Komfovent RHP Pro User manual

INSTALL ATION
MANUAL EN
RHP Pro

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RHP PRO_22-01
CONTENT
1. INTRODUCTION ...........................................................................................................................................................................................................4
1.1. Safety Requirements...........................................................................................................................................................................................4
1.2. Unit Types and Sizes ............................................................................................................................................................................................5
1.3. Unit Components and Sections ......................................................................................................................................................................6
1.3.1. Filter-Fan Section ......................................................................................................................................................................................6
1.3.2. Heat pump section...................................................................................................................................................................................7
1.3.3. Recirculation Section............................................................................................................................................................................12
1.3.4. Cooler and Heater Sections................................................................................................................................................................13
1.3.5. Air Dampers.............................................................................................................................................................................................14
1.3.6. Silencers ....................................................................................................................................................................................................15
1.4. Inspection Sides.................................................................................................................................................................................................16
2. UNIT TRANSPORTATION.......................................................................................................................................................................................17
3. MECHANICAL INSTALLATION............................................................................................................................................................................19
3.1. Requirements for Mounting Location and Installation Base.............................................................................................................19
3.2. Inspection Area .................................................................................................................................................................................................21
3.3. Connection of Sections ..................................................................................................................................................................................22
3.4. Installation of External Heating/Cooling Devices..................................................................................................................................23
3.5. Connection of a Condensate Drain.............................................................................................................................................................26
3.6. Connection to Air Ducts..................................................................................................................................................................................27
3.7. Outdoor Units.....................................................................................................................................................................................................28
4. ELECTRICAL INSTALLATION...............................................................................................................................................................................30
4.1. Requirements for Electrical Connection ..................................................................................................................................................30
4.2. Connection of Electrical Components.......................................................................................................................................................32
4.3. Control Panel Installation ..............................................................................................................................................................................36
4.4. Connection of Cables and Wires Between Sections .............................................................................................................................37
4.5. Connecting the Unit to the Internal Computer Network or the Internet .....................................................................................38
5. FILTERS ..........................................................................................................................................................................................................................40
6. COMMISSIONING AND INSPECTION OF THE UNIT.................................................................................................................................41
6.1. Control panel C5.1.............................................................................................................................................................................................41
6.2. Starting the Unit With a Computer .............................................................................................................................................................43
6.3. Calibration of Clean Filters .............................................................................................................................................................................45
6.4. Quick Inspection................................................................................................................................................................................................46

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RHP PRO_22-01
EN
1. INTRODUCTION
This Installation Manual is intended for professionals, qualied to install RHP PRO 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
ventilation, 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 opera-
tion of a heat exchanger.
RHP – 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 PRO units come in several sizes. Each size is designed for a specic air volume range:
Unit size Maximum air volume, m3/h
10 2800
20 4000
30 6000
40 8000
50 11000
60 15000
70 18000
80 22000
90 25000
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 PRO 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
1
2
3
5
4
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
6
8
7
5
910
832
37 38 39 40 41 42 43 44 45 46 47 48
13 14 15 16 17 18 19 20 21 22 23 24
25 26 27 28 29 30 31 32 33 34 35 36
12345678910 11 12
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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Rotating drum of a rotary heat exchanger is belt driven by an electric motor with a gearbox. Brush seals are installed at
the perimeter of a rotating drum and between airows to prevent dierent airows from mixing.
1
2
3
7
7
4
3
6
5
4
Fig. 3. Rotary heat exchanger assembly
1 – C5 controller main board, 2 – automatic circuit breakers, 3 – rotary wheel, 4 – motor with gearbox,
5 – pulley for rotor belt, 6 – rotor belt, 7 – sealing brushes

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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.
LPT
SVD
SVR
LP
ST
6
4
5
DT
72
1
3
9
16 15
10
HPTHP
EXV
13 14
1211
8
88
8
2
11
7
1
14
6
9
17
18
54
16
3
12
15
13
10
17
18
19
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 30
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, and when airow drops be-
low minimum limit, compressor temporarily stops. Heat pump operation is resumed only when airow increases, therefore,
it is important to take these air volumes into account when designing a ventilation system or choosing additional functions:
RHP PRO size
Minimum airow and hysteresis
to start heat-pump,
m3/h
Minimum airow to allow full
heat pump capacity,
m3/h
10 900 ± 30 1200
20 1800 ± 60 2400
30 2700 ± 90 3600
40 3600 ± 120 4800
50 5000 ± 175 7000
60 7000 ± 225 9000
70 9000 ± 300 12000
80 10000 ± 350 14000
90 13000 ± 400 16000

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Heat pump capacity
Air volume
Minimum
airow to start
heat-pump
Minimum
airow to allow full
capacity
20%
100%
Limited heat
pump capacity
Fig. 6. Heat pump capacity limitation according airow
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 pos-
sible 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 refrigerant pressure limit. This results in reduced operating life and increased probability of
failure.
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 for-
ming 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 Depends on conguration.

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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
3
1
2
Fig. 7. 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
4
2
3
1
Fig. 8. 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
1 2
Fig. 9. 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. 10. 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. 11. Noise suppressor section
1 – removable noise absorbing partitions, 2 – silencer section label

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1.4. Inspection Sides
Depending on the installation position and connection of air ducts, RHP PRO 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
outdoor intake air
air supplied to the premises
air extracted from the premises
outdoor exhaust air
ODA
SUP
ETA
EHA

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2. UNIT TRANSPORTATION
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 fork-
lift 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.
Max. 2 m
L
≥L
Max. 4 m
Fig. 12. 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°
x2
Fig. 13. Lifting of individual sections1
1
Lifting means (pipes, belts, ropes, traverses) are not included.

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Fully assembled RHP PRO 10-70 size units can be lifted by crane only if there are no additional sections connected (for
example: heaters, coolers, silencers). Units of other sizes or units with connected additional sections can be lifted only when
it‘s xed to reinforced mounting frame (ordered separately).
L
>L
Max. 60°
RHP 10-70 RHP 10-70
RHP 80-90
Max. 4 m
RHP 10-40
Fig. 14. Lifting AHU fully assembled1
• Air handling units are heavy, therefore care must be taken during lifting, carrying or moving
operations. 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 dur-
ing lifting 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 geo-
metric center of the load.
• Mounting of separate air handling units in stacks is not allowed unless it’s construction design is
intended 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.).
1 Lifting means (pipes, belts, ropes, traverses) are not included.

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RHP PRO_22-01
3. MECHANICAL INSTALLATION
3.1. Requirements for Mounting Location and Installation Base
RHP PRO 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 transport-
ing solid particles within air ows. Standard equipment air handling units are intended for indoor installation; and with ad-
ditional accessories, these units may be mounted outdoors. Air handling units are designed for ambient temperatures from
-30°C to +40°C.
• RHP PRO 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.
L1
L2
LB
42 - 92 125
60
37,5
L1 L2
200
L
70 70 70 70 70
70
70
2,5
125
2,5
A
A
C
C
B
50
Ø 65
Fig. 15. Installation frame with adjustable feet

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As large unit sections may be dicult to connect properly on site and the unit door may warp, it is necessary to adjust the
hinges. Loosen the lock screw to raise/lower the door by a few millimetres.
Fig. 16. Adjusting the hinges