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ATLAS D32 CONDENS K130 UNIT
4.2 Commissioning
B
Checks to be made at first lighting and after all maintenance operations that in-
volved disconnecting from the systems or an operation on safety devices or
parts of the boiler:
Before lighting the boiler
•
Open any on-off valves between the boiler and the systems.
•
Check the tightness of the fuel system.
•
Check the pre-filling of the expansion tank
•
Fill the water system and make sure that all air contained in the boiler and the sys-
tem has been vented by opening the air vent valve on the boiler and any vent valves
on the system.
•
Make sure there are no water leaks in the system, hot water circuits, connections or
boiler.
•
Make sure the electrical system is properly connected and the earth system works
properly.
•
Make sure there are no flammable liquids or materials in the immediate vicinity of
the boiler.
•
Fit the pressure gauge and the vacuum gauge on the pump (remove after starting)
of the burner.
•
open the gate valves along the diesel pipe
Lighting
A
P
B
P
fig. 35 - Startup
A
When the thermostatic line closes, the burner motor starts turning together with the
pump: all the oil sucked is sent to the return. The burner blower and the ignition trans-
former are also working, therefore the following stages are carried out:
•
firebox preventilation.
•
prewash of a part of the oil circuit.
•
preignition, with discharge between electrode tips.
B
At the end of prewash, the unit opens the electromagnetic valve: the oil reaches the noz-
zle, where it is finely sprayed.
Its contact with the discharge between the electrode tips creates the flame.
The safety time begins simultaneously.
Unit cycle
A’
A
R
SB
W
OH
OW
M
tw
Z
BV
FR
fig. 36 - Unit cycle
R-SB-W Thermostats/Pressure switches
OH
Oil preheater
OW
Operation enabling contact
M
Burner motor
Z
Ignition transformer
BV
Electromagnetic valve
FR
Photoresistance
A'
Starting with preheater
A
Starting without preheater
B
Flame presence
C
Normal operation
D
Adjustment stop (TA-TC)
VE
G
VE
G
B
C
t3n
t1
t3
TSA
t1
Preventilation time
TSA
Safety time
t3
Preignition time
t3n
Postignition time
tw
Preheating time
Unit output signals
Necessary input signals
Checks during operation
•
Ignite the appliance as described in sec. 2.3.
•
Check that the fuel circuit and water systems are airtight.
•
Check the efficiency of the flue and air-fume ducts while the boiler is working.
•
Check that the water is circulating properly between the boiler and the systems.
•
Check the proper ignition of the boiler by performing various tests, turning it on and
off with the room thermostat or remote control.
•
Check that the burner door and fume chamber are tight.
•
Check that the burner works properly.
•
Analyse the combustion (with the boiler unit stable) and check that the content of
CO
in the fumes is between 11% and 12%.
2
•
Check the parameters are programmed correctly and perform any required custom-
ization (compensation curve, power, temperatures, etc.).
4.3 Maintenance
Periodical check
To ensure proper operation of the unit, have it checked yearly by qualified personnel,
providing for the following:
•
The control and safety devices must function correctly.
•
The fume exhaust circuit must be perfectly efficient.
•
Make sure there are no obstructions or dents in the fuel supply and return pipes.
•
Clean the fuel intake line filter.
•
Check correct fuel consumption
•
Clean the combustion head in the fuel outlet zone, on the turbulence disc.
•
Leave the burner operating at max. for about ten minutes, then analyse the combus-
tion, checking:
-
Correct setting of all the elements specified in this manual
-
Fume temperatures at the flue
-
CO2 percentage content
•
The ducts must be free of obstructions and leaks
•
The burner and exchanger must be clean and free of deposits. For cleaning, do not
use chemical products.
•
The fuel and water systems must be tight.
•
The water pressure in the system when cold must be approx. 1 bar; otherwise bring
it to that value.
•
The circulating pump must not be blocked.
•
The expansion tank must be filled.
•
Check the magnesium anode and replace it if necessary.
The boiler casing, control panel and aesthetic parts can be cleaned with a soft
A
and damp cloth, if necessary soaked in soapy water. Do not use any abrasive
detergents and solvents.
Burner disassembly
•
Remove the casing (B) by undoing the screw (A), thus making all the accessories
accessible.
•
Undo the nut (C) and position the burner in order to access the nozzle.
D
1
8
3
3
6
7
4
11
12
cod. 3541G840 - Rev. 01 - 10/2016
C
fig. 37 - Burner disassembly
A
B
51
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