Vaillant auroTHERM VFK 145 H Installation Manual page 19

4.2.3 Installing hydraulic connections
Caution.
Leak caused by incorrect accessories.
Incorrect accessories may result in a leak in
the solar circuit and cause material damage.
▶ Only work in the solar circuit with hard
soldered connections, flat seals, compres-
sion fittings or press fittings which have
been approved by the manufacturer for
use in solar circuits and at correspond-
ingly high temperatures.
The hydraulic connections must be installed differently ac-
cording to the array configuration of the collectors (adjacent
or on top of each other).
n
4.2.3.1 Adjacent array configuration
1. Install the hydraulic connections on the collectors, as
specified in the following sections.
Note
If you connect six or more collectors one
behind the other, you must arrange the hy-
draulic connections diagonally in order to
force complete flow.
If you connect six or more collectors one
behind the other, you must arrange the hy-
draulic connections diagonally in order to
force complete flow. (→ Page 9)
Conditions: Number of collectors: 1 ... 5
▶
Connect the flow (outlet with opening for collector
sensor) at the top (1).
▶ Secure the flow with the clamp (1).
▶ Remove the red plug from the opening for the collector
sensor.
▶
Insert the VR 11 collector sensor into the opening (1).
▶
Use a cable tie to secure the VR 11 collector sensor
against slipping out.
▶ Connect the return (inlet) at the bottom (2).
▶ Secure the return with the clamp (2).
0020100571_03 auroTHERM, auroTHERM plus Installation manual
4
▶ Install the two plugs with vent openings on the other side
of the collector field at the top and bottom of the collector
((3) and (4)).
▶
Secure the two plugs with the clamps ((3) and (4)).
▶ Connect the collector flow and return to the system with
the connection pipes.
▶ Check the connections for leaks.
Conditions: Number of collectors: ≥ 6
▶ Insert the return (inlet) on one side in the lower lateral
opening (2).
1
▶
Secure the return with the clamp (2).
▶
Install the first plug with vent opening at the top lateral
opening (1).
▶ Secure the first plug with the clamp (1).
2
▶
Insert the flow (outlet with opening for collector sensor)
diagonally opposite into the upper lateral opening (4).
▶ Secure the flow with the clamp (4).
▶ Remove the red plug from the opening for the collector
sensor.
▶ Insert the VR 11 collector sensor into the opening (4).
▶
Use a cable tie to secure the VR 11 collector sensor
against slipping out.
On-roof fitting and installation 4
3
4
3
1
2
19