Cryomech LNP-40, Инструкция по установке, эксплуатации и текущему обслуживанию

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Installation
6-8
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.
•
The N
2
generator/filter bank panel is wall mountable. A minimum clearance of 5
inches (13 cm), measured from the bottom edge of the panel to the floor, is
suggested in order to service the filter bank.
•
Locate the N
2
generator/filter bank panel within 10 ft (3 m) of the dewar. If greater
separation is required a longer nitrogen flex line will be needed.
•
The automatic drain valve (ADV) should be wired directly into an unswitched wall
outlet or other suitable power source. The ADV is designed to operate whether or not
the helium compressor package is running. The electrical requirements for the ADV
are called out on a tag attached to the ADV’s cord.
•
The timer on the ADV can be set to cycle every 1 to 45 minutes. The drain opening
can be set for 1 to 15 seconds each cycle. To minimize air losses, the timer should
be adjusted to open the port just long enough to discharge any accumulated
condensate. The timer is properly set if nothing but air vents at the end of the open
period.
•
If needed, connect a drain line to the ADV. Extend tubing or piping away from the unit
to provide safe and convenient removal of excess moisture. The ADV outlet port is
equipped with a 3/8" compression fitting.
CAUTION
Do not apply heat to the automatic drain valve. Doing so will damage or destroy the
drain valve.
•
If the N
2
generator/filter bank panel is equipped with the optional dehumidifier and
needle valve, make certain the needle valve is closed.