Rp14A Gas Withdrawl Warming Coil R/R (H300); Rp14B Gas Withdrawl Warming Coil R/R (H850); Rp15A Vent Valve Assembly R/R (H300) - CAIRE HELiOS Plus Technical & Service Manual

XI
Troubleshooting & Repair Procedures
RP14A – Gas Withdrawal Warming Coil R/R (H300)
1. Remove the covers (RP4).
2. Use an adjustable wrench to hold the R/E valve inlet arm
(with the SRV) stationary. Use a 7/16 inch open-end
wrench to remove the gas withdrawal warming coil com-
pression nut from the R/E valve fitting.
CAUTION: Be careful not to dent the top of the container when
performing the following step.
3. Use an adjustable wrench to hold the vent valve mounting
block on the top of the container stationary. Use a 7/16 inch
open-end wrench to remove the remaining gas withdrawal
coil compression nut from the mounting block fitting.
4. Pull the ends of the gas withdrawal coil from their fittings
and remove the coil.
5. Replace the gas withdrawal coil by reversing steps 1-4.
RP14B – Gas Withdrawal Warming Coil R/R (H850)
1. Remove the covers (RP4).
2. Remove the flexible urethane tube from the barbed fitting on
the R/E valve outlet arm.
3. Cut and remove the two zip ties that secure the liquid with-
drawal coil to the gas withdrawal coil at the top of the cryo-
genic container.
4. Use an adjustable wrench to hold the R/E valve inlet arm
(with the SRV) stationary. Use a 7/16 inch open-end wrench
to remove the gas withdrawal warming coil compression nut
from the R/E valve fitting.
Figure 35: Removing the Compression Nut
5. Use a 7/16 inch open-end wrench to hold the manifold block
on the top of the container stationary. Use a 7/16 inch open-
end wrench to remove the remaining gas withdrawal coil
compression nut from the manifold block.
6. Remove the ends of the warming coil from their fittings.
7. Remove the gas withdrawal coil by pulling it up and out of
the liquid withdrawal warming coil.
8. Replace the gas withdrawal coil by reversing steps 1-7.
RP15A – Vent Valve Assembly R/R (H300)
1. Remove the covers (RP4).
2. Disconnect the flexible vent tube from the barbed fitting at
the vent valve outlet.
3. Hold the vent valve large hex nut stationary using a 5/8 inch
open-end wrench and loosen the jam nut that holds the vent
valve to the mounting bracket using a 11/16 inch open-end
wrench.
jam
nut
Figure 36: H300 Vent Valve Removal
4. Remove the two vent valve screws and lock washers using a
7/64 in hex wrench.
5. Slide the vent valve out of its mounting bracket.
6. Replace the vent valve assembly by reversing steps 1-5.
HELiOS Portables Technical Service Manual • PN 20562190 Rev E
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