Sub-Zero NANOCHILL NC-120A User manual

User Manual
N A N O C H I L L
N C - 1 2 0 A
www.pvrcontrols.com
RST
2
SET
NANOCHILL

u 3 NTC probes for Liquid temp, Antifreeze temperature,
u Compressor current sensing upto 20Amp.
u Relay outputs : Compressor , Precision SV, Condensor,
Pump, Alarm & Water SV,
trip protection for Compressor and pump
u O Resolution 0.1 C
Condensor Temperature.
u It also protect compressor by tripping it in underload &
overload conditions.
u LCD with backlight to display all parameters.
u Auto/Manual reset for HP, LP and AFT.
The Subzero “NANO CHILL”(NC 120) are controllers that
integrates all the basic control functions required by a chiller.
A user friendly Lcd screen displays all parameters, status
and alarm messages.
u Range : - 30.0ºC to + 50.0ºC
u HP,LP, Compressor O/L, SPP, Pump O/L, Auxiliary Fault
Introduction
Features:
Items included :
01 NC-120A NC-120A 02
NO.
1.
2.
3.
4.
5.
QTY
1No.
1No.
ITEMS
CONTROLLER
TRANSFORMER
ITEMS QTY
NO.
1. 1Nos.
LIQUID LEVEL SWITCH
Optional :
2. 1 SetCT WITH WIRE HARNESS
6.
2Nos.
SIDE LOCK (BIG)
1No.
1No.
CATALOG
3Nos.
SENSORS
PROKEY

INDEX INDEX
03 04
To set tripping voltage of digital inputs.FAULT SENS LOGIC 11
To set differential for Condenser.COND. SET DIFF. 11
To set LP fault to Auto or Manual reset.
Enable / disables liquid level sensing .
LP FAULT RESET
LIQ. LEVEL SENSOR
13
13
To set Condenser set temperature.COND SET TEMP. 11
10
To enable or disable condenser probe.
COND PROBE ACTIVE
To set Ct faults auto or manual reset.
CURRENT FAULT RST 15
This parameter configures pump
working logic
To enable / Disable Current Sensing
Lower current limit for the compressor .
PUMP RUN LOGIC
CURRENT INPUT
CURRENT LO LIMIT
13
14
15
Higher current limit for the compressor 15CURRENT HI LIMIT
No. of retrials before sensing underload
/ overload fault in auto mode
15CURRENT RETRIALS
This decides whether controller should
display faults in stand by mode or not.
FAULT IN STAND BY 12
NC-120A NC-120A
To set the cutout point of the Controller.
To set Chiller Set point
To set compressor restart delay.
To set minimum allowable low
temperature limit and alarm..
To enable or disable Antifreeze function.
To set Antifreeze set point.
To set Antifreeze differential
To set Main(Liquid) probe calibration.
To set Antifreeze probe calibration.
To set Condenser probe calibration .
CHILLER SET TEMP.
To set other parameters
CHILLER SET TEMP.
COMP TIME DELAY.
HIGH TEMP. ALARM
LOW TEMP. ALARM
AFT PROBE STATUS
AFT SET TEMP.
AFT DIFFERENTIAL
LIQ. PROBE CAL.
AFT PROBE CAL.
COND PROBE CAL.
PROGRAM MODE
SET MODE
HT POWER ON DLY
DESCRIPTION
PARAMETER
Pg.
No.
06
06
06
06-07
07
07
08
08
08
09
09
09
10
10
DIFFERENTIAL To set temperature differential for
compressor restart.
To set maximum allowable high
temperature limit & alarm.
This sets Power ON delay for high
temperature alarm to avoid false
alarms.
To set Current calibration.
CURRENT CAL 10
To set LP fault sensing delay
LP SENSING DLY 12
To set HP and AFT fault to Auto or
Manual reset.
HP/AFT RESET 12
This parameter configures condenser
working logic.
COND RUN LOGIC 14
COND START DLY 14This parameter set the time delay that
condenser should start before
compressor.
It sets normal delay for EWFS fault
sensing.This avoids false tripping due
to water splashing.
EWFS NORMAL DLY 16
It sets power on delay for EWFS fault
sensing.
EWFS SATRTUP DLY 16
This configures AUX i/p as EWFS fault or
as AUX i/p to switch off whole system.
CONFIG AUX I/P 16
DESCRIPTION
PARAMETER
Pg.
No.

06
CHILLER SET TEMP.
Sr.No.
Range
Function : To set Chiller Set point.
Lcd will change to set mode and flash.
Then press set key once & release .Set
point will flash. Set point can now be
changed by using UP/DOWN key. After
achieving the desired range, press the
SET key .
0
Lt C = Low temp Limit.
0
Ht C = High temp.Limit
Parameter (LCD Message)
Description of parameters and functions.
Parameter setting method.
Min Max
Fact. Set
01
Release.
Press and hold "SET"
key for 2 seconds and
Lt +0.1ºC Ht -0.1ºC 10.0ºC
To set other parameters.
Hold key for 2 seconds
and release.
LCD will show Program Mode. And the
set Temperature To go to other
parameters, use up/ down keys.
02
03
Range
Min Max Fact. Set
Lt +0.1ºC Ht -0.1ºC 10.0ºC
CHILLER SET TEMP. Function : To set Chiller Set point.
press the set key.
To change Set Temp parameter, First set key once & release Parameter
value will flash. Now Use UP/DOWN
keys to set desired value.
04
COMP. TIME DELAY Function : To set compressor restart
delay.
Contd.
Parameter List
Min : MINIMUM Max : MAXIMUM
Fact. Set : FACTORY SETTING(DEFAULT)
Use UP/DOWN keys to set desired
value.
parameter,press the set key.
To change Comp Time Delay
NC-120A
SET MODE
PROGRAM MODE
INDEX
05
Once the SET key is pressed the
control goes into the normal mode and
displays the temperature.
SET - EXIT
UP/DOWN - SCROLL
19
To set customer name to be displayed
at controller power ON.
ENTER YOUR NAME 19
To set customer service number.
ENTER YOUR NO. 19
To enable / disable controller function in
precision mode.
To enable auto start of controller at
power ON.
To lock Keypad.
To clear last fault history.
Revert to Factory set parameters.
PRECISION MODE
AUTOSTART
KEYPAD LOCK
CLEAR FAULT LOG
FACTORY DEFAULTS
17
17
17
18
18
To display total compressor working
Hours.
To display total pump working Hours.
To clear comp run hrs.
COMP RUN HRS
PUMP RUN HRS
CLR COMP RUN HRS
18
18
18
To clear pump run hrs.
CLR PUMP RUN HRS 19
NC-120A
This parameter will set pump working
incase of Auxilliary fault.
AUX I/P SETTING 17
DESCRIPTION
PARAMETER
Pg.
No.
Key Functions 20
Technical Data 21
Suggested Wiring Diagram 22
Panel Cutout & Dimensions 23

07 08
0.1ºC 10.0ºC 2.0ºC
EXAMPLE: If this parameter is set at 3
minutes, the compressor will cut off at the
set temperature, but will not restart for a
minimum of 3 minutes. This time delay is
also effective at 'Power On’ of the system.
This safety feature is used to protect the
compressor from restarting within a short
period due to power fluctuations.
Range
Min Max Fact. Set
0 Min 20 Min 3 Min
Use UP/DOWN keys to set desired
value.
0 0
(10.0 C + 2.0 C).
0
EXAMPLE: If the set point is setat 10.0 C
0
and differential is setas 2.0 C, then when
0
the system reaches 10 C,the compressor
0
will cutout. Since differential is 2.0 C, the
0
compressor will cut in(restart) at 12.0 C
To change DIFFERENTIAL
parameter,press the set key.
05
Range
Min Max Fact. Set
Range
Min Max Fact. Set
DIFFERENTIAL Function: To set temperature differential
for compressor restart.
Sr.No.
Parameter (LCD Message)
Description of parameters and functions.
Parameter setting method.
HIGH TEMP. ALARM
First Press set key once & release
Parameter value will flash. Now UP /
DOWN keys to set desired value.
To change High Temp
parameter,press the set key.
06
Function: To set maximum allowable
high temperature limit and alarm.
Set Point -1 50.0ºC 50.0ºC
EXAMPLE : If this parameter is set to
0
50.0 C, then once chiller temperature
0
goes above 50.0 C then controller will
show “Ht” and alarm will be ON.
Range
Min Max Fact. Set
Range
Min Max Fact. Set
Range
Min Max Fact. Set
AFT SET TEMP
Use UP/DOWN keys to set desired
value.
EXAMPLE: If this parameter is set to
5.0ºC controller will trip the compressor
on Antifreeze fault if the AFT sensor
goes below 5.0ºC.
To change AFT SET TEMP.
parameter, press the set key.
09
Function: To set Antifreeze tripping point.
-30.0ºC Lt-0.1ºC 4.0ºC
Sr.No.
Parameter (LCD Message)
Description of parameters and functions.
Parameter setting method.
function of the controller
Enable = It enables the Antifreeze Trip
Use UP/DOWN keys to set desired
value.
function of the controller
Disable = It disables the Antifreeze Trip
To change AFT PROBE
STATUS parameter, press the
set key.
08
Function : To enable or disable
Antifreeze function.
EXAMPLE: Setting this parameter at
0
5.0 C will not allow the set point to go
0
below 5.0 C Also, if the temperature
0
reaches or goes below 5.0 C the display
will show Low Temp. Alarm and at this
point the alarm will activate.
AFT Set
Temp.
+0.1ºC -0.1
Set Temp. 5.0ºC
Disable Enable Disable
LOW TEMP. ALARM
07
Function: To set minimum allowable low
temperature limit and alarm.
To change the Low Temp
parameter, press the set key.
First Press set key once & release
Parameter value will flash. Now UP /
DOWN keys to set desired range.
AFT PROBE STATUS
NC-120A NC-120A

09 10
Sr.No.
Parameter (LCD Message)
Description of parameters and functions.
Parameter setting method.
LIQ. PROBE CAL.
AFT PROBE CAL
EXAMPLE : If the actual temperature is
20.0ºC and the temperature on the
controller shows 22.0ºC set this
O
parameter to -2.0 C and once out of this
mode, the temperature will display
20.0ºC. (22.0ºC-2.0ºC).
Use UP/DOWN keys to set desired range.
During the course of time there may be a
slight offset in the actual temperature and
the temperature displayed.
Use UP/DOWN keys to set desired value.
EXAMPLE : Same as Main Probe Cal.
To change Main Probe Cal.
parameter, press the set key.
To change AFT Probe Cal.
parameter, press the set key.
11
12
Function : To set Main(Liquid) probe
calibration.
Function : To set Antifreeze probe
calibration.
-10.0ºC
-10.0ºC
10.0ºC
10.0ºC
0.0ºC
0.0ºC
AFT DIFFERENTIAL
To change the AFT Differential
parameter, press the set key.
10
Function : To set fault resetting
differential once it tripped of Aft set point.
Use UP/DOWN keys to set desired value.
EXAMPLE : If the AFT set point is set at
5.0ºC and differential is set to 2.0ºC then
after tripping on AFT fault controller will
clear the AFT fault only when the AFT
Temperature goes above
7.0ºC(5.0ºC+2.0ºC).
1.0ºC 10.0ºC 2.0ºC
Range
Min Max Fact. Set
Range
Min Max Fact. Set
Range
Min Max Fact. Set
Sr.No.
Parameter (LCD Message)
Description of parameters and functions.
Parameter setting method.
Use UP/DOWN keys to set desired
value.
EXAMPLE : Same as Main Probe Cal.
To change Cond Probe Cal.
parameter, press the set key.
Range
Min Max Fact. Set
-10Amp 10Amp 0Amp
CURRENT CAL.
Once out of this mode controller will
display 10A.
Use UP/DOWN keys to set desired value.
EXAMPLE : If the actual current is 10A
and if controller is showing 9A ,then set
this parameter to 1A.
To change CT Cal.
parameter, press the set key.
14
Function : To set CT sensing calibration.
Range
Min Max Fact. Set
0
-10 C 0 10 C 0 0 C
COND PROBE CAL.
13
Function : To set Condensor probe
calibration.
15
Range
Min Max
0Min 99Min 20Min
HT POWER ON DLY Function : This sets Power ON delay for
high temperature alarm to avoid false
alarms.
To change HT Power On Dly
parameter, press the set key.
Use UP/DOWN keys to set desired value.
Fact. Set
Disable Enable Disable
COND PROBE ACTIVE
control.
Use UP/DOWN keys to set desired value.
control.
Enable = Enables condensor probe
Disble = Disables condensor probe
To change Cond Probe Enable
parameter, press the set key.
16
Function : To enable or disable condenser
probe.
Range
Min Max Fact. Set
NC-120A NC-120A

11
Sr.No.
Parameter (LCD Message)
Description of parameters and functions.
Parameter setting method.
COND. SET TEMP.
17
Function : To set Condenser set
temperature.
To change Cond. set temp.
parameter, press the set key.
Use UP/DOWN keys to set desired
value.
0
1 C 0
99 C 0
60 C
EXAMPLE : If this parameter is set to
60ºC then controller will trip the
compressor on Condenser High
temperature, if the Condenser sensor
goes above 60ºC.
Range
Min Max Fact. Set
0
1 C 0 10 C 0 2 C
To change Cond. set differential
parameter, press the set key.
COND. SET DIFF.
18
Function : To set differential for Condenser.
Use UP/DOWN keys to set desired
value.
Example: If condenser set temperature
0
is set to 60 C and condenser will trip
compressor when condenser
0
temperature goes above 60 C and will
reset only if temperature goes below
0
58 C.
Range
Min Max Fact. Set
12
Sr.No.
Parameter (LCD Message)
Description of parameters and functions.
Parameter setting method.
FAULT SENSE LOGIC
Use UP/DOWN keys to set desired value.
19
Function: To set tripping voltage of digital
inputs.
To change Fault sense logic
parameter, press the set key.
0Vac 230Vac 230Vac
Range
Min Max Fact. Set
voltage level.
230Vac .
0Vac = Controller will sense faults at 0
230Vac = Controller will sense faults at
20
Range
Min Max
Disable Enable Disable
FAULT IN STAND BY Function : This decides whether controller
should display faults in stand by mode or
not.
To change Fault in Stand By
parameter, press the set key.
mode.
Note : Eventhough the fault sensing is
disabled in satnd by controller will display
High temperature and low temperature
alarms and sensor fail alarms.
Enable = Faults are enabled in stand by
Disable = Faults are disabled in stand by
Use UP/DOWN keys to set desired value.
mode.
Fact. Set
LP SENSING DLY
Use UP/DOWN keys to set desired
value.
EXAMPLE: If this delay is set to
40seconds then the controller will ignore
Lp fault for 40 seconds after compressor
on it avoid false tripping of Compressor.
21
Function: To set LP fault sensing delay
on compressor on.
To change LP Sensing Dly
parameter, press the set key.
1sec 90sec 40 sec
Range
Min Max Fact. Set
Use UP/DOWN keys to set desired
value.
Auto = Sets HP-AFT faults as Auto
Manual = Sets HP-AFT faults as Manual
ressetable. User need to press
RST key To clear these faults.
ressetable.
To change HP-AFT Fault Reset
parameter, press the set key.
Range
Min Max Fact. Set
Manual Auto Auto
HP/AFT RESET
22
Function : This parameter will set HP
and AFT fault to Auto or Manual reset.
EXAMPLE : If this parameter is set to
60ºC then when condenser temperature
goes above 60ºC, display will show
COND HI TEMP.
NC-120A NC-120A

13 14
Sr.No.
Parameter (LCD Message)
Description of parameters and functions.
Parameter setting method.
Manual Auto Auto
LP FAULT RESET
resettable. User need to press
Auto = Sets LP faults as Auto resettable.
Use UP/DOWN keys to set desired value.
Manual = Sets LP faults as Manual
RST key To clear these faults.
To change LP fault reset
parameter, press the set key.
23
Function : This parameter will set LP
fault to Auto or Manual reset.
Range
Min Max Fact. Set
LIQUID LEVEL SENSOR
sensing.
sensing.
Use UP/DOWN keys to set desired value.
Enable = This will enable liquid level
Disable = This will disable liquid level
To change Liquid level
parameter, press the set key.
24
Function : This parameter enable /
disables liquid level sensing.
Disable Enable Disable
Range
Min Max Fact. Set
Function : This parameter configures
pump to keep always on or on/off with
compressor.
PUMP RUN LOGIC
25
To change Pump start
parameter, press the set key.
Use UP/DOWN keys to set desired
value.
Sr.No.
Parameter (LCD Message)
Description of parameters and functions.
Parameter setting method.
And if this delay is set to 10seconds then
condenser will switch on 10 seconds
before compressor.
Use UP/DOWN keys to set desired value.
If condenser is running with compressor
COND RUN LOGIC
always on.
With Comp = Condensor will switch on/
off with compressor.
Always On = Condensor will remain
Use UP/DOWN keys to set desired
value.
26
Function : This parameter configures
Cond to keep always on or on/off with
compressor.
Range
Min Max Fact. Set
To change Cond Start
parameter, press the set key.
Always
On
With
Comp
Always
On
COND START DLY.
27
Function: To set sensing delay of
condenser on compressor ON.
Range
Min Max Fact. Set
To change Cond Start Dly.
parameter, press the set key.
1sec 60sec 10 sec
Range
Min Max Fact. Set
Always
On
With
Comp
Always
On
Always On = Pump will remain always
on.
With Comp = Pump will switch on/ off
with compressor.
Use UP/DOWN keys to set desired
value.
Enable = To Enable Current Sensing.
Disable = To Disable Current Sensing.
To change Ct Enable
parameter, press the set key.
Range
Min Max Fact. Set
Disable Enable Disable
CURRENT INPUT
28
Function: To enable / disable Current
Sensing
NC-120A NC-120A

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Sr.No.
Parameter (LCD Message)
Description of parameters and functions.
Parameter setting method.
0 Ct Hi-1 5Amp
Ct+Lo+1 20 15Amp
CURRENT LO LIMIT
CURRENT HI LIMIT
Example : If this parameter is set to
5Amp then controller will trip compressor
on Underload fault incase it is drawing
less than 5 Ampere.
Use UP/DOWN keys to set desired
value.
To change Ct LO reset
parameter, press the set key.
To change Ct HI parameter,
press the set key.
29
30
Function : This parameter sets Low
current limit for the compressor below
which it will trip on “Underload” Fault.
Function : This parameter sets High
current limit for the compressor below
which it will trip on “Overload” Fault.
CURRENT RETRIALS
31
Function : No. of retrials before sensing
underload / overload fault in auto mode.
To change Ct retrials
parameter, press the set key.
Use UP/DOWN keys to set desired
value.
Range
Min Max Fact. Set
Range
Min Max Fact. Set
Use UP/DOWN keys to set desired value.
Example : If this parameter is set to
15Amp then controller will trip compressor
on Overload fault incase it is drawing
more than 15Ampere.
010 3
Range
Min Max Fact. Set
Sr.No.
Parameter (LCD Message)
Description of parameters and functions.
Parameter setting method.
35
EWFS NORMAL DLY Function : It sets normal delay for
EWFS fault sensing.This avoids false
tripping due to water splashing.
34
Range
Min Max
0Sec 120Sec 10Sec
EWFS STARTUP DLY Function : It sets power on delay for
EWFS fault sensing.
To change EWFS Startup Dly
parameter, press the set key.
Use UP/DOWN keys to set desired
value.
Fact. Set
33
CONFIG AUX I/P Function : This configures AUX i/p as
EWFS fault or as AUX i/p to switch off
whole system
Range
Min Max
AS EWFS AS AUX AS EWFS
To change CONFIG AUX I/P
parameter, press the set key.
Use UP/DOWN keys to set desired
value.
AS AUX = It will set i/p as Auxiliary fault.
AS EWFS = It will set i/p as EWFS fault.
This configures AUX i/p as EWFS fault
or as AUX i/p to switch off whole system
Fact. Set
To change Ct fault reset
parameter, press the set key.
CURRENT FAULT RST
32
Function : To set current faults for Auto /
Manual reset.
AutoManual Manual
Range
Min Max Fact. Set
If CT fault is set to Auto then after no. of
retrials compressor will trip on underload
or overload fault and go to manual reset.
Use UP/DOWN keys to set desired value.
If set to Manual in the first trip only
controller will trip on underload or
overload fault and go to manual reset.
Range
Min Max
0Sec 90Sec 5Sec
To change EWFS Normal Dly
parameter, press the set key.
Use UP/DOWN keys to set desired
value.
Fact. Set
NC-120A NC-120A

17 18
Sr.No.
Parameter (LCD Message)
Description of parameters and functions.
Parameter setting method.
Use UP/DOWN keys to set desired
value.
To change System Autostart
parameter, press the set key.
AUTOSTART
38
Function : To enable auto start of
controller at power on.
Example : If this mode is enabled,then
the compressor will remain in the on state,
while Precesion SV will switch on/off on
the set point to maintain the temperature
precisely.
Use UP/DOWN keys to set desired value.
PRECISION MODE
37
To change Precision Mode
parameter, press the set key.
Disable Enable
Function : To enable / disable Controller
to function in precision mode.
Disable
AUX I/P SETTING
36
To change Aux Input
parameter, press the set key.
Pump ON All OFF
Use UP/DOWN keys to set desired
value.
case of Auxilliary fault.
fault.
Pump On = Will keep pump running in
All Off = Trip whole system on Auxilliary
Function : This parameter will set pump
functioning incase of Auxiliary fault.
Pump ON
Range
Min Max Fact. Set
Range
Min Max Fact. Set
EnableDisable Enable
Store Clear Store
Sr.No.
Parameter (LCD Message)
Description of parameters and functions.
Parameter setting method.
KEYPAD LOCK
CLEAR FAULT LOG
Use UP/DOWN keys to set desired
value.
values.
Disable = Use can change the values.
Enable = All parameter are locked to set
parameter, press the set key.
To change Keypad Lock
To change Clear Fault Log
parameter, press the set key.
39
40
Function : To lock keypad.
Function : To clear last fault history
Range
Min Max Fact. Set
Range
Min Max Fact. Set
Use UP/DOWN keys to set desired
value.
Store = Store fault history
Example : If this parameter is set to
‘Clear”then it will clear all previous faults
saved in the memory. “Store” will save
last 15 faults.
Clear = Clear all previous fault history
Range
Min Max Fact. Set
Disable Enable Disable
Disable = Start Controller with power
key.
Enable = Auto start controller at power
on.
FACTORY DEFAULTS
41
Function : Revert to factory set parameter.
To change Factory Setting
parameter, press the set key.
Use UP/DOWN keys to set desired value.
Disable Enable Disable
Range
Min Max Fact. Set
To restore default settings of the
controller. When set to Enable, all
parameters are programmed to factory
settings. Used to debug setting related
problems.
PUMP RUN HRS
43
Use UP/DOWN keys to set desired value.
Function: To display total pump working
hours.
COMP RUN HRS
42
Function : To display total compressor
working hours
Use UP/DOWN keys to set desired value.
CLR COMP RUN HRS
44
Range
Min Max
parameter, press the set key.
To change Clear Comp Run
Store Clear
Use UP/DOWN keys to set desired
value.
Note : User need to connect prokey at
the back of the controller before entering
in to the program mode.
Function : To clear compressor run
hours
Fact. Set
Store
NC-120A NC-120A

19 20
Sr.No.
Parameter (LCD Message)
Description of parameters and functions.
Parameter setting method.
CLR PUMP RUN HRS
Use UP/DOWN keys to set desired
value.
Note : User need to connect prokey at
the back of the controller before entering
in to the program mode.
45
Function : To clear pump run hours.
Range
Min Max Fact. Set
parameter, press the set key.
To change Clear Pump Run Hrs
Store Clear Store
ENTER YOUR NAME
46
To change Enter Your Name
parameter, press the set key.
Use UP/DOWN keys to set desired
value.
Customer can set the name required to
display at controller power ON.
Function : To set customer name to be
displayed at controller power ON.
ENTER YOUR NO.
Use UP/DOWN keys to set desired value.
Customer can set service telephone
number which will display at power ON.
47
Function : To set customer service
number.
parameter, press the set key.
To change Enter Your No.
SET -EXIT
UP/DOWN - SCROLL
Once the SET key is pressed the control
goes into the normal mode and displays
the temperature.
48
Function : To end programming
To end Program mode press
set key.
3. Press Temp key to view ANTIFREEZE(AFT) & Condenser
4. Press Power Key to start or stop the chiller.
5. Press & key together for 2seconds to view fault history.
1. Press RST key to mute the alarm.
2. Press RST key for 4seconds to reset HP, LP, AFT faults in manual
reset.
Temperature.
RST
RST
Prb
Prg
Prb
2
RST Press for 4 seconds to reset HP, LP, AFT faults in manual reset.
Used in program mode and set mode to increment parameter
value.
Used to view to Antifreeze (AFT) Temperature & Condenser
Temperature.
Used to enter into the program mode.
Used in program mode and set mode to decrement parameter
value.
In program mode and set mode used to set the changed value
of parameter or to enter into set mode.
SET
Key Description
Key Functions :
SET
+Press DOWN PRG and SET keys simultaneously to start or
stop the chiller.
NC-120A NC-120A

21
Housing : ABS Plastic
Protection : IP54 Frontal
Dimensions : Front - 106.2 x 50 mm
Depth- 59 mm
Panel Cutout : 92 X 45 mm
Mounting : Flush panel mounting
Connection : Plugable Screw terminal blocks.
Display : 16x2 LCD
Data Storage : Non-Volatile EEPROM Memory
Power Input : 230Vac +/-10%, 50Hz
2
< 2.5mm one wire/terminal only.
0 0
Operating Temp : 5 C to 50 C(non-condensing)
Input : NTC Probe, SZ-N75
All Relay : 5A / 250Vac
Current Input : 0 to 20Amp.
0
Resolution : 0.1 C
0 0
Probe Tolerance : +/-0.3 C AT 25 C
0 0
Storage Temp : -20 C to 70 C(non-condensing)
0
Accuracy : +/-1 C
Resolution : 0.1Amp.
0 0
Range : -30.0 C to +50.0 C
Technical Data
22NC-120A NC-120A
PROKEY
28 29 30 31
MED HIGH GND CT
Suggested Wiring Diagram
PHASE NEUTRAL
1
2
1 4 8
259
3 6 10
711 1412 1513 16
17 24 25
19 23 2620 27
21 22
LIQUID
AFT.
COND.
NEUTRAL
COMP O/L
HP
LP
SPPR
PUMP O/L
AUX / EWFS
9VAC
18
PROBE
COMP PRE SV ALARMWATER
SV
PUMP
COND
COMP.
C NOC NOCNO
NCNO CNCNO C C NO
PRE SV.
COND.
PUMP
WATER SV.
PROKEY
28 29 30 31
MED
HIGH
GND
CT
LIQ
LEVEL
SWITCH

23 24
Panel Cutout & Dimensions
Note : All dimension are in mm.
59
92
92
45
Top View
Side Lock
CONTROLLER
PANEL
106.2
50
Front View
Max
15 mm
59
5045
WIRING : The probe and its corresponding wires should never be installed
in a conduit next to control or power supply lines. The electrical wiring
should be done as shown in the diagram. The power supply circuit should
be connected to a protection switch. The terminals admit wires of upto
2.5sq mm.
WARNING : Improper wiring may cause irreparable damage and personal
injury. Kindly ensure that wiring is done by qualified personnel only.
Maintenance : Cleaning : Clean the surface of the controller with a soft
moist cloth. Do not use abrasive detergents, petrol, alcohol or solvents.
Fixing and dimensions of panel models :To fix the unit, slide the side lock 1
through the guides 2 as per the position shown in the figure. Move the side
lock in the direction of the arrow, it permits to move the fastener in the opposite
direction of the arrow. 3 Fit the screw in the side lock in direction of the arrow to
hold the controller in the panel.
Installation
Controller
Controller should be installed in a place protected by vibration, water and
corrosive gasses and where ambient temperature does not exceed the values
specified in the technical data.
Probe
To give a correct reading, the probe must be installed in a place protected from
thermal influences, which may affect the temperature to be controlled.
CAUTION
NC-120A NC-120A

25
The information in this document is subject to change in order to improve
reliability , design or function without prior notice and does not represent a
commitment on the part of the company. In no event will the company be liable
for direct, indirect, special, incidental or consequential damage arising out of
the use or inability to use the product or documentation, even if advised of the
possibility of such damages. No part of this manual may be reproduced or
transmitted in any form or by any means without the prior written permission of
the company.
Notice
Disclaimer
Warranty
This product is warranted against defects in materials and workmanship for a
period of one year from the date of purchase. During the warranty period,
product determined by us to be defective in form or function will be repaired or,
at our option, replaced at no charge. This warranty does not apply if the product
has been damaged by accident, abuse, and misuse or as a result of service or
modification other than by the company. This warranty is in lieu of any other
warranty expressed or implied. In no event shall the company be held liable for
incidental or consequential damages, such as lost revenue or lost business
opportunity arising from the purchase of this product.
INDIA
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Globe Valves
Hand Valves
Flow Switches
Solenoid Valves
OUR OTHER PRODUCTS
Cold Room Controller
Chiller Controller
Two Compressors Controller
Heating Controller
Humidity Controller
Pressure Controller
R
00 / 11.08.16
This manual & its contents remain the sole property of PVR Controls, India and
shall not be reproduced or distributed without authorization. Although great
care has been taken in the preparations of this document, the company or its
vendors in no event will be liable for direct, indirect, special, incidental or
consequential damage arising out of the use or inability to use the product or
documentation, even if advised of the possibility of such damages. No part of
this manual may be reproduced or transmitted in any form or by any means
without the prior written permission of the company. PVR Controls reserves the
right to make and changes or improvements without prior notice.
NC-120A