1
OPERATING AND MAINTENANCE MANUAL
- Contents
NRC0020-0200 UL
The data in this manual are not binding and may be changed by the manufacturer without notice.
Reproduction of this manual, even partial, is strictly prohibited.
C
ONTENTS
C
ONTENTS
......................................................................................................................................................................................... 1
Chapter 1
G
ENERAL
I
NFORMATION
.................................................................................................................................................................. 2
Chapter 2
S
AFETY
............................................................................................................................................................................................... 4
2.1
General ..............................................................................................................................................................................................................4
2.2
General precautions...........................................................................................................................................................................................4
2.2.1
Type of compressed gases to be dried ................................................................................................................................................. 4
2.2.2
Precautions during lifting and transport ............................................................................................................................................ 4
2.2.3
Precautions to be adopted during installation and operation ............................................................................................................ 4
2.2.4
Precautions for maintenance and repair ............................................................................................................................................ 4
2.3
Refrigerant gases ...............................................................................................................................................................................................5
2.3.1
Characteristics of R134a refrigerant .................................................................................................................................................. 5
Chapter 3
T
ECHNICAL
DATA
.............................................................................................................................................................................. 6
3.1
Data plate and meaning of abbreviations ..........................................................................................................................................................6
3.2
Performance data...............................................................................................................................................................................................6
3.2.1
Sound Level Measurements ................................................................................................................................................................. 6
Chapter 4
D
ESCRIPTION
..................................................................................................................................................................................... 7
4.1
Operating principle............................................................................................................................................................................................7
4.2
Air and refrigerant circuits ................................................................................................................................................................................7
4.2.1
Air circuit ............................................................................................................................................................................................ 7
4.2.2
Refrigerant circuit ............................................................................................................................................................................... 7
Chapter 5
I
NSTALLATION
................................................................................................................................................................................... 8
5.1
Location.............................................................................................................................................................................................................8
5.2 Piping
..
...............................................................................................................................................................................................................8
5.3
Electrical connections........................................................................................................................................................................................9
Chapter 6
S
TART
-
UP
......................................................................................................................................................................................... 11
Chapter 7
I
DRY E
LECTRONIC
C
ONTROLLER
................................................................................................................................................ 12
7.1
User interface ....................................................................................................................................................................................................12
7.1.1
Display .............................................................................................................................................................................................. 12
7.1.2
Buttons ............................................................................................................................................................................................... 12
7.1.3
Icons .................................................................................................................................................................................................. 13
7.2
Main functions...................................................................................................................................................................................................13
7.2.1
Unit start-up ...................................................................................................................................................................................... 13
7.2.2
Unit shutdown ................................................................................................................................................................................... 13
7.2.3
Condensate drain test ........................................................................................................................................................................ 13
7.2.4
Dual set point management ............................................................................................................................................................... 13
7.2.5
Digital input ...................................................................................................................................................................................... 14
7.2.6
Compressor operating hours alarm .................................................................................................................................................. 14
7.3
Programming .....................................................................................................................................................................................................15
7.3.1
Editing parameters PR1 .................................................................................................................................................................... 15
7.3.2
Keypad lock/unlock function ............................................................................................................................................................. 15
7.4
Description of settings and parameters .............................................................................................................................................................15
7.5
Alarms ...............................................................................................................................................................................................................16
7.5.1
Alarm display .................................................................................................................................................................................... 16
7.5.2
High and low temperature alarm memorization ............................................................................................................................... 17
7.5.3
Serial line for monitoring systems ..................................................................................................................................................... 17
Chapter 8
S
AFETY
PRESSURE
SWITCH
/ C
ONDENSATE
DRAIN
....................................................................................................................... 18
8.1
High pressure switch HP ...................................................................................................................................................................................18
8.2
condensate drain ................................................................................................................................................................................................18
8.2.1
Timed condensate drain .................................................................................................................................................................... 18
8.2.2
Capacitive condensate drain ............................................................................................................................................................. 19
Chapter 9
O
PERATION
AND
M
AINTENANCE
................................................................................................................................................... 20
9.1
General operation ..............................................................................................................................................................................................20
9.2
Maintenance ......................................................................................................................................................................................................20
9.2.1
Access to the dryer ............................................................................................................................................................................ 20
9.2.2
Special maintenance of electrical panel (Mod. from NRC0125÷0250 ) ........................................................................................... 20
9.3
Planning of checks and maintenance operations...............................................................................................................................................21
Chapter 10
T
ROUBLESHOOTING
........................................................................................................................................................................ 22
Summary of Contents for NRC0020-0200 UL
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