© Wikora GmbH
Page 11
Status: 27.04.2015
Errors excepted.
3.7 Installation of collector temperature sensor
The collector temperature sensor is to be installed at the flow of the system (hot water side). Put the sensor into the sensor
pocket as far as it will go. Apply a heat-conductive paste onto the sensor to improve the heat transfer. Screw carefully the cable
sheet on the sensor pocket.
The 1 m cable is laid with the pipe work through the roofing. The cable can be extended in the interior
(2 x 0,75²). For the connection of the temperature sensor cable with the controller the use of an over voltage protection
(protection against over voltage damages) is recommended.
If there is a lightning protection system, the collector system is to be integrated professionally. If there is no lightning protection
system, the solar flow and return are generally to be connected to the equipotential bonding. In every case, the regulations of
the local energy provider / network operator should be observed here. Electrical and lightning protection work may only be
carried out by authorized professionals.
3.8 Installation of pipe work
Install the pipe work:
on shortest way to minimize losses.
with a complete high temperature insulation (100% according to EnEv).
rising to the collector to prevent air cushions.
3.9 Hydraulic pressure test
After a successful installation, rinse the entire collector circulation with water!
Before commissioning, the collector circulation must be checked with a water pressure of 6 bar!
If the solar heating system is not commissioned immediately after installation, the collector area must be covered!
Before filling the system with heat transfer fluid, the system must be completely purged!
Open the lower plug at the collector field to purge the system.
Subsequently, the system is to be filled with solar fluid. The liquid capacity amounts to 1,15 Liter for Wikosun 2010 and 2,2
Liter for Wikosun 2510.
Important:
Please note that only a solar concentrate released by Wikora may be refilled. Solar concentrate must be prepared according to
manufacturer’s specifications with clean, ph-neutral and lime-free water. Please use an antifreeze controller to ensure the
antifreeze capacity. If another solar concentrate is applied, the warranty expires automatically. Moreover, damages that are
due to an insufficient antifreeze protection are not part of the warranty.
3.10 Regulation of flow rate (flow regulation)
The set-up of the flow rate is important for an efficient functioning of the system. The lower the flow rate chosen, the higher
the temperature difference between collector flow and return.
When setting the flow rate, it is absolutely essential to refer to the instruction manuals of the pump groups / temperature
difference controler used (scale).
Fig. 14: Scale
