Sunsystem BURNIT CombiBurn DC-A Series, Technical Passport, Installation And Operation Manual

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EN
TECHNICAL PASSPORT INSTALLATION and OPERATION MANUAL
1. Water supply network (pressure 6-10 bar)
2. Drainage (sewerage)
3. Boiler DC-A
4. Safety heat exchanger inlet
5. BVTS valve sensor
6. Safety heat exchanger outlet
Diagram 10. Connecting the safety heat exchanger
7.4. Connecting the boiler to the heating installation.

Such connections must be performed by a
technician / service shop authorized for such
operations.
When the boiler is connected to a heating system, it is
mandatory to install a 3 bar relief valve and expansion vessel.
No shut-off fittings may be installed between the relief valve,
expansion vessel and boiler.

It is mandatory to install a three-way valve
(Laddomat or similar) or a four-way mixing valve
which to ensure that the temperature of the
heating medium fed into the boiler from the
heating installation is at least 65°С.
Table 5. TROUBLE-SHOOTING TABLE
Installation damage
Cause Solution
1. Due to unsealed connections
1. Install the connecting piping strain-free to the boiler connections. Connect
the heating installation outlet to connection B. Connect the heating
installation inlet to connection A. Mount the cock Y included in the set
item. 11.4. at the drainage outlet.
2. Due to freezing
2. If the heating installation, including the piping network, has not been
built frost-proof, we recommend that you fill the heating installation
with a liquid which has low freezing point and corrosion protection and
antifreeze agent.
Boiler water too hot, heating bodies too cold
1. Hydraulic resistance is too high.
2. Air in the system
3. Inoperable circulation pump
Make sure the circulation pump has been properly selected and the heating
installation is of the proper dimensions. (You must contact your installer.)
The STB safety thermostat has been triggered.
Upon reaching a temperature of 95°С , the thermostatic safety protection
device is triggered and the fan is turned off. To resume protection, remove
the black cap on the front panel of the boiler and press the button on the
STB-thermostat.
Contact your installer to determine the cause of protection triggering.
Low temperature in the boiler on which the burner is installed. Unable to reach normal temperature mode of 65 ° С-85 ° С
Inadequate sizing and/or combination of
heating appliances
Immediately consult your installer about the problem. Mount the supplied
filling and drainage cock on the drainage outlet Y.
Ejection of unburned pellets into the combustion chamber of the boiler
Poor adjustment of the fuel-to-air ratio from
the burner controller
Contact your installer. It is necessary to set the burner properly using gas
analyzer
Utilization of low-quality pellets (shorter than
the specified length)
Use only fuel which meets the requirements specified in the manual.
Formation of clinkers and noncombustible inclusions inside burner body
Utilization of low-quality pellets (with higher
ash content)
Use only fuel which meets the requirements specified in the manual.
Low performance of the automatic cleaning
system
Increase turn-on frequency of the automatic cleaning system.
Improper setting of fuel-air mixture Adjust using gas analyzer
Smoke in the pellet hopper
Poor chimney draught or high internal
resistance of the boiler combustion chamber Immediately consult your installer about the problem.
Blockage of burner combustion chamber due
to build-up of noncombustible materials
It is necessary to clean the burner combustion chamber using brush
Improper setting of fuel-air mixture Adjust using gas analyzer
Unstable flame (photosensor detects >180 units at maximum output)
Blockage of burner combustion chamber due
to build-up of noncombustible materials
It is necessary to clean the burner combustion chamber using brush
Dust on the photosensor
It is necessary to clean the photosensor. Refer to the manual for the cleaning
procedure.
Improper setting of fuel-air mixture Adjust using gas analyzer
Fuel auger flooded by water from safety tank due to temperature relief valve activation.
Power failure
It is mandatory to assure a backup power generator of corresponding rated
power! /see 12.2/