Carrier 30PA, Инструкции по установке, эксплуатации и обслуживанию, Страница: 19 / 36

Ductable air-cooled scroll
chillers and heat pumps
19
• 30PAC/PHC version (circulation pump included)
These units include a motorised pump group made up of: centrifugal
circulation pump, closed expansion vessel, safety valve with a tare
value of 4 bar, draining valve, and automatic air bleeder valve (model
160HEE and 180HEE).
A kit with a stainless steel mesh
fi
lter (500 microns) is also supplied
for installation by the installer. It is also necessary to install this
fi
lter in the hydraulic power supply to the unit in order to prevent
clogging of the plate exchanger.
The following graph represents the pressure drop for that
fi
lter:
1
2
20
25
3
4
5
6
7
8
9
10
15
2 3 10 15 20 6 7 4 5 8 9
90HEE - 100HEE
120HEE - 160HEE - 180HEE
Flow (m
3
/h)
30PAC/PHC pressure drop (m.w.c.)
2 3 10 15 20
1
2
20
3
4
5
6
7
8
9
10
15
25
6 7 4 5 8 9
120STD / 160STD
90STD / 100STD
180STD
30PAC/PHC pressure drop (m.w.c.)
Flow (m
3
/h)
0,2
2
3
0,3
0,4
4
0,5
5
0,6
0,7
7
0,8
1
Pressure drop in the filter (m.w.c.)
6
0,9
120
/160
/180
90
/100
2 3 10 15 20 6 7 4 5 8 9
Flow (m
3
/h)
Schematic diagram of the hydraulic circuit
DIFFERENTIAL
PRESSURE SWITCH
PLATES
EXCHARGER
SHUT-OFF
VALVE
DRAINAGE
CIRCUIT
EXPANSION
VESSEL
CIRCULATOR
PUMP
SAFETY
VALVE
MESH
FILTER