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www.pvrcontrols.com
Instruction for SZ-7552-P
General Description
SZ-7552 is two compressor controller with separate
setpoints, differentials and time delays for each
compressor.
They are specifically designed for air conditioning
applications wherein the compressor cuts off at setpoint
and is restarted at a temperature of setpoint plus
differential.
The controller features cycling of compressors so that
there is no overload on one compressor.
Amongst others features, an
Incase one compressor is not capable of handling the
load, the second compressor will activate and both
compressors will cutout at the lowest set point.
1
Set Point
Function : To set the cutout point
of the controller.
Press & hold
Display will change to set point 1
SET key for 2
and flash
Seconds.
R1 will flash along with respective
rS = Resolution
setpoint1 for compressor 1.
Set Parameter
The setpoint1 value can now be
rS = 0
changed by using the UP/DOWN
Set Point 1 & 2
keys. After achieving the desired
Min
Max Fac
value, press the set key and
you will see "- - -" which confirms
P3
P2
O
1.0 C
that the set point has been stored
O
O
+1.0 C
-1.0 C
in memory.
rS = 1
R2 will flash along with
Set Point 1 & 2
respective set point 2 for
Min
Max Fac
compressor 2. In the similar
O
O
O
P3+1 C
P2-1 C
1 C
manner use UP/DOWN key to
set the desired value and press
set key to confirm the settings.
3
important one is that
OPERATING
INSTRUCTIONS
SZ-7552-P
INDEX
Parameter Page
Description
Set Point1 and set point 2.
3
To Set other parameters.
4
P1
5
Controller for heating or cooling.
P2
6
Max. High Temp Limit.
P3
7
Min. Low Temp. Limit.
P4
8
Differential.
P5
9
Probe Calibration.
10
P6
Time Delay.
11
To Start 2nd Comp. incase 1st Comp.
t2
t3
12
Min. Off time between two Comp.
t4
13
Avoid over loading of Comp.
LP
14
Keypad Lock.
E1
15
Relay status on Probe Failure.
rS
16
To set controller Resolution.
FS
17
Factory set parameter.
EP
18
End Programming.
19
Operating messages.
20
21
22-23
Panel cutout & Dimensions.
2
Parameter
Setting
Press and hold
Display will show 'P2' and flash.
PRG(prg) key
To go to other parameters. Use
for 2 seconds.
UP / DOWN keys.
prg
4
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Related Manuals for Sub-Zero SZ-7552-P
Summary of Contents for Sub-Zero SZ-7552-P
- Page 1 INSTRUCTIONS INDIA www.pvrcontrols.com SZ-7552-P INDEX Parameter Page Description Instruction for SZ-7552-P Set Point1 and set point 2. General Description To Set other parameters. Controller for heating or cooling. SZ-7552 is two compressor controller with separate Max. High Temp Limit. setpoints, differentials and time delays for each Min.
- Page 2 P1 Parameter Function: To set controller for heating Function : To set maximum or cooling. Parameter allowable high temperature limit. To change Use UP/DOWN keys to get To change Use UP/DOWN key to set the P1 desired value & press set P2 parameter, desired value.
- Page 3 Function : To start second comp. incase Function : To set minimum off Parameter Parameter comp 1 cannot achieve the lower set time between two compressor. point. To change This mode is used to set the time To change This function is used to switch on t3 parameter, delay between the switching off t2 parameter,...
- Page 4 Function : To set Programming. Function : To restore the default Parameter Parameter settings of the controller. To change When set to 1 all parameters are To end the Once the set key is pressed, the FS parameter programming programmed to factory values. controller goes into the normal press the press the...
- Page 5 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. SZ-7552-P Disclaimer : This manual & its contents remain the sole property of CAUTION...
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