Hydraulic Connections; 2-Way Regulating Valve - Accessory - Panasonic PAW-FC Installation And Maintenance Manual

6. Hydraulic connections

CAUTION:
All installation equipment and mounting material must be provided by the installer.
Flexible pipes are recommended for connecting the coils to prevent transmission of vibration.
The unit is provided with inlet and outlet female connections for both 2 and 4 pipe models.
An air bleed valve is also provided (See figure), which can be adjusted using an 8 mm wrench.
IMPORTANT
To make water connections to the heat exchanger or the valves use threaded joints and suitable materials that can ensure perfect
tightness.
Models PAW-FC**-U020 to PAW-FC**-U040
Ref. Description
1 Water inlet C (C/H)
2 Water outlet C (C/H)
3 Air bleeding valves
4 Water inlet H
5 Water outlet H
IMPORTANT
- When making the hydraulic connections, ensure that no impurities are introduced into the pipework.

6.1 2-way regulating valve - accessory

The water flow has to be controlled by installing the motorized thermo-electric valves supplied an accessory or by installing motorized
field supplied valves.
Ref. Description
1 Actuator
Valve ½"
2
Valve ¾"
Valve 1"
3 Shell
4 Clips
5
Gasket
IMPORTANT
Using a 2-way regulating valve MANDATORILY requires the fitting of additional balancing valves in the water circuit, to prevent water
from circulating in the unit when the fan is not operating and to maintain a steady water flow in the rest of the water circuit.
2-pipe
PAW-FC2*-U020 to PAW-FC2*-U050 to
PAW-FC2*-U040 PAW-FC2*-U070
¾"
¾"
-
-
-
2-pipe
PAW-FC2*-U020 to PAW-FC2*-U050 to
PAW-FC2*-U040 PAW-FC2*-U070
1
-
1
-
1
3
2
13
Models PAW-FC**-U050 to PAW-FC**-U070
PAW-FC4*-U020 to
PAW-FC4*-U040
¾" ¾"
¾" ¾"
- -
- ½"
- ½"
PAW-FC4*-U020 to
PAW-FC4*-U040
1 2
- 1
- 1
1 -
1 1
3 3
2 4
4-pipe
PAW-FC4*-U050 to
PAW-FC4*-U070
¾"
¾"
-
¾"
¾"
4-pipe
PAW-FC4*-U050 to
PAW-FC4*-U070
2
-
1
1
1
3
4