Giersch R20-L User manual

Technical Information • Installation Instructions
Oil
Issued October 2007
Right reserved to effect technical
changes in the interest of product im
provement !
R20 / R30
GB

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Overview ........................................................................................................... 3
General information ................................................................................................................... 3
Declaration of conformity ........................................................................................................... 3
Checking scope of delivery and connection data....................................................................... 3
Operating instructions ................................................................................................................ 3
Instruction of operating personnel.............................................................................................. 4
Maintenance and customer service ........................................................................................... 4
Key for code designation ........................................................................................................... 4
Technical specifications ............................................................................................................. 4
Installation ......................................................................................................... 5
Installing flange and burner........................................................................................................ 5
Checking electrode setting......................................................................................................... 5
Establishing electrical connections ............................................................................................ 5
Connecting the oil ...................................................................................................................... 5
Oil pump..................................................................................................................................... 6
Function ............................................................................................................. 7
Control device ........................................................................................................................... 7
Measurement of the photocurrent.............................................................................................. 8
Air volume adjustment ............................................................................................................... 8
Servomotor ............................................................................................................................... 9
Oil control (optional) ................................................................................................................... 11
Startup ............................................................................................................... 13
Table of settings R20 ................................................................................................................. 13
Table of settings R30 ................................................................................................................. 14
Design ............................................................................................................... 15
Exploded drawing and spare parts/parts list R20....................................................................... 15
Exploded drawing and spare parts/parts list R30 ...................................................................... 18
Service instructions/dimensions ........................................................................ 20
Boiler/burner conditioning .......................................................................................................... 20
Smokestack connection ............................................................................................................. 20
Exhaust gas thermometer .......................................................................................................... 20
Service position.......................................................................................................................... 21
Control dimensions ignition electrode ........................................................................................ 21
Wiring diagrams ......................................................................................................................... 22
Troubleshooting ......................................................................................................................... 27
Burner overall dimensions / boiler connection dimensions ........................................................ 28
Working ranges ......................................................................................................................... 28

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Overview
Overview
General information
The installation of an oil-fired system must conform to extensive regulations and requirements. It is there-
fore the duty of the installer to be familiar with all applicable regulations and requirements. Installation, star-
tup and maintenance must be performed with utmost care. Fuel oil type EL to DIN 51603 must be used.
The burner must not be operated in rooms with high levels of air humidity (laundry rooms), dust or corrosive
vapours.
Caution !
Improper installation, adjustment, modification, operation or maintenance may result in
physical injury or damage to property/equipment.
Read the instructions prior to use.
This product must be installed in conformity with the valid regulations (e. g. DIN-VDE,
DIN-DVGW).
The design and degree of protection of the burner make it suitable for operation in enclosed rooms.
Declaration of conformity
We declare that GIERSCH R 20/30 Series oil blower burners with the assigned
product identification numbers:
R20 CE-0031 AT 2345
R30-AE CE-0032 AT 2343
R30-Z-L CE-0032 AT 2344
meet the basic requirements of the following directives:
• "Low Voltage Directive" according to 73/23/EEC in conjunction with DIN VDE 0700 Part 1 / Ed. 04.88
and DIN VDE 0722 / Ed. 04.83
• "Electromagnetic Compatibility" according to Directive 89/336/EEC in conjunction with EN 55014 /
Ed. 04.93 and EN 50082-1 / Ed. 01.92
• "Efficiency Directive" according to Directive 92/42/EEC in conjunction with DIN EN 267/ Ed. 12.96
• "Machinery Directive" as per directive 98/37/EEC
These products conform with the design sample tested at the designated centre 0031/0032.
Checking scope of delivery and connection data
Before installing the GIERSCH oil burner please check the items supplied for completeness.
Items supplied:
Burner, fastening unit, separate operating instructions, technical information, flange gasket, one 7-pin and
one 4-pin plug-type connector (for version -Z and -ZS only).
Oil jets are not included in the standard specifications.
Operating instructions
The operating instructions together with this technical information leaflet must be displayed in a clearly vi-
sible position in the boiler room. It is essential to write the address of the nearest customer service centre
in the operating instructions.

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Overview
Instruction of operating personnel
Faults are often caused by operator error. The operating personnel must be properly instructed in how the
burner works. In the event of recurring faults, Customer Service should be notified.
Maintenance and customer service
The complete system should be checked once a year for correct functioning and leaks by a representative
of the manufacturer or other suitably qualified person.
We accept no liability for consequential damage in cases of incorrect installation or repair, the fitting of non-
genuine parts or where the equipment has been used for purposes for which it was not intended.
Key for code designation
Technical specifications
Burner type
Technical data R20-(L) R20-V(-L) R20-(L)-AE R20-ZS-L R30-AE R30-Z-L
Min. burner output in kW 36 36 36 95
Max. burner output in kW 166 77 166 273
Min. boiler output in kW 33 31 33 87
Max. boiler output in kW 153 71 153 251
Fuel oil Type EL, to DIN51603
Method of operation 1-stage 1-stage 1-stage with
startup relief
2-stage 1-stage with
startup relief
2-stage
Voltage 1 / N / PE ~50 Hz / 230 V
Current consumption
Max. start / operation in A 2.3 / 1.1 3.2 / 2.0 2.3 / 1.1 2.8 / 1.6
Electric motor (2850rpm) in W 180 250
Oil pump in l/h 54 70
Photoelectric cell MZ 770S
Control box TF 830/832, DKW 972 (WLE)
Weight in kg 16.5 17.8 17.5 18.5 29
Noise emission in db(A) ≤ 73 ≤ 68 ≤ 73 ≤ 73 ≤ 75
hot air generators
air damper
oil preheater
start-up load reduction
2 stage
burner type
burner series
R30 -Z / AE-V-L-WLE

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Installation
Installation
Installing flange and burner
When installing the sliding flange, only tighten screws
1 and 2 otherwise it will not be possible to secure the
burner pipe with screw 3. Slide in the burner, adjust to
furnace depth and tighten the screws in the following
sequence: 3, 4, 5, raising the housing in the process.
Important: Secure the sliding flange so that the clam-
ping screw 3 is positioned at the top.
Checking electrode setting
• Move the burner into the service position as
described on Page 21.
• Check the ignition electrode setting
(see Page 21).
Establishing electrical connections
• Effect the electrical connection in the provided plug
unit in accordance with the wiring diagram.
• HEED LOCAL REGULATIONS !
• Protect the electrical feed line with a 10 A fuse.
• Use flexible cable.
For the key to the circuitry symbols, see Pages 22-26.
Connecting the oil
The table refers to heating oil EL 4.8 cSt and the inner diameter of the oil pipes. In the case of the suction
line length 4 elbows, 1 valve and 1 check valve have been taken into consideration for the resistance. On
account of possible gassing-off of the oil, dimension X should not exceed a length of 4 mtrs.
• Using the metal hoses provided connect the oil pump to the oil line.
• The pump should be connected to the feed and return lines (two-line system).
• If the tanks are positioned higher the pump can be converted to a single-line system.
Two-pipe system
pump Di
[mm]
H [m]
4 3 2 1 0 -1 -2 -3 -4
Suntec
or
Danfoss
621 18 16 13 11 8 5 - -
867 58 50 42 34 25 17 9 -
10 100 100 100 100 82 62 42 21 -
4-pin 7-pin

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Installation
Single pipe system
For pure single-pipe operation the bypass stopper
must be unscrewed out of the return line opening ➁
and the return line opening must be sealed with a gas-
ket and metal stopper.
For conversion to single pipe system, we recommend
to use a fuel oil filter with return feed. For this, the
pump remains in two-pipe operation. Install flow and
return burner pipes at the filter. Open the oil tap at the
filter. Start the installation.
Oil pump
On the version -AE (startup relief) or -Z (two-stage)
the oil burner starts up with a low pump pressure and
switches to the higher pump pressure, i.e. full output,
via the solenoid valve in the pump.
-AE Differential pressure max. 3 bar. Ex-works setting
10 and 13 bar.
-Z Ex-works setting 10 and 20 bar
The pump pressure can be set for the relevant output
(see Table of settings Pages 12-13).
To do so:
•Remove the sealing plug.
•Screw in the pressure gauge and adjust the pump
pressure by means of the control valve in accor
dance with the table of settings.
Key to Suntec pump:
➀= Feed line
➁= Return line
➂= Pressure pipe connection
➃= Pressure measuring connection
➄= Vacuum measuring connection
➅= Pressure adjustment 1st stage
➆= Pressure adjustment 2nd stage
➇= Solenoid valve 1st stage
➈= Solenoid valve 2nd stage
Oil
throughput
[kg/h]
Di
[mm]
H [m]
4 3 2 1 0 -1 -2 -3 -4
bis 2,5
477 68 58 49 40 31 22 13 -
6100 100 100 100 100 100 87 64 18
8100 100 100 100 100 100 100 100 56
2,5-5,0
439 34 29 25 20 16 11 6 -
6100 100 100 100 100 79 56 32 9
8100 100 100 100 100 100 100 65 28
5,0-10,0
419 17 15 12 10 8 - - -
698 86 74 63 51 39 28 16 4
8100 100 100 100 100 100 88 51 14
10,0-23,0 642 37 32 27 22 17 12 7 -
8100 100 100 85 69 54 38 22 6
Suntec:
2-stage

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Function
•Remove the sealing plug Ã.
• Screw in the pressure gauge and adjust the pump
pressure with the regulating screw Å.
Key to Danfoss pump:
À=Flow
Á=Return
Â=Pressure tube connection
Ã=Pressure measuring connection
Ä=Vacuum measuring connection
Å=Pressure adjustment
Ç=Magnetic valve
Function
On version -WLE the control device TF 830/832 is replaced by DKW 972. The circuit diagrams
(Pages 22-26) are valid for both control device versions.
Function test of control box
Carry out the following checks after commissioning and each time after the burner has been serviced:
• Restart with covered up flame failure controller:
The control device must switch to fault upon expiry of the safety period.
• Burner startup with flame failure controller exposed to external light, e.g. fluorescent lamp, lighter,
incandescent lamp (daylight is not sufficient ! ):
The control device must switch over to fault during the pre-ventilation period as a consequence of the
external light.
• Normal startup - if burner is in operation during the post-ignition period black out the flame failure con-
troller:
(e.g. pull out the flame failure controller and cover it up !).
TF 830/832: the ignition must switch on and upon expiry of the safety period the device must switch
over to fault.
DKW 972: The fuel supply must be immediately interrupted and a post-ventilation of 60 secs.
must be initiated. A restart is then effected whereby the automatic firing device must go to fault posi-
tion at the end of the safety period.
• Post-ventilation after flame cutoff.
Safety and switching functions
If a flame failure occurs during operation, the fuel feed shuts off immediately and the system tries a restart,
with pre-aeration and retarded ignition. If no flame results, the control box shows a fault after the safety
time. A restart takes place in all cases following a mains power failure. The control box shows a fault if the
photoelectric cell detects a light source during the pre-aeration time, after the safety time.
The control device may only be plugged in or unplugged, if the main switch is in the "OFF" posi-
tion or if the 7-pin plug connector is disconnected, because the bottom part of the control device
carries 230 V. The incidence of external light onto the photoresistor or onto the flame failure con-
troller (e.g. through a sight glass or after-glowing refractory bricks) must be prevented. Only then
is fault-free operation of the installation ensured.
Satronic: TF 830 / 832 DKW 972
tv1 = pre-ignition time + pre-ventilation 12 secs. 20 sec.
ts= safety period 10 secs. 5 sec.
tn= post-ignition time 20 sec. 7 sec.
Post-ventilation after flame cutoff - 60 secs.
Delay after switching-off fault 90 secs. -
Photoresistor (photoelectric cell) MZ 770
Minimum photocurrent [µA] 30 30
Danfoss:
1
2
3
6
8
4
5

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Function
TF 830/832 and DKW 972
Measurement of the photocurrent
(MZ 770S only)
To measure the photocurrent the plug unit is withdrawn
from the flame failure controller and the pair of measu-
ring cables* is installed between the plug and socket
unit. The two measuring connections are connected to
the measuring instrument. If there is a negative deflec-
tion of the measuring instrument, reverse the plug on
the measuring instrument lead !
Set the measuring instrument to ampere metering for
DC, measuring range up to approx. 200 µA !
Sensible measuring accessories
Digital measuring instrument Art. no. 59-20-50 263
* Pair of measuring cables for photocurrent
Art. no. 59-20-50 4317
Air volume adjustment
Dimensions "A“ and "B“ serve as orientation aids for
easier adjustment of the air volume, which is altered in
conformity with the nozzle selection tables, depending
on the output.
Adjustment is effected via the adjusting nut (dimension
"A“) or via the adjusting screw (dimension "B“).
If there is overpressure in the furnace, set dimension
"A" lower and dimension "B" higher. If there is under-
pressure in the furnace, set dimension "A“ higher and
dimension "B“ lower than the dimensional specificati-
ons in the nozzle selection table.
The flame pattern can be influenced more favorably
with the aid of the air throttle adjuster.
The tables are for the purpose of presetting. Readjust-
ment is required in any case in relation to the installa-
tion. After adjustment of the optimal combustion
values the two lock nuts have to be tightened.
Start with flame formation
Releasing thermostat oil-preheater ON
Ventilator
Ignition
Magnetic valve
Photo-electric cell
Fault indicating lamp
tsFault
Ventilator
Ignition
Magnetic valve
Photo-electric cell
Fault indicating lamp
tv1
ts
tn
Operation
Start without flame formation
TF 830 / MMO 872
Control device
lower section
Photoelectric cell
500 µ A
or
200 µ A
Düsenstock
Luftdrossel
Verstellmutter
Düsenstock
Kontermutter
Lufteinstellung
Kontermutter
Düsenstock
Flammen-
wächter
Verstellschraube
Luftdrossel
R20
Photo-
electric cell
air throttle
air throttle
adjusting bolt
lock nut
air adjustment
lock nut
nozzle holder
nozzle holder
adjusting nut
nozzle holder
measure A
measure B

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Function
Servomotor
(version -Z-L, -ZS-L, 2-stage with automatic economy
device)
The air valve positioning motor adjusts the air valve
position or trips the solenoid valve on two-stage bur-
ners with air shutoff. Adjustment is via limit switch
cams on the positioning drive roller.
You can refer to the presetting table for the cam positi-
ons for adaptation of the burner to the requisite boiler
output.
For this:
Remove cover from air valve positioning motor. Alter
the cam positions via the adjusting screws with a stan-
dard screwdriver.
The switching cams can be readjusted when the bur-
ner is adjusted.
Higher setting = More air, pressure increases
Lower setting = Less air, pressure decreases
R30
R20 without preheating
R20-V-L
adjusting nut
adjusting nut
Limit stop for
baffle plate holder
scale „A“
scale „A“
measure „B“
pre-heaters air throttle lock-nut coupling nut
air throttle lock-nut coupling nut
baffle plate air throttle
1.slot behind nozzle for 45°
regulation screw
measure „B“
nozzle holder
measure“B“
lock nut
coupling nut
adjusting nut
Factory setting 45°
Limit stop adjust
with 60°
Limit stop for
baffle plate holder

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Function
Please note the following when adjusting the switch cams:
- Do not set cam position ST1 higher than ST2.
- Set cam position MV2 roughly 10°-20°above cam position ST1.
- Check cam position MV2 after correcting cam position ST1.
- After adjusting ST1 and ST2 it is necessary to switch over to the next stage so that the adjustment
becomes effective.
- After having readjusted the burner, refasten the servomotor hood and set the switch on the
lower part of the control unit to the position 2nd stage.
Version -L (single-stage with automatic economy device)
On version -L burners an air damper prevents the fur-
nace from cooling down when there is a burner
stoppage. Control of the air damper is effected electri-
cally. The air flap opens before the burner starts. Its
position can be read off the servomotor.
Position indicator "OPEN“-"CLOSED“. For servicing/
retrofitting heed circuit diagram on Pages 22-26.
Do not turn red positioning lever by hand as mecha-
nism is destructible.
Version V (with oil preheating)
The oil preheating is upline from the burner program sequence and remains in operation until the oil burner
is switched off by the control thermostat. The switch-on status of the preheater is indicated by a control
lamp in the bottom part of the control device. The cold-start disable is effected via a thermostat, which is
integrated into the preheater, and which does not enable the supply of current to the control device until the
heating-up has taken place. The electrical preheater is integrated into the nozzle holder and has a control-
led heating output. This is adapted via a posistor to the relevant heat requirement.
Version B (time meter)
Time meters are for the purpose of exact acquisition of
the burner runtime and are best connected in parallel
with solenoid valve Y6. The time meter is available as
an accessory part both directly with the burner and as
a retrofit kit.
The fuel consumption can be roughly determined with
knowledge of the hourly oil throughput. The use of
GIERSCH oil volume meters is recommended for exa-
ct determination of the fuel volume.
The values determined are for the purpose among
other things of determining the annual degree of utili-
zation. Longer burner runtimes mean a higher annual
degree of utilization.

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Function
Oil control (optional)
Measuring range: 1 to 40 l/h
Working temperature: 0-60 °C
Permissible pressure: < 25 bar
Measuring accuracy: ± 2.5 %
This multifunction unit provides information about the oil consumption, the number of burner startups, the bur-
ner operating hours etc. and in addition warns if the oil throughput drops below the preset target value
(e.g. blocked nozzle). Through early detection and elimination of the deficiency, uneconomical and environ-
mentally harmful operation of the burner can be prevented. In operation ensure that the flow, pressure and
temperature are within the permissible limits.
As a rule no special servicing of the oil control is necessary. Clean the upline dirt trap (in the pump and oil fil-
ter) when the annual burner check is performed !
Caution: The display will go out 1 day after a mains interruption, (e.g. switched phase).
However, all values are retained and can be called again when mains power is switched
back on. The set and reset functions are not possible during a mains power failure.
Method of operation of the mode key
By briefly pressing the mode key the individual displays can be called in consecutive order. The relevant mode
is displayed by a function symbol and/or the corresponding unit when the key is released.
The following functions can be displayed:
Function Display
Momentary consumption
Momentary consumption
Stage 2
2.
Oil volume
(resettable)
◊
Oil volume
(total)
S
Total operating hours
Number of
burner startups
Operating hours
Stage 2
2.
Number of
burner startups
stage 2
Reduced throughput
(see Service function)
2.
Service
000000 l
0000.00 l/h
000000 l
0000.00 l/h
000000 h
000000
000000 h
000000

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Function
Resetting the oil volume counter
Resetting of the oil volume counter can be effected in the mode ◊.:
=> Hold down the key for at least 10 secs.
Press the key, after 5 secs. the displayed value will flash for 5 secs. Subsequently the (old) value remains
on the display again, now release the key and 0L appears on the display.
Definition of the momentary consumption target value
Definition of the momentary consumption target value is effected in the mode/function momentary consump-
tion:
=> Hold down the key for at least 30 secs., but 32 secs. at the longest
Press the key, after 25 secs. the displayed momentary consumption will flash for 5 secs. As soon as the
flashing stops, release the key. As confirmation the service symbol and the momentary consumption as the
newly defined target value will flash for 5 secs.
For two-stage burners the target value can be separately input in two output stages.
Following a change in burner output (nozzle change, change in pump pressure etc.) the target value, as
specified above, has to be redefined. The old target value is thereby overwritten.
Service function
If the oil flow is reduced by more than 10% (e.g. from a slowly blocking nozzle, preheater etc.), the service
symbol appears on the display unit.
The prerequisite for this service function is previous input of the target value (see Definition of the momentary
consumption target value) with correct burner operation.
Deactivation of the service function
Procedure as for definition of the momentary consumption target value, however, hold down the key for longer
than 32 secs. This clears the target value and the service symbol:
=> Hold down the key for at least 32 secs.
Upon being released the service symbol flashes and the zero value on the display flashes for 5 secs. as
confirmation.

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Startup
Startup
Adjustment tables
R20(-L)(-AE)
*Startup relief pressure 10 bar
R20-V(-L)
Burner
output
Boiler output
where
ηk = 92%
Nozzle size Nozzle spray angle Oil pump
pressure*
Oil throughput Nozzle stem
position
dimension "A“
[kW] [kW] [USgal/h] [°] [bar] [kg/h] [mm]
40 37 0.75 60°S 13 3.4 13
45 41 0.85 60°S 13 3.8 15
55 51 1.00 60°S 13 4.6 16
60 55 1.10 60°S 13 5.1 18
65 60 1.25 45°S 13 5.5 19
75 69 1.35 45°S 13 6.3 20
85 78 1.50 45°S 13 7.2 22
95 87 1.75 45°S 13 8.0 23
110 101 2.00 45°S 13 9.3 26
125 115 2.25 45°S 13 10.6 29
140 129 2.50 45°S 13 11.8 32
150 138 2.75 45°S 13 12.7 39
165 152 3.00 45°S 13 13.9 50
Burner
output
Boiler output
where
ηk = 92%
Nozzle size Nozzle spray angle Oil pump pressure Oil throughput Nozzle stem
position
dimension "A“
[kW] [kW] [USgal/h] [°] [bar] [kg/h] [mm]
35 32 0.85 60°S/45°S 9.5 3.0 14
39 36 1.00 60°S/45°S 7.0 3.4 15
46 42 1.25 45°S 8.5 4.0 17
52 48 1.50 45°S 7.0 4.5 18
59 54 1.75 45°S 7.0 5.1 19
65 60 2.00 45°S 7.5 5.6 20
72 66 2.25 45°S 7.0 6.2 21

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R20(-L)(-AE)
R20-ZS-L
R30-AE
*Startup relief pressure 12 bar
R30-Z-L
Burner output
ST2 ST1
Boiler
output
where
ηk=92%
Nozzle
size
Nozzle
spray
angle
Oil pump
pressure
ST2 ST1
Oil throughput
ST2 ST1
Nozzle
stem
position
dimen-
sion "A“
Air
throttle
position
dimen-
sion "B"
Servomotor
ST0 ST2 MV2 ST1
Compression
ST1 ST2
[kW] [kW] [USgal/h] [°] [bar] [bar] [kg/h] [kg/h] [mm] [mm] [mbar] [mbar]
49 36 45 0.75 60°S 20 10 4.2 3.0 7 - 9 15-17 0 80 10 5 3 6
56 39 52 0.85 60°S 20 10 4.8 3.3 9 - 11 16-19 0 80 15 8 3 6
66 43 61 1.00 45°S 20 10 5. 3.7 12-14 18-20 0 80 15 9 3 6
72 51 68 1.10 45°S 20 10 6.1 4.3 14 - 16 21-23 0 80 25 18 3 6
81 57.5 75 1.25 45°S 20 10 6.9 4.8 16-18 22-24 0 105 30 15 3 6
89 64 82 1.35 45°S 20 10 7.5 5.4 17-19 29-31 0 105 50 20 3 6
97 61 89 1.50 45°S 20 10 8.2 5.2 19-21 36-38 0 105 50 25 3 6
111 77 102 1.75 45°S 20 10 9.4 6.5 21-23 42-44 0 105 50 30 3 6
129 90 119 2.00 45°S 20 10 10.9 7.6 27-29 49-52 0 105 50 32 3 6
142 101 131 2.25 45°S 20 10 12.0 8.5 29-31 49-52 0 105 50 35 2.5 5
153 114 141 2.50 45°S 20 10 12.9 9.7 48-52 36-39 0 105 60 40 2.5 5
Burner
output
Boiler output
where
ηk = 92%
Nozzle size Nozzle spray
angle
Oil pump
pressure*
Oil throughput Nozzle stem
position
dimension "A“
Nozzle stem
position
dimension "B“
[kW] [kW] [gph] [°] [bar] [kg/h] [mm] [mm]
100 92 1.75 45°S 15 8.5 43 21
115 106 2.00 45°S 15 9.7 38 24
130 120 2.25 45°S 15 11.0 35 30
150 138 2.50 45°S 15 12.7 33 33
160 147 2.75 45°S 15 13.5 32 36
180 166 3.00 45°S 15 15.2 30 38
220 202 3.75 45°S 15 18.6 26 50
255 235 4.50 45°S 15 21.5 18 85
280 258 5.00 45°S 15 23.6 11 85
Burner output
ST2 ST1
Boiler
output
where
ηk=92%
Nozzle
size
Nozzle
spray
angle
Oil pump
pressure
ST2 ST1
Oil throughput
ST2 ST1
Nozzle stem
position
dimension
"A“
Air
throttle
position
dimension
"B"
Servomotor
ST0 ST2 MV2 ST1
[kW] [kW] [kW] [gph] [°] [bar] [kg/h] [mm] [mm]
143 102 132 2.25 45°S 20 10 12.0 8.6 32-36 38-40 0 115 55 45
160 113 147 2.50 45°S 20 10 13.4 9.5 30-33 42-44 0 115 60 50
176 124 162 2.75 45°S 20 10 14.8 10.4 28-31 44-46 0 115 60 50
195 138 179 3.00 45°S 20 10 16.4 11.6 25-28 43-47 0 115 65 55
217 156 200 3.50 45°S 20 10 18.2 13.1 22-25 52-56 0 115 65 55
247 179 227 4.00 45°S 20 10 20.8 15.0 14-18 59-63 0 115 75 60
273 203 254 4.50 45°S 20 10 23.0 17.1 5-7 88-92 0 115 80 65

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Design
Design
Seq. No. Designation PU Order No.
1 Retarding disc with retainer and twin electrode 1 32-90-10143
1 Diaphragm plate with retainer and twin electrode for WLE 1 47-90-21254
2 Twin electrode 5 32-50-20642
2 Twin electrode for WLE 5 33-50-10711
3 Nozzle 1 on request
4 Ignition cable 600 mm long 10 47-50-10385
4 Ignition cable 700 mm long 10 47-90-10308
4 Ignition cable 900 mm long 10 47-90-26580
5a Nozzle stem for R20 1 32-90-11509
5a Nozzle stem for R20, 100 mm long 1 47-90-26345
5a Nozzle stem for R20, 200 mm long 1 47-90-26575
5b Nozzle stem with oil preheater and cable for R20-V 1 52-90-21342
6 Impeller dia.146 x 62 mm 1 32-90-10139
7 Lower section, control box 1 31-90-22664
8 Control device TF830 1 37-90-10936
8 Control device DKW 972 for fan-assisted air heater 1 47-90-21731
9 photoelectric cell MZ 770S 1 47-90-21037
10 Burner cover 1 32-90-11742
11 Safety switch 1 32-90-11499
12 Motor 230 V / 50 Hz 180 W with cable 1 32-90-11507
13 Coupling for motor 10 37-50-11586
14 Solenoid valve coil for oil pump Danfoss BFP 1 57-90-10919
14 Solenoid valve coil for oil pump Suntec AS 1 47-90-21524
15 Oil pump Danfoss BFP 21 LG with connection parts 1 47-90-10834
15 Oil pump Suntec AS 47D with connection parts for R20-V-L 1 47-90-12644
16 Gasket 13 x 18 x 2 50 37-50-11293
17 Hose stem R1/4 x 6 LL 10 47-50-20862
18 Oil hose NW4 1200 mm long 1 47-90-10802
19 Gasket 10 x 14 x 2 50 37-50-10788
20 Pressure pipe stem dia. 1/8 5 37-50-20200
21 Pressure pipe for oil pump - nozzle stem 1 31-90-23246
21 Pressure pipe for oil pump - nozzle stem, 200 mm long 1 32-90-11693
22 Ignition transformer 2 x 5 kV / 20 mA with cable 1 47-90-20777
23 Positioning drive SA2-F with cable 1 57-90-11592
24 Plug unit, 7-pin, black/brown 5 37-50-11015
25 Socket unit 7-pin black/brown with cable 5 47-50-11839
26 Air flap for R20-L and R20-V-L 5 32-50-11595
27 Plastic housing insert 1 32-90-11744
28 Housing with burner pipe 1 32-90-11508
28 Housing with burner pipe 100 mm long 1 47-90-26343
28 Housing with burner pipe 200 mm long 1 47-90-26577
29 Fastening unit 10 32-50-11646
30 Sliding flange 1 32-90-10136
31 Flange gasket 5 32-50-10261
12
345b
5a
6
789
10
1112 13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
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31
R20(-V)(-L)

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E.04.2000 • G. 15.10.07
Design
R20(-L)(-AE)
Seq. No. Designation PU Order No.
1a Retarding disc with retainer and twin electrode 1 32-90-10143
1b Diaphragm plate with twin electrode for fan-assisted air heater 1 47-90-21254
2 Twin electrode 1 32-50-20642
2 Twin electrode for WLE 5 33-50-10711
3 Nozzle 1 on request
4 Ignition cable 600 mm long 10 47-50-10385
5 Nozzle stem 1 32-90-11509
6 Impeller dia.146 x 62 mm 1 32-90-10139
7 Lower section, control box 1 31-90-22664
8 Control device TF832 1 37-90-10955
8 Control device DKW 972 for fan-assisted air heater 1 47-90-21731
9 photoelectric cell MZ 770S 1 47-90-21037
10 Burner cover 1 32-90-11742
11 Safety switch 1 32-90-11499
12 Motor 230 V / 50 Hz - 180 W with cable 1 32-90-11507
13 Coupling for motor 10 37-50-11586
14 Solenoid valve for oil pump Suntec AT 2/3 1 47-90-22048
15 Oil pump Suntec AT 245 with connection parts 1 47-90-12645
16 Gasket 13 x 18 x 2 50 37-50-11293
17 Hose stem ND 6 dia.1/4 10 37-50-11348
18 Oil hose ND6 1200 mm long 1 47-90-11347
19 Gasket 10 x 14 x 2 50 37-50-10788
20 Pressure pipe stem dia. 1/8 5 37-50-20200
21 Pressure pipe dia. 20 f. oil pump Suntec- nozzle stem 1 31-90-23246
22 Ignition transformer 2 x 5 kV / 20 mA with cable 1 47-90-20777
23 Positioning drive SA2-F with cable 1 57-90-11592
24 Plug unit, 7-pin, black/brown 5 37-50-11015
25 Socket unit 7-pin black/brown with cable 5 47-50-11839
26 Air flap (for R20-L) 5 32-50-11595
27 Plastic housing insert 1 32-90-11744
28 Housing with burner pipe 1 32-90-11508
29 Fastening unit 10 32-50-11646
30 Sliding flange 1 32-90-10136
31 Flange gasket 5 32-50-10261
12
34
5
6
10
789
11 12 13
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
14

17
E. 04.2000 • G. 15.10.07
Design
R20-ZS-L
Seq. No. Designation PU Order No.
1 Retarding disc with retainer and twin electrode 1 32-90-10143
1 Diaphragm plate with twin electrode (for fan-assisted air heater) 1 47-90-21254
2 Twin electrode 1 32-50-20642
2 Twin electrode for WLE 5 33-50-10711
3 Nozzle 1 on request
4 Ignition cable 700 mm long 10 47-90-10308
4 Ignition cable 900 mm long 10 47-90-26580
5 Nozzle stem 1 32-90-12650
5 Nozzle stem 100 mm long 1 47-90-26410
5 Nozzle stem 200 mm long 1 47-90-26578
6 Impeller dia.146 x 62 mm 1 32-90-10139
7 Lower section, control box 1 31-90-22664
8 Control device TF832 1 37-90-10955
8 Control device DKW 972 (for fan-assisted air heater) 1 47-90-21731
9 photoelectric cell MZ 770S 1 47-90-21037
10 Burner cover 1 32-90-11742
11 Measuring stem dia. 4 x 1 150 mm long 1 42-90-23254
12 Safety switch 1 32-90-11499
13 Motor 230 V / 50 Hz 180 W with cable 1 32-90-11507
14 Coupling for motor 10 37-50-11586
15 Solenoid valve for Oil pump Suntec AT 2/3 1 47-90-22048
16 Oil pump Suntec AT 245 with connection parts 1 47-90-12645
17 Gasket 13 x 18 x 2 50 37-50-11293
18 Hose stem ND 6 dia. 1/4" 10 37-50-11348
19 Oil hose ND 6 1200 mm long 1 47-90-11347
20 Gasket 10 x 14 x 2 50 37-50-10788
21 Pressure pipe stem dia. 1/8” 5 37-50-20200
22 Pressure pipe for oil pump -nozzle stem 1 31-90-23246
22 Pressure pipe for oil pump -nozzle stem, 200 mm long 1 32-90-11693
23 Ignition transformer 2 x 5 kV / 20 mA with cable 1 47-90-20777
24 Actuating drive STA 3.5 B0 1 47-90-24393
25 Plug unit, 7-pin, black/brown 5 37-50-11015
26 Plug unit 4-pin, black/green 5 37-50-11143
27 Socket unit 7-pin black/brown with cable 5 47-50-11243
28 Socket unit, 4-pin, green, with cable 5 47-50-11840
29 Air flap 1 32-90-10176
30 Plastic housing insert 1 32-90-11744
31 Housing with burner pipe 1 32-90-11508
31 Housing with burner pipe, 100 mm long 1 47-90-26343
31 Housing with burner pipe, 200 mm long 1 47-90-26577
32 Fastening unit 10 32-50-11646
33 Sliding flange 1 32-90-10136
34 Flange gasket 5 32-50-10261
No illu. Connection cable for STA 3.5 B0 1 47-90-22458
12
34
56
789
10
11 12
13
14
15 16 1718
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34

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E.04.2000 • G. 15.10.07
Design
R30-AE
Seq. no. Designation PU Order No.
1 Retarding disc with retainer and twin electrode 1 33-90-10708
2 Twin electrode 5 33-50-10711
3 Nozzle 1 on request
4 Ignition cable 700 mm long 1 47-90-10308
5 Nozzle stem 1 33-90-10706
6 Socket unit 7-pin black/brown 5 37-50-20731
7 Plug unit, 7-pin, black/brown 1 37-50-11015
8 Lower section, control box 1 31-90-22664
9 Control device TF832 1 37-90-10955
9 Control device DKW 972 for fan-assisted air heater 1 47-90-21731
10 photoelectric cell MZ 770S 1 47-90-21037
11 Motor 230 V / 50 Hz 250 W 1 33-90-10335
12 Coupling for motor 10 37-50-11586
13 Solenoid valve for Oil pump Suntec AT 2/3 1 47-90-22048
14 Oil pump Suntec AT245 with connection parts 1 47-90-12645
15 Gasket 13 x 18 x 2 50 37-50-11293
16 Hose stem ND 6 dia. 1/4 10 37-50-11348
17 Oil hose ND 6 1200 mm long 1 47-90-11347
18 Gasket 10 x 14 x 2 50 37-50-10788
19 Pressure pipe stem dia. 1/8 5 37-50-20200
20 Pressure pipe f. oil pump -nozzle stem 1 31-90-23246
21 Ignition transformer cpl. as spare 1 47-90-20777
22 Burner cover 1 33-90-30204
23 Impeller dia.180 x 75 mm 1 33-90-10590
24 Housing with burner pipe 1 33-90-11926
25 Intake silencer 1 33-90-12009
26 Fastening unit 10 32-50-11014
27 Sliding flange 1 33-90-10681
28 Flange gasket 5 33-50-10191
12
345
6
789
1011 12 13 14
15
16
17
18
19
20
21
22
23
24
25
26
27
28

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E. 04.2000 • G. 15.10.07
Design
R 30-Z-L
Seq. No. Designation PU Order No.
1 Retarding disc with retainer and twin electrode 1 33-90-10708
2 Twin electrode 5 33-50-10711
3 Nozzle 1 on request
4 Ignition cable 700 mm long 1 47-90-10308
5 Nozzle stem 1 33-90-10706
6 Socket unit 11-pin 1 37-90-11135
7 Plug unit 4-pin, black/green 5 37-50-11143
8 Plug unit, 7-pin, black/brown 5 37-50-11015
9 Lower section, control box 1 31-90-22664
10 Control device TF832 1 37-90-10955
10 Control device DKW 972 (for fan-assisted air heater) 1 47-90-21731
11 photoelectric cell MZ 770S 1 47-90-21037
12 Motor 230 V / 50 Hz 350 W 1 33-90-10335
13 Coupling for motor 10 37-50-11586
14 Solenoid valve for Oil pump Suntec AT 2/3 1 47-90-22048
15 Oil pump Suntec AT245 with connection parts 1 47-90-12645
16 Gasket AL 13 x 18 x 2 50 37-50-11293
17 Hose stem ND 6 dia. 1/4 10 37-50-11348
18 Oil hose ND 6 1200 mm long 1 47-90-11347
19 Gasket 10 x 14 x 2 50 37-50-10788
20 Pressure pipe stem dia. 1/8 5 37-50-20200
21 Pressure pipe for oil pump nozzle stem 1 31-90-23246
22 Ignition transformer cpl. as spare 1 47-90-20777
23 Actuating drive STA 3.5 B0 1 47-90-24393
24 Air flap 1 43-90-23298
25 Burner cover 1 33-90-30204
26 Impeller dia. 180 x 75 mm 1 33-90-10590
27 Housing with burner pipe 1 33-90-11926
28 Intake silencer 1 33-90-12009
29 Fastening unit 10 32-50-11014
30 Sliding flange 1 32-90-10681
31 Flange gasket 5 33-50-10191
No illu. Connection cable for STA 3.5 B0 1 47-90-22458
12
345
678910 1112
13 14 15
16
17
18
19
20
21
22
23
24
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26
27
28
29
30
31

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E.04.2000 • G. 15.10.07
Service instructions/dimensions
Service instructions/dimensions
Boiler/burner conditioning
Precise boiler/burner conditioning is necessary for low-emission and energy-saving combustion. For this
purpose a burner is assigned to the boiler in accordance with the working ranges (Page 28) and in consi-
deration of the resistance at the heating gas face. The insertion depth of the burner tube is optimally adju-
sted by way of the sliding flange to the relevant combustion chamber.
Smokestack connection
The prerequisite for perfect operation of the furnace is a correctly dimensioned smokestack.
Dimensioning is effected in accordance with DIN 4705 in consideration of DIN 18160 and based on the
boiler and burner outputs.
For operation on a sliding basis, provide smokestacks as per DIN 18160 part, group 1. The exhaust gas
mass flow of the total rated heat output must be put in for the calculation. The effective smokestack height
is counted from burner level. Furthermore, we refer you to the statutory building regulations of the individual
German federal states.
Select a smokestack design so that the danger of condensation or of a cold smokestack inner wall is redu-
ced to a minimum.
For exact adjustment and stabilization of the smokestack draught we recommend the in-
stallation of a draught limiter.
By this means:
• any draught fluctuations are equalized
• moisture in the smokestack is largely excluded
• stoppage losses are reduced.
Connection pieces should be introduced into the smokestack with a gradient of 30° or 45°viewed in flow
direction. It is best to provide exhaust gas pipes with thermal insulation.
Important:For the refurbishment of existing installations, over-dimensioned smokestack cross-sections or
unsuitable smokestacks are very often specified for NT operation etc. We recommend that you make an
appraisal of the smokestack system together with the responsible local chimney sweep prior to installing
the boiler plant so that suitable refurbishing measures can also be defined at an early stage for the smo-
kestack (e.g. insertion of a stainless steel pipe, centrifuging of the flue, installation of an induced draught
ventilator).
Exhaust gas thermometer
For exhaust gas temperature monitoring the heating system should be equipped with an exhaust gas ther-
mometer. The higher the exhaust gas temperature, the greater the exhaust gas loss.
Rising exhaust gas temperatures indicate increasing deposits that will reduce the degree of combustion
efficiency.
In the event of an increasing exhaust gas temperature have the heating installation cleaned and readjusted
by a skilled person.