TANGRA EVB - HiE Manual

Rev.2013-08-25-01
Installation and service manual of
high efficient heat recovery units
EVB – HiE

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Rev.2013-08-25-01 2
Content
1. Introduction.......................................................................................................... 3
2. Safety................................................................................................................... 3
3. Construction and application................................................................................ 8
3.1 Construction.................................................................................................. 9
3.2 Configuration................................................................................................. 9
3.3 Components.................................................................................................10
3.4 Accessories:.................................................................................................10
3.5 Overall and joined dimensions .....................................................................11
4. Transport and storage.........................................................................................13
4.1 Transport......................................................................................................13
4.2 Loading.........................................................................................................13
4.3 Storage.........................................................................................................13
5. Installation and maintenance ..............................................................................14
5.1 Installation....................................................................................................14
5.2 Maintenance.................................................................................................14
5.3 Air duct system.............................................................................................14
6. Commissioning ...................................................................................................15
6.1 Construction.................................................................................................15
6.2 Electrical connection.....................................................................................15
7. Decommissioning................................................................................................20
7.1 Dismantling and disposal..............................................................................20
8. Emergency activities...........................................................................................20
9. Applications.........................................................................................................21
9.1 Check card...................................................................................................21
9.2 Identification plate.........................................................................................22
10. Service card........................................................................................................23
Safety symbols
The following symbols could be found on the products or in the current instruction:
DANGER!
Warning! Electricity! Components under voltage!
Warning!
General warning sign.
Attention!
Attention!
Mandatory use of protective gloves and personal protective equipment!
Attention!
Please, read this part of the instruction carefully!

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Before start any installation, commissioning or service
works, please read very carefully this manual.
1.Introduction
The high efficient heat recovery units, manufactured by TANGRA, are produced in accordance with
all applicable Bulgarian and EU requirements.
Their installation and usage should be done according to the following instruction.
The manufacturer is not responsible for damages due to improper use.
This manual is an integral part of the unit. It should be kept in an easy accessible place for the
operating personnel. We recommend keeping it near the heat recovery unit.
By installation, dismantling, maintaining or cleaning the unit all safety rules should be strictly
observed. The use of personal protective equipment is required!
Changes in the construction of the unit and all its components without consulting the manufacturer
are unacceptable and could lead to improper work of the unit, damages or incidents.
By decommissioning it is important to follow strictly the prescription for environmental protection, as
well as to dispose of the units in accordance with local regulation and practices for waste
management.
2.Safety
It is forbidden, people without needed qualification to handle with the air handling unit or
parts of it. All installation and assembly work must be carried out only by specialized technicians.
It is forbidden, people without needed qualification to handle with the air handling unit or
parts of it.
•All installation and service activities should be carried out exclusively by trained
specialist personnel. The experts carrying out work on the electrical equipment must have
third qualification group.
•It is forbidden starting the fans when doors are opened, side panels are missing or
not fixed. Closing (locking) instructions of the moving parts are given on the service doors.

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•Before carrying out repairs or maintanance on the ventilator sections make sure
that the power supply is disconnected and it could not be switched back on unexpectedly by
another person.
•Before opening the fan section safety doors turn off the electrical power supply
of the motors using the safety switches mounted outside the fan housing.
•Do not pull or bend cables. They might be under support (high) voltage.
•All the elements that stay under support voltage after turning off the main switch
are marked with sign
•Before carrying out repairs on the electrical board or other elements of the unit, turn
the power supply off and wait 10 minutes before starting to work.
•In any case do not touch electrical swiches, circuit-breackes or signal lamps with
wet hands.
•Check regularly the insulation of the cables or duct joints are not damaged.
•Check at least once a month the conditions of all signal lamps and protections, build in the
air handling unit and the electrical board, using electrical measuring instrument, only when
the power supply to the electrical board is turned off.
•Do not touch terminals in the electrical board or unclad wires, because they might be
under pressure.
•Be very careful when working with voltage over 25V for AC and 35V for DC.
•Transportation and storage of the air handling unit and electrical board must be carried out
in temperature range between (-20° С) and (+40° С),
•Extremely low/high temperature or high moisture level could shorten the life of the
electrical board and its elements, to cause damages, to warp or meld the plastic parts.
•Handle carefully with the electrical board during installation, because its release could cause
damage.
•Protect the unit from dust and contaminations, because they can cause prematurely wear of
some parts.
•Do not use aggressive chemicals, solvents or abrasive detergents to clean the electrical
board.
•Do not install the electrical board on places, where it will be exposed on conditions such
as: - High dust level.
- Highly flammable materials, gases and solvents.
- Strong vibrations.
- Strong magnetic fields.

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- High humidity.
- Direct entry of water.
The electrical board should be installed in designed place covering the requirements for “IP”
protection and fire safety.
•Do not leave objects in front of mounted electrical board that could prevent the freely
access and visibility to the board (e.g. Turning off the main switch, seeing the signal lamps or
opening a door in case of an accident, damage or repairs should be done easily).
•Never put the electrical board lying on the side with the control components.
•Before maintanance or service of the electrical board, make sure that the power supply is
turned off in order to avoid any serious injuries.
•For lengthy periods of downtime, the controllers should be in position “off”.
•Installation and maintenance should be carried out by trained and qualified specialists
(specialized company). Every action should be certified with a protocol.
•In order to avoid overheating damage to the system, the water coil should be operated
only with the fan running.
Risks involved in incorrect handling or use:
•Never, for any reason whatsoever, disable, remove, modify or render inoperative in any other
way any of the safety, protective or control devices of any single component or of the fan
itself.
•Never place hands, arms or any other part of the body near any moving part.
•Never extend any part of the body past the limits of the safety barriers. Do not use any means
that will increase normal accessibility to the unit components.
•Never use the unit in atmospheres where there is a risk of explosion.
•Unauthorized operators must not attempt to rectify any malfunction of the unit and/or modify
the functional characteristics or and installation type.
•After any un programmed maintenance operation that required the removal of shields,
barriers or any other protective device, before restarting the unit ensure that all these
components have been refitted and are fully functional.
•All protective and safety devices must be kept in perfect working order at all times. All
indicative and warning plates fixed to the unit must also be kept in perfect condition at all
times and must never be removed or moved from their original position.
•When troubleshooting for the cause of any malfunction of the unit, ensure that all precautions
described in this manual have been taken to prevent personal injury and/or damage to
property.
•Remember to tighten every screw, bolt and nut of every component subject to adjustment or
maintenance.

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• Before starting the unit, ensure that all safety devices have been correctly installed and are in
perfect working order; if the above is not the case, do not start the unit and inform the head of
safety or department manager immediately.
•The operator must be equipped with Personal protection Equipments in accordance with
current legislation; the use of bulky clothing and accessories (ties, loose sleeves, etc.) is
prohibited.
Other risks related to fans:
The following is a list of specific hazards related to the fan’s mechanical characteristics:
A person may receive injuries as a result of:
•Becoming caught up between a moving parts and a stationary part, for example, between a
fan turbine and the fan housing.
•Suction of a part of the body into the fan.
•An object becoming sucked into the intake of the fan and expelled at hugh speed from the
outlet of the fan.
•Contact with surfaces of the fan at dangerous temperatures, for example, temperature below
-20°C and above +50°C.
•The aspiration of air temperature above the specified operating range, which can lead to the
deformation and breakage of the housing.
Specific risks involved in transporting and installation
All installation and assembly work must be carried out only by specialized technicians.
•When transport the unit use its original packing and follow instructions given.
•All operations involving the lifting and handling of the unit must be carried out with the utmost
caution, avoiding any knocks that could compromise the functionality or damage the unit
components.
•Only approved hoist and lifting equipment must be used.
•Before installation, the user must prepare adequate connections to earth for the unit to
prevent the build-up of electrostatic charges.
•All installed protective devices must remain fixed to the unit together with their respective
fixings (screws, bolts, etc.). The removal of one or more fixing may compromise the
functionality and tightness of the safety shield.
•In its standard form, the fan is not intended for use in a potentially explosive environment.
•The installation location of the fan must be kept clean at all times.
Specific risks involved in fan maintenance

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•During maintenance and cleaning of the fan rotor, be particular careful of the rotor. This can
lead to parts of the body becoming trapped and seriously injured between the rotor itself and
fixed parts of the fan housing.
•Even when the fan is disconnected from the power supply, the rotating parts can still turn due
to any air movement through the fan. This air flow may be natural or may be caused by the
current induced by another fan installed elsewhere in the connected tubing system. This can
also lead to parts of the body becoming trapped and seriously injured between the rotor itself
and fixed parts of the fan housing.

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3.Construction and application
Highly efficiency heat recovery units for second time use of heating / cooling of the exhaust air in the
ventilation and air conditioning systems. They are intended for work into non- aggressive and non-
sparking environment. The series of heat recovery units covers debits from 250 up to 3200 m3/h
(fig.1). The units are designed to work in a clean and not aggressive or explosive environment.
These units are designed for ventilation of individual homes and apartments, offices, small stores.
Recovered up to 85% of the energy of the discarded air!
fig.1
Available in 11 sizes (models) for horizontal and vertical installation.
Identification:

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As standard heat recovery units are designed for climate conditions and air specifics of the Sofia
region, Bulgaria. The air density factor should be corrected when these units are calculated for
higher altitude.
Operation temperature from -20°C up to +40°C.
3.1 Construction
The supporting construction is made by anodized
aluminum profiles from each side closed with heat
and sound insulated covers from galvanized metal
sheet, electrostatic painted gray (RAL 7035).
Inside insulation K-Flex ST 13mm.
Fire resistance Class-0-BS 476 PART 6/7, Bs3d0,
EN13501-1.
The immovable covers are fixed with screws.
The inspection (service) panels are fixed with special reamers for easy dismantle.
There is a version with a higher thermal insulation (sandwich panel with thickness 25 mm).
3.2 Configuration
1
Additional heater
2
Air filter
3
Electric board
4
Bypass
5
Fan
6
Plate heat exchanger “air-to-air”
7
Supporting construction
8
Pre-heater

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3.3 Components
•Fan
Exhaust and supply fan - double inlet centrifugal fan with built in motor - CBM - "S&P" - Spain.
Protection class IP20.
(IP44 - on request)
•Plate heat exchanger
High efficient plate heat exchanger – air-to-air (efficiency up to 85%)
•Air filter
Filters for fresh and exhaust air G4 (EU4) - EN 779:2002
•Condensing tray with sleeve 10mm.
3.4 Accessories:
•External high efficiency filter – F7, ΔP
max
=80Pa;
•Sound attenuators;
•External electric heater;
•Roof for outdoor installation;
•Flexible duct connectors;
•Freeze protection;
•Pressure switch;.
•Hanging supports;
•Basic steps;
•Frame for outdoor installation.

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3.5 Overall and joined dimensions
EVB __ HiE HM
Horizontal installation
Monoblock
EVB __ HiE HS
Horizontal installation
Split units

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EVB __ HiE VM
Vertical installation
Monoblock
EVB __ HiE VS
Vertical installation
Split units

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4.Transport and storage
4.1 Transport
The units are supplied fully assembled on a pallet.
When transport the unit use its original packing and follow instructions given.
All operations involving the lifting and handling of the unit must be carried out with the utmost
caution, avoiding any knocks that could compromise the functionality or damage the unit
components.
During transport, special attention should be paid to all connections (drainage, electrical parts, etc.).
In order to prevent damages on the unit all removable parts should be closed and locked during
transportation.
During transport with truck, the unit should be tightened with belts or ropes that ensure the unit
could not move. All movements of the unit should be done with suitable equipment. Assembly
components weight should be checked prior to transport.
All unit components should be inspected for transport damages immediately upon delivery with
annotations made on the delivery slip as appropriate. Damages, caused during transport, which are
not annotated, cannot be taken into consideration.
4.2 Loading
The units could be loaded, uploaded, lifted or moved with suitable equipment, such as forklift truck,
crane or hand lift truck. Unit’s dimensions and weight should be checked prior to transport.
The unit is supplied on pallet, wrapped in protective film and with protective corners, made of fibran.
When unit is loaded/uploaded with fork lift truck, the fork’s length shall be longer than the unit’s.
When transporting with hand lift truck, the forks must completely underlie the assembly
components. If the equipment is larger than the hand lift truck, a second hand lift truck should be
used for transportation.
4.3 Storage
All unit’s components or the entire unit should be stored in safety places, protected against
penetration of moisture and dust and other substances that can cause corrosion. The opening of the
unit should be covered with folio in order to protect the inner space from contamination (dust,
animals).
The air handling units and their components must be stored in indoor rooms, complying with the
following conditions::
•-relative moisture φ<80% at t (temperature)=20°C.
•-ambient temperature -40°C<t<+60°C.
The warranty is not valid for damages, caused by improper transportation, uploading
or storage.

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5.Installation and maintenance
5.1 Installation
There are four possible installation types, in compliance with UNI 10615 specifications:
•Type A: open intake and outlet.
•Type B: outlet connected to a pipe and open intake.
•Type C: intake connected to a pipe and open outlet.
•Type D intake and outlet connected to a pipe
Depending on the applications that the client intends to use the fan for and on the type of installation
chosen, the following safety shields must be fitted:
•Type A installation: fixed shields at the intake and outlet;
•Type B installation: fixed shields at the intake;
•Type C installation: fixed shields at the outlet
When installing the unit, the distance needed at the service side for maintenance or repair is
В+50cm (В– width of the unit). If the unit is equipped with multiple leaf dampers, please, make sure
the actuator (electric motor) or the manual control mechanism (important when building the duct
system) is easily accessible.
The installer should ensure that the ceiling structure is capable of supporting the weight of the
device to be installed, bearing in mind that it is a dynamic load.
The machine may include different signage pictograms, which must not be removed.The signs are
divided into:
•Forbidden signs: Do not carry out repairs or adjustments during operation.
•Danger signs: Indicates the presence of elements with tension inside the container on
which the notice is displayed.
•Identification signs: EC card, indicating the manufacturer’s address and product
details.The EC marking indicates that the product conforms to European Community
standards.
5.2 Maintenance
Periodical checks must be carried out in order to ensure the correct work of the air handling unit.
It is an owner’s or an owner’s representative duty to keep all the information and documentation,
supplied with the unit.
5.3 Air duct system
When connecting the air handling unit to the duct system, is recommended the use of flexible
connections (fig.16), in order to avoid transmission of noise and vibration. It is obligatory to build a
ground connection between both flanges of the flexible connection. Connection between two flanges
is made by clamps and bolts. The distance between two bolts should ~150mm (fig.17).

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fig.2 fig.3
6.Commissioning
6.1 Construction
•Ensure that there are no foreign bodies inside the device, and that all the components are
securely in place.
•Manually check that the fan does not come into contact with the sides.
•Make sure that mounting bolts or duct do not interfere inspection panels.
•Make sure that all service doors and panels are closed and fastened.
•Make sure that all connections are made correctly.
•Check that the inspection flap is closed.
•Ensure that ALL connections are properly made.
6.2 Electrical connection
•Fans
CAUTION!
All installation work must only be carried out by qualified and authorised personnel
using suitable equipment.
The client and/or the installer of the electric system is responible for choosing
the equipment and cables used for connecting the fan electrically, based on
the dimensions of the motor installed and the characteristics of the main
power supply.
Depending on the level of automation offers the following options:
•Without management – all consumers and equipment (sensors, pressure switches, electric
actuators, etc.) are displayed on the terminals, ordered in the electrical board. – fig4

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fig.3
•On/off and variable speed control е- fig.4
fig.5
1
-
L Power supply 230 V, 50Hz
N -neutral
2-Fuse holder with spare ( fast, ceramic)
3-Regulated output to motor
4 –Not regulated output for connecting
lamp, valve, dampers…or
tree wire connection branched off after
switch (Imax :2A)
Input: to by-pass switch.
•Management by the air quality (on/off quality sensor) - fig.6

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•Automatic PLC control with LCD display - fig.6
Electrical connection
“Belimo” ON-OFF actuator (Where applicable)
Типоразмер
Type size
Номинална мощност
Nominal power
[W]
Номинален ток
Rated current
[A]
EVB 04 HiE 2 х180 2 x 0.85
EVB 06 HiE 2 х300 2 x 1.38
EVB 08 HiE 2 х300 2 x 1.38
EVB 10 HiE 2 х300 2 x 1.38
EVB 12 HiE 2 х373 2 x 3.85
EVB 16 HiE 2 х373 2 x 3.85
EVB 20 HiE 2 х373 2 x 3.85
EVB 24 HiE 2 х373 2 x 3.85
ЕVB 30 HiE 2 х550 2 x 4.30

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