Honeywell Satronic TFI 812 Series User manual

1
A Honeywell Company
TFI 812
Gas Burner Control Box
INTRODUCTION
The TFI 812.2 gas burner control boxes are capable of
controlling and monitoring atmospheric gas burners. They
have been tested and approved as per DIN 4788 part 3
edition 04.89 and with the European standard EN 298. They
are also suitable for use with stationary warm air generators
(as per DIN 4794).
The control boxes are designed for maximum safety in case
of fluctuations in the voltage supply. If the mains voltage
drops below the permitted level, operation is interrupted
and the control box automatically prevents the start sequence
from being repeated. In this way, the safety of the system is
not put at risk by a drop in the mains voltage.
The control box and the monitoring function which it performs
is not negatively affected by occasional stray ignition sparks
jumping to the ionisation electrode.
The FR 870 remote reset (item no. 70700) can be connec-
ted, and allows remote reset of the control box (see doc.
no. 750).
The TFI 812 mod.5 can be installed in place of the TFI
712 F, and the TFI 812 mod.10 can be employed to replace
the TFI 712.
It is not necessary to rewire or replace the baseplate. The
difference in the heights of the units can be compensated by
attaching the reset button extension (item no. 70601).
The difference between the TFI 812.1 and the TFI 812.2 is
that the TFI 812.2 control boxes are equipped with the
voltage drop fail-safe function. Otherwise, they are identical
in terms of operation and possible applications.
CONSTRUCTIONAL FEATURES
The control box is well protected by a flame-resistant,
transparent, plug-in type plastic housing which encloses
the thermo-mechanical temperature-compensated timing
unit, the flame monitoring unit and the reset device.
The reset button, which incorporates an indicator lamp, and
the central screw fastening, are situated on the upper part
of the control box.
The baseplate, which can be equipped with additional
terminals, together with the various optional cable entry
points, makes universal wiring possible.
For 2-stage atmospheric gas burners
Possible flame detectors:
- Ionisation probe
- Infra-red flicker detector
TYPES AVAILABLE
TFI 812.2 mod. 5 Safety interval nominal 5 sec.
Pre-ignition time approx. 15 sec.
appropriate nominal capacity
according to the appliance standort
or the gas appliance directive.
TFI 812.2 mod. 10 Safety interval nominal10 sec.
Pre-ignition time approx. 10 sec.
appropriate nominal capacity
according to the appliance standort
or the gas appliance directive.
TFI 812.2 B mod. 5 dito – without Pre-ignition time
TFI 812.2 B mod. 10 dito – without Pre-ignition time
TECHNICAL DATA
Supply voltage 220 / 240 V (-15... +10%)
50 Hz (40 - 60 Hz)
Fuse rating 10 A rapid or 6 A slow
Power consumption 5 VA
Max. current per
output terminal 4 A
Max. current total 6 A
Pre-ignition time 15 or 10 sec.
Delay, post-ignition time none
Safety interval nominal 5 or 10 sec.
Safety interval max. 10 or 20 sec.
2nd stage delay approx. 20 sec.
Reset delay after lockout approx. 60 sec.
Permissible ambient temperature -20°C to +60°C
Sensitivity 1.5 µA
Min. ionisation current required 2 - 3 µA
Ionisation probe insulation probe - earth
greater than 50 MΩ
Stray capacitance probe - earth
less than 1000 pF
(max. 20 m cable)
Insulation standard IP 44
Weight incl. baseplate 250 g
Mounting attitude any
EN1C-0143SZ20 R0305
Distribuitor:
FLAME POWER SRL
021-3121727 ; 0744-340566
[email protected] ; www.arzatoare.ro

2
TECHNICAL FEATURES
1. Flame detection
The following types of flame detectors are suitable:
- Ionisation probe, temperature resistant material, well
insulated (material and insulation same as for ignition
electrode).
- IRD 1020.1 infra-red flicker detector
Flame detection using an ionisation probe is only possible
in conjunction with mains supplies which provide a neu-
tral earth connection.
The ionisation rod has to be installed in a way that
the distance to the ignition electrode is big enough
to prevent the spark to jump to the ionisation rod.
2. Safety
In terms of design/construction and programme sequence,
the TFI 812 control boxes conform to the presently appli-
cable European standards and regulations.
3. Installation
At the baseplate:
– 3 earth terminals with additional terminal for burner
earthing
– 3 neutral terminals with internal permanent connection to
neutral terminal 8
– 2 independant spare terminals (S1 and S2)
– extra terminals A, B and C are standard (wiring base S98
12-pin)
– 2 slide-in plates and 2 easy knock out holes plus 2 knock
out holes in the base bottom faciliate the base wiring
Please note
To assist trouble-free operation the main neutral
connection terminal 8 in the wiring base must be
fully tightened. The terminal screws are already in
the undone position. To connect a wire to the
terminal, the screw only needs to be fastened.
General:
- Can be mounted in any position, insulated as per IP 44
standard (unaffected by water spray).
The control box and detector probe should not, however,
be subjected to excessive vibration.
- The applicable installation regulations must be observed
during installation.
COMMISSIONING AND MAINTENANCE
1. Important notes
- The wiring must be checked exactly when commissioning
the installation. Incorrect wiring could damage the con-
trol box, putting the safety of the burner system at risk.
- The chosen fuse rating must not, on any account, be
higher than the value given in the technical data. Failure to
observe this instruction could, in the case of a short circuit,
have serious consequences for the control box or burner
system.
- For safety reasons, it must be ensured that the control box
performs at least one normal shut-down during every
24 hour period.
- Switch off or disconnect the power before plugging in or
unplugging the unit.
- Burner control boxes are responsible for the safety of the
system and should not be opened.
2. Routine checks
On commissioning or after servicing the burner system, or
if the system has not been in operation for a long period, a
check of the safety-relevant control box functions must be
made.
a) Attempt to start with gas valve closed:
- At the end of the safety interval
-> Lockout
b) After a normal start, with the burner in operation, close
the gas valve:
- At the end of the safety interval, system attempts to
restart
-> Lockout
3. Possible faults
Burner does not start:
- Fault in electrical supply, thermostat OFF
- Mains voltage too low
Switches to lockout after attempted start without establishing
flame:
- No ignition or no fuel reaching burner
- Flame signal during the pre-purge phase
- Mains voltage more than 15% below nominal value
Burner starts, flame is established but control box switches
to lockout after elapse of safety interval:
- No flame signal or signal too weak
- Flame detector dirty or defective
TFI 812

3
HS Main switch ST Safety thermostat
RT Controlling thermostat RF Flame relay
B Thermal timing unit V1 Valve1
R26 Resistor V2 Valve 2
Ion Ionisation probe SA Lockout indicator
ZT Ignition > Amplifier IV7
WIRING AND SEQUENCE DIAGRAMS TFI 812.2
IRD CONNECTION
GENERAL CIRCUIT DIAGRAM TFI 812.2
HS Main switch
GW Gas proving switch
ST Safety thermostat
RT Controlling thermostat
IS Ionisation probe
Z Ignition
V1 Solenoid valve, 1st stage
V2 Solenoid valve, 2nd stage
SA remote lockout indicator
M Auxiliary blower
tw Pre-ignition time
approx. 15 sec. (mod. 5)
approx. 10 sec. (mod. 10)
ts Safety time nominal 5 sec. (mod. 5)
10 sec. (mod. 10)
tv2 2nd stage delay approx. 20 sec.
blue
black
brown
Kl. 8
Kl. 1
Kl. 9
IRD 1020.1
TFI 812
RF
R26
1
Ion
9
RT
ST
HSPh
Bs
v1
b
z
365748
ZTV2V1 SA
N
SA
Z
V1
IS
M
V2 SA
10A max. HS ST GW RT Ph
N
1234 5 6789
tw ts tv2
10A fast
6A slow

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A Honeywell Company
Satronic AG
Honeywell-Platz 1
Postfach 324
CH-8157 Dielsdorf
MEASUREMENT OF THE FLAME SIGNAL
DIMENSIONS WITH BASEPLATE TFI 812
TFI 812
IRD 1020.1
1
E
+
-
TFI 812
The signal should
be greater than 5 µA
0 - 10 µA
0 - 100 µA
The Satronic Ionimeter
is ideal for making
this measurement.
35
3
26
4.5
15.1
48
ø20.5
4
17
14
HOLDER M93
104
50 44
29
21.8
ø13.5
ORDERING INFORMATION
ITEM DESIGNATION ITEM NO.
Control box TFI 812.2 mod. 5 02601
Control box TFI 812.2 mod. 10 02602
Control box TFI 812.2 B mod. 5 no longer available
Control box TFI 812.2 B mod. 10 no longer available
Socket Wiring base S98 9-pin 75300
Socket Wiring base S98 12-pin 75310
Insert plate PG plate 70502
optionally Cable entry plate 70503
Flame detector IRD 1020.1 end-on viewing 16532
Flame detector IRD 1020.1 side-on left 16533
Flame detector IRD 1020.1 side-on right 16531
IRD mounting flange IRD Holder M93 59093
Flame detector cable 3-wire, 0.6 m 7236001
The above ordering information refers to the standard version.
Special versions are also included in our product range. Specifications subject to change without notice.
30
86 60
insert plate
24
Reset button
30
57-60
Underside cable
entry ø 16 mm
Earth
M4
30
4416 62,5
38,5
24 4,5
25 35