Helios WHSH HE 24 V 0-10 V Installation And Operating Instructions Manual page 19

Installation and Operating Instructions
Hydraulic Unit WHSH HE 24V (0-10V)
1. Remove the front thermal casing insulation (1) and the insert block (2)
2. Loosen screw (7) on wall bracket (6)
3. Remove the flow (3) and return line (4) of the assembly from the rear casing insulation (5)
1
4. Determine the position of the assembly on the wall and secure the wall bracket with the supplied screws
TIP: Use the rear insulation as a drill template!
5. Place rear insulation (5) on wall bracket, mount flow and return line in the wall bracket and secure against turning
with the locking plate (8) and screw.
6. Once the work has been completed, carry out the water connections
7. Replace insert block (2) and front casing insulation (1)
6. Move anti-rotation device (7) to the other side
– Gravity lock
The gravity lock prevents the natural and unwanted circulation
of the heating water (heating circuit) when the pump is switched
off (opening pressure approximately 20 mbar).
Operating positions (Fig. 2):
Check valve closed > Operating position
Flow only possible in flow direction.
Check valve open > Filling, flushing, venting
Flow is possible in both directions.
During heating operation, the gravity lock must be set to the
operating position.
2 4
3
3 5 6 7 8
Check valve
Sperrventil
Open
Closed
geschlossen geöffnet
Operation Filling/
venting/
flushing
EN
Fig. 1
Fig. 2