IMPORTANT
Be sure to read and understand the entire
instruction manual before installing, operating or
servicing the gas detection equipment.
WARNING
Do not open the transmitter enclosure with power
applied unless it is verified that no combustible
gases or vapors are present. A portable gas
detection instrument should be used to ensure that
the area is clear of any combustible gases.
Calibration or maintenance should not be
performed if there is any indication of the presence
of combustible gas at the sensor.
WARNING
It is possible for the transmitter output to drop to a
low LFL level after going into high alarm and still
have a dangerous level of combustible gas
present. Therefore, precautions should be taken to
ensure that the combustible gas has been cleared
before considering the area safe.
WARNING
The sintered metal flame arrestor is an integral part
of the combustible gas sensor. DO NOT operate
the gas detector if the flame arrestor is damaged or
missing, since the exposed element is a potential
ignition source.
CAUTION
The sensor threads should be coated with silicone
free grease (part number 102868-001) to ease
both the initial installation and future replacement
of the sensor. The junction box cover threads
should also be lubricated. The use of other
lubricants is not recommended, since some
materials can cause irreversible damage to the
sensing element. Silicone based lubricants must
never be used.
CAUTION
The wiring instructions in this manual will provide
safe and proper functioning of the device under
normal conditions. However, local variations in
wiring codes and regulations exist, and total
compliance with these ordinances cannot be
guaranteed. Be certain that all wiring complies
with the IEC/NEC as well as all local ordinances. If
in doubt, consult the local authority having
jurisdiction before wiring the system.
NOTE
Throughout this manual, the device receiving the
output signal from the transmitter will be referred to
as the “controller.” A typical controller provides a
visual display of the % LFL output from the
monitored transmitter, indicators for alarm and
trouble conditions, and outputs for controlling
response devices. Other control systems are also
compatible with the Model 505.
INSTRUCTIONS
Combustible Gas Transmitter
Model 505
©Detector Electronics Corporation 2003 3/03 95-8472-01
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