Remak RP/Ex User manual

INSTALLATION AND OPERATING INSTRUCTIONS 03/2022
RP radial duct fans
Ex design
type: RP * - * / * - ** Ex

2
e current version of the document is available at www.remak.eu
Content
Technical details .............................................................................................................................................................................3
Use of fans ......................................................................................................................................................................................3
Operating conditions, position....................................................................................................................................................3
Dimensional range .........................................................................................................................................................................3
Materials .........................................................................................................................................................................................3
Impellers..........................................................................................................................................................................................3
Electric motors...............................................................................................................................................................................3
Electric instalation.........................................................................................................................................................................4
Electric motor protection .............................................................................................................................................................4
Fan Output Control ........................................................................................................................................................................4
Accessories.....................................................................................................................................................................................4
Description and designation of fans...........................................................................................................................................5
Designations used .........................................................................................................................................................................5
Dimensions, weights, performances..........................................................................................................................................6
Fan parameters...............................................................................................................................................................................6
Data part .........................................................................................................................................................................................7
ermistor protection of Ex fans ............................................................................................................................................. 11
Installation ................................................................................................................................................................................... 11
Operation, maintenance and service ....................................................................................................................................... 12
Wiring ........................................................................................................................................................................................... 13
Examples of electrical installation ........................................................................................................................................... 14
Disposal and recycling................................................................................................................................................................ 16

3
RP fans * - * / * - ** Ex
Technical details
mounting the fan with the motor cup facing upwards.
To achieve lower pressure losses in the assembly, we reco-
mmend designing a straight pipe with a length of 1 ÷ 1.5 m
for the fan discharge.
Dimensional range
RP Ex fans
are produced in six
sizes, referred to in
according to size
A x B [cm] connecting
flanges, see Figure 2.
Manufactured as stan-
dard dimensional and
performance
many non-explosive
fans allows designers
optimize use all para-
meters nozzles for air
flow up to 5,800 m3/h.
Materials
e outer casing of RP
Ex fans and the conne-
cting flanges are made
of hot - dip galvanized (Zn 275 g / m2) of steel or stainless
steel sheet. Impeller blades are made of galvanized sheet
steel, copper diffusers, electric motor housing made of alu-
minum alloys. e internal construction of electric motors
consists of steel, copper and plastic parts. All materials are
carefully inspected, inspected and guarantee a long service
life and reliability of the fans.
Impellers
e impellers of RP Ex fans have forward curved blades.
e direction of rotation must be checked aer connecting
the electric motor. e impellers must always be turned to
the le, counterclockwise (from the point of view of the in-
spection hole on the pan). e inspection hole on the motor
bowl is closed with a rubber seal. e impellers, together
with the motor, are perfectly statically and dynamically ba-
lanced.
Motors
Compact asynchronous
ones are used for the drive
three-phase motors with
external rotor and resistan-
ce armature, correspon-
ding to the power and spe-
ed approved according to
Directive 2014/34 / EU
(ATEX 114), see Figure 2.
e electric motors are
housed inside the impeller
and are optimally cooled
during operation. women with flowing air. High-quality en-
capsulated ball bearings with permanently lubricated mo-
tors enable a fan life of more than 40,000 operating hours
to be achieved without maintenance.
Use of Ex fans
Explosion-proof, fully adjustable, low-pressure, centrifugal
fans RP * - * / * - ** Ex (hereinaer only RP Ex) they can
be used universally, from simple ventilation to complex air
conditioners for complex air treatment. Due to the special
construction preventing the formation of mechanical spark
sparks according to the standards ČSN EN ISO 80079-
36, ČSN EN ISO 80079-37, ČSN EN IEC 60079-0 and the
secured design "e" with the level of protection "eb" of the
electric motor according to ČSN EN 60079-7 the fans are
intended for use in environments with a risk of explosion of
gases and vapors.
Operating conditions, location
RP Ex fans are approved by the Notified Body No. NB 1026,
Physical-Technical Testing Institute, sp, Ostrava- Radvanice.
e fans are designed for indoor and outdoor use. It is used
for air transport without solid, fibrous, sticky, aggressive
admixtures. e air must not contain chemicals that cause
corrosion of zinc, copper and aluminum. e permissible
supply air temperature is in the range of -20 to + 40 ° C.
From the point of view of the classification of areas with a
risk of explosion according to ČSN EN 60079-10-1, the fans
are designed for the environment and for the extraction of
air from the environment.zone 1 or zone 2. Explosion-proof
electric motors of RP Ex fans are in the secured design “eb”
according to the standard ČSN EN 60079-7 and belong to
the group II according to the standard ČSN EN IEC 60079-0
and are markedby sign of non-explosiveness:
II 2G Ex eb IIC T3 Gb.
RP Ex fans are marked with a non-explosive symbol
II 2 / 2 G Ex h IIB+H2T3 Gb / Gb.
e fans can work in any position.
When placing RP Ex fans under the ceiling, it is advisable
to mount the fan with the motor cup facing downwards for
better access to the terminal box and the motor.
If the air is saturated with moisture or there is a risk of in-
tense inside the fan steam condensation, we recommend
Figure 1 –legend of RP Ex fan explosion mark
Marking according to standard ČSN EN ISO 80079-36: 2016
II
2/2 G
Ex h
IIB+H2
T3
Gb/Gb
explosion proof symbol
equipment group - equipment for surface
applications in explosive atmospheres
equipment category - fan extracting from zone 1,
located in zone 1
non-electrical equipment:
– protection by safe construction "c"
– air distance between parts, IP
subgroup of gases according to the properties of
an explosive gas atmosphere
temperature class, maximum surface temperature
of the device T ≤ 200 °C
equipment protection level (EPL) for the interior
and exterior of the equipment
Marking according to Directive No. 2014/34 / EU
400-200
500-250
40-20
50-25
600-300 60-30
600-350 60-35
700-400 70-40
80-50800-500
A x B [mm]
Figure 2 – dimensional range
Figure 3

4
e motor protection is IP44, insulation class F. e win-
dings are protected against moisture by additional impreg-
nation. e motors are characterized by a relatively low
inrush current.
Electric instalation
e electrical installation of the fan itself is terminated by a
special non- explosive terminal block with IP 66 protection.
e connection diagrams of the electric motor are in a se-
parate chapter Electrical installation.
Attention! Electric motors must not be connected in a
delta. ey are always connected only to the star (for
nominal voltage 3x400V / 50Hz or reduced voltage).
Electric motor
protection
For all motors, continuous
monitoring of the internal
motor temperature is provi-
ded as standard. e internal
temperature is sensed by
miniature temperature sen-
sors, thermistors, which are
stored in the winding of the
electric motor. e thermis-
tors must be connected to
an ATEX-certified thermistor
relay (approved type II (2)
G), which must be located outside potentially explosive
atmospheres. e relay at 130 °C irreversibly opens the
control circuit (contactor switching circuit) meeting the
operating conditions in the relevant zone 1 or zone 2. For
the design, selection and installation of electrical installa-
tions in explosive atmospheres, the specific requirements
of the ČSN EN 60079-14 standard must be respected. e
method protects the motor against operationally unfavo-
rable influences - for example against overload, failure of
one phase of the network or short circuit, firm braking of
the motor, interruption or short circuit of the protection
circuit, high temperature of the transported air. ermal
protection with proper connection is comprehensive and
reliable. ermistors of up to two fans can be connected to
one thermistor relay, but they must be connected in series.
In such a combined connection, it must be borne in mind
that in the event of a failure of one electric motor, both fans
will be stopped.
Attention! It is not permissible to protect the electric
motors of the fans with conventional current-depen-
dent protection with motor overcurrent protection
elements!
Fan Output Control
For fans, several control methods can generally be used,
but for RP Ex fans, voltage control is the most suitable. e
fan output can be fully regulated by changing the speed.
e speed changes as the voltage at the terminals of the
electric motor changes (decreases). RP Ex fans are conti-
nuously adjustable if the voltage change is continuous. In
practice, step voltage regulators are more oen used. e
voltage must not increase above the nominal value accor-
ding to the label value and the current must not exceed the
nominal value of the fan electric motor.
Attention! It is not permissible to control the speed of
the electric motor of the RP Ex fan with a frequency
converter!
5-stage voltage regulation
Voltage regulation of Vento fans is technically and opera-
tionally the most advantageous. ere is no danger of in-
terference, there is no humming, whistling and vibration of
the motor, voltage- regulated motors become less hot. e
voltage regulators TRN and TRR can be used to regulate
the fan power in 5 stages with a step of about 20%, which
corresponds to 5 curves of pressure versus flow in the ope-
rating characteristics of each fan. e electric motors of RP
Ex fans can be operated in the range of 25% to 100% of
Technical details
Table 1 – correlation of voltage and regulation
the rated voltage. Table 1 shows the relationship between
the controller output voltage and the set power stage. Ex
fans are only supplied with three-phase electric motors.
ree- phase TRN or TRRD controllers are used to regulate
their speed or power. TRN controllers are manufactured in
four types according to the current value of TRN 2D, TRN
4D, TRN 7D and TRN 9D. An important feature of this se-
ries is the possibility of remote control by manual control
ORe 5, or automatic switching of 5 stages by control OXe
depending on the external control signal 0 to 10 V). e
simpler TRRD controllers are also available in four sizes,
TRRD 2, TRRD 4, TRRD 7 and TRRD 9. ese controllers
ncannot be controlled automatically or remotely (therefore
they require location within easy reach) and do not include
fan protection (must be fully secured by other equipment).
Attention! No other type of control is permitted!
Accessories
RP Ex fans form part of a wide range of elements of the
Vento modular ventilation and air conditioning system. By
selecting suitable elements, any air handling unit can be
assembled for simple ventilation and complex comfort air
conditioning. When designing individual devices, it is nece-
ssary to keep in mind for which environment the devices
are intended. An approved type of thermistor relay can be
ordered together with the fan for thermal protection of the
fans.
Figure 4 – thermistor
ree-phase
electric motor
Characteristic curve - regulator stage
Voltage (V)

5
RP fans * - * / * - ** Ex
Description and designation of fans
Figures 5, 6 and Table 3 contain data on important fan di-
mensions, Table 4 contains basic parameters and nominal
values of RP Ex fans.
Explosion-proof design Ex
Electric motor
D – three-phase electric motor
Number of electric motor poles
4 – four-pole
6 – six-pole
Impeller diameter (cm)
Connection dimension B flange (cm)
Connection dimension A flange (cm)
Fan type
RP 60 - 30 / 28 - 4 D Ex
1 –
2 –
3 –
4 –
5 –
6 –
7 –
8 –
9 –
10 –
11 –
12 –
Technical details
Figure 5 – type key for designating Ex fans
Table 2
Used designations in fan parameters
m – hmotnost (±10%) kg
S – surface m2
V – volume flow m3/h
n – speed min-1
t – air temperature °C
∆ps– static pressure difference Pa
∆pd– dynamic pressure difference Pa
∆pt– total pressure difference Pa
ρ– specific gravity of air kg/m3
LW– sound power level dB
LWA – sound power level weighted dB(A)
LWA rel – relative sound level. ex. weighted dB(A)
U – voltage V
I – current A
P – input power W
Working characteristics
e performance characteristics of RP Ex fans are measu-
red in a REMAK test room for aerodynamic and electrical
measurements of fans and measurement of pressure lo-
sses of passive elements.
In the data part of this catalog, next to the characteristics
of each fan, there is a table of the most important values
(see eg table 2). ese values are also listed on the fan na-
meplate.
e meaning of the individual lines is as follows:
1 Value of nominal power supply voltage
2 Maximum power input of the motor at working
point 5c.
3 Maximum current at nominal voltage at working
point 5c.
4 Mean speed, rounded to tens, measured
at working point 5b.
5 Capacitor capacity with single-phase fans.
6 Maximum permissible transported air temperature.
7 Maximum air flow at working point 5c.
8 Maximum total pressure between points 5a–5c
9 Minimum permissible static pressure at point 5c.
10 Total weight of the fan.
11 Recommended fan output controller.
12 Recommended protecting relay of the fan
without controller and control unit
3× 400 V 50 Hz
281
0.50
1400
–
40
1306
260
0
13
TRN 2
therm. relay
RP 40-20/20-4D Ex
Power supply Y
Max. electric input P max [W]
Max. current (5c) I max [A]
Mean speed n [min-1]
Capacitor C [µF]
Max. working temp. tmax [°C]
Air ow max. Vmax [m3/h]
Total pressure max. ∆pt max [Pa]
Static pressure min. (5c) ∆ps min [Pa]
Weight m [kg]
Five-stage controller type
Protecting relay type

6
Table 3 – RP Ex Fan Dimensions
Dimensions, weights, performance
Figure 6 and Table 3 contain data on the important dimen-
sions of the RP Ex fans.
Vmax. – maximum air flow at minimum permitted pressure loss
∆pt max. – the maximum total fan pressure is the maximum of the sum ∆psand ∆pd(∆ps+ ∆pd)max.
∆ps min. – the minimum allowed static pressure (pressure loss of the connected pipeline) indicates the lowest value at which the fan must be set
choked (at nominal voltage at point 5c) to prevent overloading and protection activation
n – fan speed measured at the operating point with the highest efficiency (5b), rounded to tens
U – nominal supply voltage of the motor without regulation (all values in the table refer to this voltage)
Pmax. – maximum power of the electric motor at the highest load, i.e. at flow rate Vmax.
I max. – maximum phase current at voltage U and the highest permitted load, i.e. at flow rate Vmax. in point 5c
(aer connection, it is necessary to check this value and mark the measured current in the warranty card)
t max. – the highest permitted temperature of the transported air during flow Vmax.
controller – prescribed voltage regulator for fan regulation
m* – fan weight (±10%)
Fan parameters
Figure 6 – dimensional drawing of RP Ex fans
Table 4 - RP Ex fan basic parameters and nominal values
Fan type V max ∆ptmax ∆psmin n nom U nom P max I max t max Control. m
m3/h Pa W min-1 V W A °C type kg
RP EX – SINGLE-PHASE MOTORS
RP 40-20/20-4D Ex 1306 260 0 1400 400 281 0,5 40 TRN 2 13
RP 50-25/22-4D Ex 1813 320 60 1430 400 545 0,93 40 TRN 2 18
RP 60-30/28-4D Ex 3195 480 0 1440 400 1300 2,32 40 TRN 4 33
RP 60-35/31-4D Ex 3950 603 220 1440 400 2044 3,9 40 TRN 4 47
RP 70-40/35-6D Ex 4108 360 150 900 400 1100 2 40 TRN 2 44
RP 80-50/40-6D Ex 5829 496 238 930 400 1950 3,7 40 TRN 4 68
Fan type Dimensions in mm
A B C D E F G H
RP 40-20/20-4D Ex 400 200 420 220 440 240 277 500
RP 50-25/22-4D Ex 500 250 520 270 540 290 349 530
RP 60-30/28-4D Ex 600 300 620 320 640 340 399 642
RP 60-35/31-4D Ex 600 350 620 370 640 390 427 720
RP 70-40/35-6D Ex 700 400 720 420 740 440 477 780
RP 80-50/40-6D Ex 800 500 820 520 840 540 577 885

7
RP fans * - * / * - ** Ex
Air flow max. Vmax [m3/h]
Air flow max. Vmax [m3/h]
Power supply Y
Max. electric input P max [W]
Max. current (5c) I max [A]
Mean speed n [min-1]
Capacitor C [µF]
Max. working temp. tmax [°C]
Air ow max. Vmax [m3/h]
Total pressure max. ∆pt max [Pa]
Static pressure min. (5c) ∆ps min [Pa]
Weight m [kg]
Five-stage controller type
Protecting relay type
Power supply Y
Max. electric input P max [W]
Max. current (5c) I max [A]
Mean speed n [min-1]
Capacitor C [µF]
Max. working temp. tmax [°C]
Air ow max. Vmax [m3/h]
Total pressure max. ∆pt max [Pa]
Static pressure min. (5c) ∆ps min [Pa]
Weight m [kg]
Five-stage controller type
Protecting relay type
Total pressue max. ∆pt max [Pa]Total pressue max. ∆pt max [Pa]
Parameters in selected working points 5a 5b 5c 4a 4b 4c 3a 3b 3c 2a 2b 2c 1a 1b 1c
Voltage U [V]
Current I [A]
Input power P [W]
Speed n [min-1]
Air ow V [m3/h]
Static pressure ∆ps[Pa]
Total pressure ∆pt[Pa]
Inlet Outlet Surrounding
Point 5b 5b 5b
Total sound power level LWA [dB(A)]
LWA
Sound power level LWAokt [dB(A)]
125 Hz
250 Hz
500 Hz
1000 Hz
2000 Hz
4000 Hz
8000 Hz
Inlet Outlet Surrounding
Point 5b 5b 5b
Total sound power level LWA [dB(A)]
LWA
Sound power level LWAokt [dB(A)]
125 Hz
250 Hz
500 Hz
1000 Hz
2000 Hz
4000 Hz
8000 Hz
Parameters in selected working points 5a 5b 5c 4a 4b 4c 3a 3b 3c 2a 2b 2c 1a 1b 1c
Voltage U [V]
Current I [A]
Input power P [W]
Speed n [min-1]
Air ow V [m3/h]
Static pressure ∆ps[Pa]
Total pressure ∆pt[Pa]
5a 4a 3a 2a 3b
5b
4b
2b
1b
1c 2c 3c 4c 5c
∆pd
1a
5a 4a 3a 2a 3b
5b
4b
2b
1b
1c 2c
3c
4c
5c
∆pd
non-wor-
king area
1a
400 280 230 180 140
0.32 0.34 0.50 0.20 0.27 0.49 0.17 0.22 0.47 0.15 0.19 0.42 0.14 0.20 0.36
64 123 281 43 103 217 36 71 172 35 50 119 29 44 81
1457 1397 1222 1430 1308 1014 1409 1303 895 1346 1265 712 1285 1135 586
0 563 1306 0 556 1078 0 395 945 0 271 744 0 261 600
260 242 0 252 209 0 242 210 0 232 195 0 215 156 0
260 244 12 252 211 8 242 211 6 232 196 4 215 157 3
400 280 230 180 140
0.59 0.62 0.93 0.37 0.48 0.95 0.37 0.44 0.97 0.31 0.45 0.99 0.35 0.48 0.83
164 248 545 105 180 414 113 143 341 76 124 264 75 104 168
1458 1425 1300 1432 1371 1120 1384 1348 971 1374 1274 733 1271 1136 567
0 882 1813 0 756 1497 0 587 1295 0 508 1113 0 423 834
317 307 60 298 288 55 282 275 42 261 245 0 237 189 0
317 309 70 298 289 62 282 276 47 261 246 4 237 190 2
LWA 67 73 61
55 51 48
58 59 52
56 64 54
62 69 56
61 67 54
59 65 49
49 56 42
LWA 71 76 63
60 55 51
62 62 54
60 67 56
66 72 58
65 70 56
63 68 51
51 57 41
3× 400 V 50 Hz
281
0.50
1400
–
40
1306
260
0
13
TRN 2
ATEX therm. relay
3× 400 V 50 Hz
545
0.93
1430
–
40
1813
320
60
18
TRN 2
ATEX therm. relay
RP 40-20/20-4D Ex
RP 50-25/22-4D Ex

8
Air flow max. Vmax [m3/h]
Air flow max. Vmax [m3/h]
Total pressue max. ∆pt max [Pa]Total pressue max. ∆pt max [Pa]
Parameters in selected working points 5a 5b 5c 4a 4b 4c 3a 3b 3c 2a 2b 2c 1a 1b 1c
Voltage U [V]
Current I [A]
Input power P [W]
Speed n [min-1]
Air ow V [m3/h]
Static pressure ∆ps[Pa]
Total pressure ∆pt[Pa]
Inlet Outlet Surrounding
Point 5b 5b 5b
Total sound power level LWA [dB(A)]
LWA
Sound power level LWAokt [dB(A)]
125 Hz
250 Hz
500 Hz
1000 Hz
2000 Hz
4000 Hz
8000 Hz
Power supply Y
Max. electric input P max [W]
Max. current (5c) I max [A]
Mean speed n [min-1]
Capacitor C [µF]
Max. working temp. tmax [°C]
Air ow max. Vmax [m3/h]
Total pressure max. ∆pt max [Pa]
Static pressure min. (5c) ∆ps min [Pa]
Weight m [kg]
Five-stage controller type
Protecting relay type
Power supply Y
Max. electric input P max [W]
Max. current (5c) I max [A]
Mean speed n [min-1]
Capacitor C [µF]
Max. working temp. tmax [°C]
Air ow max. Vmax [m3/h]
Total pressure max. ∆pt max [Pa]
Static pressure min. (5c) ∆ps min [Pa]
Weight m [kg]
Five-stage controller type
Protecting relay type
Inlet Outlet Surrounding
Point 5b 5b 5b
Total sound power level LWA [dB(A)]
LWA
Sound power level LWAokt [dB(A)]
125 Hz
250 Hz
500 Hz
1000 Hz
2000 Hz
4000 Hz
8000 Hz
Parameters in selected working points 5a 5b 5c 4a 4b 4c 3a 3b 3c 2a 2b 2c 1a 1b 1c
Voltage U [V]
Current I [A]
Input power P [W]
Speed n [min-1]
Air ow V [m3/h]
Static pressure ∆ps[Pa]
Total pressure ∆pt[Pa]
5a 4a 3a
2a
3b 5b
4b
2b
1b
1c 2c 3c 4c 5c
∆pd
1a
5a 4a 3a 2a 3b
5b
4b
2b
1b
1c
2c 3c
4c 5c
∆pd
1a
non-working
area
400 280 230 180 140
1.29 1.39 2.32 0.77 1.11 2.49 0.68 0.98 2.50 0.67 1.06 2.40 0.72 1.18 2.08
248 502 1300 192 418 1037 175 323 882 170 293 634 150 252 412
1476 1440 1326 1453 1385 1152 1437 1376 1056 1395 1297 854 1326 1167 673
0 1400 3195 0 1233 2771 0 964 2528 0 907 2068 0 816 1600
455 474 0 442 441 0 429 425 0 411 374 0 385 304 0
455 476 14 442 443 11 429 427 9 411 376 6 385 305 4
400 280 230 180 140
2.64 2.81 3.90 2.08 2.10 3.90 1.73 1.94 3.90 1.71 2.21 3.90 1.86 2.13 3.90
376 682 2044 419 478 1558 499 601 1390 444 610 1089 413 476 858
1453 1437 1375 1422 1413 1271 1403 1383 1207 1360 1304 1096 1288 1248 945
0 1765 3950 0 1281 3445 0 1344 3099 0 1436 2707 0 1069 2282
561 603 220 532 544 222 519 534 241 498 486 216 439 433 164
562 606 236 533 546 234 520 535 251 500 489 223 440 434 169
LWA 77 83 69
68 66 61
67 67 59
65 75 63
72 79 64
71 77 61
69 75 56
60 66 46
LWA 80 86 71
69 67 62
69 71 61
69 78 66
75 82 65
74 80 63
72 78 59
67 69 49
3× 400 V 50 Hz
1300
2.32
1440
–
40
3195
480
0
33
TRN 4
ATEX therm. relay
3 × 400 V 50 Hz
2044
3.90
1440
–
40
3950
603
220
47
TRN 4
ATEX therm. relay
RP 60-30/28-4D Ex
RP 60-35/31-4D Ex

9
RP fans * - * / * - ** Ex
Air flow max. Vmax [m3/h]
Air flow max. Vmax [m3/h]
Power supply Y
Max. electric input P max [W]
Max. current (5c) I max [A]
Mean speed n [min-1]
Capacitor C [µF]
Max. working temp. tmax [°C]
Air ow max. Vmax [m3/h]
Total pressure max. ∆pt max [Pa]
Static pressure min. (5c) ∆ps min [Pa]
Weight m [kg]
Five-stage controller type
Protecting relay type
Power supply Y
Max. electric input P max [W]
Max. current (5c) I max [A]
Mean speed n [min-1]
Capacitor C [µF]
Max. working temp. tmax [°C]
Air ow max. Vmax [m3/h]
Total pressure max. ∆pt max [Pa]
Static pressure min. (5c) ∆ps min [Pa]
Weight m [kg]
Five-stage controller type
Protecting relay type
Total pressue max. ∆pt max [Pa]Total pressue max. ∆pt max [Pa]
Parameters in selected working points 5a 5b 5c 4a 4b 4c 3a 3b 3c 2a 2b 2c 1a 1b 1c
Voltage U [V]
Current I [A]
Input power P [W]
Speed n [min-1]
Air ow V [m3/h]
Static pressure ∆ps[Pa]
Total pressure ∆pt[Pa]
Inlet Outlet Surrounding
Point 5b 5b 5b
Total sound power level LWA [dB(A)]
LWA
Sound power level LWAokt [dB(A)]
125 Hz
250 Hz
500 Hz
1000 Hz
2000 Hz
4000 Hz
8000 Hz
Inlet Outlet Surrounding
Point 5b 5b 5b
Total sound power level LWA [dB(A)]
LWA
Sound power level LWAokt [dB(A)]
125 Hz
250 Hz
500 Hz
1000 Hz
2000 Hz
4000 Hz
8000 Hz
Parameters in selected working points 5a 5b 5c 4a 4b 4c 3a 3b 3c 2a 2b 2c 1a 1b 1c
Voltage U [V]
Current I [A]
Input power P [W]
Speed n [min-1]
Air ow V [m3/h]
Static pressure ∆ps[Pa]
Total pressure ∆pt[Pa]
5a 4a 3a 2a
3b
5b
4b
2b
1b
1c 2c 3c
4c
5c
∆pd
1a
5a 4a 3a 2a
3b
5b
4b
2b
1b
1c 2c 3c
4c
5c
∆pd
1a
non-working
area
400 280 230 180 140
1.09 1.27 2.00 0.83 1.03 2.00 1.03 1.22 1.90 0.75 0.75 1.55 0.75 0.75 1.27
316 534 1100 246 374 819 382 422 644 188 188 393 154 154 246
948 903 763 905 846 563 819 737 436 804 804 359 700 700 278
0 2035 4108 0 1579 3484 0 1677 2995 0 798 2510 0 706 1943
360 351 150 321 305 43 292 232 0 274 251 0 219 187 0
360 354 160 321 306 50 293 234 5 274 251 4 219 187 2
400 280 230 180 140
2.11 2.45 3.70 1.32 1.89 3.70 1.19 2.12 3.70 1.17 1.83 3.27 1.19 1.62 2.66
419 951 1950 324 678 1483 300 692 1204 279 474 836 239 331 508
980 934 835 951 883 659 930 801 518 888 769 394 821 711 308
0 3006 5829 0 2403 5020 0 2648 4577 0 1777 3775 0 1249 2932
496 475 238 482 416 124 461 350 35 418 304 0 364 250 0
496 477 248 482 417 131 461 352 41 418 305 4 364 251 2
LWA 75 81 66
65 66 56
63 66 56
66 75 60
70 76 62
68 75 56
67 73 55
56 63 40
LWA 75 80 67
69 65 60
64 70 59
67 74 62
68 74 60
68 74 57
64 71 52
54 61 40
3× 400 V 50 Hz
1100
2.00
900
–
40
4108
360
150
44
TRN 2
ATEX therm. relay
3× 400 V 50 Hz
1950
3.70
930
–
40
5829
496
238
68
TRN 4
ATEX therm. relay
RP 70-40/35-6D Ex
RP 80-50/40-6D Ex

10
Installation

RP Ex fans, including other Vento elements and equip-
ment, are not intended, due to their concept, for direct sale
to end customers. Each installation must be performed in
accordance with a professional project created by a quali-
fied air-handling designer who is responsible for proper se-
lection of the fan. e installation and commissioning may
be performed only by a specialized assembling company
licensed in accordance with generally valid regulations.
The fan must be checked carefully prior its installation.
In particular, it is necessary to check the parts and cable
insulation for damage, and to see whether the rotating
parts can rotate freely. e minimum clearance between
the rotating parts (impeller) and the fixed parts (copper
inlet and fan body) is 1% of the diameter of the impeller.
e minimum clearances "U", "V" and "Y" must be checked
at least once a year. Minimum clearances between rotating
and fixed parts are given in Figure 8 and Table 4.
If the RP Ex fan is designed for installation with free
intake or exhaust, it must be protected against the ingress
of foreign particles into the space of the rotating impeller
by a cover grid with a degree of protection min. IP 20 accor-
ding to ČSN EN 60529 in order to ensure protection again-
st the ingress of unwanted particles or objects that could
cause ignition.
If the fan is designed for operation with additional inlet
and/or outlet piping, foreign particles must be prevented
from entering the fan space.
On the suction side, the fan is equipped with a cover
grille located in front of the suction mouth (diffuser). e
cover grille must be conductively connected to the fan hou-
sing.
On the outlet side of the fan, the protective grid is
mounted up to the pipe route at a minimum distance of 0.5
m from the fan (preferably 1-1.5 m to reduce aerodynamic
losses) and is fitted between the flange frames of the metal
air duct. e output protective grid must be conductively
connected to the pipe and the metal casing of the fan
RP Ex.
We recommend adding a 1.5 m long piece of straight
duct to the fan's outlet to get optimal pressure conditions.
In cramped spaces, it is advisable to consider the necessity
to situate directly behind the fan's outlet the duct adapting
piece, attenuator, heat exchanger, heater, etc.
From Figure 11, it is obvious that from the entire cross-
section (e.g. 500 x 250), only about 1/4 of the outlet cross-
section is free. This means that the airflow velocities close
behind the fan can be as much as four times higher than,
for example, in the inlet. Therefore, the greater the distance
of the attenuators (or other resistant elements) from the
outlet, the better. On the inlet side, an elastic connection
will be sufficient as a distance piece in most cases. (Figure
12).
The fan must always be mounted on separate hinges or
foundation so as not to load the elastic connections or the
connected piping.
e installation of the RP Ex fan must be carried out in
such a way that no additional external forces are applied to
its casing that could cause its deformation.
ermistor Protection of Ex Fans

e temperature inside the motors of all RP Ex fans is
permanently read by temperature sensitive sensors (PTC
thermistors) situated in the motor winding. e thermistors
must be connected to the ATEX certified thermistor relay,
that disconnects the contactor switching circuit.
At a maximum, two fans can be connected to the ther-
mistor relay, and they must be connected in series. It is ne-
cessary to be aware of the fact that this type of combined
connection will cause both fans to be stopped even if only
one of the motors fails.
During failure (off) state, ter-
minals 11 and 12 are interco-
nnected.
During failure-free (on) state,
terminals 11 and 14 are inter-
connected.
Figure 7 – Example of the thermistor relay's wiring
STD
TRN
controller
Contactor
3-phase fan motor
ATEX certified thermistor relay
Installation, maintenance, service

11
RP fans * - * / * - ** Ex
Anchoring to the ceiling with steel anchors and sus-
pension using threaded rods (see figure 13), perforated
galvanized strips or ancillary construction (see figure 14) is
recommended for RP Ex fans.
e fans can work in any position. When positioned
under the ceiling, it is advisable to situate the fan with its
cup directed downwards to ease access to the motor ter-
minal box.
If transported air is oversaturated with moisture or if the
risk of intensive and permanent steam condensation inside
the fan exists, it is advisable to situate the fan's motor cap
upwards to enable better condensate drainage!
Before installation, paste self-adhesive sealing onto the
connecting flange face.
To connect individual parts of the Vento system, use
galvanized M8 screws and nuts. It is necessary to ensure
conductive connection of the flange using fan-washers pla-
ced on both sides at least on one flange connection, or use
Cu conductor wiring.
Installation, maintenance, service
Figure 9 – design of the protective grille
Table 4 – Minimum "U", "V" and "Y" clearances
Figure 8 – Minimum "U", "V" and "Y" clearances (view of fan section)
Fan Umin Umax V Y
RP 40-20/20-4D Ex 4 8 15 2
RP 50-25/22-4D Ex 4 8 16 2,5
RP 60-30/28-4D Ex 4,5 8,5 20 4
RP 60-35/31-4D Ex 4,5 8,5 25 4
RP 70-40/35-6D Ex 4,5 8,5 27 4
RP 80-50/40-6D Ex 5 9 29 5
# MIN. U
# MIN. Y
# MIN. V
spiral
diffuser
fan cup
the gap between the impeller
and fan cup (or fan casing)
fan motor stator
fan casing
fan motor rotor rigidly
connected to the impeller
inlet grille inside
the fan
(for suction)
outlet grille in the pipeline

12
To brace flanges with a side longer than 40 cm, it is
advisable to connect them in the middle with another
screw clamp which prevents flange bar gappin (Figure 15).
In the case of applying paint to the outer or inner
part of the fan, the thickness of the paint must not be
greater than 0.2 mm. When repairing a damaged coa-
ting, the existing coating must be completely sanded
and then re-applied to a maximum thickness of 0.2 mm.
It is strictly forbidden to overlap the existing coating!
Installation, maintenance, service
Installation, maintenance, service
e fan basically does not require maintenance. During op-
eration, it is particularly necessary to supervise the proper
functioning of the fan, smooth operation, care for the
cleanliness of the fan and its surroundings, load the fan only
within the range of its performance characteristics.
In the event of a fault, thoroughly check whether the mains
voltage is disconnected. Check that there are no foreign
objects in the fan and that the fan rotates freely. If the fan
does not start again aer powering on, perform the follow-
ing actions depending on the fan protection method:
e rotating assembly must be balanced according to
the quality levels specified in ČSN ISO 14694.
e complete fan must meet the vibration levels recom-
mended in ČSN ISO 14694, corresponding to its size and
use (see ČSN ISO 14694:2014, 8.3 and 8.4).
Check and adjust the balance at intervals according to
the operating conditions of the fan, but at least once a year.
If the fan is protected by the STD protection relay, turn
the fan off and on using the buttons on the protection relay.
If the fan is protected by a TRN controller, turn the fan
off and on with the switch on the remote control of the con-
troller.
If the fan does not start, check the wiring and measure the
resistance of the electric motor winding. If the motor is
burnt, contact your supplier.
Attention! When carrying out maintenance or repairs,
always disconnect the device from the mains!
Figure 13 – Fan anchoring
Dividing partition
Spiral casing
Free outlet
Figure 12 – Application of elastic connections
Figure 11 – Fan outlet arrangement
Figure 15 – screw clamps
Figure 14 – Suspension using ancillary construction
Wiring

e wiring can be performed only by a qualified worker
licensed in accordance with national regulations.
e fans are equipped with a plastic connection terminal
block – Zone 1 environment, II 2G Ex eb IIC T6 Gb.
e terminal box is screwed onto the fan casing and is equi-
pped with screw terminals with a description (Figure 16).

13
RP fans * - * / * - ** Ex
Open the terminal box only in a de-energized state.
Connection to the terminals is carried out according to
the description on the electric motor cables in the termi-
nal box or according to the description of the terminals or
according to the picture on the terminal box cover.
Cables approved for this purpose must be used to co-
nnect the fan's electric motor. See Table 6 for a detailed list
of recommended cables. e fan must be properly groun-
ded.
Aer starting, it is necessary to check the correct direc-
tion of rotation. e direction of rotation of the mounted
fan impeller can be checked by removing the rubber plug of
the inspection hole on the fan bowl, see Figure 17.
Aer starting the fan, it is necessary to measure the cu-
rrent, which must not exceed the maximum permitted cu-
rrent indicated on the production label ( Imax). If the current
values are higher, check the regulation of the pipe network.
e fan is started aer being mounted on the pipe ne-
twork for which it is designed, or choked with closed suc-
tion or discharge so as not to overload the fan!
Attention! e fan is loaded by increasing the flow rate,
i.e. by releasing the throttle.
e installation must comply with the regulations
according to the standard ČSN EN 60079-14 Explosive at-
mospheres - Part 14: Design, selection and establishment
of electrical installations. When designing the installation,
take into account the requirements arising from the Fire
Safety Solution report and the report on the determination
of external influences.
Rubber plug
Rotation direction arrow
Table 6 – Recommended cables
Figure 17
Figure 16 – All-plastic terminal box on the casing
Installation, maintenance, service
Figure 18
K1, K2
– svorky termistorů
motoru
U1, V1, W1
– svorky napájení
třífázového motoru
3f – 3x 400V/50Hz
PE
– svorka pro
ochranný vodič
třífázový motor
ventilátoru
e wiring diagram
of the fan with
upstream elements
(protective relays,
regulators, cont-
rol units) are part
of the assembly
instructions, or pro-
ject from AeroCAD.
RP Ex fans are not intended for direct sale to consu-
mers or to users. ey are sold exclusively in commerci-
al relations to professional assembly companies.
RP Ex fans are manufactured in accordance with valid
Czech and European regulations and European standards.
RP Ex fans must be installed and used only in accordance
with this documentation. Other uses do not correspond to
the intended purpose.
e manufacturer is not responsible for damages
caused by other use and all risks are borne by the user. In-
stallation and operating documentation must be accessible
to operators and service personnel and it is advisable to
place it near the installation. During handling, assembly,
electrical connection, commissioning, as well as repairs and
maintenance of the device, it is necessary to respect the
applicable safety regulations, standards and generally reco-
gnized technical rules.
In particular, it is necessary to use personal protecti-
ve work equipment (gloves) during any manipulation,
assembly, disassembly, repair or inspection due to the
presence of sharp edges and corners.
All equipment connections must comply with relevant
safety standards and regulations.
Changes and modifications that could affect safety are
prohibited. During operation, it is necessary to ensure the
safe and environmentally friendly disposal of all exchangea-
ble parts, operating and auxiliary materials. When disposing
of materials, it is necessary to comply with the relevant
environmental and waste disposal regulations. In the case
of final disposal, it is necessary to proceed according to the
principles of differentiated collection. We recommend han-
ding over metal parts to metal waste collection centers for
scrapping, dispose of other parts according to the rules of
separate collection.
Familiarize yourself before installation and use
and respect the following instructions and recommendati-
ons.
XXXX 4 x 1,5
XXXX 4 x 1,5
XXXX 2 x 5 x 0,35
XXXX 2 x 1,5
XXXX 2 x 0,75
XXXX 2 x 1,5
XXXX 2 x 1,5
XXXX 5 x 2,5

14
A
Fan equipped with thermal protection,
without output control
B
Fan with output control
and protection controller
Figure 19 –Fan connection
Figure 20 – Fan connection
Figure 19 shows the connection of the RP Ex fan in a sim-
ple ventilation device without fan power regulation. is co-
nnection method ensures full thermal protection of the fan
by means of thermistors, ATEX certified thermistor relay*
and STD protection relay. e wiring shown in the pictures
also allows the fan to be switched on and off manually using
the buttons on the STD protection relay.
Aer pressing the black button marked "I" on the STD protection relay,
the fan will start and the button will remain in the pressed position, which
signals the operation of the fan. Pressing the red button marked "0" stops
the fan.
When the motor overheats above 130 °C due to overloading, the resistan-
ce of the thermistors K1, K2 in the motor winding increases several times.
ATEX certified thermistor relay* increased resistance detects and opens
contacts 11, 14. Opening contacts 11 and 14 opens the control coil of the
contactor, which disconnects the power supply of the overheated fan RP
Ex and disconnects the control coil of the STD protection relay circuit TB1,
TB2. e STD reacts to this state by turning off the power supply. Aer
cooling down, the engine will not start by itself. e operator must confirm
the fault by resetting the thermistor relay and then pressing the black
button marked "I" on the STD protection relay.
ATEX
certified
thermistor
relay*
Zone 1
BNV
3× 400 V / 50 Hz
230 V / 50 Hz
230 V / 50 Hz
2,5 V=
2,5 V=
Cable mechanically
protected against
damage
3× 400 V / 50 Hz
230 V / 50 Hz
STD
RP Ex
Figure 20 shows the connection of an RP Ex fan in a ventilation
device with air output regulation using a TRN controller with an
ORe 5 controller.
is connection method ensures, in addition to fan power options
in levels "0" to "5", also its protection by means of thermistors,
ATEX certified thermistor relay and contactor. e wiring shown in
the pictures also allows the fan to be turned off and on manually
from the ORe 5 remote controller, as well as externally with any
switch (explosive gas detector, room thermostat, pressure switch,
hygrostat, etc. in Ex design - terminals PT1, PT2).
By pressing the button on the ORe 5 controller, the fan starts at the selected power
(1 to 5) and the light indicating the operation of the fan lights up. e condition for
the operation of the fan is a closed switch connected to terminals PT1, PT2 and
closed terminals 11 and 14 of the ATEX certified thermistor relay* connected to
the control coil of the contactor. With the switch on terminals PT1, PT2, the fan is
stopped and started without further connections, so that aer starting it runs at the
power set to ORe 5. If this option is not used, it is necessary to connect terminals
PT1, PT2. When the fan is overloaded, as a result of the motor overheating, contacts
11, 14 of the thermistor relay open, then the contactor drops out and the power
supply to the motor is interrupted. e controller reacts to this condition by turning
off the engine power supply and turning off the fan operation light. Aer cooling
down, the engine will not start by itself. First, you need to reset the thermistor relay,
then by switching the controller to the "0" position, confirm that the fault has been
removed (unblocking). en, by switching to position "1" to "5", the fan will start at
the set power. With this connection, the "0" position must not be blocked on the ORe
5 remote controller.
contactor contactor
E.g. explosive gas
concentration detector
Zone 1
BNV
24 V=
2,5 V=
230 V / 50 Hz
3× 400 V / 50 Hz
12 V (24 V=)
24V=
3× 400 V / 50 Hz
ORe 5
RP Ex
TRN
* ATEX certified thermistor relay, e.g. manufacturer type U-EK230E
Ziehl-Abegg. e suitability of using a different type must be consulted with the ma-
nufacturer.
* ATEX certified thermistor relay, e.g. type U-EK230E
manufactured by Ziehl-Abegg. e suitability of using
a different type must be consulted with the manu-
facturer.
ATEX
certified
thermistor
relay*
3× 400 V / 50 Hz

15
RP fans * - * / * - ** Ex
RP (
D
Fan with control unit
and output regulation
Figure 22 shows the connection of the RP Ex fan including the fan
power regulator in a more complex air conditioning device with a
VCS type control unit (e.g. with air heating).
is connection method ensures full thermal protection of the fan
through thermistors and the VCS control unit, which is already
equipped with a thermistor relay (with ATEX certification) from the
factory. e fans are always turned off and on by the control unit.
e protection of the motors must be ensured by the control unit
by connecting the thermistor terminals K1 and K2 to terminals
5a, 5a in the control unit. e internal fan power control is already
built into the control unit (configured) during its manufacture. e
connection of the speed controller mentioned allows the selection
of the fan power in stages "1" to "5".
In connection according to example D (or with a control unit), all
additional functions of the controller must be blocked by connecti-
ng terminals PT2 and E48 in the controller.
e air handling unit is started by the control unit. e regulator control
is built into the control unit. All protective and safety functions of the fans
and the entire system are provided by the VCS control unit.
C
Fan with control unit
without output control
Figure 21 shows the connection of an RPEx fan without air out-
put regulation in a more complex air conditioner with a VCS-type
control unit (e.g. with air heating).
is connection method ensures full thermal protection of the fan
through thermistors and the VCS control unit, which is already
equipped with an ATEX certified thermistor relay from the factory.
e fans are always turned off and on by the control unit. Motor
protection must be ensured by the control unit by connecting the
thermistor terminals K1 and K2 to terminals 5a, 5a, 5b, 5b in the
control unit.
e air handling unit is started by the control unit. All protective and safety
functions of the fans and the entire system are provided by the VCS cont-
rol unit.
Figure 21 –Fan connection
Figure 22 – Fan connection
VCS control unit
(including ATEX certified thermal relay)
VCS control unit
(including ATEX
certified thermal relay)
2,5 V=
3× 400 V / 50 Hz
3× 400 V / 50 Hz
3× 400 V / 50 Hz
24 V=
3× 400 V / 50 Hz
3× 400 V / 50 Hz
2,5 V=
3× 400 V / 50 Hz
TRN–D
2,5 V=
HMI
HMI
Zone 1
BNV
Zone 1
BNV
RP Ex
RP Ex

16
Disposal and recycling
For users from EU countries
When disposing of components and mate-
rials, observe the 2012/19/EU Directive,
applicable national and local environmental
protection and waste disposal regulati-
ons.
For users outside the EU
Observe the applicable local environmental
protection and waste disposal regulations.
Always observe local laws and regulations.
Disposal and recycling

Printing and language mistakes are reserved.
ese Installation and Operating Instructions (as a whole or a part) must not be printed or copied without prior written
permission from REMAK a. s., Zuberská 2601, Rožnov pod Radhoštěm, Czech Republic.
ese „Installation and Operating Instructions“ are the sole property of REMAK a. s.
e up to date version of this document is available at our website: www.remak.eu
Changes reserved.
RPEx-UD-M03-2022-15032022
Issued: 15.03.2022
Montáž, údržba, servis

Notes

Notes

REMAK a.s.
Zuberská 2601, 756 61 Rožnov pod Radhoštěm,
tel.: [phone], fax: [phone],
email: [e-mail], internet: www.remak.eu