Kroll 25S User manual

Technical Manual
25 S - 110 S
Status: Oct. 2009
880910

Edition: Oct. 2009
Technical changes for product improvement subject to change without
notice.
Copyright and manufacturer :
Company Kroll GmbH
Contents
Contents page
Description of the heater 3
Assembly notes 4
Heater overview 5
Technical data 25 S – 110 S 6
Dimensions table 25 S – 110 S 7
Technical data K – Units 8
AAccessories - schematic 9
Warm air heater’s – intake accessories 10- 12
Warm air heater’s – outlet accessories 13- 15
Fixation accessories 16
Warm air heater’s attachment parts – burner – fresh air supply 17 - 18
Flue gas accessories 19
Warm air heater’s electric accessories 20- 22
Room thermostats 23
Burner - mounting 24- 25
Putting the fan motor into service 26- 27
Changing the fan belt
Tightening the fan belt
28
Mounting of intake and outlet accessories 29
Spare parts list 30
Wiring diagrams 31- 32
Declaration of conformity 33
2

Kroll warm air heaters type S are directly-fired and highly variable units.
Contrary to other heating systems, they can be installed inside the room. The devices are exclusively made for
industrial use in halls and large capacities of each kind, especially in locations where heat is immediately
needed.
The Kroll warm air heaters (S) are made of high-quality material and are manufactured clean cut. Thus, they
guarantee trouble-free operation and durability. Special attention is given to quick and simple installation as
well as to easy servicing.
The casing is constructed of a solid galvanized framework. The screwed panels consist of 1,25 mm galvanized
and powder-coated steel sheet – inside and outside. Due to the framework construction and the removable
panels, the warm air heaters can be dismounted.
Radiator : The complete combustion chamber and the heat exchanger are made of chrome-alloyed,
highly heat-resistant stainless steel. The unit of the combustion chamber and heat exchanger works
by a 3-way-draught-system. They are re-screwed via a flanged joint. Thus, the whole unit can easily be
disassembled into two pieces which allows a quick set up even in small rooms and easy
replacement/renewal of parts.
Fan: In the lower part of the cabinet, silent tangential fans and maintenance-free ball bearings are mounted.
Driving is made directly or via a standart three-phase motor with V-belt-drive. All heaters are standard
equipped with three thermostats which have the following regulators: TR-, TW- and safety temperature
controller STB.
As standard version, the heaters have a plenum with three-sides outlet with horizontally and vertically
adjustable lamellas. On request (against additional charge), other outlet variants or ducting systems are
available.
General information: As to the installation of the units, the respective security specifications and directives of
your country have to be respected. The decrees for carrying out “Immissions security regulation” and
according to this the enacted legal decrees have to be observed as described in your country.
You are only allowed to use oil or gas burners which have been tested especially for this type of heater. If the
heaters are delivered by the manufacturer including oil or gas burners, the separate manual of the burner has to
observed.
Please pay especially attention:
- to the official directives for the installation of warm air
heaters
- to the generally relevant security requirements
- to setup and operate according to your country’s regulations
- to grant a fuel supply according to your country’s regulations
- the VDE-regulations
- to the fact that warm air heaters are fireplaces and thus
categorically subject to authorisation and notifiable
- the regulations for prevention of accidents and other safety-
relevant regulations and directives.
Heater description
3

As to the installation of the units, the respective security specifications and valid directions of your country
have to be observed.
Where to install the heater
Before you choose the place where the heater will be installed, make sure that your requirements do not work
against:
a) fire protection
b) function (e.g. room heating, with plenum or ducting system, low or high pressure at the place of
installation...)
c) specific requirement (heat demand, air delivery, demand of outer or ambient air, air humidity, room
temperature, air distribution, necessary space…)
d) connection to the chimney
e) possibilites of doing installation, repair and maintenance
f) relation of room volume to rated heating power, especially in naturally ventilated rooms
The natural air delivery is sufficient for the combustion if for example the room volume in m³ is
equivalent to the 10-fold rated heat load in kW of all heating units in the room and if the windows
and doors assure a natural ventilation.
Good and natural ventilation means for example:
1. the room volume in m³ is at least equivalent to the 30-fold rated heat load of all heating units in
the room and the doors and windows assure a natural ventilation. OR:
2. the room has got openings for supply air and exhaust air near floor or ceiling which cannot be
closed and whose size corresponds to the 0,0003-fold rated heat load in kW of all heating units
in the room.
Suction of comburstion air:
The combustion air should be free of any harmful substances. If, due to production process,
harmful substances (such as chloride, CKW, FKCW etc.) appear which could reach the warm air
heater, the combustion air for the burner must be taken from outside and a burner case has to be
used (see accessories).
A sufficient supply of combustion air is assured if it is taken in from:
- the room where the warm air heater is installed if this room meets the requirements to the
relation of room volume to total heating efficiency (4 m³ / kW) according to the construction
supervision);
- the room where the warm air heater is installed if it is heated by the warm air heater driven by
outside air or secondary air with a granted rate of outside air; there has no fixed relation
between room and power to be observed;
- the room where the warm air heater is installed if it has got openings to outside which cannot be
locked up, according to the requirements of construction supervision;
- the outside through a pipe connected to the burner (or its housing) whose profile is large
enough; it must be adapted to the available throughput of the burner and the line
resistances (including the suction protection grill) in order to grant a perfect combustion.
Installation notes
4

Heater overview
Complete with suction components and and plenum with 3-sides-
outlet; with drive; switch box; thermostat, completely wired.
Standard version
Without intake and outlet components, for higher pressure; with drive, switch
box, thermostat; completely wired, lying or standing version.
5
Ducting
version

Warm air heater for oil or gas burner. For direct outlet with air outlet louvres. Complete with air intake parts and air outlet blind, outlet to three
sides, with drive, integrated switch box and thermostat, flue gas socket to the back, completely wired, with drilled burner plate. Burner against
extra charge.
Technical data
Warm air heater
Standard
oil
-
fired
25S 40S 55S 70S 95S 110S
Combustible Fuel oil
Rated heating power kW 25,5 37,5 50,5 64 88 100
Rated heat load kW 28 40 55 70 95 110
Consumption combustible kg/h 2,36 3,4 4,64 5,9 8,00 9,30
Rated air rate m³/h 1.450 2.710 3.400 4.300 6.000 7.000
Air rate m³/h 1.650 2.900 3.700 5.000 6.750 7.650
Nominal pressure Free air outlet
Temperature rise ~ tLK 43 42 45 44 44 44
Difference in flue gas
temperature
~ tAK 170 165 160 165 160 170
Efficiency of firing % 91 91,5 92 91,5 92,5 91
Requested chimney draught 0 0 0 0 0 0
On-resistance (combustion
chamber)
Pa 30 30 35 60 70 90
Electric power consumption V/Hz/
A
230~/50/
2,1
230~/50/
3,65
230~/50/
6,84
230~/50/
6,9
400/3~
3,6
400/3~
3,6
Electrical connection kW 0,44 0,8 1,5 1,5 1,68 1,68
Fan motor power kW 0,26 0,62 1,3 1,2 1,5 1,5
Flue gas tube Ø mm 130 130 130 180 180 180
Noise level oil burner dB(A) 68 71 71 69 69 69
Dimensions
Lenght mm 715 865 975 1085 1.150 1.150
Width mm 455 505 585 665 765 765
Height mm 1275 1500 1645 1835 1.895 1.985
Weight without burne
r
kg 93 124 157 191 245 265
Type of Protection IP 44
CE – Ident-No. According to
EC-Directive for gas-fired
heaters
CE-0085BS5025
Technical data 25 S - 110 S
25S to 70S 95S to 110S
6

Type A B C D EØ F G Ø H Ø J
Weight
25S 715 455 1275 910 130 385 150 130 595 93
40S 865 505 1500 1110 130 495 150 130 750 124
55S 975 585 1645 1195 130 505 150 130 805 157
70S 1085 665 1835 1425 180 605 150 130 995 191
95S 1150 765 1895 1545 180 645 170 130 1075 245
110S 1150 765 1985 1545 180 645 170 130 1075 265
Alle dimensions in mm
Size measurment table
7

K = for ducting system
Oil or Gas-fired warm air heater. K-unit for connecting accessories and ducting systems.
Intake open to 3 sides (D, E, F), without hood; with drive, switch box, thermostat; completely wired.
External
Outlet pressure
Pa
100 150 200 250 300 350
VN
(1,2/20°C) Motor Current
consumption Lp Motor Current
consumption Lp Motor
Current
consumption Lp Motor
Current
Consumpt. Lp Motor
Current
consumpt. Lp Motor Stromauf
nahme Lp
Type
m³/h kW V A dB(A) kW V A dB(A) kW V A dB(A) kW V A dB(A) kW V A dB(A) kW V A dB(A)
25 S 1450 0,38 230 1,7 64 0,65 230 2,8 65 0,65 230 2,8 65 0,65 230 2,8 66 1,0 230 5,3 68 1,0 230 5,3 68
40 S 2710 0,65 230 2,8 68 1,1 230 6,2 69 1,1 230 6,2 69 1,1 230 6,2 70 1,28 230 6,6 71 1,28 230 6,6 72
55 S 3400 0,9 230 3,6 69 1,1 230 4,2 70 1,1 230 4,2 70 1,1 400 2,3 71 1,1 400 2,3 72 1,1 400 2,6 73
70 S 4300 1,1 230 4,2 69 1,5 400 3,6 70 1,5 400 3,6 70 1,5 400 3,6 71 1,5 400 3,6 72 2,2 400 5,2 73
95 S 6000 1,5 400 3,6 68 2,2 400 5,2 69 2,2 400 5,2 69 2,2 400 5,2 70 2,2 400 5,2 72 3,0 400 6,6 73
110 S 7000 1,5 400 3,6 69 2,2 400 5,2 70 2,2 400 5,2 70 3,0 400 6,6 71 3,0 400 6,6 73 3,0 400 6,6 74
Technical data K-units
8

The warm, air heaters for ducting systems can be equipped or supplemented with the shown accessories. The
accessories are made of galvanised sheet metal.
standing lying on the left lying on the right
A = up left right
1 Suction components 2 Outlet components 3 Fixation components 5 Flue gas com
100 Dummy cover Outlet components
200 and 220 for
ducting systems
320 Wall console 510 Flue gas elbow
105
A
ir circulation grid
(mounted at standard
version depending on
requested power)
205 False cover 330 Base frame for floor 520 Flue gas pipe
115 Transition piece 207 Connection frame for
ducting system
331 Base frame for ceiling
suspension
530 Flue gas cleaning-
Tee
116 Transfer adapter 210 Standart plenum for
direct air outlet
540 Roof connection
120 Louver (at least
double-sided with
automatic reversal)
220 Plenum to the long
side
4
A
ir supply elements for
burner
541 Roof plate
135 Cassette filter 221 Plenum to the front
side
400 Burner casing 542 Rosette
140 Fire lid 230 T-cowl to the long
side
410 Suction elbow 543 Rain hood
150 Silencer 231 T-cowl to the short
side
420 Suction pipe
160 Wall socket 240 Plenum to the top,
longside
430 Suction parts with screen
(wall duct)
170 Weather-protective
grid
241 Plenum to the top,
front side
440 Roof duct
243 Plenum to the top,
rounded
441 Roof plate
249 Elbow 442 Rosette
250 Plenum 443 Rain hood
Accessories - schematics
Liegende Ausführung:
LL = liegend links
LR = liegend rechts
(Abbildung LL)
View „C“ (front)
If
y
ou look frontall
y
at the burner
Stehende Ausführung
B = down ri
g
ht left
left down u
p
C = front front front
up
back
r
i
g
h
t
back
d
own
back
9
= Steel chimney

100 Base frame dummy cover
A
longside
Measure[mm] 25 S 40 S 55 S 70 S 95 S 110 S
a 635 785 895 1005 1070 1070
b 385 495 505 605 640 640
Frontal
a 375 425 505 585 685 685
b 385 495 505 605 640 640
105 Air circulation grid
A
longside
Measure[mm] 25 S 40 S 55 S 70 S 95 S 110 S
a 375 785 895 1005 685 685
b 385 495 505 605 640 640
Frontal
a 375 425 505 585 685 685
b 385 495 505 605 640 640
115 Transition piece
A
longside (between warm air heater and fire lid)
Measure[mm] 25 S 40 S 55 S 70 S 95 S 110 S
a 635 985 795 905 970 970
b 285 395 405 505 545 545
c 711 711 797 894 894 894
d 400 400 503 565 634 634
l 250
Profile 20
Frontal (between warm air heater and fire lid)
a 275 325 405 485 585 585
b 285 395 405 505 545 545
c 711 711 797 894
d 400 400 603 565
l 250
Profile 20
116 Transition piece
Alongside and frontal (between fire lid + cassette filter)
Measure[mm] 25 S 40 S 55 S 70 S 95 S 110 S
a 711 711 797 894 894 894
b 400 400 503 565 634 634
c 690 690 690 600 900 900
d 390 390 390 600 600 600
l 250
Profile 20
Warm air heater – attachment parts
1 Suction components
10

120 Louver
Alongside (Adjustment manually or by motor)
Measure[mm] 25 S 40 S 55 S 70 S 95 S 110 S
a 500 700 800 900 1000 1000
b 315 450 450 450 560 560
l 120
Profile 20
Frontal (Adjustment manually or by motor)
a 300 400 450 450 630 630
b 315 450 450 450 560 560
l 120
Profile 20
135 Pocket air filter G4
Measure[mm] 25 S 40 S 55 S 70 S 95 S 110 S
a 690 690 690 600 600 900
b 390 390 390 600 600 900
l 250
Profile 20
140 Fire lid
A
longside and frontal
Measure[mm] 25 S 40 S 55 S 70 S 95 S 110 S
a 711 711 797 894 894 894
b 400 400 503 565 634 634
l 500
Profile 20
Warm air heater – attachment parts
1 Suction accessories
11

Warm air heater – attachment parts
1. Suction accessories
150 Silencer alongside and frontal
Measure[mm] 25 S 40 S 55 S 70 S 95 S 110 S
a
b
l To be designed separately according to calculation
Profile
160 Wall socket and plug-in-socket
Wall socket
Measure[mm] 25 S 40 S 55 S 70 S 95 S 110 S
a
b
l According to calculation; lenght depending on thickness of
the wall
Profile 1-sided
Plug-in-socket
Measure[mm] 25 S 40 S 55 S 70 S 95 S 110 S
a
b
l According to calculation, silencer without idnication
Profile 1-sided
170 Weather protection grid
Free cross-section = a x b x 0,6
Measure[mm] 25 S 40 S 55 S 70 S 95 S 110 S
a
b
l According to calculation, silencer without idnication
12

200 Delivery air grid, horizontal + vertical louvers
Alongside (nominal dimensions)
Measures[mm] 25 S 40 S 55 S 70 S 95 S 110 S
a 325 425 525 625 825 625
b 125
frontal (nominal dimensions)
Measures[mm] 25 S 40 S 55 S 70 S 95 S 110 S
a 325 325 425 525 625 625
b 125
205 Dummy cover
alongside
Measure[mm] 25 S 40 S 55 S 70 S 95 S 110 S
a 350 450 550 650 850 650
b 160 160 160 160 160 260
frontal
a 350 350 450 550 650 650
b 160 160 160 160 160 260
220 Plenum
alongside to the front
Measure
[
mm
]
25 S 40 S 55 S 70 S 95 S 110 S
a 615 765 875 985 1055 1055
b 355 405 485 565 665 665
d 180 220 250 280 320 320
Profile 20
221 Plenum
frontal to the side
Measure
[
mm
]
25 S 40 S 55 S 70 S 95 S 110 S
a 355 405 485 565 665 665
b 615 765 875 985 1055 1055
d 200 240 270 300 400 400
Profile 20
Warm air heater – attachment parts
2. Outlet accessories
13

Warm air heater – attachment parts
2. Outlet accessories
alongside
Measure[mm 25 S 40 S 55 S 70 S 95 S 110 S
a / c / g 615 765 875 985 1055 1055
b / d 180 220 250 280 320 320
h 355 405 485 565 665 665
Profile 20
231 Outlet T-hood
frontal
Measure[mm 25 S 40 S 55 S 70 S 95 S 110 S
a / c / g 355 405 485 565 665 665
b / d 180 220 250 280 320 320
h 615 765 875 985 1055 1055
Profile 20
240 Plenum
Alongside up
Measure
[
mm 25 S 40 S 55 S 70 S 95 S 110 S
a 615 765 875 985 1055 1055
b 355 405 485 565 665 665
c / d According to indication
l 500
Profile 20
241 Plenum
Frontal up
Measure[mm
]
25 S 40 S 55 S 70 S 95 S 110 S
a 615 765 875 985 1055 1055
b 355 405 485 565 665 665
c / d According to indication
l 500
Profile 20
243 Plenum
Upside round
Measure[mm 25 S 40 S 55 S 70 S 95 S 110 S
a 615 765 875 985 1055 1055
b 355 405 485 565 665 665
d Ø 355 400 450 500 600 600
l 500
Profile 20
14

Warm air heaters – attachment parts
2. Outlet accessories
For plenum type 250
Measure[mm] 25 S 40 S 55 S 70 S 95 S 110 S
a According to indication
b According to indication
Profile 20
250 Plenum
Measure[mm] 25 S 40 S 55 S 70 S 95 S 110 S
a According to indication
b According to indication
l 530 630 630 630 730 730
d 310 410 510 510 610 310
e 110 110 110 210 210 210
Profile 20
260 Plenum
Standard louvers, horizontal lamellas
Measure
[
mm
]
25 S 40 S 55 S 70 S 95 S 110 S
a 615 755 875 985 1055 1055
b 355 405 485 565 665 665
l 500 600 700 700 900 900
Profile 20
Louver 2x
425x125
2x
525x125
2x
625x125
2X
625x225
3X
825x125
3X
825x125
15

Warm air heaters – attachment parts
3 Mounting parts
310 Standing frame
Measure[mm] 25 S 40 S 55 S 70 S 95 S 110 S
a 725 875 985 1095 1160 1160
b 465 515 595 675 775 775
c 500 500 500 500 500 500
Profile 50 x 50
320 Wall bracket alongside
By pairs
Measure[mm] 25 S 40 S 55 S 70 S 95 S 110 S
a 540 590 640 720 820 820
b 375 445 450 510 585 585
Tube 40 x 40 x 3
330 Basic frame
For lying version
Measure[mm] 25 S 40 S 55 S 70 S 95 S 110 S
a 1270 1495 1640 1830 1890 1890
b 635 785 895 1005 1070 1070
Tube 50 x 30 x 3,0
331 Basic frame
Ffor ceiling mounting and lying version
Measure[mm] 25 S 40 S 55 S 70 S 95 S 110 S
a 1270 1495 1640 1830 1890 1890
b 635 785 895 1005 1070 1070
c 800 950 1060 1170 1230 1230
Tube 50 x 30
x 3,0
50 x 30
x 3,0
50 x 30
x 3,0
50 x 30
x 3,0
50 x 30
x 3,0
50 x 30
x 3,0
16

Warm air heater – attachment parts
4. Burner – fresh air supply
Measure[mm 25 S 40 S 55 S 70 S 95 S 110 S
a 450 450 450 490 490 490
b 375 470 470 490 490 490
c 150
d 200 200 200 300 300 300
e 200
f 400 400 400 500 500 500
Profile 20
410 Aspiration elbow
Measure[mm 25 S 40 S 55 S 70 S 95 S
d Ø 150 150 150 150 150
b 70 70 70 70 70
c 150 150 150 150 150
á 90°
420 Aspiration tube
Measure[mm 25 S 40 S 55 S 70 S 95 S 110 S
d Ø 150 150 150 150 150 150
b 70 70 70 70 70 70
l 1000 1000 1000 1000 1000 1000
430 Suction end piece
With strainer
Measure[mm 25 S 40 S 55 S 70 S 95 S 110 S
d Ø 150 150 150 150 150 150
b 70 70 70 70 70 70
l 500 500 500 500 500 500
440 Roof duct
For roof
Measure[mm
]
25 S 40 S 55 S 70 S 95 S 110 S
Aspiration
tube Ø 150 150 150 150 150 150
d Ø 250 250 250 250 250 250
l 500 500 500 500 500 500
17

441 Roof plate
Measure[mm
]
25 S 40 S 55 S 70 S 95 S 110 S
Aspiration
tube 150 150 150 150 150
a 750 750 750 750 750
d Ø 251 251 251 251 251
442 Rosette
Measure[mm 25 S 40 S 55 S 70 S 95 S 110 S
Aspiration
tube Ø 150 150 150 150 150 150
a Ø 300 300 300 300 300 300
b Ø 151 151 151 151 151 151
l 50 50 50 50 50 50
443 Rain hood
Measuremm] 25 S 40 S 55 S 70 S 95 S 110 S
Aspiration
tube Ø 150 150 150 150 150 150
a Ø 150 150 150 150 150 150
b Ø 380 380 380 380 380 380
l 500 500 500 500 500 500
Warm air heater – attachment parts
18

Warm air heater – attachment parts
5. Flue accessories
With door 90
Measure[mm 25 S 40 S 55 S 70 S 95 S 110 S
d Ø 130 130 180 180 180
b 130 130 180 180 180
á 90°
520 Flue gas pipe
Measure[mm
]
25 S 40 S 55 S 70 S 95 S 110 S
d Ø 130 130 130 180 180 180
l 1000
530 Flue gas cleaning T-piece
Measure
[
mm 25 S 40 S 55 S 70 S 95 S 110 S
d Ø 130 130 130 180 180 180
b 300
c 130 130 150 150 150 150
l 1000
540 Roof duct pipe
Measure
[
mm 25 S 40 S 55 S 70 S 95 S 110 S
Flue gas pipe
Ø
130 130 130 180 180 180
Ø 230 230 230 280 280 280
l 1000
543 Rain hood
Measure
[
mm 25 S 40 S 55 S 70 S 95 S 110 S
Flue gas pipe
Ø
130 130 130 180 180 180
d Ø 340 340 340 430 430 430
b 131 131 131 181 181 181
l 260
19

Mounting
Installation must only be made by an authorized electrical specialist!
Faulty operations may damage the control unit!
We are not liable for damages caused by wrong connection and/or improper use.
- Before working with the unit, switch the wires to neutral.
- Wires can also have line voltage when the unit is switched off!
- Connection must only be made by authorized professionals!
- In order to connect the unit, open it by loosening the 4 knurled screws. Remove the lower plastic plate.
- The unit must only be drilled through at the indicated spots in the corners of the box’s bottom. Drilling through the rear panel of the unit may
cause perilous touch voltage, destroys the unit and expires all warranty claims.
- Connection must be made according to the enclosed simplified diagram!
- The unit is only supposed to be connected to fix-installed wires.
- The VDE 0100 (GermanElectrical Engineering Association) and EN 60730, part 1, have to be observed.
- The regulations of the local electric supply company musst be observed.
- The temperature sensor must be mounted in a way that it can measure the average room temperature (do not place it near supply air or outlet air
ducts).
- In order to avoid interferences, the sensor-wires shall not be installed together with other current-carrying wires.
- If the unit does not work, please check first of all, if the connection has been done corerctly and if the power supply is adequate.
- During installation of the unit, make sure that power supply wires (such as network supply) encounter low voltage wires (such as
sensor wires and control wires for hatches) – minimum distance 4 mm with basic-insulated conductors. Furthermore, make sure that
all connection conducturs are protected against self-loosening (according to EN 60730, part 1). This can be assured by using cable
connectors to tether the wires.
Control elements
Temperature range
Differential gap
Sensor KTY-semiconductor
Setpoint value setting
Other settings
Working voltage
Power input
Electric connections
Box material
Fixation
Protection
Weight
allowed ambient temp.
storing temp.
See imprint on front panel
+/- 0,5 K
(no need to pay attention to
polarity)
rotary knob white ? Day
rotary know black ? Night
see clock timer
230 V AC
ca. 2,0 VA
screw connections
plastic
at the wall
IP 54
ca. 420 g
------------- 10 + 50
.............. -10 + 70°C
Warm air heater – electrical accessories
20
Optic display: time with
hours, minutes,
seconds, day, month,
weekday.
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