Uniflair UST500 User manual

UNIFLAIR
Instruction manual
UST500 CONTROL BOARD
E
N

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UNIFLAIR SpA policy is one of continuous technological innovation.
The Company therefore reserves the right to amend any data herein
without prior notice.
D
isposal
:
the
product
is made up of metal parts and plastic parts.
In reference to European Union directive 2002/96/EC issued on 27
January 2003 and the related national legislation, please note that:
•
••
•WEEE cannot be disposed of as municipal waste and such waste
must be collected and disposed of separately;
•
••
•The public or private waste collection systems defined by local
legislation must be used. In addition, the equipment can be
returned to the distributor at the end of its working life when
buying new equipment.
•
••
•The equipment may contain hazardous substances: the improper
use or incorrect disposal of such may have negative effects on
human health and on the environment;
•
••
•The symbol (crossed-out wheeled bin) shown on the product or
on the packaging and on the instruction sheet indicates that the
equipment has been introduced onto the market after 13 August
2005 and that it must be disposed of separately;
•
••
•In the event of illegal disposal of electrical waste, the penalties are
specified by local disposal legislation.
D
rafted by:
C
hecked by:
A
pproved by:
Munari Andrea
14/04/2010
R
EAD AND SAVE
THESE INSTRUCTIONS

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CONTENTS
HOW TO USE THIS MANUAL.......................................................................................................................................................6 
INTRODUCTION............................................................................................................................................................................7 
General Description......................................................................................................................................................................................... 7 
Typical applications: ........................................................................................................................................................................................ 7 
Technical data:................................................................................................................................................................................................ 7 
Main functions: ................................................................................................................................................................................................7 
Models and Features.......................................................................................................................................................................................7 
USER INTERFACE (FOLDER PAR/UI).........................................................................................................................................8 
Keys................................................................................................................................................................................................................8 
Keys and associated functions......................................................................................................................................................................... 8 
Local On/OFF.................................................................................................................................................................................................. 9 
Keys – combined action................................................................................................................................................................................. 10 
Manual alarm acknowledgment and reset...................................................................................................................................................... 10 
LEDs and Display.......................................................................................................................................................................................... 11 
Display........................................................................................................................................................................................................... 11 
LED: decimal point......................................................................................................................................................................................... 11 
LED: States and Operating Modes................................................................................................................................................................. 12 
LED: Values and Units of Measure................................................................................................................................................................ 12 
LED: utilities................................................................................................................................................................................................... 12 
First switch on................................................................................................................................................................................................ 13 
Access to folders - menu structure................................................................................................................................................................. 13 
“Main Display” Menu...................................................................................................................................................................................... 15 
“Operating Mode” menu................................................................................................................................................................................. 16 
‘States’ menu................................................................................................................................................................................................. 17 
View Inputs/Outputs (Ai, di, AO, dO).............................................................................................................................................................. 17 
Setting the clock (CL)..................................................................................................................................................................................... 18 
Alarm Display (AL)......................................................................................................................................................................................... 20 
Example of how to set the setpoint (SP)........................................................................................................................................................ 20 
View and Reset compressor/pump time......................................................................................................................................................... 22 
Programming menu....................................................................................................................................................................................... 23 
Parameters (folder PAr)................................................................................................................................................................................. 23 
Functions (FnC folder)................................................................................................................................................................................... 24 
Entering a password (Par/PASS folder)......................................................................................................................................................... 24 
Alarm events (EU folder)................................................................................................................................................................................ 25 
SYSTEM CONFIGURATION (FOLDER PAR/CF) .......................................................................................................................28 
Configuration of analogue inputs.................................................................................................................................................................... 28 
Configuration of digital inputs......................................................................................................................................................................... 29 
Configuration of digital outputs....................................................................................................................................................................... 30 
Configuration of analogue outputs ................................................................................................................................................................. 31 
Serial configurations – Protocol parameters................................................................................................................................................... 33 
REMOTE TERMINAL...................................................................................................................................................................34 
OPERATING MODES – TEMPERATURE CONTROL (FOLDER PAR/TR)................................................................................35 
Proportional temperature control.................................................................................................................................................................... 35 
Temperature control differential..................................................................................................................................................................... 37 
Digital temperature control............................................................................................................................................................................. 37 
Block heat pump............................................................................................................................................................................................ 37 
Block heat pump based on external temperature and/or parameter............................................................................................................... 38 
Block heat pump from digital input................................................................................................................................................................. 38 
Economy function.......................................................................................................................................................................................... 38 
OPERATING STATES (FOLDER PAR/ST).................................................................................................................................39 
Operating modes........................................................................................................................................................................................... 39 
Operating modes........................................................................................................................................................................................... 39 
Automatic changeover................................................................................................................................................................................... 40 
COMPRESSORS (FOLDER PAR/CP).........................................................................................................................................41 
Type of compressors..................................................................................................................................................................................... 41 
Compressor timings....................................................................................................................................................................................... 41 
Minimum time between the switching on of more than one compressor (CP05)............................................................................................. 41 
For partialized compressors only - Minimum ON step during increase in output (CP08)................................................................................. 42 
Minimum time between the switching off of more than one compressor (CP06)............................................................................................. 42 
For partialized compressors only - Minimum ON step during decrease in output (CP09) ............................................................................... 43 
Minimum time between switching off and on of the same compressor (CP03)............................................................................................... 43 
Minimum time between the switching on of the same compressor (CP04)..................................................................................................... 43 
Minimum compressor ON time....................................................................................................................................................................... 43 
Compressor switch on/off sequence .............................................................................................................................................................. 44 

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INTERNAL CIRCUIT PUMP (FOLDER PAR/PI)..........................................................................................................................45 
Operating modes........................................................................................................................................................................................... 46 
Antifreeze operation with pump...................................................................................................................................................................... 47 
EXTERNAL EXCHANGER FAN (FOLDER PAR/FE)..................................................................................................................48 
Configuration of fan ....................................................................................................................................................................................... 48 
Fan control in defrost..................................................................................................................................................................................... 50 
INTERNAL EXCHANGER ELECTRIC HEATERS (FOLDER PAR/HI)........................................................................................52 
Internal exchanger heaters for antifreeze....................................................................................................................................................... 53 
Internal exchanger heaters in integrated use................................................................................................................................................. 53 
EXTERNAL EXCHANGER ELECTRIC HEATER PARAMETERS (FOLDER PAR/HE) .............................................................55 
AUXILIARY ELECTRIC HEATERS (FOLDER PAR/HA).............................................................................................................56 
DEFROST (FOLDER PAR/DF)....................................................................................................................................................57 
Start defrost................................................................................................................................................................................................... 58 
End defrost.................................................................................................................................................................................................... 59 
Defrost when compressor stops..................................................................................................................................................................... 59 
Manual defrost............................................................................................................................................................................................... 59 
Power failure during defrost........................................................................................................................................................................... 59 
ADAPTIVE (FOLDER PAR/AD)...................................................................................................................................................60 
Operating modes........................................................................................................................................................................................... 60 
Adaptive function with setpoint modification................................................................................................................................................... 60 
Adaptive function with hysteresis modification ............................................................................................................................................... 61 
Adaptive function with setpoint and hysteresis modification ........................................................................................................................... 61 
Setpoint regression........................................................................................................................................................................................ 62 
Protection...................................................................................................................................................................................................... 62 
ANTIFREEZE PARAMETERS WITH HEAT PUMP (FOLDER PAR/AF).....................................................................................63 
POWER LIMITATION (FOLDER PAR/PL)...................................................................................................................................64 
Operating modes........................................................................................................................................................................................... 64 
Power limitation – by high pressure probe (Cool and Heat)............................................................................................................................ 64 
Power limitation – by low pressure probe (Cool and Heat)............................................................................................................................. 65 
Power limitation – by temperature control probe (Cool and Heat)................................................................................................................... 65 
Power limitation – by external temperature (Cool and Heat)........................................................................................................................... 65 
ALARMS AND DIAGNOSTICS (FOLDER PAR/AL) ...................................................................................................................66 
Digital alarms................................................................................................................................................................................................. 67 
Analogue alarms............................................................................................................................................................................................ 68 
Table of Alarms ............................................................................................................................................................................................. 68 
PARAMETERS (PAR)..................................................................................................................................................................73 
Visibility and value of Parameters.................................................................................................................................................................. 73 
CONFIGURATION PARAMETERS (CF).....................................................................................................................................74 
User interface parameters (UI)....................................................................................................................................................................... 77 
Temperature control parameters (tr) – temperature controller........................................................................................................................ 78 
Function mode selection parameters (St)....................................................................................................................................................... 79 
Compressor Parameters (CP)........................................................................................................................................................................ 79 
Internal circuit pump parameters (PI)............................................................................................................................................................. 80 
Recirculation fan parameters (FI)................................................................................................................................................................... 81 
Secondary (external) exchanger fan parameters (FE).................................................................................................................................... 81 
Electric heater parameters (HI)...................................................................................................................................................................... 83 
External exchanger electric heater parameters (HE)...................................................................................................................................... 83 
Auxiliary electric heater parameters (HA)....................................................................................................................................................... 84 
External circuit pump parameters (PE)........................................................................................................................................................... 84 
Boiler parameters (br) -boiler......................................................................................................................................................................... 84 
Defrost parameters (dF)................................................................................................................................................................................. 84 
Dynamic setpoint parameters (dS)................................................................................................................................................................. 85 
Adaptive parameters (Ad).............................................................................................................................................................................. 85 
Antifreeze parameters with heat pump (AF)................................................................................................................................................... 86 
Power limitation parameters (PL)................................................................................................................................................................... 86 
Alarm parameters (AL)................................................................................................................................................................................... 86 
FUNCTIONS (FOLDER FNC) ......................................................................................................................................................88 
Manual defrost activation (folder FnC/dEF).................................................................................................................................................... 89 
Alarm acknowledgment (folder FnC/tA).......................................................................................................................................................... 89 
Change On/OFF state (folder FnC/St)............................................................................................................................................................ 89 
Multi Function Key......................................................................................................................................................................................... 90 
Using the Multi Function Key (folder FnC/CC)................................................................................................................................................ 90 
Download from reset...................................................................................................................................................................................... 91 

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Reset alarm log (folder EUr) .......................................................................................................................................................................... 92 
MECHANICAL ASSEMBLY.........................................................................................................................................................93 
TECHNICAL DATA......................................................................................................................................................................94 
I/O features.................................................................................................................................................................................................... 94 
Mechanical specifications.............................................................................................................................................................................. 95 
Display and LEDS.......................................................................................................................................................................................... 95 
Serials ........................................................................................................................................................................................................... 95 
Transformer................................................................................................................................................................................................... 95 
Mechanical dimensions.................................................................................................................................................................................. 95 
DEVICE OPERATION..................................................................................................................................................................96 
Permitted use ................................................................................................................................................................................................ 96 
Unintended Use............................................................................................................................................................................................. 96 
REGULATIONS............................................................................................................................................................................96 
RESPONSIBILITY AND RESIDUAL RISKS................................................................................................................................96 
NON-LIABILITY CLAUSE............................................................................................................................................................96 

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How to use this manual
This manual is designed to permit quick, easy reference with the following features:
References column:
A column to the left of the text contains references to subjects discussed in the text to help you locate the information you
need quickly and easily.
Cross references:
All words written in italics are referenced in the subject index to help you find the page containing details on this subject;
supposing you read the following text:
” If there are 2 compressors in the installation, the minimum time between the switching on and the switching off) of the two
compressors is observed. ”
The italics mean that you will find a reference to the page on the topic of compressors listed under the item compressors in
the index.
If you are consulting the manual “on-line” (using a computer), words which appear in italics are hyperlinks: just click on a
word in italics with the mouse to go directly to the part of the manual that discusses this topic.
Some segments of text are marked by icons appearing in the references column with the meanings specified below:
Warning! : information which is essential for preventing negative consequences for the system or a hazard to personnel,
instruments, data, etc., and which users MUST read with care.
Take note: information on the topic under discussion which the user ought to keep in mind
Tip: a recommendation which may help the user to understand and make use of the information supplied on the topic under
discussion.
References
Cross references
I
cons for
emphasis

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Introduction
General Description
Uniflair SpA, a leading manufacturer for over a decade of control equipment for small and medium-size air conditioning units is proud to present
UST500, the new range of compact devices with advance functions and groundbreaking applications.
Single-circuit control of centralized air-conditioning systems with 1 or 2 compressors (steps) such as:
•Chillers, Heat Pumps, Close Control:
owater-air;
oair-water;
owater-water;
oair-air;
•Motorized condensers
oair-cooled;
owater-cooled.
Typical applications:
•Minimarkets,
•Industrial plants,
•Offices,
•Hotels,
•Residential buildings.
Technical data:
There are 6 models in the UST 500 range providing up to 5 relay outputs, one TRIAC output, 2
PWM analogue outputs, a 0…10V/4…20mA configurable analogue output and an Open Collector digital output for an external relay. All inputs
and outputs are independent and configurable, meaning they can be adapted to fit any system.
Uniflair SpA's standard 32x74mm format also ensures the utmost flexibility and ease of installation.
Main functions:
•Temperature control via the input or output probe;
•Integrated boiler or heating control;
•Integrated control of two electric heaters or heating system;
•Dynamic set point;
•Automatic changeover;
•Indoor ventilation control;
•Dynamic defrosting;
•Full diagnostics;
•Modulating water pump control;
•Adaptive” function for units with no accumulation;
•Antifreeze function with water pump on external probe;
•Control of non-uniform tandem compressors;
•Power limitation;
•Resources optimized in accordance with the external temperature.
Models and Features
-->See Annexe A - Models and Accessories and the Specifications chapter

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User Interface (folder PAr/UI)
The front panel of the device functions as the user interface and is used to perform all operations relating to the device.
Keys
There are 4 keys on the front panel. Each key has (see the two tables below):
oA “direct” action (indicated on the key)
oAn “associated” function (indicated on the front panel of the device beside the key). In the manual, this is shown in square brackets
(e.g. [UP])
oA “combined” action involving two keys. In the manual, this is shown in square brackets (e.g.[UP+DOWN])
Keys and associated functions
Key Description
Key Press once (press and release)
K
ey
[associated
f
unction]
P
ress and hold
[press for about 3
s
econds]
Menu / Comments
UP
(UP)
•Increases a value
•Goes to the next
label
[Manual defrost
activation] Functions menu see
Functions chapter
(folder FnC)
DOWN
(DOWN)
•Decreases a value
•Goes to the previous
label
[Local ON/OFF]
See
L
ocal On/OFF
section
----
See also Functions
menu
Functions chapter
(folder FnC)
Esc(ape)
Output
(Without saving new
settings)
•Exit without saving
new settings
•Go back to previous
level mode [Change mode]
---
See section on
Changing operating
mode
Operating mode
menu
Set
Confirm
(save new settings)
•Confirms value / exit
and save new
settings
•Move to next level
(open folder,
subfolder, parameter,
value)
•Open State Menu
disp [Main display]
---
See Main Display
section [Main Display Menu]
ALL Alarm acknowledgment See
M
anual alarm
acknowledgment
and reset section
By parameter (see parameters chapter, parameters
U
I10-11-12-13-
14) the function [associated] can be enabled or disabled:
•0 = Key not enabled for the function
•1 = Key enabled for the function
<IMG INF O>
226, 75
117, 6
0
2
99,25
0
-1

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Local On/OFF
Device ‘On’ --> ‘OFF’
Press the [DOWN] key for about 3 seconds from
the main display
The word OFF will appear on the display.
All other LEDs will be off
Device ‘OFF’ --> ‘On’
The word OFF will appear on the display.
Press the [DOWN] key for about 3 seconds
UST500 will return to the “normal” screen
NOTE:
The local ON/OFF function is deactivated if the device has been turned OFF remotely or if a digital input is
configured as a remote ON/OFF.
<IMG INF O>
226, 65
<IMG INF O>
226, 65

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Keys – combined action
S
ymbol
[function
associated to
the combined
pressing of
t
h
e
keys
]
Combination
Keys
C
ombined
pressing
of keys Press
once
(press and
r
elease
[associated function] [Menu] / Comments
[UP
(UP)
+
DOWN
(DOWN)]
[Manual reset]
See Manual alarm
acknowledgment and
reset section
[Esc
+
SETPOINT]
[Open programming
menu]
[Programming menu]
Manual alarm acknowledgment and reset
Alarm messages blink. How to acknowledge an alarm is explained below.
All error messages are shown in the AL folder (see state Menu)
set
esc
set
esc
An error message will be shown, alternating
with the error alert and the main display.
The ALARM LED will be permanently on.