Install Instructions

Table Of Contents

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11.4.2 Constant temperature

This control mode ensures a constant temperature.

Constant temperature is a comfort control mode that can be used

in domestic hot-water systems to control the flow to maintain a

constant temperature in the system. See fig. 23. When this

control mode is used, no balancing valves must be installed in the

system.

Fig. 23 Constant temperature

This control mode requires an external temperature sensor as

shown in the examples below:

Fig. 24 Constant temperature

11.4.3 Constant differential pressure

The pump maintains a constant differential pressure,

independently of the flow in the system. See fig. 25. This control

mode is primarily suitable for systems with relatively small

pressure losses.

Fig. 25 Constant differential pressure

This control mode requires either an external differential-pressure

sensor or two external pressure sensors as shown in the

examples below:

Fig. 26 Constant differential pressure

TM05 7900 1613

Examples

• One external temperature sensor.

TM05 7901 1613

Examples

• One external differential-pressure sensor.

• Two external pressure sensors.