Danfoss Optyma AK-RC 251 User Manual

Ordering
Controller
Accessories (for spares and replacement purposes):
Model Description Comments Code no.
AK-RC 251 AK-RC 251 Gen. 2,5 O/P, Single phase
Includes:
• 1 x 1.5 m, NTC 10K sensor
• 1 x 3 m, NTC 10K sensor
• 2 x 2 caps to provide IP65 protection after installation
080Z5000
Name Features Qty Code no.
3.5 m, NTC 10K Sensor Thermo plastic rubber probe 1 084N3210
8.5 m, NTC 10K sensor Thermo plastic rubber probe 50 084N3208
1.5 m, NTC 10K sensor Stainless steel probe 150 084N3200
8 | AN36292867744601-000101
© Danfoss | DCS (vt) | 2021.02
Technical specifications
Features Specifications
Power supply 100 - 240 V~, 50 - 60 Hz
Maximum input power in the operation 8.1 VA
Maximum nominal current 15 A
Relay DEFROST - SPDT - 20 A
NO
EN60730-1: 15 (15) A 250 V~
UL-60730: 9 FLA 54 LRA, 240 V AC
UL-60730: RES 12 A, 240 V AC)
NC
EN60730-1: 15 (13) A 250 V~
UL-60730: 6 FLA 36 LRA, 240 V AC
UL-60730: RES 6 A, 240 V AC
Relay FAN - SPST - 16 A
EN60730-1: 12 (9) A 250 V~
UL-60730: 5 FLA 30 LRA, 240 V AC
UL-60730: RES 10 A, 240 V AC
Relay COOL - SPST - 16 A
EN60730-1: 12 (9) A 250 V~
UL-60730: 5 FLA 30 LRA, 240 V AC
UL-60730: RES 10 A, 240 V AC)
Relay AUX 1 - SPDT - 20 A
NO
EN60730-1: 15 (15) A 250 V~
UL-60730: 9 FLA 54 LRA, 240 V AC
UL-60730: RES 12 A, 240 V AC
NC
EN60730-1: 15 (13) A 250 V~
UL-60730: 6 FLA 36 LRA, 240 V AC
UL-60730: RES 6A, 240 V AC
Relay AUX 2 - SPDT - 16 A
NO
EN60730-1: 12 (9) A 250 V~
UL-60730: 5 FLA 30 LRA, 240 V AC
UL-60730: RES 10 A, 240 V AC
NC
EN60730-1: 10 (8) A 250 V~
UL-60730: 5A, 240 V AC
No. of relay operations EN60730-1:100.000 operations
Probe temperature range -58 – 211 ºF
Resolution, setting and differential 0.2 ºF
Thermometric precision ±1.8 ºF
Loading tolerance of the NTC probe at 25 °C ±0.7 ºF
Working ambient temperature 14 – 122 ºF
Storage ambient temperature -22 – +140 ºF
Protection degree IP 40 (IP 65 installing the proper glands)
Pollution degree II acc. UL 60730-1
Construction Independently mounted acc. UL 60730-1
Control device classification
Built-in assembly, with Type 1.B automatic operation action feature, for use in clean situations,
logical support (Software) class A and continuous operation.
Double isolation between power supply, secondary circuit and relay output.
Temperature during ball-pressure test
Accessible parts: 167 ºF
Parts which position active elements: 257 ºF
Current of radio jamming suppression tests 270 mA
Voltage and current as per EMC tests 207 V, 17 mA
Type of assembly Fixed internal
MODBUS address Shown on label
Dimensions 11.42 in (W) x 5.55 in (H) x 3.32 in (D)
Internal buzzer

Danfoss Optyma AK-RC 251 Specifications

General

Brand	Danfoss
Model	Optyma AK-RC 251
Category	Temperature Controller
Language	English