4.1 Check Valve
The non-return valve prevents the tank from cooling down due to gravity circulation when the sun is
not shining. It is located between the ball valves and can therefore be removed and cleaned without
having to drain the solar fluid from the entire circuit.
Správná poloha při provozu.
If the mark is on the left, the check valve is set to the position for normal
operation. If you need to open the valve (e.g. to drain fluid from the
system), turn the check valve control with the red dot to the right.
This will deactivate the check valve function.
For correct operation of the pump station during normal use it is important
to have the check valve control always in the right position, i.e. the mark
on the left (see pic.).
!
4.2 Ball Valves
Ball valves are used to separate the pump station from the solar circuit. During servicing (including
cleaning of the check valve) there is no need to drain the fluid from the solar system. For greater rigi-
dity of the hydraulic part of the pump station, the upper ball valve is attached to the fixing back plate.
The upper ball valve is operated by a lever which is not located on the valve during operation.
A wrench or pliers must be used to operate the lower ball valve, which is part of the flow indicator.
Turning the lever or the key or pliers a quarter turn to the right closes the ball valve. It opens when
the lever is turned to the left. Before closing / opening the ball valve, it is necessary to remove the
front part of the insulation. As a result, closing the system is reserved for installation or service
technicians only. Thus, the user cannot simply close the solar circuit and cause stagnation and sub-
sequent degradation of the solar fluid.
The ball valves are equipped with apacking with two O-rings with dimensions of 8.7 x 1.8 mm that can
be easily replaced by removing the control element with stop ends and loosening the packing nut with
a # 21 wrench.
The safety valve, expansion vessel and upper filling ball valve always remain connected to the
solar thermal system, even if the ball valves are closed! For this reason, never try to separate them
from the filled solar system, as there is a risk of serious injury and damage to the solar system!
Never close the drain line of the safety valve, it must always be free for any liquid leaking from the
safety valve!
5. Accessories
Accessories (not included in supply)
Code
ETT-N heating element w. connector, 2 kW
16942
ETT-N heating element w. connector, 3 kW
16943
Connector for CSE SOL SRS1 T-E
16940
Straight compression fitting, Cu 22 x Cu 22
7629
Straight Compression Fitting Adaptor, Cu 22 x
G 3/4“ M
13695
These accessories are not included in supply. An ETT-N heating element with connector (16942 or 16943)
is needed when the pump station is to be used following the hydraulic variant 1 (chapter 7.1). The pipe
fittings (7629 and 13695) are intended for connecting a waste pipe to the safety valve.
Right position during operation.
