Vents TwinFresh R-50 User manual

TwinFresh R-50
SINGLEROOM REVERSIBLE
VENTILATOR
USER’S MANUAL

2
Introduction
Use
Delivery set
Designation key
Main technical parameters
Safety requirements
Design and operating logic
Mounting and set-up
Unit connection and control
Maintenance
Storage and transportation rules
Manufacturer’s warranty
Acceptance certicate
Connection certicate
Warranty card
3
3
3
5
5
11
12
14
17
22
22
22
23
23
23
CONTENT

3
TwinFresh R-50
INTRODUCTION
USE
DELIVERY SET
The unit is designed to arrange permanent controllable air exchange in ats, cottages, hotels, cafes and other domestic and public
premises.
The unit is equipped with a ceramic heat exchanger that enables supply of fresh air due to extract air heat energy utilization.
The unit heat exchange eciency reaches 91%.
The unit is designed for through-the-wall mounting. The unit it suitable for installation in the walls from 120 mm (4 3/4’’) up to 1160
mm (45 11/16”), depending on the unit conguration.
The unit is rated for continuous operation.
Transported medium must not contain any ammable or explosive mixtures, evaporation of chemicals, coarse dust, soot and oil
particles, sticky substances, brous materials, pathogens or any other harmful substances.
The unit is designed operation at the ambient temperature ranging from -20°C (-4 °F) up to +50°C (+122 °F).
The unit delivery set depending on the model is shown in tables 1-3.
Table 1
Delivery
TwinFresh R-50
TwinFresh RА-50 TwinFresh RА-50
(120V/60Hz)
TwinFresh R-50-M
TwinFresh RА-50 -М TwinFresh RА-50 -М
(120V/60Hz)
TwinFresh R-50 -L
TwinFresh RА-50 -L TwinFresh RА-50 -L
(120V/60Hz)
TwinFresh R-50 -1
TwinFresh RА-50 -1 TwinFresh RА-50 -1
(120V/60Hz)
TwinFresh R-50 -1М
TwinFresh RА-50 -1М
TwinFresh R-50 -1L
(120V/60Hz)
TwinFresh R-50 -1L
TwinFresh RА-50 -1L
TwinFresh R-50 unit + + + + + + + + + + + + + + + + +
Power cable, 3 m
Unitronic LIYY UL CSA
5xAWG/7
(5x0.25)
+ + + + + + + + + + + + + + + + +
Control and power unit + + + + + + + + + + +
User's manual + + + + + + + + + + + + + + + + +
Packing box + + + + + + + + + + + + + + + + +
Fasteners + + + + + + + + + + + + + + + + +
This user’s manual includes technical description, operation, installation and mounting guidelines, technical data for the single-
room reversible ventilator TwinFresh R-50, hereinafter referred as the unit.

4
Table 2
Delivery
TwinFresh RА-50-1L
(120V/60Hz)
TwinFresh R-50-2
TwinFresh RА-50-2 TwinFresh RА-50-2
120V/60Hz)
TwinFresh R-50-3
TwinFresh RА-50 -3 TwinFresh RА-50 -3
(120V/60Hz)
TwinFresh R-50-3М
TwinFresh RА-50-3М
TwinFresh RА-50 -3М
(120V/60Hz)
TwinFresh R-50 -3L
TwinFresh RА-50 -3L TwinFresh RА-50 -3L
(120V/60Hz)
TwinFresh R-50 -4
TwinFresh RА-50 -4
TwinFresh R-50 unit + + + + + + + + + + + + + + +
Power cable, 3 m
Unitronic LIYY UL CSA
5xAWG/7
(5x0.25)
+ + + + + + + + + + + + + + +
Control and power unit + + + + + + + + + + +
User's manual + + + + + + + + + + + + + + +
Packing box + + + + + + + + + + + + + + +
Fasteners + + + + + + + + + + + + + + +
Mounting plate + + +
Table 3
Комплектность
TwinFresh RА-50-4
(120V/60Hz)
TwinFresh R-50-4М
TwinFresh RА-50-4М TwinFresh RА-50-4М
(120V/60Hz)
TwinFresh R-50-4L
TwinFresh RА-50 -4L TwinFresh RА-50 -4L
(120V/60Hz)
TwinFresh R-50-5
TwinFresh RА-50-5
TwinFresh RА-50 -5
(120V/60Hz)
TwinFresh R-50-5М
TwinFresh RА-50-5М TwinFresh RА-50-5М
(120V/60Hz)
TwinFresh R-50-5L
TwinFresh RА-50-5L TwinFresh RА-50-5L
(120V/60Hz)
TwinFresh R-50 unit + + + + + + + + + + + + + + + +
Power cable, 3 m
Unitronic LIYY UL CSA
5xAWG/7
(5x0.25)
+ + + + + + + + + + + + + + + +
Control and power unit + + + + + + + + + + +
User's manual + + + + + + + + + + + + + + + +
Packing box + + + + + + + + + + + + + + + +
Fasteners + + + + + + + + + + + + + + + +

5
TwinFresh R-50
UNIT DESIGNATION KEY
Control unit
_ - no control unit included;
- control unit included.
TwinFresh RX-50-XX (XXX/XX)
TwinFresh – single-room reversible ventilator
Unit designation
Round connecting air duct
Air capacity [m/h]
Outer grille (outer hood) type
_ - metal outer hood;
1 - round stainless steel outer hood;
2 - metal tapered outer hood for 120-470 mm (4 3/4” - 18 1/2”) air duct;
3 - plastic round grille;
4 - plastic rectangular grille;
5 - ductwork system 204x60 mm (8 1/16” - 2 3/8”) with an end plastic grille.
Connecting air duct (telescope) air duct length
_ - 250 - 470 mm (9 13/16” - 18 1/2”);
M - 470 - 720 mm (18 1/2” - 28 3/8”);
L - 720 - 1160 mm (28 3/8” - 45 11/16”).
Power main parameters other than 230 V / 50 Hz
The main unit overall and connecting dimensions, outer view and technical parameters are shown in g. 1-6 and in tables 4-10.
TECHNICAL PARAMETERS
Table 4
Mode Voltage Power [W] Air capacity [m3/h] (CFM) RPM [min-1]
Noise level,
3 m [dB(A)]
(Sones)
IP
1230 V / 50 Hz
(120V / 60 Hz)
1,4 25(14,7) 570 22(0,5) 24
2 3,0 50(29,4) 1100 29(0,81)

6
Fig. 1. TwinFresh R-50 overall and connecting dimensions
156 mm
(6 1/8")
254 мм
(10")
274 mm
(10 13/16")
212 мм
(8 3/8")
212 mm
(8 3/8")
B
156 mm
(6 1/8")
А
Table 5
Unit modications
А B
mm inch mm inch
TwinFresh R-50
250 9 13/16” 470 18 1/2”
TwinFresh RА-50
TwinFresh RА-50 (120V/60Hz)
TwinFresh R-50-М
470 18 1/2” 720 28 3/8”
TwinFresh RА-50-М
TwinFresh RА-50-М (120V/60Hz)
TwinFresh R-50-L
720 28 3/8” 1160 45 11/16”
TwinFresh RА-50-L
TwinFresh RА-50-L (120V/60Hz)

7
TwinFresh R-50
Table 6
Unit modications
А B
mm inch mm inch
TwinFresh R-50-1
250 9 13/16” 470 18 1/2”
TwinFresh RА-50-1
TwinFresh RА-50-1 (120V/60Hz)
TwinFresh R-50-1М
470 18 1/2” 720 28 3/8”
TwinFresh RА-50-1М
TwinFresh RА-50-1М (120V/60Hz)
TwinFresh R-50-1L
720 28 3/8” 1160 45 11/16”
TwinFresh RА-50-1L
TwinFresh RА-50-1L (120V/60Hz)
Fig. 2. TwinFresh R-50-1 overall and connecting dimensions
156 mm
(6 1/8")
156 mm
(6 1/8")
212 mm
(8 3/8")
212 mm
(8 3/8")
195 mm
(7 11/16")
B
А

8
Table 7
Unit modications
А B
mm inch mm inch
TwinFresh R-50-3
250 9 13/16” 470 18 1/2”
TwinFresh RА-50-3
TwinFresh RА-50-3 (120V/60Hz)
TwinFresh R-50-3М
470 18 1/2” 720 28 3/8”
TwinFresh RА-50-3М
TwinFresh RА-50-3М (120V/60Hz)
TwinFresh R-50-3L
720 28 3/8” 1160 45 11/16”
TwinFresh RА-50-3L
TwinFresh RА-50-3L (120V/60Hz)
Fig. 3. TwinFresh R-50-3 overall and connecting dimensions
156 mm
(6 1/8")
156 mm
(6 1/8")
185 mm
(7 5/16")
212 mm
(8 3/8")
212 mm
(8 3/8")
B
А

9
TwinFresh R-50
Table 8
Unit modications
А B
mm inch mm inch
TwinFresh R-50-5
250 9 13/16” 470 18 1/2”
TwinFresh RА-50-5
TwinFresh RА-50-5 (120V/60Hz)
TwinFresh R-50-5М
470 18 1/2” 720 28 3/8”
TwinFresh RА-50-5М
TwinFresh RА-50-5М (120V/60Hz)
TwinFresh R-50-5L
720 28 3/8” 1160 45 11/16”
TwinFresh RА-50-5L
TwinFresh RА-50-5L (120V/60Hz)
Fig. 4. TwinFresh R-50-5 overall and connecting dimensions
156 mm
(6 1/8")
500 mm
(19 11/16”)
156 mm
(6 1/8")
212 mm
(8 3/8")
212 mm
(8 3/8")
93 mm
(3 11/16")
232
(9 1/8")
60 mm
(2 3/8”)
500 mm
(19 11/16”)
204 mm
(8 1/16")
А
B

10
Table 9
Unit modications
А B
mm inch mm inch
TwinFresh R-50-4
250 9 13/16” 470 18 1/2”
TwinFresh RА-50-4
TwinFresh RА-50-4 (120V/60Hz)
TwinFresh R-50-4М
470 18 1/2” 720 28 3/8”
TwinFresh RА-50-4М
TwinFresh RА-50-4М (120V/60Hz)
TwinFresh R-50-4L
720 28 3/8” 1160 45 11/16”
TwinFresh RА-50-4L
TwinFresh RА-50-4L (120V/60Hz)
Fig. 5. TwinFresh R-50-4 overall and connecting dimensions
156 mm
(6 1/8")
156 mm
(6 1/8")
212 mm
(8 3/8")
212 mm
(8 3/8")
250 mm
(9 13/16")
180 мм
(7 1/16")
А
B

11
TwinFresh R-50
Table 10
Unit modications
А B
mm inch mm inch
TwinFresh R-50-2
120 4 4/4” 470 18 1/2”
TwinFresh RА-50-2
TwinFresh RА-50-2 (120V/60Hz)
Fig. 6. TwinFresh R-50-2 overall and connecting dimensions
363 mm
(14 5/16”)
224 mm
(8 13/16”)
B
mm
mm
mm
SAFETY REQUIREMENTS
Before connecting the unit to power mains make sure that the casing is free of any visible damages and foreign objects inside that can
damage the impeller blades. Otherwise please contact the seller.
WARNING! THE UNIT IS NOT RATED FOR OPERATION IN EXPLOSIVE OR FIREHAZARDOUS MEDIA. MAKE MEASURES
TO PREVENT POSSIBLE GAS BACK DRAFTING FROM GAS OR OPEN FLAME DEVICES. WARNING: THE UNIT MAY HAVE
SHARP EDGES AND ANGLES. TAKE STEPS TO PREVENT PHYSICAL INJURIES DURING MAINTENANCE AND REPAIR
OPERATIONS.
WARNING!
DISCONNECT THE UNIT FROM POWER SUPPLY BEFOE MOUNTING AND REPAIR OPERATIONS. MAKE SURE THE
IMPELLER DOES NOT MOVE.

12
Fig. 7. Unit design
4
1 - ventilation unit with a decorative grille - 1 item
2 - inner telescopic air duct - 1 item
3 - outer telescopic air duct - 1 item
4 - outer hood (cover, back wall with a pipe) or an outer plastic grille,
depending on the unit modications - 1 item
5 - ceramic heat exchanger - 1 item
6 - Filter - 2 items
3
156
2
6
DESIGN AND OPERATING LOGIC
The unit consists of a plastic telescopic air duct (2) and (3), a ventilation unit with a decorative grille (1) and an outer hood (4), refer g.
7. A plastic ventilation grille may be used instead of a metal outer hood, depending on the unit modication.
The total telescopic air duct length is regulated due to position of the inner telescopic duct (2) inside the outer telescopic duct (3).
Two lters 7 and a ceramic heat exchanger (5) are installed in the inner telescopic air duct. The inner lter is designed for supply air
cleaning and prevention of dust and foreign objects ingress inside the heat exchanger and the impeller. The heat exchanged is used to
warm up supply air ow by extract air heat energy and provide supply of warmed-up and ltered air to the room. The heat exchanger has
a pull cord inside to facilitate its maintenance.
The ventilation unit with a decorative grille (1) and automatic shutters are to be installed on inner room side on the ventilator casing.
The outer hood (4) or the plastic ventilation grille (depending on the unit modication) is to be installed on the outer building side to
prevent ingress of water and solid foreign objects.

13
TwinFresh R-50
Fig. 8. Unit design
1
6
7
2
3
8
7
5
4
1 – Ventilation unit with a decorative grille (1 item);
2 – Inner telescopic duct (1 item);
3 – Outer telescopic duct (1 item);
4 – Plastic grille (1 item);
5 – Rectangular plastic air duct (1 item);
6 – Ceramic heat exchanger (1 item);
7 – Filter (2 items);
8 – Plastic connecting bend (1 item).
The TwinFresh R-50-5 unit consists of the plastic telescopic air duct 2 and 3, the ventilation unit with a decorative grille (1), the plastic
connecting bend (8), the rectangular plastic air duct (5) and an outer plastic grille (4), g. 8.
The TwinFresh R-50-5 unit is a telescopic unit with an adjustable length that is regulated due to position of the inner telescopic duct
(2) inside the outer telescopic duct (3).
Two lters (7) and the ceramic heat exchanger (6) are installed in the telescopic duct, inside the inner part. The heat exchanged provides
warming up of supply air ow with extract air heat energy. The lters are installed on both sides of the heat exchanger, g. 8 and serve to
purify supply air and prevent ingress of foreign objects inside the heat exchanger.
The ventilation unit with a decorative grille (1) and automatic shutters is installed on the unit casing inside the room. Due to the plastic
connecting bend (8) and the at plastic air duct (5) the unit TwinFresh R-50-5 is suitable for angular mounting. The plastic ventilation grille
(4) is installed from outside to prevent direct ingress of water and large objects to the unit.

14
The unit is designed for installation into a specially designed through hole inside a wall. The hole must be perpendicular to the wall
plane.
The mounting guidelines are shown in g. 9.
MOUNTING AND SETUP
Fig. 9. Unit mounting
Fill the gaps with a mounting foam
OUTSIDE
mm
INSIDE
Install the telescopic duct in the hole from outside and ll the gaps between the duct and the wall with a mounting foam. For easy
mounting keep the clearances between the duct and the wall within 5-10 mm (3/16»-3/8»).
Fix the outer hood according to the wall holes with four 4x35 screws and the dowels 6x35 included into delivery set, g. 10.
Fix the ventilation unit to the wall with the screws 3x25 included into delivery set and the dowels 5x25, g. 11. The mounting sequence
for other unit modications is the same, g. 11-12.
Fig. 10. Hole spacing for the outer hood fastening
for TwinFresh R-50.
200 mm
100 mm 4 holes
mm
100 mm
200 mm

15
TwinFresh R-50
Fig. 11. Hole spacing for the unit mounting
Hole spacing for fastening of the ventilation unit
for all unit modications.
Hole spacing for fastening of the external grille
for TwinFresh R-50-1
Hole spacing for fastening of the external grille
for TwinFresh R-50-4
Hole spacing for fastening of the outer hood
for TwinFresh R-50-2
with the mounting plate, refer table 2.
Hole spacing for fastening of the outer hood
for TwinFresh R-50-3
Hole spacing for fastening of the outer hood
for TwinFresh R-50-5
185 mm
(7 7/25”)
270 mm(10 3/5”)
mm
mm
mm
mm
mm mm
mm
mm
mm
mm
mm
mm
mm
mm
mm
mm
mm
mm
mm
mm
mm
mm
2 holes
4 holes
4 holes
4 holes
4 holes
2 holes

16
Fig. 12. Mounting of the single-room reversible
ventilator TwinFresh R-50-5
ll the gaps with a mounting foam
mm
mm
mm
mm
mm
The control and the transformer unit must be installed in a specially designed and prepared hole in a wall as shown in g. 13, in
inaccessible for children places. While installation consider the length of the cable supplied with the unit.
A longer cable may be used. The recommended cable type and mark are shown in g. 1-3.
Fig. 13. Hole spacing for mounting of the control unit and transformer unit.
А
А
А-А
70
(2 3/4”)
70
(2 3/4”)
mm
mm
mm
mm
mm
2 holes
R35 (R1 3/8”)
2 holes
KVR
KVR-T
А-А

17
TwinFresh R-50
CONNECTION AND CONTROL
The external control unit KVR is used for controlling of the TwinFresh R-50 unit. It is available upon order if not included into delivery
set of the unit modication.
The control and power unit enables controlling set operation modes and consists of the control unit and transformer unit, g. 14.
The unit is rated for connection to single-phase 230 V / 50 Hz or 120 V / 60 Hz depending on a transformer type. Separate power supply
must be provided both to the control and power unit and to the ventilator.
The control and transformer unit may be replaced with a control and power unit with the interconnected controller and the transformer
installed in a common junction box.
The control and power unit modication type is selected depending on the power mains voltage and power transformer in accordance
with the table 5.
Fig. 14. KVR and KVR-T control unit (overall view)
Control and power unit
KVR-T control and power unit
KVR control unit
Transformer unit

18
The control unit is a three-key switch with an integrated printed circuit board for installation into a standard junction box.
All electric connection to the control unit and the ventilator are performed with the socket connectors for mounting and servicing
facilitation. Each mating part of the connector has a colour marking in compliance with marking on the circuit board to ensure correct and
quick electric installation.
The KVR control unit is used to set one of four operation modes of the unit, g. 15:
1. Ventilation mode (air extract / air supply)* at rst speed with air capacity 25 m3/h (14.7 CFM).
2. Ventilation mode (air extract / air supply)* at second speed with air capacity 50 m3/h (29.4 CFM).
3. Reverse (heat recovery) operation at rst speed with air capacity 25 m3/h (14.7 CFM). The ventilator changes operation mode (air
extract / air supply) every 70 seconds.
4. Reverse (heat recovery) operation at second speed with air capacity 50 m3/h (29.4 CFM). The ventilator changes operation mode (air
extract / air supply) every 70 seconds.
* - air ow direction depends on position of the jumper JMP1 on the circuit board. The jumper is set to provide supply mode by default,
g. 16.
Fig. 15. Operation mode control unit
Extract/supply
mode*
Reverse operation
Second speed mode Unit on
Unit oFirst speed mode
Табл. 3Table 11
Control and
power unit name
Transformer parameters
Note
Power [W] Voltage [V]
Input Output
KVR-T-6
6
230/50 Hz
12 Connection up to 2 units
KVR-T-6
(120 V/60 Hz) 120/60 Hz
KVR-T-12
12
230/50 Hz
12 Connection up to 4 units
KVR-T-12
(120 V/60 Hz) 120/60 Hz

19
TwinFresh R-50
Fig. 16. Total wiring diagram for TwinFresh R-50 connection to KVR controller
31
32
33
34
35
36
11
12
13
14
15
11
12
13
14
15
1
2
3
4 5
1 2 3 4
5
31 32
33 34
35
36
3738
3940
ÕÒ3
25
21
22
23
24
15
14 13
12
11
5
1 2 3 4
1 2 3 4
5
31 32
33 34
35
36
3738
3940
ÕÒ3
25
21
22
23
24
15
14 13
12
11
5
1 2 3 4
L
N
5
4
3
2 1
Controller KVR
Twin Fresh R-50
JMP1
Marking "1-5" on the
connecting
cable socket connector
Marking "11-15" on the
controller
socket connector
~120 V
or
~230 V
~120 V
or
~230 V
Marking "1-5" on the
connecting
cable socket connector
Marking "11-15" on the
controller socket
connector
Marking "21-25" on the
controller socket
connector
~120 V
or
~230 V
General wiring diagram for the unit connection to KVR controller is shown in g. 16. The TwinFresh R-50 unit is connected to the KVR controller with two channels. Such connection solution provides exible
operation mode for several interconnected units.The units connected to the channel A operate in supply mode and the units connected to the channel B operate in exhaust mode. This operation logic is provided by the jumper on the circuit board of the TwinFresh R-50 units in Flow in position. In ventilation mode all the connected units operate in air extract mode (the JMP1 jumper on the circuit board is in Flow out position) or in supply mode (the JMP1 jumper on the circuit board is in Flow in position). The electric connection is performed with a ve-wire cable. The wires are marked in compliance with the delivered cable for easy installation. The minimum conductor cross section is 0.25 mm2 (23 AWG). Type and power of the step-down transformer T1 is selected on the assumption that the alternating current 12 V and power consumption 3 W is required for correct operation of one unit. Power supply 230 V / 50 Hz or 120 V / 60 Hz must be provided both to KVR (KVR-T) control unit and to the fan (socket connectors 31-21 in each case).

20
Fig. 17. General wiring diagram for connection of up to 4 TwinFresh R-50 units to KVR controller
T1 (12 W)
Channel B:1. TwinFresh R-50
Channel A:1. TwinFresh R-50
Channel B:N. TwinFresh R-50 Channel A:N. TwinFresh R-50
KVR controller
~120 V
or
~230 V
~120 V
or
~230 V
~120 V
or
~230 V ~120 V
or
~230 V
~120 V
or
~230 V ~120 V
or
~230 V
To connect from 2 to 4 TwinFresh R-50 units, follow the wiring diagram in g. 17. This wiring example shows connection through 12 W power transformer or 12 W control and power unit. Power supply 230 V / 50 Hz or 120 V / 60 Hz must be provided both to KVR (KVR-T) control unit and to each fan (socket connectors 31-21 for each case). The inputs at the controller socket connectors are marked 21 to 25. The outputs at the controller socket connectors are marked 11 to 15. The socket connectors on the delivered connecting cable are marked 1 to 5 and are designed for connection to the controller socket connectors , 11-15 for outputs and 21-25 for inputs.