De Dietrich Thermique EFU 22 User manual

BE - ER15012 1 / 5 IT2656
Technical Sales
Documentation Department
TI
Technical information
Heading No 1
Fuel oil fired boilers
EFU 22 / 29 (FF) - EFU C 19 / 24 / 32
EFU C 24 /32 PLUS
Diagnostic aid - Fault finding
Product evolution
P5253 JS F 67580 Mertzwiller N° IT2656-en 27/01/2017
EN
1. Blocking of the safety control box
After 5 safety shutdowns, the safety box remains blocked at fault.
To unlock the safety box: turn off the burner power supply with the ON/
OFF button or by pulling out the burner plug.
After switching on again, reset the safety box by pressing the reset button.
The fault counting of the safety box is reset to 0, after each safety
box switching off (switching off by ON/OFF button, by unplugging
the burner or by power failure).
Troubleshooting help - Signification of the safety control box reset
button flashing:
L000836-A
Normal operating Reset button colour
Seconds
Colour code
OFF OFF
-
- -
Pre-heating time GREEN blinking
0,5
2,5
Pre-ventilation ORANGE blinking
0,5
0,5
Safety time GREEN blinking
0,5
0,5
Normal operating GREEN *
-
-
Blinking or steady ON
Fault description Reset button colour
Seconds
Colour code
Extraneous light (false flame signal) GREEN , RED blinking
alternatel
y
0,5
0,5
Frequency supply error ORANGE
-
- Steady ON
Voltage monitor error ORANGE, GREEN fast
blinkin
g
alternatel
y
0,2
0,2
Reset button fault GREEN , RED fast blinking
alternatel
y
0,2
0,2
Lockout due to no flame after ts RED
-
-Steady ON
Lockout for false flame signal RED
blinking
0,5
0,5
Lockout for maximum number of recycles RED
fast blinking
0,2
0,2
Lockout for pre-heating not finished RED blinking
0,5
2,5
Lockout for fan motor error RED, ORANGE
inverted blinking
2,5
0,5
Lockout for oil valve error RED RED, GREEN
inverted blinking
2,5
0,5
Lockout for eeprom error ORANGE, GREEN
blinking alternately
0,5
0,5
Key :
ON OFF Colour code
RED
ORANGE
GREEN
* Blinking depending on the flame signal quality : correct (1-2 blinks),
good (3-4 blinks) or excellent (5 blinks or always ON).

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2. Important recommendations for EFU C 19 boilers
In case of repeated burner defects (B33), check following points:
`Flame detection cell:
Check the presence of the supersensitive flame detection cell (including star ) to allow a better flame
detection.
The flame detection cells available in the spare parts centre under the reference 7626801, are all supersensitive
versions.
`In case of connecting an horizontal forced flue gas connection pipe (C13)
The use of DE DIETRICH connection accessories is recommended because they include a deflector limiting the
recirculation of flue gases.
The supplied deflector must imperatively be mounted.
Refer to the point 3. hereafter.
`Check the connection of the oil supply:
The oil connection must comply with the instructions delivered with the Appliance, and with point 4. hereafter.
*

BE - ER15012 3 / 5 IT2656
3. Recommendations for horizontal forced flue connection Diameter 80/
125 (C13)
The use of DE DIETRICH connection accessories is recommended because they include a deflector limiting the
recirculation of flue gases (For the majority of terminal manufacturers, the recirculation rate is high).
Combustive air inlet kit (Package MY435) + Horizontal terminal (Package FM183)
* Imperatively fit the deflector supplied in the package MY435(1)
(Deflector reference in spare part : 7640638)
* Deflector
(1) Package
MY435
L: For each additional metre of horizontal conduit,
subtract 1.2 m from the vertical length Lmax.
Markers 11, 12, 21 : Flue gas system accessories.
For details about flue gas system accessories,
refer to the relevant documentation.
C004805-C
*

BE - ER15012 4 / 5 IT2656
4. Important recommendations for fuel connection
The presence of air in the fuel oil can lead to improper start-up and fouling of the burner combustion
head. It is therefore necessary to be sure there is no air in the fuel oil.
If a single-tube oil filter is used, it is imperative to use a single-tube filter including a deaerator (type Flocotop package
MT11 Ref. 100019100), in order to remove any air in the fuel.
In case of use of a single-tube oil filter, it is important to respect the sections recommended below because these
sections are smaller than for a conventional filter.
Failure to comply with the recommended sections will prevent air from escaping from the pipeline.
Maximum suction line length with lower tank level:
If the suction line is designed as a self-securing suction line according to the applicable technical regulations, remove
all check valves upstream of the Flocotop filter.
Maximum suction line length for an installation below the tank level:
An anti-siphon valve should be installed to prevent fuel oil from escaping in the case of a defective suction line since
the oil level in the tank is higher.
Boiler type EFU C 19 ... EFU C 24 (PLUS) ... EFU C 32 (PLUS) ... EFU 22 ... EFU 29 ...
Burner type RDB 2.2(1) RDB 2.2 RDB 2.2 RDB 2.2 RDB 2.2
Fuel flow (Kg/h) 1,60 2,02 2,70 2,02 2,69
(1) with preheater (18 W)
Nozzle flow Inner pipe
diameter
H
Suction height (m)
1,5 2,0 2,5 3,0 3,5 4,0
< 2,5 Kg/h
(3 l/h)
Ø 4 mm 32 26 19 13 7 1
Ø 6 mm >100 >100 >100 68 36 4
Ø 8 mm >100 >100 >100 >100 >100 14
< 5 Kg/h
(6 l/h)
Ø4mm 1086421
Ø 6 mm 81 65 49 34 18 2
Ø 8 mm >100 >100 >100 >100 57 7
Nozzle
flow
Inner pipe
diameter
H / HKAV / HMAV
Suction height (m)
1,5 2,0 2,5 3,0 3,5 4,0
< 2,5 Kg/h
(3 l/h)
Ø 4 mm 32 26 19 13 7 1
< 5 Kg/h
(6 l/h) Ø4mm 1086421
1 KAV : Piston type anti-siphon valve
2 MAV : Diaphragm type anti-siphon valve
HKAV Relevant suction height with piston type anti-siphon valve KAV
HMAV Relevant suction height with diaphragm type anti-siphon valve MAV
Maximum possible
suction line length (m)
Maximum possible
suction line length (m)

BE - ER15012 5 / 5 IT2656
5. New flame detection cell
A new supersensitive flame detection cell (marked with an asterisk ) equip all burner versions of the EFU... boiler
range, since August 30 * 4 - from burner serial number 01356073191.
The flame detection cells available in the spare parts centre under the reference 7626801, are all supersensitive
versions.
*