Systema K21 User manual

INSTRUCTION MANUAL
“INSTALLATION, USE AND MAINTENANCE”
GREAT BRITAIN
AIRTIGHT GAS CONVECTORS
Pilot flame thermocouple series, natural balanced mod.K21, K28, K40, K55
Ventilated pilot flame thermocouple series, natural balanced mod.K28V, K40V, K55V
Electronic series, natural balanced mod.K21E, K28E,
K40E, K55E
Ventilated electronic series, natural balanced mod.K28VE, K40VE, K55VE
Ventilated/forced circulation series mod.K21FE, K28FE, K40FE,
K55FE

2
Rev. 12GB0712
SYSTEMA S.p.A. AIRTIGHT GAS CONVECTORS
IMPORTANT: Read this manual carefully before starting up the system. In order to improve the product,
Systema reserves the right to modify the content without prior notice.
Via San Martino 17/23
S. GIUSTINA IN COLLE (PD)
loc. Fratte Fontane Bianche
PADOVA - ITALY
Tel [phone]
(8 linee r.a.)
Fax [phone]
E-mail: [email protected]
technical informations
http://www.systema.it
commercial informations

3Rev. 12GB0712
SYSTEMA S.p.A.
AIRTIGHT GAS CONVECTORS
1 GENERAL RULES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
2 GENERAL TECHNICAL CHARACTERISTICS . . . . . . . . . . . . . . . . . . . . . .5
2.1 Device classification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
2.2 Packing list and check on incoming material . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
2.3 Description and operational characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
2.4 Principal elements of the control and safety systems . . . . . . . . . . . . . . . . . . . . . . .6
2.5 Pilot flame series technical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
2.6 Electronic series technical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
2.7 Overall dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
2.8 Exploded view of convector with parts list . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
2.9 Device wiring diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
3 INSTRUCTIONS FOR INSTALLERS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20
3.1 Technical Reference Standards and Legislation . . . . . . . . . . . . . . . . . . . . . . . . . . . .20
3.2 Places of installation and safety distances . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20
3.3 Device installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21
3.4 Gas line connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25
3.5 Transformations for various types of gas supplies for pilot flame-type devices (Mod.
K21, K28, K40, K55, K28V, K40V, K55V) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26
3.7 Transformations for various types of gas supplies for electronic devices (Mod. K21E,
K28E, K40E, K55E, K28VE, K40VE, K55VE, K21FE, K28FE, K40FE, K55FE) . . . . .27
3.8 Electrical connections from the control panels to the devices . . . . . . . . . . . . . . . .28
3.9 Starting and operation of pilot flame devices (Mod. K21, K28, K40, K55, K28V, K40V,
K55V) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28
3.10 Starting and operation of electronic devices (Mod. K21E, K28E, K40E, K55E, K28VE,
K40VE, K55VE, K21FE, K28FE, K40FE, K55FE) . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28
3.11 Utilization of the daily programmer (optional) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .29
3.12 Utilization of the weekly programmer (optional) . . . . . . . . . . . . . . . . . . . . . . . . . . . .29
3.13 Malfunctions and solutions for pilot flame devices (Mod. K21, K28, K40, K55, K28V,
K40V, K55V) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30
3.14 Malfunctions and solutions for electronic devices (Mod. K21E, K28E, K40E, K55E,
K28VE, K40VE, K55VE, K21FE, K28FE, K40FE, K55FE) . . . . . . . . . . . . . . . . . . . . . .31
4 INSTRUCTIONS FOR THE USER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .32
4.1 General rules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .32
4.2 Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .32
4.2.1 Object and duration of the guarantee . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .32
4.2.2 Exclusions from the guarantee . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .32
4.2.3 Competence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .33
4.2.4 Operativity and effectiveness of the guarantee . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .33

4
Rev. 12GB0712
SYSTEMA S.p.A. AIRTIGHT GAS CONVECTORS
4.2.5 Responsibility . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .33
4.2.6 Legal disputes - Territorial competence and rights of the parties . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .33
5 PUTTING THE DEVICE OUT OF USE . . . . . . . . . . . . . . . . . . . . . . . . . . . . .33
6 SCRAPPING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .33
7 CE CONFORMITY CERTIFICATE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .35

5Rev. 12GB0712
SYSTEMA S.p.A.
AIRTIGHT GAS CONVECTORS
1 GENERAL RULES
This Manual is an integral and essential part of this devi-
ce and must be carefully stored in its vicinity for purpo-
ses of rapid consultation.
Read the instructions and warnings provided herein
carefully because they provide important information
regarding safety, installation, use and maintenance.
Installation must be performed exclusively by qualified
professional personnel in complete respect of the safety
regulations in force. The Manufacturer declines all liabi-
lity for damages caused by the erroneous installation or
incorrect and/or inappropriate use of the device.
Keep all potentially dangerous packaging elements
(nylon, polystyrene foam, wood, staples, etc.) far from
the reach of children.
The device must be started for the first time by qualified
personnel only.
Immediately switch off the device whenever it stops
and/or malfunctions. All repairs must be performed by
qualified personnel using original spare parts only.
Failure to observe the above can compromise operatio-
nal safety.
Scrupulously respect the indications provided by the
Manufacture to guarantee satisfactory operation.
Never leave clothes, paper or other objects that might
obstruct the passage of hot air from the slots on top of
the radiator.
Delicate surfaces such as curtains, furniture, and woo-
den or plastic chairs must be kept at a minimum distan-
ce of 30 cm from the device.
Provide extra protection against the risk of burning by
contact of children, the elderly or disabled with the hot
surfaces of the shell wherever necessary. Such additio-
nal protection must not obstruct the passage of hot air
and the irradiation of heat from the front panel.
2 GENERAL TECHNICAL CHARACTERISTICS
2.1 Device classification
Device type: Type C11 (natural draught) and C13 (for-
ced draught) depending on the flue gas suction and
expulsion system used.
Device output class: 1
2.2 Packing list and check on
incoming material
a) The device is delivered complete with all its parts in
a box that also contains a set of wall attachment
screws.
b) The air/flue gas terminals and the grille are packed
separately.

6
Rev. 12GB0712
SYSTEMA S.p.A. AIRTIGHT GAS CONVECTORS
CONVECTOR FLUE GAS-AIR KIT
Draw 1 Package contents
2.3 Description and operational
characteristics
The airtight gas convector radiator is composed of a
combustion chamber for the combustion of a gaseous
component (methane or LPG) in airtight cast iron divi-
ded into two half-shells that can be opened for cleaning
and the inspection of the burner. The working tempera-
ture of the external surface of the combustion chamber
as fanned by the natural convection movement of the
surrounding air or the forced circulation of the fans is
usually reached in a few minutes.
The device functions automatically, and is equipped with
the appropriate systems for safety, control, mixing, com-
bustion, starting, the suction of combustion air and flue
gas expulsion.
The combustion air suction and flue gas expulsion
systems must be mandatorily connected directly to the
building’s exterior (C-type devices) and therefore there
is no contact between the combustion chamber and the
building’s interior. This guarantees the maximum safety
and permits the installation of the device indoors in com-
plete respect of the standards in force.
2.4 Principal elements of the con-
trol and safety systems
a) Electric control unit for the Electronic series
models: this can be of two types depending on the
convector model involved (forced or naturally
balanced circulation). After receiving the electric
signal from the room thermostat, the control unit
runs a normal check on the pressure-switch when
forced convectors are being controlled (if this check
is not positive, the control unit does not grant trig-
gering). The control unit then gives the signal for
the performance of the pre-starting lubrication of
the combustion chamber (>4 lubrications) and then
the signal for spark ignition and starting by opening
the gas solenoid valve. If no flame is detected (by
the ionization probe) within the established safety
time, the device goes into lock-out. In order to reset
after lock-out, switch off the bipolar switch with the
orange l.e.d. and then switch it back on again.

7Rev. 12GB0712
SYSTEMA S.p.A.
AIRTIGHT GAS CONVECTORS
CONTROL UNIT TECHNICAL CHARACTERISTICS
Power supply voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .220/240 V 50/60Hz
Work temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .-20 ÷ 60°C
Pre-starting lubrication time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10 s
Starting safety time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .max. 5 s
Switch-off safety time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .< 1 s
b) Pilot gas valve: there is only one type of pilot gas
valve for all pilot flame convector models - a multi-
functional valve with single control and combined
manual all-or-nothing thermostat control equipped
with thermoelectric flame detection device with
reset inhibition, maximum flowrate pre-selection
device or pressure regulator, minimum flowrate pre-
selection screw, all-or-nothing modulation thermo-
stat, pilot flame output with gas flowrate pre-selec-
tion screw, inlet filter and pilot filter, inlet and outlet
pressure taps - lateral gas outlets or gas outlets
from below with RP 3/8 ISO 7 threads. To start,
press the dial and switch on the pilot flame by kee-
ping the dial pressed down for a few seconds. Then
release the dial and check to make sure that the
pilot flame remains on. If the pilot flame has gone
out in the meantime, the reset inhibition device will
prevent the re-starting of the convector until the
established pilot flame detection device safety time
has elapsed.
PILOT GAS VALVE TECHNICAL DATA
Gas connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .RP 3/8 ISO 7
Max. inlet pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .50 mbar
Pressure setting range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3 ÷ 18 mbar
Room temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .0° ÷ 80°C
Pressure regulator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .CLASS C
Pilot flame detection device . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Sit series 200 or 290 thermocouple
Starting time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .< 10 s
Switch off time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .< 60 s
c) Gas solenoid valve: for all electronic series and for-
ced ventilation convectors, multifunctional and mul-
tigas with a double safety solenoid valve (connec-
ted in series) in Class A and a built-in rectifier brid-
ge. The aluminum body holds the inlet gas connec-
tions - threaded G 3/8" outlet with respective pres-
sure taps. Equipped with pressure regulator to be
adjusted only by qualified technicians, the only
maintenance operation possible on the valve.
GAS VALVE TECHNICAL DATA
Power supply voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .220/240 VAC 50/60 Hz
Electrical protection rating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .IP40
Closing time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .01 s
Work temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .-20 ÷ +60°C
Max. inlet pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .100 mbar
Work pressure range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .0 ÷ 100 mb
Gas flow rate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1,5 m3/h (Natural gas DP = 2,5 mb)
d) Air suction unit: this serves to suck the air from the
outside and inject it into the combustion chamber
with the consequent expulsion of the flue gases
outwards through the appropriate flue gas duct.
SUCTION UNIT MOTOR RATING PLATE DATA
Electrical power supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .230 VAC 50 Hz
Insulation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .CLASS H
Motor pack . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .da 30 mm
Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20 WATT

8
Rev. 12GB0712
SYSTEMA S.p.A. AIRTIGHT GAS CONVECTORS
2.5 Pilot flame series technical
characteristics
THERMOSTAT CHARACTERISTICS
Electrical power supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .240 V 20 A
Work range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6° ÷ 30°C
Max. bulb temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .42°C
Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .copper
Bulb . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .copper
f) Daily or weekly programmer (only on request): this
serves to program the device’s daily and weekly
operation cycles and is positioned on the control
e) Adjustment thermostat: this is a sensor-type ther-
mostat that permits the temperature to be adjusted
as required by the user for a comfortable room tem-
perature, and also permits the control of the starting
and switching off of the device from the control unit.
panel for access by the user for adjustment purpo-
ses.
TECHNICAL SPECIFICATIONS OF AIRTIGHT GAS CONVECTORS
PILOT FLAME THERMOCOUPLE SERIES MODELS
NON-VENTILATED VENTILATED
K21 K28 K40 K55 K28V K40V K55V
RATED HEAT FLOW
kW 2 2,5 4 4,6 2,5 4 4,6
kcal/h 1720 2150 3440 3960 2150 3440 3960
WORKING HEAT OUTPUT
kW 1,8 2,2 3,5 4,1 2,2 3,6 4,1
kcal/h 1550 1900 3010 3530 1900 3100 3530
COMBUSTION EFFICIENCY % 90,0 87,0 87,3 87,5 87,5 88,0 88,0
CATEGORY EFFICIENCY 1 1 1 1 1 1 1
INJECTOR PRESSURE
(power supply=20mbar)
Methane G20 mbar 13,2 12,0 12,5 14,0 12,0 12,5 14,0
INJECTOR PRESSURE
(power supply=25mbar)
Gas L - G25 mbar -
INJECTOR PRESSURE
(power supply=29mbar)
GPL Butane - G30 mbar 28.9 28.8 28.9 29.0 28.8 28.9 29.0
INJECTOR PRESSURE
(power supply=37mbar)
GPL Propane - G31 mbar 36.6 36.8 36.7 36.5 36.6 36.7 36.5
BURNER INJECTOR DIA-
METER
Methane G20 mm 1,25 1,45 1,90 1,90 1,45 1,90 1,90
Gas L - G25 mm 1.25 1.45 1.90 1.90 1.45 1.90 1.90
GPL Butane - G30 mm 0.75 0.85 1.05 1.10 0.85 1.05 1.10
GPL Propane - G31 mm 0,75 0,85 1,05 1,10 0,85 1,05 1,10
MAX FUEL
CONSUMPTION
(0°C - 1013 mbar)
Methane G20 m30,21 0,26 0,42 0,49 0,26 0,42 0,49
Gas L - G25 m30.25 0.31 0.49 0.57 0.31 0.49 0.57
GPL Butane - G30 kg/h 0.158 0.197 0.315 0.363 0.197 0.315 0.363
GPL Propane - G31 kg/h 0,155 0,194 0,311 0,357 0,194 0,311 0,357
ELECTRICAL POWER SUPPLY
V -- -- -- -- 230 230 230
Hz -- -- -- -- 50 50 50
ELECTRICAL POWER (absorbed) W -- -- -- -- 25 30 30
TREATED AMBIENT AIR FLOW m3/h -- -- -- -- 150 240 270
HEATED AMBIENT VOLUME m336 44 70 82 48 78 88
FAN SPEED NUMBER -- -- -- -- 2 2 2
OVERALL DIMENSIONS
Width mm 420 420 560 560 420 560 560
Height mm 615 615 615 615 615 615 615
Depth mm 225 225 225 225 225 225 225
WEIGHT kg 31 31 45 45 32 46 46
GAS FITTING DIAMETER inc. (”) 1/2"- M 1/2"- M 1/2"- M 1/2"- M 1/2"- M 1/2"- M 1/2"- M
AIR-FUME COAXIAL
PIPE DIAMETERS
Air mm 120 120 160 160 120 160 160
Fumes mm 90 90 90 90 90 90 90
AIR-FUME MAX LENGHT coaxial pipes mm 500 500 500 500 500 500 500
TYPE OF EQUIPMENT C11

9Rev. 12GB0712
SYSTEMA S.p.A.
AIRTIGHT GAS CONVECTORS
2.6 Electronic series technical
characteristics
(*) N.B. One meter of length must be removed for every elbow used in forced ventilation electronic models (FE).
Categories
AT . . . . . . . . . . . . . . . . . . . . . . . . . .II2H3B/P
DE . . . . . . . . . . . . . . . . . . . . . . . . . .II2ELL3B/P
FI . . . . . . . . . . . . . . . . . . . . . . . . . . .II2H3B/P
GR . . . . . . . . . . . . . . . . . . . . . . . . . .II2H3P
IT . . . . . . . . . . . . . . . . . . . . . . . . . . .II2H3+
NO . . . . . . . . . . . . . . . . . . . . . . . . . .II2H3B/P
BE . . . . . . . . . . . . . . . . . . . . . . . . . . .I2E+ / I3+
DK . . . . . . . . . . . . . . . . . . . . . . . . . .II2H3B/P
FR . . . . . . . . . . . . . . . . . . . . . . . . . .II2E+3+
IE . . . . . . . . . . . . . . . . . . . . . . . . . . .II2H3P
LU . . . . . . . . . . . . . . . . . . . . . . . . . .II2E3P
PT . . . . . . . . . . . . . . . . . . . . . . . . . .II2H3P
CH . . . . . . . . . . . . . . . . . . . . . . . . . .II2H3B/P
ES . . . . . . . . . . . . . . . . . . . . . . . . . .II2H3P
GB . . . . . . . . . . . . . . . . . . . . . . . . . .II2H3P
NL . . . . . . . . . . . . . . . . . . . . . . . . . .II2L3B/P
SE . . . . . . . . . . . . . . . . . . . . . . . . . .II2H3B/P
IS . . . . . . . . . . . . . . . . . . . . . . . . . . .I3B/P
TECHNICAL SPECIFICATIONS OF AIRTIGHT GAS CONVECTORS
ELECTRONONIC SERIES MODELS
NON-VENTILATED VENTILATED NON-VENTILATED
K21E K28E K40E K55E K28VE K40VE K55VE K21FE K28FE K40FE K55FE
RATED HEAT FLOW
kW 2 2,5 4 4,6 2,5 4 4,6 2,4 3 4,3 5,3
kcal/h 1720 2150 3440 3960 2150 3440 3960 2070 2580 3700 4560
WORKING HEAT OUTPUT
kW 1,8 2,3 3,6 4,1 2,3 3,6 4,1 2,2 2,7 3,8 4,6
kcal/h 1550 1980 3100 3530 1980 3100 3530 1900 2330 3270 3960
COMBUSTION EFFICIENCY % 89,8 90,0 88,0 88,0 90,0 88,0 88,0 88,5 88,0 88,3 85,0
CATEGORY EFFICIENCY 11111111111
INJECTOR PRESSURE
(power supply=20mbar) Methane G20
mbar 14,0 12,0 11,0 13,5 12,0 11,0 13,5 12,0 13,0 12,0 12,0
INJECTOR PRESSURE
(power supply=25mbar) Gas L - G25
mbar 13,5 12,5 11,0 10,0 12,5 11,0 10,0 12,0 13,0 12,0 12,0
INJECTOR PRESSURE
(power supply=29mbar) GPL Butane - G30
mbar 28,5 28,5 28,0 29,0 28,5 28,0 29,0 28,5 28,5 28,4 28,6
INJECTOR PRESSURE
(power supply=37mbar) GPL Propane - G31
mbar 36,5 37,0 35,5 37,0 37,0 35,5 37,0 36,5 36,5 36,4 36,4
BURNER INJECTOR DIA-
METER
Methane G20 mm 0,75 0,85 1 1,1 0,85 1 1,1 0,82 0,9 1,05 1,15
Gas L - G25 mm 1,5 1,6 2,1 2,3 1,6 2,1 2,3 1,5 1,7 2,1 2,4
GPL Butane - G30 mm 0,75 0,85 1 1,1 0,85 1 1,1 0,82 0,9 1,05 1,15
GPL Propane - G31 mm 1,25 1,45 1,9 1,9 1,45 1,9 1,9 1,4 1,6 1,9 2,1
MAX FUEL
CONSUMPTION
(0°C - 1013 mbar)
Methane G20 m3 0,21 0,26 0,42 0,49 0,26 0,42 0,49 0,25 0,32 0,46 0,56
Gas L - G25 m3 0,25 0,31 0,49 0,57 0,31 0,49 0,57 0,30 0,37 0,53 0,65
GPL Butane - G30 kg/h 0,158 0,197 0,315 0,363 0,197 0,315 0,363 0,189 0,237 0,339 0,418
GPL Propane - G31 kg/h 0,155 0,194 0,311 0,357 0,194 0,311 0,357 0,186 0,233 0,334 0,412
ELECTRICAL POWER SUPPLY
V 230 230 230 230 230 230 230 230 230 230 230
Hz 50 50 50 50 50 50 50 50 50 50 50
ELECTRICAL POWER (absorbed) W 20 20 20 20 45 65 65 65 65 85 85
TREATED AMBIENT AIR FLOW m3/h -- -- -- -- 150 240 270 150 180 260 310
HEATED AMBIENT VOLUME m3 36 46 72 82 50 78 88 48 58 84 102
FAN SPEED NUMBER -- -- -- -- 2 2 2 2 2 2 2
OVERALL DIMENSIONS
Width mm 420 420 560 560 420 560 560 560 560 730 730
Height mm 615 615 615 615 615 615 615 615 615 615 615
Depth mm 225 225 225 225 225 225 225 225 225 225 225
WEIGHT kg 32 32 46 46 32 46 46 32 33 52 52
GAS FITTING DIAMETER inc. (”) 3/8"- F 3/8"- F 3/8"- F 3/8"- F 3/8"- F 3/8"- F 3/8"- F 3/8"- F 3/8"- F 3/8"- F 3/8"- F
AIR-FUME COAXIAL PIPE
DIAMETERS
Air mm 120 120 160 160 120 160 160 60 60 60 60
Fumes mm 90 90 90 90 90 90 90 38 38 38 38
AIR-FUME MAX LENGHT coaxial pipes mm 500 500 500 500 500 500 500 5000 5000 5000 3000
TYPE OF EQUIPMENT C11 C13

10
Rev. 12GB0712
SYSTEMA S.p.A. AIRTIGHT GAS CONVECTORS
Draw2
2.7 Overall dimensions
GAS CONNECTION 10 cm
min.
ATTENTION: the KING gas convector must be installed at 10 cm minimum distance from the ground; it
is necessary to forsee the space for the gas interception. The hole for the gas pipe has to be provided
under the appliance, between the appliance and the ground, according to the gas inlet of the appliance
itself.
CONVECTOR OVERALL DIMENSIONS AND ASSEMBLY FRAME
MODELS A B C D E F G H I
K21
440 624 225 385 611 173 212 125 116
K28 440 624 225 385 611 173 212 125 116
K40
600 624 225 549 611 264 285 160 124
K55 600 624 225 549 611 264 285 160 124
K28V
440 624 225 385 611 173 212 125 117
K40V
600 624 225 549 611 264 285 160 124
K55V 600 624 225 549 611 264 285 160 124
K21E
440 624 225 385 611 173 212 125 117
K28E 440 624 225 385 611 173 212 125 117
K40E
600 624 225 549 611 264 285 160 124
K55E 600 624 225 549 611 264 285 160 124
K28VE
440 624 225 385 611 173 212 125 117
K40VE
600 624 225 549 611 264 285 160 124
K55VE 600 624 225 549 611 264 285 160 124
K21FE
585 616 225 535 612 305 230 60 108
K28FE 585 616 225 535 612 305 230 60 108
K40FE
745 616 225 689 612 399 290 60 108
K55FE 745 616 225 689 612 399 290 60 108
The data provided above are purely indicative. The Manufacturer reserves the right to perform modifications without notice.

11 Rev. 12GB0712
SYSTEMA S.p.A.
AIRTIGHT GAS CONVECTORS
2.8 Exploded view of convector
with parts list
Draw 3 Exploded view of Model K21, K28, K40, K55 generator
PILOT FLAME TYPE THERMOCOUPLE SERIES CONVECTOR (Ref. Draw 3)
POS. Q. ITEM K21 K28 K40 K55
CODE CODE CODE CODE
1 1 PAIR OF COAXIAL TUBES 02ACKT0808 02ACKT0808 02ACKT0810 02ACKT0810
2 1 AIR BOX 02CNSA0378 02CNSA0378 02CNSA0379 02CNSA0379
3 1 EUROSIT PILOT FLAME VALVE 02CNVE0679 02CNVE0679 02CNVE0679 02CNVE0679
4 1 REAR CAST IRON CASTING 02CNFU0201 02CNFU0201 02CNFU0203 02CNFU0203
5 1 BURNER 02CNBR0050 02CNBR0050 02CNBR0052 02CNBR0051
6 1 FRONT CAST IRON CASTING 02CNFU0200 02CNFU0200 02CNFU0202 02CNFU0202
7 1 SHELL 02MACO0028 02MACO0028 02MACO0029 02MACO0029

12
Rev. 12GB0712
SYSTEMA S.p.A. AIRTIGHT GAS CONVECTORS
Draw 4 Exploded view of Model K28V, K40V, K55V generator
VENTILATED PILOT FLAME THERMOCOUPLE SERIES CONVECTORS (Ref. Draw 4)
POS. Q. ITEM K28V K40V K55V
CODE CODE CODE
1 1 PAIR OF COAXIAL TUBES 02ACKT0808 02ACKT0810 02ACKT0810
2 1 FAN TRIGGERING THERMOSTAT 02CETR0470 02CETR0470 02CETR0470
3 1 AIR BOX 02CNSA0378 02CNSA0379 02CNSA0379
4 1 EUROSIT PILOT FLAME VALVE 02CNVE0679 02CNVE0679 02CNVE0679
5 1 MOLVENO I-II SWITCH 02CEDE0234 02CEDE0234 02CEDE0234
6 1 TANGENTIAL FAN 02CEVT0622 02CEVT0623 02CEVT0623
7 1 REAR CAST IRON CASTING 02CNFU0201 02CNFU0203 02CNFU0203
8 1 BURNER 02CNBR0050 02CNBR0052 02CNBR0051
9 1 FRONT CAST IRON CASTING 02CNFU0200 02CNFU0202 02CNFU0202
10 1 SHELL 02MACO0028 02MACO0029 02MACO0029

13 Rev. 12GB0712
SYSTEMA S.p.A.
AIRTIGHT GAS CONVECTORS
Draw 5 Exploded view of Model K21E, K28E, K40E, K55E generator
ELECTRONIC SERIES CONVECTORS (Ref. Draw 5)
POS. Q. ITEM K21E K28E K40E K55E
CODICE CODICE CODICE CODICE
1 1 PAIR OF COAXIAL TUBES 02ACKT0808 02ACKT0808 02ACKT0810 02ACKT0810
2 1 LIMIT THERMOSTAT 02CETR0471 02CETR0471 02CETR0471 02CETR0471
3 1 AIR BOX 02CNSA0378 02CNSA0378 02CNSA0379 02CNSA0379
4 1 BRAHMA CM11F DEVICE 02CEAP2701 02CEAP2701 02CEAP2701 02CEAP2701
IMIT AC02 DEVICE 02CEAP1028 02CEAP1028 02CEAP1028 02CEAP1028
5 1 ELECTRIC CONTROL PANEL KING E 02CEQU0345 02CEQU0345 02CEQU0345 02CEQU0345
6 1 WHITE ROGERS ELECTRONIC VALVE 02CEEC0164 02CEEC0164 02CEEC0164 02CEEC0164
SIT 850 MICRO ELECTRONIC VALVE 02CEEL0166 02CEEL0166 02CEEL0166 02CEEL0166
7 1 REAR CAST IRON CASTING 02CNFU0201 02CNFU0201 02CNFU0203 02CNFU0203
8 1 BURNER 02CNBR0058 02CNBR0050 02CNBR0051 02CNBR0051
9 1 FRONT CAST IRON CASTING 02CNFU0200 02CNFU0200 02CNFU0202 02CNFU0202
10 1 SHELL 02MACO0028 02MACO0028 02MACO0029 02MACO0029

14
Rev. 12GB0712
SYSTEMA S.p.A. AIRTIGHT GAS CONVECTORS
Draw 6 Exploded view of Model 28VE, K40VE, K55VE generator
VENTILATED ELECTRONIC SERIES CONVECTORS (Ref. Draw 6)
POS. Q. ITEM K28VE K40VE K55VE
CODE CODE CODE
1 1 PAIR OF COAXIAL TUBES 02ACKT0808 02ACKT0810 02ACKT0810
2 1 LIMIT THERMOSTAT 02CETR0471 02CETR0471 02CETR0471
3 1 FAN TRIGGERING THERMOSTAT 02CETR0470 02CETR0470 02CETR0470
4 1 AIR BOX 02CNSA0378 02CNSA0379 02CNSA0379
5 1 BRAHMA CM11F DEVICE 02CEAP2701 02CEAP2701 02CEAP2701
IMIT AC02 DEVICE 02CEAP1028 02CEAP1028 02CEAP1028
6 1 ELECTRIC CONTROL PANEL KING VE 02CEQU0344 02CEQU0344 02CEQU0344
7 1 TANGENTIAL FAN 02CEVT0622 02CEVT0623 02CEVT0623
8 1 WHITE ROGERS ELECTRONIC VALVE 02CEEC0164 02CEEC0164 02CEEC0164
SIT 850 MICRO ELECTRONIC VALVE 02CEEL0166 02CEEL0166 02CEEL0166
9 1 REAR CAST IRON CASTING 02CNFU0201 02CNFU0203 02CNFU0203
10 1 BURNER 02CNBR0050 02CNBR0058 02CNBR0058
11 1FRONT CAST IRON CASTING 02CNFU0200 02CNFU0202 02CNFU0202
12 1 SHELL 02MACO0028 02MACO0029 02MACO0029

15 Rev. 12GB0712
SYSTEMA S.p.A.
AIRTIGHT GAS CONVECTORS
31
2
45
67
8910 11 12 13 14
Draw 7 Exploded view of Model K21FE, K28FE, K40FE, K50FE generator
VENTILATED/FORCED CIRCULATION SERIES CONVECTORS (Ref. Draw 7)
POS. Q. ITEM K21FE K28FE K40FE K55FE
CODE CODE CODE CODE
1 1 PAIR OF COAXIAL TUBES 02ACKT0800 02ACKT0800 02ACKT0800 02ACKT0800
2 1 STAINLESS STEEL ANTI-WIND GRILLE FOR
RECESSED WALL MOUNTING 02ACKT0801 02ACKT0801 02ACKT0801 02ACKT0801
3 1 LIMIT THERMOSTAT 02CETR0471 02CETR0471 02CETR0471 02CETR0471
4 1 FAN TRIGGERING THERMOSTAT 02CETR0470 02CETR0470 02CETR0470 02CETR0470
5 1 AIR BOX 02CNSA0376 02CNSA0376 02CNSA0377 02CNSA0377
6 1 IMIT AC02 DEVICE 02CEAP1028 02CEAP1028 02CEAP1028 02CEAP1028
7 1 ELECTRIC CONTROL PANEL KING FE 02CEQU0343 02CEQU0343 02CEQU0343 02CEQU0343
8 1 EV 100 CENTRIFUGAL FAN 02CEAS3002 02CEAS3002 02CEAS3002 02CEAS3002
9 1 TANGENTIAL FAN 02CEVT0622 02CEVT0622 02CEVT0623 02CEVT0623
10 1 WHITE ROGERS ELECTRONIC VALVE 02CEEC0164 02CEEC0164 02CEEC0164 02CEEC0164
SIT 850 MICRO ELECTRONIC VALVE 02CEEL0166 02CEEL0166 02CEEL0166 02CEEL0166
11 1REAR CAST IRON CASTING 02CNFU0201 02CNFU0201 02CNFU0203 02CNFU0203
12 1 BURNER 02CNBR0050 02CNBR0050 02CNBR0058 02CNBR0058
13 1 FRONT CAST IRON CASTING 02CNFU0200 02CNFU0200 02CNFU0202 02CNFU0202
14 1 SHELL 02MACO0031 02MACO0031 02MACO4055 02MACO4055

16
Rev. 12GB0712
SYSTEMA S.p.A. AIRTIGHT GAS CONVECTORS
2.9 Schema elettrico apparecchi
Series V wiring diagram
Series E wiring diagram
Draw 8
Draw 9
KEY
LPhase wire
NNeutral wire
WGround
DB Bipolar switch
TR Regulation thermostat
SB Lock-out light
SF Operation light
EV1 EV2 Electronic valve
ER Detection electrode
E ACC. Starting electrode
CEN Imit AC02 or Brahma CM11F
electronic valve
TL Work thermostat
KEY
LPhase wire
NNeutral wire
WGround
TCV Fan triggering thermostat
DV Speed change gear
VT Tangential fan

17 Rev. 12GB0712
SYSTEMA S.p.A.
AIRTIGHT GAS CONVECTORS
Series E with timer wiring diagram
Series VE wiring diagram
Draw 10
Draw 11
KEY
LPhase wire
NNeutral wire
WGround
DB Bipolar switch
TR Regulation thermostat
SB Lock-out light
SF Operation light
EV1 EV2 Electronic valve
ER Detection electrode
E ACC. Starting electrode
CEN Imit AC02 or Brahma CM11F
electronic valve
TL Work thermostat
KEY
LPhase wire
NNeutral wire
WGround
DB Bipolar switch
TR Regulation thermostat
TCV Fan triggering thermostat
VT Fan
DV Fan switch
SB Lock-out light
SF Operation light
EV1 EV2 Electronic valve
ER Detection electrode
E ACC. Starting electrode
CEN Imit AC02 or Brahma CM11F
electronic valve
TL Work thermostat

18
Rev. 12GB0712
SYSTEMA S.p.A. AIRTIGHT GAS CONVECTORS
Series VE with timer wiring diagram
Series FE wiring diagram
Draw 12
Draw 13
KEY
LPhase wire
NNeutral wire
WGround
DB Bipolar switch
TR Regulation thermostat
TCV Fan triggering thermostat
VT Fan
DV Fan switch
SB Lock-out light
SF Operation light
EV1 EV2 Electronic valve
ER Detection electrode
E ACC. Starting electrode
CEN Imit AC02 or Brahma CM11F
electronic valve
TL Work thermostat
KEY
LPhase wire
NNeutral wire
WGround
DB Bipolar switch
TR Regulation thermostat
TCV Fan triggering thermostat
VT Fan
DV Fan switch
SB Lock-out light
SF Operation light
EV1 EV2 Electronic valve
ER Detection electrode
E ACC. Starting electrode
CF Fan
CEN Imit AC02 electronic valve
TL Work thermostat

19 Rev. 12GB0712
SYSTEMA S.p.A.
AIRTIGHT GAS CONVECTORS
Series FE with timer wiring diagram
Draw 14
KEY
LPhase wire
NNeutral wire
WGround
DB Bipolar switch
TR Regulation thermostat
TCV Fan triggering thermostat
VT Fan
DV Fan switch
SB Lock-out light
SF Operation light
EV1 EV2 Electronic valve
ER Detection electrode
E ACC. Starting electrode
CF Fan
CEN Imit AC02 electronic valve
TL Work thermostat

20
Rev. 12GB0712
SYSTEMA S.p.A. AIRTIGHT GAS CONVECTORS
Draw 15
3 INSTRUCTIONS FOR INSTALLERS
3.1 Places of installation and
safety distances
We recommend observing the following rules in order to
obtain the maximum convector output efficiency:
- Position the device while bearing in mind the priority
areas to be heated, the absorption walls (windows,
doors, French windows etc.), and the existence of
shelves and other obstacles that might compromise
the circulation of the hot air released by the radiator
above and the effect of the heat radiated from the
front panel.
- If more than one device must be installed in the
same room, we recommend staggered and oppo-
sing positioning in order to provide the entire area
with uniform coverage.
- The devices must never be installed in recessed
niches or positions that do not ensure sufficient
aeration for good operation.
- Install the devices along perimetral walls whenever
possible.
- Observe the following rules to simplify interven-
tions on the radiator or the removal of the shell:
a) the distance of the device from the floor must
never be less than 10 cm.;
b) any shelves installed above the radiator must be
positioned at least 10 cm higher;
c) a minimum distance of 10 cm from the wall must
be respected whenever devices are installed in
recessed niches;
- avoid positioning furnishings above the shell.
Installation must be performed only by qualified profes-
sionals in complete respect of the safety regulations in
force. The Manufacturer declines all liability for erro-
neous installation or the inappropriate or incorrect use of
the device.