Wolf WD-A Troubleshooting guide

AIR HEATER
WD-A, WD-U:
For Recirculating Air,
Mixed Air, Outside Air
for Wall and Ceiling Installation
Operation & Maintenance
Translation of the original operating instruction

22
AIR HEATER WD-A, WD-U
Certificates
Declaration of incorporation
Quality Assurance
Declaration of conformity

33
AIR HEATER WD-A, WD-U
Content
Content
1. Notes and regulations for the operator......................................4
2. Proper Use............................................................4
3. Safety ...............................................................5
4. Goods Acceptance ......................................................6
04.01 Transport Damages ........................................................6
04.02 Indications to Packing (non-returnable)..........................................6
5. Assembly .............................................................6
05.01 Fixing ..................................................................6
05.02 Roof Safeguarding.........................................................7
05.03 Wall and Ceiling Assembly ...................................................7
05.04 Connection Pipes..........................................................7
05.05 Ventilation Valve and Emptying Cock ...........................................8
05.06 Motor Protection Louver ....................................................8
05.07 Lamellae Adjustment, manual.................................................9
05.08 Lamellae Adjustment, automatic ...............................................9
05.09 Lamellae Adjustment, automatic – Adjustment, Function ............................10
05.10 Adjustment Choke Louver with Servo-Motor .....................................10
6. Electrical connections .................................................. 11
7. Switchgear AC ........................................................13
8. Commissioning .......................................................18
08.01 Motor connection ........................................................18
9. Maintenance .........................................................21
09.01 Warranty...............................................................21
09.02 Motor .................................................................21
09.03 Heat exchanger ..........................................................21
09.04 Air filter ...............................................................21
10. Stopping Procedure, Dismantling and Elimination ............................22
10.01 Decommissioning ........................................................22
10.02 Dismantling and disposal ...................................................22

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AIR HEATER WD-A, WD-U
Notes and regulations for the operator / Proper Use
1. Notes and regulations for the operator
Meaning of the operating instructions
Read these operating and maintenance instructions carefully before installation and commissioning to ensure correct
use! We would like to point out that these operating and maintenance instructions only apply to the unit and in no
case to the complete system! All unit-specific data such as order number, energy data, weight, dimensions, etc. can be
found either on the type plate of the respective unit component or in the technical order confirmation. These operating
and maintenance instructions are intended for safe working on and with the above-mentioned unit. They contain safety
instructions that must be observed as well as information that is necessary for trouble-free operation of the unit. The
operating and maintenance instructions must be kept with the unit. It must be ensured that all persons who have to
carry out activities on the unit can consult the operating and maintenance instructions at any time. The operating and
maintenance instructions must be kept for further use and must be passed on to every user or end customer.
Duty of care of the operator
• The contractor or operator must ensure that the equipment and operating materials are operated and
maintained in accordance with the applicable rules and legal regulations.
• The operator is obliged to operate the unit only when it is in perfect condition.
• The unit may only be used for its intended purpose („area of use“).
• The safety devices must be checked regularly for proper functioning.
• The operating and maintenance instructions must always be kept available in a legible condition and complete
at the place of use of the unit.
• The personnel must be regularly instructed in all applicable questions of occupational safety and
environmental protection and must know the operating and maintenance instructions and in particular the
safety instructions contained therein.
• All safety and warning notices attached to the unit must not be removed and must remain legible.
2. Proper Use
Decentral Air Heater for Ventilation and Air-Conditioning of
• Offices
• Meeting and Exhibition Rooms
• Lounges
• Industrial and Production Companies
• Greenhouses
• Sales Rooms, Supermarkets, Shopping Centres
WD-A Units are suitable for
X Supply of air which is
• dust-free
• without pollutants
• non-aggressive
• not developing corrosion
• incombustible
X Preparation of Air for
• Filtering
• Heating
X As well as acc. to the operating parameters determined in the quotation and orders and
on the identification plates, like
• media temperatures, media pressure (air, water, refrigerant, vapour etc.)
• air humidity
Any other use is expressly excluded by us. Other uses require the prior agreement or approval of the manufacturer.
RLT-machines for supplying combustible or explosive gases, vapours, mists or dusts must especially be rated.
Without respective remark in our technical ratings, standard air heaters must not be operated in these
danger zones.

5
03
5
AIR HEATER WD-A, WD-U
Safety
3. Safety
The authorized specialized staff charged with
• assembly
• commissioning
• maintenance
must be informed about the observance of these operating instructions without starting work.
Non-observance of the operating instructions can endanger the persons charged with this work
and can damage the machine.
Attention!
Work on air heaters must be started or done only when the following functions are fulfilled:
• Repair switches fixed at the machine are connected to the circuit
• Power supply is dead on all poles
• Power-operated, rotating parts are secured against re-starting (repair switch lockable)
• standstill of the rotating parts
• machine components have cooled down to normal ambient temperatures (room temperature)
Attention!
Only qualified, specialized staff must be charged with work on electric components.
The local EVU- and VDE-regulations have to be observed.
The RLT-machine must not be modified nor added, since otherwise the manufacturer’s
conformity declaration will expire!
Symbols:
Opposite symbol is indicated in the operating instructions at any place
where in case of non-observance
• there is danger to life and limb of persons
• damages of the machine can occur.
Opposite symbol is indicated in the operating instructions at any place
where there is danger from electric components.
Opposite symbol is indicated in the operating instructions at indications
which must not be realized.
Opposite symbol in the operating instructions indicates guidelines or cross-references
which are important for the operation of the RLT-plant.
Opposite symbol in the operating instructions indicates
information or application tips.

6
04 / 05
6
AIR HEATER WD-A, WD-U
Goods Acceptance / Assembly
4. Goods Acceptance
04.01 Transport Damages
Unpack the goods in the driver’s presence and check them acc. to our delivery note regarding completeness
and damage. Transport damages must be confirmed by forwarder (date and signature). Later complaints will be refused
by forwarding insurances.
04.02 Indications to Packing (non-returnable)
The packing is a mere transport packing. Its quantity has been reduced to the indispensable minimum in order to be
able to transport and unload the high-grade parts without damage.
The material can be completely recycled and thus can be given to reutilization. The elimination costs now as before
have to be borne by the consignee of the goods.
As an alternative, it is possible to return the packing material to us. The transport costs have to be borne by the consi-
gnee of the goods. Please note that the packing material must not be contaminated and must be brought separated in
groups.
5. Assembly
05.01 Fixing
The installation of the unit may only be carried out by qualified personnel. The qualified personnel are obliged to
comply with the general accident prevention regulations (e.g. UVV in Germany) and to wear the necessary personal
protective equipment.
The units have to be fixed at the wall (to be provided by customer) with fixing material approved by the Building
Supervisory Board (dowels, screws) acc. to the wall construction. Weights of the respective unit combination
cf. WD-A-catalogue.
Unit assembly with
• sheet bracket Order No. 650 (for wall and ceiling when using
the motor protection louver => page 8)
• sheet brackets Order No. 651 (for wall and ceiling)
• ceiling suspension Order No. 6531 + D (ceiling).
The supplied suspension devices have got spezial sockets.
Bracket fixing at the unit:
1. Loosen hexagonal screws on one side ~3 mm.
2. Insert sheet bracket or ceiling suspension with large boring
by hexagonal screws and pull it towards the back, so that
screw is in the small slot.
3. Press washer to the WD-A-housing .
4. Tighten firmly hexagonal screw .
Unit assembly with accessories without sheet brackets, ceiling suspension.
When using the following accessories, the unit can be fixed without sheet brackets or ceiling suspension.
511 - Mised air part | 521 - Recirculating air part | 530 - Outdoor air section | 541 - Filter part
Connection of Unit Parts (Accessories)
Glue one sealing strip 12 x 6 mm to one
frame profile of each connection flange.
= sheet screw 6,3 x 13
= hexagonal screw M 6 x 16,
with washer, spring washer and nut.
2
4
3
1
2
2
1
1

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05
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AIR HEATER WD-A, WD-U
Assembly
Attention:
When using accessories, outside air operation is possible, so:
• Provide an anti-frost thermostat at the heat exchanger.
• All ducts transporting outside air must be insulated inside the building on the outside in order to avoid deposit
of moisture.
05.02 Roof Safeguarding
The roof safeguarding for accessories led through the roof – rain hood or ducts – must be provided by customer. Roolf
safeguardings are not included in the scope of supply
05.03 Wall and Ceiling Assembly
Typ WD-A 100 200 300 400
A240 2x185 2x210 3x183
B480 610 760 890
D620 620 620 620
E105 105 155 155,5
C320 320 320 320
The static stressability of the wall or ceiling construction must be checked by customer.
Fixing at the wall or ceiling must be effected with fixing elements (dowels, screws) approved by the Building
Supervisory Board.
For suspensions with larger distance, additional flat irons can be ordered.
05.04 Connection Pipes
Order No. 653-I
Clamping range
of the support claw
0 - 15 mm
Order No. 651
2 sheet brackets short
Order No. 653-D
475 mm in
basic version
460 mm in
basic version
D
B
C
E A E
Order No. 651
2 sheet brackets short
Order No. 650
2 sheet brackets long
Connection left-hand (standard design)
for pump warm water, pump hot water, thermal oil
Connection right-hand (standard design)
for pump warm water, pump hot water, thermal oil
Connection right-hand (spezial design)
for vapour
Standard design cannot be used
Connection Ceiling Unit
for pump warm water, pump
hot water, thermal oil
and steam
for pump warm water, pump hot water,
thermal oil
V = advance R = return
for vapor
K = condensate discharge D = steam entrance
R / D
V / K
R / D
V / K
V / D
R / K

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05
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AIR HEATER WD-A, WD-U
Assembly
Important:
In case of steam, pay attention that the heat exchanger is installed absolutely horizontally or in steam direction with a
slope of 1 % to condensate discharge, respectively. There must be no condensate acculumation in the heat exchanger.
An efficient ventilation has to be provided.
Pay attention to the condensate discharge manufacturer’s
assembly instructions.
Due to insufficient emptying and ventilation,
Connections towards above or below are not possible.
Do not twist connection piece!
(This will destroy the heat exchanger. No warranty).
When fixing screwed flanges at the advance and return of
the heat exchanger, hold against with a suitable tool.
For later inspection work, it is purposeful to provide a slide
valve in front ot the heat exchanger.
Remove the protection caps from the connecting pipes.
Important: Connect the machine acc. to the counterflow
principle. Advance and return cf. 05.04.
Frost protection for heat exchanger:
In case of outside air operation, provide anti-frost thermostat on the air exit side of the heat exchanger!
05.05 Ventilation Valve and Emptying Cock
Pay attention that the ventilation valve is installed at the highest point. Arrange the emptying cock at the lowest point,
so that a complete emptying of the heat exchanger is possible. As a precaution, blow through the heat exchanger with
compressed air in order to achieve a complete emptying (frost protection).
05.06 Motor Protection Louver
The installation of the motor protection louver is necessary in case of
higher heating media in order to protect the fan motor from overhea-
ting when it stands still. The thermo-contacts integrated in the motor
would react and stop the motor. Therefore use motor protection louver
in case of high advance temperature of the heating medium. Without
motor protection louver, WD-A-machines may be operated up to an
advance temperature of the heating medium of:
Wall Machine Ceiling Machine
without accessories
(free suction- extraction)
130 °C 120 °C
with accessories (at the suction) 120 °C 120 °C
In case of higher heating media from pump hot water 130 /100 on,
from vapour 4 bar on, the motor protection louver (order No. 595)
must be installed between heat exchanger and motor.
Attention: When using the motor protection louver, the sheet bracket
long (order No. 650) is required for wall and ceiling assembly.
Additional measures / replacement measures:
• If the operation is unregulated by the heating medium, install
motor protection louver.
• If the operation is regulated by the heating medium, provide
fan disconnection, when the regulation valve is closed.
Especially in case of an advance temperature of the heating
medium of more than 180 °C, to be provided by all means.
Apart from the motor protection function, the motor protection louver
can also be used as frost protection flap at machines with pure outside air operation.
Function: Fan off - motor protection louver (frost protection flap) closed.
300 mm

9
05
9
AIR HEATER WD-A, WD-U
Assembly
05.07 Lamellae Adjustment, manual
1. First bend lamella manually into the requested position.
2. Adjust remaining lamellae manually.
In case of corrections of the adjustment angle, the lamellae can be bent several times without problems.
Attention!
Blow-out louver 503-W is installed behind the blow-out louvers 500-W, 501-D.
Firstly adjust lamellae 500-W, 501-D, then proceed with 503-W as described above.
05.08 Lamellae Adjustment, automatic
Energy-saving louver 505-W/506-D-S, with switching device 678, prevents drifting of the primary air stream by high
temperature difference between primary air and room air.
By using the energy-saving louver, the drifting (thermal lift) of the primary air stream, especially during the heating-up
period, can be opposed. In choke position, there are single air jets, so that secondary air (room air) is mixed to the pri-
mary air stream. Thus, the air inlet - primary air stream is increased and cooled in the core.
By the control device (order No. 678), the temperature difference between nominal and real value of the room tempe-
rature is permanently determined.
Acc. to the determined difference as well as the adjustment at the control device (steepness of the control curve), the
servo-motor for the choke louver is activated.
> high temperature difference = choke position
< low or no temperature difference (heating-up finished) = unchoked position.
1
1 1
1
1
1
1
1
1
Blow-out louver
basic version Nr. 500 WD
Secondary air
No. 504
Blow-out louver
ceiling 4-directions No. 502 D
W D
Blow-out louver
rotated 90° No. 503 W
usable with 500 WD

10
05
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AIR HEATER WD-A, WD-U
Assembly
05.09 Lamellae Adjustment, automatic – Adjustment, Function
Function:
The nominal temperature (5 - 40 °C) is adjusted at the outside scale. The steepness of the control curve (spread) can be
adjusted inside the housing.
According to the determined temperature
difference between nominal and real value
of the room temperature as well as adjusted
spread of the control curve, the servo-motor
for the choke louver is activated.
When the room temperature exceeds the
adjusted nominal value, the flap is completely
open.
Example:
Hall temperature (nominal value adjustment)
18 °C / Spread 10 K
Flap choked up to ... 8 K
Flap opened > 8 °C
Flap completely opened at 18 °C
05.10 Adjustment Choke Louver with Servo-Motor
In order to achieve a low resistance with
opened choke louver, the choke louver should
stand parallel to the adjustment louver.
1. Adjustment of Steering Louver
Adjust steering louver L to the requested
blow-out direction of the primary air stream
and fix it with clamping device F.
2. Adjustment of Choke Louver
Open the box. Adjust Nominal Value
Potentiometer to left, to 5 °C.
Adjust the requested spread 1 - 10 by the
internal knob ( Spread = Spreizung ). Now
the servo-motor opens the choke louver D.
After about 2 - 3 minutes, the position of the
choke louver can be adjusted parallel to the
steering louver by the knob ( max. opening
angle of Flap ).
Adjust the knob ( min. opening angle of
Flap ) to left stop. Close the box.
Now the room temperature can be adjusted
at the Nominal Value Potentiometer, the sys-
tem is ready for operation.
Operating Elements:
Adjusting Knob Nominal Temperature ( adjustable outside and inside )
Adjusting Knob Spread ( adjustable in opened box, only )
Adjusting Knob Min. Opening Angle ( adjustable in opened box, only )
Adjusting Knob Max. Opening Angle ( adjustable in opened box, only )
For detailed information see the instruction sheet enclosed with the control box.
100 %
80 %
60 %
40 %
20 %
6 °C8°C 10 °C 12 °C 14 °C 16 °C 18 °C 20 °C
Open
Closed
Spread 4K
Spread 6K
Spread 8K
Spread 10K
LF
D

11
06
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AIR HEATER WD-A, WD-U
Electrical connections
6. Electrical connections
06.01 Parallel connection of WD units
Connecting the unit to the mains, electrical installation or repair work may only be carried out by qualified personnel.
Qualified personnel are obliged to comply with the general accident prevention regulations (e.g. UVV in Germany) and
to wear the necessary personal protective equipment.
9-core
9-core
9-core
Fan motor 1 Fan motor 2 o. X
TK=Thermal contact TK=Thermal contact
Switchgear 670 - 671
5-core
5-core
5-adrig
Fan motor 1 Fan motor 2 o. XTK=Thermal contact TK=Thermal contact
Switchgear 685/52-54 E
7-core
7-core
7-core
Fan motor 1 Fan motor 2 o. X
TK=Thermal contact TK=Thermal contact
Switchgear 685/55-58D u. 683/56D / 58D
Clip box and wiring to be provided by
customer!
Attention! Max. number of fan motors
on one switching device: cf. table in these
operating and maintenance instructions.
The cable cross-sections are guidance
values and must be adjusted to the valid
VDE-regulations VDE 0100 and the TAB.

12
06
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AIR HEATER WD-A, WD-U
Electrical connections
06.02 Repair switch
06.03 Maximum number of WD units on one switching device
Switchgear
Typ WD
101 201 301 401 102 202 302 402 103 203 303 403 106 206 306 406
670 50 20 14 650 20 14 6
671 50 20 14 650 20 14 6
676 50 20 14 6
677 1 1 1 1
685 / 52 E 7 1 1
685 / 53 E 15 3 3 1
685 / 54 E 24 6 5 3
685 / 55 D 5 2 1
685 / 56 D 10 4 2 1
685 / 57 D 20 8 5 2
685 / 58 D 35 14 10 4
685 / 57Ex D 2 2 2 2
Switchgear EC WD 10E WD 20E WD 30E WD 40E
690-EC 15 15 15 15
691-EC 15 15 15 15
692-EC 15 15 15 15
2 speeds
Y - circuit: low speed
Δ - circuit: high speed
TK= Thermal contact (TOP)
Motor 001 Motor 003
brown blue black orange
brown orange blue
black
white white
red grey white white
1 speeds
Counterclockwise rotation
TK=Thermal contact (TOP)
Repair switch 9-pole
Repair switch

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07
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AIR HEATER WD-A, WD-U
Switching Devices
7. Switchgear AC
07.01 Switchgear, 2 speeds 400 V (motor 001)
07.02 Automatic switchgear, 2 speeds 400 V (motor 001)
Order no. 676
Room thermostat
TK=Thermal contactMotor
Power supply
Back-up fuse
on site
5-core 9-core
If automatic restart after motor
fault is required, insert bridge.
If automatic restart after motor fault
is required, insert bridge.
Contact load
max. 250V 1A
ServomotorRT=Room thermostatTK=Thermal contactMotor
Power supply
Back-up fuse
on site
5-core 9-core 4-core
5-core 9-core 4-core
Power supply
Back-up fuse
on site
RT=Room thermostatTK=Thermal contactMotor
Order no. 670
Order no. 671

14
07
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AIR HEATER WD-A, WD-U
Switching Devices
07.03 5-step switchgear, 5 speeds 400 V (motor 001)
07.04 5-stage switchgear, 5 speeds 230 V (motor 003)
12
11
14
N L L
Motor M1
Power supply
Back-up fuse on site
5-adrig
FS=Frost protection thermostat
RT=Room thermostat
TK=Thermal contact
Order no. 685 / 55-56-57-58 D
U1
U2
11
12
14
1 2 3 6 7
250 V AC
max. 2A
250 V AC
max. 1A
4 5 L1 N
M
1 ~
U1
U2
11
12
14
N L
L RT RT
250 V AC
max. 2A
250 V AC
max. 1A
FS FS TK TK
L1 N
M
1 ~
Power supply
Back-up fuse
on site
Power supply
Back-up fuse
on site
3-adrig
3-adrig
Order no. 685 / 52-53 E-FK
Order no. 685 / 54 E-FK
RT=Room thermostat
TK=Thermal contact
RT=Room thermosta
FS=Frost protection thermostat
TK=Thermal contact
RT
RT FS TK
TK

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07
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AIR HEATER WD-A, WD-U
Switching Devices
07.05 Switchgear with servomotor
continuous 515
Switchgear
position “0“
Servomotor
position “Closed“
Switchgear
position “0“
Servomotor
position “Closed“
N671 14L-- 11
685 / 54 E
685 / 55-58 D
685 / 52-53 E 114 112 3
N L 123 5
2
SGF / SGA
31
NL-- 14 11
NL-- 14 11
Position transmitter
Servomotor continuous 515
N
L- -
L---
671
685 / 54 E
685 / 55-58 D
1 3 2
685 / 52-53 E
1 3 2
14 12 11
N
L- -
L---
14 12 11
N
L- -
L---
14 12 11
Servomotor On / Off 517
13
14
21
22
13
14
21
22
707
ON
OFF
N14 12
671
N
685 / 54 E
685 / 55-58 D
1 2
685 / 52-53 E
132
11 L--
14 12 11 L--
14 12 11
Servomotor 517
13
14
21
22
13
14
21
22
ON
OFF
Servomotor On / Off 517
132
230 V / 50 Hz
707
07.06 Switchgear with
servomotor ON / OFF 517
07.07 Switchgear with
control unit 707 and
servomotor ON / OFF 517
07.08 Switchgear with room
thermostat and servomotor
ON / OFF 517

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07
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AIR HEATER WD-A, WD-U
Switching Devices
Power supply on site
230V or 400V
*Bridge release
in fan terminal box
24V or 10V to D1
(if available)
Supply line
230V
Option
on site
Power supply on site
230V or 400V
Temperature sensor
Operating signal
pot. Free
*Bridge release
in fan terminal box
24V or 10V to D1
(if available)
EC fan
terminal box
Max. 15 fans!
If present,
remove jumper
Option
Max. 15 fans!
Option
Room thermostat
681/682/682-I
Contact 2-3 closed = heating
Contact 2-1 closed = cooling
Clock thermostat
684.1
Contact 1-3 closed = heating
Contact 1-2 closed = cooling
Power supply on site
230V
Option
Option
Power supply on site
230V bzw. 400V
*Bridge release
in fan terminal box
24V or 10V to D1
(if available)
Power supply on site
230V bzw. 400V
EC fan
terminal box
EC fan
terminal box
ext. release /
frost protection
*Bridge release
in fan terminal box
24V or 10V to D1
(if available)
Option
on site
If present,
remove jumper
If present,
remove jumper
07.09 Switchgear with EC controller 690 EC
07.10 Switchgear with EC controller 691 EC

17
07
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AIR HEATER WD-A, WD-U
Switching Devices
07.11 Switchgear with EC controller 692 EC with damper actuator
If present,
remove jumper
Switch
On/Off
Zuleitung
230V
If present,
remove jumper
If present,
remove jumper
OptionOption
Room thermostat
681/682/682-I
Contact 2-3 closed = heating
Contact 2-1 closed = cooling
Clock thermostat
684.1
Contact 1-3 closed = heating
Contact 1-2 closed = cooling
Power supply on site
230V
Option
Option
Option
on site
Damper actuator
517
Damper actuator
517
Option
ext. release /
frost protection
Zu Zu
Auf Auf
Power supply on site
230V or 400V
Damper actuator
515
Option
Position transmitter
705
Option
*Bridge release
in fan terminal box
24V or 10V to D1
(if available)
EC fan
terminal box
Power supply on site
230V or 400V
*Switching fault
signals in series
Collective fault
signal fans
Speed
controller
*Bridge release
in fan terminal box
24V or 10V to D1
(if available)
EC fan
terminal box
Option
on site
Max. 15 fans!

18
08
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AIR HEATER WD-A, WD-U
Commissioning
8. Commissioning
08.01 Motor connection
Commissioning may only be carried out by qualified personnel. The qualified personnel are obliged to comply with the
general accident prevention regulations (e.g. UVV in Germany) and to wear the necessary personal protective equip-
ment.
Attention!
When commissioning the unit, the designed limits (see information on the type plate on the unit) must not be excee-
ded. No warranty is given for any consequential damage resulting from this.
In addition, the individual operating and maintenance instructions for the built-in parts or supplied parts must be observed.
The rated voltage specified on the type plate applies. Three-phase motors designed for a nominal voltage of 400 V can
be used in the range 400 V + 6 / - 10 % according to DIN / IEC 38, single-phase AC motors 230 V in the range 230 V
+ 6 / - 10 %.
Connecting cable made of EVA ethylene vinyl acetate hose cable 4 GJ1 according to VDE 0208 / 3.69. This cable is
approved for operating voltages up to 500 V, the thermal resistance is max. 120 °C. The cable construction complies
with VDE 0282 part 804.
All motors are fully protected by thermal contacts. If the permissible temperature limit of 135 °C is exceeded (e.g. due
to excessive ambient temperature, heating up due to high heating medium temperatures), these contacts come into
action and switch off the motor.
This full motor protection is only achieved with our switchgear.
No motor guarantee can be given when using third-party products.
Attention! The operator must have the equipotential bonding of the unit connected to the on-site
equipotential bonding system by a qualified electrician in accordance with the legal requirements,
standards and guidelines and ensure proper functioning. Mounted equipotential bonding must not be
removed.
Important: Switching capacity: 10 A at cos = 1,0
6 A at cos = 0,6
Rated voltage: 250 V
Dielectric strength: 2 000 V eff.
If the full motor protection is activated, the motor should only be put back into operation after it has cooled down and
the selector switch on the switchgear has been reset to zero (except switchgear 670.1).
After connection, check the direction of rotation of the fan. Fan runs correctly when air comes out of the blind frame.
Change the direction of rotation by exchanging 2 phases. When connecting the switchgear and motors, observe the
local regulations.
Motor 001 / 006
Motor with 2 speeds
by Y /change-over
with thermal contact,
Change of direction of rotation
by reversing 2 phases.
Without bridge when using speed
changeover switch.
Motor 002
Motor with 2 speeds
by Y /changeover
with PTC thermistor,
change of direction of rotation
by reversing 2 phases
Without bridge when using speed
changeover switch.
Motor 003
Motor with 1 speed
and operating capacitor
with thermal contact,
change of direction of
rotation see circuit.
High speed
- circuit
High speed
- circuit
Anticlockwise rotation Clockwise rotation
Low speed
Y - circuit
Low speed
Y - circuit

19
08
19
AIR HEATER WD-A, WD-U
Commissioning
08.02 Fan connection EC with repair switch
08.03 Fan connection EC with terminal box
-Circuit diagram_1
-KK
EC-Motor
EC-Motor
Fan supply line
400V
Fan fault signal
(L1 Fan) (L2/N Fan) (L3 Fan) (PE Fan) (NC Fan) (COM Fan) (NC Float) (COM Float) (L Pump) (N Pump)
(brown/blue) (blue/blue) (black/black) (grey/red) (red) (blue) (yellow) (white) (brown) (red) (blue) (green) (yellow) (white) (black) (brown) (brown) (red) (blue) (green) (yellow) (red) (blue) (yellow) (orange) (white1) (white2) (white1) (white2) (white1) (white2) (white1) (white2)
(24V) (10V) (GNC) (D1) (E1) (Tacho) (RSA/A Modbus) (RSB/B Modbus)
Fault signal
condensate pump
Freigabe
Release only required for circuit diagram_3
and circuit diagram 4
Speed setting
0-10V
or
Speed setting
via potentiometer
Circuit diagram_3:
Circuit diagram_4:
Condensate pump
supply line
Fan supply line
230V
On-Site
Option
Condensate pumpFan
EC-Motor EC-Motor EC-Motor
-Circuit diagram_2 -Circuit diagram_3 -Circuit diagram_4
-Circuit diagram_1
-KK
EC-Motor
EC-Motor
Fan supply line
400V
Fan fault signal
(L1 Fan) (L2/N Fan) (L3 Fan) (PE Fan) (NC Fan) (COM Fan) (NC Float) (COM Float) (L Pump) (N Pump)
(brown/blue) (blue/blue) (black/black) (grey/red) (red) (blue) (yellow) (white) (brown) (red) (blue) (green) (yellow) (white) (black)
(brown)
(brown) (red) (blue) (green) (yellow) (red) (blue) (yellow) (orange) (white1) (white2) (white1) (white2) (white1) (white2) (white1) (white2)
(24V) (10V) (GNC) (D1) (E1) (Tacho) (RSA/A Modbus) (RSB/B Modbus)
Fault signal
condensate pump
Freigabe
Release only required for circuit diagram_3
and circuit diagram 4
Speed setting
0-10V
or
Speed setting
via potentiometer
Circuit diagram_3:
Circuit diagram_4:
Condensate pump
supply line
Fan supply line
230V
On-Site
Option
Condensate pumpFan
EC-Motor EC-Motor EC-Motor
-Circuit diagram_2 -Circuit diagram_3 -Circuit diagram_4

20
08
20
AIR HEATER WD-A, WD-U
Commissioning
08.04 Assignment of fan connection EC with repair switch
Unit type Wiring diagram number Supply voltage
12 E, 13 E, 14 E 4230
22 E, 23 E, 24 E 4230
32 E-E, 33 E-E, 34 E-E 2230
32 E-D, 33 E-D, 34 E-D 2400
42 E-E, 43 E-E, 44 E-E 1230
42 E-D, 43 E-D, 44 E-D 1400
The nominal voltage specified on the type plate applies. Three-phase AC motors designed for a nominal voltage of
380 V can be used in accordance with DIN / EC 38 in the range 400 V + 6 / - 10 %, single-phase AC motors 220 V
in the range 230 V + 6 / - 10 %.
Connecting cable made of EVA ethylene vinyl acetate hose cable 4 GJ1 according to VDE 0208 / 3.69. This cable is
approved for operating voltages up to 500 V, the thermal resistance is max. 120 °C. The cable construction complies
with VDE 0282 part 804.
All motors are fully protected by thermal contacts. If the permissible temperature limit of 135 °C is exceeded (e.g.
due to excessive ambient temperature, heating up due to high heating medium temperatures), these come into
action and switch off the motor.
Work on electrical installations may only be carried out by a qualified electrician.
• A repair switch must be fitted to each unit in order to be able to switch off all poles of the drive
motor without voltage during maintenance work.
• Only operate motors when the blow-out blinds and motor protection blinds are open.
• The motors, switchgear and other electrical accessories must be connected in accordance with the relevant
standards (VDE 0100; EMC law; regulations of the power supply company).
• No frequency converters should be used for speed control, as this can lead to increased heating of the motor
in the lower speed range. The motors are voltage controllable, i.e. their speed range can be controlled via
transformer control units or phase angle control.
• Ambient air intake temperature maximum 40 °C.