Atlas Copco FD850 User Manual

Oil-free Air Division - B-2610 Wilrijk - Belgium
*2920137100*
Instruction book for
Air dryers
FD(W)560, -700, -850, -950,
-1200, -1600
This instruction book meets the requirements for instructions specified by the
machinery directive 89/392/EEC and is valid for CE as well as non-CE labelled
machines
Registration code
Collection: APC FD
Tab: 38
Sequence: 987
No. 2920 1371 00
1997-12
This instruction book applies exclusively to FD560, -700, -850, -950, -1200
and -1600 dryers filled with R404a refrigerant (see data plate)

Atlas Copco FD850 Specifications

General

Brand	Atlas Copco
Model	FD850
Category	Dehumidifier
Language	English

Summary

Leading Particulars

General Description

Air Circuit Details

Refrigeration Circuit

Operating Instructions

Safety Precautions

Emphasizes applying all relevant safety precautions mentioned in the manual.

Initial Start Procedure

Details the procedure for the first startup, including preheating the oil via the crankcase heater.

Standard Starting Procedure

During Operation Checks

Possible Causes of High Dewpoint

Identifies common issues like dryer overload, ambient conditions, or refrigerant problems affecting dewpoint.

Maintenance and Settings

Refrigerant Safety Precautions

Highlights critical safety measures when handling refrigerant R404a, including skin and eye contact.

Automatic Expansion Valve Settings

Switches and Their Settings

Problem Solving Guide

Dewpoint Temperature Problems

Troubleshooting steps for high pressure dewpoint, covering air inlet, ambient, and cooling water issues.

Condenser Pressure Issues

Lists causes and remedies for condenser pressure being too high or too low.

Compressor Operation Faults

Troubleshooting steps for compressor stops or failure to start, including power and protection issues.

High Dryer Pressure Drop

Identifies causes such as clogged strainers or exceeded dryer capacity for high pressure drop.

Condensate Trap Malfunctions

Evaporator Pressure Issues

Covers problems related to evaporator pressure being too high or too low, including valve settings.

Sight-Glass Bubble Interpretation

Principal Data

Limitations and Nominal Conditions

Specific Model Data