Control box honeywell
Type :
– TMG 740-3 MOD 43-35 220vac
– TMG 740-3 MOD 43-35 110VAC
– TMG 740-3 MOD 32-32 220VAC
– TMG 740-3 MOD.13-53 220VAC
For high performance forced draught and fuel burners in intermittent operation (single or two stage versions).
Suitable flame detectors :
– Ionisation probe
– UV sensor
– Infrared flicker detector
INTRODUCTION
The TMG 740-3 burner control box is capable of controlling
and monitoring medium to high performance forced draught
and dual fuel oil/gas burners in single or two stage versions.
It can be used, as prefered, for multi-stage or modulating
operation with burners of any nominal rating as well as in
direct air heaters (as per DIN 4794).
Different model designations identify the control boxes
according to programme times for varying national standards,
or for special applications e.g. high-speed steam generators.
A special version is available for operation with ignition
spark monitoring in conformance with French national
regulations.
The TMG 740-3 is fully interchangeable with the earlier
versions -1 and -2.
CONSTRUCTIONAL FEATURES
The control box is enclosed in a protective, flame resistant,
transparent, plug-in type plastic housing, and includes:
– Synchronous motor with gearbox driving cam switch
– Cam switch with informative, coloured programme
indicator
– 16-way cam switch assembly controlling the programme
sequence
– 2 DC relays and 1 remanence relay on common yoke
– Plug-in printed circuit board with mains transformer, LED
display and electronic components
On the underside of the unit are robust plug terminals where
the air proving switch and monitoring of the ignition spark
can be programmed via two wire links which can be cut as
required. The flame detector selection switch is also situated
on the the underside of the unit.
The following important indicators and operating controls
can be found on the front of the control box:
– Reset button incorporating signal lamp for malfunction
(lockout)
– Coloured programme indicator
– Flame signal indicator with 5 LED’s
– Central screw fastening
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