Wilo Yonos PARA RSTG 25/7.5 Betriebsanleitung Seite 23

• Mains cable, length 530, 800, 1500, 2000 mm with connection plug
Type Facon PR61 (Fig 5)
• PWM signal cable, length 500, 1000, 1500 or 2000 mm with connection plug
(Fig. 6)
• 2 gaskets
• Thermal insulation shell
• Cooling shell
6
Description and function
6.1 Description of the pump
The pump (Fig. 1) consists of a hydraulic system, a glandless pump motor with a
permanent magnet rotor, and an electronic control module with an integrated
frequency converter. The control module contains both an operating knob for
setting the control mode and the setpoint and a speed control, which can be
carried out via an external PWM signal of a controller. The pump is equipped with
an LED ring to show the operating status of the pump (see chapter 10).
6.2 Functions
All functions can be set, activated or deactivated using the operating knob or via
an external PWM signal.
Settings via operating knob
Variable differential pressure (Δp-v):
The differential-pressure setpoint H is increased linearly over the permitted
volume flow range between ½H and H (Fig. 3a). The differential pressure gen-
erated by the pump is adjusted to the corresponding differential-pressure set-
point. This control mode is especially useful in heating systems with radiators,
since the flow noises at the thermostatic valves are reduced.
Constant speed
The pump is operating continuously with the preset speed (Fig. 3b)
Venting function:
During automatic venting function (10min) the pump runs alternately with high
and low speeds to help air bubble from the pump to agglomerate and to lead
direct to the venting valve of the installation.
PWM 1 mode - heating
In PWM 1 mode – heating, the pump speed is controlled depending on the PWM
input signal (Fig. 3c).
Behaviour in the event of a cable break:
If the signal cable is separated from the pump, e.g. due to a cable break, the
pump accelerates to maximum speed.
Installation and Operating Instructions Wilo-Yonos PARA RSTG
English
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