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THERM CONNECT defrost
07
WOLF run around coil systems
07.04 BMS connection
Control from external AHU control
1 x release contacts from external AHU control cabinet as normally open contact
1 x power request 0-10 V DC
Contacts to external AHU control
1 x operating message potential free normally open contact for 230 V
1 x collective fault signal floating NC contact for 230 V
07.05 Commissioning
07.05.01 Filling the system
Check before filling the system
Before filling the hydraulic control group, check the following parameters
• Proper installation of all parts
• Vent valve installed at the highest point of piping
• Flow direction at valves, pumps, etc.
• Installation position of valves, etc.
• Connection of heaters, coolers in counterflow principle (otherwise considerable power losses will occur!)
• Tight fit of all connections (screwed connections, flanges, etc.)
• Smooth running of valves, slide valves, actuators
• Hydraulic lines must be flushed and cleaned
Attention! When filling and venting the system, there is a risk of injury due to
• Escaping pressure jet
• Scalding with hot heating media
• Burning in case of skin contact with antifreeze additives
Filling and bleeding
Fill hydraulic control group slowly - vent carefully. During the filling process, open the venting valve. During the fill-
ing process, check all connection points for leaks, eliminate them if necessary. After reaching the system pressure on
the medium side, close the venting valve.
Attention
When opening the venting device of the run around coil system, the plant must be switched off. Secure the main
switch! The liquids, e.g. water-glycol mixture (-20°C to 40°C), are under pressure and can thus escape abruptly.
Personal protective equipment such as suitable goggles and gloves must be worn or the manufacturer's instructions
followed.
07.05.02 First test run
Tighten all clamping points of the electrical system!
During commissioning, ensure that the plant is not operated beyond the limits specified in the design data.
Improper operation will result in damage to the unit for which we cannot accept any liability! During commission-
ing, as well as for the subsequent operation of the AHU, the information signs on the AHU must be observed!
16
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