HWA1-A & HWA1-H
Chillers and Air/Water heat pumps with axial fans
13
7.5
Hydraulic circuit
Note: the free cooling is expected only for HWA1 units with EC fan motor.
Models:
HWA1-A/HWA1-H without pump
A
Plate heat exchanger
B
Flow switch
C
Service valve
D
Manometer for inlet pressure
E
Air vent valve
F
Safety valve
Models:
HWA1-A/HWA1-H with 1 or 2 pumps
A
Plate heat exchanger
B
Flow switch
C
Service valve
D
Manometer for inlet pressure
E
Air vent valve
F
Safety valve
G
AC centrifugal pump
H
Europa non return valve
Models:
HWA1-A/HWA1-H with 1 or 2 pumps and inertial storage
A
Plate heat exchanger
B
Flow switch
C
Service valve
D
Manometer for inlet pressure
E
Air vent valve
F
Safety valve
G
AC centrifugal pump
H
Europa non return valve
I
Inertial storage
Models:
HWA1-A / HWA1-H with 1 or 2 pumps for storage tank and free cooling
A
Plate heat exchanger
B
Flow switch
C
Service valve
D
Manometer for inlet pressure
E
Air vent valve
F
Safety valve
G
AC centrifugal pump
H
Europa non return valve
I
Inertial storage
L
Free cooling coil
N
3 way motorized valve
At the highest point of the plant circuit it is necessary to install an automatic air vent valve.
Provide an auxiliary expansion tank (not supplied) in order to control the volume changes in the plant side.
7.5.1
Drainage system
The
HWA1-A/HWA1-H
units all of them adopt drainage holes on the basement for the condensate draining which can leach from
the pipes of hydraulic and refrigerant circuits, and to discharge the generated water during defrosting cycles.
FOR THE HEAT PUMP UNITS, ESPECIALLY IN VERY COLD CLIMATE REGIONS, IT’S RECOMMENDED TO INSTALL ELEVATION
SUPPORTS IN ORDER TO ALLOW ICE FORMATION UNDER THE UNIT WITHOUT DAMAGING IT BY FREEZING.
