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Cod. 710.0138.72.00 Rev.10 

– 02.2022 

© Copyright 2022 Gardner Denver - All rights reserved

                  

  3 

– 11

 

 

 

 

 

 

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.  Do not operate the dryer at pressures in excess of its rating. 

8.  Do not operate the dryer without guards, shields and screen in place. 

9.  Inspect unit daily to observe and correct any unsafe operating conditions. 

2. INSTALLATION 

2.1 ACCEPTANCE  AND HANDLING 

Upon receiving your Gardner Denver air dryer, please inspect the unit closely.  If rough handling is detected, please note it on your 
delivery receipt, especially if the dryer will not be uncrated immediately. Then obtain the freight carrier's signed agreement to any noted 
damages:  this is a precondition for any insurance claims by the customer. 

It is mandatory to keep the dryer always in vertical position, as indicated by the symbols present on the packaging. For handling, use 
devices having sufficient capacity for the weight of the machine. 

Remove the packaging after having positioned the dryer in the installation site. For unpacking, refer to section 2.3. 

Under no circumstances should any person attempt to lift heavy objects without proper lifting equipment (i.e., crane, hoist, slings or fork 
truck). Lifting any unit without proper lifting equipment, may cause serious injury. Use fork lift channels where provided. 

2.2 STORAGE AND INSTALLATION LOCATION 

If not in use, the dryer can be stored in its packaging in a dust free and protected site between 32°F (0°C) and 120 °F (50 °C), and a 
specific humidity not exceeding 90 %. Should the stocking time exceed 12 months, please contact your local Gardner Denver authorized 
distributor. 

 

 

If the dryer is not used, it will be placed in a site with the following conditions: 

 

 

The machine must be protected from atmospheric agents and not directly exposed to sun light. 

 

A seating base flat and capable to hold the weight of the machine. 

 

Ambient temperature complying with the nominal data of the dryer. 

 

The dryer should be located in a clean area, without forced air draft that can affect the fan control system. 

 

Make sure to leave sufficient clearance (20 inches, 500 mm) around the dryer in order to allow an adequate cooling 
of the machine and for maintenance and/or control operations. 

 

The incoming air must be free from smoke or flammable vapours which could lead to explosion or fire risks. 

2.3 UNPACKING 

The packaging is made of carton or of cellophane. We recommend that you keep the original packaging for the device in case it has to 
be transported to another location or sent to a service center. Dispose the various packaging materials in compliance with the relevant 
rules locally in force. 

 

 

unpack the device, removing the strapping from the carton. Always wear safety gloves when using scissors or other tools to cut 
the straps or the cellophane; 

 

remove the carton or the cellophane; 

 

in case it’s necessary another handling of the device, refer to section 2.1; 

 

remove the pallet (if present); 

 

remove the operating manual, accessories and key from the device. 

 

 

 

 

 

Summary of Contents for GDD4F

Page 1: ...02 2022 Copyright 2022 Gardner Denver All rights reserved 1 10 DIRECT EXPANSION COMPRESSED AIR DRYERS Operators Manual GDD4F GDD7F GDD9F GDD12F GDD18F GDD24F GDD30F GDD37F GDD43F GDD50F GDD60F GDD80F...

Page 2: ......

Page 3: ...lation 4 3 START UP 3 1 Control panel 4 3 1 1 Keys function 5 3 1 2 Condensate discharge parameters programming 6 3 1 3 Anomaly warning 6 3 1 4 Remote signalling alarm 7 3 2 Before start up 7 3 3 Star...

Page 4: ...Cod 710 0138 72 00 Rev 10 12 2021 Copyright 2021 Gardner Denver All rights reserved...

Page 5: ...o the risk of electric shock Condensate drain point Rotation direction of the fan Pay particular attention to the risk of moving parts Explosion risk Lifting point Don t lift from this point Attention...

Page 6: ...re enters counterflow the initial air air exchanger and it is reheated by the inlet hot air with the consequence of energy recovering and also reduction of the relative humidity contained in the outf...

Page 7: ...attempt to lift heavy objects without proper lifting equipment i e crane hoist slings or fork truck Lifting any unit without proper lifting equipment may cause serious injury Use fork lift channels wh...

Page 8: ...isolation switch if present The control panel will show the message OFF indicating that the line and control voltages are available Start sequence The dryer will initially start by pressing and holdi...

Page 9: ...t point it increases the displayed value of one unit per second during the first 10 seconds than of one unit every 0 1 sec ON OFF Pressed it activates or deactivates the dryer When the dryer is deacti...

Page 10: ...the dryer WARNING FOR USER IT S FORBIDDEN TO ATTEMPT TO MODIFY THE OTHER CONFIGURATION PARAMETERS OF THE ELECTRONIC CONTROLLER WITHOUT AUTHORIZATION AND COLLABORATION OF Gardner Denver S AUTHORIZED DI...

Page 11: ...ng the first working hours 3 3 START UP The operations specified below must be performed after the first start up and at each start up after a prolonged inactive period of time due to maintenance oper...

Page 12: ...ryer Replace elements as needed YEARLY OR EVERY 2000 HOURS OF OPERATION Check if the flexible tube used for condensate drainage is damaged and replace it if necessary Check if all connecting pipes are...

Page 13: ...essure switch Reset the high pressure switch Problems with cabling or with the electronic control board Check the cabling and the electronic control board if the trouble persists replace them Activati...

Page 14: ...xtremely delicate Do not remove the probe from its position In case of any kind of problem please contact your local Gardner Denver distributor Pic 3 drain solenoid valve When it is necessary Clean th...

Page 15: ...y mains 4 3 DECOMMISSIONING All work on the dryer may only be carried out by specialist personnel Follow this procedure if you need to shut down the dryer Stop the device and permanently isolate it fr...

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