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THERM CONNECT
09 / 10
WOLF run around coil systems
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.
08.05.02 First test run
Tighten all clamping points of the electrical system!
During commissioning, ensure that the system is not operated beyond the limits specified in the design data.
Improper operation will result in damage to the unit for which we do not accept any warranty! During commission-
ing, as well as for the subsequent operation of the air handling unit, the information signs on the air handling unit
must be observed!
Switch on the recirculation pump, check the direction of rotation, reverse the direction of rotation electrically if nec-
essary. Run the recirculation pump to remove residual air from the control group. Check system pressure, top up if
necessary and vent again.
08.05.03 Preparations for commissioning
To ensure that commissioning runs smoothly, the following prerequisites must be met before the deadline:
• Power supply to the control cabinet is ensured
• Assembly, cabling, connection of all field devices
• Complete piping from the hydraulic station to the run around system coils (incl. shut-off/fill/drain valves
outside the hydraulic unit)
• Insulation of the complete piping and components
• Filling of the operating medium to approx. 5 bar idle pressure (see type plate!) incl. flushing and venting of
the complete system (observe glycol content according to design)
• During commissioning, you must have competent personnel at your disposal
• (Measurement and Control Technology electrical engineering, hydraulics plant engineering)
08.06 Faults and their elimination
08.06.01 Minimum pressure shutdown
If the pressure on the suction side of the system falls below the standard 1.5 bar, the system must be switched off
to protect the components of the pump. When the minimum pressure limitation is triggered, the control system
locks the system and the alarm lamp on the display lights up. In order to be able to acknowledge the fault, the rest
pressure of the system must be filled up again to the pressure value specified on the type plate. The fault can then
be acknowledged via the reset button on the control cabinet.
08.06.02 Further fault messages
All other fault messages, such as the PTC thermistor of the pump or internal fault messages of the frequency invert-
er are shown as plain text messages on the display. These can be acknowledged via the reset key after they have
been rectified.
All fault messages are forwarded to the BMS as a collective fault message.
08.07 Wiring diagram
The wiring diagram of the Therm-Connect magna unit is created specifically for the plant. It is stored in the corre-
sponding control cabinet when the system is delivered.
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