ER52 - Evaporator Controller

ER52 - Evaporator Controller
PB_ER52_10 2013
ER52 - Evaporator Controller
Electronic Refrigeration Line
Product Bulletin
Devices are standalone digital controller for “static”
or “ventilated” refrigeration units working at positive
temperatures.
They incorporate comprehensive controls to apply
controllers with food display cases or any evaporator units.
Devices can be used also as heating thermostat.
Physical Features
• Robust front panel for durability and long term usage
• Direct 230V supply: no external transformer required
• High power relays: direct compressor command
Application Features
•
•
•
•
•
Cooling or heating thermostat
Pre-set models and selectable options to extend pre-set models
Comprehensive controls: compressor, fan, defrost, light, alarms, door, standby
Temperature monitoring: minimum and maximum peaks
Sensor selector: NTC or PTC
PB_ER52_10 2013
Dimensions (in mm) and Mounting
35
77
3.7
27.3
28.5 36
29
71
71
Wirings
1 2 3 4 5 6 7 8 9 10 11
7(2)A 16(8)A
AUX
POWER
230 VAC
DI1
T2 T1
T1 = Return air temperature
T2 = Evaporator temperature
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Functions
+
+5°
Device Features
Description
Positive Temperature
It integrates all the functions to face refrigeration units at positive temperature.
It can be also used as heating thermostat
Pre-set models are selectable from the display.
Keyboard Lock
Display can be locked in order to prevent user to change parameter settings.
When locked, only temperature information is available to the user.
Direct Power Supply
Devices are powered directly with 230 VAC.
Multifunction Input (DI1)
IN
Auxiliary Output (AUX)
OUT
20°
0°
-5°
Digital inputs are available to manage alarm contact, door contact or remote
commands such standby, defrost, night or forced ventilation.
Auxiliary relays are available to manage optional outputs such light, alarm
report, defrost or fan.
Temperature Monitoring (Min/Max)
Device monitors the current temperature every 5 minutes and memorizes the
minimum and maximum peaks.
Peaks values are visualized on display temperature menu.
Control Features
Description
Thermostat Control
Cooling or Heating
Fan Control
Defrost Control
See detailed description hereafter.
Light Control
Temperature Alarm (High-Low)
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Thermostat Control
Thermostat is off when temperature reaches the setpoint. Request turns to On if temperature increases below
the setpoint + hysteresis on cooling or decreases under the setpoint-hysteresis on heating.
Thermostat output activation could be delayed in order to prevent from frequent on-off switching (advised when
thermostat drives a compressor).
Cooling Control
Heating Control
Temperature
Temperature
Setpoint+Hysteresis
Setpoint
Setpoint
Setpoint+Hysteresis
On
On
Thermostat status
Thermostat status
Time
Off
Off
Time
Compressor start time
On
Thermostat status
Off
On
Thermostat output
Re-start delay
Off
Set
+
+5°
Setpoint
Setpoint is blocked between minimum and maximum values to limit user setpoint adjustment.
A second setpoint can be defined to save energy during night or reduced load periods.
Periods are defined by external digital input command.
Setpoint limits
Maximum setpoint
2nd Setpoint Selection (option)
Normal
setpoint
Bias
Minimum setpoint
+/2nd Setpoint
IN
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Fan Control
Fan is optional and can be activated on the auxiliary relays. It works in paralell to the compressor and is
immediately stopped when door is opened. Fan is forced to on during defrost cycle.
Defrost Control
Defrost cycles are defined by setting the defrost initialization/end conditions and operations during defrost.
Defrost operation
Off cycle: unit is stopped and temperature naturally increases.
Electrical: unit is stopped and electrical heater is activating.
Hot gas: compressor is running and cool cycle is reversed by activating hot gas valve.
Defrost Start
Defrost can be initialized periodically based on time. Manual action is also available from display front panel or
wired remote switch. Defrost starts at first occurrence of time or manual events.
Periodical Defrost
Manual Defrost
On
or
Off
IN
Interval
time
Defrost stop
Defrost cycle ends based on a maximum duration time. Evaporator sensor could be used to stop the defrost
before maximum time occurs. A dripping period can be also added to the defrost cycle in order to fill the
evaporator with possible condensation.
Evaporator temperature
Dripping Time
On
Duration delay
Defrost Status
End temperature
Dripping
Off
Time
Defrost Cycle
On
Defrost Status
Off
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PB_ER52_10 2013
Light control
It can be activated on the auxiliary output. Light command is piloted from front panel key or wired door switch.
Light is switching at opening of the door.
Manual switching
Door switching
Standby/Fan only mode
Unit can be fully stopped by standby commands available on display front panel or wired remote switch.
Alternatively unit can be partially stopped by maintaining only the internal ventilation (fan only mode).
Name
Input
Output
Standby mode
Front panel key or digital input
All outputs Off
Fan Only mode
Digital input
All outputs Off except fan
Alarm Management
Table sums up all the alarms managed by the devices.
Name
Input
Output
High temperature
Temperature
No action on control - Alarm output activated
Low temperature
Temperature
No action on control - Alarm output activated
Interlock alarm
Digital input
All control outputs off - Alarm output activated
Report alarm
Digital input
No action on control - Alarm output activated
Door open
Digital input
Specific management (see below) - Alarm output activated
Sensor Failure
T1 sensor
All control outputs off - Alarm output activated
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PB_ER52_10 2013
20°
0°
-5°
Temperature alarm
Alarm is detected if temperature moves outside low and high thresholds. Alarm activation could be delayed in
order to consider temporary fluctuations due to specific operations such start up or defrost.
Thresholds are independent from the setpoint (absolute alarm).
Alarm situation is ending when temperature turns back between low and high thresholds.
Absolute Alarm
Temperature
High Limit
Low Limit
On
Alarm status
Off
Time
Door open
Specific strategy is applied when door is opened:
Door alarm is delayed to prevent from quick opening/closing of the door. Alarm becomes active when the delay
ends.
Compressor stop can be delayed.
Fan is stopped.
Alarm Outputs
Alarms are reported on display front panel LED, internal buzzer or auxiliary output. Alarm is reset automatically.
Alarm Activation
Buzzer mute
Display alarm LED
Internal Buzzer (option)
OUT
Auxiliary Relays (option)
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PB_ER52_10 2013
Display layout
Alarm LED
Thermostat / Compressor LED
Defrost LED / Command
Light LED / Command
ER52 Display
On / Stanby Command
Alarm mute
Menus navigation
Display Menus
Home
Home
Temperature
>5”
3”
Setpoint
STANDBY
5”
1”
7”
Configuration
>3”
Escape *
1”
* Automatic ESCAPE after 30 sec.
Menus Navigation
Parameter Setting Example
LIGHT
Reset
DEFROST
Function Keys
Temperature Menu
Code Description
t1
Return air temperature
t2
Evaporator temperature (visible only if selected)
thi
Monitored temperature highest peak
tLo
Monitored temperature lowest peak
Loc
Keyboard lock parameter
Setpoint Menu
Reset
ALARM MUTE
Min/Max Temperature reset
Messages and Error Codes
Code Description
Action
F1
To check t1 wiring or replace it
t1 sensor failure
F2
t2 sensor failure
To check t2 wiring or replace it
A1
General alarm
To resolve alarm cause
A2
Report alarm
To resolve alarm cause
A3
Door open
To close the door
Fon
Fan only mode
To reset fan only mode with
Digital Input
oFF
Standby
To restart unit with keyboard or
Digital Input
To wait defrost completion
Code Description
d
Defrost active
cSP
hi
High temperature
alarm
Lo
Low temperature
alarm
Setpoint
To check plant
(abnormal temperature)
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Configuration Menu
Code Default
Description
Range
Code Default
Setup
Mod
rEF
rEF / hEA
St
ntc
un
1 °c
ntc, A99
0 °1, 1 °c,
1 °F
Application selector:
cooling (rEF), heating (hEA)
Sensor types
Scale selector:
°C (decimal), °C (degree), °F
WARNING: Setup parameters have to be
defined before setting the configuration
parameters. Any new setup could recover
default settings.
Thermostat Control
LL
hL
cSP
hY
cc
Sc
-40
70
2 (40*)
2
3
-40 / hL
LL / 70 °C
LL to hL
0.5 / 10 °C
0 / 10 min
2
0 / 10 min
Setpoint Low Limit
Setpoint High Limit
Setpoint
Hysteresis
Compressor Min Off time
Compressor stop delay
at door opened
Temperature Alarm Setting
ALA
AhA
-40
70
At
30
AbE
no
-40 / 70 °C Absolute alarm low limit
-40 / 70 °C Absolute alarm high limit
Alarm delay at normal
0 / 120 min
operation
no, YES
Alarm buzzer enable
tiM (no*)
di
06
no, tiM
dF
oFF
dt
dd
dc
7
40
0
1 / 168
hours
oFF, ELE,
hGA
-40 / 70 °C
1 / 99
0 / 99
iF1
00
dP
Lt
Lt, SP, dF
dr
20
0 / 99
Defrost operation:
off cycle, electrical, hot gas
End defrost temperature
Defrost maximum duration
Defrost dripping time
Display value on defrost:
last temperature, setpoint,
Defrost flag
Display delay after defrost
00 / 07
nd
00 = Not used
04 =2 setpoint
01 = Interlock
alarm
05 =Standby
06 =Fan only
mode
02 = Alarm
report
07 =Defrost start
03 = Door
Digital input 1 delay
(alarms, door)
id1
5
0 / 99 min
bio
0
-12 / 12°C 2nd setpoint (bias)
LGS
MAn
no, MAn, Light switch command:
dor
not used, manual, door opened
SbE
YES
no, YES
Standby key enable
Probe Setting
SF1
3
SF2
3
So1
SE2
So2
0
no
0
Pu
3
Compressor On
time at sensor failure
Compressor Off
0 / 10 min
time at sensor failure
-12 / 12 °C Sensor T1 offset
no, YES Sensor T2 enable
-12 / 12 °C Sensor T2 offset
0 / 10 min
Display Setting
0 / 100
Display refreshing time
Auxiliary Output Setting
Auxiliary output 1 and 2
selectors
Defrost selector:
not used, periodical
Defrost periodical interval
Description
Multi function Input Setting
Digital input 1 selector:
Defrost Setting
dS
Range
AA1
LGt
no: Not used
no, AL0,
AL1, LGt, ALO = Alarm at
opening
dEF, Fan
AL1 = Alarm at
closing
LGt =Light
command
dEF =Defrost output
FAn =
Fan output
* Default values of Mod = hEA (heating)
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PB_ER52_10 2013
Ordering Codes
All ordering codes are relative to individual product package.
All items are also available with bulk pack (i.e. quantity of 10 controllers). Please refer to JC customer service.
Controllers
ER52-PM230-501C
Controller, 1 NTC sensor included
Accessories & Spare parts
ER-NTC-0C
NTC Sensor, 2 m, universal replacement
Technical Specification
Product Codes
ER52-PM230-501C
Power Requirements
230 VAC/VDC ±10%, 50/60 hZ, 3 W
Protection Class
IP55 (front) - IP20 (back)
Ambient Operating Conditions
-10 °C to 50 °C
15 to 80% RH (non-condensing)
Range
-40 to 70 °C
Accuracy
+/- 1K
Sensor
NTC, A99
Conformity
Johnson Controls, Inc., declares that these products are in compliance with the essential
requirements and other relevant provisions of the EMC Directive 2004/108/EC, Low Voltage
Directive 2006/95/EC.
Building Efficiency
Headquarters: Milwaukee, Wisconsin, USA
Branch Officies: Principal Cities World-wide
Metasys® and Johnson Controls® are registered trademarks of Johnson Controls, Inc.
All other marks herein are the marks of their respective owners.
© Copyright 2013 Johnson Controls, Inc. All rights reserved. Any unauthorized use or copying is strictly prohibited.
www.johnsoncontrols.com
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