ENMET ISA-44-RALE-OD - Manual (Page 15)

ISA-44RALE-OD/ISA-44RAHE-OD/ISA-44E-OD ENMET Corporation
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PRECAUTIONS:
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Do not drill holes in the enclosures to mount them.
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Use caution with compressed air lines and gas cylinders. High air pressure can cause personal injury, especially
to eyes and ears.
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Be sure to follow all instructions.
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If instrument does not respond as indicated, contact ENMET personnel.
♦
Follow all electrical codes to meet requirements for explosion-proof rating.
♦
Do not blow cigarette smoke on a sensor.
MATERIALS: ISA-44RALE-OD
q
Appropriate hardware to hook-up air line to sample head assembly. Assembly has Hansen #10 ( ½" NPT)
Push-type plug; uses Hansen series 1000 brass coupler or equivalent.
q
Mounting tools and hardware
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110 V AC
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Power supply line (supply explosion proof fitting for conduit entry into control unit)
PROCEDURE:
W ARNING : Area must be declassified during installation.
1. Before installation, flush the area with clean air or test the area with a portable gas detector to make sure the
atmosphere is not combustible. Then mount the control unit with appropriate hardware.
2. Remove the bolts on top of the terminal enclosure and remove the cover to access the terminal blocks inside.
3. Attach power line (make sure it is not live; power should be applied only at step 8 of this procedure) to the
appropriate terminals in the terminal enclosure. See Wiring information given in Table 3. Use an explosion proof
fitting when connecting this wiring to the enclosure. See Wiring Information table for connections.
4. If the relay contacts are to be used, utilize the appropriate terminals given in the wiring table.
ISA-44RALE-OD
5. Attach the sample head assembly to the compressed air line. Adjust the knob on the air pressure regulator until the
air pressure gauge reads between 5 and 10 PSI.
6. Unscrew the bottom of the humidifier (bubbler) of the sample head assembly, and fill the bubbler to the mark with
clean water. Reinstall bottle.
7. Make sure clean air from the compressed air line flows continuously through the sample head assembly (through
bubbler and over the sensors). If you suspect contaminated air in your line, use bottled air. Do not operate the
instrument without air flowing through the sample head assembly. If you apply compressed air to the sample
head, and air does not flow, the orifice may be plugged. Replace it by unscrewing the regulator and then
unscrewing the orifice from the humidifier (bubbler). See Section 8.0 for replacement part numbers.
8. Unscrew the cover of the oxygen cell housing. Remove the oxygen cell from its protective package. Using wire
cutters, clip off approximately ½ of each pin on the back of the new cell. Plug the cell into the circuit board and
place the cell into the clips. Take precaution not to damage the thermsistor on the circuit board. Replace cover.
9. Apply 110 V AC power to the appropriate terminals in the terminal enclosure if supplied or the terminal plate in the
control unit.
NOTE: If applicable, turn HORN off.
10. Set the Purge/Operate/Horn-off switch to PURGE (if applicable).