Schwank deltaSchwank Series, 310U, 950U, 1260U, 320U Technical Manual

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deltaSchwank

Radiant Tube Heater
with pneumatic gas-/air ratio control

310U / 320U / 625U / 635U / 950U / 1260U

modulating operation

single heater and flue gas collection system [herringbone] type F

Version 003 deltaSchwank 16/19 INT

Technical s

ecification sub

Technical

Technical Instructions

Operating Instructions

Legal Requirements

Manual

Assembly Instructions

0085CS0487

Installation Instructions

Commissioning

Service Guide

ect to chan

e

SCHWANK GmbH

Bremerhavener Str. 43 • 50735 Cologne • Germany
Postfach 62 02 49 • 50695 Cologne • Germany

Tel.: + 49 [0] 221 / 7176 0
Fax: + 49 [0] 221 / 7176 288
Internet: www.schwank.de

Schwank companies in: Austria ▪ Belgium ▪ Canada ▪ China ▪ Czech Republic ▪ France ▪ Germany ▪ Great
Britain ▪ Hungary ▪ Netherlands ▪ Poland ▪ Romania ▪ Russia ▪ Slovakia ▪ Ukraine ▪ USA ▪ Distribution in more
than 40 countries worldwide

deltaSchwank

1 Introduction .......................................................................................................................................................... 4

2 Your safety ............................................................................................................................................................ 4

Notes for your safety ................................................................................................................................ 4

General Notes .......................................................................................................................................... 4

3  Scope of Delivery ................................................................................................................................................ 5

4  Planning ................................................................................................................................................................ 7

Position of suspension .............................................................................................................................. 7

Positioning ................................................................................................................................................. 8

Air supply / Exhaust Requirements ......................................................................................................... 9

5  Legal Requirements .......................................................................................................................................... 18

6  Operation ........................................................................................................................................................... 19

Switching on the heater ........................................................................................................................ 19

Switching off the heater ........................................................................................................................ 19

Fault ......................................................................................................................................................... 19

Maintenance .......................................................................................................................................... 19

7 Technical specification .................................................................................................................................... 20

Technical data ....................................................................................................................................... 22

8 Operating description ...................................................................................................................................... 24

9 Assembly instructions ........................................................................................................................................ 25

10 Installation instructions ...................................................................................................................................... 35

Gas-pipe-system and mounting of heaters ........................................................................................ 35

Exhaust flue installation single heater .................................................................................................. 37

Installation exhaust collecting system [herringbone] ....................................................................... 37

Electrical installation [wiring diagram] ............................................................................................... 38

Electrical connection Operation with MODBUS control ................................................................... 38

Electrical connection exhaust gas collecting system ....................................................................... 38

11 Commissioning instructions .............................................................................................................................. 42

Before commissioning ........................................................................................................................... 42

Parameter IC 4000/1 and setting ......................................................................................................... 43

Assignment MODBUS address .............................................................................................................. 44

External identification MODBUS address ............................................................................................. 44

Adjusting nominal heat load / Modulating range ............................................................................ 45

Commissioning exhaust gas collecting system [herringbone] ......................................................... 47

12 Service guide / Trouble shooting .................................................................................................................... 48

Version 003 deltaSchwank t6/19 Technical specification subject to change

13 Change of gas type ......................................................................................................................................... 50

14 Accessory ........................................................................................................................................................... 51

15 Spare parts ......................................................................................................................................................... 52

16 EC type examination certificate ..................................................................................................................... 54

17 EC declaration of conformity .......................................................................................................................... 56

18 Product information related to Ecodesign Regulation No 2015/1188 ...................................................... 57

Maintenance and annual check [herringbone] ............................................................................... 48

Error codes .............................................................................................................................................. 49

Troubleshooting / Error cause ............................................................................................................... 50

tetraSchwank ......................................................................................................................................... 51

Spare parts radiant kit deltaSchwank ................................................................................................. 52

Spare part bluTek-burner kit deltaSchwank ...................................................................................... 53



3

deltaSchwank

1 Introduction

Thank you for choosing a high efficiency
SCHWANK radiant tube.

Your deltaSchwank is a modern and low-pollution
tube heater for economic and comfortable
heating of industrial and commercial buildings.

The design and operation of the heater are
according to the requirements of the existing
standards.

Please read this manual carefully before using the
heater. Please follow carefully all instructions and
warnings. The manufacturer will not be held
responsible for damages resulting from installation
errors or failure to comply with the manufacturer’s
instructions.

Follow carefully all warnings in chapter 2 “Your
Safety”.

These tube heaters are constructed exclusively for
the application of large industrial and commercial
space heating. Any other use is not permitted and
therefore Schwank is not liable for any improper
use.

2 Your safety

You will find the following symbols in this manual:#

Danger!

Note that you and others can be hurt.

Attention!
Note that the appliance can be

damaged.

Danger!
Note that electrical shocks can be very
dangerous. Pay attention while working
on the electrical equipment.

Advice!



You find additional instructions about the
application/handling of the heater.

Notes for your safety

This appliance is designed according to the
requirements of the existing standards.
Nevertheless it is possible that dangers for you and
others result from the installation and/or operating
errors.

To avoid this, please read and follow the
instructions carefully.

General Notes

Only use the radiant tube if it is in a technically
faultless condition.

Make sure that all persons who operate, assemble,
install, commission, maintain or repair this device
have read this technical manual and keep the
technical instructions in the field.
Observe the generally valid legal and other
binding rules for accident prevention.
Do not make any modifications, attachments or
conversions to the device without the express
permission of Schwank GmbH. Interventions or
repairs to this equipment should only be made by
authorized installers using spare parts specially
approved for use with this equipment. Otherwise,
the valid EC-Type Examination Certificate and the
operating permit for this device will cease to exist
and the manufacturer's liability for the product and
its functional safety will be void.

Safety for the electrical equipment

Danger of electrical shocks!
Electrical shocks can be very dangerous!
The electrical installation must be carried out by a
qualified service engineer following the existing
national and international standards.

Check the electrical equipment regularly.
Defect wires etc. must be replaced immediately.

The appliance must be cut off from the power
supply while working with the electrical equipment.
Make sure that nobody can connect the
appliance to the power supply while you are
installing or maintaining the unit.

After-sales Service

For all installation operations, start-up, gas
changes, etc. always consult a qualified service
engineer.

In case of doubt, contact SCHWANK GmbH,
phone + 49 [0] 221 / 7176 0.

Version 003 deltaSchwank 16/19 Technical specification subject to change

4

deltaSchwank

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3 Scope of Delivery

Fig 1: Radiant tube heater deltaSchwank

Radiant tube

full-isolated reflector

Combustion

bluTek­burner kit

Suspension bracket

Scope of Delivery

The radiant tube deltaSchwank consists of
following main kits:

 bluTek-burner kit:

with heat-input related bluTek-burner,
gas-/air ratio control unit,
automatic gas burner control IC 4000/1,
wiring, operating indicator

 Radiant kit:

combustion chamber with double tube design,

Version 003 deltaSchwank 16/19 Technical specification subject to

radiant tubes with U-bend element, flange
gaskets, corrosion resistant, radiant-optimized
and full-isolated reflector with end cap and
suspension brackets

Accessories

 Central control unit SchwankControl Touch with

temperatures and operating schedules,
MODBUS control

 Gas hose connection unit with integrated gas

cock and TSD

 Gas filter
 Supply air- / exhaust -system
 Exhaust gas heat exchanger for the utilisation

of condensing technology - tetraSchwank

 Fastening-suspension set [system Gripple]

5

deltaSchwank

Structure of bluTek-burner kit

14 15

Fig 2: bluTek-burner kit

13

1

1. Automatic burner controller IC 4000/1

2. Gas-/air ratio control unit

3. Test nipple connection pressure

4. Throttle screw gas volume

5. Adjustment screw OFFSET

6. Test nipple OFFSET

7. Measuring pipe negative pressure
air intake side

8. bluTek burner

9. Ignition and ionisation electrode

10. Ignition cable

11. Air intake connection element

12. Adapter air intake / venturi

13. Corrugated gas pipe

14. Gas connection [bulk head fitting]

15. 4-pin power supply socket

16. Adapter fan / bluTek-burner

17. Perforated cover adapter

18. Top lid [access to gas valve]

18

2

Fig 3: View from above gas combination valve

16

34

gas-/air ration control unit

5

Version 003 deltaSchwank 16/19 Technical specification subject to change

8 9101112

17

6 7

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deltaSchwank

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4 Planning

Room temperature control

Radiant tube systems for the full heating of large
rooms must be equipped with a temperature
control.

Section heating is allowed without temperature
control.

Position of suspension

Suspension height

Radiant tubes must be positioned so that no one in
the radiation area is exposed to an extreme high
heat level. This is ensured when the minimum
suspension heights shown in the following table are
adhered to:

Nominal
thermal load in
kW

Suspension height in m

[max. radiation 200 W/m2 ]

according to G 638-2

[t

=15°C, full heating]*

Ambient

A = horizontal suspension

Distances to flammable materials in the
radiant area

Radiant tubes must be positioned so that the
surface temperature of:

 components with flammable materials,
 flammable equipment
 stored flammable materials

never rises above 85° C.

10 3,5 m
20 4,5 m
25 4,9 m
35 5,5 m
47 7,7 m
58 9,0 m

Tab 1: Minimum suspension heights [see Fig 4]

Key:

A = Minimum height when hanging horizontally
* Please contact Schwank for determination of suspension

heights on other ambient temperatures

Type a [cm] b [cm] d [cm]

Version 003 deltaSchwank 16/19 Technical specification subject to

deltaSchwank 310U 130 40 20

deltaSchwank 320U 130 40 20

deltaSchwank 625U 145 40 20

deltaSchwank 635U 180 40 20

deltaSchwank 950U 280 40 20

Fig 4: Suspension heights and distances for horizontal

application

Direction of radiation

Radiant tubes deltaSchwank can be positioned
only horizontal. For this purpose suspension steel
chains and cables are installed at the suspension
brackets.

deltaSchwank 1260U 350 40 20

Tab 2: Safe distances [see Fig 4]

Key:

a = Minimum radial safety distance [inside radiation area]
b = Minimum upper safety distance when hanging horizontally
d = Minimum lateral distance to supply pipes outside radiation

area

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deltaSchwank

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Positioning

The radiant tube can be mounted with

 chain links [welded] min. 4 mm strong
 adjustable steel cable 3 mm strong

[Schwank accessories]

If you chose chains please use bolts with lock nuts
for fixing the chain to the suspension bracket.

The radiant tube has to be fixed by
vertical chains etc. to the roof or to
supporting devices.

Chains and steel cables have to be
fixed in vertical direction or slightly
diagonally outwards above the fixing
points of the suspension brackets to the
roof or to supporting devices. Fixing of
the suspension cables or chains
diagonally inwards to the centre of the
heater is not permitted [see Fig 5].

Please note that the radiant tube being
in operation expands several
centimetres because of thermal
expansion. Avoid therefore inflexible
suspension.

Do not use fixing elements like open
hooks etc.

When fastening to trapezoidal sheet
roofs, make sure that the maximum
surface load is not exceeded, if
necessary. The load must be distributed
over a larger area by means of a
substructure.

Hang the heater in balance. We recommend the
use of turnbuckles or adjustable steel cable grips
for ease of adjustment and balance.

Fixing points for chains or steel cables on the heater
are shown in Fig 16, 17, 18 and 19 on pages 21 and

22.

x

Correct = vertical or slightly

onally outwards

dia

Wrong = diagonally inwards

Fig 6: Slope of radiant tube heater

Attention!
If you do not align the bluTek-burner kit
correctly the device can be damaged.

SCHWANK GmbH will not accept liability
for damages caused by incorrect
mounting of the burner unit. Correct
mounting is the responsibility of the
installer.

Attention!
Please note that the radiant tubes in
longitudinal direction must have a small
slope [3 mm per meter] to the U-bend
[Fig 6].

310U –625U: x=15 mm

635U: x=20 mm

950U - 1260U: x=30 mm

Version 003 deltaSchwank 16/19 Technical specification subject to change

x

Fig 5: Chains / steel cable mounting

8

deltaSchwank

change

Air supply / Exhaust Requirements

The calculation of air supply / exhaust
requirements of a building heated by radiant tube
heaters is subject of European Directive EN 13410.
Please follow local by-laws as well.

Please see the max. lengths of combustion air
supply- and exhaust flue pipe on page 9 [Tab 3,
point 3].

Place of Installation

The room to be heated must have an air volume of
minimum 10 m³ for each kW of the nominal
thermal load of the installed heater.

Air supply [combustion air from inside the
room, types A3 and B23]

Heating installations with combustion air from
inside the room are only allowed in rooms without
string air pollution. Otherwise use system with
combustion air from outside [type C].

In halls and buildings with a normal air change by
means of joints and gaps it is not necessary to
install additional equipment to ensure combustion
air supply.

Version 003 deltaSchwank 16/19 Technical specification subject to

Air supply / exhaust systems

For the radiant tube deltaSchwank the following
air supply / exhaust systems are possible:

1. Indirect flue into the room

[Type A3 without exhaust system,
combustion air from inside the room]

2. Flued with individual exhaust system,
combustion air from inside the room

[Type B23]

3. Flued with individual exhaust system,

combustion air from outside the room
[Type C]

4. Flued with exhaust collecting system and
central flue fan – combustion air either from
inside or from outside

[according to EN 777, Type F]

1. Indirect flue into the room

[Type A3 without exhaust system combustion
air from inside the room]

The exhaust gas of the tube heater has to be
conducted from the inside of the room to the
outside.

Conduction of the exhaust air may be carried out
with one of the following 3 methods:



a) Thermal ventilation: Combustion air and

exhaust gas are to be conducted through

fixed outlets positioned on the roof or on
the walls of the building.

b) Mechanical ventilation: Combustion air

and exhaust gas are to be conducted
through

one or more fans positioned on the roof or
on the walls of the building.

c) Natural ventilation: Combustion air and

exhaust air are to be conducted through

outlets as a result of differences in pressure
and in temperature between the internal
and external side of a building.

For exact dimensioning and positioning of
supply air and exhaust gas outlet of the
building according to EN 13410 or G638-2
please contact Schwank GmbH,
phone +49 [0] 221 / 7176 0.

9

deltaSchwank

2. Exhaust flue with individual exhaust system -
combustion air from inside the room

[Type B23]

Only use this system in rooms with no air pollution
and without relevant pressure differences to
outside. Otherwise use type C.

3. Exhaust flue with individual exhaust system ­combustion air from outside the room

[Type C]

Combustion air and exhaust air are to be
conducted by a temperature stable, concentric
pipe from a wall or roof entrance.

Max. length of the concentric pipe can be 6 m
plus two 90° elbows.

The concentric pipe ends at a bifurcated pipe.
Please ensure that the connection for exhaust gas
between heater and bifurcated pipe is a flexible
pipe.
This also applies for the incoming air pipe that are
connected to the air inlet adapter bluTek-burner
kit.
Do not use back-pressure valves or dampers in the
exhaust flue.

deltaSchwank

Max. length

between heater

and roof/wall

entrance

6 m 2 100 mm

Tab 3: Air/exhaust routing

max. number

of elbows

(90°)

Ø of

air/exhaust flue

4. Exhaust flue with exhaust gas collection system
and central flue fan

[according to EN 777, Type F]

The heating installation must not exceed 10 radiant
tubes. The exhaust gas of each tube is collected
via a central collecting tube system by a central
flue fan and led to the chimney. Planning,
construction and layout of such installations must
be carried out by Schwank employees, as well as
commissioning. The strict observance of the
Schwank layout-drawings and calculation figures
are the precondition of the manufacturer’s
warranty.

Please note that it be necessary to install in the
collecting tube behind each radiant heater a
throttle or a pressure-balancing device. This
ensures a precise regulation and an even exhaust
flue of each radiant tube.

see technical instruction



deltaSchwank with exhaust gas
collection system

Version 003 deltaSchwank 16/19 Technical specification subject to change

Fig 7: Air/exhaust--system, version aluminium or stainless steel

10





Flexible exhaust system deltaSchwank [wall terminal]

- version aluminium -

deltaSchwank

Connection stainless steel flexible pipe
to aluminium tube must be glued with
heat-resistant sealing material and
locked by means of self-tapping
screws.

All socket connections on the exhaust
and incoming air routes must be
locked by means of self-tapping
screws.

The 90° elbow at the sucking fan side is
to mount with the opening on the top.

The wall terminal is mounted with a
small gradient to outside to prevent
intrusion of driving rain.

A vertical distance between exhaust
gas outlet and wall terminal outlet of
at least 50cm is mandatory.

For exhaust gas lengths> 1.5 m
[without wall terminal] condensate
drainage must be installed.

This is valid on principle for types
deltaSchwank 310U and 320U.





The following components are required for
mounting the wall terminal aluminum design
[Distance heater- terminal approx. 1.5 m]:

Wall terminal M&G:Article no. 12221797

Testing set C 15-20kW: Article no. 12676660
Testing set C 30-40kW: Article no. 12676750

Control points

Please note the safety distance to
flammable materials:

- single-wall exhaust pipe: 40 mm

- double-wall exhaust pipe + wall

terminal: 0 mm

System certification tube heater
deltaSchwank with exhaust line
system MUGRO
CE 0432-CPD-217915,System 0.2 / 0.5
[Muelink&Grol]

The wall terminal is fastened to the
building wall with screws by means
of the integrated flange plate. The
flange plate supports and secures
the wall terminal.

Version 001 deltaSchwank 4117 Technische Änderungen vorbehalten

Fig 8: Position of control points [wall terminal], version aluminium

Connection stainless flexible
pipe to aluminium

exhaust flue:
stainless flexible pipe with
connecting flange

tube

combustion air:
dS 310 - 320U: aluminium pipe
dS 625 - 1260U: stainless flexible pipe

11

deltaSchwank









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Flexible exhaust system deltaSchwank
[roof terminal]

- version aluminium -

Install stainless steel flexible pipe
without sink.

Connection stainless steel flexible pipe
to aluminium tube must be glued with
heat-resistant sealing material and
locked by means of self-tapping screws.

All socket connections on the exhaust
and incoming air routes must be locked
by means of self-tapping screws.

The 90° elbow at the sucking fan side is to
mount with the opening on the top.

A vertical distance between exhaust
gas outlet and roof terminal outlet of at
least 50cm is mandatory.

For exhaust gas lengths> 1.5 m [without
roof terminal] condensate drainage
must be installed.

This is valid on principle for types
deltaSchwank 310U and 320U.

Please note the safety distance to
flammable materials:

- single-wall exhaust pipe: 40 mm

- double-wall exhaust pipe + wall

terminal: 0 mm

System certification tube heater
deltaSchwank with exhaust line
system MUGRO
CE 0432-CPD-217915, System 0.2 / 0.5
[Muelink&Grol]

The roof terminal is slide in from above
into the roof socket. in from above into
the roof socket. The fixing inside the
building takes place via a clamp to the
building ceiling.

Version 001 deltaSchwank 4117 Technische Änderungen vorbehalten

The following components are required for
mounting the roof terminal aluminum design
[Distance heater- terminal approx. 1.5 m]:

Roof terminal M&G:Article no. 12221770
Testing set C 15-20kW: Article no. 12676660
Testing set C 30-40kW: Article no. 12676750

Dimension flat roof sockets

Fig 9: Position of control points [roof terminal], version aluminium

flat version

Control points

Connection stainless flexible
pipe to aluminium

high version

exhaust gas:
stainless flexible pipe with
connectin

combustion air:
dS 310 – 320U: aluminium pipe
dS 625 – 1260U: stainless
flexible pipe

tube

flange

12

deltaSchwank

Condensate drain deltaSchwank

- version aluminium -

For flue gas lengths > 1.5 m [exclusive
chimney] a condensate line must be
laid. In general this applies for types
deltaSchwank 310U and 320U.

For this use a special cap with outlet
spout for T-piece [ outdoor
32 mm] is available in order to
connect a following condensate
drainage.

A flexible stainless steel pipe as
connection is recommended because
higher temperatures in nominal load
operation [200 ° C] can occur at the
connection point.

Drain lines must be laid with a gradient
to discharged inlet point into sewer.

Version 002 deltaSchwank 19/18 Technical specification subject to change

Fig. 10: Condensate drain deltaSchwank

13

deltaSchwank





Flexible exhaust system deltaSchwank [wall terminal]

- version stainless steel -

Install stainless steel flexible pipe
without sink.

Join parts of the roof terminal strongly
together by compression and using
of jointing and sealing paste
[e.g. Ceramax]!

All joints inside the building tighten
securely with clamp fittings!

The 90° elbow at the sucking fan side is
to mount with the opening on the top.

The wall terminal is mounted with a
small gradient to outside to prevent
intrusion of driving rain.

A vertical distance between exhaust
gas outlet and wall terminal outlet of
at least 50cm is mandatory.

For exhaust gas lengths> 1.5 m
[without wall terminal] condensate
drainage must be installed.

This is valid on principle for types
deltaSchwank 310U and 320U.

Please note the safety distance to
flammable materials:

-single-wall exhaust pipe: 80 mm

- double-wall exhaust pipe

+ wall terminal: 0 mm

System certification tube heater





The following components are required for
mounting the wall terminal stainless steel design
[Distance heater- terminal approx. 1.5 m]:

Stainless steel exhaust system wall terminal
DN 100/160

deltaSchwank with exhaust line system
Future ew CE 0432-CPR-00055-209 /
Future ew-flex CE 0036-CPR-00055-207 /
Future dw CE 0432- CPR-00055-301
[Schräder]

The wall terminal is fastened to the
building wall with screws by means of
the integrated flange plate. The flange
plate supports and secures the wall
terminal.

: Article no. 12202220

Version 002 deltaSchwank 19/18 Technical specification subject to change

Control points

Fig 11: Position of control points [wall terminal], version stainless steel

14





Flexible exhaust system deltaSchwank [roof terminal]

- version stainless steel -

deltaSchwank

Install stainless steel flexible pipe
without sink.

Join parts of the roof terminal strongly
together by compression and using
of jointing and sealing paste
[e.g. Ceramax]!

All joints inside the building tighten
securely with clamp fittings!

The 90° elbow at the sucking fan side is to
mount with the opening on the top.

A vertical distance between exhaust
gas outlet and wall terminal outlet of at
least 50cm is mandatory.

For exhaust gas lengths > 1.5 m [without
roof terminal] condensate drainage
must be installed.

This is valid on principle for types
deltaSchwank 310U and 320U.

Please note the safety distance to
flammable materials:

-single-wall exhaust pipe: 80 mm

- double-wall exhaust pipe

+ roof terminal: 0 mm

The following components are required for
mounting the roof terminal stainless steel
design[Distance heater- terminal approx. 1.5 m]:

Stainless steel exhaust system roof terminal
DN 100/160 Article no. 12202080





System certification tube heater
deltaSchwank with exhaust line system
Future ew CE 0432-CPR-00055-209 /
Future ew-flex CE 0036-CPR-00055-207 /
Future dw CE 0432- CPR-00055-301
[Schräder]

The roof terminal is fastened with screws
by means of the integrated flange plate
on the building ceiling. The flange plate
supports and secures the roof terminal.

Version 002 deltaSchwank 19/18 Technical specification subject to change

Fig 12: Position of control points [roof terminal], version stainless steel

Control points

15

deltaSchwank







Exhaust system deltaSchwank [roof terminal]
with downstream heat exchanger tetraSchwank in room air operation and with outside

air intake in fresh air operation

- version stainless steel -

Install stainless steel flexible pipe
without sink.

Join parts of the roof terminal strongly
together by compression and using
of jointing and sealing paste
[e.g. Ceramax]!

All joints inside the building tighten
securely with clamp fittings!

tetraSchwank heat exchanger should be
mounted with slight slope [3 mm/1m] to
the T-piece.

Fig 13: Installation tetraSchwank in room air operation, with roof

terminal stainless steel

Fig 14: Installation tetraSchwank with outside air intake in fresh air operation, with roof terminal stainless steel







Installations exhaust system with heat recovery:

1. flue gas heat exchanger tetraSchwank

- pre-assembled
L= 4700 mm Article no. 62000020

2. ventilator tetraSchwank with protection grating

3. T-piece stainless steel with condensation outlet

connection R ½“

4. fastening clamp for suspension, premounted

5. single-wall roof terminal with in room air

operation Article no. 12201941
double wall roof terminal with outside air intake

in fresh air operation Article no. 62000090

Please note the safety distance to
flammable materials:

-single-wall exhaust pipe: 80 mm

- double-wall exhaust pipe

+ roof terminal: 0 mm

System certification tube heater
deltaSchwank with exhaust line system
Future ew CE 0432-CPR-00055-209

The roof terminal is fastened with
screws by means of the integrated
flange plate on the building ceiling.
The flange plate supports and secures
the roof terminal.

Version 002 deltaSchwank 19/18 Technical specification subject to change

16

deltaSchwank

Exhaust pipe collecting system [herringbone] with central fan
System F approved according to EN 777 and DIN EN 416

Exhaust pipe collecting system consist of
following main components:

 Tube heater deltaSchwank
 Spiral duct and connection elements for

exhaust collecting system [different
dimensions]

 Central low-pressure fan
 Fan monitoring

Article no. 700 0012 0

Central fan

Collecting exhaust pipe

Connecting pipe

Version 021 infra D Form_U 16/19 Technische Änderungen vorbehalten

Fig. 15: Installation exhaust collecting system with central fan , system F [principle scheme]

Damper behind heater

Planning and calculation of the
complete system including collecting
pipes, fans and chimneys
must only be done by Schwank.
Planning details have to be strictly
adhered to during mounting and
assembly. Commissioning of the system
should be carried out by Schwank.

Exhaust gas terminal

Control point chimney
sweeper

Damper in front of
central fan

Tube heater

17

deltaSchwank

5 Legal Requirements

We recommend that these installation guidelines
should be observed with the relevant Building
Standards Regulations of your country. Comply
with any local by-laws and the current IEE Wiring
Regulations.

Notwithstanding their limited scope, the
appliance should be installed by a competent
person in accordance with the relevant
provisions of the Gas Safety [Installation and Use]
Regulations. Caution must also be taken of any
obligations arising from the Health and Safety of
Work Act. Full compliance with all relevant
regulations, including amendments in force at
the time of installation is a requirement of our
warranty.

In Germany the following rules, standards and
regulations must be observed.

EnEV Verordnung über

energiesparenden Wärmeschutz
und energiesparende
Anlagentechnik bei Gebäuden

DIN EN 12831 Heizungsanlagen in Gebäuden
Verfahren zur Berechnung der
Norm-Heizlast

DIN EN 13384 Abgasanlagen

DIN V 18599 Energetische Bewertung von
Gebäuden – Berechnung des
Nutz­ End- und Primärenergiebedarfs
für Heizung, Kühlung, Trinkwasser
und Beleuchtung

DVGW G 660 Technische Regeln für die
mechanische Abführung der
Abgase von Feuerstätten

Version 003 deltaSchwank 16/19 Technische Änderungen vorbehalten

VDE 0722 Elektrische Vorschriften

VDE 0100 Bestimmungen für das Errichten
von Starkstromanlagen

Beachten Sie außerdem die Bestimmungen der
jeweiligen

LBO Landesbauordnung

FeuVO Feuerungsverordnung der
Länder

TAB Technische Anschluss­ bedingungen der örtlichen
Energieversorgungs­ unternehmen

18

deltaSchwank

6 Operation

The installation must be carried out by
a qualified engineer following the
manufacturer’s instructions.

SCHWANK will not accept liability damages
caused by improper assembly and/ or operating
of the heater. Proper assembly and operation is
the responsibility of the user.

Switching on the heater

 First switch on the central control unit

SchwankControl Touch and activate a
heating command.
After a pre-purge period of about 25 sec.
the ignition starts.

Switching off the heater

Maintenance

Servicing of the heater is essential for continued
efficient operation. Servicing should be carried
out not less than once a year by a qualified
service engineer. After any servicing, the heater
must be recommissioned as detailed in
Chapter 12.

Version 003 deltaSchwank 16/19 Technical specification subject to change

 Disable the heating command on central

control unit SchwankControl Touch.

If the radiant tube is controlled by a thermostat
the heater will be switched on and off
automatically.

Fault

If no flame is reported during the pre-purge
period and the safety time [approx. 30 sec.] the
heater repeats the ignition process. If there is no
flame after the second ignition process the
heater switches off automatically and is locked.

Investigation and repair must be carried



out by authorized personnel. After
clearance of the fault the heater can be
reset.

 The cause of the fault / error code is

displayed on the central control unit
SchwankControl Touch or can read out via
corresponding service software IC 4000.
See chapter 12 for error codes.

Lock release [Reset]

 Activate the reset command via the

central control unit or interrupt the electric
power supply for 3 seconds.

19

deltaSchwank

7 Technical

specification

Appliance Automatic heating device, heat

transfer by means of infrared dark
radiation.

Fuel Types Natural gas
Propane

Minimum connection pressure in front of valve

Attention!

Max. connection pressure: 65 hPa

Gas connection 15-35 kW R=1/2’’ male

50-60 kW R=3/4“ male
[Connection fitting ¾”enclosed in burner kit
cardboard]

deltaSchwank 310U / 320U

Fig 16: Dimension deltaSchwank 310U / 320U

Fig 17: Dimension deltaSchwank 625U / 635U

Gas type 310 – 1260U
Natural Gas H 15 hPa
Natural Gas L 20 hPa
Propane 40 hPa

[view from below]

[view from below]

Electrical connection power supply

Single-phase AC 230 V, N, PE - 50Hz
The connecting cable for the power supply is

connected to the IC 4000/1 burner control with
the provided 4-pin plug.

The power supply for the heater must be flexible
with maximal wire cross-section

- 3x 1.5 mm

2

Ölflex- or silicone cable

To set the bluTek-burner kit free of voltage it is
only necessary to remove the plug of the power
supply.

Regulation

The heating system is controlled via the central
control unit SchwankControl Touch.
The corresponding heating commands for the
heater are sent via MODBUS.

Connection MODBUS control from
SchwankControl Touch to IC 4000/1

Use for MODBUS transmission max. 3x 0.5 mm

2

cable.
Route the cable through the lower cable gland
into the housing of burner control unit IC 4000/1
and connected to the corresponding spring
terminals on the circuit board.

Exhaust gas connection

Flange at radiant tube end for exhaust
connection Ø 100 [flexible stainless steel pipe /
exhaust gas adapter]

deltaSchwank 625U / 635U

Version 003 deltaSchwank 16/19 Technical specification subject to change

20

deltaSchwank

deltaSchwank 950U

Fig 18: Dimension deltaSchwank 950U

deltaSchwank 1260U

Fig 19: Dimension deltaSchwank 1260U

Version 001 deltaSchwank 4117 Technische Änderungen vorbehalten

[view from below]

[view from below]

DETAIL A
Cross dimension

DETAIL B
Tube overhang x on
last suspension bracket

deltaSchwank 310U / 320U – 50 mm
deltaSchwank 625U / 635U – 30 mm
deltaSchwank 950U – 162 mm
deltaSchwank 1260U - 140 mm

21

deltaSchwank

Technical data

Gasart

Nat. Gas H

G 20

1)

Nat. Gas L

G 25

2)

Propane

G 31

3)

Nominal heat input [kW]

modulating max./min. [kW]

Gas consumption [m3/h]

Nominal heat input [kW]

modulating max./min. [kW]

Gas consumption [m3/h]

Nominal heat input [kW]

modulating max./min. [kW]

Gas consumption [m3/h]

Weight [kg]

 air-/ exhaust connection [mm]

Electrical consumption [W]

Protection class

Gas connection [male thread]

Electrical supply

Ignition / Control

CE-Identifikation

deltaSchwank

310 320 625 635 950 1260

10,0 20,0 25,0 35,0 48,0 58,0

10,0 -7,5 20,0 - 10,0 25,0 - 12,5 35,0 - 17,5 48,0 - 25,0 58,0 -29,0

1,00 2,00 2,51 3,51 4,81 5,82

10,0 20,0 25,0 35,0 48,0 58,0

10,0 -7,5 20,0 - 10,0 25,0 - 12,5 35,0 - 17,5 48,0 - 25,0 58,0 -29,0

1,17 2,33 2,92 4,08 5,60 6,77

10,0 20,0 25,0 35,0 48,0 58,0

10,0 -7,5 20,0 - 10,0 25,0 - 12,5 35,0 - 17,5 48,0 - 25,0 58,0 -29,0

0,78 1,55 1,94 2,72 3,73 4,51

114 114 181 186 254 326

Ø 100

30 45 55 75 175 300

IP 20

R½“

230 V/ 50 Hz ~

Spark ignition and ionisation control by automatic burner control IC 4000/1

CE 0085CS0487

3

/4“

R

Version 001 deltaSchwank 4117 Technische Änderungen vorbehalten

Tab. 4: Technical data deltaSchwank

1] H

= 9,97 kWh/m3 / 2] H

i,n

= 8,57 kWh/m3 / 3] H

i,n

= 12,87 kWh//kg

i,n

22

deltaSchwank

Gas Characteristic values

Nat. gas
H

G 20

Nat. gas
L

G 25

Propan
e

Version 002 deltaSchwank 19/18 Technische Änderungen vorbehalten

G 31

Tab 5: Characteristic values bluTek-burner kit deltaSchwank 1] H

Start fan speed
PP04 [value / RPM]

Minimum fan speed
PP05 [value / RPM]
Maximum fan speed
PP06 [value / RPM]
Installation C

/ C33 or B23

13

Gas-/air ratio control unit NRV 118 NRV 118 NRV 118 NRV 118 NRV 128 NRV 148

Premix bluTek-burner
length [mm]

Volume flow fan
nominal load [m3/h,n]

OFFSET, effective [Pa]

CO2-value[%] @ max
Installation C

13

/ C33
CO2-value[%] @ min
Installation C

13

/ C33
Exhaust temp. NL / PL [°C] 125 / 85 215 / 125 200 / 135 240 / 165 215 / 145 210 / 150

Start fan speed
PP04 [value / RPM]

Minimumfan speed
PP05 [value / RPM]
Maximum fan speed
PP06 [value / RPM]
Installation C

/ C33 or B23

13

Gas-/air ratio control unit NRV 118 NRV 118 NRV 118 NRV 118 NRV 128 NRV 148
Premix bluTek-burner

length [mm]
Volume flow fan

nominal load [m3/h,n]

OFFSET, effective [Pa]

CO2-value[%] @ max
Installation C

13

/ C33
CO2-value[%] @ min

Installation C

13

/ C33

Exhaust temp. NL / PL [°C] 125 / 85 215 / 125 200 / 135 240 / 165 215 / 145 210 / 150

Startfan speed
PP04 [value / RPM]

Minimum fan speed
PP05 [value / RPM]
Maximum fan speed
PP06 [value / RPM]
Installation C

/ C33 or B23

13

Gas-/air ratio control unit NRV 118 NRV 118 NRV 118 NRV 118 NRV 128 NRV 148
Premix bluTek-burner

length [mm]
Volume flow fan

nominal load [m3/h,n]

OFFSET, effective [Pa]

CO2-value[%] @ max
Installation C

13

/ C33
CO2-value[%] @ min
Installation C

13

/ C33

Exhaust temp. NL/PL [°C] 125 / 85 215 / 125 200 / 135 240 / 165 215 / 145 210 / 150

310U 320U 625U 635U 950U 1260U

30 / 1800 30 / 1800 30 / 1800 40 / 2400 40 / 2400 40 / 2400

23 / 1380 30 / 1800 37 / 2250 50 / 3000 65 / 3900 65 / 3900

C: 30 /1800
B: 30 / 1800

C: 60 /3600
B: 57 / 3420

C: 72 /4350
B: 68 / 4080

C: 100 /6000

B: 95 / 5700

C: 123/7380
B: 117 /7020

128 128 128 212 288 288

14,3 28,7 36,0 50,3 68,9 83,4

+

10

/-2

[0.1 hPa]

+

10

/-2

[0.1 hPa]

+

10

/-2

[0.1 hPa]

+

10

/-2

[0.1 hPa]

+

10

/-2

[0.1 hPa]

8,5 +/-0,1 8,5 +/-0,1 8,5 +/-0,1 8,5 +/-0,1 8,5 +/-0,1 8,5

9,0 +/-0,1

@ PP05

9,0 +/-0,1

@ PP04

9,0 +/-0,1

@ PP04

9,0 +/-0,1

@ PP04

9,0 +/-0,1

@ PP04

30 / 1800 30 / 1800 30 / 1800 40 / 2400 40 / 2400 40 / 2400

23 / 1380 30 / 1800 37 / 2250 50 / 3000 65 / 3900 65 / 3900

C: 30 / 1800

B: 30 / 1800

C: 60 / 3600
B: 57 / 3420

C: 72 / 4350

B: 68 / 4080

C: 100/6000

B: 95 / 5700

C: 123/7380
B: 117 /7020

128 128 128 212 288 288

14,4 29,1 36,4 60,9 69,8 84,4

10+/-2

[0.1 hPa]

10 +/-2

[0.1 hPa]

10 +/-2

[0.1 hPa]

10 +/-2

[0.1 hPa]

10 +/-2

[0.1 hPa]

8,5 +/-0,1 8,5 +/-0,1 8,5 +/-0,1 8,5 +/-0,1 8,5 +/-0,1 8,5

9,0 +/-0,1

@ PP05

9,0 +/-0,1

@ PP04

9,0 +/-0,1

@ PP04

9,0 +/-0,1

@ PP04

9,0 +/-0,1

@ PP04

30 / 1800 30 / 1800 30 / 1800 40 / 2400 40 / 2400 40 / 2400

23 / 1380 30 / 1800 37 / 2250 50 / 3000 65 / 3900 65 / 3900

C: 30 / 1800

B: 30 / 1800

C: 57 / 3420
B: 54 / 3240

C: 68 / 4350

B: 65 / 3900

C: 95 / 6000

B: 90 / 5400

C: 117/7020

B: 111 / 660

128 128 128 212 288 288

13,3 26,5 32,8 46,4 63,7 76,9

+

10

/-2

[0.1 hPa]

+

10

/-2

[0.1 hPa]

+

10

/-2

[0.1 hPa]

+

10

/-2

[0.1 hPa]

+

10

/-2

[0.1 hPa]

9,9 +/-0,1 9,9 +/-0,1 9,9 +/-0,1 9,9 +/-0,1 9,9 +/-0,1 9,9

10,4 +/-0,1

@ PP05

10,4 +/-0,1

@ PP04

= 9,97 kWh/m3 / 2] H

i,n

10,4 +/-0,1

@ PP04

10,4 +/-0,1

@ PP04

= 8,57 kWh/m3 / 3] H

i,n

10,4 +/-0,1

@ PP04

= 12,87 kWh//kg

i,n

C: 135/8100
B: 130 /7800

+

10

/-2

[0.1 hPa]

+

/-0,1

+

/-0,1

9,0

@ PP04

C: 135/8100
B: 130 /7800

+

10

/-2

[0.1 hPa]

+

/-0,1

+

/-0,1

9,0

@ PP04

C: 130/7800
B: 124 /7440

+

10

/-2

[0.1 hPa]

+

/-0,1

+

/-0,1

10,4

@ PP04

23

deltaSchwank

8 Operating

description

Fault

Start-up

If heat demand exists, the fan of gas-/ air ratio
unit will start up automatically.

After a pre-purge period of 20 seconds in start
speed [PP04] the automatic ignition starts
[max. ignition time 5 sec.]. The gas valve with
pressure regulator opens the gas supply to
venturi mixer. The burner flame is controlled by
an ionisation electrode. The ignition is switched
off, if the ionisation electrode reports a flame
to the burner control unit IC 4000/1 within the
safety time.

If the ignition process fails, the burner control
IC 4000/1 repeats the start-up for one more
time.

Operation

The heater continues to run after successful
ignition at the start speed for one minute,
regardless of the heat requirement.
Combustion takes place through the bluTek
burner within the special combustion chamber
design.
The hot flue gas heats the tube surface while
being fed through the tubes by the fan. The
hot radiant tubes emit long-waved infrared
radiation which is optimal directed into the
room by the reflector construction.

The heater is operated in a modulation ratio of
1:2 for optimum adaptation to the heat
demand.
The heater starts always at start speed for a
period of
1 minute and then according to the applied
heating signal.

If no flame is reported during the pre-purge
period [including 1 repetition of ignition
process], the burner control unit IC 4000/1 will
switch off the radiant tube, error will give, fan
runs in post-purge time for 3 minutes in
maximum speed [PP06] and then heater will
lock it.

Investigation and repair must be carried out
by authorized personnel only. After clearance
of the fault, the lock can be reset.
The cause of the fault / error code is displayed
on the central control unit SchwankControl
Touch or can read out via corresponding
service software.
See chapter 12 for error codes.

Lock release can carry out by activate the
reset command via the central control unit
SchwankControl Touch or an interruption of
the electric power supply for 3 sec. A new
start-up begins. If no flame signal is reported to
the burner control unit IC 4000/1 during
operation, the gas valve shuts and stops the
gas supply immediately. A new start-up
process is repeated.



Error codes and troubleshooting on
pages 49 -50

The radiant tube heater deltaSchwank works
with a closed combustion system. The
combustion air is taken from outside [or from
the room]. The exhaust gas is evacuated
directly by a special air/exhaust pipe system
through roof, wall or indirectly into the room.

24

9 Assembly

instructions

For the assembly of the heater is a



Scope of delivery

deltaSchwank 310U / 320U

- 1x Reflector section combustion chamber
[FERAN]

- 1x Reflector end section L=440mm

- 1x Outer combustion chamber tube

140mm / L= 3050mm

lifting platform with work surface from
min. 1.5m width and 4.0m length
necessarily.
For the assembly are needed 2
people.

deltaSchwank

- 1x bluTek-burner kit in cardboard
[including bluTek-burner,
burner baffle + gasket]

tube 1

Version 003 deltaSchwank 16/19 Technical specification subject to change

- 1x Inner combustion chamber tube
stainless steel L= 1500mm

- 1x Radiant tube L= 3050mm with
turbulator [coloured ring marking]

- 2x Intermediate reflector

- 1x Mounting set deltaSchwank 310U / 320U

- 1x bluTek-burner kit in cardboard

[including bluTek-burner,
burner baffle + gasket]

deltaSchwank 625U / 635U

- 1x Reflector section combustion chamber
[FERAN]

- 1x Reflector section

- 1x Reflector end section L=440mm

- 1x Outer combustion chamber tube

140mm / L= 5950mm

- 1x Inner combustion chamber tube stainless
steel

deltaSchwank 625: L= 1500mm
deltaSchwank 635: L= 2500mm

tube 2

tube 1

tube 2

- 1x Radiant tube L= 5950mm with 2x turbulator

[2x coloured ring marking]

- 2x Intermediate reflector

- 1x Mounting set deltaSchwank 625U / 635U

25

deltaSchwank

deltaSchwank 950U

- 1x Reflector section combustion chamber [FERAN]

- 2x Reflector section

- 1x Reflector end section L=550mm

- 1x Outer combustion chamber tube

140mm / L= 5950mm

- 1x Inner combustion chamber tube
stainless steel L= 3000mm

- 2x Radiant tube L= 3050mm with turbulator
[coloured ring marking]

- 1x Radiant tube L= 5950mm

- 1x Trapezoidal sheet for combustion chamber

L=1000mm

- 4x Intermediate reflector

- 1x Mounting set deltaSchwank 950U

- 1x bluTek-burner kit in cardboard

[including bluTek-burner,
burner baffle + gasket]

tube 1

tube 2

tube 4

tube 3

deltaSchwank 1260U

- 1x Reflector section combustion chamber [FERAN]

- 2x Reflector section

- 1x Reflector end section L=550mm

- 1x Outer combustion chamber tube

140mm / L= 5950mm

- 1x Inner combustion chamber tube
stainless steel L= 3000mm

- 2x Radiant tube L= 5950mm with 2x turbulator
[2x coloured ring marking]

- 1x Trapezoidal sheet for combustion chamber
L=1000mm

- 4x Intermediate reflector

- 1x Mounting set deltaSchwank 950U

- 1x bluTek-burner kit in cardboard

[including bluTek-burner,
burner baffle + gasket]

tube 1

tube 2

26

tube 4

tube 3

deltaSchwank

Version 001 Schwank superTube 50/09 Technische Änderungen vorbehalten

deltaSchwank 310U / 320U

Tools you need



• hexagonal wrench or ratchet
[width: 10, 13]

• socket wrench [width: 7 and 8]

• hand riverter

Note before mounting

 Hang first the suspension brackets and observe

the specified distance dimension between them.

 Fix the guide shell on the first suspension bracket

[direct after burner kit] with 2x screws M8x16 /
washers / lock washers / nut for guide the outer
combustion chamber tube.

 The outer tube combustion chamber

L = 3050 mm has to be mount on the right side
of the suspension bracket [in the flow direction]

- check the correct stud bolt position on the
bracket!

 Flanges are mounted with flange packing

[each 8 or 4 screws/washers/lock washers/nuts
M8].

 Observe the respective flange positions of the

outer combustion chamber tube during
assembly ­8-hole flange shows to the bluTek-burner kit!

 Turn welding seam of the tubes to the side.
 Tube with turbulator [colored ring marking] has

to be mounted behind the turnaround box [in
flow direction]. The coloured ring showing to the
turnaround box!

 During mounting turnaround box to outer

combustion chamber tube observe the position
of the opposite 8-hole flange. Vertical position
of a hole with simultaneous sideways position of
the welding seam is to be kept.

 Inner combustion chamber tube [stainless steel]

L=1500 mm will be slide in outer combustion
chamber tube, position from inner to outer tube
will be ensured with final assembly bluTek-burner
kit and bluTek- burner!

 Tube bars and bracket bars have to be fixed by

nuts/3D-washers/lock washers M8 on the
suspension brackets.

 Clamping bars [black painted or with colored

dot] for tubes 140 and 100 mm are mounted
on the last suspension bracket. Observe the
specified mounting distance between
suspension bracket and turn aroundbox of
50mm before tightening!

 The intermediate reflectors have to be fixed into

the reflector. At both ends of the reflector sheet

the intermediate reflector will riveted with 2
stainless steel rivets [reflector has already holes
to set the rivets]. An additional short angle
bracket is to be fixed by rivets in the centre of
the main reflector to hold the intermediate
reflectors.

 The combustion chamber reflector is placed on

suspension brackets and have to be fixed with
the bracket bars by 6x M5 [screws/washers/
self-locking nuts]. Reflector end with notch on
sides shows to the turnaround box.

 The reflector end segment L = 440mm is placed

on the reflector and have to be fixed with 3x M5
screws.

 Both front plates have to be fixed by 6x M5

[screws/washers/self-locking nuts].

 Insert bluTek-burner L=128 mm with its

3 stud bolts into the corresponding flange holes
of inner combustion chamber tube. Place
between tube flange and bluTek-burner a
gasket.

 In addition a burner baffle together with gasket

has to mount in front of the bluTek burner
whereby the flap shows diagonally downwards.

 The bluTek-burner kit [first without mounted

igniter] is mounted to 8-hole flange and burner
gasket by 8x M8 [screws / washers / lock
washers / nuts]. Now insert smoothly the igniter
through the corresponding holes in the
connection adapter, avoiding destruction of
the igniter ceramic.

 Now firmly screw bluTek-burner kit with 8-hole

flange.

 Fit the igniter and igniter gasket with 2x M4 nuts

to the stud bolts of the connection adapter.

 Connect the straight ignition cable plug with

igniter and ionisation cable with burner control
unit IC 4000/1.

 Remove the protective foil from the housing

flap bluTek-burner kit and stick the “Schwank”
foil on bottom of this flap.

 Remove the remaining protective foils from

bluTek-burner kit.

 The perforated adapter covering is to fit at the

mounting angle of the bluTek-burner kit by
means of tapping screws.

 For a quick external identification of the

assigned MODBUS address stick the provided
address-sticker [number] on the bottom bluTek­burner housing and enter there the
corresponding address by number stickers or
with marker.

27

deltaSchwank

g

Fig 20: Mounting deltaSchwank 310U / 320U









Fig 21: Mounting interface combustion chamber

deltaSchwank 310U / 320U

 Exhaust gas connection [Type B23, C]:

Note that the stainless steel flexible pipe
mounted at the end of the tube with a gasket.

 Accessory

Exhaust gas adapter code-no. 126 7035 0

Mount the exhaust gas adapter at the end of
the tube with a gasket.
Ensure a vertical exhaust gas extension of at
least 0.5m.

Clamping bar
[black painted or with coloured dot]

 bluTek-burner L=128 mm
 Inner combustion chamber tube

stainless steel 100 mm, L=1500 mm

 Gasket tube 140 mm
 8-hole flan

e outer tube combustion chamber

Version 003 deltaSchwank 16/19 Technical specification subject to change

28

deltaSchwank

Version 001 Schwank superTube 50/09 Technische Änderungen vorbehalten

deltaSchwank 625U / 635U

Tools you need



• hexagonal wrench or ratchet
[width: 10, 13]

• socket wrench [width: 7 and 8]

• hand riverter

Note before mounting

 Hang first the suspension brackets and observe

the specified distance dimension between them.

 Fix the guide shell on the first suspension bracket

[direct after burner kit] with 2x screws M8x16 /
washers / lock washers / nut for guide the outer
combustion chamber tube.

 The outer tube combustion chamber

L= 5950 mm has to be mount on the right side of
the suspension bracket [in the flow direction] ­check the correct stud bolt position on the
bracket!

 Flanges are mounted with flange packing

[each 8 or 4 screws/washers/lock washers/nuts
M8].

 Observe the respective flange positions of the

outer combustion chamber tube during
assembly ­8-hole flange shows to the bluTek-burner kit!

 Turn welding seam of the tubes to the side.
 Tube with turbulator [colored ring marking] has

to be mounted behind the turnaround box [in
flow direction]. The coloured ring showing to the
turnaround box!

 During mounting turnaround box to outer

combustion chamber tube observe the position
of the opposite 8-hole flange. Vertical position
of a hole with simultaneous sideways position of
the welding seam is to be kept.

 Inner combustion chamber tube [stainless steel]

deltaSchwank 625U: L=1500 mm
deltaSchwank 635U: L=2500 mm

will be slide into outer combustion chamber

tube, position from inner to outer tube will be
ensured at final assembly bluTek-burner kit and
bluTek- burner!

 Tube bars and bracket bars have to be fixed by

M8 nuts/3D-washers/lock washers on the
suspension brackets.

 Clamping bars [black painted or with colored

dot] for tubes 140 and 100 mm are mounted
on the last suspension bracket. Observe the
specified mounting distance between
suspension bracket and turnaround box of 30
mm before tightening!

 The intermediate reflectors have to be fixed into

the second reflector [not combustion chamber
reflector]. At both ends of the second reflector
sheet the intermediate reflector will riveted with
2 stainless steel rivets [reflector has already holes
to set the rivets]. An additional short angle
bracket is to be fixed by rivets in the centre of
the second reflector to hold the intermediate
reflectors.

 Start the reflector mounting at the turnaround

box side. Reflector with intermediate reflectors is
placed on suspension brackets and have to be
fixed with the bracket bars by 6x M5
[screws/washers/self-locking nuts]. Reflector end
with notch on sides shows to the turnaround
box.

 Following combustion chamber reflector is

placed on suspension brackets and have to be
fixed with the bracket bars by 6x M5
[screws/washers/self-locking nuts].

 The reflector end segment L= 440 mm is placed

on the reflector and have to be fixed with 3x M5
screws.

 Both front plates have to be fixed by 6x M5

[screws/washers/self-locking nuts].

 Insert following bluTek-burner

deltaSchwank 625U: L=128 mm

deltaSchwank 635U: L=212 mm

with its 3 stud bolts into the corresponding

flange holes of inner combustion chamber
tube. Place between tube flange and bluTek­burner a gasket.

 In addition a burner baffle together with gasket

has to mount in front of the bluTek burner
whereby the flap shows diagonally downwards.

 The bluTek-burner kit [first without assembled

igniter] is mounted to 8-hole flange and burner
gasket by 8x M8 [screws / washers / lock
washers / nuts].

 Now insert smoothly the igniter through the

corresponding holes in the connection adapter,
avoiding destruction of the igniter ceramic.

 Now firmly screw bluTek-burner kit with 8-hole

flange.

 Fit the igniter and igniter gasket with 2x M4 nuts

to the stud bolts of the connection adapter.

 Connect the straight ignition cable plug with

igniter and ionisation cable with burner control
unit IC 4000/1.

 Remove the protective foil from the housing

flap bluTek-burner kit and stick the “Schwank”
foil on bottom of this flap.

 Remove the remaining protective foils from

bluTek-burner kit.

29

deltaSchwank

g

 The perforated adapter covering is to fit at the

mounting angle of the bluTek-burner kit by
means of tapping screws.



For a quick external identification of the
assigned MODBUS address stick the provided
address-sticker [number] on the bottom bluTek­burner housing and enter there the
corresponding address by number stickers or
with marker.

Fig 22 : Mounting deltaSchwank 625U / 635U

Clamping bar
[black painted or with coloured dot]

 bluTek-burner

deltaSchwank 625U L=128 mm
deltaSchwank 635U L=212 mm

 Inner combustion chamber tube, stainless steel

deltaSchwank 625U 100mm, L=1500 mm
deltaSchwank 635U 100mm, L=2500 mm



Fig 23: Mounting interface combustion chamber







deltaSchwank 625U / 635U

 Gasket tube 140 mm
 8-hole flan

 Exhaust gas connection [Type B23, C]:

Note that the stainless steel flexible pipe
mounted at the end of the tube with a gasket.

 Accessory

Exhaust gas adapter code-no. 126 7035 0

Mount the exhaust gas adapter at the end of
the tube with a gasket.
Ensure a vertical exhaust gas extension of at
least 0.5m.

Version 003 deltaSchwank 16/19 Technical specification subject to change

e outer tube combustion chamber

30

deltaSchwank

Version 001 Schwank superTube 50/09 Technische Änderungen vorbehalten

deltaSchwank 950U

Tools you need



• hexagonal wrench or ratchet
[width: 10, 13]

• socket wrench [width: 7 and 8]

• hand riverter

Note before mounting

 Hang first the suspension brackets and observe

the specified distance dimension between them.
Note there are two different types of suspension
brackets [tube pair combination 140/100 mm
or 100/100 mm]!

hole on the left or right side of most right

the
located stay bolt on suspension bracket.
Hole on the left side identified tube pair
combination
100 / 100 mm. Hole on the right side bolt
identified tube pair combination

140 / 100 mm.

 Fix the guide shell on the first suspension bracket

[direct after burner kit] with 2x screws M8x16 /
washers / lock washers / nut for guide the outer
combustion chamber tube.

 The outer tube combustion chamber

L= 5950 mm has to be mount on the right side of
the suspension bracket [in the flow direction] ­check the correct stud bolt position on the
bracket!

 Flanges are mounted with flange packing

[each 8 or 4 screws/washers/lock washers/nuts
M8].

 Observe the respective flange positions of the

outer combustion chamber tube during
assembly, 8-hole flange shows to the bluTek­burner kit!

 Turn welding seam of the tubes to the side.

Welding seam of outer combustion



chamber tube is to be mounted upwards at
45°!

 Both tubes with turbulator [coloured ring

marking] have to be mounted in front and

behind the turnaround box. The coloured ring
showing to the turnaround box! Joint between
outer tube combustion chamber 140 mm and
following radiant tube 100 mm is carried out
by stainless steel flange adapter!

 Place the enclosed stainless steel trapezoidal

sheet on top of the inner combustion chamber
tube and insert the flap through the slot of the
flange and bend it over for fixation!

 Inner combustion chamber tube [stainless steel]

L=3000 mm inclusive trapezoidal sheet

Optical distinctive feature is

will be slide into outer combustion chamber
tube, position from inner to outer tube will be
ensured at final assembly bluTek-burner kit and
bluTek- burner!

 Tube bars and bracket bars have to be fixed by

M8 nuts/3D-washers/lock washers on the
suspension brackets.

 Clamping bars [black painted or with colored

dot] for tubes 140 and 100 mm are mounted
on the last suspension bracket. Observe the
specified mounting distance between
suspension bracket and turnaround box of 162
mm before tightening!

 The intermediate reflectors have to be fixed into

the second and third reflector [not combustion
chamber reflector]. At both ends of the
reflector sheets the intermediate reflector will
riveted with 2 stainless steel rivets [reflector has
already holes to set the rivets]. An additional
short angle bracket is to be fixed by rivets in the
centre of the second reflector to hold the
intermediate reflectors.

 Start the reflector mounting at the turnaround

box side. Reflectors with intermediate reflectors
are placed on suspension brackets and have to
be fixed with the bracket bars by 6x M5
[screws/washers/self-locking nuts]. Reflector end
with notch on sides shows to the turnaround
box.

 Following combustion chamber reflector is

placed on suspension brackets and have to be
fixed with the bracket bars by 6x M5
[screws/washers/self-locking nuts].

 The reflector end segment L= 550 mm is placed

on the reflector and have to be fixed with 3x M5
screws.

 Both front plates have to be fixed by 6x M5

[screws/washers/self-locking nuts].

 Insert following bluTek-burner L=288mm with its

3 stud bolts into the corresponding flange holes
of inner combustion chamber tube. Place
between tube flange and bluTek-burner a
gasket.

 In addition a burner baffle together with gasket

has to mount in front of the bluTek burner
whereby the flap shows diagonally downwards.

 Now firmly screw bluTek-burner kit with 8-hole

flange.

 Fit the igniter and igniter gasket with 2x M4 nuts

to the stud bolts of the connection adapter.

 Connect the straight ignition cable plug with

igniter and ionisation cable with burner control
unit IC 4000/1.

 Remove the protective foil from the housing

flap bluTek-burner kit and stick the “Schwank”
foil on bottom of this flap.

31

deltaSchwank

g

S

S

 Remove the remaining protective foils from

bluTek-burner kit.

 The perforated adapter covering is to fit at the

mounting angle of the bluTek-burner kit by
means of tapping screws.



For a quick external identification of the
assigned MODBUS address stick the provided
address-sticker [number] on the bottom bluTek­burner housing and enter there the
corresponding address by number stickers or
with marker.

Fig 24: Mounting deltaSchwank 950U



Fig 25 : Mounting interface combustion chamber







deltaSchwank 950U

 bluTek-burner deltaSchwank 950U L=288 mm
 Inner combustion chamber tube

stainless steel 100 mm, L=3000 mm

 Gasket tube 140 mm
 8-hole flan

 Exhaust gas connection [Type B23, C]:

Note that the stainless steel flexible pipe
mounted at the end of the tube with a gasket.

 Accessory

Exhaust gas adapter code-no. 126 7035 0

Mount the exhaust gas adapter at the end of
the tube with a gasket.
Ensure a vertical exhaust gas extension of at
least 0.5m.

Clamping bar

uspension bracket

tube pair combination



uspension bracket

tube pair combination 140 /  100 mm

e outer tube combustion chamber

Version 003 deltaSchwank 16/19 Technical specification subject to change

100 / 100 mm

32

deltaSchwank

Version 005 Schwank superTube 20/15 Technische Änderungen vorbehalten

deltaSchwank 1260U

Tools you need



• hexagonal wrench or ratchet
[width: 10, 13]

• socket wrench [width: 7 and 8]

• hand riverter

Note before mounting

 Hang first the suspension brackets and observe

the specified distance dimension between them.
Note there are two different types of suspension
brackets [tube pair combination 140/100 mm
or 100/100 mm]!

hole on the left or right side of most right

the
located stay bolt on suspension bracket.
Hole on the left side identified tube pair
combination
100 / 100 mm. Hole on the right side bolt
identified tube pair combination

140 / 100 mm.

 Fix the guide shell on the first suspension bracket

[direct after burner kit] with 2x screws M8x16 /
washers / lock washers / nut for guide the outer
combustion chamber tube.

 The outer tube combustion chamber

L= 5950 mm has to be mount on the right side of
the suspension bracket [in the flow direction] ­check the correct stud bolt position on the
bracket!

 Flanges are mounted with flange packing

[each 8 or 4 screws/washers/lock washers/nuts
M8].

 Observe the respective flange positions of the

outer combustion chamber tube during
assembly ­8-hole flange shows to the bluTek-burner kit!

 Turn welding seam of the tubes to the side.

Welding seam of outer combustion



chamber tube is to be mounted upwards at
45°!

 Both tubes with turbulator [coloured ring

marking] have to be mounted in front and

behind the turnaround box. The coloured ring
showing to the turnaround box! Joint between
outer tube combustion chamber 140 mm and
following radiant tube 100 mm is carried out
by stainless steel flange adapter!

 Place the enclosed stainless steel trapezoidal

sheet on top of the inner combustion chamber
tube and insert the flap through the slot of the
flange and bend it over for fixation!

 Inner combustion chamber tube [stainless steel]

L=3000mm inclusive trapezoidal sheet

Optical distinctive feature is

will be slide into outer combustion chamber
tube, position from inner to outer tube will be
ensured at final assembly bluTek-burner kit and
bluTek- burner!

 Tube bars and bracket bars have to be fixed by

M8 nuts/3D-washers/lock washers on the
suspension brackets.

 Clamping bars [black painted or with colored

dot] for tubes 140 and 100 mm are mounted
on the last suspension bracket. Observe the
specified mounting distance between
suspension bracket and turnaround box of
140 mm before tightening!

 The intermediate reflectors have to be fixed into

the second, third and fourth reflector [not
combustion chamber reflector]. At both ends of
the reflector sheets the intermediate reflector
will riveted with 2 stainless steel rivets [reflector
has already holes to set the rivets]. An
additional short angle bracket is to be fixed by
rivets in the centre of the second reflector to
hold the intermediate reflectors.

 Start the reflector mounting at the turnaround

box side. Reflectors with intermediate reflectors
are placed on suspension brackets and have to
be fixed with the bracket bars by 6x M5
[screws/washers/self-locking nuts]. Reflector end
with notch on sides shows to the turnaround
box.

 Following combustion chamber reflector is

placed on suspension brackets and have to be
fixed with the bracket bars by 6x M5
[screws/washers/self-locking nuts].

 The reflector end segment L= 550 mm is placed

on the reflector and have to be fixed with 3x M5
screws.

 Both front plates have to be fixed by 6x M5

[screws/washers/self-locking nuts].

 Insert following bluTek-burner L=288 mm with its

3 stud bolts into the corresponding flange holes
of inner combustion chamber tube. Place
between tube flange and bluTek-burner a
gasket.

 In addition a burner baffle together with gasket

has to mount in front of the bluTek burner
whereby the flap shows diagonally downwards.

 Now firmly screw bluTek-burner kit with 8-hole

flange.

 Fit the igniter and igniter gasket with 2x M4 nuts

to the stud bolts of the connection adapter.
Connect the straight ignition cable plug with



igniter and ionisation cable with burner control
unit IC 4000/1.

 Remove the protective foil from the housing

flap bluTek-burner kit and stick the “Schwank”
foil on bottom of this flap.

33

deltaSchwank

g

S

S

 Remove the remaining protective foils from

bluTek-burner kit.

 The perforated adapter covering is to fit at the

mounting angle of the bluTek-burner kit by
means of tapping screws.



For a quick external identification of the
assigned MODBUS address stick the provided
address-sticker [number] on the bottom bluTek­burner housing and enter there the
corresponding address by number stickers or
with marker.

Fig 26: Mounting deltaSchwank 1260U









Fig 27: Mounting interface combustion chamber

deltaSchwank 1260U

 bluTek-burner deltaSchwank 1260U L=288 mm
 Inner combustion chamber tube

stainless steel 100 mm, L=3000 mm

 Gasket tube 140 mm
 8-hole flan

 Exhaust gas connection [Type B23, C]:

Note that the stainless steel flexible pipe
mounted at the end of the tube with a gasket.

 Accessory

Exhaust gas adapter code-no. 126 7035 0

Mount the exhaust gas adapter at the end of
the tube with a gasket.
Ensure a vertical exhaust gas extension of at
least 0.5m.

Clamping bar
[black painted or with coloured dot]

uspension bracket



tube pair combination

100 / 100 mm

uspension bracket

tube pair combination 140 / 100mm

e outer tube combustion chamber

Version 003 deltaSchwank 16/19 Technical specification subject to change

34

10 Installation instructions

* Nat. Gas H: H

97 kWh/

3

/ Nat. Gas L: H

57 kWh/

3

3

Danger of fire and explosion!
Unprofessional handling of gas pipes,
gas connections and the appliance can
produce gas leaks. It is highly dangerous
if gas is ignited!
Working on gas pipes and the
appliances is only allowed by approved
installers.

Expansion of the heater!
When installing the heater, take into
account the thermal expansion of the
heater during operation.

Mount the flexible connections so that
those can compensate the longitudinal
expansion of the tube.Only use flexible
connections for the radiant tube
regarding:

• gas

• electricity and

• air [if necessary]

a

deltaSchwank

connection pressure in front of the gas
combination valve of the individual devices is
available at the nominal thermal load of the entire
system, according to table 6.

Please consider the pressure drop of the upstream
mounted gas connection and gas filter. For the
detailed pressure drop value of the Schwank gas­pipe-systems see table 7.

Minimum connection pressures in front of valve

deltaSchwank

heater type

Nat. Gas H*

310U - 1260U
Nat. Gas L* 310U - 1260U
Propane 310U - 1260U

: 9,

i,n

Tab 6: Min. connection pressures in front of

gas combination valve

m

Pressure drop Schwank gas-pipe-systems

deltaschwank

heater type connection unit

Nat. Gas H*

Nat. Gas L* 310 - 635 1/2" / L=800 mm

Propane 310 - 635 1/2" / L=800 mm

* Nat. Gas H: H

310 - 635 1/2" / L=800 mm

950 - 1260 3/4" / L=800 mm

950 - 1260 3/4" / L=800 mm

950 - 1260 3/4" / L=800 mm

: 9,97 kWh/m3 / Nat. Gas L: H

i,n

min. connection

pressure

[hPa]

15
20
40

: 8,

i,n

: 8,57 kWh/m

i,n

m

pressure drop

[hPa]

2

2,5

2
3
1
1

Version 005 Schwank superTube 20/15 Technische Änderungen vorbehalten

b

FIg 28: Longitudinal thermal expansion

Gas-pipe-system and mounting of
heaters

Connection of gas pipes to the appliance, supply
and the mounting of the appliance are only
allowed by professional personnel who is
registered, holding a current certificate of
competence and in accordance with the relevant
provisions of the gas safety [installation and use]
regulations.

Additional installation notices of national or local
institutions must be observed. The pipe must be
dimensioned in a way that the minimum

Tab 7: Pressure drop Schwank gas-pipe-systems

The max. connection pressure is 65 hPa!

In case of contaminated gas pipes and
generally at gas pipes of welded black
steel have to be mounted gas filter­groups directly in front of the heater.

35

deltaSchwank

[

]

h

Note the following points while installing the
gas-pipe-system:

 Use only gas lines as per national standards.
 Never hang heaters on the gas pipes.
 Mount a manual gas cock upstream of every

radiant tube.

 Close all gas cocks before carrying out the

leak test and disconnect the connection
between the gas cock and the burner to
avoid damages to the gas regulator and gas
combination valve.

 Clean gas pipes before the installation of the

heater. Reconnection after pressure control
and expansion.

Please observe the national standards.

Connect the heater with an approved
flexible hose!

 Use the following hose length for

deltaSchwank:

310 - 635 R ½“ length

800 mm

950 - 1260 R ¾“ length

800 mm

 Mount a flexible hose only with 90° bend or

with 2 x 90° elbow fittings in a 180° bend
according to Fig 29, 30 and 31.

 Keep the specified installation dimensions.
 Wrong mounting of flexible hoses shown in



Fig 32 [sketches

Fig 29: Vertical connection with 90° bend

430 mm

+/- 10 %

[+/- 10 %]

430 mm

to ].

Art.-No
192 0845 0

Art.-No
192 0846 0

Abb. 38: seitlicher Anschluss im 90°-Bogen

Fig 30: Sideward connection with 90° bend

Fig 31: Alternative connection 180° -bend with 2 x 90° elbow





Fig 32: Wrong mounting of flexible hoses

430 mm

(+/- 10%)

430 mm

[+/- 10%]

fittings

a

Version 003 deltaSchwank 16/19 Technical specification subject to change

a = 320 mm +/- 10%

h = 150 mm
h:

allowable height

displacement for mounting

h



36

Gas connection has to be positioned
with 90° or 180° bend in the axle of the
heater to compensate the thermal
expansion of the heater. Otherwise
torsional forces will operate on the hose!

Avoid twisting of the flexible hose!
When tightening the union, counter hold
the nipple on the hose.

Pay attention that the flexible hose will
not be mechanically damaged by tools
etc. Do not buckle the hose.

Do not mount damaged flexible hoses!
Damaged hoses can break due to the
movement of the heater.

Exhaust flue installation single heater

The exhaust system is available as variation of the
radiant heaters. The flue system is connected at
the end of the radiant tube. Note the information
in chapter 4 “Planning”.

deltaSchwank

Installation
exhaust collecting system
[herringbone]

The installation of the flue collecting system must
be carried out according to the planning of
Schwank.

 After mounting the heaters with their burner kits

the connection sets F [adapter and damper]
have to be mounted at the end of the tube
heater. The adapter must be fixed with a gasket
at the flange of the last radiant tube..

 The spiral tubes for the flue collecting system

with different lengths and dimensions must be
mounted according to Schwank planning.
When assembling the tube elements any burrs
or residue of oil and grease must be eliminated.

 All connecting tubes and collecting tubes must

be mounted with a small slope towards the
central exhaust fan [about 0,3 %, means 30 mm
per 10m]. Any dips and sinks in the tubes must
be avoided (to prevent collection of
condensate).

 The spiral tube elements are connected by

couplings. Each tube element must be fixed by
two self-tapping screws at opposite sides.
Screws may not be fixed at the bottom of the
tubes.

Version 003 deltaSchwank 16/19 Technical specification subject to change

 After fixing the tube elements with screws all

tube connections must be sealed carefully with
high temperature silicon [temperature resistant
at least up to 200 °C, named f.e. NOVASIL].
When starting the central exhaust fan for the first
time all tube connections have to be checked
for tightness.

 If the Schwank planning requires a condensate

run off, this part must be mounted directly in
front of the exhaust fan [deepest point of the
system]. The condensate run off has to be
connected to a condensate pump or a siphon
[min. water barrier height 30 cm].

37

deltaSchwank



Electrical installation
[wiring diagram]

Danger of electric shock!
Electric shocks are highly dangerous!
Working at the electrical equipment of
the appliance is only allowed by
professional personnel observing the
current IEE regulations.

Isolate the electrical supply while
working at the electrical equipment of
the appliance and safeguard the
appliance against unintentional
connection to the circuit.

The gas supply and electrical cable
must be situated on the outside of the
radiation and combustion heat. Only use
heat-resistant cables near the tubes.

The power supply for the heater must be
flexible connected with Ölflex- or
silicone cable.

Electrical connection
Operation with MODBUS control

Power supply

 Route a flexible 3-wire electrical connection

cable [max. 3 x1.5 mm
kit to the four-pin plug and connect the cable
according to connecting scheme [Fig 33].

 Connect 4-pin GDM socket with housing plug on

burner control unit IC 4000/1 of the burner kit.

 The power supply for the heater must be flexible

with maximal wire cross-section of 3x 1.5 mm
Ölflex- or silicone cable

 In order to disconnect the bluTek burner kit from

the electrical supply pull the plug out from IC
4000/1.

The 4-pin GDM plug for the power supply



bluTek burner kit is included in delivery
of the kit.

2

] for power supply burner

2

Electrical connection 4-pin plug

1 = neutral N

2 = phase L

3 = optional: error signal output 230 V

= PE

Fig 33: Electrical connection 4-pin plug

MODBUS communication

 Route a flexible 3-wire MODBUS cable

[max 3x 0.5 mm
the free cable gland of the burner control unit IC
4000/1 and connect it according to the
connection diagram [Fig 36].

 Maximum length between junction box MODBUS

and connection burner control unit IC 4000/1
may be 0.5 m.

 At the of each MODBUS communication circuit a

terminal resistance 120  must be set on the
relevant burner control unit IC 4000/1. Resistor is
already loosely plugged into each socket KN 8 of
the burner control unit IC 4000/1. This socket must
then be closed with the resistor.

 The necessary MODBUS address assignment is

explained on page 45.

2

] for the Modbus connection into

Electrical connection
exhaust gas collecting system

After conversion of the heaters to operation with
exhaust gas collection system they can be
electrically connected as described above.

Fig. 35 shows the wiring diagram between the
central control unit SchwankControl Touch control
and the peripherally required SchwankControl SAV
1 extension kit and SAV fan monitoring kit.

Further information and wiring schemes for
more different electrical connection



options [e.g. multi-zone operation,



grouping of several central control units
SchwankControl Touch,…] can be found
in „Electrical Compendium“.

Version 003 deltaSchwank 16/19 Technical specification subject to change

38

deltaSchwank

Version 003 deltaSchwank 16/19 Technische Änderungen vorbehalten

Fig. 34 : Connection scheme bluTek burner kit with MODBUS control to SchwankControl Touch

39

deltaSchwank

Version 003 deltaSchwank 16/19 Technical specification subject to change

Fig. 35: Connection scheme bluTek burner kit exhaust collecting system with SchwankControl
Touch / Extension kit Fan Control SAV1

40

Fig 36: Internal wiring diagram bluTek-burner kit deltaschwank

deltaSchwank

Version 003 deltaSchwank 16/19 Technische Änderungen vorbehalten

41

deltaSchwank



11

Commissioning

instructions

Before commissioning

A qualified service engineer must carry out this
operation. The correct operation and fixing of
the heater is prerequisite for the warranty.
Checking gas lines and flue system is not
included in this service.

The heaters are only pre-set by the



Check the function of the following equipment:

 Exhaust flue
 Combustion air supply
 Control unit
 Safety equipment

manufacturer and must be adjusted
for proper operation according to gas
quality site on site.
For this information contact your local
gas company.

Version 002 deltaSchwank 19/18 Technical specification subject to change

 Safety of electrical circuit

Pay attention when commissioning!
Vaporization of remaining grease of
metal units may cause greasy mist.
This kind of mist disperses after
approx. 30 minutes. During this time
the room has to be ventilated.

42

Parameter IC 4000/1 and setting

The burner control unit IC 4000/1 is already
factory preset.
The parameters can be read out by the
Schwank Service Software IC 4000 [RS-485
interface board] and if necessary to be
changed.

Parameter selection and settings can made
manually direct at IC 4000/1 by the two push
buttons SW 2 and SW 3 and the 7-segment
display.
For this, unscrew the lid of the IC 4000/1 burner
control.

After power supply IC 4000/1 following
sequence is shown on the 7-segment display:

1. segment test, all 7 segments light up

2. software version [two successive numbers]

3. burner control software: 1

deltaSchwank

Parameter Parameter name and

Factory setting Set range

parameter value definitions

PP01 Setting Communication

0: No MODBUS control [e.g. ThermoControl M+]
1: MODBUS contol by SchwankControl Touch

PP02 Drive Fan

0: Phase angle control driven
1: PWM driven

PP04 PWM FAN START SPEED

Version 002 deltaSchwank 19/18 Technical specification subject to change

PP05 PWM FAN MIN SPEED

PP06 PWM FAN MAX SPEED

20 – [“PP06 PWM FAN MAX SPEED” or 180]

[Note 1]

20 – [“PP06 Fan PWM FAN MAX SPEED” oder 130]

[Note 2]

[“PP04 PWM FAN START SPEED” or “PP05 PWM MIN
SPEED or 30] –180

[Note 1], [Note 2]

1 0 - 1

1 0 -1

xx
according to type
see Tab 5, page 23
xx
according to type
see Tab 5, page 23
xx
according to type

see Tab 5, page 23

20 - 180

20 - 130

30 - 180

PP09 APS monitoring for PWM driven fan

0: APS disabled for PWM fan
1: APS enabled for PWM fan

Tab 8: Parameter level IC 4000/1

Note 1: PP06 >= PP04
Note 2: PP06 >= PP05

0 0 -1

43

deltaSchwank

Fig 37: 7-segment display and push buttons IC 4000/1

ON normal working mode DISP1 is blank.

When you need to enter parameter setting:

- Press SW2 and SW3 buttons together for 3
seconds.

- Parameter number “1” is displayed on DISP1.

- Press SW2 to increase the parameter number,
press SW3 to decrease the parameter number.

- When you reached the target parameter
number, press SW2 and SW3 buttons together
for 3 seconds to reach the setting level for the
value.

- For parameters PP03, PP07, PP08 parameter
number starts to flash on DISP1.

- For parameters PP01 und PP02 parameter
value starts to flash on DISP1.

- Now you can increase the parameter value by
pressing SW2, and decrease it by pressing
SW3.

- To store the new parameter setting, press SW2
and SW3 buttons together for 3 seconds.

- Parameter menu is closed and DISP1 is blank
again.

Parameter settings menu has 10
minutes timeout. If you don’t press
any button for 10 minutes, control
exits from parameters menu
automatically without saving the
settings.

Fig 38: MODBUS addressing IC 4000/1 by

DIP switches

Dip switch position below

Dip switch position above

External identification
MODBUS address

For a quick external identification of the
assigned MODBUS address, please enter the
corresponding address [number] on the
provided MODBUS-address label by number
stickers or with marker pen.
MODBUS-address label is to stick on the bottom
side bluTek-burner kit housing.

Version 002 deltaSchwank 19/18 Technical specification subject to change

Assignment MODBUS address

For every heater [= burner control unit] it is
mandatory to assign an MODBUS address if it
controlled by SchwankControl Touch.
All heaters are assigned with the MODBUS
address 1 in the delivery state. To change the
MODBUS address, the lid of the IC 4000/1 burner
control unit must be opened.
The MODBUS address is set by the DIP switches
in the lower right side of the board. A maximum
of 31 addresses can be assigned per heating
zone.

44

deltaSchwank

Version 003 deltaSchwank 16/19 Technical specification subject to change

Adjusting nominal heat load /
Modulating range

Note!
Gas flow are factory set to natural gas
or propane. You may only commission
the system after adjustment.

Check connection pressure

 Open first the gas cock which is at the end of

the flexible gas hose [Fig.39].

 Open the test nipple connection pressure.

Connect the pressure measuring instrument to



the test nipple
connection pressure.

 Close the test nipple after the measurement

and check if the test nipple is gas-tight.

Adjusting nominal maximum load

[see Fig. 40]

 Switch heater in full load [MAX Speed PP06]

means by of
a) activating chimney sweep mode on central
control unit SchwankControl Touch or
b) selection PP06 on Schwank service software
IC 4000 or
c) selection PP06 directly with pushbuttons on
board IC 4000/1 [see page 44]

 Adjustment CO



after about ca. 10 minutes operation,

according to values Tab 5, page 24

by small slot screwdriver or hex wench 2mm



higher CO2-value:
turn gas throttling screw
lower CO2-value:



turn gas throttling screw
anti clockwise [+]

and determine the

-value at gas throttling screw

2



clockwise [+]



Adjusting OFFSET in lowest speed

[see Fig. 40]

 Switch heater in lowest speed

means by of

 a) selection START speed PP04 or MIN speed

PP05 [whatever is lower] on central control unit
SchwankControl Touch or

 b) selection START speed PP04 or MIN speed

PP05 directly with pushbuttons on board IC
4000/1 [see page 44] or
d) restart heater and use start speed
sequence of 1 minute

 Control CO

necessary adjustment with OFFSET-screw
according to values Tab. 5, page 24

by hex wench 2mm

 Measure CO

pressure [differential pressure]
via



[Recommendation to use differential pressure
gauge with max. 5 hPa measuring range]



higher CO2-value and p-OFFSET:
turn OFFSET-screw



lower CO2-value and p-OFFSET:
turn OFFSET-screw

 Check adjustment CO2-values in minimal and

maximal speed again. If it necessary repeat
procedure.

 Close test nipple

and check if the test nipple is gas-tight.
Reconnect the pressure air intake measuring
tube to the regulator.

Fig. 39: Gas cock

-value and p-OFFSET and if it

2

-value and effective OFFSET-

2

and -.



clockwise [+]



anti-clockwise [-]



after the measurement



,

45

deltaSchwank

Fig 40: Measuring set up adjusting nominal load /

modulating range

Version 003 deltaSchwank 16/19 Technical specification subject to change

46

deltaSchwank

Commissioning exhaust gas
collecting system [herringbone]

Before first start up

For first start up and commissioning of the system
please request a Schwank service engineer to
attend Adjustment by Schwank is a condition of
our warranty.

Gas fired radiant tube heater systems have to be
installed by a qualified engineer according to
local laws and rules in force.

Start up

 First check the complete electrical supply and

connections of the system. All plugs at the
burner units must be taken off. Check the
correct connection of the plugs. After this the
room temperature regulation system is
switched on. Check the connection and the
direction of the rotation of the central exhaust
fan.

 Check the complete connecting and

collecting tube system for a small slope
towards the central fan [no sinks for
condensate!].

 Check the slope from central exhaust fan to

the chimney.

 Check the complete flue gas system for

tightness with central exhaust fan on [burners
off]. In case of leaks ensure tightness by high
temperature silicon.

Correct start up and commissioning without
system tightness is not possible!

Commissioning

 The safe evacuation of the exhaust gases of

all heaters is ensured by correct adjusting of
negative pressure. This is done by fixing the
dampers at the end of the heaters and may
be also the damper in front of the central
exhaust fan at the following values.

Required negative pressure level at test nipple
OFFSET [cold conditions]:

- deltaSchwank 310U..1260U: -1.0 hPa

 Adjustment with central fan on, burners off.

 Start the adjustment with the heater furthest

away from the central exhaust fan. Take the
negative pressure at the measurement nipple
at the bottom of the burner unit. Therefore
take off the silicon tube between nipple and
solenoid valve. Negative pressure is adjusted
by moving the damper at the end of the tube
heater. After adjustment the silicon tube has
to be connected again between the nipple
and solenoid valve.

 Adjustment of the other burner now follows

with the same procedure.

 Having adjusted all the heaters the negative

pressure of the units may have changed. A
second thorough check and adjustment of
the negative pressure of the units is necessary.
Then the positions of the dampers must be
fixed by the screw.

 Now the heaters can be started up [opposite

sequence to adjustment].

 Now the negative pressure at test nipple

nozzle pressure is checked [burners off,
dampers at the end of the tubes completely

Version 002 deltaSchwank 19/18 Technical specification subject to change

open]. The minimum negative pressure under
these conditions must be >1 hPa.
In case the negative pressure level is lower
please check again the tightness of the
complete system. Also check that the damper
in front of the central exhaust fan is open.

47

deltaSchwank

12 Service guide /

Trouble shooting

Maintenance and annual check
[herringbone]

A regular maintenance is the requirement for a
faultless operation of the appliance.

According to the National Standard Regulations,
heating-systems with radiant tubes must be
checked at least once a year.

Maintenance and troubleshooting is only allowed
by professional personnel that is competent and
instructed in radiant tubes.

Before starting work on the heater the
gas cock has to be closed.

Maintenance must include the following checks:
 Check surface of combustion chamber

tubes/radiant tubes and if fit necessary clean up.

 Check the slope of the tubes [3 mm/m in

direction of the turnaround box connection]

 Check correct and firm connection of the

reflectors and intermediate reflectors.

 Check tightness of gas-carrying parts and

connections.

 Check the flexible gas hose for correct

installation and tightness.

 Check electrical connection to the burner kit.
 Check the air/flue-system

 Check firm mounting and tightness of gas-/air

ratio control unit within burner kit.

 Check condensation pipes.
 Check the safety functions of the ignition- and

ionisation-controls, gas valves and operation
indicator

 Check functionality Functional test of control

and regulation equipment, switchgear and
signal lights

 Check gas filter in case of reduced line

pressure, in case of pollution change filter pad
[spare part kits gas filter]

 Check correct parameter setting.
 Check safety distances and information boards.

Any deviations must be fixed immediately. Defect
parts must be changed directly.

Maintenance work on gas valves, flame sensing
and safety devices can only be maintained by the
manufacturer or authorized personnel.

After the end of the maintenance work,



the device must be put back into
operation!

Version 002 deltaSchwank 19/18 Technical specification subject to change

48

deltaSchwank

Error codes

If an error occurs, all gas valves are closed and the
lockout message output [230 V] is activated and
the error code is stored internally and transmitted
by MODBUS to the central control unit
SchwankControl Touch.

The fan still runs for 180 seconds in the post-purge
time with maximum fan speed. After that, the
heater is completely switched off and locked
The lock can be reset by activating the reset
function SchwankControl Touch or switching off
the power supply [min. 3 seconds] of the heater.

Error code "A" does not put the heater in a reset­requiring lock, but only switches off the heater.

Error
code

1

2

3 APS

4 APS

Error name Description

Ionization error
during start

Ionization error
during operation

open error

[APS=
air pressure switch]

closed error

If flame is not
detected for the 2
ignition attempts
during start

If flame is not
detected for the 2
ignition attempts
after a flame loss

Error Is given if phase
angle control type is
selected [PP02=0]

Error is given if APS
contact opens
during start or
operation

Error Is given if phase
angle control type is
selected [PP02=0]

7 Gas valve

feedback error

8

10

Ionization
component error

MODBUS signal
missing error

Tab 9: Error code IC 4000/1

Error in gas valve
drive or feedback
check circuitry

Ionization signal is
out of range

If PP01=01 selected
as MODBUS control
and for more than
3 minutes no
MODBUS signal has
been received this
error is given and
heater switch off.
Burner control is not
locked.

Error is given if APS
contact already

Version 002 deltaSchwank 19/18 Technical specification subject to change

5 Encoder signal

missing error

6 Unexpected

“encoder signal
”error

closed during start
Error Is given if PWM

control is selected
[PP02=1]

Error is given if no
encoder signal
detected or fan
speed < 10 RPS.

This error is given
after 3 sec.

Error Is given if phase
angle control type is
selected [PP02=0]
and encoder signal
is detected > 30 RPS.

This error is given
after 3 sec.

49

deltaSchwank

Troubleshooting / Error cause

Error code 1:

- no gas [e.g. gas line not vented, gas cock

closed]

- faulty gas valve

- Ignition and ionization electrodes damaged /

dirty

- wrong setting gas throttling screw

- poor grounding

Error code 2:

- poor low ionization current [<0,7A DC]

- too low connection pressure

Error code 5:

- PWM fan don’t run

[e. g. impeller broken , motor broken]

- PWM cable broken

Error code 7 + 8:

- internal error IC 4000/1

Error code 9:

- Wrong setting fan speed parameters

[PP04, PP05, PP06]

- Damaged fan [e.g. bearing failure]

13

In case of change of gas type the corresponding
CO2 value has to be set by means by of gas
throttling screw and the parameters burner control
IC 4000/1 according to Tab. 5, page 24.

Change of gas type

Version 002 deltaSchwank 19/18 Technical specification subject to change

Error code 10:

- interruption MODBUS connection >3 minutes

- wrong wiring between IC4000/1 and

SchwankControl Touch

Example: right connection B and - / A and +

MODBUS Assignment

IC 4000/1

B A COM

Tab 10: Error causes

+ - REF

MODBUS Assignment

SchwankControl

50

deltaSchwank

14 Accessory

tetraSchwank

Increase energy efficiency through utilisation of
condensing technology from the exhaust gas heat
by counterflow exchanger between the heater
and wall/roof terminal.

Assembly instruction

Before starting installation tetraschwank the



ventilator must be plugged with high-temperature
resistant sealing compound and secured with at
least 3 sheet metal screws.
Mount grating of suction opening and fixing



bracket on the ventilator with sheet metal screws.
Ventilator must be hang separately.
Note the suction direction of the ventilator.



Note the outflow direction downwards of the



ventilator.
tetraSchwank heat exhanger should be mounted



with slight slope [3 mm/1m] to the T-piece.
An extension of the flue gas installation is



permitted only in exceptional cases.
tetraSchwank must be suspended by two



premounted fastening clamps. Chains or steel
cables have to be fixed in vertical direction.
A condensate drain must be fitted with a siphon



at the T-piece.
Condensate pipes must be installed with a slope



to the discharge into the sewer system.
Connect the ventilator as shown in Fig. 41 to the



central control unit Schwank Control Touch.

Electrical connection ventilator

Version 021 infra D Form_U 16/19 Technische Änderungen vorbehalten

Fig. 41: Electrical connection tetraSchwank to SchwankControl Touch

51

deltaSchwank

















15 Spare parts

1

Fig 42: Spare parts deltaSchwank 635U

22

2

16 17 18

24

10

20

28

2625

12

Spare parts radiant kit deltaSchwank

Pos. Part Art.-No

bluTek-burner kit deltaSchwank 310U Natural Gas 026 1000 0
bluTek-burner kit deltaSchwank 320U Natural Gas 026 1001 0

1

2
3
4
5
6
7 Trapezoidal sheet for combustion chamber deltaschwank 950U und 1260U [not in Fig 42] 126 1074 0
8
9
10
11
12
13
14
15
16 Reflector section combustion chamber 126 1058 0
17 Reflector 126 1059 0
18 Reflector end section L=440 mm 126 1060 0
19 Reflector end section L=550 mm [not in Fig 42] 126 1061 0
20 Intermediate reflector 126 1062 0
21 Mounting bracketl intermediate reflector [not in Fig 42] 126 1062 1
22
23
24 Suspension bracket bar 126 1078 0
25
26
27
28
29 Mounting set deltaSchwank 310U / 320U [not in Fig 42] 126 1063 0
30 Mounting set deltaSchwank 625U / 635U [not in Fig 42] 126 1064 0
31 Mounting set deltaSchwank 950U [not in Fig 42] 126 1065 0
32 Mounting set deltaSchwank 1260U [not in Fig 42] 126 1066 0

bluTek-burner kit deltaSchwank 625U Natural Gas 026 1002 0
bluTek-burner kit deltaSchwank 635U Natural Gas 026 1003 0
bluTek-burner kit deltaSchwank 950U Natural Gas 026 1004 0
bluTek-burner kit deltaSchwank 1260U Natural Gas 026 1005 0
Outer combustion chamber radiant tube FAL
Outer combustion chamber radiant tube FAL
Inner combustion chamber tube stainless steel
Inner combustion tube stainless steel 100mm / L=2500 mm [not in Fig 42]
Inner combustion chamber tube stainless steel

Radiant tube FAL 100mm / L=3050 mm with turbulator [not in Fig 42]
Radiant tube FAL 100mm / L=5950 mm [not in Fig 42]
Radiant tube FAL 100mm / L=5950 mm with 2 turbulators
Tube connector from 140mm to 100 mm [not in Fig 42]
Turn around box tube combination 140 mm /
Turn around box tube combination 100 mm /
Gasket tube 140 mm [8-holes] [not in Fig 42]
Gasket tube 100 mm [not in Fig 41]

Suspension bracket for tube combination
Suspension bracket for tube combination

Tube bar 140 mm
Clamping tube bar 140 mm [black painted or with coloured dot]
Tube bar 100mm
Clamping tube bar 100mm [black painted or with coloured dot]

140 mm / L= 5950 mm
140 mm / L= 3050 mm [not in Fig 42]

100 mm / L=3000 mm [not in Fig 42]

100 mm / L=1500 mm [not in Fig 42]

100 mm
100 mm [not in Fig 42]

140 mm / 100 mm
100 mm / 100 mm [not in Fig 42]

126 1001 0
126 1000 0
126 1069 0
126 1068 0
126 1067 0

126 7055 0
126 7199 0
126 1057 0
126 1056 0
126 1004 0
126 1003 0
126 1005 0
126 7048 0

126 1007 0
126 1006 0

126 1008 0
126 1009 0
126 1008 0
126 4529 5

Version 003 deltaSchwank 16/19 Technical specification subject to change

52

Spare part bluTek-burner kit deltaSchwank

14

4 - 6

deltaSchwank

11

Version 003 deltaSchwank 16/19 Technical specification subject to change

Fig 43: Spare part bluTek-burner kit

3

10 12

12

7- 9

Pos. Part Art.-No

1 Spark igniter with ionisation cable deltaSchwank 126 1023 0
2 Ignition cable with straight plug 126 1051 0
3 Automatic burner control IC 4000/1 deltaSchwank [without mounting plate and wiring] 126 1091 1
4 Gas- / air ratio control unit NRV 118 [in cardboard] 126 1083 0
5 Gas- / air ratio control unit NRV 128 [in cardboard] 126 1083 1
6 Gas- / air ratio control unit NRV 148 [in cardboard] 126 1083 2

7 bluTek-burner L=128 mm 126 1013 1
8 bluTek-burner L=212 mm 126 1014 1
9 bluTek-burner L=288 mm 126 1015 1
10 Gasket bluTek-burner 126 1018 0
11 Gasket igniter 126 1019 0
12 Perforated cover adapter 126 1050 0
13 LED-operation indicator [not in Fig 43] 126 1024 0
14 Corrugated gas pipe with gaskets 126 1027 0
15 Spare part kits for gas filter ½“ [not in Fig 43] 192 0758 0
16 Spare part kits for gas filter ¾“ [not in Fig 43] 192 0759 0

Please only use Schwank original spare parts.
The installation of spare parts which are not named or recommended by the manufacturer can
lead to failure or damage of the heater.

53

deltaSchwank

16 EC type examination certificate

Version 003 deltaSchwank 16/19 Technical specification subject to change

54

deltaSchwank

Version 003 deltaSchwank 16/19 Technical specification subject to change

55

17 EC declaration of conformity

deltaSchwank

Version 003 deltaSchwank 16/19 Technical specification subject to change

56

deltaSchwank

p

]

18 Product information related to Ecodesign

Regulation No 2015/1188

Fuel Natural gas / Propane

Values

310U 320U 625U 635U 950U 1260U

deltaSchwank

Nominal heat input [kW] @ NCV

Minimum heat input [kW] @ NCV

Minimum heat input as percentage of

nominal heat in
h

[%] @ GCV

Therm al 

at nominal heat input
h

[%] @ GCV

Therm al 

at minimal heat input

Radiant factor RF

at nominal heat input

Radiant factor RF

at minimal heat input

Auxiliary elect ricity consumption

at nominal heat input

Auxiliary elect ricity consumption

at minimal heat input

Heat output control type

Space heating emissions NOx @ GCV
[mg/kWh]

ut [%

nom

min 

[%]

[%]

@ NCV

@ NCV

el

el

max

max

[kW]

[kW]

10,0 20,0 25,0 35,0 48,0 58,0

7,5 10,0 12,5 17,5 25,0 29,0

25% 50% 50% 50% 48% 50%

86,8% 83,2% 83,0% 80,9% 82,3% 83,1%

87,2% 86,8% 85,9% 84,4% 84,6% 85,8%

80,6% 78,1% 80,3% 78,6% 83,7%

80,9% 80,6% 82,2% 83,2% 82,0% 83,4%

0,03 0,04 0,04 0,08 0,17

0,03 0,03 0,02 0,03 0,05 0,11

modulat ing modulat ing modulat ing modulating modulating modulating

60 60 60 60 60

80,9%

0,29

60

Version 003 deltaSchwank 16/19 Technical specification subject to change

NCV=Netcalo rif icvalue
GCV=Gros scalo rif icvalue

Tab 11: Characteristic values energy performance deltaSchwank

99,0%Seasonal energy efficiency [%] 98,2% 99,0% 98,9% 97,4% 97,6%

57