Sub-Zero SZ-7556T Instruction Manual

SZ-7556/58/66/68T
Instruction Manual
Touch Sensitive Temperature Controller
Introduction
The Sub-Zero Series, SZ-7556/58/66/68T are aesthetically superior
versions of their predecessors.
The SZ-7556/58/66/68T are Two Relay Controller.
SZ-7566/68T are specifically designed for the Panel A/C,
Oil Cooler, Package A/C and similar kind of applications.
SZ-7558/68T has an inbuilt Power Relay. The Controllers have
special features like Power ON Time Delay for Alarm.
A number of parameters are displayed alphanumerically to set the
Controller for specific application. This Controller can be used for
several applications.
Temperature Range:
SZ-7556/58T
O O
For Display -45.0 C to 100 C
For Parameters (rS = 0.1): 0.0 O C to 50.0 O C
(rS = 1): 0 O C to 50 O C
SZ-7566/68T
O O
For Display -45.0 C to 100 C
For Parameters (rS = 0.1): -40.0 O C to 99.0 O C
(rS = 1): -40 O C to 99 O C
Cautions
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.
Notice: 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.
Installation: Fixing and dimensions of panel models:
To fix the unit, slide the fastener (1) through the guides (2) as per
the position shown in the figure. Move the fastener in the direction
of the arrow, pressing tab (3) it permits to move the fastener in the
opposite direction of the arrow.
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.
Panel Cutout & Dimensions
Suggested Wiring Diagram (for SZ-7556T / SZ-7566T)
Suggested Wiring Diagram (for SZ-7558T / SZ-7568T)
Technical Data
Housing : Black ABS Plastic, Auto-extinguish
Front Cover : Polycarbonate Plastic V0 Grade
Dimensions : Frontal: 78 X 36mm, Depth: 80mm
Panel Cutout : 29 X 71mm
Mounting : Flush panel mounting with fasteners
Protection : IP65 Front (with gasket)
Connections : Screw terminal blocks.
< 2.5sq mm terminal only.
Display : 3 X 17mm 7 segment display
5 LEDs for Indication
Data storage : Flash APROM Memory
Power input : 230 Vac ±10%, 50-60Hz Standard.
Others on request.
Relay output : Compressor Relay 20(8)A, 250V AC
(for SZ-7556/66T)
Compressor Relay 20(14)A, 250V AC
(for SZ-7558/68T)
Alarm Relay 5A, 250V AC
Operating temp. : 0°C to 60°C (non-condensing)
Operating humidity : 20% to 85% (non-condensing)
Storage temp : -25.0°C to 60.0°C (non-condensing)
Measuring Range : For SZ-7556/58T
0.0°C to 50.0°C (when rS=0.1)
0°C to 50°C (when rS=1)
For SZ-7566/68T
-40.0°C to 99.0°C (when rS=0.1)
-40°C to 99°C (when rS=1)
Input : NTC probe, SZ-T75
Digital Input (Potential Free) : Digital Input for
Compressor Fault
Resolution : +/- 1°C / 0.1°C (Selectable)
Accuracy : +/- 1°C
User Interface
Used in Program Mode to increment Parameter
Value.
Press and hold for 1 sec, Controller will enter into
UP KEY Log Mode.
Press and hold for 2 seconds, Controller will enter
the Program Mode.
Used in Program Mode to decrement Parameter
DOWN / Value.
PROGRAM
KEY
Press and hold for 2 Seconds, to reset any Manual
Faults present for Controller.
Press and hold for 500 m seconds, to mute the
RESET KEY Alarm Relay.
This key is used to exit from Program Mode, when
Display is showing Parameter Name.
Press and hold for 2 Seconds, Controller will enter
into Set Mode.
SET KEY In Program Mode/Set Mode: Set/Save the
changed value of Parameter.
Touch UP + RST keys Simultaneously to check
Control Probe Temperature when nd parameter set
to SP.
Index
Sr. Para Description
1 Compressor Relay Set Point.
2 To Set Other Parameter
3 Heating & Cooling Mode.
4 High Temperature Limit.
5 Low Temperature Limit.
6 Maximum Set Point Limit.
7 Minimum Set Point Limit.
8 Differential for Compressor Relay ON
condition.
9 Probe Calibration.
10 Time Delay (Compressor Relay restart after
cutoff).
11 Minimum ON time for Compressor relay.
12 Compressor Relay status in Probe Fail.
13 Compressor Relay OFF time during Probe
Fault.
14 Compressor Relay ON time during Probe
Fault.
15 To Activate or Deactivate AUX Digital Input
for Compressor Fault.
16 To set Fault Sensing Delay for AUX Digital
Input of Compressor Fault.
17 To set Compressor Status on AUX Digital
Input for Compressor Fault.
18 To set reset mode for Compressor Output on
AUX Digital Input for Compressor Fault.
19 Number of retrials of Compressor when
Manual Reset is selected.
20 Default (Normal) Display.
21 Delay the Display of Temperature.
22 To Activate Alarm.
23 Alarm Polarity.
24 This parameter is used to set the Time Delay
at Power ON for Alarm Indication.
25 To set Controller Resolution.
26 Change Password
27 Keypad Lock
28 Restore Factory Defaults.
29 End Programming.
LED Indications
Operating Messages
Password Function
Temperature Logging
Disclaimer & Warranty
Parameter List:
1. Function: To set Compressor Relay Set Point.
Touch & hold key for 2 seconds.
Display will show set value. The set point value can now be
modified by using the UP/DOWN key. After selecting the desired
value, touch the set key and user can see "- -" which confirms that
the set point has been stored in memory.
rS = 0.1 rS = 1
Min Max Fac. Set Min Max
LS+1.0 HS-1.0 1.0 O C LS+1 HS-1
2. To Set Touch & hold key for 2 seconds.
Other
Parameters
Display will flash "P1".
To select other parameters, use UP/DOWN keys.
3. Function: To set Controller for Heating or
Cooling.
To change value use To set value touch SET key.
keys.
(0) = Cooling mode
(1) = Heating mode.
Min
4. Function: To set Maximum Allowable High
Temperature Limit.
Example: If this parameter is set to 99.0
O
reaches or goes above 99.0 C, Display will show Ht (High
Temperature) indicating that the Temperature has reached or
gone above the value set in this parameter. Differential of 1.0°C is
considered for clearing the Fault.
SZ-7556/58T
rS = 0.1
Min Max Fac. Set
O O
P3+1.0 50.0 C 50.0 C
SZ-7566/68T
rS = 0.1
Min Max Fac. Set
O O
P3+1.0 99.0 C 99.0 C
5. Function: To set Minimum Allowable Low
Temperature Limit.
Example: If this parameter is set to -40.0
reaches or goes below -40.0 O C, Display will show Lt (Low
Temperature) indicating that the Temperature has reached or
gone below the value set in this parameter. Differential of 1.0°C is
considered for clearing the Fault.
SZ-7556/58T
rS = 0.1
Min Max Fac. Set
0.0 O C P2-1.0 0.0 O C
SZ-7566/68T
rS = 0.1
Min Max Fac. Set
O O
-40.0 C P2-1.0 -40.0 C -40
6. Function: To set Maximum Set Point Limit.
Once set at a particular value, this will not allow the Set Point to
go above this value.
Example: Setting this parameter at 25.0°C will not allow the Set
Point to go above 24.0°C (HS-1.0).
SZ-7556/58T
rS = 0.1
Min Max Fac. Set
SP+1.0 50.0 O C 50.0 O C
SZ-7566/68T
rS = 0.1
Min Max Fac. Set
SP+1.0 99.0 O C 99.0 O C
SP= Set Point
7. Function: To set Minimum Set Point Limit.
Once set at a particular value, this will not allow the Set Point to
go below this value.
Example: Setting this parameter at -10.0°C will not allow the Set
Point to go below -9.0°C (LS+1.0).
SZ-7556/58T
rS = 0.1
Min Max Fac. Set
0.0 O C SP-1.0 0.0 O C
SZ-7566/68T
rS = 0.1
Min Max Fac. Set
-40.0 O C SP-1.0 -40.0 O C -40
SP= Set Point
8. Function: To set the Differential for Compressor
Relay ON condition.
Example:
In Cooling Mode:
If The Set Point is Set at 10.0°C and Differential is set to 2.0°C,
When the System reached 10.0°C, Compressor Relay will go OFF.
Since the Differential is 2.0°C, Compressor Relay will Come ON
(Restart) at 12.0°C (10.0°C + 2.0°C).
In Heating Mode:
If The Set Point is Set at 10.0°C and Differential is set to 2.0° C,
When the System reached 10.0°C, Compressor Relay will go OFF.
Since the Differential is 2.0°C, Compressor Relay will Come ON
(Restart) at 8.0°C (10.0°C - 2.0°C).
rS = 0.1
Min Max Fac. Set
O O O
1.0 C 20.0 C 2.0 C
9. Function: To set Probe Calibration.
In time it may be possible that the display may be offset by a
degree or so.
To compensate for this error, user may need to add or minus the
degrees required to achieve the correct Temperature.
Example: The Temperature on the display is 28.0
T O
actual emperature is 30.0 C. User will have to set the P5
parameter to 2.0, which means that once out of the programming
mode, the Temperature on display will be 30.0
Fac. Set
rS = 0.1
1 O C
Min Max Fac. Set
O O O
-10.0 C 10.0 C 0.0 C -10
10. Function: To set Time Delay between
Compressor Relay restart.
This parameter is used to protect the Compressor from restarting
in a short period of time.
Example: If this parameter is set at 3 minutes, the Compressor
Relay goes OFF at the Set Point, it will not restart for a minimum
of 3 Minutes, even if the Differential is achieved earlier. This
parameter is good to protect the life of the Compressor.
Max Fac. Set
11. Function: Minimum ON Time for Compressor
Relay.
This parameter is used to protect the Compressor so that there is
enough time for oil to return back to the Compressor. This delay
O C and the Temperature
starts once the Compressor Relay is ON.
Example: If this parameter is set at 1 Minute and if the
Temperature is achieved before 1 Minute, then the Compressor
Relay will remain ON for minimum 1 Minute, though Set Point is
achieved.
SZ-7556/58T
rS = 1
Min Max Fac. Set
O O
P3+1 50 C 50 C
12. Function: Compressor relay status in case of
SZ-7566/68T
Probe Failure.
rS = 1
When set to
Min Max Fac. Set
(0) = Compressor relay status is OFF.
O O
P3+1 99 C 99 C
(1) = Compressor relay status is ON.
(2) = Compressor relay performs a duty cycle for Cn for
minutes OFF and Cy for minutes ON.
O C and the Temperature
13. Function: Compressor relay OFF Time during
Probe Fault.
(This parameter will be visible only when E1 is
SZ-7556/58T Example: If this parameter is set to 4 Minutes, then Compressor
Relay will be OFF for 4 Minutes while performing the duty cycle.
rS = 1
Min Max Fac. Set
0 O C P2-1 0 O C
SZ-7566/68T
14. Function: Compressor relay ON Time during
rS = 1
Probe Fault.
Min Max Fac. Set
(This parameter will be visible only when E1 is
O O
C P2-1 -40 C
Example: If this parameter is set to 10 Minutes, then Compressor
Relay will be ON for 10 Minutes while performing the duty cycle.
15. Function: To activate or deactivate Auxiliary
Digital Input for Compressor Fault.
When set to,
(0) = Auxiliary Digital Input for Compressor Fault
is disabled.
SZ-7556/58T
(1) = Auxiliary Digital Input for Compressor Fault
rS = 1
is activated when contact is Open.
Min Max Fac. Set
(2) = Auxiliary Digital Input for Compressor Fault
SP+1 50 O C 50 O C
is activated when contact is Closed.
SZ-7566/68T
rS = 1
Min Max Fac. Set
SP+1 99 O C 99 O C
16. Function: To set fault sensing delay for Auxiliary
Digital Input of Compressor Fault.
Example: If CF1=5 Seconds and if Auxiliary Digital Input for
Compressor Fault is present for 5 Seconds, then Fault is detected.
Note: This Parameter will be Visible only when CF0 parameter is
set to .
SZ-7556/58T
rS = 1
17. Function: To set Compressor Status on Fault of
Min Max Fac. Set
Digital Input.
0 O C SP-1 0 O C
When set to,
SZ-7566/68T
rS = 1 (0) = No action will be performed, Alarm will be OFF.
Min Max Fac. Set
(1) = No Action will be performed, Alarm will be ON.
O C SP-1 -40 O C
(2) = Compressor will be OFF.
Note: This Parameter will be Visible only when CF0 parameter is
set to .
18. Function: To set reset mode for Compressor
output, on AUX Digital Input for Compressor
Fault.
When set to,
(0) = Auto Reset.
(1) = Manual Reset after CF4 retrials in 1 hour.
Example: If this parameter set to "
then, AUX Digital Input fault for Compressor will be cleared after 5
rS = 1 retrials only after pressing reset key for 500milliseconds.
Min Max Fac. Set If this parameter is set to "
O O O be cleared automatically when it is healthy.
1 C 20 C 2 C
Note: This Parameter will be Visible only when CF0 parameter is
set to .
O
C, whereas the
19. Function: No of retrials of Compressor when
Manual reset is selected.
Example: As mentioned in CF3.
O O O
C (28.0 C+ 2.0 C).
Note: This Parameter will be Visible only when CF0 parameter is
set to .
rS = 1
Min Max Fac. Set
O O O
C 10 C 0 C
Min Max Fac. Set
0 Min 99 Min 3 Min
Min Max Fac. Set
0 Min 20 Min 0 Min
Min Max Fac. Set
).
Min Max Fac. Set
1 Min 99 Min 4 Min
).
Min Max Fac. Set
1 Min 99 Min 10 Min
Min Max Fac. Set
Min Max Fac. Set
0 sec 99 sec 5 sec
Min Max Fac. Set
" mode & CF4 is set to 5
" mode then Compressor fault will
Min Max Fac. Set
Min Max Fac. Set
1 10 5