HELiOS Portables Technical Service Manual • PN 20562190 Rev E
32
HELiOS P
or
tables
Troubleshooting & Repair Procedures
XI
NOTE: When assembling new compression fittings, tighten
1/8”, 1/4” and 1/2” nuts eight flats past finger tight and 3/16”
nuts five flats past finger tight. When reassembling previously
used compression fittings, tighten nuts one to two flats past
finger tight.
CAUTION: When replacing components, make sure the new
part is oriented exactly the same as the original part prior to
installation.
WARNING:
The manufacturer of Fluorolubricant warns users
not to allow Fluorolubricant to contaminate tobacco products.
Wash Fluorolubricant from hands before smoking.
NOTE: When replacing components with pipe threads, use
PTFE tape thread sealant. Apply two rounds of PTFE tape to
threads near end of component, avoiding first thread.
WARNING:
Do not use glue type thread locking compounds
or unapproved sealants on any repairs.
NOTE: All replacement parts must be factory approved,
cleaned for oxygen service, and stored in sealed plastic bags.
The repair area must be clean and separate from other areas.
Room air should be filtered, and free from dust, soot, and other
contaminants.
WARNING:
Parts that are welded in place must not be
replaced in the field. Should these parts fail, return complete
assembly or sub-assembly to factory for repair. DO NOT use
solder or silver solder to repair broken welds.
CAUTION: Some components require a specific amount of
torque when assembling. Follow torque requirements where
specified.
RP1 – General
The following procedures have been carefully prepared to allow
proper removal and replacement of defective components and
should be used in conjunction with the Troubleshooting Chart and
the tests in this section.
RP2 – Liquid Leak Detector Test
1. Remove the covers (RP4).
2. Place the cryogenic container assembly on a portable test
fixture (B-778202-00). Stand the front cover, with the tub-
ing still connected, next to the bottle assembly as shown in
Figure 19.
3. Attach a test pressure gauge (B-701732-00) to the top (de-
livery) cannula barb of the unit.
4. Turn the flow control knob to a continuous flow setting
(0.75 on the H300, C6 on the H850)
5. Attach the DISS nut and tailpiece of a HELiOS oxygen sup-
ply line (B-701656-SV) to a 0-6.89 bar (0-100psi) gaseous
oxygen source as shown in Figure 20.
6. Insert the opposite end of the HELiOS oxygen supply line
into the quick connect on the front cover of the H300 or
H850 as shown in Figure 20.
7. Increase the gaseous oxygen source pressure until the test
pressure gauge reads 1.52 to 1.59 bar (22-23 psi).
8. Use a liquid leak detector to test all fittings, connections,
and joints.
Figure 19:
Portable Test Fixture
NOTE: If an adjustable 0-6.89 bar (0-100 psi) gaseous
oxygen source is not available, the H300 or H850 may be
pressurized from a HELiOS reservoir that is at operating
pressure.
NOTE: For newer units manufactured without the CPC
Connector, the CPC Connector Kit will need to be installed,
please refer to RP27.
