Grundfos CRIE - Constant pressure; Constant temperature

English (GB)
29
13.5.1 "Constant pressure"
We recommend this control mode if the pump is to
deliver a constant pressure, independently of the
flow in the system. See fig. 26.
Fig. 26 "Constant pressure"
This control mode uses the factory-fitted pressure
sensor, if any, which measures the outlet pressure of
the pump.
For pumps without a factory-fitted sensor, you must
connect a pressure sensor to one of the analog
inputs of the pump. You can set the pressure sensor
in the Assist menu. See section 13.42 Assisted
pump setup.
Fig. 27 "Constant pressure"
Controller settings
For recommended controller settings, see section
13.12 "Controller" (Controller settings).
Factory setting
See section 24. Factory settings.
13.5.2 "Constant temperature"
This control mode ensures a constant temperature.
Constant temperature is a comfort control mode that
you can use in domestic hot-water systems to control
the flow to maintain a fixed temperature in the
system. See fig. 28.
Fig. 28 "Constant temperature"
This control mode requires a temperature sensor
placed at the location where the temperature is to be
controlled. See the examples below:
Fig. 29 "Constant temperature"
Controller settings
For recommended controller settings, see section
13.12 "Controller" (Controller settings).
Factory setting
See section 24. Factory settings.
Pump variant "Constant pressure"
CME ●
CRE, CRIE, CRNE,
SPKE, MTRE
●
TM05 7901 1613
Examples
• One external pressure sensor.
H
Q
p
p
Pump variant
"Constant
temperature"
CME ●
CRE, CRIE, CRNE,
SPKE, MTRE
●
TM05 7900 1613
Examples
H
Q
t
t
t