Vents VUT EH EC Series User manual

USER'S MANUAL
VUT EH ECVUT EH EC

2
CONTENT
VUT EH ECVUT EH EC
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Introduction
Purpose
Delivery set
Designation key
Parameters and dimensions
Technical data
Safety requirements
Design and functioning
Mounting and set-up
Unit connection and control
Condensate drainage
Wiring diagram
Control panel connection
Unit activation/deactivation
Control
Control panel operation
Unit programming with the external control panel
Error status
Maintenance
Troubleshooting
Storage and transportation rules
Manufacturer's warranty and acceptance certificate
Seller information
Connection certificate
Warranty card
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PURPOSE
DELIVERY
SET
The user's manual consisting of the technical details, operating instructions and technical
specification applies to the installation and mounting of the heat recovery air handling unit
VENTS VUT EH EC, hereinafter " the unit".
Due to the ability to save heating energy by means of energy recovery the unit is an important
element of energy-efficient premises.
The unit is a component part and is not designed for independent operation.
The unit is designed to ensure continuous mechanical air exchange in houses, offices, hotels,
cafes, conference halls and other utility and public spaces as well as to recover the heat energy
contained in the air extracted from the premises to warm up the filtered supply air.
The unit is rated for continuous operation.
Transported air must not contain any flammable or explosive mixtures, evaporation of chemicals,
sticky substances, fibrous materials, coarse dust, soot and oil particles or environments
favourable for the formation of hazardous substances (toxic substances, dust, pathogenic germs).
THE UNIT MAY NOT BE OPERATED BY CHILDREN OR PERSONS WITH REDUCED
PHYSICAL, MENTAL OR SENSORY CAPACITIES, OR LACKING THE APPROPRIATE
TRAINING. THE UNIT MUST BE INSTALLED AND CONNECTED ONLY BY PROPERLY
QUALIFIED PERSONNEL AFTER THE APPROPRIATE BRIEFING. THE CHOICE OF UNIT
INSTALLATION LOCATION MUST PREVENT UNAUTHORIZED ACCESS BY UNATTENDED
CHILDREN.
The delivery set includes:
Heat recovery air handling unit - 1 item.
Remote mounted control panel - 1 item.
(10 m connecting cable)
User's manual - 1 item.
Packing box - 1 item.
INTRODUCTION
WARNING
!
3
VUT EH ECVUT EH EC

Designation example:
Ventilation unit with heat recovery and air capacity 300 m3/h, horizontally directed 160 mm
spigots, equipped with an electric heater and EC motors:
VENTS VUT 300-2 EH EC.
DESIGNATION
KEY
BASIC
PARAMETERS
AND DIMENSIONS
The basic unit dimensions are stated in Table 1 and in Fig. 1.
The basic unit parameters and characteristics are stated in the Tables 1.1 and 1.2.
VUT XXX X E H EC
Motor type:
EC: electronically commutated motor
Spigot direction:
H: horizontal
Heater type:
E: electric heater
Spigot diameter [mm]
1 - 150, 2 - 160, _ - 200
Air capacity [m3/h]:
300, 400, 600
Unit type
VUT: ventilation with heat recovery
4VUT EH ECVUT EH EC

5
Table 1.
Fig. 1
Dimensions [mm]
ØDBB1 B3 H H2 H3 L L1 L2
149 500 403 161 249 555 127 231 1092 1137 1198
159 500 403 161 249 555 127 231 1092 1137 1198
199 500 403 161 249 555 127 231 1092 1137 1198
199 500 403 161 249 555 127 231 1092 1137 1198
L2
L
L1 B1
H3 H2
H
B3
B2
B
ØD
B2
Model
VUT 300-1 EH EC
VUT 300-2 EH EC
VUT 400 EH EC
VUT 600 EH EC
VUT EH ECVUT EH EC

1~ 230
2 items x 70
3,0
13,0
Table 1.1.
6
TECHNICAL
DATA
150 160
3,14
14,2
300
1380
24-45
from- 25 up to +60
Aluzinc
25 mm, mineral wool
G4
max. 90%
counter-flow
polystyrene
38
The unit is rated for indoor application with the ambient temperatures from +1°C up to +40°C
and relative humidity of up to 80%.
Hazardous parts access and water ingress protection ratings:
Unit motors - IP 44;
Unit assembly connected to air ducts - IP 22.
300-2VUT EH EC300-1
F7 (Eu 7)
VUT EH EC
2 items x 0,60
VUT EH ECVUT EH EC
Unit supply voltage, 50/60 Hz [V]
Max. fan power [W]
Fan current [A]
Electric heater power [kW]
Electric heater current [A]
Total unit power [kW]
Total unit current [A]
Max. air capacity [m3/h]
PRM [min-1]
Sound pressure level at 3 m distance [dB(A)]
Transported air temperature [°C]
Casing material
Insulation
Extract filter
Supply filter
Connected air duct diameter [mm]
Weight [kg]
Heat recovery efficiency
Heat exchanger type
Heat exchanger material

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Table 1.2.
4,0
1~230
17,4
1340 2150
28-47
G4
F7 (Eu7)
200
38
400 600
20,0
400 600
4,35
VUT EH ECVUT EH EC
VUT EH ECVUT EH EC
Unit supply voltage, 50/60 Hz [V]
Max. fan power [W]
Fan current [A]
Electric heater power [kW]
Electric heater current [A]
Total unit power [kW]
Total unit current [A]
Max. air capacity [m3/h]
PRM [min-1]
Sound pressure level at 3 m distance [dB(A)]
Transported air temperature [°C]
Casing material
Insulation
Extract filter
Supply filter
Connected air duct diameter [mm]
Weight [kg]
Heat recovery efficiency
Heat exchanger type
Heat exchanger material
2 items x 175
2 items x 1,3
from- 25 up to +60
Aluzinc
25 mm, mineral wool
max. 90%
counter-flow
polystyrene

8
Read the user's manual carefully prior to installing and operating the heat recovery
air handling unit, hereinafter referred as the unit.
Fulfil the user's manual requirements as well as the provisions of all the applicable
local and national construction, electrical and technical norms and standards.
The warnings contained in the user's manual must be considered most seriously since
they contain vital personal safety information.
Failure to follow the rules and safety precautions noted in this user's manual may
result in an injury or unit damage.
After a careful reading of the manual, keep it for the entire service life of the unit.
While transferring the unit control the User's manual must be turned over to the
receiving operator.
Disconnect the unit from power mains prior to any installation, servicing, electric connection
or repair operations.
Do not operate the unit in the air and dust mixture medium!
Do not operate the unit outside the temperature range stated in the user's manual.
Do not operate the unit in aggressive or explosive environments.
Do not connect a clothes dryer or other similar equipment to the ventilation system.
SAFETY
REQUIREMENTS
!
!
RESTRICTIONS!RESTRICTIONS!
RESTRICTIONS!RESTRICTIONS!
VUT EH ECVUT EH EC
WARNING
WARNING

9
UNIT DESIGN
AND OPERATING
LOGIC
The unit operates as follows:
Warm stale extract air from the room flows to the unit, where it is filtered, then air flows
through the heat exchanger and is exhausted outside by the extract fan.
Clean cold air from outside is moved by the supply filter.
Then filtered air flows through the heat exchanger and is moved to the room with the
supply fan.
Heat energy of warm extract air is transferred to clean intake fresh air from outside and
warms it up.
The air flows remain fully separated within the heat exchanger.
Heat and energy recovery minimizes heat losses and ensure humidity balance, thus reducing
expenses for heating in the cold seasons and air conditioning in the warm season.
The unit is a frame structure consisting of six 25 mm thick rigidly fixed aluzinc sandwich panels,
internally filled with mineral wool for sound insulation.
The unit components: the quick detachable specially sealed service panels 14 provide
maintenance access; the side casing panels 13 with a terminal box 15 fixed to the outer
surface of one them.
The terminal box incorporates a terminal block (not shown in Fig. 2) with the wires routed
from the circuit control board.
The sealed cable gland is used for routing of power and ground cables from the unit and
connection to the terminal block.
The wiring diagram for connection of the air handling unit is shown on inner side
of the terminal box lid.
VUT EH ECVUT EH EC

10
The basic unit complete set includes:
- remote-mounted control panel 9 that is connected via the data cable 12 to the integrated
control system in the unit;
- a supply 1 and an extract 2 centrifugal single-intake fans with backward curved blades and
maintenance-free external rotor motors with built-in overheating protection.
- plate counter-flow heat exchanger. It may be temporary replaced with a summer block
for a season requiring no heat recovery.
- one electric air heater. Two integrated thermal switches, one of safety type with response
temperature +50 °C and automatic reset and another of emergency type with response
temperature +90 °C and manual reset.
- supply filter 4 with filter class G4 or F7 and extract filter 5 with filter class G4.
The supply filter prevent ingress of contaminants from the outdoor air to the room and
prevent the unit components from contamination.
The extract air filters protect the unit components from contamination.
The filter replacement warning is shown by the lamp indicator on the control panel.
The filter replacement periodicity is set from 10 up to 99 days on the control panel.
During heat recovery condensate may be generated.
Condensate is collected in the drain pan 11 and flows outside via the drain pipe 6.
VUT EH ECVUT EH EC

11
Fig. 2
1 - Supply fan;
2 - Extract fan;
3 - Plate counter-flow heat exchanger;
4 - Supply filter;
5 - Extract filter;
6 - Drain pipe;
7 - Electric heater;
VENTS … EH EC
UNIT DESIGN
8 - Bypass damper;
9 - Remote-mounted control panel;
10 - Casing with integrated control unit;
11 - Drain pan;
12 - Data cable;
13 - Side unit panels;
14 - Quick-detachable panels;
15 - Terminal box.
12
3 45
6
7
8
9 10 11 12
13 13
1415
Intake air
Exhaust air
Extract air
Supply air
VUT EH ECVUT EH EC

12
The unit is designed for ceiling mounting by means of the threaded rod fixed inside the
threaded dowel (Fig. 3). Optionally, it may be rigidly fixed on a horizontal even surface
(Fig. 4). Mount the unit to provide enough access for maintenance or repair operations.
For the minimum distances from the unit to the walls, refer to the Fig. 5.
MOUNTING
AND SET-UP
To attain the best performance of the unit and to
minimise turbulence-induced air pressure losses
while mounting connect the straight air duct section
to the spigots on both sides of the unit.
Minimum straight air duct length:
equal to 1 air duct diameter on intake air spigot.
equal to 3 air duct diameter on supply air spigot.
Fig. 5
Fig. 3 Fig. 4
The minimum distance for service access
to the unit
Location of electronic control unit
If the unit supply and exhaust spigots are not connected to air ducts, these must be covered
with a grille or with another protecting device with maximum mesh width 12.5 mm to prevent
free access to the unit fans.
VUT EH ECVUT EH EC

13
After the unit mounting it must be connected to a drain system as shown in Fig. 6.
The unit must be sloped down toward the drain pipe by 1-2°.
Connect the drain pipe (1), the U-trap (3) and the sewerage system (5) with metal, plastic
or rubber hoses. The hoses (2,4) must be installed at the minimum downward slope of 3°,
i.e. 1 m pipe must be sloped down by 55 mm.
Before starting the unit fill the drain system with water and check that the U-trap is always
filled with water.
Make sure that the water drainage is correct. Wrong connection to sewage system may result
in condensate accumulation inside the unit. The condensate drainage system is designed
for operation at the ambient temperature above 0 °C!
If the ambient temperature is below 0 °C, the condensate drainage system must be heat
insulated and pre-heated.
CONDENSATE
DRAINAGE
Fig. 6
12345
200
110
VUT EH ECVUT EH EC

14
Do not connect several drain pipes from several air handling units to a single U-trap!
Direct condensate drainage outside without connection to sewage system is not allowed.
!
VUT EH ECVUT EH EC
WARNING

15
Disconnect the unit from power supply prior to any electric installation operations.
Installation shall only be performed by a professional electrician. The rated electrical
parameters are stated on the rating plate. Any tampering with the internal connections
is prohibited and will void the warranty.
The unit is rated for connection to AC single-phase 230 V / 50/60 Hz power mains.
The electric connection must be performed using durable, insulated and heat-resistant
conductors (cables and wires) with minimum cross section 2.5 mm2.
The given conductor section value is tentative. In practice the cable core selection shall be
based on the maximum permissible wire heating depending on the wire type, its insulation,
length and installation method (i.e. overhead, in pipes or inside the walls).
Connect the unit to power supply on the terminal block located in the terminal box on the unit
side wall, in compliance with the wiring diagram and terminal designation in Fig. 7.
Route the cables to the terminal block in the terminal box on the unit side wall through
the electric lead-in to preserve the electrical protection class.
The external power input (230 V / 50/60 Hz) must be equipped with an automatic
thermal-magnetic circuit breaker built into the stationary wiring to disconnect all the
power mains phases.
The mounting place of the automatic circuit breaker QF must ensure prompt access
for emergency shutdown of the unit.
The trip current of the circuit breaker must match the unit consumption current.
Recommended circuit breaker trip current.
16 A (for VUT 300-1 EH EC and VUT 300-2 EH EC)
25 A (for VUT 400 EH EC and VUT 600 EH EC).
VUT EH ECVUT EH EC
CONNECTION
TO POWER
MAINS

The temperature sensor is integrated in the control panel. Therefore, the installation place
of the control panel must be at least 1 m away from heating equipment, doors and windows.
Attach the control panel to the wall using the supplied screws.
The control panel is supplied to the control unit with the supplied standard four-wire
10 m cable.
The data cable connecting the control panel and the unit shall be routed separately from
the power cables. The recommended minimum distance between the cables is 150 mm.
The control panel is delivered assembled and pre-wired to the control unit. In case of need
to re-assemble the control panel please follow the steps below.
Disassemble the control panel:
a) Press the side latches to open the control panel;
b) Disconnect the cable from the terminal block using the screwdriver (Fig. 8);
c) Open the cable clamp on the mounting frame using cutting pliers;
d) Remove the cable and mount the cable as required.
Complete mounting of the control panel (Fig. 8):
a) Route the cable through the access hole in the bottom lid;
b) Fix the control panel back lid in the installation place and ensure a secure fit of the lid
to the wall by tightening the self-tapping screw.
The screw head must not be in contact with the control circuit board, otherwise causing
a risk of equipment damage!
CONNECTION
OF CONTROL
PANEL
16
N
PE
L
N
PE
QF IX1
L
~230 V, 50/60 Hz
Fig. 7
VUT EH ECVUT EH EC

Fig. 8
c) Strip the cable of the protective insulation (~20 mm);
d) Strip the wires of the protective insulation (~6 mm);
e) Attach the wires to the terminal block on the control board according to the markings
on the sticker and the wire colouring:
f) fix the cable on the mounting base using the cable clamp (not included in the delivery set);
g) Snap the control panel casing in place.
On the unit side, route the cable with the connector via the electric sealed lead-in in the terminal box
and snap it in the socket (Fig. 9, item 1) or connect the wires to the contacts of the socket connector
(Fig. 9, item 2), depending on the control panel modification. The unit connection is performed with a
socket connector (Fig. 9. item 2).
The unit is equipped with thermal resistors. These parts are included in the delivery set and are
pre-installed at factory. Therefore, there is no need to connect a duct sensor.
17
+
Â
À
+
Â
À
terminal
block
cable
clamp
mounting base
(frame)
Black
Red
Green
Yellow
VUT EH ECVUT EH EC
………..
.……... À
……… Â
…….… +

Functional capabilities.
The system enables to control air capacity of the supply and extract fan in 3 speed steps:
1 - low speed;
2 - medium speed;
3 - maximum speed.
2. The temperature sensors enable to select the most suitable operation mode for maintaining
a pre-set air temperature in the air duct.
3. The control panel is equipped with a temperature sensor thereby enabling maintaining
of the set (user-defined) indoor temperature at the selected fan speed or in accordance
with the set service function mode (see below). The required operation mode setting as well
as the current parameters (i.e. indoor temperature, set temperature, fan speed and
heater power) are shown on the LCD display.
4. The energy-saving optimization program calculates the heater power required to sustain
the indoor temperature with up to 1°C accuracy while adjusting the heater power to 1%.
5. The air bypass damper prevents freezing of the heat exchanger at low supply
air temperature and, if necessary, disables intake air entering the heat exchanger in the
cold ventilation mode (heat exchanger bypass mode).
6. The system status monitoring program controls the operating parameters of the unit
and initiates emergency shutdown in dangerous situations (i.e. heater overheating or
communication loss) by sending corresponding signals to the control panel.
Filter replacement warnings are displayed at user-defined intervals (see below).
7. The control panel enables to control various extra connected devices as duct heaters,
dampers, etc.
18VUT EH ECVUT EH EC

Fig. 9
Socket connector
for the control panel
Socket connector for duct
temperature sensor
Socket connector for outer
temperature sensor
Connect the unit to the power mains 1~230 V/50/60 Hz (for details, refer to connection
to power mains).The indicator displays the “VENTS” logo, the LED indicators are off.
To activate the unit press the Power button, select On and press the Enter button.
This green LED goes on, the current operation mode is activated and the control panel
indicator displays the main operation window information.
To deactivate the unit press the Power button, select Off and press the Enter button.
The unit switches to the heating elements cooling mode (green LED is blinking) and goes
off in 2 minutes. The operation parameters are selected and edited via the user menu,
see the details below.
UNIT
ACTIVATION/
DEACTIVATION
UNIT
CONTROL
The unit is controlled via the remote-mounted control panel. The physical "control panel-unit"
data transfer channel is performed via a four-core data cable up to 10 m in length.
The unit has a digital data transfer.
19
Control board
VUT EH ECVUT EH EC

OPERATING
THE CONTROL
PANEL
Fig. 10
Service functions.
The service functions of the control system are as follows:
1. The week scheduled program enables automatic programming of the user-defined
parameters as indoor temperature, fan speed for each week day and current time.
This function provides automatic changeover between day and night modes as well as
"week days" and "week end" and is easy to program for each week day.
2. The day scheduled program enables automated activation and deactivation of the unit
in a user-defined time.
3. The heat exchanger operation mode changeover enables to control the unit operation
depending on the Winter or Summer season.
4. Regular filter replacement must be performed to ensure cleanliness of the supply filter.
The automation system possesses the function of the filter replacement timer to enable
timely replacement of the filter.
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1. LCD display.
2. Red LED indicator. Its steady glow indicates
an alarm or a fault and its blinking indicates
the need to replace the filter.
3. Temperature sensor.
4. "Up" button is used for going up in the list
of menu or increasing the current parameter.
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2
3 4 5 6 87
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VUT EH ECVUT EH EC