Condec UPC5110 - Manual (Page 29)

26 UPC5100/UPC5110 Operation & Maintenance Manual
4.2.16 Vacuum Control Regulater (PN 59765) - Removal, Installation and Adjustment
The vacuum control regulator is located furthest from front panel on the chassis. Some vacuum control regulators
have a locking screw in place of pulling knob outward.
Tools required: 7/16" open end wrench
hex wrench (.186")
adjustable wrench
channel locks
Phillips screwdriver
A/R 1/4" wide Teflon tape, (PN's 60575)
snoop, liquid leak gas detector (PN 64781)
Removal:
1. Vent any remaining nitrogen from cylinder to atmosphere. Disconnect power cord from power source.
2. Remove front panel from its enclosure as described in Section 4.2.1 on page 14 and place on a bench top.
3. Note the orientation and remove the tubing sections that connect to the regulator inlet and outlet fittings.
4. Loosen and remove regulator mounting nut from the top of chassis, by using channel locks.
5. Note the orientation, then remove the regulator by sliding out from the bottom of chassis.
6. 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.
Installation:
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.
2. Insert the new regulator into the chassis from bottom and rotate to proper position. Thread and tighten
the mounting nut onto the regulator body from the panel front.
3. Install the tubing sections to the inlet and outlet fittings.
4. Fill the cylinder to approximately 1000 PSIG and check all fittings for leaks. If there are no leaks, fill
nitrogen supply cylinder to maximum pressure. See Section 2.1 on page 4 for cylinder refilling
procedure.
5. Install panel/chassis assembly in its enclosure as described in Section 4.2.1 on page 14
Vacuum Level Adjustment:
Field adjustment may be required at times if there is a large difference in barometric pressure at site.
1. Verify cylinder is filled to a minimum of 500 PSIG. See Section 2.1 on page 4 for cylinder refilling
procedure.
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. Verify COARSE valve and PRESSURE LIMIT MONITOR are closed. To close PRESSURE LIMIT
MONITOR pull regulator knob outward and turn counter-clockwise. When closed, push knob inward.
VENT valve should be left open.
4. Turn the MODE SELECT knob on the front panel to VACUUM position.
5. Turn RANGE SELECT switch to +/- 28 in. Hg.
6. Energize UPC5100/UPC5110 and allow warmup time.
7. Push the ZERO button (less than 5 seconds), then close the VENT valve.
8. Open the COARSE valve completely.
9. Pull VACUUM CONTROL regulator knob outward and turn clockwise to increase vacuum to a
minimum display reading of 27.5. Display will be unstable and a popping sound may be heard. turn knob
approximately 1/4 turn further clockwise to stabilize reading. When completed push knob inward to
lock.
10. Fill the cylinder to approximately 1000 PSIG and check all fittings for leaks. If there are no leaks, fill
nitrogen supply cylinder to maximum pressure. See Section 2.1 on page 4 for cylinder refilling
procedure.