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1. GENERAL INFORMATION
1.1 FUNCTIONAL DESCRIPTION
ZEKS refrigerated air dryers remove moisture from compressed air. Moisture is detrimental to pneumatically operated
appliances, controls, instruments, machinery and tools.
Hot compressed air enters the patented aluminum heat exchanger where it is cooled down to the dew point temperature in
two different stages: In the first stage, the precooler/reheater makes use of the colder compressed air exiting counterflow from
the condensate separator to cool the inlet air. In the second stage, the compressed air temperature is further reduced as it
passes through the refrigerant-to-air and glycol chiller. During these two stages almost all the oil and water vapor contained in
the compressed air are condensed to liquid and successively separated from it in the condensate separator, then drained out by
the automatic drain. The cold compressed air then re-enters the precooler/reheater where it is heated before exiting the dryer
for use.
When operating at partial loads, the dryer uses the energy previously stored in the gycol circuit, shuts down the compressor
and substantially saves energy and costs.
This dryer can be easily installed into various pneumatic systems in which dry air is required or desired. Please refer to Start
Up chapter for complete operating details.
The dryer comes provided with all the control, safety and adjustment devices, therefore no auxiliary devices are
needed.
Improper grounding can result in electrical shock and can cause severe injury or death.
This product must be connected to a grounded, dedicated service, permanent wiring system .
All grounding must be performed by a qualified electrician and comply with national and local electrical codes.
In the event of an electrical short circuit, grounding reduces the risk of electric shock by providing an alternate, lower
resistence, route for the electrical current.
Ground must be established with a bare grounding wire sized according to the voltage and minimum branch circuit
requirements.
Ensure good bare metal contact at all grounding connection points, and ensure all connections are clean and tight.
Check grounding connections after initial installation and periodically thereafter to ensure good contact and
continuity has been maintained.
Check with a qualified electrician or service technician if the grounding instructions are not completely understood, or
if in doubt as to whether the product is properly grounded.
1.2 USE OF THE MACHINE IN SAFE CONDITIONS
Because an air dryer is pressurized and contains rotating parts, the same precautions should be observed as with any
piece of machinery of this type where carelessness in operation or maintenance could be hazardous to personnel. In
addition to obvious safety rules that should be followed with this type of machinery, safety precautions as listed below
must be observed.
1. Only qualified personnel shall be permitted to adjust, perform maintenance or repair this air dryer.
2. Read all instructions completely before operating unit.
3. Pull main electrical disconnect switch and disconnect any separate control lines, if used, before
attempting to work or perform maintenance on the unit.
4. Do not attempt to service any part while machine is in an operational mode.
5. Do not attempt to remove any parts without first relieving the entire air system of pressure.
6. Do not attempt to remove any part of the refrigeration system without removing and containing
refrigerant in accordance with the EPA and local regulations.
7. Remove any trace of spilled surface fluids before connecting the dryer to electrical power.
8. Do not operate the dryer at pressures in excess of its rating.
9. Do not operate the dryer without guards, shields and screen in place.
10. Inspect unit daily to observe and correct any unsafe operating conditions.
