MAX300-RTG : Hardware Manual Hardware Maintenance
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Data System
Data system (computer) maintenance consists of file management. The computer
is mounted above the electronics chassis within the pressurized enclosure.
Air Conditioner
These units are equipped with an integral climate control system. Air conditioners
are the standard cooling method. Depending upon model, the air conditioner uses
Type R410A or R134A refrigerant. The condensate drain tube is on the rear or the
bottom of the unit, and should be plumbed and routed to an appropriate
atmospheric pressure drain. The air conditioner is equipped with an internal valve
that allows condensation to drain periodically, therefore a drain trap is not required.
In situations where cooling water is available, a water cooled heat exchanger is
available as an option.
The air conditioner unit on the MAX300-RTG is rated at 5000 to 6000 BTUH,
depending on model. Some models of air conditioners are interlocked with the front
door of the enclosure. If the door is opened while the MAX300-RTG unit is running,
the air conditioner compressor will turn off and the internal fans will remain running.
Caution – open the front door only when the area is known to be non-hazardous.
When the door is closed, the compressor will re-start. Note that if the door is open
for only a short time, it may take a few minutes for the compressor to re-start. The
only regular maintenance required on the air conditioning unit is regular cleaning
of the external air filter to maintain sufficient air flow.
Compressor: Requires no maintenance. It is hermetically sealed and
properly lubricated for years of satisfactory operating service.
Refrigerant Loss: Since this air conditioner is certified for use in hazardous
locations, disassembly will void certification. To maintain certification and
therefore safety, any air conditioner malfunction must be reported to Extrel
CMS Technical Support.
Fans and Motors: All bearings, shafts, etc. are lubricated for the life of the
unit. The condenser blower and the evaporator blower are thermally
protected to prevent over temperature conditions.
Condenser and Evaporator: The coils are constructed of copper tubes
with mechanically bonded aluminum fins, specially coated for corrosion
resistance. While no maintenance is ordinarily required, the fins should be
checked for the accumulation of dirt and debris. Periodic cleaning of dirt and
debris from the outside fin surface may be required to maintain operating
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