Robur Line F1 Series Manual

Heaters Line F1 Series
Gas fired unit heaters
for heating medium-large areas
Natural gas/LPG fired
Installation, use and
maintenance manual

User, Installation and Service Manual for F1 Gas Unit Heaters 1
F1 GAS FIRED UNIT HEATERS
TABLE OF CONTENTS
SECTION 1 - GENERAL WARNINGS ................................................................................3
SECTION 2 - GENERALITY AND CHARACTERISTIC......................................................5
OPERATION OF THE UNIT......................................................................................................................... 5
CONSTRUCTIVE CHARACTERISTICS...................................................................................................... 5
SAFETY AND CONTROL DEVICES ........................................................................................................... 6
TECHNICAL CHARACTERISTICS.............................................................................................................. 7
DIMENSIONS OF THE UNITS..................................................................................................................... 8
SECTION 3 - INSTALLATION ............................................................................................9
GENERAL RULES ....................................................................................................................................... 9
SIZE AND INSTALLATION OF THE AIR INLET / FLUE EXHAUST ......................................................... 11
SUPPORT BRACKET INSTALLATION ..................................................................................................... 17
INSTALLATION OF REMOTE CONTROL BOX........................................................................................ 17
BURNER PRESSURE ADJUSTMENT......................................................................................................18
CONVERSION TO ANOTHER TYPE OF GAS.......................................................................................... 20
OPERATING WIRING DIAGRAM.............................................................................................................. 22
INSTALLATION WIRING DIAGRAM.......................................................................................................... 23
WIRING DIAGRAM FOR MULTIPLE UNIT INSTALLATIONS .................................................................. 24
SECTION 4 - USE AND OPERATION ..............................................................................27
START AND STOP OF THE UNIT............................................................................................................. 27
SECTION 5 - MAINTENANCE AND SERVICING.............................................................29
REMOVABLE BURNER............................................................................................................................. 29
OPERATING FAILURES............................................................................................................................ 30
TYPES OF FAILURES AND SERVICING.................................................................................................. 30
CASE N°1: The unit locks out during the first ignition phase. ................................................................................30
CASE N°2: The unit locks out during operation. ....................................................................................................30
CASE N°3: The temperature limit thermostat (M1) stops the burner. ....................................................................31
CASE N°4: The burner goes out and does not re-ignite even if room temperature requires it...............................31
CASE N°5: The exhaust fan will not start...............................................................................................................31
CASE N°6: The exhaust fan starts but the unit does not ignite..............................................................................31
TROUBLESHOOTING FLOW CHART ......................................................................................................32

User, Installation and Service Manual for F1 Gas Unit Heaters
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User, Installation and Service Manual for F1 Gas Unit Heaters 3
SECTION 1 - GENERAL WARNINGS
- This manual is an integral and essential part of the product and must be given to the user.
-Qualified service engineers are those having specific technical experience in the field of
heating installation unit for domestic and industrial use. In the case of any doubt,
contact your local agent or Manufacturer.
-This unit must be exclusively used for the purpose it was intended. Any other use is to be
considered improper and therefore dangerous.
The manufacturer will not be held responsible for damages resulting from installation errors or
failure to comply with the manufacturer’s instructions.
-Do not obstruct the fan intake opening or the air delivery grids.
-In case of failure and/or poor operation, isolate the unit (disconnect it from the power supply
and close the main gas cock), do not attempt any repair or direct servicing.
Call qualified service engineers only.
The manufacturer’s authorised service centres using only original spare parts must only carry
out any repair to the products.
Misapplication of the above might compromise the safety of the unit.
To ensure unit efficiency and correct operation, it is essential that qualified service engineers
carry out annual maintenance following the manufacturer’s instructions.
-Should the unit be sold or transferred to another owner, please ensure that the manual
remains with the unit for use by the new owner and/or installer.
- Before turning the heater on, a qualified service engineer must check:
•that electric and gas supply ratings are the same as those given in the data plate.
•that the exhaust duct operates correctly.
•that combustion air feed and exhaust occur correctly according to the existing standards.
•the internal and external tightness of the pass supply line.
•fuel flow control according to the heater’s power requirements.
•that the heater is supplied with the type of fuel for which it is pre-set.
•that the gas supply pressure is within rating limits.
•that the gas supply system is suitable to the heater and all safety and check-over devices
prescribed by existing standards are duly installed.
-Do not use gas pipes to ground the appliance, or any other electrical appliance.
-Avoid unnecessary supply when unit is not in use and always close the main gas cock.
-If the appliance is turned-off for a longer time period, close the main gas supply cock and cut
off the electrical supply.
WARNING!
If you smell gas
•do not operate electric switches, telephones or any other object or device which may cause
sparks;
•open immediately doors and windows to create a cross-current of air to purify the room;
•shut-off the gas supply;
•call for a qualified service engineer

User, Installation and Service Manual for F1 Gas Unit Heaters
4

User, Installation and Service Manual for F1 Gas Unit Heaters 5
SECTION 2 - GENERALITY AND CHARACTERISTIC
OPERATION OF THE UNIT
- The F1 gas fired air heater is an independent heater appliance with airtight combustion circuit
and forced air draft.
- It’s designed for an indoor installation - inside the area to be heated.
-It’s adjustable for the use of Natural Gas (G20) or LPG (G30/G31).
-The combustion circuit is airtight regarding heated room and conforms the standard EN 1020 for
the C type appliances: the air inlet of the combustion air and the flue exhaust are outdoors and
are ensured through the operation of combustion blower. The appliance is certified either for the
B type installations, where is allowed combustion air inlet from indoors (from the area to be
heated).
-A room thermostat, (not supplied with the unit) controls the heater operation.
-When the thermostat is turned on the flame control box, after the pre-purge period (about 40
seconds), ignites the burner.
-The flame sensor controls the ignition of the burner. If the flame does not appear the flame
control unit locks out the heater:
-The combustion products pass through the heat exchangers, the air flow given by the axial fan
provides warm air to the room.
-The airflow direction is regulated by means of adjustable louvres. A ‘’vertical louvres kit’’ is also
available on request for horizontal regulation of the airflow.
-The fan control thermostat allows the axial-flow fan to start automatically only when the heat
exchangers are hot and to turn off when they are cold. This prevents cool air being blown into
the room
-If heat exchangers overheat due to malfunction, the temperature limit thermostat cuts off the
supply to the gas valve, thus interrupts fuel flow and turns off the main burner
NOTE
After removing the cause of overheating, Qualified service engineer should carry out resetting of
the temperature limit thermostat,
-Ahead of the burner is installed the flue fan which makes the air-gas mixture and forces draft of
the exhaust flues.
-In case of obstructions in the intake duct or flue fan malfunction, a differential pressure switch
closes the gas valve and consequently stops fuel flow to the burner.
-In the summer time it’s possible to activate only the axial fan to provide pleasant and refreshing
air movement in the room. (see Section 4 - Paragraph “Summer”).
CONSTRUCTIVE CHARACTERISTICS
-premix burner made of stainless steel
-high head blower; models F1 51/61/81 are provided with electronic board that controls and
guarantees constant speed of the blower;
-cylindrical combustion chamber made of stainless steel
-heat exchanger patented by Robur made of special aluminium alloy, fining horizontally on the
air side and vertically on the flue side with extremely high capacity of thermal exchange
-insulated steel casing painted with epoxy powders
-axial fan with high air flow capacity
-according to the norms in force regarding the radio interference
-heat recovering post-ventilation

User, Installation and Service Manual for F1 Gas Unit Heaters
6
SAFETY AND CONTROL DEVICES
-High temperature limit switch: 100°C with manual reset (prevents the overheating of the heat
exchangers)
-Pressure differential switch: for the control of the correct flue fan operation; when fan not
operates correctly or the flue/air inlet ducts are obstructed the pressure switch stops the gas
supply by closing the gas valve.
-Gas valve: in the case that one of the safety devices is activated (limit thermostat, safety
thermostat etc.) the gas valve is automatically de-energised with contemporary cut-off the
burner’s gas supply.
-Electrical supply: 230 V – 50 Hz
-Operational temperature: 0°C to + 60°C
-Model: HONEYWELL VK 4125A for the Heaters F1 21. 31. 41. 51. 61
BM 762 for the Heater Model F1 81
-Ignition and flame control box: controls the ignition and flame of the premix burner; if the is
flame not detected during the safety period the flame control box will stop the appliance; with
manual reset.
-Safety time: ignition 10 seconds
-Purge time: 40 seconds
-Power supply: 230V – 50 Hz
-Flame control box model: BRAHMA CM32PR
-Ignition transformer: BRAHMA TC2LTCAF / EICHHOFF 4718/2
A
) flame control box
B) pressure switch
C) fuse 6,3A 5x20
B
AE
C
DD) speed regulation board
E) ignition transformer
Figure 1

User, Installation and Service Manual for F1 Gas Unit Heaters 7
TECHNICAL CHARACTERISTICS
MODEL UNIT F1 21 F1 31 F1 41 F1 51 F1 61 F1 81
Appliance Category II2H3+
Appliance type C13 - C33 - B23 - C63 - C53
Nominal heat input (5) kW 23,08 30,77 37,15 48,35 61,32 77,14
BTU 78804 105046 126841 165072 209357 263369
Nominal heat output kW 21 28 33,8 44 55,8 70,2
BTU 71698 95597 115407 150224 190520 239668
Efficiency (5) % 91 91 91 91 91 91
Nominal air flow (1) m3/h 2120 2860 4180 5100 5200 7800
Temperature rate K 31,1 30,7 29,5 31 31,8 26,7
Gas Consumption (2) Natural Gas m3/h 2,43 3,25 3,93 5,11 6,49 8,16
LPG G30
LPG G31
kg/h
kg/h 1,80 1,78 2,42 2,38 2,93 2,87 3,81 3,74 4,84 4,75 6,09 5,97
Inlet gas pressure Natural Gas
LPG. G30
LPG G31
mbar 20
30
37
Diameter gas inlet " 3/4F
Pipe Diameter air mm 80
flue mm 80
Voltage 230V - 50Hz
Wattage W 250 300 350 410 640 900
Operating temperature °C 0° +35°(4)
Fuse A 6,3
Throw
(residual air speed >1m/s) (3) m 14 16 20 22 25 29
Noise level 6 m distance
in free field dB(A) 41 43 44 46 47 49
in tipycal installation dB(A) 53 55 56 57 60 63
Weight kg 52 60 63,5 70 90 108
Table 1
1 At 20°C - 1013mbar
2 At 15°C - 1013mbar
3 THROWS FOR GUIDANCE ONLY. THROW DEPENDS ON HEIGHT OF THE BUILDING, MOUNTING HEIGHT OF THE HEATER, ROOM TEMPERATURE AND LOUVRE
SETTING.
4 WARNING: THE ROOM OPERATIONAL TEMPERATURE IS BETWEEN 0° AND +35°C ;THE APPLIANCE’S COMPONENTS OPERATIONAL TEMPERATURE IS BETWEEN
0° AND +60°C
5 DATA REFERED TO THE LOW HEAT VALUE (9,45 kWh/m3- 15°C 1013 mbar)
WITH THE AIM OF CONTINUOUSLY IMPROVING THE QUALITY OF ITS PRODUCTS, THE
MANUFACTURER RESERVES THE RIGHT TO VARY ABOVE INFORMATION WITHOUT ANY PRIOR
NOTICE.

User, Installation and Service Manual for F1 Gas Unit Heaters
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DIMENSIONS OF THE UNITS
A B C D E F G H J L N
F1 21 630 651 800 490 370 405 440 430 120 285 95
F1 31 630 671 800 490 370 405 440 430 120 285 95
F1 41 770 626 800 490 510 405 580 430 120 285 95
F1 51 880 658 800 490 620 405 690 430 120 285 95
F1 61 1070 640 800 490 810 405 880 430 120 285 95
F1 81 1270 700 800 490 1010 405 1080 430 120 285 95
P Q R S T U V W X Y Z
F1 21 390 435 340 600 720 90 3/4 - 80 80 355
F1 31 390 435 340 600 720 90 3/4 - 80 80 355
F1 41 460 435 340 600 720 90 3/4 - 80 80 410
F1 51 515 435 340 600 720 90 3/4 - 80 80 410
F1 61 398 435 340 600 720 90 3/4 432 80 80 355
F1 81 468 435 340 600 720 90 3/4 495 80 80 410
Y
X
T
S
R
N
U
J
P
W
Z
4
V
123
VISTA POSTERIORE
F1 81-61
C
Q
F
D
B massima
VISTA LATO DESTRO
A
G
E
L
H
VISTA FRONTALE
Y
X
T
S
R
N
U
J
P
Z
VISTA POSTERIORE
F1 21-31-36-41-51
V
123
4
1 SCARICO FUMI
2 PRESA ARIA
COMBURENTE
3 INGRESSO CAVO
DI ALIMENTAZIONE
4 ATTACCO GAS
IM3050
Figure 2
REAR VIEW REAR VIEW
RIGHT SIDE VIEW FRONT VIEW
B maximum
1. Flue Exhaust
2. Air Supply
3. Power Line
4. Gas Connection