MIKRO P7 - P12
20
EN
cod. 3540T988 - Rev. 01 - 01/2014
2.5 Operating instructions
Once the burner is installed and correctly adjusted, its operation is fully automatic without
requiring any control by the user. In case of anomalies or no fuel, the burner stops and
shuts down. To avoid irregular burner operation it is advisable to top-up the fuel before
it finishes.
Make sure the room where the burner is installed is free of flammable materials or ob-
jects, corrosive gases and volatile substances, and that it is not dusty. In fact, dust drawn
by the fan sticks to the blades and reduces the air flow or obstructs the flame stability
disk, affecting its efficiency.
B
Do not allow unskilled persons or children to tamper with the burner.
Max. power adjustment (parameter u02) depending on the boiler
3. INSTALLATION
3.1 General Instructions
This unit must only be used for its intended purpose.
This unit can be used with heat generators for solid fuels, compatibly with its character-
istics, performance and heating capacity. Any other use is deemed improper and there-
fore hazardous. Opening or tampering with the unit's components is not allowed (except
for the parts requiring servicing); do not modify the unit to alter its performance or intend-
ed use.
If the burner is completed with optionals, kits or accessories, only use original products.
B
BURNER INSTALLATION AND SETTING MUST ONLY BE CARRIED OUT
BY QUALIFIED AND SPECIALISED PERSONNEL, IN COMPLIANCE WITH
ALL THE INSTRUCTIONS GIVEN IN THIS TECHNICAL MANUAL, THE CUR-
RENT PROVISIONS OF LAW, THE PRESCRIPTIONS OF NATIONAL AND
LOCAL STANDARDS, AND THE RULES OF PROPER WORKMANSHIP.
3.2 Installation in boiler
Place of installation
The room where the boiler and burner are installed must have openings to the outside
as required by the current regulations. If there are several burners or exhausters that can
work together in the same room, the ventilation openings must be sized for simultaneous
operation of all the units.
The place of installation must be free of flammable materials or objects, corrosive gases,
dusts or volatile substances which, drawn by the fan, can obstruct the pipes inside the
burner or the combustion head. The room must be dry and not exposed to rain, snow or
frost.
Fix the burner to the door. Make the electrical connections as shown in cap. 5.4 (wiring
diagram). If the burner is installed in a boiler
GFG
, use the special conversion kit. Insert
the temperature probe (contained in the kit) in the sheathing on the cast-iron boiler shell
and make the respective electrical connections.
B
THE BURNER IS DESIGNED TO WORK ON HEAT GENERATORS WITH
COMBUSTION CHAMBER IN NEGATIVE PRESSURE.
THE PELLET HOPPER MUST BE POSITIONED SO THAT THE AUGER/
BURNER FLEXIBLE CONNECTION TUBE IS NOT TWISTED AND/OR BENT.
Overtemperature safety device
The heat generator must be equipped with its own protection device against overtemper-
ature. If the device provided for is a safety thermostat, it must be connected to terminals
13 and 14 of the terminal block located inside the burner (after removing the jumper). For
FER boilers not equipped with safety coil, the kit 033001X0 must be used.
fig. 6 - Safety thermostat connection
Instructions for installing the pellet burner MIKRO P7 - P12 in the boiler GFG
Optional kits are available for use of the pellet burner with boilers GFG. For installation,
refer to the instructions contained in the kits.
After installing the kit in the boiler, fit the burner.
Fix the nozzle “
L
” with screws “
M
” and the burner with nut “
N
”. Connect the cable “
E
” to
terminals 11 and 12, and the cable “
T
” to sensor “
V
”. Fix the casing "
P
” to the burner body
with screws “
R
” and part “
S
” to the burner.
fig. 7
Insert the motor-operated feed pipe “
Y
” in the pellet hopper “
X
” and carry out the auger-
burner connection so that the flexible tube “
W
” is not twisted and/or bent. Respect the
distance given in the fig. 8.
Adjust the burner as described in the relevant instruction manual and, in particular, set
the parameter u02 on the burner controller as given in the table.
fig. 8
Parameter value
MIKRO P7
Power - kW
MIKRO P12
Power - kW
1
14
30
2
20
36
3
25
41
4
30
48
5
34
55
L
N
4
5
6
7
8
9
10
11
12
13
14
3.15 A
13
14
Model
3
4
5
6
7
Nominal heating capacity
kW
24.9
33.4
41
48
55
Nominal heat output
kW
22
30
36
42
48
Parameter
u02
2
5
3
4
5
E
L
S
M
M
N
P
R
T
V
Y
W
X
min. 600
