HVAC/R Protection Solutions and Monitoring

Suitable for natural refrigerants

1 2 36

KRIWAN’S HVAC/R PROTECTION SOLUTIONS

Solutions for

1 Level monitoring

2 Oil level regulation

3 Differential pressure monitoring

4 Voltage monitoring

5 Motor protection

6 Temperature sensors

7 Modbus-Gateway

The KRIWAN product portfolio for multi-

compressor refrigeration systems enables

reliable and comprehensive system protection.

In addition, the data interfaces of the KRIWAN

devices allow data to be read out, integrated

into higher-level control systems, and

optimized in the process.

1

4

7

5

WE HELP YOU TO GET CONNECTED

Benefits for your customers

Reduced downtime

! Efficient, data-based troubleshooting

€ Cost-effective access

Your Benefits

Efficient complaint management

Data supporting innovation process

Data as foundation of your digital business strategy

Suitable for natural refrigerants

INT276 ICN on refrigerant receiver

1

Versions

▪ INT279 LN and LX: Monitoring of the minimum/maximum liquid level

▪ INT276 ICN and ICX: Level sensors designed against build up of ice on the refrigerant receiver

▪ INT276 HT: Version for use at media

temperatures of up to 140 °C

Benefits

▪ Suitable for use in potentially explosive areas

▪ Optical status information

▪ Installation control

▪ Potential-free changeover contact

▪ Low leak rate

▪ Quick and easy assembly

▪ Self-monitoring of device function

▪ Two part design: replacement without evacuating the system

▪ UL and CE conform

KRIWAN level monitoring comprises different sensor versions for the monitoring of the

liquid level in refrigerant compressors, oil and refrigerant receiver, and oil separators.

LEVEL MONITORING: INT276 – 279

View glass for visual level checks

Alarm and status display via LED

3- and 4-hole flange

Oil port: 7/16" – 20 UNF

Diagnose interface

Connection via cable or M12 jack

180° reversible – 2 possible installation positions

2

Versions

▪ INT280– 60 Diagnose → applications up

to 60 bar, also suitable for CO2

▪ INT280–130 Diagnose → specially

developed for transcritical CO2 plants,

up to 130 bar

Benefits

▪ Plug-and-play solution

▪ Intelligent oil management

▪ Compact design

▪ Diagnose interface

→ troubleshooting via INTspector® App

→ changing of functional parameters

▪ UL and CE conform

The INT280 oil level regulator supplements the KRIWAN system solutions for efficient

and safe oil management in the refrigeration circuit.

OIL LEVEL REGULATION: INT280 DIAGNOSE

Oil pressure low Oil pressure ok

Delta-P II

3

Application

▪ Monitoring of oil pump function

Benefits

▪ Optical status information

▪ Installation control

▪ Potential-free changeover contact

▪ Low leak rate

▪ Quick and easy assembly

▪ Self-monitoring of device function

▪ Two part design: replacement without

evacuating the system

▪ UL and CE conform

The KRIWAN solutions for differential pressure monitoring reliably monitor the function of the

oil pump in semi-hermetic reciprocating compressors, ensuring the transport of a sufficient

oil quantity and preventing damage to the compressor.

DIFFERENTIAL PRESSURE MONITORING: DELTA-P II / INT250

Description

▪ Monitoring of 1~ AND 3~ networks

▪ Switching cabinet installation on

profile rails

▪ Push-in terminals, quick and easy wiring

▪ Temperature: PTC or Pt1000

Application

▪ Switching cabinets

▪ Protection and monitoring of the

system’s power supply

Benefits

▪ Programmable via INTspector® App

▪ Expanded intelligence with

INTspection Memory

▪ More precise accuracy to set value ± 2,5 %

▪ Faster error detection as of 60 ms

Placement in the switching cabinet

With the INT69 UY Diagnose voltage monitor, KRIWAN offers a highly precise and

innovative solution for protecting and monitoring sensitive electrical components,

drives and electrical consumers.

VOLTAGE MONITORING: INT69 UY DIAGNOSE4DIFFERENTIAL PRESSURE MONITORING: DELTA-P II / INT250

AMSPTC

DATA

DAT

A

DATA

LED status display

AMSPTC

AMSPTC

Protection functions

▪ Winding temperature

▪ Hot gas monitoring

▪ Current measurement

▪ Phase monitoring

▪ Line voltage monitoring

▪ Power monitoring

▪ Switching cycles

Benefits

▪ Suitable for use in potentially

explosive areas

▪ Lubrication monitoring

▪ UL and CE conform

▪ Data interface

INT69 is the KRIWAN brand and industry standard for semi-hermetic compressors. Tried and tested and proven

reliable, it protects against undesirable conditions, such as excessive winding temperatures, an insufficient power

supply or incorrect commissioning. Thanks to its Diagnose capability, INT69 Diagnose lets you read out data and

perform troubleshooting quickly.

MOTOR PROTECTION: INT69 DIAGNOSE

INT69® diagnose device series INT185® current transformer

5

PTC

Types

▪ PTC thermistor

▪ Pt100 / Pt1000

▪ NTC

▪ AMS

▪ PTC+

Application

▪ Winding installation – electric motors

▪ Surface temperature sensor

▪ Screw-in sensors

▪ Discharge gas temperature compressor

Benefits

▪ Suitable for use in potentially

explosive areas

▪ UL and CE conformDischarge gas sensor In the motor winding Surface sensor

Pt100 / Pt1000

Temperature sensors play an important role in the thermal monitoring of electric motors,

discharge gas or other hotspots in the refrigeration system.

KRIWAN products allow the monitoring of a large number of applications using a variety

of sensor types and designs. Thanks to the fully automated production of PTC sensors,

we achieve a very high process reliability and an extremely low PPM rate.

TEMPERATURE SENSORS6

INT250 INT280Discharge gas sensor

KRIWAN Diagnose devices continuously analyze the condition of the machine or system based on the values

provided by the machine protection sensors and store the data. If the Diagnose devices are integrated into the

higher-level system controller and connected to the Internet, the data can be read out anywhere in the world,

providing a detailed view of the machine or system.

CONNECTIVITY SOLUTIONS FOR RACKS7

INT69 Diagnose INT600 Modbus-Gateway

INT69 UY Diagnose

INTspector appThe data of the Diagnose

devices can be retrieved with

the INTspector app on site at

any time. The INTspector® app is

also used to parameterize motor

protection devices.

Controller

Integration into your existing plant system

Qualified personnel on the compressor

Direct diagnostics on site

TI9

1000

164.

0

KRIWAN Industrie-Elektronik GmbH

Allmand 11 74670 Forchtenberg Germany

(+49) 7947 822 0 (+49) 7947 7122

info@kriwan.com

kriwan.com