Schako NOVENCO NOVA VMA Instruction Manual

Pure competence in air.
ENGLISH 918027-0
NOVENCO® NOVA™ AIR HEATERS
VMA/VMB
INSTALLATION AND
MAINTENANCE

918027-0
GB
2
MU16190 0423
Novenco®NoVa™ air heaters type VMA and VMB
Installation and maintenance
Contents
1. Application
1.1 Reading guide
2. Product overview
2.1 Scope of delivery
2.2 Mounting positions
2.3 Storage
3. Installation
3.1 Assembly and mounting
3.2 Pipe circuit construction
3.3 Connection of heating medium
3.4 Regulation and frost protection
3.5 Electrical connections
4. Maintenance
4.1 Inspection
4.2 Cleaning
4.3 Impeller
4.4 Motor
4.5 Heating coil
4.6 Damper
4.7 Filter
4.8 Other components
5. Electrical connection
5.1 Motors
5.2 Regulators
5.3 Re-configuration of NV515 – 5-step
5.4 Wiring diagrams
6. Troubleshooting
7. Inspection and test
8. Sound
9. Safety
10. Disposal
11. Patents and trademarks
12. Quality management
13. Warranty
14. Spare parts
15. Product lifetime
16. Declaration of conformity
Appendices – wiring diagrams
A. Thermostats RDG100T and NV515
B. RDG100T – 5-step regulators
C. RDG100T – stepless regulator 2.5 A
D. RDG100T – stepless regulator 5 A
E. NV515 – 5-step regulators
F. NV515 – stepless regulator 2.5 A
G. NV515 – stepless regulator 5 A
1. Application
The Novenco NoVa air heaters type
VMA and VMB are for heating of
large areas such as industrial work
zones, workshops, halls,
warehouses, large sports centres etc.
1.1 Reading guide
This guide covers the installation
and maintenance of Novenco NoVa
air heaters type VMA and VMB as
well as original accessories. Please
study the guide and read sections
relevant to the work at hand in full.
2. Product overview
The air heater consists of a basic unit,
which can be fitted with accessories
for air distribution on the outlet side.
Legend for figure 1
1. Fan suspension and wire mesh
2. Motor and fan
3. Heating coil
4. Cabinet
5. Mounting brackets
Legend for figures 2 and 3
1. Basic unit with fan and heating
coil
2. Front grille J1 - with individually
adjustable-louvres
3. Front grille J2 - with individually
adjustable louvres in two
directions
4. Mixing housing in three designs
•B3, without damper, only for
connection of return air
•B13, with inter-connected
dampers on top and bottom
for fresh and return air
•B23, with inter-connected
dampers on the reverse side
and bottom for fresh and
return air
5. Return air duct
6. Filter section F
7. Fresh air duct - for intake of fresh
air through roof
8. Fresh air hood H
9. Wall grille M - for intake of fresh
air directly into the mixing
housing
10. Air diffuser J4 - for horizontal air
distribution in four directions
with vertical supply
11. Air cone K - for jet- shaped air
distribution in high-ceiling rooms.
Icons Description
Risk of damage to equipment
Risk of injury or death
Table 1. Icons in guide
Figure 1. Basic unit

3
5
1
2
4
Inlet
Figure 2. Horizontal position
2
1
7
8
9
4
5
6
5
Inlet
Outlet

3
Accessories for recirculation and
mixing of fresh and return air are
mounted on the inlet side.
The basic unit consists of a cabinet
with heating coil and axial flow fan.
The fan motor is on the inlet side.
Pipe connections for the heating
medium are on the cabinet side.
The fan motor is fitted with 1.5 m
cable.
The VMA is for water from boilers or
heat pumps with temperature drops
of 10 to 20 °C.
The VMB is for water from district-
heating systems with temperature
drops of 40 °C.
Refer also to the technical
calculation.
2.1 Scope of delivery
The basic unit and accessories are
delivered in cartons. Ducting is
outside the scope of delivery.
Included with the basic unit
•2 mounting brackets for
installations without
accessories on the inlet side
•A drilling template for
mounting brackets
•Self-tapping screws for
mounting of accessories on the
outlet side
If a Novenco mixing housing is part
of the delivery, it comes with two
mounting angles. These angles are
screwed onto the open ends of the
housing during transport.
If a Novenco fresh air hood is part of
the delivery, it comes with
supporting fixtures and clamping
bolts for hood and duct.
2.2 Mounting positions
The units are for wall mounting
(horizontal inlet) or roof mounting
(vertical inlet) with optional location
of the pipe connections for water on
the vertical sides of the fan.
2.3 Storage
Store air heaters correctly to ensure
function and durability.
Damages due to incorrect
storage void the warranty.
3. Installation
3.1 Assembly and mounting
Before mounting, screw the air
distribution accessories onto the
outlet of the basic unit using the
supplied screws.
The natural frequency of the surface
the fans are mounted onto must be
20% higher than the fan speed.
No accessories on inlet side
– wall or ceiling mounting
1. Screw the mounting brackets
onto the basic unit.
Eight screws for mounting in the
corners of the unit on the inlet
side areincluded. The position of
the brackets is identical for both
wall and ceiling mounting.
2. Mark holes for mounting on the
wall or ceiling surfaces using the
included template sheet.
Note: The underside of wall-
mounted units must be at
least 2.2 mabove the floor.
3. Drill holes for M8 size bolts.
Figure 3. Vertical position
1
3
10
11
Types Weights [kg]
VMA/B 42-43 20
VMA/B 52-53 30
VMA/B 62-63 40
VMA/B 72-73 50
VMA/B 82-84 67
Table 2. Maximum weights of base
units
Conditions Specifications Comments
Outdoor One month • Packaging must be
intact
Indoor or
sheltered
Max. six
months
• For unprotected air
heaters with no or
broken packaging
• Ventilated location
• No condensation
Prolonged Max.
two years
• Indoor
• Remove packaging
• Ventilated location
• No condensation
• Turn impeller
20 times every six
months
Vibrations No • Location must be
vibration free
Tempera-
tures -20 to 55 °C
• Constant
temperature,
preferably 20 °C
• Ventilated
• No condensation
Humidity Below 70%
• Avoid condensation
• Exceedance
requires airtight
packaging of
complete air heater
and use of a
moisture absorbent
agent such as silica
gel
Table 3. Storage recommendations

Types Frequency [Hz] RPMs
VMA/B 42-43 50 / 60 1350 / 1490
VMA/B 52-53 50 / - 1300 / -
VMA/B 62-63
50 / 60
1320 / 1450
VMA/B 72-73 910 / 980
VMA/B 82-84 920 / 1080
Table 4. Fan RPMs
Figure 4. Wall mounting
Figure 5. Ceiling mounting
Mounng
brackets
Mounng
brackets

4
4. Lift the unit into position and
support it.
5. Tighten the fastening bolts and
screws carefully.
For non-supporting ceilings M8
threaded rods with discs and
nuts can be used for suspension
in sectional frames attached to
supporting parts.
A Novenco mixing housing and
accessories on inlet side - wall
mounting
1. Mark holes for mounting on the
wall surfaces using the included
template sheet.
Note: Wall-mounted fans must
be at least 2.2 m above the
floor from the underside.
2. Drill holes for M8 size bolts.
3. Mount one of the two mounting
angles on the wall to support the
second bracket.
4. Secure the other mounting angle
to the top plate of the mixing
housing with the three screws.
5. Remove the screws at the bottom
of the mixing housing.
6. Mark the three upper mounting
holes on the wall using the
mixing housing.
7. Mount the mixing housing with
the four supplied fixtures.
8. Assemble the basic unit with the
mixing housing using the
supplied screws.
9. Pull the motor cable through one
of the cable inlets on the access
side. See figure 6.
10. Mount the entire unit on the wall
in the upper mounting angle
11. Re-insert the screws in the
bottom plate of the mixing
housing through the lower
mounting angle.
12. Push the connected ducts across
the duct connections of the
mixing housing.
13. Attach the ducts by means of
self-tapping screws.
The return air duct should be
supported against the wall.
14. Mount regulators on the damper
shafts of the mixing housings.
Manually operated hand
regulators are mounted directly
onto the shafts.
Motor-driven regulators for
automatic operation are
mounted onto the shafts
according to the motor
supplier’s instructions.
A slot at the end of the damper
shaft marks the position of the
dampers plate. See figure 6.
15. Mount the filter section in the
return or fresh air duct with U-
cleats.
Note: An arrow on the filter
front should indicate the
air direction.
A Novenco mixing housing and
accessories on inlet side - ceiling
mounting
1. Assemble fan, mixing housing
and mounting angles on the
floor.
2. Hoist the assembly into position.
M8 lifting eyes can be placed in
the mounting brackets.
3. Attach the unit to the ceiling.
4. Mount the fresh air hood on top
of the fresh air duct by means of
the supplied supporting fixtures
and stainless screws.
The hood has mounting holes.
Drill holes in the ducts when
mounting.
Figure 6. Mounting brackets for
wall
Mounng angle
Fixture
Figure 7. Wall-mounted unit
Cable
inlets
Hand
regulator
Figure 8. Hoisting air heater
Figure 9. Ceiling mounting
Figure 10. Mounting fresh air hood
Mounng
brackets
1
22
75
12.5

5
3.2 Pipe circuit construction
Review the basic system layout in
figure 11. It shows the principle,
which the implemented system
should follow.
It is recommended to make a plan of
both the pipe and the electrical
circuits.
Construction stages
1. Connect the air heaters and flow
valves to the heating medium as
described in section “3.3
Connection of heating medium”.
2. Connect the regulation and frost
protection. See section “3.4
Regulation and frost protection”.
3. Connect the electrical as
described in section “3.5
Electrical connections”.
4. Test the system.
3.3 Connection of heating medium
The air heaters are designed for hot
water as heating medium.
Heating media sources
• Boilers – type VMA
• Heat pumps – type VMA
• District heating – type VMB
Pipe connections are 5/4” pipe
thread. The water flow direction is
indicated on the pipe connections.
Check the orientation of the flow
valves and set the maximum water
flow rate. The flow rate can be
calculated with the following
formula.
Refer to the documentation included
with the valves for how to set the
flow rate.
The pipe circuit must be
made according to current
regulations and by
authorised personnel.
3.4 Regulation and frost protection
Regulation of the heating capacity is
done by changing the fan speed. See
section “3.5 Electrical connections”.
In addition, the water flow in the
heating coil should be constant to
allow for regulation of the heat
supply through changing of the
water temperature.
Fans with fresh air supply must be
protected against frost. When using
water as heating medium an
automatic control system with a
frost indicator should be installed.
The preferred method is with a stem
bulb sensor in the return water. At
low temperatures this stops the fan,
closes the damper against the
outside air and ensures full flow in
the automatic regulator valve.
Figure 11. Basic system layout –pipe circuit and electric wiring
Supply230 V power supply, 10 A
Return
1x230 V
Speed control
(oponal)
5-step Stepless
Dynamic flow valve
set to max. l/h
* Built-in motor
protecon
Thermo-actuator
230 V, 180 s
Regulator
Oponal external
temp.sensor
Thermostat
Temperature control
Example
Heat need: 50 kW
Heat loss: 20 °C
No. of heaters: 3
Qwater P
loss
10 C
-------------- 42
--------------------------- 3600=
Qwater
50
3
------
20
10
------ 42
------------------ 3600=
Qwater 714 l/h=

Figure 12. Constant flow in coil
t2
SV T2
SV T1
MV
M
t1
Air direcon Return
Supply
M = Motor
MV = Dynamic flow valve
SV = Shut-off valve
t1 = Inlet air temperature
t2 = Outlet air temperature
T1 = Return water temperature
T2 = Supply water temperature

6
3.5 Electrical connections
The electrical connections
must be made according to
current regulations and by
authorised personnel.
Connect the motors to the electrical
supply.
The fans can be connected to
different types of speed regulators.
See the wiring diagrams on pages 10
to 13.
After connecting the motor, check
the direction of rotation from the fan
inlet side.
Directions of rotation
• VM-4 and –5: Counter-
clockwise
• VM-6, -7 and –8: Clockwise
Access to the fan motor on units with
mixing housings is typically done by
removing a side plate opposite the
damper shaft.
The damper motor has a terminal
box for direct cable connection.
4. Maintenance
The air heaters are designed to give
long and reliable operation and to
require little service.
The electric system must be
switched off and locked to
avoid unintentionally starts
when the air heaters are
undergoing maintenance.
The air heaters must be kept clean at
all times for optimum performance
and best level of comfort. Inspect
and clean the units as needed. Units
installed indust-filled environments
require more frequent maintenance.
Refer to figure 1. Basic unit in the
following sections.
4.1 Inspection
Air heaters without accessories on
the inlet side can be checked directly.
Inspection of the inlet on units with
mixing housings is typically done by
removing a vertical side plate of the
mixing housing opposite to the
damper shaft.
4.2 Cleaning
Dust builds up inside the unit
cabinets and reduce the
performance if not removed.
Build-ups on fan suspensions, wire
guards, heating coils and dampers
can usually be removed by vacuum
cleaning. Cleaning the inlet of the
heating coil can be done after
removing the fan unit with
suspension. See section “4.4 Motor”.
On the outlet side it is possible to
remove the front grille.
Wall grilles for fresh air and wire
guards for return air ducts must also
be kept free from dust and foreign
particles.
4.3 Impeller
Prior to delivery, the fan unit has
been carefully balanced. If
vibrations occur during operation, it
is normally due to dust on the fan
blades. If vibrations persist after
cleaning; stop the unit and call for
skilled assistance. Continued
operation may damage the motor
bearings.
4.4 Motor
The motor and impeller is a one
piece assembly. The motor bearings
are greased for life, i.e. approx.
30.000 working hours and cannot be
greased anew. When the service life
of the bearings has run out, they
should be replaced. Replacement of
the bearings should be carried out by
a specialist. During replacement,
remove the entire unit comprising
fan suspension and fan. Afterwards,
remove the suspension from the fan.
When re-mounting, the fan must be
centred carefully with equal blade
clearance around the circumference.
4.5 Heating coil
The heating coil has copper tubes
with aluminium fins and is sensitive
to frost. If there is a risk of hard frost,
it might be necessary – besides the
established frost protection at the
fresh air inlet – to empty the heating
coilofwater.Inexposedinstallations
it is recommended to supply the
plant with antifreeze.
4.6 Damper
The damper function should be
checked on occasion.
4.7 Filters
Filters from Novenco are made of
synthetic material and must be
cleaned occasionally to maintain fan
performance. Cleaning is done
either by vacuum cleaning the dirty
side of the filter mat, rinsing from the
clean side or by washing in
lukewarm soap water at max. 40 °C.
The filter mat can be washed four
times, before it must be replaced.
During cleaning or replacement of
the filter, draw out the filter cassette
and insert a new filter after cleaning
the mat retainers. The filter cassette
is fitted with a handle. The retainers
are of Velcro and reusable.
When ordering a new filter mat,
observe the type and size of fan, e.g.
VMA-62.
The filter condition must be checked
2 weeks after start-up of the fan and
then once every month.
Recommended rise in differential
pressure above the filter mat is
100 Pa.
4.8 Other components
Components for regulation,
ventilation, water outlet and other
accessories essential for the correct
operation of the fan, need regular
inspection and maintenance
according to the manufacturer’s
instructions.

7
5. Electrical connection
The installation and
connection to the supply
network must be done by
authorised personnel and
according to current legislation,
e.g. the EU standard for
electromagnetic compatibility
(EMC).
5.1 Motors
All motors are 1x230 V.
5.2 Regulators
When in operation, the 2.5 A and 5 A
stepless TRIAC regulators generate
audible noise.
5.3 Re-configuration of NV515 – 5-
step
The NV515 – 5-step regulators offer
alternative configuration options for
enabling of minimum speed and
triggering of external devices.
Re-configuration of fan speeds to
knob positions
The minimum fan speed is per
default unassigned. Follow the
procedure below to re-configure the
knob positions.
1. Disconnect power for the
regulator.
2. Remove the front cover.
3. Re-connect the coloured fan
speed control wires. See
appendix “E. NV515 – 5-step
regulators” on page 12.
The fan speed control wires
must only be moved
between the seven regulated
output voltage positions. It is
recommended to keep the colour
order of the wires and to leave the
blue wire at 0 V, which is Off for
knob position 0.
4. Remount the front cover.
5. Connect power to the regulator.
Connection of external device for
knob position 0
The NV515 – 5-step regulator has an
unregulated output on the
connectors N1 and L1. These are
active for knob position 0 and can be
used to trigger an LED, a valve, a
motor etc. See figures 17 and 18
(right) on page 12.
1. Disconnect power for the
regulator.
2. Remove the front cover.
3. Connect external device to the
connectors N1 and L1.
4. Remount the front cover.
5. Reconnect power for regulator.
5.4 Wiring diagrams
The fan motors are connected
through a voltage regulator.
See the appendices for wiring
diagrams of how to connect the
thermostats and how to connect the
thermostats with the regulators.
Several fan motors can be connected
in parallel to the same regulator. See
table 7. “Max. number of motors per
regulator at 50 / 60 Hz”.
6. Troubleshooting
In case of breakdowns, the following
checklists should be completed,
before calling for service.
Lacking performance
•Damper closed
•Ducts clogged
•Supply fan stopped
•Motor defective
•Motor disconnected
•Wrong direction of rotation
Sizes Frequency
[Hz] RPMs Power [W]
Current
[A]
4- 50 /
60
1350 /
1490
110 /
148
0.52 /
0.66
5- 50 / - 1300 / - 190 / - 0.66 / -
6-
50 /
60
1320 /
1450
410 /
570
1.90 /
2.50
7- 910 /
980
390 /
580
1.80 /
2.60
8- 920 /
1080
470 /
730
2.30 /
3.20
Sizes Starting
current [A]
Ambient
temp.
ranges [°C]
Weight
[kg]
Encap-
sulation
4- 1.20 / 1.18 -20 to 45 3.5 IP44
5- - - -
6- 4.40 / - -15 to 60 9.2
IP547- - - -
8- 5.50 / - -15 to 45 12.8
Table 5. Motor specifications 1
1.The motors comply with EU’s ErP 2015 directive.
Types Regulation
type
Voltage
[V]
Max.
current
[A]
Encap-
sulation
RDG100T Thermo-
stat
1x230
4 IP30
NV515 6 IP34
5-step
Speed
1.5
IP54
3.5
5
10
Stepless 2.5
5
Types
Max.
current
[A]
h
[mm]
w
[mm]
d
[mm]
Weight
[kg]
RDG100T 4 128 93 30.8 0.3
NV515 6 - - - -
Table 6. Regulator specifications
5-step
1.5 205 115 100 2.1
3.5 255 170 140 5.0
5 255 170 140 5.4
10 325 300 185 13.2
Stepless 2.5 82 82 65 0.24
5 160 83 81 0.59
Types
Ampere
[A]
RDG100T
[max. 4 A]
NV515
[max. 5 A]
5-step
1.5 A
5-step
3.5 A
4- 0.52 /
0.66 7 / 5 9 / 7 2 / 2 4 / 3
5- 0.66 / - 6 / - 7 / - 2 / - 3 / -
6- 1.90 /
2.50 2 / 1 2 / 2 - / - 1 / 1
7- 1.80 /
2.60 2 / 1 2 / 1 - / - 1 / -
8- 2.30 /
3.20 1 / 1 2 / 1 - / - 1 / -
Types
Ampere
[A]
5-step
5 A
5-step
10 A 1
Stepless
2.5 A
Stepless
5 A
4- 0.52 / 0.66 9 / 7 15 / 13 4 / 3 9 / 7
5- 0.66 / - 7 / - 15 / - 3 / - 7 / -
6- 1.90 / 2.50 2 / 2 4 / 3 1 / 1 2 / 2
7- 1.80 / 2.60 2 / 1 4 / 3 1 / - 2 / 1
8- 2.30 / 3.20 2 / 1 4 / 3 1 / - 2 / 1
Table 7. Max. number of motors per
regulator at 50 / 60 Hz
1.The regulator cannot be used with the RDG100T.
Types
Max.
current
[A]
h
[mm]
w
[mm]
d
[mm]
Weight
[kg]
Table 6. Regulator specifications


8
Noise and vibrations
•Motor bearings defective
•Impeller out of balance
•Impeller worn or damaged
•Bolts or components loose
Fans operating in the stalling area,
may result in breakdowns.
7. Inspection and test
It is recommended to test and
inspect the air heaters and
installation at regular intervals with
regard to operability and operating
conditions.
Extent of inspection
•Measure power consumption
•Check torques for fixing bolts
and correct if necessary
•Cleaning
•Visual inspection of cabinet,
pipe and electric connections
Enter all values and observations in
a log.
8. Sound
9. Safety
The air heaters must be installed
according to Novenco’, the current
and the local safety regulations. At a
minimum these include EN 13850.
It is recommended to review and
revise safety procedures regularly.
Safety check
•Test if safety procedures and the
installation work correctly.
•Check if safety regulations have
been changed and if the
installation needs revising.
•Consider taking additional
measures to improve the safety
of the installation.
10. Disposal
Dispose of air heaters suitable for
scrapping in environmentally safe
ways and in accordance to current
regulations.
The air heaters and especially the
electric motors contain recyclable
materials. Make sure worn-out
motors and fan parts are
disassembled and recycled for the
benefit of the environment
11. Patents and trademarks
Novenco®, ZerAx®, ,
and are registered trademarks
of Novenco Marine & Offshore A/S.
ZerAx®is a registered trademark of
Novenco Building & Industry A/S.
AirBox™, NoVa™ and NovAx™ are
trademarks of Novenco Building &
Industry A/S.
Other trademarks that appear in this
document are the property of their
respective owners.
Copyright (c) 2003 - 2023,
Novenco Building & Industry A/S.
All rights are reserved.
12. Quality management
Novenco is ISO 9001 certified. This
means that all air heaters are
inspected and tested, before leaving
the production.
13. Warranty
Novenco provides according to law
a standard 12 months warranty from
the product is sent from the factory.
The warranty covers materials and
manufacturing defects. Wear parts
are not covered.
Extended warranty can be agreed
upon.
14. Spare parts
Contact Novenco for information
about and ordering of spare parts.
15. Product lifetime
The air heaters have a product
lifetime of 20 years. Storage,
installation and maintenance must
be in accordance with Novenco’s
instructions, which include this
installation and maintenance guide.
Sizes RPMs Sound power
Level total [dB]
Sound pressure
level [dB(A)] 1
1.Sound pressure level at a distance of 5 m, room of
1.500 m3, normal reflection, direction factor Q = 2
4- 1350 59 45
5- 1300 – –
6- 1400 74 60
7- 910 71 57
8- 950 76 62
Table 8. Sound data, VMA and
VMB without accessories

Novenco Building & Industry A/S
Industrivej 22 Tel. [phone]
4700 Naestved www.novenco-building.com
Denmark
9
16. Declaration of conformity
The Machinery Directive 2006/42/
EU, part 2, A.
Novenco Building & Industry A/S
Industrivej 22
4700 Naestved
Denmark
hereby declares that the air heaters
type VMA and VMB have been
manufactured in accordance to and
comply with the European Council's
directives 2006/42/EU regarding
mutual approximation of the
machinery laws (the Machinery
Directive) of the member states.
EU directives
•ECO design 2009/125/EU and
energy labelling regulation 2017/
1369/EU
•EMC 2014/30/EU
•LVD 2014/35/EU
•Machinery 2006/42/EU
UK regulations
•Ecodesign for ErP 2010 and
•Energy Information 2011
•Electrical Equipment (Safety) 2016
•EMC 2016
•Supply of Machinery (Safety) 2008
Applied standards and regulations
EU 327/2011:
Fans driven by motors with electric
power between 125 W and 500 kW
EN ISO 12100:2010
Safety of machinery
- General principles for design
- Risk assessment and risk reduction
EN ISO 13857:2019
Safety of machinery - Safety distances
EN 60204-1:2018
Safety of machinery - Electrical equip-
ment of machines Part 1: General Re-
quirements
EN 61000-6-2:2019
EMC - Part 6-2: Generic standards -
Immunity for industrial environ-
ments
EN 61000-6-3:2007 + A1:2011
EMC - Part 6-3: Generic standards -
Emission standard for residential,
commercial and light-industrial envi-
ronments
EN 61800-3:2018, class C2
Adjustable speed electrical power
drive systems, EMC requirements
and specific test methods
It is conditioned for the validity of
the warranty that Novenco’
instructions for installation and
maintenance have been followed.
UK representative
Novenco Building & Industry UK Ltd
2A Halifax Road
Bowerhill
Wiltshire
SN12 6YY
United Kingdom
Phone: [phone]
E-mail:
[email protected]
Naestved, 03.04.2023
Peter Holt
Technical director
Novenco Building & Industry A/S

10
Appendices – wiring diagrams
A. Thermostats RDG100T and NV515
B. RDG100T – 5-step regulators
Figure 13. Wiring diagrams for RDG100T and NV515 thermostats
Figure 14. Wiring diagram for RDG100T and 5-step regulators 1.5 A, 3.5 A, 5 A and 10 A
Phase
supply
NQ1
PE
Y2Y1
M
LMX1
L1
N
PE
Max. 10 A fuse L1
N
PE
Max. 10 A fuse
GND
supply
RDG100T
Temperature regulator
Phase
supply
GND
supply
Protective
earth
1 L4 NC
6 NO
5 C 2 N
3 PE
NV515
Thermostat
Flow valve
Fan
PE
M
Flow valveFan
Phase
supply
NQ1
* 3-phased
motors only
NLPE U N TK Tk
PE
Y2Y1
M
LMX1
L1
N
PE
Max. 10 A fuse
GND
supply
Motor
protection
Regulator
motorIn 230 VAC
RDG100T
Temperature regulator
926595-0
5-step speed control
1.5 A - 3.5 A - 5 A - 10 A
92660x-0
Thermal actuator
Flow valve
926522-0 Air heater
1x230 VAC

11
C. RDG100T – stepless regulator 2.5 A
D. RDG100T – stepless regulator 5 A
Figure 15. Wiring diagram for RDG100T and stepless regulator 2.5 A
Figure 16. Wiring diagram for RDG100T and stepless regulator 5 A
Phase
supply
NQ1 Y2Y1
M
LMX1
L1
N
PE
Max. 10 A fuse
GND
supply
RDG100T
Temperature regulator
926595-0
Thermo-actuator
Flow valve
926522-0
21NN
PE
Regulation
motorIn 230 VAC
Stepless speed control
2.5 A
Air heater
1x230 VAC
Phase
supply
NQ1 Y2Y1
M
LMX1
L1
N
PE
Max. 10 A fuse
GND
supply
RDG100T
Temperature regulator
926595-0
Thermal actuator
Flow valve
926522-0
NL L1 N PE PE
PE
Regulation
motorIn 230 VAC
Stepless speed control
5 A
Air heater
1x230 VAC

12
E. NV515 – 5-step regulators
Figure 17. Wiring diagram for NV515 and 5-step regulators 1.5 A, 3.5 A, 5 A and 10 A
Default Re-connect example
Knob
positions
Coloured
wires
Knob
positions
Coloured
wires
Regulated output
voltages [VAC]
Fan speeds associated
with output voltages
0 Blue 0 Blue 0 Off
--- --- 1 Grey 80 Minimum
1 Grey 2 Purple 110 Slow
2 Purple 3 Orange 140 Medium
3 Orange 4 Brown 170 Moderate
4 Brown --- --- 190 Fast
5 Red 5 Red 230 Maximum
Table 9. Default and re-connect settings for NV515 – 5-step regulators
Figure 18. NV515 – 5-step regulator, minimum fan speed enabled (left) and location of N1 and L1 connectors (right)
Max. 10 A fuse
Phase
supply
GND
supply
Protecve
earth
NV515
Thermostat
918097-0
Thermal actuator
Flow valve
926522-0
Air heater
1x230 VAC
* 3-phased
motors only
Motor protecon Regulaon motor In 230 VAC
5-step speed control
1.5 A - 3.5 A - 5 A - 10 A
92660x-0
Unregulated output
NN1LL1PE U N TK TK
PE
M
4 NC
6 NO
5 C
1 L 2 N 3 PE
L1
N
PE

13
F. NV515 – stepless regulator 2.5 A
G. NV515 – stepless regulator 5 A
Figure 19. Wiring diagram for NV515 and stepless regulator 2.5 A
Figure 20. Wiring diagram for NV515 and stepless regulator 5 A
L1
N
PE
Max. 10 A fuse
Phase
supply
GND
supply
Protective
earth
1 L4 NC
6 NO
5 C 2 N
3 PE
NV515
Thermostat
918097-0
M
Thermal actuator
Flow valve
926522-0
21NN
PE
Regulation
motorIn 230 VAC
Stepless speed control
2.5 A
Air heater
1x230 VAC
L1
N
PE
Max. 10 A fuse
Phase
supply
GND
supply
Protective
earth
1 L4 NC
6 NO
5 C 2 N
3 PE
NV515
Thermostat
918097-0
M
Thermal actuator
Flow valve
926522-0
NL L1 N PE PE
PE
Regulation
motorIn 230 VAC
Stepless speed control
5 A
Air heater
1x230 VAC

Pure competence in air.
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