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A52x Series Electronic Refrigeration Controller with Adaptive Defrost Technical Bulletin

Select the evaporator fan speed when the compressor relay is off.

To save the selection, press

SET.

Note:

Fan speed selections depend on whether you select

FAN

TYPE

1-SPD

2-SPD

in the System Setup menus.

For 1-SPD Fan:

OFF

OFF

For 2-SPD Fan:

HI, LOW,

OFF

OFF

Defrost Setup Screens

The top-level

Defrost Setup

start screen for setting up the

refrigeration system behavior during defrost mode. To scroll

through the top-level start screens, tap the

DOWN

keys. To

go to the

DEFROST TERMINATION TEMPERATURE

screen or

the

MAX DEFROST DURATION

screen and setup or adjust the

defrost operation and schedule, press

SET.

No selection

To go to the

DEFROST

DURATION

screen, press

SET

. No

selection

Select the maximum defrost duration in minutes. To save the

value, press

SET.

Note:

Temperature-based defrost durations that do not reach

termination temperature terminate when the maximum

defrost duration time elapses.

minutes

See

Evaporator Fan Drip-Time Delay

To go to the

DRIP TIME

screen, press

SET.

No selection

Select the preferred drip time delay in minutes after the defrost

duration terminates. To save the value, press

SET.

minutes

To go to the

DEFROST

TERMINATION

TEMPERATURE

screen,

press

SET

No selection

Select the defrost termination temperature, sensed at the Sn2

defrost sensor, at which the defrost duration is terminated. To

save the value, press

SET

Note:

The

DEFROST TERMINATION TEMPERATURE

screen

appears only if

TE/MP

is selected in the

DEFROST TYPE

screen in the System Setup menus.

-1C°–30C°
30F°–90F°

10°C
40°F

Table 8: A52x Controller Set Up Screens, Descriptions, Behaviors, Value Ranges a Selection Lists (Part

10 of 19)

Screen Name in

Message Field

Parameter Description, Behavior, User Action

Value Range or

Selection List

Default

Value or

Selection

EVAP FAN SPEED
COMP OFF

OFF

DEFROST SETUP

SET

DEFROST
DURATION

SET

MAX DEFROST
DURATION

MIN

DRIP TIME

SET

DRIP TIME

MIN

DEFROST
TERMINATION
TEMPERATURE

SET

DEFROST
TERMINATION
TEMPERATURE

40°

Содержание A52 Series

Страница 1: ...losure base for wall surface mounting An optional DIN Rail mounting kit Part No BKT524 1K is also available IMPORTANT Use of this product is subject to and constitutes your agreement to the End User L...

Страница 2: ...s The defrost and alarm icons also function as touchpad keys to initiate unscheduled defrost cycles and clear system alarms Cleaning the A52x Remove any loose debris from the controller Wipe the exter...

Страница 3: ...at the compressor is on When the Cooling icon is off the system is not in normal refrigeration mode it may be in defrost mode or system shutdown 3 Evaporator Fan Icon The Evaporator Fan icon indicates...

Страница 4: ...are not polarity sensitive 0 30 to 1 50 mm2 22 to 16 AWG Stranded wires and twisted leads cable C There are four low voltage common terminals All of the low voltage C terminals are connected together...

Страница 5: ...the control compressor 1 50 to 6 0 mm2 16 to 10 AWG Alarm L1 LC The common LC normally open LNO and normally closed LNC terminals for line voltage single pole double throw SPDT dry contact relay to co...

Страница 6: ...ntroller Defrost Mode The selections you make for defrost type defrost termination type and evaporator fan behavior determine how your refrigeration system operates during defrost mode See Defrost Typ...

Страница 7: ...ments controlled by the defrost relay to melt the ice that accumulates on the evaporator coil during normal cooling operation The electric resistive heating elements are typically embedded in or posit...

Страница 8: ...ach the termination temperature The defrost duration terminates when the evaporator reaches the selected defrost termination temperature or the maximum defrost duration expires whichever occurs first...

Страница 9: ...lay is not available for Off Cycle passive Defrost See Figure 8 on page 10 Evaporator Fan Temperature Delay Evaporator Fan Temperature Delay holds the evaporator fan relay or relays off open after the...

Страница 10: ...tem Setup parameters include the following features Time and date Defrost type Defrost termination type Evaporator fan type Sensor type Units of temperature Celsius or Fahrenheit Display brightness an...

Страница 11: ...rols single speed evaporator fans The LO SPD AUX relay and the HI SPD relay control two speed EC evaporator fans When you control single speed fans with the HI SPD relay the LO SPD AUX relay is availa...

Страница 12: ...ux and Hi Spd Relay States for Two Speed Evaporator Fan Operation in Normal Cooling Mode Continuous High Speed Fan Figure 11 Compressor Lo Aux and Hi Spd Relay States for Two Speed Evaporator Fan Oper...

Страница 13: ...hes the defrost termination temperature after the expected defrost duration time elapses Adaptive Defrost shortens the next defrost interval Maximum Time Between Defrosts Maximum Time Between Defrosts...

Страница 14: ...Shutdown This option takes priority over the normal control of the compressor defrost and fan relays Low Speed Fan if running at High Speed This option becomes available only if the control is config...

Страница 15: ...time is represented in minutes If you acknowledge the alarm and the alarm relay deactivates but the alarm condition persists for this number of minutes the alarm relay reactivates Alarm vs Warnings Th...

Страница 16: ...s that do not apply to your selections become unavailable when you set up the cooling and defrost parameters The A52x Controller ships with factory default selections and values in the system screens...

Страница 17: ...creens for more information To scroll through and view the QREV PSHC STATUS screens press SET in the QREV PSHC STATUS start screen See Viewing the QREV PSHC Status Screens for more information Note Th...

Страница 18: ...splays the next defrost cyclestart time Displays the current state of Universal Input4 Displays the state of the thermal defrost switch connected to the HVBIN terminals Displays thestatus of thecompre...

Страница 19: ...C SUPERHEAT status screen To scroll through the QREV PSHC status screens tap the DOWN and UP keys QREV PSHC TEMPERATURE QREV PSHC STATUS SET QREV PSHC SUPERHEAT QREV PSHC PRESSURE QREV PSHC CURRENT ST...

Страница 20: ...e your refrigeration system in the System Setup screens You can set up the following settings in the System Setup Screens System time and date System components Sensor types Evaporator fan motor type...

Страница 21: ...24 To set the minutes select the minute value and press SET The minutes range is00 to 59 To set the time period select AM or PM and press SET Note The PERIOD screen does not appear if you select the...

Страница 22: ...r fan and press SET To set the defrost type select OFF CYC off cycle passive defrost HOT GAS hot gas defrost or ELC TRC electric resistive heat and press SET To set a defrost termination type select T...

Страница 23: ...ATE TIME SET UNITS SET SET DISPLAY BRIGHTNESS SET DISPLAY BRIGHTNESS 5 SET KEYPAD SOUND SET KEYPAD SOUND OFF To enter a system name scroll through the available characters and numbers with the DOWN an...

Страница 24: ...d press SET The differential value range is 1F to 15F SET To set the Sensor 1 failure mode select ON OFF or AVG average and press SET To set the compressor Anti Short Cycle Delay time select the delay...

Страница 25: ...uration value To set the drip time delay select the drip time delay value and press SET The delay value range is 0 to 10 minutes To set the evaporator fan delay temperature sensed at the Sensor 2 defr...

Страница 26: ...DEFROST SCHEDULE screen the start time of only the first defrost cycle is set The remaining defrost cycles automatically start at equal time intervals after the first defrost To set the time for the...

Страница 27: ...the initial defrost interval select the defrost interval value and press SET The defrost interval value range is 1 to 48 hours To set the expected defrost duration select the defrost duration value an...

Страница 28: ...UTS SET To set a universal input mode select EMG SW Emergency Switch DOR OPN Door Open MAN RM Man In Room REF LK Refrigerant Leak or NON None and press SET To set an input type select BINARY or ANALOG...

Страница 29: ...the period of time that elapses before an alarm annunciates To set the delay time select the delay time value and press SET The delay value range is 0 to 99 minutes Auto clear mode automatically clea...

Страница 30: ...Y 10 MIN AUTO CLEAR SET AUTO CLEAR YES REALARM INTERVAL SET REALARM INTERVAL 15 MIN SET SET SET SET SET SET QREV PSHC ALARM SET SN2 FAILURE ALARM SET To enable the Door Open Alarm select YES and press...

Страница 31: ...nd UP keys SET FILE SET CONFIG FILE EXPORT SET CONFIG FILE EXPORT YES SET YES INSERT USB DRIVE NO CONFIG FILE IMPORT SET CONFIG FILE IMPORT YES INSERT USB DRIVE SET YES NO DATA EXPORT SET DATA EXPORT...

Страница 32: ...h the top level setup start screens tap the DOWN or UP keys To go to the Sn1 COOLING TEMP status screen press SET No selection N A The temperature at Sensor 1 displays in the status field To scroll th...

Страница 33: ...te displays in the upper Info field To scroll through the system status screens tap the DOWN or UP keys LNO or LNC N A The current main firmware version displays in the Status field To scroll through...

Страница 34: ...rt screen for setting up the refrigeration system s physical features and parameters To scroll through the top level start screens tap the DOWN or UP keys To go to the TIME DATE setup start screen pre...

Страница 35: ...t start screen No selection Select MMM DD YYYY or DD MMM YYYY as the date format To save the format press SET MDY or DMY MDY Date setup start screen Select a month value and press SET to save the valu...

Страница 36: ...ection Select a temperature offset value for Sensor 1 between 2 5C and 2 5C 5F and 5F To save the selection press SET 2 5C 2 5C 5F 5F 0 C 0 F To scroll through the system setup start screens tap the D...

Страница 37: ...r hot gas bypass To save the selection press SET ELE TRC OFF CYC or HOT GAS OFF CYC To scroll through the system setup start screens tap the DOWN or UP keys To go to the DEFROST TERM TYPE screen press...

Страница 38: ...on Select the refrigerant type used by the system and press SET Refer to the product bulletin Quick Response Expansion Valve QREV and Precision Superheat Controller PSHC LIT 12012398 for available pro...

Страница 39: ...n Select the optional user passcode value To save the value press SET 0000 to 9999 0000 Refrigeration Setup Screens The top level REFRIGERATION SETUP start screen for setting up the system behavior du...

Страница 40: ...iring fails You can select on off or the average temperature of last the four cycles before failure To save the selection press SET ON OFF or AVG OFF To scroll through the RFEFRIGERATION SETUP start s...

Страница 41: ...n temperature terminate when the maximum defrost duration time elapses 0 to 99 minutes See Evaporator Fan Drip Time Delay To go to the DRIP TIME screen press SET No selection Select the preferred drip...

Страница 42: ...ber of defrost cycles per day at equal time intervals during the day For example if the DEFROST QTY PER DAY value is intervals then a defrost cycle starts automatically every six hours Select MANUAL t...

Страница 43: ...nterval select the defrost interval value and press SET The defrost interval value range is 1 to 48 Note The Defrost Interval is the time in hours from the start of a defrost cycle to the start of the...

Страница 44: ...not start To set the blackout period start time select the hours minutes and AM or PM values and press SET Hours Minutes and AM or PM To go to the BLACKOUT DURATION screen to set the length of time fo...

Страница 45: ...NON To set an input type in the TYPE screen press SET No selection To set an input type for UI4 select BINARY or ANALOG and press SET BINARY or ANALOG To set an active state in the ACTIVE STATE screen...

Страница 46: ...rigerant Leak or NON None and press SET EMG SW DOR OPN MAN RM REF LK or NON To set an input type in the TYPE screen press SET No selection To set an input type for UI5 select BINARY or ANALOG and pres...

Страница 47: ...p start screen press SET Note Use the following ALARM SETUP screens to set up the Sn1 Low Temperature alarm Sn1 Failure alarm Sn2 Failure Alarm and QREV PSHC alarm No selection To configure the Sensor...

Страница 48: ...delay period select the delay time value and press SET The delay value range is 0 to 99 minutes 0 to 99 minutes To set the Sensor 1 High Temperature Alarm auto clear press SET No selection To enable t...

Страница 49: ...s SET No selection To confirm a file export select YES and press SET YES or NO To export a file insert a USB drive into the controller No selection To set up a file import in the CONFIG FILE IMPORT sc...

Страница 50: ...t select YES and press SET YES or NO To export data insert a USB drive into the controller No selection Table 8 A52x Controller Set Up Screens Descriptions Behaviors Value Ranges a Selection Lists Par...

Страница 51: ...24 and without AM or PM time periods A99 A99 temperature sensor Select the sensor type ANL Analog input type Select to configure a universal input as a 0 to 10 VDC analog input AU TO Auto generate def...

Страница 52: ...or OFF Off Sn1 Sensor Failure Mode When you select ON and the system detects a sensor failure condition the controller ignores the sensor setpoint control and maintains the cooling equipment as on con...

Страница 53: ...Table 11 SPDT Alarm Relay Electrical Ratings Agency and File UL 60730 EN 60730 Applied AC Voltage at 50 60 Hz 24 VAC 120 VAC 240 VAC 240 VAC Horsepower LC LNO and LC LNC 1 2 HP 1 2 HP 1 2 HP Full Load...

Страница 54: ...VAC Table 15 Part 1 of 2 A52x Refrigeration Controller with Adaptive Defrost Product A524 A525 Power Consumption 1 8 VA maximum Supply Power 84 VAC to 260 VAC 50 60 HZ 10 VA maximum Ambient Conditions...

Страница 55: ...C 40F to 248F 0 to 100 RH condensing Reference Resistance 1 035 ohms at 25 C 77 F and 855 ohms at 0 C 32 F Accuracy 0 5 C 0 9 F between 15C and 57C 5 F and 167 F Refer to the A99B Series Temperature S...

Страница 56: ...th the limits for a Class B digital device pursuant to Part 15 of the FCC Rules These limits are designed to provide reasonable protection against harmful interference in a residential installation Th...

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