Cryomech LNP-40, Installation, Operation And Routine Maintenance Manual

Page: 63 / 102

Installation
6-13
Figure 6-5: Dryer inlet and outlet ports
Refer to the following section for instructions on attaching the copper tubing to the inlet
and outlet ports’ compression fittings.
6.8 Air compressor to N
2
generator/filter bank panel connection
The outlet port of the air compressor is connected to the inlet port of the filter bank panel
with the 50 ft (15 m) roll of 3/8” OD copper tubing supplied with the air compressor. To
aid in the cooling of the compressed air and condensing the moisture entrained in it,
Cryomech recommends using the entire length of copper tubing to connect the air
compressor to the N
2
generator/filter bank panel.
The filter bank's ability to remove water from the incoming compressed air is dependent
on the temperature of the incoming air. The incoming air must be cool enough to allow
the water vapor to condense. Once condensed, the first two filters will remove it.
As a rule, the incoming compressed air temperature should be within 10
°
F (6
°
C) of the
ambient temperature for optimal operation of the compressed air filter bank.
If the incoming air is too warm, water vapor passes through the first two filters and
condenses out in the carbon filter and after filter. Eventually, the moisture enters the
nitrogen generator and the dewar causing a significant drop in LN
2
production. Over time,
an accumulation of ice will completely block the flow of gaseous nitrogen into the dewar.
The system will continue to operate however; it will not produce any LN
2
.
CAUTION
The compressed air filters are not designed to remove vaporous water. Vaporous
water will pass through the filters and damage the N
2
generator. This type of damage
is not covered under the warranty.
CAUTION
The maximum inlet air temperature to the N
2
generator /compressed air filter bank
panel is 125
°
F (52
°
C). Temperatures above 125
°
F (52
°
C) will damage the filter bank
components. This type of damage is not covered under the warranty.
Inlet port Outlet port