Sub-Zero MICRO CHILL User manual

www.pvrcontrols.com
INDIA

IndexIndex
DESCRIPTION
PARAMETER
Pg.
No.
To set LP fault sensing delay on
compressor on.
LP SENSING DLY 11
This parameter will set HP and AFT fault
to Auto or Manual reset.
HP / AFT RESET 11
This parameter will set LP fault to Auto
or Manual reset.
LP FAULT RESET 11
PUMP POWERON DLY This parameter is used to set delay for
pump to start at power on. This is
applicable if the pump is running with
compressor.
13
This parameter enable/ disables liquid
level sensing.
LIQ LEVEL SENSOR 12
This parameter configures system to auto
start or manual start on power on.
SYSTEM AUTOSTART 12
This parameter configures pump to keep
always ON or OFF with compressor.
PUMP RUN LOGIC 12
This parameter configures Relay3.
RELAY3 LOGIC 13
CLEAR FAULT LOG This parameter is used to clear all fault
history.
13
KEYPAD LOCK To lock keypad. 14
FACTORY SET Revert to factory set parameter. 14
COMP RUN HRS This parameter is used to display
compressor working hours.
14
PUMP RUN HRS This parameter is used to display pump
working Hours.
14
UP/DOWN SCROLL
SET-EXIT To end programming. 14
Technical Data 15
Suggested Wiring Diagram 16
Panel Cutout & Dimensions 17
2
LIQ LEVEL FAULT To set liquid level fault on high level or low
level. 12
1
IndexIndex
Introduction
Get to Know Your Controller
Parameter List
4
6
To set the cutout point of the Controller.
To set other parameters
6
Key Introduction 5
3
DESCRIPTION
PARAMETER
Pg.
No.
To set Chiller Set point.
CHILLER SET TEMP.
6
6
Items Included 4
To set compressor restart delay.
COMP. TIME DELAY 7
To set temperature differential for
compressor restart.
To set maximum allowable high
temperature limit and alarm.
To set Power on delay for Ht alarm.
DIFFERENTIAL
HIGH TEMP. ALARM
HT PWR ON DLY
7
7
8
To set minimum allowable low
temperature limit and alarm.
To enable or disable Antifreeze
function.
LOW TEMP ALARM
AFT PROBE STATUS
8
8
To set fault resetting differential for AFT
set point.
AFT DIFFERENTIAL 9
To set Main(Liquid) probe calibration.
To set Antifreeze probe calibration.
To set tripping voltage digital inputs.
To set WFS trip sensing delay on power
up.
MAIN PROBE CAL
AFT PROBE CAL
FAULT SENS LOGIC
WFS PWR ON DLY
9
10
10
10
To set Antifreeze tripping set temp.
AFT SET TEMP 9
WORKING MODE To set Heating or Cooling function.
To set WFS trip sensing delay.
WFS NORMAL DLY 10
SET MODE
CHILLER SET TEMP.

ITEMS QTY
NO.
1. 1 SET
LIQUID LEVEL SENSOR
Optional :
4
QTY
1 No.
2 Nos
2 No
1 No
NO.
1.
2.
3.
4.
ITEM
CONTROLLER
SIDE CLAMPS
TEMPERATURE SENSOR
CATALOG
ITEMS INCLUDED
3
INTRODUCTION
=7-segment Display , Leds ,LCD with backlighting
to display all parameters.
=2 NTC probes for Liquid temp + Antifreeze
temperature.
=Range : - 30ºC to + 70 ºC
=Last 10 Fault History.
=Auto/Man reset for HP,LP and AFT .
=Relay outputs: Compressor + Pump + Alarm or
Water Sv.
=HP,LP,Comp O/L,Pump O/L, SPP,Cond O/L,
EWFS,CWFS trip protection for Compressor.
FEATURES
The “MICRO CHILL” is a (Single compressor) chiller controller
. This integrates all the required functions of the chiller.
It is very user friendly due to the LCD provided which gives all
the parameters, messages, alarms etc on the display. In
addition to the LCD there are LED's provided for instant status
on all controls in the system.
Water temperature according to the user’s Location of
the sensor.
Protection of the compressor with indication of any
possible fault.
Display of Chiller status on LCD and temperature on
LED display.
System’s Functions :
The system controls and regulates the following conditions :
Regulates level of water via water solenoid valve.

5
Fault Log
Press key to enter into Fault Log mode it will display last 10 faults.
Press key again to exit from fault log mode.
Press key to scroll through the all faults.
TEMP
Key Functions
Press key used to set value or to enter into set mode.
Press key used to enter into program mode
Press key used for 2 seconds to show fault log.
Press key for 4seconds to reset HP, LP, AFT faults in manual
reset.
Press key used for 2 seconds to start or stop the system.
Press key used to mute the buzzer.
Press key for 2 seconds to view AFT temperature.
START
STOP
MUTE
RST
TEMP
MUTE
RST
PRG
SET
MUTE
RST
6
PRG
SET
SET MODE
Sr.No.
Function : To set the cutout point of the
Controller.
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
value, press the SET key .
LtºC = Low temp Alarm.
HtºC = High temp. Alarm.
Parameter
(LCD Message)
Description of parameters and functions.
Parameter setting
method.
01
Press and hold set
key for 2 seconds and
release.
Range
Min Max Fact. Set
Lt +0.5ºC Ht -0.5ºC 10.0ºC
PROGRAM MODE
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
Parameter List
Min : MINIMUM Max : MAXIMUM
Fact. Set : FACTORY SETTING(DEFAULT)
04
Range
Min Max Fact. Set
Lt +0.5ºC Ht -0.5ºC 10.0ºC
CHILLER SET TEMP. Function : To set Chiller Set point.
parameter,press the set key.
To change Chiller Set Temp Use UP/DOWN keys to set desired value.
Lt = Low temp Alarm.
Ht = High temp. Alarm.
03
WORKING MODE Function : To set controller for heating or
cooling.
parameter, press the set key.
To change Working Mode
Range
Min Max Fact. Set
Cooling
mode
mode
Cooling Heating
mode
Heating Mode -If this is set then controller will
function in the heating mode i.e compressor
will be on if control temperature goes below
set point - differential .
Use UP/DOWN keys to set desired value.
Cooling Mode- If this is set then controller will
function in the cooling mode i.e compressor
will be on if control temperature goes above
set point + differential .
CHILLER SET TEMP.
26.0

Range
Min Max Fact. Set
Sr.No.
Parameter
(LCD Message)
Description of parameters and functions.
Parameter setting
method.
AFT PROBE STATUS
LOW TEMP ALARM
Use UP/DOWN keys to set desired value.
Disable = It disables the Antifreeze Trip
function of the controller.
Enable = It enables the Antifreeze Trip
function of the controller.
Use UP/DOWN keys to set desired
value.
SET = Chiller Set Temperature.
AFT = AFT Set Temperature.
EXAMPLE : Setting this parameter at
0
15.0 C will not allow the set point to go
0
below 15.0 C Also, if the temperature
0
reaches or goes below 15.0 C the
display will show Low Temp. Alarm and
at this point the alarm will activate.
To change AFT PROBE
STATUS parameter, press the
set key.
To change Low Temp Alarm
Parameter, press the set key.
10
09
Range
Range
Min
Min
Max
Max
Fact. Set
Fact. Set
Function: To enable or disable Antifreeze
function.
Function: To set minimum allowable low
temperature limit and alarm.
0 Min 20 Min 1 Min
Disable
+1.0ºC
AFT
Enable
SET-0.5ºC
Disable
6.0ºC
HT PWR ON DLY
08
Function: To set Power on delay for Ht
alarm.
To change Ht Pwr On Delay.
parameter,press the set key.
Example : If this parameter is set to 20
Min, once the unit is powered on the Ht
alarm will not activate for 20 minutes even
if there is a fault. This is very useful to
eliminate the nuisance alarm when a unit
is switched on.
Use UP/DOWN keys to set desired value.
This parameter sets a time delay on
power on for the Ht alarm.
8
7
Sr.No.
Parameter
(LCD Message)
Description of parameters and functions.
Parameter setting
method.
1.0ºC 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
0
EXAMPLE : If the set point is setat 10.0 C
0
and differential is setas 2.0 C, then when
0
th e sy s t e m re a ch e s 10 . 0 C, t h e
compressor will cutoff. Since differential
0
is 2.0 C, the compressor will cut in(restart)
0 0 0
at 12.0 C (10.0 C + 2.0 C).(Cooling Mode)
Use UP/DOWN keys to set desired value.
To change DIFFERENTIAL
parameter,press the set key.
06
Range
Min Max Fact. Set
DIFFERENTIAL Function: To set temperature differential
for compressor restart.
HIGH TEMP. ALARM
SET = Chiller Set Temperature.
Use UP/DOWN keys to set desired value.
Once set at a particular value, this will not
allow the set point to go above this value
and below Low Temp Alarm setting.
EXAMPLE : Setting this parameter at
0
25.0 C will not allow the set point to go
0
above 25.0 C. Also if the temperature
0
reaches or goes above 25.0 Cthe display
will show High Temp. Alarm & at this point
the alarm will activate.
To change HI Temp Alarm
parameter,press the set key.
07
Range
Min Max Fact. Set
Function: To set maximum allowable high
temperature limit and alarm.
SET
O
+0.5 C
70.0ºC 50.0ºC
05
COMP. TIME DELAY Function : To set compressor restart
delay.
Use UP/DOWN keys to set desired value.
parameter,press the set key.
To change Comp Time Delay

10
Sr.No.
Parameter
(LCD Message)
Description of parameters and functions.
Parameter setting
method.
1 SEC
1 SEC
120 SEC
90 SEC
10 SEC
5 SEC
WFS NORMAL DLY
WFS PWR ON DLY
Use UP/DOWN keys to set desired value.
If this parameter is set at 10 seconds, the
system will activate the flow switch alarm
only if the error persists for or more than
10 seconds. In this manner a false alarm
can be avoided during normal operation.
System will ignore WFS error for WFS
PWR ON DLY secs at system startup.
Use UP/DOWN keys to set desired value.
Parameter, press the set key.
To change WFS Normal Dly
To change WFS Pwr on Dly
parameter,Press the set key.
17
16
Function : To set WFS trip sensing
delay.
Function: To set WFS trip sensing delay
on power up.
Range
Range
Min
Min
Max
Max
Fact. Set
Fact. Set
Use UP/DOWN keys to set desired value.
230V = Controller will sense fault if i/p is
230V.
0V = Controller will sense fault if i/p is 0V.
To change Fault Sens Logic
parameter, press the set key.
Range
Min Max Fact. Set
0V 230 V 230V
FAULT SENS LOGIC
15
Function : To set tripping voltage of digital
inputs.
AFT PROBE CAL
same as above.
Use UP/DOWN keys to set desired value.To change AFT Probe Cal.
parameter, press the set key.
14
Function : To set Antifreeze probe
calibration.
Range
Min Max Fact. Set
-10.0ºC 10.0ºC 0.0ºC
9
Sr.No.
Parameter
(LCD Message)
Description of parameters and functions.
Parameter setting
method.
AFT SET TEMP
Use UP/DOWN keys to set desired value. To change AFT SET TEMP.
parameter, press the set key.
11
Function: To set Antifreeze tripping set
temp.
MAIN 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 value.
During the course of time there may be a
slight offset in the actual temperature and
the temperature displayed.
To change Main Probe Cal.
parameter, press the set key.
13
Range
Min Max Fact. Set
Function : To set Main(Liquid) probe
calibration.
Range
Min Max Fact. Set
-30.0ºC Lt-1.0ºC 5.0ºC
AFT DIFFERENTIAL
parameter, press the set key.
To change the AFT Differential
12
Function : To set fault resetting differential
for 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).
Note : If this fault selected to manual reset
press RST key for 4 seconds clear the fault.
1.0ºC 20.0ºC 2.0ºC
Range
Min Max Fact. Set
-10.0ºC 10.0ºC 0.0ºC
EXAMPLE : If this parameter is set to
5ºC controller will trip the compressor on
Antifreeze fault if the AFT sensor goes
below 5ºC.

11
DLY
LP SENSING
Use UP/DOWN keys to set desired value. To change LP Sensing Dly
parameter, press the set key.
18
Function: To set LP fault sensing delay
on compressor on.
Sr.No.
Parameter
(LCD Message)
Description of parameters and functions.
Parameter setting
method.
Manual Auto Auto
HP / AFT RESET
Use UP/DOWN keys to set desired value.
Auto = It sets the HP- AFT faults for
Manual = It sets the HP- AFT faults for
manual reset.
auto reset.
To change HP / AFT reset
Parameter, press the set key.
19
Function: This parameter will set HP and
AFT fault to Auto or Manual reset.
Range
Min Max Fact. Set
Manual Auto Auto
Range
Min Max Fact. Set
LP FAULT RESET
20
Function: This parameter will set LP fault
to Auto or Manual reset.
To change LP Fault Reset
Parameter, press the set key.
Manual = It sets the LP fault for manual
reset.
Use UP/DOWN keys to set desired value.
Auto = It sets the LP fault for auto reset.
1 SEC 90 SEC 30 SEC
Range
Min Max Fact. Set
EXAMPLE: If this parameter is set at 30
seconds, the system will ignore low
pressure alarm for 30 sec from
compressor on. In this manner, a false
alarm can be avoided due to low pressure
at compressor start up.
12
Sr.No.
Parameter
(LCD Message)
Description of parameters and functions.
Parameter setting
method.
Always On With Comp With Comp
PUMP RUN LOGIC
Use UP/DOWN keys to set desired value.
With Pump =In this case pump will switch
Always On = It sets the pump to always on
mode.
On and off with compressor.
Parameter, press the set key.
To change Pump Run Logic
24
Function : This parameter configures
pump to keep always ON or OFF with
compressor.
Range
Min Max Fact. Set
Disable = This parameter disables Liquid
level sensing in the controller.
level sensing in the controller.
Enable = This parameter enables Liquid
Range
Min Max Fact. Set
Disable Enable Disable
Parameter, press the set key.
To change Liq Level Sensor
LIQ LEVEL SENSOR
21
Function: This parameter enable/
disables liquid level sensing.
Use UP/DOWN keys to set desired value.
If set to
Use UP/DOWN keys to set desired value.
Disable = Controller will start in stand by
mode at power ON press start
power ON.
Enable = Will start the system when
Parameter, press the set key.
To change System Autostart
Range
Min Max Fact. Set
Disable Enable Enable
SYSTEM AUTOSTART
23
Function: This parameter configures
system to auto start or manual start on
power on.
If set to
ON HI LVL : This sets level fault on High
level.
level.
ON LO LVL : This sets level fault on low
Range
Min Max Fact. Set
ON LO
LVL LVL
ON HI ON LO
LVL
To change Liq Level Fault
Parameter, press the set key.
LIQ LEVEL FAULT
22
Function: This parameter is used to set
Liquid level fault on high level or low level.
Use UP/DOWN keys to set desired value.

14
Sr.No.
Parameter
(LCD Message)
Description of parameters and functions.
Parameter setting
method.
PUMP RUN HRS
31
Function: This parameter is used to
display pump working Hours.
COMP RUN HRS
30
Function: This parameter is used to
display compressor working hours.
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.
FACTORY SET
Use UP/DOWN keys to set desired value.
29
Function: Revert to factory set parameter.
To change Factory Set
parameter, press the set key.
KEYPAD LOCK
Use UP/DOWN keys to set desired value.
Enable = All parameters are locked to set
values.
Disable= User can change the values.
28
Function: To lock keypad.
Range
Min Max Fact. Set
parameter, press the set key.
To change Keypad Lock
Disable Enable Disable
Use UP/DOWN keys to set desired value.
Once the SET key is pressed the control goes
into the normal mode and displays the
temperature.
SET-EXIT
UP/DOWN SCROLL
To change Exit Program Mode
Parameter, press the set key.
32
Function: To end programming
13
Sr.No.
Parameter
(LCD Message)
Description of parameters and functions.
Parameter setting
method.
RELAY3 LOGIC
Use UP/DOWN keys to set desired value.
EXAMPLE: If set to water sv, Relay3 will
switch on incase of liquid level is below
mid level. If set to Alarm, Realy3 will
switch on for all faults.
26
Function : This parameter configures
Relay3.
Range
Min Max Fact. Set
To change Aux. Relay Logic
parameter, press the set key.
Alarm Water SV Alarm
Store Clear Store
CLEAR FAULT LOG
Use UP/DOWN keys to set desired value.
Store = Keep the fault log.
Clear = Keep the clear fault log.
To change Clear Fault Log
Parameter, press the set key.
27
Function: This parameter is used to clear
all fault history.
Range
Min Max Fact. Set
1 Sec 240 Sec 30 Sec
PUMP POWERON DLY
Example : if this delay is set to 20
seconds then at system start pump will
start after 20 sec and even if
compressor time delay is 3 mins. After
this it will always start with compressor.
Use UP/DOWN keys to set desired value.
To change the Pump Poweron Dly
parameter, press the set key.
25
Function : This parameter is used to set
delay for pump to start at power on. This is
applicable if the pump is running with
compressor.
Range
Min Max Fact. Set

Power input : 230Vac +/-20%,50-60Hz. Others on request.
O
Resolution : 0.5 C.
Connections : Screw terminal blocks.
O O
Operating temp. : 5 C to 50 C (non-condensing).
Dimensions : Front : 96x96 MM, Depth
: 84 MM
Housing : White or Black, ABS Plastic.
Display : 16x2 LCD, 3X14mm (0.36”) LED.
O O
Storage temp : -20 C to 70 C (non-condensing).
Input : NTC Probe, SZ-N75.
Mounting : Flush panel mounting with side clamps.
Panel Cutout : 91 X 91 MM
ALL Relay : 5A / 250VAC
< 2.5 sq mm one wire / terminal only.
O O
Range : -30 C to 70 C.
Data storage : Non-volatile EEPROM memory.
Digital Input : Potential (230Vac).
OO
Probe tolerance at 25 C : +/- 0.3 C
O
Accuracy : +/- 1 C.
TECHNICAL DATA
15
CONNECTION DIAGRAM
16
NEUTRAL
COND. O/L
CWFS
EWFS
SPP
PUMP O/L
COMP. O/L
LP
HP
13 14 15 16 17 18 19 20 21 22 23 24 26
12345678 9 1211
10
230V
AFT
PROBE
CONTROL
PROBE
HIGH
MEDIUM
LOW
NC
NO
C
NO
C
LIQUID LEVEL
SENSOR
ALARM / WATER SV
COMPRESSOR NC
NO
C
NEUTRAL PHASE
PUMP
ALARM /
WATER SV
MED
LOW
REF.
LIQ
LEVEL
SWITCH
13 14 15
OR
Housing : White or Black, ABS Plastic.
Mounting : Flush panel mounting with side clamps.
Dimensions : Front : 96x96 MM, Depth
: 84 MM
Panel Cutout : 91 X 91 MM
< 2.5 sq mm one wire / terminal only.
Display : 16x2 LCD, 3X14mm (0.36”) LED.
Data storage : Non-volatile EEPROM memory.
Power input : 230Vac +/-20%,50-60Hz. Others on request.
O O
Operating temp. : 5 C to 50 C (non-condensing).
O O
Storage temp : -20 C to 70 C (non-condensing).
Input : NTC Probe, SZ-N75.
Connections : Screw terminal blocks.
Digital Input : Potential (230Vac).
O O
Range : -30 C to 70 C.
O
Resolution : 0.5 C.
O
Accuracy : +/- 1 C.
OO
Probe tolerance at 25 C : +/- 0.3 C
ALL Relay : 5A / 250VAC

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.
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.
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
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
18
CLAMP
96.00 mm
Max 6.00mm
65 mm
10.00 mm

INDIA
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03 / 21.07.15
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.
19
Specifications are subject to change due to continuous improvements of our products. No
consequential damage or field labour is included in the sales of products mentioned in this
manual. The manufacturer is not liable for incorrect use/misuse of the product mentioned.
© PVR Controls. All rights reserved Sub-Zero and the Sub-Zero logo are registered trademarks of PVR Controls.
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 preparation 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.