Komfovent RHP Pro2 User manual

INSTALLATION
MANUAL EN
RHP Pro2

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CONTENT
1. INTRODUCTION ...........................................................................................................................................................................................................3
1.1. Safety Requirements...........................................................................................................................................................................................3
1.2. Unit Types and Sizes............................................................................................................................................................................................4
1.3. Unit Components and Sections ......................................................................................................................................................................5
1.3.1. Filter-Fan Section ......................................................................................................................................................................................5
1.3.2. Heat pump section...................................................................................................................................................................................6
1.3.3. Recirculation Section............................................................................................................................................................................10
1.3.4. Cooler and Heater Sections................................................................................................................................................................11
1.3.5. Air Dampers.............................................................................................................................................................................................12
1.3.6. Silencers ....................................................................................................................................................................................................13
1.3.7. Humidier section.................................................................................................................................................................................13
1.3.8. Smoke extraction section...................................................................................................................................................................14
1.4. Inspection Sides.................................................................................................................................................................................................15
2. UNIT TRANSPORTATION AND STORAGE......................................................................................................................................................16
3. MECHANICAL INSTALLATION............................................................................................................................................................................19
3.1. Requirements for Mounting Location and Installation Base.............................................................................................................19
3.2. Inspection Area .................................................................................................................................................................................................20
3.3. Door Handles and Hinges ..............................................................................................................................................................................21
3.4. Connection of Sections ..................................................................................................................................................................................22
3.5. Installation of External Heating/Cooling Devices.................................................................................................................................. 24
3.6. Connection of a Condensate Drain.............................................................................................................................................................27
3.7. Connection to Air Ducts..................................................................................................................................................................................28
3.8. Outdoor Units.....................................................................................................................................................................................................29
4. ELECTRICAL INSTALLATION ...............................................................................................................................................................................32
4.1. Requirements for Electrical Connection ..................................................................................................................................................32
4.2. Connection of Electrical Components.......................................................................................................................................................35
4.3. Control Panel Installation ..............................................................................................................................................................................40
4.4. Connection of Cables and Wires Between Sections .............................................................................................................................41
4.5. Connecting the Unit to the Internal Computer Network or the Internet ..................................................................................... 42
5. FILTERS ..........................................................................................................................................................................................................................44
6. COMMISSIONING AND INSPECTION OF THE UNIT.................................................................................................................................45
6.1. Control panel C5.1.............................................................................................................................................................................................45
6.2. Starting the Unit With a Computer .............................................................................................................................................................47
6.3. Calibration of Clean Filters .............................................................................................................................................................................50
6.4. Quick Inspection................................................................................................................................................................................................ 51

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1. INTRODUCTION
This Installation Manual is intended for professionals, qualied to install RHP Pro2 air handling units. Qualied profes-
sionals are people with sucient 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 Requirements
To avoid misunderstandings, read this Instruction Manual carefully before installing air-handling unit.
Only a qualied professional in accordance with the manufacturer’s instructions and applicable legal acts and safety re-
quirements may install air-handling units. An air handling unit is an electrical-mechanical device that contains electrical and
moving parts, therefore, disregarding instructions of this manual will void the manufacturer’s warranty and may also cause
direct 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 be hot.
• 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 repair works.
• Heat pump system is lled with refrigerant (F-gas), therefore only qualied refrigeration systems’
specialists or “Komfovent” representative can perform any mechanical/electrical works on a heat
pump.
• Temperature of evaporating refrigerant is very low and causes severe frostbite in contact with skin,
therefore use appropriate safety equipment (gloves, goggles).
This symbol indicates that this product may not be disposed of with your household waste as specied in WEEE Directive
(2002/96/EC) and national laws. This product should be handed over to a designated collection point or to an authorised
collection site for recycling waste electrical and electronic equipment (EEE). Improper handling of this type of waste
could have a negative impact on the environment and human health due to potentially hazardous substances that are
generally associated with electrical and electronic equipment. At the same time, your cooperation in the correct disposal
of this product will contribute to the eective usage of natural resources. For more information about where you can
drop o your waste equipment for further recycling, contact your city authorities, waste management organisations,
approved WEEE scheme or your household waste disposal service.

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1.2. Unit Types and Sizes
An air-handling unit is a device designed to ensure good ventilation in the premises. An air- handling unit removes indoor
air containing carbon dioxide, various allergens or dust, while replacing it with ltered fresh air from outside. As the outside
air is usually colder or warmer than the air within the premises, an integrated recuperator (heat exchanger) collects thermal
energy from the indoor air and transfers the majority of it to the supply air. When a recuperator is not capable of reaching a
desired temperature, additional heaters or coolers may be activated.
Heat exchangers and heaters (or coolers) are designed to compensate for heat/cool losses during ven-
tilation, therefore, we do not recommend using this unit as the main heating/cooling source. The unit
may fail to reach a user-dened supply air temperature when the actual temperature in the premises
diers signicantly from the temperature set point, since this will lead to inecient operation of a heat
exchanger.
RHP Pro2 – air handling units with a rotary heat exchanger and an integrated heat pump. Rotating wheel (rotor) of a
rotary heat exchanger collects heat or cold from the indoor air and transfers it to the fresh supply air. Recovered heat/cold
capacity is changed by adjusting the rotor speed. When heat recovery is not required, the wheel stops. If a heat exchanger
alone is not capable of reaching a desired temperature, an integrated heat pump is activated. If heating/cooling capacity is
still too low, additional heaters or coolers may be activated.1
OUTDOORS
INDOORS
Air damper
Air damper
Filter
Filter
Fan
Fan Heaters Coolers
Rotary heat
exchanger
Heat pump
assembly
Heat pump
refrigerant coil
Heat pump
refrigerant coil
RHP Pro2 units come in several sizes. Each size is designed for a specic air volume range:
Unit size Maximum air volume, m3/h
12 2650
22 3900
32 5150
42 6800
52 9250
62 11300
72 15700
Maximum air volume may be limited according to the order, for example, if lower power fans are used or higher air vo-
lume is not required by the project requirements. For exact maximum air volume see the technical data print-out of the
specic unit.
1 Depends on conguration.

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1.3. Unit Components and Sections
RHP Pro2 air handling units are assembled from separate sections. Depending on the order and unit size, sections may
be pre-assembled in a factory or transported separately. Type of each section is marked with a label attached to the section
door. The following are the main sections of the air handling unit. For equipment and number of sections in each unit see
the technical data print-out of the specic unit.
1.3.1. Filter-Fan Section
Air handling units have two lter-fan sections. Filter contamination is measured and fan is controlled by an electronic
circuit board tted in the same section.
1
2
3
3.
2.
1.
4. 5.
Fig. 1. Filter-fan section
1 – fan assembly with an installation frame 2 – fan control board (C5_VM),
3 – bag lters, 4 – fan section label, 5 – lter section label

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1.3.2. Heat pump section
Air-handling units are equipped with an integrated heat pump operating both in heating and cooling modes. All heat
pump components and a rotary heat exchanger are installed in a heat pump section. This section is also tted with a heat
pump control electronics and automation box to which many of the main electrical components are connected (see Chapter
“Connection of Electrical Components”).
1
5
2
4
3
8
6
7
5
9. 10.
8.
3.
2.
Fig. 2. Heat pump section
1 – 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 label

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Rotor wheel of a rotary recuperator is belt driven by an electric gear motor. Brush seals are installed at the perimeter of
a rotating wheel and between air ows to prevent dierent air ows from mixing. Recuperator section is also tted with an
automation box to which many of the main electrical components are connected (see Chapter “Connection of Electrical
Components”).
7.
1
4
2
3
4
5
6
1.
5.
6.
3.
Fig. 3. Rotary recuperator section
1 – rotor wheel, 2 – automation box, 3 – automatic switch,
4 – rotor wheel brush seals, 5 – rotor belt,
6 – rotor gear motor, 7 – rotor section label

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A heat pump assembly consists of a piping system containing refrigerant, compressor, two radiators (condenser and
evaporator) and separate control electronics. If air velocity in the air handling unit is high (> 2 m/s), optional drop elimina-
tors are installed by the condenser and/or evaporator, which prevent condensate from entering other parts of the unit or air
ducts.
9
17
18
10
17
18
19
2
11
7
1
14
6
54
3
12
15
16
13
LPT
SVD SVR
LP
ST
6
4
5
DT
7
2
1
3
9
16 15
10
HPTHP
EXV
13 14
1211
8
88
8
Fig. 4. Hydraulic circuit diagram and components of the heat pump
1 – 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 airow,
10 – Refrigerant coil positioned in the supply airow, 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 eliminator

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Depending on the size of the unit, the heat pump unit may contain up to 3 independent circuits, each consisting of the
same components (compressor, pipeline, valves and sensors). In such units, refrigerant coils (condenser and evaporator) of a
heat pump also consist of several tiers, which are independent of each other, but the amount of refrigerant in the individual
circuits is dierent. Heat pump model, number of circuits and exact amount of refrigerant is indicated in a label inside the
unit.
Air handling unit model / Vėdinimo įrenginio modelis RHP PRO 32
Heat pump model / Šilumos siurblio modelis
Maximum operating pressure
Maksimalus darbinis slėgis Pmax [bar] 42
Refrigerant / Šaltnešis R410A
Number of separate circuits / Atskirų kontūrų skaičius 1
Quantity of refrigerant / Šaltnešio kiekis mR410A [kg] 5,6
Hermeticaly sealed system / Hermetiška sistema
Contains uorinated greenhouse gases covered by Kyoto Protocol
Sudėtyje yra Kioto protokole nurodytų uorintų šiltnamio efektą sukeliančių dujų
R-410A Global Warming Potential (GWP)=1730
R-410A Globalinio šiltėjimo potencialas (GWP)=1730
DO NOT VENT INTO ATMOSPHERE / NEIŠLEISTI Į APLINKĄ
Fig. 5. Example of a heat pump’s information label
Heat pump is activated automatically when a rotary heat exchanger is unable to reach desired temperature; and is
switched o as soon as desired temperature is reached. Frequent starting and stopping of a heat pump may damage com-
pressor, therefore, when heating/cooling demand is low, the heat pump will continue running for some time after the set
temperature has been reached. In such cases, supplied air may be slightly warmer (in heating mode) or cooler (in cooling
mode) than desired; however, the extracted temperature control mode will help to reduce such temperature uctuations
(see “User Instructions”).
A certain airow is required to ensure proper operation of a heat pump, i. e. to ensure ecient heat exchange and main-
tain refrigerant pressure within limits. When airow is reduced, the heat pump output is limited. Heat pump is not operating
when outdoor air temperature is between 15°C and 20°C, as, in this case, the rotary heat exchanger is usually capable of
reaching desired air temperature.
If heating/cooling demand increases when the heat pump is switched o, additional heaters/coolers are activated1.
When the heat pump is running, we recommend operating air handling units with the smallest possible
air volume dierence between the supply and extract airows. In case of high ow imbalances (>20%),
capacity and eciency of the heat pump decreases, therefore the compressor operates at a critical re-
frigerant pressure limit. This results in reduced operating life and increased probability of failure.
1 Depends on conguration.

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During winter operation, when the heat pump is in heating mode, condensate on the evaporator starts freezing and
forms frost. Large ice deposits block airow in the evaporator and may damage the heat pump. Therefore, the evaporator
is automatically defrosted during winter use. When the outdoor temperature drops below zero, the heat pump automation
system starts constantly monitoring pressure dierence upstream and downstream the evaporator heat exchanger. When
condensate accumulates in heat exchanger plates and ice starts to form, pressure increases and defrosting actions are initi-
ated. During the defrost cycle, part of the hot refrigerant gas is directed from the compressor to the evaporator to melt form-
ing ice crystals, therefore supply air temperature temporarily drops. Integrated electric or auxiliary heaters are switched on
to compensate for this change. As soon as frost melts and pressure decreases, all the power of the heat pump is redirected
to the heating process.
1.3.3. Recirculation Section
Recirculation section is intended for mixing extract and supply air for heating or cooling thereof by reducing energy
consumption of heaters/coolers.
1
2
1.
2.
3.
Fig. 6. Recirculation section
1 – air mixing damper, 2 – damper actuator, 3 – recirculation section label

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1.3.4. Cooler and Heater Sections
Cooler section is tted 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 air
handling unit is high (> 2 m/s), an optional drop eliminator is installed, which prevents condensate from entering other parts
of the unit or air ducts.
1
2
3
1.2.
3.
4.
Fig. 7. Cooler section
1 – drop eliminator, 2 – coil for water/refrigerant 3 – condensate tray,
4 – cooler section label
Depending on the order, electric or water heaters may be selected. An electric heater section is tted with heater control
electronics and the main circuit breaker (see Chapter “Requirements for Electrical Connection”). A water heater is tted with
a return water temperature sensor, which protects the heat exchanger against freezing. Sensor installation procedure is
described in Chapter “Installation of External Heating/Cooling Devices”.

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OFF
ON
2.1.
Fig. 8. Heater section
1 – electric heater section and label, 2 – water heater section and label
1.3.5. Air Dampers
Air dampers are mounted on the outside of the unit and are fastened with self-tapping screws. Air dampers are designed
to isolate the unit and to protect against air ows and draughts when the unit is stopped. Damper blades are closed/opened
with an electric actuator (24 V AC), the power and torque of which is selected according to a damper size. Rectangular air
ducts may be connected directly to dampers (see Chapter “Connection of Air Ducts”). For outdoor installation, air dampers
with electric actuators must be protected against environmental inuences with special covers or other structures.
1.
2.
1
2
Fig. 9. Air closing dampers
1 – air damper, 2 – electric damper actuator

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1.3.6. Silencers
Noise suppressor sections are intended for reducing noise generated by an air handling unit and air ows. Depending on
the unit type and location of a silencer section, suppressor sections may be separate for each air ow (e.g., for supply air only)
or double, intended for both air ows. Silencer section is equipped with noise absorbing partitions which can be removed
and cleaned during inspection works. Silencer section may also be equipped with an optional compact lter.
1
2.1.
Fig. 10. Noise suppressor section
1 – removable noise absorbing partitions, 2 – silencer section label
1.3.7. Humidier section
RHP Pro2 units that was ordered with humidity function can control external steam humidier. Humidier generates
steam that reaches steam distributors located inside of the AHU in the supply airow. A drop eliminator is placed inside the
humidier section to prevent excess condensate from entering the ducts, so an additional drainage pipe must be connected
to this section (see section “Connection of a condensate drain”).
In order for the humidier to operate correctly, humidity sensors must be installed and connected to the C5 controller
board (See “Electrical installation”). Humidity control function (HUM) can maintain humidity of the supply or of the indoor
air – more information about this function you can nd in the “RHP Pro2 user manual”
In most cases (depending on the manufacturer) the humidier must be installed lower than humidication section in the
air handling unit, thus steam hoses will be installed with a slope towards humidier. Maximum length of the steam hoses
is also limited, thus be sure to consider these aspects when choosing the installation location of the air handling unit or
humidier.
5.
3
4
1
2
Fig. 11. Humidier section
1 – steam distributers, 2 – steam hose connection pipes, 3 – inspection window, 4 – condensate drain pipe,
5 – humidier section label

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• Install the humidier and connect it to the AHU according to the humidier manufacturer’s
instructions.
• Water quality used for the humidier must complain with country-specic hygienic requirements and
water specications described by the humidier manufacturer.
• For hygienic purposes, when the humidier is on stand-by automatic drain intervals, shorter than
48hours must be set up according to the humidier manufacturer’s instructions.
1.3.8. Smoke extraction section
The smoke extraction section is used to direct the gases and smoke generated by re in the building, directly to the
exhaust air fan, which throws them out, bypassing the AHU lters and the heat exchanger. Smoke ducts of the building are
connected 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 the
building’s re system is received (see user manual). During function operation, the thermal protection of the fans is discon-
nected to prevent them from stopping due to the high temperatures1.
5.1. 2.
33
3
4
6.
Fig. 12. Smoke extraction section
1 – 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 back
1 In smoke extraction mode, fan assembly and control electronics will maintain its operational and mechanical stability for at least 60 min. at 70°C of
extracted air/smoke temperature.

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1.4. Inspection Sides
Depending on the installation position and connection of air ducts, RHP Pro2 air handling units are available in four in-
spection 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 unit
ODA
EHA
SUP
ETA
L2 Air duct for supply air connected on the left upper side of the unit
ODA
EHA
SUP
ETA
R1 Air duct for supply air connected on the right bottom side of the unit
ODA
EHA
SUP
ETA
R2 Air duct for supply air connected on the right upper side of the unit
ODA
EHA
SUP
ETA
EHA
ODA
ETA
SUP
– outdoor air
– supply air
– extract air
– exhaust air

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2. UNIT TRANSPORTATION AND STORAGE
Units must be transported and stored in their original packaging. During transportation, units must be properly xed and
additionally protected against possible mechanical damage, rain or snow. Only an employee qualied to operate a forklift
truck or crane and familiar with the principles of cargo lifting and safety requirements, must perform unloading or lifting
operations. When a forklift is used for lifting or transporting the unit, forks must be long enough to prevent the device from
tipping over or to avoid mechanical damage to its bottom part.
L
≥L
Fig. 13. Unit transportation using a forklift or a trolley
Individual sections of the unit shall be lifted with an installation frame. Pipes should be inserted through the mounting
frame into designated openings and lifting ropes or belts xed. It must be ensured that belts will not disconnect or pipes will
not be pulled out of the frame when lifting.
Max. 60° Max. 60°
Fig. 14. Lifting of individual sections1
1
Lifting means (pipes, belts, ropes, traverses) are not included.

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If fully assembled AHU will be lifted, not each section separately, it must be done using additional reinforced mounting
frame. Each section must be placed on to the reinforced frame and connected with other sections as described in paragraph
„Connection of sections“. Sections are xed to the reinforced frame using M10 bolts through the holes instead of adjustable
feet. Reinforced mounting frame has special retractable lifting holders, for xing belts or ropes.
A
A
A - A
L
>L
Max. 60°
Fig. 15. Lifting AHU fully assembled onto reinforced mounting frame1
1 Lifting means (pipes, belts, ropes, traverses) are not included.

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42 - 92 150125
20
B
A
A
C
C
L ≤ 2,5 m
150125
150
L/5 L/5
150
40
2,5 m < L ≤ 4 m
150125
150
L/5
(L-300)/2 (L-300)/2
L/5
150
40
4 m < L ≤ 6,5 m
150125
150
L/5 L/5
150
40
(L-300)/3 (L-300)/3
(L-300)/3
L
B
Fig. 16. Dimensions of the reinforced mounting frame
• Air handling units are heavy, therefore care must be taken during lifting, carrying or moving opera-
tions. Use personal protection equipment, do not stand under a suspended unit or a part thereof.
• Only an employee qualied to operate a forklift truck or crane and familiar with the principles of
cargo 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 lift-
ing operations. Use of special supporting structures (traverses) is recommended.
• When lifting the unit or section thereof, note that their center of gravity may dier from the geomet-
ric center of the load.
• Mounting of separate air handling units in stacks is not allowed unless it’s construction design is in-
tended for such installation.
• Before installation AHU must be stored in clean and dry premises in their original packaging. If the
unit is installed but not yet in use, all connection openings must be tightly closed and the unit must
be additionally protected against environmental inuences (dust, rain, cold, etc.).

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RHP Pro2_installation manual_23-05 19
3. MECHANICAL INSTALLATION
3.1. Requirements for Mounting Location and Installation Base
RHP Pro2 air handling units are designed for ventilation of medium or large commercial or industrial premises (e.g.,
stores, oces, hotels, etc.) where standard air temperature and humidity is maintained. These units are not intended for
transporting solid particles within air ows. Standard equipment air handling units are intended for indoor installation; and
with additional accessories, these units may be mounted outdoors. Air handling units are designed for ambient tempera-
tures from -30°C to +40°C.
• RHP Pro2 units are not intended for operation in areas with potentially explosive atmospheres. Air
handling units are not designed for ventilation and dehumidication of wet areas (pools, saunas, car
washes, etc.).
• If the AHU is installed in a room with high humidity level, condensate may form on the walls of the
unit at low outdoor temperatures.
An air handling unit must be mounted on a relatively large and sturdy base, based on the weight of the unit and in ac-
cordance with building regulations. Base must be made of reinforced concrete or metal structures. If the unit is not equipped
with adjustable height feet, it must be installed on a at base. Vibration dampening gaskets must be tted between the unit
and installation base. When the unit is not equipped with an installation frame or adjustable height feet, it should be xed
to the base with metal angle-pieces and rubber vibration dampening gaskets. When installed outdoors, air handling units
must also be attached to the base. During installation, unit sections must be levelled in respect to the horizon: deviations
shall not exceed 0.3 mm for 1 m in the longitudinal direction and 0.5 mm for 1 m in the transverse direction.
42 - 92 150
40
19,4
B
L1 L2
200
L
80 80 80 80 80
80
80
40
40
150
A
C
Ø28
AC
L1
L2
L B
Fig. 17. Installation frame with adjustable feet

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3.2. Inspection Area
Based on its type, an air handling unit may be installed indoors or outdoors. When selecting an installation or mounting
location, you must foresee sucient and security compliant access space for repair and maintenance operations. The unit
must be installed in a way to allow partial or full disassembly and removal of assemblies out of the sections, if needed (e.g.,
in case of complex repairs).
B
≥300
≥500
A
≥B
Fig. 18. Device inspection area
Minimum service area A denes an area which must be free of any stand-alone or immovable devices, equipment, parti-
tions, structure or furniture. This area is sucient for performing service and lter replacement works. For repair and replace-
ment of components (e.g., removal of rotary heat exchangers), access area equal to the width of the device B shall be ensured
in front of the device.
Unit size A B
12 760 1110
22 760 1260
32 760 1410
42 760 1610
52 890 1810
62 890 2010
72 890 2210
Measurements in the table are approximate. For exact unit measurements see the technical data print-out.