Airwell DFO 5 - 9 - 17, Installation And Operation Manual

Page: 13 / 45

4 - WATER CONNECTIONS
Option indicated in the applications with disposable water at a
temperature relatively low (well, groundwater, aqueduct) or
with loop at a variable flow where the unit must operate in
heating with high water temperatures or in cooling with low
water temperatures.
Max work pressure 8 bar.
1.
Internal exchanger with temperature probes
2.
Differential pressure switch
3.
Bleed bibcock
4.
Drainage bibcock
5.
Steel mesh filter (
no supply
)
6.
Manual shut-off valve (
no supply
)
7.
By-pass shut-off valve (water side) (
no supply
)
10. Two-way modulating valve for systems with disposable
water (
no supply
)
4.7 TWO-WAY MODULATING VALVE FOR SYSTEMS
WITH DISPOSABLE WATER
4.8 TWO-WAY ON-OFF VALVE FOR VARIABLE
FLOW RATE LOOP
Option recommended for applications with a variable water
flow rate loop.
Max work pressure 20 bar.
1.
Internal exchanger with temperature probes
2.
Differential pressure switch
3.
Bleed bibcock
4.
Drainage bibcock
5.
Steel mesh filter (
no supply
)
6.
Manual shut-off valve (
no supply
)
7.
By-pass shut-off valve (water side) (
no supply
)
9. Two-way ON-OFF valve for ring with variable flow rate
(
no supply
) It operates coupling with the cooling circuit:
when the compressor is stationary, the valve remains
closed, thereby reducing water consumption.
4.9 STEEL MESH FILTER AND MANUALLY
OPERATED SHUT-OFF VALVE
The option protects the plate exchanger from any impurities
inside the hydraulic circuit. The stainless steel mesh
mechanical filter must be placed on the water inlet line. It also
includes the manually operated two-way shut-off valve located
on the inlet line and required for periodical maintenance
operations.
1.
Internal exchanger with temperature probes
2.
Differential pressure switch
3.
Bleed bibcock
4.
Drainage bibcock
5.
Steel mesh filter (
no supply
)
6.
Manual shut-off valve (
no supply
)
7.
By-pass shut-off valve (water side) (
no supply
)
8-9-10 Regulating / shut-off valves for the system (
no supply)
SIZE
5-9
Filter diameter 1/2’’ 3/4"
Water fitting diameter 1/2’’ 1/2"
Degree of filtration 400 μ m 400 μ m
Unit side water fittings MALE MALE
System side water fittings FEMALE FEMALE
TECHNICAL FEATURES
A
- Standard unit supply limit
A
- Standard unit supply limit
A
- Standard unit supply limit
For the connections see ELECTRICAL CONNECTIONS
section
For the connections see ELECTRICAL CONNECTIONS
section
1
7