2/mod. D1
10
Sight glass
11
Plate heat exchanger (Dual type)
2-3/mod B+D
12
Desuperheater (optional)
Note:
For reasons of readability, one circuit only is shown. The second circuit is identical.
G
F
E
ON
C
A
BT
1
6
6
5
5
8
9
7
11
6
6
3
12
2
D
H
A
S
AT
S
G
4
EXV
CONTROL
UNIT
CONTROL
5
10
