R32 Hydraulic Working Range; Hydraulic Data; Pump Performance Curves - Hitachi YUTAKI S Series Installation And Operation Manual

4.3

R32 Hydraulic working range

4.3.1 Hydraulic data
Minimum water flow rate (*1)
Maximum water flow rate (*1)
Minimum installation water volume (*2)
Minimum allowable water pressure
Maximum allowable water pressure
(*1): Values calculated based on the following conditions: Water inlet/outlet temperature: 30/35°C, Outdoor ambient
temperature: (DB/WB): 7/6°C.
(*2): Values calculated with an ON/OFF temperature differential value of 4°C.
4.3.2 Pump performance curves

NOTE
If a water flow rate is selected out of the working range of the unit, it can cause malfunction on the
unit. Please, try to operate the pump within the minimum and maximum water flow of the indoor unit.
1.5HP - 2.0HP
8
7
6
5
4
3
2
1
0
0.0 0.5 1.0
Water flow (m
PMEN0643 rev.0 - 04/2023
MODEL
1.5 2.0 2.5 3.0
/h)
3
1.5 HP 2.0HP
m /h 0.5
3
m /h 2.1
3
l 28
MPa 0.1
MPa 0.3
2.5HP - 3.0HP
8
7
6
5
4
3
2
1
0
0.0 0.5 1.0 1.5
Water flow (m
2.5HP 3.0HP
0.5 0.6 0.6
2.1 2.5 2.5
28 28 28
0.1 0.1 0.1
0.3 0.3 0.3
2.0 2.5 3.0
/h)
3
15
4