Innovation has a name.
Cyclone BFC
Condensing Glass-Lined
Water Heater
BFC - 28/30/50/60/80/100
Fully room-sealed condensing high-effi ciency water heater (95%gross)
• Flexible fl ue options (maximum length 115 m) allows installation
almost anywhere • ThermoControl for easy fl exible control/fault
diagnosis • Meets latest EPC standards: Cyclone BFC 28-60: 0.902
• Utilises premix Low-NOx burner BFC 80/100 • Patented Cyclone
burner BFC28-60 • All models suitable for natural or LP gas
• Programmable for legionella purge cycle • Scale formation is
reduced through the improved design and location of the heat
exchanger • Cyclone BFC 80/100: comes as standard with powered
anodes to reduce maintenance requirements • Remote control
connection • Voltage-free contact for general fault indication
• Optional ancillaries: Unvented kits • Destratifi cation pump kit
• Powered anodes
Meets
EPC
standards
Cyclone BFC
Technical specifications
BFC 28
BFC 30
BFC 50
BFC 60
BFC 80
BFC 100
Gas data natural gas 2H (G20)
Input* kW 32.1 34.5 52.6 63.2 86.6 105.5
Output kW 30.5 32.7 48.8 59.6 81.9 99.8
Inlet pressure mbar 20 20 20 20 20 20
Burner pressure mbar 8.5 8.5 8.5 11.5 7.0 6.0
Gas consumption** m
Diameter main orifice mm 4.90 5.10 7.00 7.10 6.30 6.80
Max. flue gas temperature °C 70 50 75 75 50 50
Flue gas discharge kg/h 56.8 61.1 85.4 101.4 141.9 164.3
3
/h 3.1 3.3 5.0 6.0 8.3 10.1
Gas data butane 3+ (G30)
Input* kW 30.7 32.8 50.6 59.4 - Output kW 29.8 31.8 48.1 57.4 - Inlet pressure mbar 30 30 30 30 - Burner pressure mbar 30 30 30 30 - Gas consumption** kg/h 2.2 2.4 3.7 4.3 - Diameter main orifice mm 2.50 2.60 3.40 3.80 - Max. flue gas temperature °C 70 50 75 75 - Flue gas discharge kg/h 60.0 62.2 86.0 101.9 - -
Gas data propane 3+ (G31)
Input* kW 29.0 30.9 50.3 59.1 84.8
Output kW 28.1 29.8 47.7 56.9 81.9
Inlet pressure mbar 37 37 37 37 37
Burner pressure mbar 37 37 37 37 13.0
Gas consumption** kg/h 2.1 2.2 3.6 4.2 6.1
Diameter main orifice mm 2.50 2.60 3.40 3.80 4.70
Max. flue gas temperature °C 70 50 75 75 50
Flue gas discharge kg/h 54.3 56.5 85.1 101.0 142.1
***
103.3
***
99.8
***
37
***
13.0
***
7.4
***
5.10
***
50
***
176.4
***
***
***
***
***
***
***
***
Draw-off capacity
Storage capacity l 217 368 368 368 460 460
Max. temperature setting °C 80 80 80 80 80 80
T
= 10ºC / T
cold
30 min. ∆T=44°C l 505 689 831 925 1222 1379
60 min. ∆T=44°C l 802 1008 1308 1507 2023 2354
90 min. ∆T=44°C l 1100 1327 1785 2089 2823 3329
120 min. ∆T=44°C l 1398 1646 2262 2671 3623 4304
Continuous ∆T=44°C l/h 595 638 954 1164 1601 1950
Heating-up time ∆T=44°C min. 22 35 23 19 17 14
30 min. ∆T=50°C l 444 606 731 814 1076 1214
60 min. ∆T=50°C l 707 887 1151 1326 1780 2072
90 min. ∆T=50°C l 968 1168 1571 1839 2484 2929
120 min. ∆T=50°C l 1230 1449 1991 2351 3189 3787
Continuous ∆T=50°C l/h 524 562 840 1024 1409 1716
Heating-up time ∆T=50°C min. 25 39 26 22 20 16
30 min. ∆T=55°C l 404 551 665 740 978 1109
60 min. ∆T=55°C l 642 806 1046 1206 1618 1883
90 min. ∆T=55°C l 880 1062 1418 1671 2258 2663
120 min. ∆T=55°C l 1118 1317 1810 2137 2899 3443
Continuous ∆T=55°C l/h 476 511 763 931 1281 1560
Heating-up time ∆T=55°C min. 27 43 29 24 22 18
set
= 70ºC
Electrical data
Power consumption W 275 275 275 275 625 710
Power supply VAC/Hz 230 (-15/+10%). 50 (+/-1Hz)
General
Fan rotational speed at ignition r.p.m. 4500 4500 4500 4500 2790 3120
Working speed of fan r.p.m. 5000 5400 6000 6660 5100 5700
Pressure differential Pa 635/605 855/825 885/855 1085/1055 1005/975 1145/1115
Diameter of air restrictor mm 23 23 28 29 36 38
Anodes - 4 4 4 4 2 2
Maximum working pressure bar 8
Shipping data
Weight empty kg 177 214 214 214 480 480
Maximum weight kg 394 582 582 582 940 940
Weight incl. packaging kg 197 234 234 234 491 491
Width packaging mm 790 790 790 790 920 920
Height packaging mm 1550 2080 2080 2080 2060 2060
Depth packaging mm 950 950 950 950 1020 1020
*** 3P (G31)
* Gas data on gross value
** Gas consumption at 15°C and 1013.25 mbar
BFC 80-100
BFC 28-60
Cyclone BFC
Dimensions
A 1390 1910 1910 1910 2060 2060
C - - - - 530 530
D 705 705 705 705 850 850
E - - - - 1000 1000
F - - - - 900 900
G 80/125 100/150 100/150 100/150 130/200 130/200
H 1365 1905 1905 1905 2015 2015
Hx 265 265 265 265 310 310
Hy 375 375 375 375 440 440
K 1270 1800 1800 1800 1855 1855
M 170 160 160 160 225 225
N 1390 1910 1910 1910 2060 2060
Ny 205 205 205 205 205 205
P 170 175 175 175 290 290
R 85 75 75 75 225 225
S 900 1410 1410 1410 1425 1425
W 125 145 145 145 240 240
1 Cold water (external) R11/2
2 Hot water (external) R1
1
/2
3 Gas control (internal) Rp
3
/4
4 Tank drain valve (internal)
3
/4
5 T&P valve (internal) 1-11.5 NPT
6 Cleaning and inspection opening 95x70
7 Condensation drainage (internal) Ø40 (BFC 28)
Rp 1 (BFC 30-100)
Dimensions in mm. All Cyclone BFC water heaters receive a
three years warranty on the tank and one year on parts.
BFC 28
BFC 30
BFC 50
BFC 60
BFC 80
BFC 100
Vented
Unvented
1 Pressure reducing valve
3 T&P valve
4 Stop valve
5 Non-return valve
6 Circulation pump
9 Drain valve
10 Gas cock
11 Isolating valve
12 Temperature gauge
13 Condense drain
14 Hot water outlets
15 Expansion relief valve
16 Expansion vessel
17 Three way valve
18 Water tank
19 Float valve
A Cold water
B Hot water
C Return circulation
D Gas supply
E Overfl ow pipe
H Expansion vent pipe
A.O. Smith unvented system kits utilise combination valves.
Further installation and connection details can be found in
the Installation & Commissioning Manual.
Cyclone BFC
Installation diagrams
Cyclone BFC
Colour cables
1 = brown
2 = blue
3 = yellow/green
4 = black
5 = white (flat cable)
6 = grey/beige
Colour cables
1 = brown
2 = blue
3 = yellow/green
4 = black
5 = white (flat cable)
6 = grey/beige
7 = red
8 = green
Electrical diagram BFC 28-60
TERMINAL STRIP CONNECTIONS
Earth
N Neutral
L1 Phase input of controller
L2 Phase input of isolating
transformer (primary side)
L3 Phase output of isolating
transformer (secondary side)
L4 Phase input of program-controlled
pump
L5 Phase input of continuous pump
COMPONENTS
A Controller
B Ionisation rod
C Glow igniter
D Gas control
E Burner earth connection
F Extra ON mode switch
G Continuous pump
H Program-controlled pump
J Extra error signal
K Isolating transformer
L Double-pole mains switch
M ON/OFF switch control
N Display/Flat cable
O Fan
P Temperature sensor
(T2 - bottom of tank)
Q Dummy
R Temperature sensor
(T1 - top of tank)
S Selection resistor
T Pressure switch
CONTROLLER CONNECTIONS
J1 Connector for display to controller
J2 Connector for power supply to
controller
J19 Connector for extra error signal
J20 Connector for gas control
J21 Connector for program controlled pump
J24 Connector for fan
JP2 Connector for ionisation rod and
glow igniter
JP3 Connector for temperature
sensor T2
JP4 Connector for dummy
JP5 Connector for temperature
sensor T1
JP6 Connector for selection resistor
and pressure switch
JP8 Connector for extra
ON mode switch
F1 Fuse
F2 Fuse
Cyclone BFC
Electrical diagram BFC 80-100
TERMINAL STRIP CONNECTIONS
Earth
N Neutral
L Phase input of controller
L1 Phase output of isolating
transformer ( secundary side)
L2 Phase input of isolating
transformer ( primary side)
L3 Phase input of program controlled pump
L4 Phase input of frequency
controller
L5 Phase input of continuous pump
COMPONENTS
A Controller
B Ionisation rod
C Glow ignitor
D Gas control
E Burner earth connection
F External ON-mode switch
G Program-controlled pump
H External error-signal
J Isolating transformer
K Double-pole mains switch
L Controller 0/1 switch
M Display/Flat cable
N Fan
O Temperaturesensor
(T2-bottom of tank)
P Dummy
Q Temperaturesensor
(T1-top of tank)
R Selection resistor
S Pressure switch
T Potentiostat
U Frequency controller
V Argus-link interface
W Electric anodes
X Signaling for electric anodes
Y Mains choke and EMC filter
CONTROLLER CONNECTIONS
J2 Connector for power supply
to controller
J19 Connector for external error-signal
J20 Connector for gas-control
J21 Connector for program
controlled pump
J36 Connector for display
to controller
J39 Connector for fan controlled signal
JP2 Connector for ionisation rod and
glow ignitor
JP3 Connector for temperature
sensor T2
JP4 Connector for dummy
JP5 Connector for temperature
sensor T1
JP6 Connector for selection resistor,
pressure switch and anode
signaling
JP8 Connector for extra
ON-mode switch
F1 Fuse
F3 Fuse
Flue systems Cyclone BFC
Installation options
B23
C33
C13
A Cyclone BFC water heater should be installed according
category B23, C13, C33, C43 or C53*.
BFC 28
BFC 30
BFC 50
BFC 60
BFC 80
Concentric
Diameter (mm) 80/125 100/150 100/150 100/150 130/200 130/200
Max. length (m) 40 40 40 15 15 15
Max. 45/90° bends 7 7 7 4 3 3
Parallel (standard diameter)
Diameter (mm) 80 100 100 100 130 130
Max. length (m) 25 80 45 25 115 60
L
/bend 90° (m) 3,9 4,6 4,6 4,6 2,4 2,4
equivalent
L
/bend 45º (m) 1,1 1,2 1,2 1,2 1,4 1,4
equivalent
Parallel (larger diameter for more length)
Diameter (mm) 100 130 130 130 150 150
Max. length (m) 100 100 100 100 100 100
L
/bend 90º (m) 4,6 2,4 2,4 2,4 2,6 2,6
equivalent
L
/bend 45º (m) 1,2 1,4 1,4 1,4 1,6 1,6
equivalent
* All Cyclone BFC are also approved for installations where the unit is supplied
without venting materials (C63).
BFC 100
Concentric flues
It is not permitted to use more than the specified number of
bends, even when the duct is shorter than the maximum
length. A 45° bend is equivalent to a 90° bend.
C53
C43
Flue systems Cyclone BFC
Minimum space requirements
BFC 28-60
BFC 80-100
Parallel flues
- The maximum permissible length should be reduced by the
equivalent length of each bend. (Note: for a parallel installation
this means that 3 changes in direction amount to 6 bends
(3 in the supply duct and 3 in the flue).
- The maximum length also applies if a parallel installation has
different supply and flue duct lengths (B23, C53).
- Combined flues (C43) shall be fitted with a condensate drain.
Note: horizontal flue runs must be installed with a fall of at least
5 mm per metre.
BFC 28
BFC 30
BFC 50
BFC 60
BFC 80
Minimal space for wall duct (mm)
Ø80/125 Ø100/150 Ø100/150 Ø100/150 Ø130/200 Ø130/200
V 550 550 550 550 640 640
W 725 790 790 790 940 940
X 1535 2075 2075 2075 2230 2230
Y 1460 1480 1480 1480 1620 1620
Y * 1010 1030 1030 1030 1170 1170
Minimal space for roof duct (mm)
V 1305 1500 1500 1500 1730 1730
W 680 1035 1035 1035 1120 1120
X 2965 3325 3325 3325 3620 3620
X ** 2015 2375 2375 2375 2670 2670
Y 1575 1415 1415 1415 1560 1560
Y ** 625 465 465 465 610 610
BFC 100
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For the parts numbers of components and flue gas ducts, etc.
please refer to the “Maintenance and accessories” chapter.
* Distance without concentric pipe between bend and wall duct.
** Distance without concentric pipe between appliance and roof duct.
Data subject to change INT/1108/BFC/04
Terms and conditions apply, please refer to our website
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