Altronic DD-40NTS-O, Руководство по установке

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3.0 WIRING (SEE WIRING DIAGRAMS)
3.1 The annunciator unit plugs into the power supply through a DB-9 connector.
3.2 The sensor leads connect to the removable terminal strips on the back of the annunciator.
These terminal strips match those used with the earlier DD-40NT / DD-20NT systems.
3.3 At the terminal strip of the Annunciator unit, strip the insulation back 3/8"; twist the exposed
wires tightly together. Insert the exposed wire end completely into the terminal strip and
securely tighten the clamping screw. It is suggested that wire 18 AWG (max.) to 24 AWG
(min.) be used for the connections directly to the annunciator terminal strip connector.
3.4 Wires running to the various sensors should be in good condition or replaced with new wiring.
Terminations to the main panel terminal strip (if used) should be made with a suitable terminal
and crimping tool or by soldering. There is no requirement for explosion-proof conduit or
Class I enclosures; however, suitable physical protection should be provided.
CAUTION:
a.) SENSOR WIRING: Sensor wires within the panel enclosure must be kept at least two
(2) inches from other wiring. Use a separate junction box for ignition and fuel valve
wires. Run sensor leads leaving the panel in a conduit separate from all other wiring and
keep separate throughout the installation. Wiring to the sensors must have a grade of
insulation capable of withstanding an AC voltage of 500 V. RMS. Sensor leads may be
connected to any passive device using contacts such as standard switch gauges or level
switches. DO NOT connect sensor leads to relay contacts or to any voltage producing
element.
b.) Sensors will be exposed to much lower voltages and current than with the standard
Murphy tattletale or similar type system. In the case of a field conversion where sensors
have previously been used with Murphy tattletales, it is recommended that the sensors
be checked frequently when the DD system is first put into use. Sensor contacts may
be burned or pitted from past exposure to ignition system primary voltage. It is advisable
to replace such sensors.
c.) If it becomes necessary to check sensor to panel wiring with an ohmmeter or other
checker, first DISCONNECT the plug-in terminal strips from the back of the Annunciator
Unit. Applying voltage to the annunciator through the sensor leads may damage the
device. In addition, the area should be tested as non-hazardous before such testing
commences.
3.5 For the -U version, connect the annunciator unit to the 672169-1 terminal modules using
693115-x cables with standard DB-25 connectors. Make sure the cables are securely
connected.
WARNING REGARDING OLDER ALTRONIC OVERSPEED DEVICES:
If retrofitting into an older panel, the DD-40NTS annunciator will not recognize the output
signal from older Altronic overspeed devices:
DTO-1000, DTO-1010, DTO-2200, DTO-3200
DTHO-2100, DO-3300, PTO-2100, PTHO-2100
These devices will NOT work for overspeed protection in conjunction with a DD-40NTS
annunciator. For such protection, use the overspeed feature built into the DD-40NTS
annunciator (refer to section 6.3).