Maintenance and Service 21
16. To adjust the VENT valve, follow Steps 3 and 4 above.
17. Close the
COARSE valve by turning the COARSE knob (*2) clockwise.
18. Close the
VENT valve knob insert (4) clockwise until slightly snug.
19. With the supply pressure at 100% of full scale, open the
COARSE valve until the indicated pressure
stabilizes and then close the COARSE valve.
20. Slowly turn the
VENT valve knob insert (4) counter-clockwise until the display starts to decrease, then
turn the knob insert (4) slightly until the indicated pressure stops decreasing.
21. Follow steps 10 through 15 replacing the term
COARSE valve with VENT valve. The VENT valve is now
adjusted.
4.2.11 Pressure Limit Control (Standard Pneumatic), Regulator Removal
Tools required: Phillips screwdriver
7/16" open end wrench
9/16" open end wrench
A/R 1/4" wide Teflon tape, (PN 60575)
A/R 1/2" wide Teflon tape, (PN 60911)
1/2" socket
socket wrench
1/4" hex wrench
NOTE: See Figure 4-2 on page 35 for additional parts information.
1. Vent any remaining gas from the nitrogen cylinder to atmosphere. Disconnect the power cord from the
power source.
2. Remove front panel from its enclosure as described in Section 4.2.1 on page 14, and carefully place on a
bench top.
3. Remove regulator knob cap and the two screws that secure the round plate.
4. Loosen and remove the locknut using a 1/2" socket while holding the knob. Remove the knob by turning
counter-clockwise
5. Remove all tubing sections that connect to the regulator inlet and outlet fittings.
6. Loosen the mounting collar in the panel rear using a 1/4" hex wrench.
7. Remove the regulator by sliding out from the panel rear.
8. Mount the regulator in a bench vise by the flats in the base.
9. Note the orientation of the inlet and outlet fittings in the regulator. Remove the fittings and any remnants
of Teflon tape from the pipe threads.
4.2.12 Pressure Limit Control (Standard Pneumatic), Regulator Installation
Tools required: Phillips screwdriver
7/16" open end wrench
9/16 " open end wrench
A/R 1/4" wide Teflon tape, (PN 60575)
A/R 1/2" wide Teflon tape, (PN 60911)
snoop, liquid leak gas detector (PN 64781)
1/2" socket
socket wrench
NOTE:
See Figure 4-2 on page 35. Call CONDEC for replacement part numbers.
1. Wrap two layers of Teflon tape on the pipe threads of each fitting and install into the inlet and outlet of
the regulator and ensure that each is oriented properly. Use a bench vise when doing this.
Insert the new regulator into the panel through hole. Pass the adjusting end through the mounting ring.
NOTE: Do not tighten cap screw until adjusting knob is installed.
2. Install the tubing sections to the inlet and outlet fittings.
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