KRIWAN INT280-60 User manual

KRIWAN Industrie-Elektronik GmbH · Allmand 11 · D-74670 Forchtenberg · phone [phone] · fax [phone] · e-mail: i[email protected] · home: www.kriwan.com
Technical changes reserved
Product group SEdition: 710.00566.0
INT280-60
®
INT280-60®
INT280-60
Wiring diagram
Dimensions in mm
PE
N
L3
L2
L1
F1 F2 Q1
H1
Alarm
12 345
INT280-60
M
3 AC
169 93.9
29.5
Ø50
Ø47.6
Ø6.7
Ø58.5
112°
90°
34°
45°
60
97
32
111.5 9
Application
The INT280-60 is a further development of the reliable KRIWAN oil level
regulators.
The oil level regulator INT280-60 monitors and controls the oil level in
the refrigerant compressors. The problem of poor oil distribution in
multi-compressor packs has been overcome by actively supplying oil
from the oil reservoir. This minimizes the risk of operating without
enough oil in the compressor.
Functional description
If the oil level is too low, the intelligent filling algorithm controls the oil
refill. To do this, the integrated solenoid valve is opened cyclically.
The oil level regulator switches the compressor off through the internal
relay if the oil level remains too low after an extended period of time. Oil
refilling continues after this.
When the oil level is sufficient the relay tightens, the compressor can
start again.
The reactions are time delayed, to prevent unnecessary switching in
response to temporary fluctuations in the oil level.
The INT280-60 has its own monitoring system of the optical sensor. In
the event of malfunctions or soiling, the relevant warning or error will be
notified.
The integrated LED signals the current status.
For operation in the specified manner, the supply voltage has to be on
permanently on the INT280-60.

KRIWAN Industrie-Elektronik GmbH · Allmand 11 · D-74670 Forchtenberg · phone [phone] · fax [phone] · e-mail: i[email protected] · home: www.kriwan.com
Technical changes reserved
Product group SEdition: 710.00566.0
INT280-60
®
INT280-60®
Installation instructions
• Prior to installation, ensure that the O-ring at the connecting flange is
seated properly.
• There must be no foreign objects in the oil infeed or outfeed area of
the INT280-60.
• The device has to be mounted to the compressor horizontally. It can
be rotated by 180°.
• Use matching washers for the flange fastening screws.
• Oil level regulator is pre-assembled in installation position.
• Manually screw in the screws.
• Afterwards tighten the screws alternating with a torque of 9Nm (M6,
steel 8.8, dry).
• The electrical connection needs to be carried out according to the
wiring diagram.
• For use at low temperatures, an oil sump heater has to be installed,
to ensure trouble-free operation of the INT280-60.
• An oil filter has to be installed in the oil infeed line of the INT280-60,
to prevent the solenoid valve seat from getting dirty.
• Before the refrigerating system is filled with refrigerant, the system
and the connections of the INT280-60 have to be checked for leaks.
The mounting, maintenance and operation are to be carried out
by an electrician. The valid European and national standards for
connectingelectricalequipmentandcoolinginstallationshaveto
be observed.
Connection lines that extend from the terminal box have to
feature at least a basic insulation.
The user has to ensure that the connections are properly tight.
The electrical connection needs to be carried out according to
the wiring diagram.
Prior to installation, ensure that the pressure in the refrigeration
circuit is and stays equal to the atmospheric pressure.
The voltage supply to the INT280-60 must be switched off prior
to installation/connection and the subsequent tasks.
Flash code
The KRIWAN flash code allows for a quick and easy status display and
troubleshooting.
The flash code consists of a cyclical flash sequence (red / orange or
green/ orange).Thecurrent status can be determined from the number
of pulsing flashes.
Overview flash code
Warning
Error
Flash code
Green lit Oil level OK
Green flashing Oil level too low, fill
Green/Orange flashing Warning, see below for description
Red/Orange flashing Error, compressor is switched off; for
description see table below
1st flashing
sequence
(LED green)
2nd flashing
sequence
(LED orange)
Description
1 2 Oil level monitoring:
Soiled optics, stage 1
2 1 General:
Low supply voltage
2 General:
Unexpected filling behaviour
identified
1st flashing
sequence
(LED red)
2nd flashing
sequence
(LED orange)
Description
1 1 Oil level monitoring:
Oil level too low
2 Oil level monitoring:
Soiled optics, stage 2
3 Oil level monitoring:
Internal sensor fault
2 1 General:
Supply voltage too low
3 General:
Internal alarm
4 General:
External alarm
1.5s
Break 1 green / red
(1-5 pulses) Break 2 orange (1-5 pulses) Break 1
0.8s 1.5s

KRIWAN Industrie-Elektronik GmbH · Allmand 11 · D-74670 Forchtenberg · phone [phone] · fax [phone] · e-mail: i[email protected] · home: www.kriwan.com
Technical changes reserved
Product group SEdition: 710.00566.0
INT280-60
®
INT280-60®
Technical specifications
Order data
Supply voltage
- 52 S 581 S026 AC 50/60Hz 230V ±10% 25VA
- 31 S 581 S026 AC 50/60Hz 24V ±10% 25VA
Permissible ambient temperature
TA
-30...+60°C
Permitted rel. humidity 10-95% r. h. no condensation
Medium temperature -30...+100°C
Operating pressure -1...+60bar
Test pressure 90bar
Differential pressure 1-25bar
Relay
- Contact AC 240V 2.5A C300
at least AC/DC 24V 20mA
- Mechanical service life Approx. 1 million switching cycles
Protection class acc. to EN 60529 IP65
Supply
- electrical Push-in spring terminals
0.25-0.75mm²
- Oil 7/16"-20 UNF
Mounting Flange (3-/4-hole)
Housing material Aluminium
PA glass-fibre-reinforced
Flow rate through valve 1l/min (water 20°C, 1bar
differential pressure)
Permitted oils Mineral and ester oils without
additives
Permitted refrigerants Non-corrosive, non-flammable
Mounting position Horizontal (rotatable by 180°), ±2°
Dimensions See dimensions in mm
Weight Approx. 1300g
Check base EN 61000-6-2, EN 61000-6-3
EN 61010-1
Overvoltage category II
Pollution level 2
For additional technical details, see table of parameters
INT280-60 (AC 24V) 31 S 581 S026
INT280-60 (AC 230V) 52 S 581 S026
Accessories and application
information see www.kriwan.com
Table of parameters
Parameter name Unit Default
Filling cycle type Fixed
Filling time s 10
Break time % 20
Overfill time s 0
Oil deficiency alarm delay s 120
Soiling stage 2 Warning

KRIWAN Industrie-Elektronik GmbH · Allmand 11 · D-74670 Forchtenberg · phone [phone] · fax [phone] · e-mail: i[email protected] · home: www.kriwan.com
Technical changes reserved
Product group SEdition: 710.00566.0