Defrost On Demand; Technical Specification - Danfoss ERC 211 User Manual

2.6|

Defrost on Demand

This feature records and averages the evaporator temperature recorded during the first three cut out of compressor
immediately after defrost. The controller will constantly follow the evaporator temperature and compare with the above
recorded average temperature. In between two defrosts, If the evaporator temperature goes below the previously recorded
average temperature by "defrost on demand" value "d30", defrost will be triggered.
– This function can only be used in 1:1 systems.
– This function is disabled when the parameter "defrost on demand" is set to 20.
– Defrost on demand is triggered only if the time since the last defrost session has ended is greater than ¼ of the defrost
interval or 2 hours whichever is lesser.
– Defrost doesn't start by this method during the following scenarios.
– Pull down mode.
– Night mode.
– Main switch in DI or main switch in Menu is in OFF position.
– Manual control mode.
– Evaporator sensor senses a temperature which is greater than 0 °C.
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Technical Specification

FEATURES
Power supply
Rated power
Inputs
Allowed sensor types
Sensors included in Kit Solution
Accuracy
Output
Display
Operating conditions
Storage conditions
Protection
Environmental
Resistance to heat and fire
EMC category
Approvals
10
FR · ERC 21X user manual · DKRCC.ES.RL0.H3.02/520H9656 · ©Danfoss
DESCRIPTION
115 V AC / 230 V AC 50/60 Hz, galvanic isolated low voltage regulated power supply
Less than 0.7 W
4 inputs:
2 analogue, 1 analogue/digital and 1 digital
NTC 5000 Ohm at 25 °C, (Beta value=3980 at 25/100 °C - e.g. EKS 211)
NTC 10000 Ohm at 25 °C, (Beta value=3435 at 25/85 °C - e.g. EKS 221)
PTC 990 Ohm at 25 °C, (e.g. EKS 111)
Pt1000, (e.g. AKS 11, AKS 12, AKS 21)
NTC 10000 Ohm at 25 °C, cable length: 1.5 m
Measuring range:
-40 – 105 °C (-40 – 221 °F)
Controller accuracy:
±1 K below -35 °C, ±0.5 K between -35 – 25 °C,
±1 K above 25 °C
DO1 Compressor relay:
16 A, 16 (16) A, EN 60730
10 FLA / 60 LRA at 230 V, UL60730
16 FLA / 72 LRA at 115 V, UL60730
DO2 Defrost relay:
8 A, 2 FLA / 12 LRA, UL60730
8 A, 2 (2 A), EN60730
DO3 Fan relay:
3 A, 2 FLA / 12 LRA, UL60730
3 A, 2 (2 A), EN60730
DO4 Alarm/Light relay:
2 A
LED display, 3 digits, decimal point and multi-function icons, °C + °F scale
-10 – 55 °C (14 – 131 °F), 90% Rh
-40 – 70 °C (-40 – 158 °F), 90% Rh
Front : IP65 (Gasket integrated)
Rear: IP00
Pollution degree II, non-condensing
Category D (UL94-V0)
Category I
UL recognition (US & Canada) (UL 60730)
ENEC (EN 60730)
CQC
CE (LVD & EMC Directive)
EAC (GHOST)
NSF
ROHS2.0
HACCP temperature monitoring in compliance with EN134785 Class I,
when used with AKS 12 sensor