Sub-Zero CRC-2020 User manual

AMP
CRC-2020

Index Index
01 02
Index Index
Introduction
Get to Know Your Controller
LED Indication.
4
7
Parameter List.
Key Introduction 5
3
Fault Messages. 6
DESCRIPTION
PARAMETER
Pg.
No.
To set the cut-out point of the controller.
SET POINT 8
DESCRIPTION
PARAMETER
Pg.
No.
Items Included. 4
8
To set other parameter 8
To set allowable high temperature limit.
To set allowable low temperature limit.
To set the differential for compressor
restart.
P2
P3
P4
9
9
10
To set probe calibration.P5 10
To set time delay between relay restart
time.
P6 10-11
To set duration of defrost.P7 11
To set defrost frequency.
To set power on defrost delay.
P8
P9
11
11
To enable / disable buzzer.BUZ 12
This parameter is used to set power on
delay for alarm.
AL 12
Under load limit for compressor current.C-UL 12
Over load limit for compressor current.C-OL 13
Current sensing delay.
C2 13
To enable or Disable HP sensing.
D0 13
To enable or disable LP sensing.
D1 14
Fault sensing logic.
D2 14
To set LP sensing delay.
To set reset mode for HP fault.
D3
D4
14
15
15
To set Compressor Relay status on
Probe Failure.
To set On cycle at room probe fail.
To set Off cycle at room probe fail.
To set Display at defrosting.
E1
TON
TOFF
E7
16
16
16
16
To set time delay to switch off the light .
To change password.
To view Compressor run Hours.
Clear Compressor Run Hours.
To set Unit ID.
LD
PW
CRH
CCRH
Unit ID
17
17
17
17
18
To activate Keypad Lock.
To enable/disable Power Switch.
To set display at power OFF mode.
LP
PO
PDIS
18
18-19
19
To restore default settings of the
controller.
FS 19
End of programming.
EP 19
Technical Data 20
Caution & Warranty
21
30-31
Suggested Wiring Diagram
DI-D
OPS
To select AUX or compressor thermal
trip digital I/P
To Enable / Disable Oil Pressure Switch
(OPS) I/P.
15
21-28
Instruction manual for VMRC-10/3
CRC-2020 CRC-2020
29

04
03
Introduction
Features:
The CRC-2020 is single set point cold room controller. The
Sub-Zero CRC-2020 is aesthetically superior versions of their
predecessors.
A series of “safety controls” (delay at start-up, minimum disable
time, minimum time between activation) protects the
compressors from close starts. In case of probe error or
temperature alarm, the instrument signals the event through
acoustic signal and by closing the relay contact. By pressing
the mute key, the buzzer is silenced.
A number of parameters are displayed alphanumerically to set
up the instrument for each specific function.
The CRC-2020 controller can be used for several applications
with a measuring range from
O O
-50.0 C to 50.0 C.
Computer Connectivity over RS485 and Remote
monitoring(Optional).
The controller controls the defrost in the system based on time
based where the compressor is stopped. It is also possible to
select the interval between defrosts and a maximum time out
after which the defrost is interrupted.
There are safety features which include shutting down the
system incase of a fault from a pressure control or similar
device.
Get to Know Your Controller
Items included
NO.
1.
2.
3.
4.
QTY
ITEMS
CONTROLLER
CATALOGUE
NTC SENSOR 5 METER
1
1
1
4
8 X 38 SCREW WITH RAWL PLUG
CRC-2020 CRC-2020
CRC-2020
R Y B

06
05 CRC-2020CRC-2020
Key Introduction
FLT LOG
Used to switch OFF/ON the controller.
Used to come mute the buzzer/Alarm & to exit any mode.
Used to increment/scroll in Program Mode.
When not in any mode if this key is pressed for 2 secs controller will
enter in fault log mode.
PRG
Used to enter into the Set mode. Also used as enter key if controller
is in Set mode/program mode.
Used to enter in manual defrost and to stop defrost if
defrosting is ON.
Used to decrement/scroll in Program mode.
Used to enter into the program mode.
Used to switch OFF/ON the light.
Used to enter into the Amp. mode where compressor current can
be viewed.
AMP
High temperature alarm for Room means, room temperature is
equal or above the set value of P2 parameter.
Low temperature alarm for Room means, room temperature is
equal or below the set value of P3 parameter.
Ht
Lt
Room temperature fail means, Room sensor not connected or
out of range.
PP
SPPR Fault.
Compressor over load fault.
SPPR
C-OL
Compressor under load fault.
C-UL
Fault Messages :
HP fault.
HP
Auxiliary fault / Compressor Thermal Fault .
LP fault.
LP
AUX / CTH
Door Open fault.
DO
OPS Oil Pressure Switch Fault.

08
07
Min: MINIMUM Max : MAXIMUM
Fact. Set : FACTORY SETTING(DEFAULT)
Sr.
No.
Parameter setting method
Description of parameters and functions.
Parameter
To set other parameter
Press & hold SET key for
2 seconds
Display will show ‘SET’ and scroll the
description of the parameter.
To go to other parameters, use UP /
DOWN keys.
SP To set the cut-out point of the controller.
Display will change to set value.
The set point value can now be changed by
using the UP/DOWN key. After desired
value, press the SET key & you will see “--”
which confirms that the set point has been
stored in memory.
01
To change Set Point parameter,
press the set key.
P3+0.5ºC P2-0.5ºC 0.0ºC
Range
Min Max Fact. Set
To set other parameter
Press & hold PRG key for
2 seconds
Display will show ‘P2’ and scroll the
description of the parameter.
To go to other parameters, use UP /
DOWN keys.
PRG
LED Indication
Messages Mode Discription
Comp. Relay On.
Comp. Relay Off.
Comp. Relay Timedelay.
Defrost On.
Defrost Off.
Defrost in Timedelay.
Alarm Relay On.
Alarm Relay Off.
Power Off.
Power On.
Light Relay On.
Light Relay Off.
R-phase present.
R-phase absent.
R
Y-phase present.
Y-phase absent.
Y
B-phase present.
B-phase absent.
B
On
Off
Flashing
On
Off
Flashing
On
Off
Off
On
On
Off
On
Off
On
Off
On
Off
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Sr.
No.
Parameter setting method
Description of parameters and functions.
Parameter
01
P2
Parameter
Function : To set allowable high
temperature limit.
To change P2 parameter,
press the set key.
Use UP/DOWN key to set desired value.
Once set at a particular value, this will not
allow the set point to go above this
value and below P3 setting.
Example : Setting this parameter
0
at 50.0 C will not allow the set point to go
0
above 50.0 C also if the temperature
0
reaches 50.0 C, the display will show HT
(High Temperature). The alarm will be
ON. But at power on till the AL delay is
over controller will not generate HT Alarm.
SP+0.5ºC 50.0ºC 50.0ºC
Range
Min Max Fact. Set
(Message on Display)
09
Sr.
No.
Parameter setting method
Description of parameters and functions.
Parameter
02
P3
Parameter
Function : To set allowable low
temperature limit.
Use UP/DOWN key to set desired value.
Once set at a particular value, this will not
allow the set point to go below this value
and above P2 setting.
Example : Setting this parameter at
0
-50.0 C will not allow the set point to go
0
below -50.0 C also if the temperature
0
reaches -50.0 C, the display will show LT
(Low Temperature). The alarm will be ON.
To change parameter,
press the set key.
P3
-50.0ºC SP-0.5ºC -50.0ºC
Range
Min Max Fact. Set
(Message on Display)
Use UP/DOWN keys to set desired value.
Example(Cooling Mode) : If the set point
0
is set at 10.0 C and differential is set at
0
2.0 C, then when the system reaches
0
10.0 C, the comp. relay will cutout. Since
0
the differential is 2.0 C, the comp. Relay
0
will cutin at 12.0 C
0 0
(10.0 C + 2.0 C).
03
P4
Parameter
Function : To set the differential for
compressor restart.
To change P4
press the set key.
parameter,
0.5ºC 20.0ºC 2.0ºC
Range
Min Max Fact. Set
P5
Parameter
Use UP/DOWN keys to set desired value.
In time it may be possible that the display
may be offset by a degree or so.
To compensate for this error, you may
need to add or minus the degrees
required to achi eve t he co rrect
temperature.
Example : The temperature on the
O
display is 28.0 C, whereas the actual
O
temperature is 30.0 C. You will need to set
O
this parameter to 2.0 C, which means that
once out of the programming parameter,
the display will show the temperature
O O O
30.0 C (28.0 C + 2.0 C).
To change P5
press the set key.
parameter,
04
Function : To set probe calibration.
-10.0ºC 10.0ºC 0.0ºC
Range
Min Max Fact. Set
HT
LT Use UP/DOWN keys to set desired value.
This parameter is used to protect the fan
from restarting in a short period of time
and can be set between 0 to 20 minutes.
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, even if the
differential is achieved earlier. This
P6
Parameter
To change P6
press the set key.
parameter,
05
Function : To set time delay between
relay restart time.
1 Min 20 Min 3 Min
Range
Min Max Fact. Set
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11
Sr.
No.
Parameter setting method
Description of parameters and functions.
Parameter
parameter is good to protect the life of
the compressor when there are power
fluctuations and the compressor is
switched off and on within a few seconds.
Sr.
No.
Parameter setting method
Description of parameters and functions.
Parameter
P7
Parameter
06
Function : To set duration of defrost.
To change the P7 Parameter
parameter, press the set key.
Use UP/DOWN keys to set desired value.
0 Min 99 Min 30 Min
Range
Min Max Fact. Set
This is maximum amount of time allowed
for defrost. If set to 0, there will be no
defrost cycle.
Example : If P7 is set to 30 Mins and P8
parameter is set to 1 Hr. then after every 1
Hr defrosting will take place for 15 mins.
P8
Parameter
07
Function : To set defrost frequency.
To change the P8 Parameter
parameter, press the set key.
Use UP/DOWN keys to set desired value.
1 Hr 31 Hrs 6 Hr
Range
Min Max Fact. Set
This is the amount of time between two
defrost cycles.
Example : same as P7 parameter.
P9
Parameter
08
Function : To set power on defrost delay.
To change the P9 Parameter
parameter, press the set key.
Use UP/DOWN keys to set desired value.
0 Min 99 Min 30 Min
Range
Min Max Fact. Set
This is the amount of time at power on
after which defrosting will take place
once.
Example : If P9 parameter is 30 mins
then at power after 30 mins defrosting will
take place once.
BUZ
Parameter
09
Function : To enable / disable buzzer.
To change the BUZ Parameter
parameter, press the set key.
Use UP/DOWN keys to set desired value.
DIS ENB ENB
Range
Min Max Fact. Set
Example:
ENB : Buzzer enabled.
DIS : Buzzer disabled.
AL
Parameter
10
Function : This parameter is used to set
power on delay for alarm.
To change the AL Parameter
parameter, press the set key.
Use UP/DOWN keys to set desired value.
0 Min 99 Min 30 Min
Range
Min Max Fact. Set
Example : If you set this parameter to 30,
once the power is switched on, the alarm
will not activate for 30 minutes after the
power is switched on. This is most useful
to avoid the nuisance alarms when the
ambients are high when the machine is
switched on after a long time.
C-UL
Parameter
11
Function : Under load limit for compressor
current.
To change the C-UL parameter,
press the set key.
Use UP/DOWN keys to set desired value.
Example : If C-UL= 1.0A and compressor
current is less than 1.0A then and exists till
C2 current sensing delay then it is
registered as UL fault. Compressor will
get OFF on this fault. If after 3 retries
within 1 Hour current drawn is still less
than 1.0Amp the controller will trip the
compressor on fault and activate
respective alarm relay. Also display will
flash ‘C-UL’. Controller will go in manual
reset mode.
0.0A (C-OL
-1.0)A
1.0A
Range
Min Max Fact. Set
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Sr.
No.
Parameter setting method
Description of parameters and functions.
Parameter
Sr.
No.
Parameter setting method
Description of parameters and functions.
Parameter
C-OL
Parameter
12
Function : Over load limit for compressor
current.
To change the C-OL parameter,
press the set key.
Use UP/DOWN keys to set desired value.
Example : If C-OL= 10 A and compressor
current is greater than 10 A then and exist
till C2 current sensing delay then C-OL
fault exists and flash on display.
Compressor will be tripped on this fault.
NOTE : According to the compressor
current, set Overload value.
(C-UL
+1.0) A
30.0A 10.0A
Range
Min Max Fact. Set
Use UP/DOWN keys to set desired value.
Example : If C2 = 5 sec then, any current
fault will be valid only when it exists for
more than 5 sec.
To change the C2 parameter,
press the set key.
C2
Parameter
13
Function : Current sensing delay.
5 Sec 60 Sec 5 Sec
Range
Min Max Fact. Set
Use UP/DOWN keys to set desired value.
Example :
If this parameter is set to
ENB : HP sensing is enabled.
DIS : HP sensing is disabled
Setting this parameter to disable will
ignore HP fault for compressor. If this
parameter is set to Enable then controller
will detect HP trip.
To change the D0 parameter,
press the set key.
D0
Parameter
14
Function : To enable or Disable HP
sensing.
DIS ENB ENB
Range
Min Max Fact. Set
Use UP/DOWN keys to set desired
value.
Example:
If this parameter is set to
ENB : LP sensing is enabled.
DIS : LP sensing is disabled.
To change D1
parameter, press the set key.
DIS ENB
D1
Parameter
15
ENB
Function : To enable or disable LP
sensing.
Range
Min Max Fact. Set
D2
Parameter
16
To change D2 parameter,
press the set key.
0V 230V
Function : Fault sensing logic.
0V
Use UP/DOWN keys to set desired
value.
0V : 0V at HP/LP/AUX input will be
sensed as fault and trip the
compressor.
230V : 230V at HP/LP/AUX input will be
sensed as fault and trip the
compressor.
Range
Min Max Fact. Set
Setting this parameter to disable will
ignore LP fault for compressor. If this
parameter is set to Enable then controller will
detect LP trip.
To change D3 parameter,
press the set key.
0 Sec
17
MinMin
Use UP/DOWN keys to set desired value.
Example : If this parameter is set to 30
sec, then LP fault will be sensed only
when it present continuously for 30 Secs.
180 Sec 30 Sec
D3
Parameter
Function : To set LP sensing delay.
Range
Max Fact. Set
Range
Max Fact. Set
18.0A
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Sr.
No.
Parameter setting method
Description of parameters and functions.
Parameter
Sr.
No.
Parameter setting method
Description of parameters and functions.
Parameter
To change D4 parameter,
press the set key.
D4
Parameter
18
Function : To set reset mode for HP fault.
MAN AUTO AUTO
Range
Min Max Fact. Set
Range
Min Max Fact. Set
Use UP/DOWN keys to set desired
value.
MAN : Manual Mode.
AUTO : Auto mode.
To change E1 parameter,
press the set key.
E1
Parameter
21
Range
Min Max Fact. Set
Range
Min Max Fact. Set
When set to
ON : Relay will stay ON.
CYC : Relay performs a duty cycle of
as per TON & TOFF .
OFF : Relay will stay OFF.
ON OFF CYC
Function : To set Compressor Relay
status on Probe Failure.
Use UP/DOWN keys to set desired
value.
To change TON parameter,
press the set key.
TOFF
Parameter
23
Range
Min Max Fact. Set
Range
Min Max Fact. Set
At room probe fail condition when E1
parameter is selected as 'CYC' then the
Off cycle is specified by Ton parameter.
1 Min 30 Min 4 Min
Function : To set Off cycle at room probe
fail.
Use UP/DOWN keys to set desired
value.
E7
Parameter
Use UP/DOWN keys to set desired
value.
TEMP : At defrosting temperature
will be dispalyed.
DEFR : At Defrosting 'Defrost ON'
will scroll.
24
Function : To set Display at defrosting.
To change E7 parameter,
press the SET key.
TEMP DEFR TEMP
Range
Min Max Fact. Set
Range
Min Max Fact. Set
DI-D
Parameter
19
Function : To select AUX or compressor
thermal trip digital I/P
To change the DI Parameter
parameter, press the set key.
Use UP/DOWN keys to set desired
value.
If Selected as “AUX” then at fault it will
display "AUX” on display.
If Selected as “CTH” then at fault it will
display “CTH”.
Range
Min Max Fact. Set
AUX CTH AUX
OPS
Parameter
20
Function : To Enable / Disable OPS I/P.
To change the OPS Parameter
parameter, press the set key.
Use UP/DOWN keys to set desired
value.
ENB : OPS I/P is enabled.
DIS : OPS I/P is disabled.
Range
Min Max Fact. Set
DIS ENB ENB
If this parameter set to “MAN” mode HP
fault will be cleared only after pressing
reset key for 2 seconds.
If this parameter is set to “AUTO” mode
HP fault will be cleared automatically
when it is healthy.
To change TON parameter,
press the set key.
TON
Parameter
22
Range
Min Max Fact. Set
Range
Min Max Fact. Set
At room probe fail condition when E1
parameter is selected as 'CYC' then the
on cycle is specified by Ton parameter.
1 Min 30 Min 10 Min
Function : To set On cycle at room
probe fail.
Use UP/DOWN keys to set desired
value.
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18
17
Example : If this parameter is set to 7 mins
then, when light is switched on after 7 mins
it will be switch off automatically.
LD
Parameter
Use UP/DOWN keys to set desired value.
This parameter is used set the time delay
to automatically switch off the light. If LD is
set to 0 then this parameter is disabled.
25
Function : To set time delay to switch off
the light .
To change LD parameter,
press the SET key.
0 Min 30 Min 7 Min
Range
Min Max Fact. Set
Range
Min Max Fact. Set
Sr.
No.
Parameter setting method
Description of parameters and functions.
Parameter
Sr.
No.
Parameter setting method
Description of parameters and functions.
Parameter
09999 0000
To change the PW parameter,
press the set key.
PW
Parameter
26
Function : To change password.
Use UP/DOWN key to change the
password.
User can enter into program mode
only if correct password is entered. If the
password is wrong it will show ‘INVALID
PASSWORD’.
Range
Min Max Fact. Set
Range
Min Max Fact. Set
CRH
Parameter
27
Function : To view Compressor run Hours.
It will display compressor run hours. It's
a read only parameter.
ID
Parameter
This parameter is used to set the Unit ID
of the device.
29
Function : To set Unit ID.
To change Unit ID
parameter, press the SET key.
1 240 -
Range
Min Max Fact. Set
Range
Min Max Fact. Set
NO YES NO
CCRH
28
Function : Clear Compressor Run
Hours.
If this parameter is set to ‘YES’
compressor run hours (CRH) are
cleared.
Range
Min Max Fact. Set
Range
Min Max Fact. Set
LP
30
To change LP parameter,
press the set key.
NO YES NO
Function: To activate Keypad Lock.
This parameter can lock the keypad so
that tempering is not possible by by-
standers.
NO : deactivates keypad lock.
YES : activates keypad lock.
On activation, all the parameters can only
be viewed, but not modified.
If the keypad is locked “LOCK” message
will be displayed..
Range
Min Max Fact. Set
Range
Min Max Fact. Set
DIS ENB DIS
To change PO parameter,
press the SET key.
PO
Parameter
Function : To enable/disable Power
Switch.
Use UP/DOWN keys to get desired
value & press SET key to confirm.
DIS : Disable power switch
ENB : Enables power switch
23
31
Range
Min Max Fact. Set
Range
Min Max Fact. Set
Controller has power switch, which if
enable puts controller in active or stand by
state.
If press foe 2 seconds controller will go in
stand by state.
if press for 2 seconds controller will go in
stand by mode, display will be as per
“PDIS” parameter.
To again switch to ACTIVE WORKING
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19
Sr.
No.
Parameter setting method
Description of parameters and functions.
Parameter
LED TEMP LED
To change PDIS parameter,
press the SET key.
PDIS
Parameter
Function : To set display at power OFF
mode.
Use UP/DOWN keys to set desired value.
At power OFF mode power OFF LED
will glow & display will be as below,
LED : Display Will be Blank.
OFF : Display will show OFF.
TEMP : Display will show Temperature.
23
32
Range
Min Max Fact. Set
Range
Min Max Fact. Set
MODE, press power switch again for 2
seconds. All leds and display will flash and
enter into NORMAL WORKING MODE.
NO YES NO
To change FS parameter,
press the SET key.
FS
Parameter
Function : To restore default settings of
the controller.
Use UP/DOWN keys to set desired value.
When set to YES all parameters
are programmed to factory
values.
Useful to debug setting related
problems.
23
33
Range
Min Max Fact. Set
Range
Min Max Fact. Set
EP
Parameter
Once the set key is pressed, the
controller goes into the normal mode
and displays the Room Temperature and
all settings are recorded.
34
Function: To exit programming.
To exit programming
parameter, press the SET key.
20
CRC-2020
Technical Data
Housing : Plastic / Sheet Metal (as per customer
requirement)
Dimensions : Plastic : (H)400 x (W) 300 x (D)135 mm
Sheet Metal : (H)450 x (W) 400 x (D)200 mm
Mounting : Wall mounting.
Connection : Spring clamp terminal block.
4 sq. mm wire.
Display : 4 Digit, 1” Dot matrix Display and 8 LEDs for
indication.
Data Storage : Non-Volatile EEPROM Memory.
Power Input (Options) : 415Vac +/-10%, 50-60Hz.
3Phase Supply with Neutral
0 0
Operating Temp : 5 C to 50 C(non-condensing).
0 0
Storage temp : -20 C to 70 C(non-condensing).
Output :
5A/230vac
5A/230vac
Light Relay : 5A/230Vac.
Alarm Relay : 5A/230Vac.
Sensors :
1) Temperature sensor:
0
Resolution : 0.1 C.
0
Accuracy : +/-1 C.
0 0
Probe Tolerance at 25 C : +/-0.3 C.
0 0
Range : -50.0 C to 50.0 C.
Analog I/p:
Compressor current (R,Y,B)
Resolution : 0.1Amp.
Accuracy : +/-1 Amp.
Digital Inputs:
HP, LP, Auxillary, Door, Sppr, OPS, R-Ph, Y-Ph, B- Ph.
Buzzer : Internal
RS485 Connectivity : Modbus RTU Protocol
Baud Rate : 9600
Device ID : 1 (By Default)
Compressor Relay :
Evap. Relay :
Sensor Type : NTC Thermistor.
CRC-2020

Introduction
22
VMRC-10/3 is three phase Line voltage monitor (LVM) used to protect device
from Single Phasing, voltage unbalance, phase reversal and under/over
voltage. It shows real time voltages between phase and neutral.
There is an Output of alaram relay is given to the controller as SPPR input.
Features are easily understood by examples in the instruction below.
VMRC-10/3
Get to Know Your Controller
Index
21
Index
To set Reference Voltage. 23
23
DESCRIPTION
PARAMETER
Pg.
No.
To set program mode. 23
To set Undervoltage Limits.
25
To set Un Balance Value.
To set Time Delay.
25
To set Calibration of Voltage.
To set Calibration of Voltage.
To set Calibration of Voltage.
To set Display mode.
25
26
24
24
24
26
26
27
To Restore factory defaults.
End programming.
To set Overvoltage Limits.
28
28
Technical Data.
Front View & Connection Diagram.
To set fault recover delay.
Get to know your Controller. 22
Introduction 22
VMRC-10/3
Instruction Manual
LVM (Line Voltage Monitor) Three Phase VMRC-10/3
VMRC-10/3
RELAY
NCCNO
78 9
R
15 17 19 18 21
Y B N

Sr.
No.
Parameter setting method
Description of parameters and functions.
Parameter
01
Function : To set Reference voltage.
To change the rEF Parameter,
press the set key.
381V 415V 415V
Range
Min Max Fact. Set
02
Function : To set Overvoltage Limits.
To change the oV parameter,
press the set key.
5V 75V 35V
Range
Min Max Fact. Set
To set other parameter
Press & hold PRG key for
2 seconds
Display will show ‘rEF’ and scroll the
description of the parameter.
To go to other parameters,
use up / down keys.
Parameter
Parameter
Use UP/DOWN keys to set desired
value.
If the a/c voltages goes above this
limit will trip respective a/c on
Overvoltage(”Ov”) fault.
Example : Over voltage is calculated
depending on Reference voltage + Ov
value. i.e, Ov Set Point = Ref + Ov , When
controller trip on Ov Fault it will recover
when input voltage fall below (Ref - (Ov
/2).
23
Parameter
Parameter
Sr.
No.
Parameter setting method
Description of parameters and functions.
Parameter
03
Function : To set Undervoltage Limits.
To change the uV parameter,
press the set key.
5V 75V 35V
Range
Min Max Fact. Set
04
Function : To set Un Balance value.
To change the unb parameter,
press the set key.
10V 120V 60V
Range
Min Max Fact. Set
Use UP/DOWN keys to set desired value.
If the a/c voltages goes below this
limit will trip re spective a/c on
undervoltage(”Uv”) fault.
Example : Under voltage is calculated
depending on Reference voltage - Uv
value. i.e Uv Set Point = Ref - Uv , When
controller trip on Uv Fault it will recover
when input voltage above (Ref – (Uv /2).
Use UP/DOWN keys to set desired
value.
Unbalance fault raised when voltage
difference between any of two phases
goes above Unb value and recovers when
the difference is less than (UNB/2).
Parameter
05
Function : To set time delay.
To change the ttd parameter,
press the set key.
0Sec 60Sec 10Sec
Range
Min Max Fact. Set
Use UP/DOWN keys to set desired
value.
Time delay provided to avoid false
triggering, when any fault last more than
TTD value then only fault is raised and this
fault is applicable to Under voltage, Over
voltage and Unbalance fault.(i.e., In case
of Phase Loss or Phase sequence fault
alarm will come immediately).
24
VMRC-10/3 VMRC-10/3
Use UP/DOWN keys to set desired value.
Base reference voltage to calculate under
voltage and over voltage values.
Min and Max value will change
according to display type for settings.
Example : If dsP is L-L then Min= 381V,
Max= 415V.

Sr.
No.
Parameter setting method
Description of parameters and functions.
Parameter
-15V 15V 0V
08
Function : To set calibration of voltage
for y-b or y-n phase.
To change the Cyb parameter,
press the set key.
Range
Min Max Fact. Set
Parameter
Use UP/DOWN keys to set desired
value.
This parameter provided to calibration
voltage reading.
When dsP is L-L then it sets calibration for
y-b.
When dsP is L-n then it sets calibration for
y-n.
Parameter
Use UP/DOWN keys to set desired
value.
This parameter provided to calibration
voltage reading.
When dsP is L-L then it sets calibration for
r-b.
When dsP is L-n then it sets calibration for
b-n.
-15V 15V 0V
09
Function : To set calibration of voltage
for r-b or b-n phase.
To change the Crb parameter,
press the set key.
Range
Min Max Fact. Set
10
Function : To set view display mode.
To change the dsP parameter,
press the set key.
L-L L-n L-L
Range
Min Max Fact. Set
Parameter
Use UP/DOWN keys to set desired
value.
There are two type of display output, Line
to Line Voltage (L-L) and Line to Neutral
(L-n), Depending on this parameter REF
parameter also changes.
26
Sr.
No.
Parameter setting method
Description of parameters and functions.
Parameter
06
Function : To set fault recover delay.
To change the tdr parameter,
press the set key.
0Sec 240Sec 10Sec
Range
Min Max Fact. Set
Parameter
Use UP/DOWN keys to set desired
value.
Time delay provided to add delay in fault
recover time, to avoid sudden fault
triggering and reset.
25
07
To change the CrY Parameter,
press the set key.
-15V 15V 0V
Range
Min Max Fact. Set
Function : To set calibration of voltage
for r-y or r-n phase.
Parameter
Use UP/DOWN keys to set desired
value.
This parameter provided to calibration
voltage reading.
When dsP is L-L then it sets calibration for
r-y.
When dsP is L-n then it sets calibration for
r-n.
VMRC-10/3 VMRC-10/3
nO YES nO
11
Function : To restore the default settings
of the controller.
To change the FS parameter,
press the set key.
Range
Min Max Fact. Set
Use UP/DOWN keys to set desired
value.
When set to 1, all parameters are
programmed to factory values.

Sr.
No.
Parameter setting method
Description of parameters and functions.
Parameter
27
Once the set key is pressed, the controller
goes into the normal mode and displays
the voltage readings.
Parameter
12
Function :To end programming.
To change the end parameter,
press the set key.
VMRC-10/3 VMRC-10/3 28
Technical Data
Three Phase Voltage Monitor (VMRC- 10/3)
Front View & Connetion Diagram for
1 2
RELAY
NCCNO
378 9
R
15 17 19 18 21
Y B N
Main Functions : Voltage Monitoring.
Phase Sequence Monitoring.
Phase Loss and Phase Unbalance detection.
Uv and Ov Detection.
Settable Uv and Ov Parameter.
Dimensions : Front : 69.3mm X 44.3mm,
Depth : 72.3 mm
Input : R, Y, B Phases and Neutral Input.
Output : Alarm Relay : 5A Resistive.
Application :Voltage and phase sequence monitoring and controlling.
Under voltage and Over voltage detection.
General Specification :
Input Voltage Range from 100VAC to 265VAC.
Mounting : Din rail mounting.
Connections : Screw terminals : < 2.5sqmm one wire/terminal only.
VMRC-10/3

29

31
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.
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.
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
CRC-2020
30
CRC-2020
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 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.
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.

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