Great Lakes Air Products ERF SERIES Owner's Manual

Great Lakes Air Products Inc.

5861 Commerce Drive

Westland, MI 48185

PH: 734-326-7080

FX 734-326-5910

www.glair.com

REFRIGERATION COMPRESSED AIR DRYER

ERF SERIES NON-CYCLING

OWNER / OPERATOR MANUAL

Introduction --------------------------------- Page 2
General safety & warnings --------------------------------- Page 2
Proper use of the dryer --------------------------------- Page 3
Receiving equipment --------------------------------- Page 3
Installation, Location and piping --------------------------------- Page 3
Recommended System design --------------------------------- Page 4
Condensate drain --------------------------------- Page 4
Electrical connection --------------------------------- Page 5
Start up procedure --------------------------------- Page 5
Shut down Procedure --------------------------------- Page 5
Required Maintenance --------------------------------- Page 6
Capacity Correction --------------------------------- Page 6
Troubleshooting --------------------------------- Page 7
Engineering Data --------------------------------- Page 8
Electrical Schematics See GRF/ERF Electrical Addenum

Great Lakes Air Products ERF Series Refrigeration Dryers

Effective for equipment manufactured 01/01/2010

DEFINITION OF THE SIGNS USED IN THIS MANUAL

Before attempting any installation or maintenance on the dryer, read carefully the
instructions reported in this manual.

General warning sign. Risk of danger or possibility of damage to the machine. Read
carefully the text related to this sign.

Electrical hazard. The relevant text outlines conditions, which could result fatal. The
related instructions must be strictly respected.

Danger hazard. Part or system under pressure.

Danger hazard. Its absolutely forbidden breathing the air treated with this apparatus.

INTRODUCT

This manual contains information and recommendations for installing, and operating, standard non­cycling Refrigeration Air Dryers.

Direct any question to the nearest equipment distributor. Always specify the model number, serial

number, refrigerant type, and gauge readings during operation.

Replacement and maintenance parts along with any questions related to systems or installations should
be directed to your local Great Lakes Air distributor. If local distributor is unknown, contact the Great
Lakes Air @ 734-326-7080 for your local distributor.

Prior to performing any warranty service on Great Lakes Compressed Air Dryers, an authorization number
must be obtained from the service department. Have model number, serial number, and brief
description of warranty issue available for your service representative. Failure to obtain service
authorization number will void equipment warranty.

The information, specifications in this manual are in accord with the information in effect at the time of
printing. The manufacturer reserves the right to make changes without notice or incurring obligation.

GENERAL SAFETY WARNINGS

Compressed air is a highly hazardous energy source. Never work on the dryer with parts
under pressure. Never point the compressed air or the condensate drain jet towards
anybody. The user is responsible for the installation of the dryer, which must be executed
on the basis of this manual. Otherwise, the warranty will be voided and dangerous
situations for the personnel and/or damages to the machine could occur.

Only qualified personnel can use and service electrically powered devices. Before
attempting any maintenance action, the following conditions must be satisfied:

• Be sure that the voltage is disconnected before any work is performed.

• Be sure that any part of the dryer under pressure cannot be connected to the

compressed air system.
Any change to the machine or to the relevant operating parameters not previously

authorized by the manufacture, creates the possibility of dangerous conditions, and will
void the warranty.

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Great Lakes Air Products ERF Series Refrigeration Dryers

Effective for equipment manufactured 01/01/2010

PROPER USE OF THE DRYER

This dryer has been designed, manufactured and tested to separate the humidity normally contained in
compressed air only. Any other use has to be considered improper. The manufacturer will void the
warranty and not be held responsible for any problem arising from improper use. The correct use requires
adherence to installation conditions specified in this manual. THIS UNIT IS NOT DESIGNED FOR

RESIDENTIAL USE.

This dryer is supplied tested and fully assembled. The only operation left to the user is the connection to
the plant in compliance with the instructions given in the following chapters.

The purpose of the machine is the separation of water and eventual oil particles present
in compressed air. The dried air cannot be used for respiration purposes or for
operations leading to direct contact with foodstuff without proper filtration per local and
federal regulations. Please consult your distributor for further information.

RECEIVING EQUIPMENT

Immediately upon receipt of equipment, remove all crating and packaging around equipment. Examine
machinery for any damages either external or internal that may have occurred in transit.

If there is any physical damage or a refrigerant leak, (suction/analyzer gauge reads zero) please note
all damages on bill of lading during delivery or file claim immediately with shipper if damage is detected
after delivery. Ask for a local terminal phone number to report all damages to the Transportation
Company. The carrier is legally responsible for any damages, since the unit is shipped F.O.B.

INSTALLATION LOCATION AND PIPING

Particular care is required in selecting the installation site, as an improper location could
jeopardize the proper operation of the dryer. This unit is not suitable to be used in an
explosive atmosphere, or where the risk of fire could be present.

The unit should be installed in an area that is clean and dry, allowing sufficient space on all sides for
routine maintenance and service. It should be located on a level floor or shelf free from vibrations and
sufficient to support the total weight of the machinery. Although the dryer package is a freestanding unit,
it may be secured by bolting the base to the floor but is not required. This standard dryer is designed
for indoor installation. Contact distributor if installing unit outdoors.

Installations at altitudes above 4000 feet (1219 meters) may require adjustments. The unit has been
factory adjusted to operate up to 4000 feet (1219 meters), and if installation is above this altitude, contact
the factory service department for correct refrigerant settings.

Air-Cooled Units

Position the unit to permit free circulation of cooling air to the dryer. All the free air vents on the dryer
must be two feet, minimum from obstructions preventing flow to and from the unit. The unit should be
shielded from direct sunlight, weather elements, and hot discharge air from other air-cooled equipment.
The ambient temperature around the dryer must not exceed 100°F (37.7°C) or be less than 50°F (10°C).

Ambient temperatures below 50°F (10°C) require optional equipment specified below.
Sufficient ventilation must be provided to maintain acceptable ambient for efficient operation. Consider
heat rejection when locating dryer.

Water-Cooled Units

The fluid coolant temperature supplied to the refrigerant condenser must not exceed 90°F(32.2°C). The
fluid supply lines to the condenser should be sized to deliver the required flow of coolant. If the ambient
temperature exceeds the supply fluid temperature by 10°F, insulate the inlet line to the condenser. For

maximum efficiency filter with 20 mesh strainer and treat the fluid supply to the condenser.

STARTUP PROCEDURE WATER COOLED

The unit is supplied with a water-regulating valve at the outlet of the refrigeration condenser. This valve
modulates water flow to maintain a stable refrigerant discharge pressure of 250-275 PSIG for R-404a
units and 125-145 PSIG for R-134A units. If the refrigeration discharge pressure maintains a pressure
above or below this setting, adjustments will be required to the water-regulating valve. Contact a qualified
refrigeration service technician or the Great Lakes Service Department.

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