1
A Honeywell Company
MMI 813.1
Gas burner automatic
safety control
For 2-stage forced draught gas burners
Designated for an air damper control
Possible flame detectors:
- Ionization probe
- Infrared flicker detector
For external resetting, the remote reset device FR 870
(art. No. 70700) can be utilized. (Refer to documentation
750).
Automatic Control MMI 813.1
Model 23
Waiting time at start approx. tw 9
Maximum reaction time
of air pressure monitor tlw 10
Pre-purge time tv1 34
Air damper open signal
during pre-purge tlk 36.5
Pre-ignition time tvz 3
Ignition time, overall tz 6
Ignition safety time ts 3
Delay time terminal 6 tv2 6
TECHNICAL DATA
Operating voltage 220 / 240 V (-15... +10%)
50 Hz (50 - 60 Hz)
Differing frequency results in a proportional
deviation of the time.
Rating fuse max. 10 A rapid, 6 A slow
Power consumption 10 VA
Max. current per output
term. 3 2A, cos ϕ 0.2
term. 4, B 2A, cos ϕ 0.4
term. 5, 6, C 1A, cos ϕ 0.4
Total load 5A, cos ϕ 0.4
Amplifier sensitivity 1 µA
Minimum required
Ionization current 5 µA
Flame detector cable max. 20 m cable length
Air pressure monitor 1 working contact 4 A, 220 V
Waiting time for
malfunction remedy none
Running time
air damper for 90° max. 15 sec.
Flame detector
- Ionization probe
- Infrared flicker detector IRD 1020
Weight, incl. base 350 g
Mounting position any
Insulation standard IP 44
Admissible ambient
temperature for controller
and flame detector -20° C... +60° C
Classification acc. EN 298 BTLLXN
INTRODUCTION
The gas burner automatic safety control MMI 813.1 controls
and monitors blown gas- and combined burners of any
nominal thermal load (tested and certified according to
EN 298).
Together with an air damper motor, a 2-stage burner with
2 fuel valves, a 2-stage operation with 1 fuel valve or a
modulating system ave possible.
CONSTRUCTIONAL FEATURES
The automatic control is housed in a non-inflammable,
transparent, plug-in type plastic case and contains:
– Synchronous motor with speed reducer gears as the
drive for the switching cam
– Switching cam with informative programme display in
colour
– 12 times cam drive for controlling the programme
sequence
– Plug-in type circuit boards with the electronic components
The following important indicating - and operating elements
are located on the front panel of the automatic control:
– Illuminated pushbutton for indication of malfunctions
and reset
– Programme display in colour
– Screw for central mounting
0708.24-01-e/04/99
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