USER MANUAL
Series HC
Reference No. 145 Final Rev 5
Page 21
September 2004
SECTION 2:
(Continued)
2.1.1
Mechanical installation
The equipment should be located in an area as practically possible with
adequate clearances for service. An overhead clearance of not less than three
feet above each adsorber tower is required for loading of the desiccant. Access
clearance of three feet in front of the control panel should be provided. Insulate
the pipe between the compressor and dryer to minimize heat loss.
Remove all
protective shipping crates, flange covers, etc.
Utilizing the mounting holes provided on the skid, anchor the
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HC Dryer to a solid, level foundation designed to support the dryer.
Do not hydrostatically test the pressure vessels. All HC dryers’ pressure vessels
are hydrostatically tested at one and one-half times the design pressure after
fabrication and before assembly.
Desiccant is shipped loose (HC-41 and above) and must be installed. Refer to
section 4.2 for installation of desiccant.
If the equipment is installed in a high traffic area, protective barriers may be
required to prevent possible damage of equipment and to prevent contact with
hot surfaces.
Because of vibration during shipping, some tube fittings may have loosened;
therefore, inspect all connections and tighten if required. Also, flange
connections may have loosened; therefore tighten all flange bolts.
Ensure that the inlet and outlet connections to and from the
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HC Dryer are made using the correct rated fittings and piping to meet the design
conditions.
System isolation and by-pass valves should be installed. If not supplied as part
of the equipment package by
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, they should be supplied and installed
by others. It must be verified that these exist, so that future servicing of the Dryer
System may take place.
Full flow relief valves to protect the system from over-pressure must be provided
by others in accordance with local regulations.
The purge exhaust connection on the HC larger dryers may be connected to a
vent header. To ensure satisfactory regeneration of the desiccant chambers is
achieved, the purge exhaust piping should be sized as follows to prevent "back
pressure" build up.
Installed length of exhaust pipe
Pipe size required
Up to 10 Ft
Same size as the dryer exhaust
Up to 25 Ft
One size larger than dryer exhaust
Up to 50 Ft
Two sizes larger than dryer exhaust
Up to 100 Ft
Three sizes larger than dryer exhaust
