Liquid-coupled heat exchanger LQRT ECONET

Transcription

1 ECONET includes the following: 1. Functional components with heat exchanger on the supply air side and the exhaust air side. 2. Pump unit (not installed). 3. Control unit for liquid circuit (not installed). 4. Frequency changer for pump motor (not installed). The control unit, frequency changer and pump unit are supplied on a common pallet. Control unit and frequency changer is installed as shown in the Figure on the unit panel or on a wall. The pump unit is intended for installation directly to the heat exchanger on the supply air side. 1 Pump unit (2) consists of: - Unit with pump, pipes, valves and connections for sensors (pressure and temperature). - Supplied components: - Thermometer () - Differential pressure sensor with connection () - Manometer with contact function () - Manometer () Control unit (3) consists of: - Cabinet with installed equipment as shown in the component list (see wiring diagram). - Supplied components: - Temperature sensor (), () - Actuator for () Frequency converter (4): (2) External energy External controller (Unit controller) (3) + Fig P2 +P1 Sensor, external controller Plug on delivery. (4) Fig. 2 Fläkt Woods 9153 GB Specifications are subject to alteration without notice

2 Installation of pump unit Size The pump unit is placed on a frame constructed on-site.a drip-tray, constructed on-site, is placed under the pump unit. Pipe and component connection Pump unit and components are connected as shown in the diagram: Right-hand model Fig. 3 Drip-tray and pump frame (not included) Installation of pipe system Connection to the pipe system must be performed by a pipe installation contractor. Installation includes: - Installation of the pump bracket - Connection between the and the side - External connection - Installation of all sensors (connection of pipes for ) - Expansion vessel - Connection for charging - Charging of liquid and purging Purging of the pump before starting. - Water trap Fig. 4 Left-hand model Pressure sensor is marked with P1 and P2. Connect as shown in Figure 2. Valves to sensor must be closed and the overflow valve open when filling the system. Fig. 5 Fläkt Woods 9153 GB Specifications are subject to alteration without notice

3 The external coupling is dependent on whether one or more units coupled in parallel are included. Outer controls (Unit controls) Single unit (closed circuit) The cut-off valve which connects the external liquid circuit in parallel with the pump circuit must be closed. Three pipes can be used for supplementary cooling 2). Cut-off valves are installed on the external connection. Sensor, outer controls Plug on delivery 2) Fig. 6 Marking of each pipe connection 1 Värme/Kyla IN Heating/Cooling IN Lämmitys/Jäähdytys MENO Frånluftsbatteri IN Exhaust air coil IN Poistoilmapatteri MENO 4 P2 + P1 Tilluftsbatteri Supply air coil Tuloilmapatteri IN IN MENO 2 Frånluftsbatteri Exhaust air coil Poistoilmapatteri 5 UT OUT PALUU Fig. 7 Tilluftsbatteri Supply air coil Tuloilmapatteri 3 UT OUT PALUU 6 Värme/Kyla UT Heating/Cooling OUT Lämmitys/Jäähdytys PALUU Fläkt Woods 9153 GB Specifications are subject to alteration without notice

4 Multiple units (open circuit) The cut-off valve which connects the external liquid circuit in parallel with the pump circuit must be open. Purging of heat exchanger Manual purging for LQRT. Three pipes can be used for supplementary cooling 2). Cut-off valves are installed on the external connection. 2) Manual purging valve LQAZ-18 Fig. 10 P2 + P1 Manual purging valve LQAZ-18 Fig. 8 Fig. 11 Nipple LQAZ-20-1 Liquid charging and purging. Fig. 9 The purging, safety valve and drain connections are routed to the connection vessel next to the unit. Fläkt Woods 9153 GB Specifications are subject to alteration without notice

5 Condensation drainage The heat exchangers are provided with a ø 32 drainage connection for the connection of a water trap with a trap depth of at least 100 mm. Use water trap LQAZ-08. Start-up Electrical connection of the pump must be carried out. Fig. 12 Water trap LQAZ Mix ordinary water and frost protection fluid to the stipulated concentration. Then allow the mixture to stand for at least 24 hours in the open mixing vessel for air elimination. 2. Mark the system with signs indicating the flow, type of frost protection and concentration. 3. Connect the coils, taking note of any marking in respect of counter-flow connection. 4. Fill the system as soon as possible with the help of the separate pump. The system should have a positive pressure of 1.0 bar. 5. Pressure sensor (). When charging with liquid, the by-pass valve must be open and the cut-off valves must be closed. Emptying The heat exchanger cannot be emptied entirely, but the liquid must be provided with a frost protection agent when the risk of frost is present. Fins Any deformations in the fins is adjusted with fin comb QLAZ Check for any leakage and reseal if necessary. 7. The circulation pump must be purged without exception, using its own purging valve, before starting! 8. Start the system s circulation pump and purge the system carefully. The pump is started via the manual position on the frequency converter. Set the converter to a relatively low frequency, ca 30 Hz. 9. Taking into service (). Open the shut-off valves and eliminate any air that is present. Shut the by-pass valve. Fig Check the positive pressure of the system and fill up if necessary. Check that no air is present in the charging equipment. Fin comb QLAZ Fill the water trap. 12. Recheck the system pressure after about a week. IORTANT! Protective gloves must be worn when using the fin comb. Electrical and control installation The electrical diagram for connection of the pump motor, frequency converter and control unit for the pump circuit is supplied with the control unit (in the cabinet). Fläkt Woods 9153 GB Specifications are subject to alteration without notice