14 Technical data
Installer reference guide
99
RRLQ004~008CA + RHBH/X04+08CB
ROTEX HPSU low temperature Bi‑bloc
4P384979-1 – 2015.01
14.8
ESP curve
14.8.1
ESP curve: Indoor unit
Note:
A flow error will occur when the minimum water flow rate is not
reached.
EHBH/X04=RHBH/X04
70
60
50
40
30
20
10
0
0
5
10
15
20
25
30
A (kPa)
B (l/min)
C
4D090624-1A
EHBH/X08=RHBH/X08
70
80
60
50
40
30
20
10
0
0
5
10
15
20
25
30
35
A (kPa)
B (l/min)
C
4D090624-1A
A
External static pressure
B
Water flow rate
C
Operation range
Operation area is extended to lower flow rates only in case the unit
operates with heat pump only. (Not in startup, no backup heater
operation, no defrost operation).
ESP=External static pressure [kPa] in the space heating/cooling
circuit.
Flow=Water flow through the unit in the space heating/cooling
circuit.
Notes:
▪ Selecting a flow outside the area of operation can cause damage
or malfunction of the unit. See also the minimum and maximum
allowed water flow range in the technical specifications.
▪ Water quality MUST be according to EN directive EC98/83EC.
