CONTENT1. INTRODUCTION.41.1. Safety Requirements.41.2. Unit Types and Sizes.51.3. Unit Components and Sections.61.3.1. Filter-Fan Section.61.3.2. Heat pump section.71.3.3. Recirculation Section. 121.3.4. Cooler and Heater Sections. 131.3.5. Air Dampers. 141.3.6. Silencers. 151.3.7. Humidifier section. 151.3.8. Smoke extraction section. 161.4. Inspection Sides. 172. UNIT TRANSPORTATION. 183. MECHANICAL INSTALLATION. 213.1. Requirements for Mounting Location and Installation Base. 213.2. Inspection Area . 223.3. Door Handles and Hinges. 233.4. Connection of Sections . 243.5. Installation of External Heating/Cooling Devices. 263.6. Connection of a Condensate Drain. 293.7. Connection to Air Ducts. 303.8. Outdoor Units. 314. ELECTRICAL INSTALLATION. 334.1. Requirements for Electrical Connection . 334.2. Connection of Electrical Components. 354.3. Control Panel Installation . 394.4. Connection of Cables and Wires Between Sections. 414.5. Connecting the Unit to the Internal Computer Network or the Internet. 425. FILTERS. 446. COMMISSIONING AND INSPECTION OF THE UNIT. 456.1. Control panel C5.1. 456.2. Starting the Unit With a Computer. 476.3. Calibration of Clean Filters. 496.4. Quick Inspection. 50UAB KOMFOVENT we reserve the right to make changes without prior noticeRHP Pro2 installation manual 22-053

EN1. INTRODUCTIONThis Installation Manual is intended for professionals, qualified to install RHP Pro2 air handling units. Qualified professionals are people with sufficient professional experience and knowledge of ventilation systems and installation thereof,knowledge of electrical safety requirements and having ability to perform works without endangering themselves or others.See the KOMFOVENT website for user manuals.1.1. Safety RequirementsTo avoid misunderstandings, read this Instruction Manual carefully before installing air-handling unit.Only a qualified professional in accordance with the manufacturer’s instructions and applicable legal acts and safety requirements may install air-handling units. An air handling unit is an electrical-mechanical device that contains electrical andmoving parts, therefore, disregarding instructions of this manual will void the manufacturer’s warranty and may also causedirect damage to property or human health. Before starting any tasks, make sure that the unit is unplugged from the mains.Use caution when performing works near internal or external heaters as their surfaces may behot.Do not connect the unit to the mains unless all the external assemblies are installed completely.Do not connect the unit to the mains in case of any visible damage incurred during transportation.Do not leave foreign objects and tools inside the unit.It is forbidden to operate air-handling units in areas with potentially explosive atmospheres.Use appropriate safety equipment (gloves, goggles) when performing installation or repairworks.Heat pump system is filled with refrigerant (F-gas), therefore only qualified refrigeration systems’specialists or “Komfovent” representative can perform any mechanical/electrical works on a heatpump.Temperature of evaporating refrigerant is very low and causes severe frostbite in contact withskin, therefore use appropriate safety equipment (gloves, goggles).This symbol indicates that this product may not be disposed of with your household waste as specified in WEEE Directive(2002/96/EC) and national laws. This product should be handed over to a designated collection point or to an authorisedcollection site for recycling waste electrical and electronic equipment (EEE). Improper handling of this type of wastecould have a negative impact on the environment and human health due to potentially hazardous substances that aregenerally associated with electrical and electronic equipment. At the same time, your cooperation in the correct disposalof this product will contribute to the effective usage of natural resources. For more information about where you candrop off your waste equipment for further recycling, contact your city authorities, waste management organisations,approved WEEE scheme or your household waste disposal service.4UAB KOMFOVENT we reserve the right to make changes without prior noticeRHP Pro2 installation manual 22-05

1.2. Unit Types and SizesAn air-handling unit is a device designed to ensure good ventilation in the premises. An air- handling unit removes indoorair containing carbon dioxide, various allergens or dust, while replacing it with filtered fresh air from outside. As the outsideair is usually colder or warmer than the air within the premises, an integrated recuperator (heat exchanger) collects thermalenergy from the indoor air and transfers the majority of it to the supply air. When a recuperator is not capable of reaching adesired temperature, additional heaters or coolers may be activated.Heat exchangers and heaters (or coolers) are designed to compensate for heat/cool losses duringventilation, therefore, we do not recommend using this unit as the main heating/cooling source.The unit may fail to reach a user-defined supply air temperature when the actual temperature in thepremises differs significantly from the temperature set point, since this will lead to inefficient operation of a heat exchanger.RHP Pro2 – air handling units with a rotary heat exchanger and an integrated heat pump. Rotating wheel (rotor) of arotary heat exchanger collects heat or cold from the indoor air and transfers it to the fresh supply air. Recovered heat/coldcapacity is changed by adjusting the rotor speed. When heat recovery is not required, the wheel stops. If a heat exchangeralone is not capable of reaching a desired temperature, an integrated heat pump is activated. If heating/cooling capacity isstill too low, additional heaters or coolers may be activated.1FanAir damperFilterHeat pumprefrigerant coilHeat pumpassemblyFilterINDOORSOUTDOORSAir damperRotary heatexchangerHeat pumprefrigerant coilFanHeatersCoolersRHP Pro2 units come in several sizes. Each size is designed for a specific air volume range:Unit sizeMaximum air volume, ximum air volume may be limited according to the order, for example, if lower power fans are used or higher air volume is not required by the project requirements. For exact maximum air volume see the technical data print-out of thespecific unit.1Depends on configuration.UAB KOMFOVENT we reserve the right to make changes without prior noticeRHP Pro2 installation manual 22-055

EN1.3. Unit Components and SectionsRHP Pro2 air handling units are assembled from separate sections. Depending on the order and unit size, sections maybe pre-assembled in a factory or transported separately. Type of each section is marked with a label attached to the sectiondoor. The following are the main sections of the air handling unit. For equipment and number of sections in each unit seethe technical data print-out of the specific unit.1.3.1. Filter-Fan SectionAir handling units have two filter-fan sections. Filter contamination is measured and fan is controlled by an electroniccircuit board fitted in the same section.1.1232.3.4.5.Fig. 1. Filter-fan section1 – fan assembly with an installation frame 2 – fan control board (C5 VM),3 – bag filters, 4 – fan section label, 5 – filter section label6UAB KOMFOVENT we reserve the right to make changes without prior noticeRHP Pro2 installation manual 22-05

1.3.2. Heat pump sectionAir-handling units are equipped with an integrated heat pump operating both in heating and cooling modes. All heatpump components and a rotary heat exchanger are installed in a heat pump section. This section is also fitted with a heatpump control electronics and automation box to which many of the main electrical components are connected (see Chapter“Connection of Electrical Components”).2.123863.45758.9.10.Fig. 2. Heat pump section1 – main power switch, 2 – C5 controller main board, 3 – heat pump control electronics, 4 – rotary recuperator,5 – condensate drainage pipes, 6 – heat pump assembly, 7 – rotor motor, 8 – frequency inverter for heat pump compressor,9 – rotary recuperator marking label, 10 – heat pump section labelUAB KOMFOVENT we reserve the right to make changes without prior noticeRHP Pro2 installation manual 22-057

ENRotor wheel of a rotary recuperator is belt driven by an electric gear motor. Brush seals are installed at the perimeter ofa rotating wheel and between air flows to prevent different air flows from mixing. Recuperator section is also fitted with anautomation box to which many of the main electrical components are connected (see Chapter “Connection of ElectricalComponents”). 3. Rotary recuperator section1 – rotor wheel, 2 – automation box, 3 – automatic switch,4 – rotor wheel brush seals, 5 – rotor belt,6 – rotor gear motor, 7 – rotor section label8UAB KOMFOVENT we reserve the right to make changes without prior noticeRHP Pro2 installation manual 22-05

A heat pump assembly consists of a piping system containing refrigerant, compressor, two radiators (condenser andevaporator) and separate control electronics. If air velocity in the air handling unit is high ( 2 m/s), optional drop eliminators are installed by the condenser and/or evaporator, which prevent condensate from entering other parts of the unit or PT745LP14 5167914217113121615131018191718Fig. 4. Hydraulic circuit diagram and components of the heat pump1 – Compressor, 2 – 4-way valve (SVR), 3 – Defrost valve (SVD),4 – Low pressure transmiter (LPT), 5 – Low pressure pressostat (LP), 6 – Suction gas temperature sensor (ST),7 – Discharge gas temperature sensor (DT), 8 – Check valve, 9 – Refrigerant coil positioned in the extract airflow,10 – Refrigerant coil positioned in the supply airflow, 11 – liquid receiver, 12 – Filter-dryer,13 – Sight glass, 14 – Electronic expansion valve (EXV), 15 – High pressure transmiter (HPT),16 – High pressure pressostat (HP), 17 – condensate trays, 18 – condensate drainage pipes,19 – drop eliminatorUAB KOMFOVENT we reserve the right to make changes without prior noticeRHP Pro2 installation manual 22-059

ENDepending on the size of the unit, the heat pump unit may contain up to 3 independent circuits, each consisting of thesame components (compressor, pipeline, valves and sensors). In such units, refrigerant coils (condenser and evaporator) of aheat pump also consist of several tiers, which are independent of each other, but the amount of refrigerant in the individualcircuits is different. Heat pump model, number of circuits and exact amount of refrigerant is indicated in a label inside theunit.Air handling unit model / Vėdinimo įrenginio modelisRHP PRO 32Heat pump model / Šilumos siurblio modelisMaximum operating pressureMaksimalus darbinis slėgisP max [bar]Refrigerant / ŠaltnešisNumber of separate circuits / Atskirų kontūrų skaičiusQuantity of refrigerant / Šaltnešio kiekis42R410AmR410A [kg]15,6Hermeticaly sealed system / Hermetiška sistemaContains fluorinated greenhouse gases covered by Kyoto ProtocolSudėtyje yra Kioto protokole nurodytų fluorintų šiltnamio efektą sukeliančių dujųDO NOT VENT INTO ATMOSPHERE / NEIŠLEISTI Į APLINKĄR-410A Global Warming Potential (GWP) 1730R-410A Globalinio šiltėjimo potencialas (GWP) 1730Fig. 5. Example of a heat pump’s information labelHeat pump is activated automatically when a rotary heat exchanger is unable to reach desired temperature; and isswitched off as soon as desired temperature is reached. Frequent starting and stopping of a heat pump may damage compressor, therefore, when heating/cooling demand is low, the heat pump will continue running for some time after the settemperature has been reached. In such cases, supplied air may be slightly warmer (in heating mode) or cooler (in coolingmode) than desired; however, the extracted temperature control mode will help to reduce such temperature fluctuations(see “User Instructions”).A certain airflow is required to ensure proper operation of a heat pump, i. e. to ensure efficient heat exchange and maintain refrigerant pressure within limits. When airflow is reduced, the heat pump output is limited, and when airflow drops below minimum limit, compressor temporarily stops. Heat pump operation is resumed only when airflow increases, therefore,it is important to take these air volumes into account when designing a ventilation system or choosing additional functions:RHP Pro2size1222324252627210Minimum airflow and hysteresisto start heat-pump300 30600 60900 901200 1201600 1752250 2253000 300Minimum airflow to allow full heat pump capacity,m3/h12002400360048007000900012000UAB KOMFOVENT we reserve the right to make changes without prior noticeRHP Pro2 installation manual 22-05

Heat pump capacity100%Limited heatpump capacity20%Minimumairflow to startheat-pumpMinimumairflow to allow fullcapacityAir volumeFig. 6. Heat pump capacity limitation according airflowHeat pump is not operating when outdoor air temperature is between 15 C and 20 C, as, in this case, the rotary heatexchanger is usually capable of reaching desired air temperature.If heating/cooling demand increases when the heat pump is switched off, additional heaters/coolers are activated1.When the heat pump is running, we recommend operating air handling units with the smallest possible air volume difference between the supply and extract airflows. In case of high flow imbalances( 20%), capacity and efficiency of the heat pump decreases, therefore the compressor operates ata critical refrigerant pressure limit. This results in reduced operating life and increased probability offailure.During winter operation, when the heat pump is in heating mode, condensate on the evaporator starts freezing andforms frost. Large ice deposits block airflow in the evaporator and may damage the heat pump. Therefore, the evaporatoris automatically defrosted during winter use. When the outdoor temperature drops below zero, the heat pump automationsystem starts constantly monitoring pressure difference upstream and downstream the evaporator heat exchanger. Whencondensate accumulates in heat exchanger plates and ice starts to form, pressure increases and defrosting actions are initiated. During the defrost cycle, part of the hot refrigerant gas is directed from the compressor to the evaporator to melt forming ice crystals, therefore supply air temperature temporarily drops. Integrated electric or auxiliary heaters are switched onto compensate for this change. As soon as frost melts and pressure decreases, all the power of the heat pump is redirectedto the heating process.1Depends on configuration.UAB KOMFOVENT we reserve the right to make changes without prior noticeRHP Pro2 installation manual 22-0511

EN1.3.3. Recirculation SectionRecirculation section is intended for mixing extract and supply air for heating or cooling thereof by reducing energyconsumption of heaters/coolers.1.123.2.Fig. 7. Recirculation section1 – air mixing damper, 2 – damper actuator, 3 – recirculation section label12UAB KOMFOVENT we reserve the right to make changes without prior noticeRHP Pro2 installation manual 22-05

1.3.4. Cooler and Heater SectionsCooler section is fitted with water or direct evaporation (DX) coolers as well as combined heater/cooler heat exchangers.Cooling air causes condensation, therefore, a condensate tray is installed under a heat exchanger. If air velocity in the airhandling unit is high ( 2 m/s), an optional drop eliminator is installed, which prevents condensate from entering other partsof the unit or air ducts.2.1.1233.4.Fig. 8. Cooler section1 – drop eliminator, 2 – coil for water/refrigerant 3 – condensate tray,4 – cooler section labelDepending on the order, electric or water heaters may be selected. An electric heater section is fitted with heater controlelectronics and the main circuit breaker (see Chapter “Requirements for Electrical Connection”). A water heater is fitted witha return water temperature sensor, which protects the heat exchanger against freezing. Sensor installation procedure isdescribed in Chapter “Installation of External Heating/Cooling Devices”.UAB KOMFOVENT we reserve the right to make changes without prior noticeRHP Pro2 installation manual 22-0513

EN1.2.OFFONFig. 9. Heater section1 – electric heater section and label, 2 – water heater section and label1.3.5. Air DampersAir dampers are mounted on the outside of the unit and are fastened with self-tapping screws. Air dampers are designedto isolate the unit and to protect against air flows and draughts when the unit is stopped. Damper blades are closed/openedwith an electric actuator (24 V AC), the power and torque of which is selected according to a damper size. Rectangular airducts may be connected directly to dampers (see Chapter “Connection of Air Ducts”). For outdoor installation, air damperswith electric actuators must be protected against environmental influences with special covers or other structures.1.122.Fig. 10. Air closing dampers1 – air damper, 2 – electric damper actuator14UAB KOMFOVENT we reserve the right to make changes without prior noticeRHP Pro2 installation manual 22-05

1.3.6. SilencersNoise suppressor sections are intended for reducing noise generated by an air handling unit and air flows. Depending onthe unit type and location of a silencer section, suppressor sections may be separate for each air flow (e.g., for supply air only)or double, intended for both air flows. Silencer section is equipped with noise absorbing partitions which can be removedand cleaned during inspection works. Silencer section may also be equipped with an optional compact filter.1.2.1Fig. 11. Noise suppressor section1 – removable noise absorbing partitions, 2 – silencer section label1.3.7. Humidifier sectionRHP Pro2 units that was ordered with humidity function can control external steam humidifier. Humidifier generatessteam that reaches steam distributors located inside of the AHU in the supply airflow. A drop eliminator is placed inside thehumidifier section to prevent excess condensate from entering the ducts, so an additional drainage pipe must be connectedto this section (see section “Connection of a condensate drain”).In order for the humidifier to operate correctly, humidity sensors must be installed and connected to the C5 controllerboard (See “Electrical installation”). Humidity control function (HUM) can maintain humidity of the supply or of the indoorair – more information about this function you can find in the “RHP Pro2 user manual”In most cases (depending on the manufacturer) the humidifier must be installed lower than humidification section in theair handling unit, thus steam hoses will be installed with a slope towards humidifier. Maximum length of the steam hosesis also limited, thus be sure to consider these aspects when choosing the installation location of the air handling unit orhumidifier.5.3124Fig. 12. Humidifier section1 – steam distributers, 2 – steam hose connection pipes, 3 – inspection window, 4 – condensate drain pipe,5 – humidifier section labelInstall the humidifier and connect it to the AHU according to the humidifier manufacturer’sinstructions.UAB KOMFOVENT we reserve the right to make changes without prior noticeRHP Pro2 installation manual 22-0515

EN1.3.8. Smoke extraction sectionThe smoke extraction section is used to direct the gases and smoke generated by fire in the building, directly to theexhaust air fan, which throws them out, bypassing the AHU filters and the heat exchanger. Smoke ducts of the building areconnected to a smoke bypass damper, which is mounted at the top or back of the section.The damper and the extract air fan are controlled by a smoke bypass function, which is activated when a signal from thebuilding’s fire system is received (see user manual). During function operation, the thermal protection of the fans is disconnected to prevent them from stopping due to the high temperatures1.43331.2.5.6.Fig. 13. Smoke extraction section1 – smoke extraction section with damper on the top, 2 – smoke extraction section with damper at the back,3 – smoke by-pass damper, 4 – damper actuator, 5 – section label when damper is on the top,6 – section label when damper is at the back1In smoke extraction mode, fan assembly and control electronics will maintain its operational and mechanical stability for at least 60 min. at 70 C ofextracted air/smoke temperature.16UAB KOMFOVENT we reserve the right to make changes without prior noticeRHP Pro2 installation manual 22-05

1.4. Inspection SidesDepending on the installation position and connection of air ducts, RHP Pro2 air handling units are available in four inspection sides. Inspection side is determined by a supply air duct (SUP) position:L1 Air duct for supply air connected on the left bottom side of the unitEHAETAODASUPL2 Air duct for supply air connected on the left upper side of the unitSUPODAETAEHAR1 Air duct for supply air connected on the right bottom side of the unitEHAETAODASUPR2 Air duct for supply air connected on the right upper side of the unitODAEHAUAB KOMFOVENT we reserve the right to make changes without prior noticeRHP Pro2 installation manual 22-05SUPETAODAoutdoor intake airSUPair supplied to the premisesETAair extracted from the premisesEHAoutdoor exhaust air17

EN2. UNIT TRANSPORTATIONUnits must be transported and stored in their original packaging. During transportation, units must be properly fixed andadditionally protected against possible mechanical damage, rain or snow. Only an employee qualified to operate a forklifttruck or crane and familiar with the principles of cargo lifting and safety requirements, must perform unloading or liftingoperations. When a forklift is used for lifting or transporting the unit, forks must be long enough to prevent the device fromtipping over or to avoid mechanical damage to its bottom part.L LFig. 14. Unit transportation using a forklift or a trolleyIndividual sections of the unit shall be lifted with an installation frame. Pipes should be inserted through the mountingframe into designated openings and lifting ropes or belts fixed. It must be ensured that belts will not disconnect or pipes willnot be pulled out of the frame when lifting.Max. 60 Max. 60 Fig. 15. Lifting of individual sections11Lifting means (pipes, belts, ropes, traverses) are not included.18UAB KOMFOVENT we reserve the right to make changes without prior noticeRHP Pro2 installation manual 22-05

If fully assembled AHU will be lifted, not each section separately, it must be done using additional reinforced mountingframe. Each section must be placed on to the reinforced frame and connected with other sections as described in paragraph„Connection of sections“. Sections are fixed to the reinforced frame using M10 bolts through the holes instead of adjustablefeet. Reinforced mounting frame has special retractable lifting holders, for fixing belts or ropes.AAA-AMax. 60 LLFig. 16. Lifting AHU fully assembled onto reinforced mounting frame11Lifting means (pipes, belts, ropes, traverses) are not included.UAB KOMFOVENT we reserve the right to make changes without prior noticeRHP Pro2 installation manual 22-0519

EN 20Air handling units are heavy, therefore care must be taken during lifting, carrying or movingoperations. Use personal protection equipment, do not stand under a suspended unit or a partthereof.Only an employee qualified to operate a forklift truck or crane and familiar with the principles ofcargo lifting and safety requirements, must perform unloading or lifting operations.It must be ensured that the casing is not crushed or otherwise damaged by straps or ropes during lifting operations. Use of special supporting structures (traverses) is recommended.When lifting the unit or section thereof, note that their center of gravity may differ from the geometric center of the load

Maximum operating pressure Maksimalus darbinis slėgis P max [bar] 42 Refrigerant / Šaltnešis R410A . R-410A Global Warming Potential (GWP) 1730 R-410A Globalinio šiltėjimo potencialas (GWP) 1730 DO NOT VENT INTO ATMOSPHERE / NEIŠLEISTI Į APLINKĄ Fig. 5.