Translation of the original installation and operating instructions
12
AL-KO HYDROOPT
®
2.3
Filling and venting
The filling and venting equipment for the heat exchanger must be set up on-site.
The pipe system must be resistant to ethylene glycol (N).
The glycol content must be prepared according to the manufacturer's instructions.
Note: The glycol mixture must be renewed after a certain elapsed time according to the manufacturer's instructions.
The glycol/water mixture must already be mixed before filling. Otherwise, subsequent mixing is not guaranteed.
Feed and return flow lines must be connected according to professional standards and properly insulated.
The complete piping system must be checked for leak-tightness.
When setting up the heat recovery system, the manufacturer's information regarding the heat carrier used (brine)
must be taken into account.
To protect drinking water, avoid the discharge of heat transfer fluid into watercourses. Discharge into wastewater
must be coordinated with the regional disposal company.
2.4
Electrical connection
Make sure that the components and the connection cable at the setup location cannot be either damaged or con-
taminated by oil or other materials.
Check fuses, clamping connections, contactors, and circuit boards to ensure that they are seated firmly.
Re-secure any loose components.
Protect the pump motor against overload.
The electrical connection must be made according to the circuit diagram provided.
Warning!
The electrical connection may only be performed by a certified electrician according to statutory regulations as
well as the guidelines of the local utility company. Perform the connection according to the wiring diagram and
according to the assignment plan.
2.4.1 Cabling to the customer's control technology
The following cabling is required along with the 3-phase supply:
Coming from the customer’s building control technology:
Enable signal
potential-free contact
Power control signal
0–10 Volt analogue signal
Air volume-proportional signal
4–20 mA analogue signal usually from the supply pressure transmitter**
Demand for heating operation *
potential-free contact
Outgoing to the customer's building control technology:
Heat recovery operating message potential-free contact
Heat recovery warning message
potential-free contact
Heat recovery fault message
potential-free contact
* only optional for systems with heat input via plate heat exchanger
** mounted on the ventilation device or enclosed loose
The cabling of the control lines is connected to the terminal rows in the station switch cabinet.
