Condec UPC5110 - Manual (Page 30)

Maintenance and Service 27
11. Install panel/chassis assembly in its enclosure as described in Section 4.2.1 on page 14
4.2.17 Inlet Check Valve, Nitrogen Fill Port (PN 60263) - Removal, Disassembly and Installation
Remove the check valve if it does not hold the pressure of the N
2
cylinder. The check valve can be disassembled
for cleaning should any debris foul the seat area.
Tools required: Phillips screwdriver
7/16" open end wrench
9/16" open end wrench
A/R 1/2" Teflon tape, PN 60911
hex wrench (5/32")
tube fluorinated Krytox grease (PN 55593)
A/R solvent (de-natured alcohol)
snoop, liquid leak gas detector (PN 64781)
torque wrench
NOTE: See Figure 4-4 on page 35 .
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. Loosen and remove the tubing end nuts from the fill port tube connector fitting (PN 59760) and chassis
mounted regulator tee fitting (PN 59727).
4. Remove the fill port tube connector fitting (PN 59760) from the check valve.
5. Remove the check valve from the fill port fitting. Remove any remnants of Teflon tape from the pipe
threads. Note direction of flow arrow.
Disassembly:
1. Remove lock screw from the inlet end (tail of flow arrow) using a 5/32" hex wrench.
2. Remove the insert, O-ring, poppet, and spring and clean in solvent. If any damage to O-ring is noticed,
replace O-ring (PN 66654). Blow-dry parts before reassembly.
3. Apply a small amount of fluorinated Krytox grease on both sides of O-ring (PN 66654)
4. Reassemble the check valve per as shown in Figure 4-4 on page 35.
5. Torque insert lock screw to 85 in. lbs.
Installation:
1. Wrap two turns of Teflon tape on the check valve threads.
2. Install the inlet end (end opposite direction flow arrow is pointing) of check valve into the fill port fitting
and tighten until snug.
3. Install the other end of the check valve into the fill port tube connector fitting.
4. Install and tighten the tubing end nuts to the fill port tube connector fitting (PN 59760) and chassis
mounted regulator tee fitting (PN 59727).
5. 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.
6. Install panel/chassis assembly in its enclosure as described in Table 4.2.1 on page 14.
4.2.18 AC Fuse (PN 58076) - Removal and Installation
1. Disconnect the power cord from the power source and line filter. Remove the fuse holder at AC INPUT .
2. Inspect fuse. If blown, replace with 1/4 Amp 250 Volt, 20mm x 5mm diameter (PN 58076).
3. Replace the fuse holder at AC INPUT .