Det-Tronics PIRECL Infrared Hydrocarbon Gas Detector PointWatch Eclipse User Manual
Page 65
H-5
95-8526
14.2
switch Access procedure
NOTE
It is strongly recommended to document all PIRECL gas detector network addresses as well as the addresses
of all other LON devices on the Address Identification Chart before disassembling and programming the
PIRECL gas detectors.
Removal of four stainless steel flange bolts and the front electronics module of the PIRECL IR gas detector from the
bulkhead is required in order to gain access to the network address DIP switch. Tools required for this procedure
include a 4mm hex wrench and a torque wrench capable of accurately measuring 40 inch-pounds.
1. Remove 24 Vdc power from the PIRECL detector. Remove the weather baffle from the detector.
2. Remove the four stainless steel flange bolts using a 4mm hex wrench. Take care to properly support the
electronics module as the last flange bolt is removed.
3. Carefully remove the electronics module by extracting it straight out from the bulkhead.
4. Set the network address switches.
5. Ensure that the module O-ring is intact and undamaged.
6. Reinstall the electronics module by inserting it straight into the bulkhead.
NOTE
Take care to properly align the module’s electrical connector with the bulkhead connector before attempting to
fully insert the module. Failure to do so may result in damage to the module and/or bulkhead.
7. Insert and tighten the four flange bolts in an opposing consecutive order in two stages — first partially
tighten all four bolts equally, and then fully tighten each bolt in an opposing order to 40 inch-pounds (4.5
Nm) of torque. (Bolts are M6 per ISO 965 with M5 head, SST with a yield stress of 448 N/mm
2
(65.000 PSI)
minimum.)
8. Apply power after all network addresses have been programmed and all field enclosures are properly
installed.
tYpicAl ApplicAtions
Figure C-3 is a simplified drawing of a typical EQP system. This system includes an EQP Controller, DCIO and various
LON field devices.