VRF-AHU Kit Installation and Operating Manual
About this Installation and Operating Manual The texts, illustrations, diagrams and examples contained in this manual are intended solely for the purpose of explaining the installation, operation, application and programming of the VRF-AHU Kit. All safety instructions and protective measures relevant for your particular application are to be observed when planning, installing, setting up, maintaining, repairing and testing these devices.
Content 1 Safety instructions 1.1 Symbols used .............................................................................................................. 5 1.2 Disposal notes ............................................................................................................. 5 1.3 General Safety Instructions ......................................................................................... 6 1.4 Notes on local selection ...........................................................
6 Electrical connenction 6.1 Safety instructions ....................................................................................................... 13 6.2 Design of voltage carring lines and fuses ................................................................... 13 6.3 Terminal assignment of electrical connections ........................................................... 14 6.4 Connection of temperature sensors ............................................................................
1 Safety instructions ■ ■ ■ ■ 1.1 All assembly, electrical and refrigeration work must be carried out according to national and regional laws, regulations and regulations. All safety instructions must be carefully read and understood before beginning work. The safety instructions given here contain important information. Carefully follow all safety instructions. This manual must be handed over to the user of the system for future use and stored.
1.3 General safety instructions WARNING! This equipment may be installed and connected only by specially trained personnel familiar with the electrical and air-conditioning safety standards. Faulty installation and connection work, repairs and maintenance can lead to electric shock, short circuit, leakage, fire hazard or damage to property. All installation and connection instructions in this manual must be followed.
The refrigerant lines can become very hot during operation. Never route electrical cables to the refrigerant piping without heat insulation between the pipe and the electrical cable. The insulation layer of the electrical cables can melt when ignored and lead to electric shock, short circuit and fire hazard. WARNING! Take special measures against the dangers caused by strong winds, hurricanes and earthquakes in affected areas. Damaged or broken equipment may cause injury or property damage.
1.4 Notes on location selection Please note the following when selecting a location: ■ Avoid a location where highly flammable materials are handled. ■ Avoid a location where flammable, aggressive or corrosive gases may be generated, stored or leaked, or where volatile flammable materials are treated.
2.3 Inspection and handling during delivery and assembly ■ Check the packaging for damage when it is delivered and report any damage immediately to your sales partner. ■ Observe the following symbols and instructions on the packaging: This way up: The pack must always be transported, folded and stored so that the arrows always point upwards. Rolls, flaps, heavy tipping or edges as well as other forms of treatment are to be omitted.
4 Installation and dimensions Illustration 4-1 Correct Installation: Wrong Installation: ■ The VRF-AHU Kit is not weather resistant and is only suitable for indoor installation. If the controller box needs to be installed in outdoor areas, contact your Systemair sales representative previously. ■ The VRF-AHU Kit may only be mounted vertically. ■ Horizontal installation leads to malfunctions and loss of performance.
5 Refrigerant pipe connection WARNING! In case of refrigerant leakage during installation, the affected environment must be immediately ventilated. Risk of death! If refrigerant is present on an open fire, toxic compounds may form. After completion of the refrigeration work, a leak test must be carried out to prevent leaks. Risk of death! If refrigerants are found on heat sources such as heaters, ovens or stoves, poisonous compounds can occur.
5.3 Piping material and connection dimensions 5.3.1 Material specifications Only copper pipes in accordance with DIN EN 12735-1 (copper and copper alloys, seamless round pipes made of copper for refrigeration and air conditioning, part 1: pipes for piping systems) may be used for the refrigeration piping.
6 Electrical connection 6.1 Safety instructions CAUTION! ■ This device may only be installed and connected by specially trained personnel who is familiar with the safety standards of electrical engineering. The design of the electrical cables must comply with local and national legal requirements. An all-current-sensitive residual current circuit breaker must be provided in the supply line. In the supply line, use an all-pole disconnector with at least 3 mm contact spacing and use only fixed wiring.
6.3 Terminal assignment of electrical connections Observe the information on the VRF-AHU Kit label and wire it according to the descriptions in the following illustrations. Notes • Ensure that the device and network addresses are set correctly before commissioning. • Use shielded, flexible 2-core cables and ground the shield. Illustration 6-1 N, L (CN1) Power supply connection terminal 230 V, 1 phase, 50 Hz. ALARM (CN9) Digital output 5 A – 250 VAC or 5 A – 30 VDC.
HEAT (CN4) Digital input. When terminals are closed, the unit is operating in heating mode and „HEAT“ LED lights up. Note: Heating mode has priority. If both COOL and HEAT terminals are closed, unit will run in heating mode. 0-10 V (CN3) Analog input terminal to control outdoor unit capacity. Capacity steps: 0 - 0.5 V, 0 % capacity (unit stopped) 0.5 - 1.5 V, 10 % capacity (LED display digit 1) 1.5 - 2.5 V, 20 % capacity (LED display digit 2) ... 9.5 - 10.
6.4 Connection of temperature sensors Observe the VRF-AHU Kit control board and connect the temperature sensors as shown in Figure 6-2. T2 T2B indoor evaporator intermediate temperature sensor indoor evaporator outlet sensor Abbildung 6-2 Notes • All units are equipped one main control panel, the temperature sensor T2 and T2B must be connected to the main control panel before first powered on.
7 Function and settings On the control board of the VRF-AHU Kit options for individual settings are available, which are described in more detail below. Note After completing all settings, turn off the power and then turn it on again. The new settings are accepted and applied by the controller. Without voltage reset, the new settings will not take effect. 7.1 Capacity setting CAUTION The settings may only be made by authorized persons.
7.
(3) A maximum number of indoor units may be connected to each outdoor unit, depending on the respective outdoor unit. The calculation also needs to include the virtual indoor units. A controller box with the nominal power "D" (56 kW), a real address and four virtual addresses is recognized by the outdoor unit as four indoor units. (4) An integration of the VRF-AHU Kit in a central control (superordinate control) via X, Y, E bus into the system is not possible.
