Check Valve; Actuator 24 V (0-10 V) - Helios WHSH HE 24 V (0-10 V) L Installation And Operating Instructions Manual

Installation and Operating Instructions
EN
ATTENTION
m
DANGER
Hydraulic unit WHSH HE 24V (0-10 V) L
m Risk of material damage!
Do not exceed max. operating pressures and max. operating temperatures.
Appropriate measures (e.g. safety valves) must be taken to ensure that the max. operating pressures and the max. and
min. operating temperature limits are not breached.
Assembly, initial commissioning, maintenance and repairs must be carried out by authorised specialists (heating
contractor/contract installation company). (EN 5011 part 1 and VDE 1000 part 10 for work on electrical installations).
The hydraulic unit must be thoroughly rinsed before it is placed in the piping.
The unit can be mounted in any position (horizontal, diagonal or vertical, in rising or falling sections).
However, it must be ensured that the air always flows through the valve in the direction of the arrow.
All installation locations must be checked for tightness after installation.
Always install the pump so that the motor shaft is in the horizontal position .
The connections must be retightened after installation of the pump components.
The flow is on the right side as a standard factory setting.
However, the flow and return can be switched individually on site.
The hydraulic unit allows the heating circuit to be blocked off. It consists of a block-off set with thermometers integrated
in the handles and a spacer for length adjustment in the flow line. The check valve in the return line serves to prevent
unwanted circulation.
The three-way mixer is used to control the flow temperature.
3 .1

Check valve

Depending on the operating pressure, low gravity circulation is possible in heating systems despite the check
valve when the circulating pump is deactivated . Check valves are not tight-closing flow inhibitors.
The fitting group is supplied preassembled. In case of normal operation, the positioning slot of the check valves must
be in the horizontal position.
Check valve open
Operating positions (Fig .5):
Check valve open > Operating position
Flow only possible in flow direction.
Check valve open > Filling, flushing, venting
Flow possible in both directions.
With regard to commissioning or maintenance work (filling and rinsing), the check valve must be open.
This must be returned to the operating position during heating operation.
The operating spindle of the check valve is positioned on the side of the three-way mixer housing.
3 .2

Actuator 24 V (0-10 V)

m Danger to life due to electric shock!
With regard to connection work on a live controller, there is a risk of fatal electric shock.
The pump assemblies with three-way mixers are delivered with an actuator. The actuator NR 24 of the three-way mixer
can be controlled by control units using the 24 V (0-10) output. Connection to control unit pursuant to ventilation unit
installation and operating instructions.
The rotation angle is limited to 90°. When the limit stops are reached, the actuator will be switched off electrically and
currentless. In case of control system errors, the actuator can be switched to manual operation by means of an ad-
ditional rotary switch.
3 .2 .1 Technical data
Operating voltage:
Input power:
Protection class:
Torque:
Runtime:
Manual adjustment:
Ambient temperature:
Connection cable length:
Fig .4
Check valve closed
24 V AC/DC 50/60 Hz
2.0 W
III safety extra-low voltage
10 Nm
140 s
mechanical gear disengagement
0 °C - +50 °C
2.2 m
4