Metal O Seals; Using Gauge Manifolds; Access Valve - Telemark Cryogenics 1200 Instruction Manual

Telemark Cryogenics Microprocessor Based Cr T
CAUTION - HOT SU SURFACE
High temper peratures are generated during normal operation.
contact with ith exposed pipe-work as this can get hot during n
operation.
CAUTION - COLD S SURFACE
Freeze Burn urn Risk. Very low temperatures generated during
operation. A . Avoid contact with exposed pipe-work.
2.6.1 Using new silv ilver plated "O" seal (supplied in accessory Kit), c
inset the "O" ri " rings and mate the refrigerant line connection to
corresponding ng fitting. The "Coil In" (CI) is a ½" metal seal m
fitting (from the the unit to the Meissner coil) and the "Coil Out" (C
½" metal seal female fitting (from the Meissner coil to the unit)
Hand-tighten t n the nuts to ensure that the "O" seal is not displac
damaged durin ring the installation process. It is our recommend
coupling fitting ings are fully tightened. Installation engineers mu
a torque of 70 70 ft/pounds (85-90nn) on the couplings to minimiz
possibility of le f leaking.
2.6.2 Using a set of of Refrigerant Manifold gauges as shown below (
connect inlet s side of the manifold (centre (yellow hose) to a bo
dry Nitrogen o or Argon and the high pressure outlet side of the
(red hose) to th o the units access valve (see fig 7).
Fig 8 8 Refrigerant Manifold
2.6.3 Open the acce cess hand valve (see fig 7) and pressurise the lin
200 PSIG (13. 3.78Bar (1.78Mpa)). Using a suitable liquid leak
medium (soap apy water) check the connections at both the Meis
and the Cryoc ochiller ends for signs of leakage. The lines shou
pressurised fo for at least 15 minutes while inspection is checke
Note: When pressurising the lines, DO NOT
the balance pressure of the unit.
Page 22 of 63
Cryochillers
n. Avoid
g normal
ring normal
, carefully
to the
male
(CO) is a
nit).
laced or
ndation that
must apply
mize the
(fig 8)
bottle of
he manifold
Fig 7 Access ss Valve
lines to
k detection
eissner coil
ould be
ked.
exceed
Revision ion 1.0.7 October 2018