Daikin UAA-ST3M Instruction Manual

INSTALLATION &
MAINTENANCE
MANUAL
AIR-COOLED CHILLER
(SINGLE SCREW COMPRESSOR)
UAA-ST3M
IM-UAA -0620(2)-DAIKIN
Part Number: C08019039757B

i | P a g e
⚠WARNING
Before starting the installation of the unit, please read this manual carefully. Starting up the unit is
absolutely forbidden if all instructions contained in this manual are not clear.
Key to symbols
Failure to comply with this instruction may damage the machine or affect its operation.
Note concerning safety in general or compliance with laws and regulations.
Note concerning electrical safety.
⚠WARNING
Electric shock hazard can cause personal injury or equipment damage. This equipment must be
properly grounded. Connection to, and service of, the MicroTech III control panel must be performed
only by personnel who are knowledgeable in the operation of this equipment.
⚠CAUTION
Static sensitive components. A static discharge while handling electronic circuit boards can cause
damage to the components. Discharge any static electrical charged by touching the bare metal inside
the control panel before performing any service work.
Never unplug any cables, circuit board terminal blocks, or power plugs while power is applied to the
panel.

ii | P a g e
TABLE OF CONTENTS GUIDELINE
TABLE OF CONTENTS GUIDELINE II
1INTRODUCTION 1
General 1
Application 1
Nomenclature 2
2ABOUT SAFETY 3
Transportation 3
Lifting 3
Installation 4
3MAJOR COMPONENTS LOCATION 6
4WORKING PRINCIPLE AND TECHNICAL DATA 8
Working principle 8
Operating range 9
Chiller Physical Data 10
5HANDLING 11
Transportation 11
Receiving the machine 11
Lifting 11
6INSTALLATION 15
Installation and Foundation 15
Chiller Outline Dimension and Load Distribution 18
Chiller Piping 23
Electrical Installation 27
7MAINTENANCE 57
Daily Maintenance 57
About Refrigerant 57
Cleaning and Maintenance 58
Long Idle Period Maintenance 59
8SERVICE PROCEDURE 1

1 | P a g e
1INTRODUCTION
General
IMPORTANT
•Maximum care should be taken to ensure correct installation and operation.
Correct maintenance of the unit is indispensable for its safety and
reliability. Contact Manufacturer's service team for maintenance.
Application
1.2.1 Purpose of the manual
The purpose of this manual is to allow the installer to carry out all required operations in order
to ensure proper installation of the machine, without causing any harm to people, animals and/or
objects.
All activities must be carried out in compliance with local laws and regulations.
1.2.2 Warning
This manual has been prepared as a technical support only. Daikin has prepared with the best of
their knowledge. No explicit or implicit warranty is provided about the completeness, accuracy
and reliability of its content. All data and specifications provided herein are subject to change
without prior notice from the manufacturer. Daikin specifically rejects any liability for any
direct or indirect damages, arose from or related to the use and/or interpretation of this manual.
All contents are Daikin copyright protected.
ATTENTION
This manual describes the features and procedures for UAA –cooling only series.
•All units are delivered with wiring diagram and Installation manual.
•WIRING DIAGRAMS AND DIMENSIONAL DRAWINGS MUST BE
CONSIDERED ESSENTIAL DOCUMENTS OF THIS MANUAL.
•If there are any incompatible between this manual and the two documents
mentioned above; please refer to the wiring diagram and dimensional
diagrams.

2 | P a g e
Nomenclature
UAA 105 ST 3 M –F BB
Efficiency Class
:
BB - High Efficiency
Power Supply
:
F - 380 ~ 400V / 50Hz
Manufactured Country
:
M - Malaysia
Refrigerant Type
:
3 - R134a
Model
:
ST - Standard
Cooling Capacity
:
105 - 450 USRT
Chiller Name
:
UAA - Air cooled screw chiller

3 | P a g e
2ABOUT SAFETY
Transportation
⚠WARNING
•Transportation must be carried out in compliance with local laws and regulations.
Lifting
⚠WARNING
•Lifting must be performed in accordance with the installation instructions in this
Manual. Manufacturer is not responsible for any equipment damage, personal
injury or death resulting from failing to comply with these requirements.
•The equipment must be lifted with the utmost attention and care. Avoid jolting
when lifting and lift the machine very slowly, keeping it perfectly level.
•It is prohibited to stay under the crane or equipment during lifting.
⚠CAUTION
•Lifting should be performed by experienced personnel who is familiar with the
provisions of law and local regulations, and who has been properly trained or has
experience with this type of equipment.
IMPORTANT
•It is advisable to add some insulation material between lifting ropes and machine
to avoid scratching the equipment.
⚠CAUTION
•The stability of the equipment during shipping must be ensured.
•Block equipment from sliding on lorries to prevent damage to the panels and base
frame. Avoid bumping, jolting and impacts during unloading and/or moving the
machine. Do not push or pull the equipment from any part other than the base frame.
Failure to follow above-mentioned instructions could cause serious damages for
which the manufacturer will not be held liable.

4 | P a g e
Installation
Unit installation
⚠WARNING
Installation should be performed by experienced personnel. Avoid installing the equipment in a place
that could be dangerous during maintenance operations, such as (but not limited to) platforms without
parapets or railings, or areas not complying with the clearance requirements.
⚠CAUTION
•Installation must be performed in accordance with the installation instructions in
this Manual.
•If the unit operates cooling mode when ambient temperature is lower than 5°C
and wind speed is more than 10 m/s, please consult manufacturer.
IMPORTANT
•Install a strainer on the inlet to each heat exchanger. Failure to install a strainer
allows solid particles and/or welding slags to enter the heat exchanger. Installation
of a strainer with mesh size recommended by manufacturer (refer to page 16). The
manufacturer will not hold responsible for any damage to heat exchanger due to
blockage.
•All other water piping outside the chiller must be protected against freezing.
•Adjust the anti-vibration mountings beneath the equipment before connecting
water pipe.

5 | P a g e
Electrical installation
⚠CAUTION
•All electrical connections to the machine must be carried out in compliance with
laws and regulations in force.
•All installation, operating and maintenance activities must be carried out by
qualified personnel.
•Please refer to the specific wiring diagram for the machine that you have
purchased, and which was sent with the unit.
•Should the wiring diagram not come with the machine, please contact your dealer
for further action.
•Use copper conductors only. Failure to use copper conductors could cause
overheating or corrosion at the connection points and damages the unit.
•To avoid interference, all control wires must be installed separately from the
power wires. Use separate electrical conduits for this purpose.
•Before servicing the machine in any way, open the general disconnecting switch
on the machine's main power supply.
•When the machine is off, but the disconnector switch is in the closed position,
unused circuits are live as well.
•Never open the terminal board box of the compressors before having opened the
unit's general disconnecting switch.
•In installations with power supply lines longer than 50 meters, inductive coupling
between phases and between phase and earth generates significant
electromagnetic field.
•In order to limit these phenomena, it is good practice to lay out the phase wires
symmetrically, as described in the figure:
•Chiller unit compressors are single-direction rotation compressors and can be damaged if
rotated in the wrong direction. For this reason, proper phasing of electrical power is
important. Terminal block indicator (R, S, T). R=L1, S=L2, T=L3

6 | P a g e
3MAJOR COMPONENTS LOCATION
1 System (UAA105- UAA220)
A
C
B
D
D
E
F
G
H
I
C
Figure 1 Chiller Front View
Figure 2 Chiller View (1 System)

7 | P a g e
Figure 3 Chiller View (2 System)
2 System (UAA 245- UAA450)
Item
Description
A
Fan Assembly
B
Coil Assembly
C
Compressor
D
Evaporator
E
Electronic Expansion Valve
F
Compressor Terminal Box
G
Filter Drier
H
Economizer
C
D
G
H
H
G
C
F
F

8 | P a g e
Figure 4 UAA Schematic Diagram
4WORKING PRINCIPLE AND TECHNICAL DATA
Working principle

9 | P a g e
Figure 5 Operating Envelope
The working principle of UAA chillers is showed as Figure 4:
1. The low-temperature and low-pressure refrigerant enters the compressor and
becomes a high-temperature and high-pressure gas after compressed, then enters the
condenser from compressor, and exchanges the heat with cooling air pass through
condenser coil.
2. The high-pressure liquid refrigerant after cooled by the condenser coil passes
through liquid line.
3. Some of the refrigerant is throttled by thermal expansion valve and flashed in
economizer and then enter the compressors. The other part of liquid refrigerant is
throttled by electronic expansion valve, and then enters the evaporator.
4. The refrigerant is evaporated in the evaporator and takes use of latent heat to make
the chilled water temperature decrease and thus achieve cooling.
5. The refrigerant gas enters the compressor and begins the next cycle.
6. UAA 2 system has the same working principle as UAA 1 system. The only
difference is the number of refrigerant circuits.
Operating range
Operation outside these limits can cause the protective devices to intervene and interrupt unit
operation. In extreme cases, damage to the equipment may occur. If in doubt, consult the
manufacturer.

10 | P a g e
Chiller Physical Data
UAA
105
125
150
175
204
220
245
291
348
380
400
450
Nominal cooling capacity
kW
370
449
586
663
717
802
898
1035
1172
1326
1434
1604
USRT
105
128
167
189
204
228
255
294
333
377
408
456
×104kcal/h
32
39
50
57
62
69
77
89
101
114
123
138
Total power input for cooling
kW
115.5
138.5
178.7
201.3
216.1
242.6
277.0
317.2
357.4
402.6
432.2
485.2
Power supply
380-400V/3N~/50Hz
Maximum running current
A
321
349
431
505
540
637
698
780
861
1011
1080
1275
Starting current
A
473
480
708
715
715
740
829
1057
1139
1221
1255
1377
Energy regulation range
10%~100%
5%~100%
Refrigerant
Type
R134a
No. of Sys.
1
2
Control
Electronic Expansion Valve
Compressor
Type
Semi-hermetic Single-screw
Qty. X Model
HSS
1x3221b
1×3222b
1x4224a
1x4225a
1x4226a
1x4227a
2x3222b
1x3222b
1x4224a
2×4224a
2×4225a
2×4226a
2x4227a
Cooling motor
power
kW
103.5
122.5
158.7
177.3
192.1
214.6
245.0
281.2
317.4
354.6
384.2
429.2
Oil type
FVC68D
Oil charge
L
22
22
28
28
28
28
44
50
56
56
56
56
Condenser
Type
Crossed Fin and Tube
Fan
Type
High-efficient Spiral Axial
Qty.
n
6
8
10
12
12
14
16
18
20
24
24
28
Total air flow
x104m3/h
10.8
14.4
18.0
21.6
21.6
25.2
28.8
32.4
36.0
43.2
43.2
50.4
Total power
kW
12.0
16.0
20.0
24.0
24.0
28.0
32.0
36.0
40.0
48.0
48.0
56.0
Evaporator
Type
Shell and Tube
Nominal water flow
m3/h
64
77
101
114
123
138
154
178
202
228
247
276
Water resistance
kPa
58
75
68
70
76
62
72
74
78
83
61
79
Maximum design
pressure (water side)
MPa
1.0
Victaulic connection
inch
4
5
6
8
Dimensions
Length
mm
3582
4482
5382
6282
6282
7182
8656
9556
10456
12259
12259
13159
Width
mm
2246
Height
mm
2367
2392
Weight
Shipping
kg
2880
3630
4560
4930
5050
5690
7220
8030
8820
9570
9800
11180
Operating
kg
2950
3740
4700
5100
5300
5940
7480
8340
9120
9950
10320
11690
Note:
•Nominal cooling capacity is based on the following conditions: 12/7°C EWT and LWT, 35°C
ambient temperature;
•Maximum running current refers to the maximum current when the unit is working in the
allowable area.
•Shipping quality include steel packing quality. Operating quality include the quality of water in
the water-side heat exchanger, without steel packing quality.

11 | P a g e
5HANDLING
Transportation
Block equipment from sliding on lorries to prevent damage to the panels and base frame. Avoid
bumping, jolting and impacts during unloading and/or moving the machine. Do not push or pull
the equipment from any part other than the base frame. Failure to follow above-mentioned
instructions could cause serious damages for which the manufacturer will not be held liable.
Receiving the machine
Themachinemustbeinspectedforanypossibledamageimmediatelyuponreachingitsfinalplace
of installation. All components described in the delivery note must be carefully inspected and
checked. Any damage must be reported to the carrier. Before connecting the machine to earth,
check that the model and power supply voltage shown on the nameplate are correct.
Responsibility for any damage after acceptance of the machine cannot be attributed to the
manufacturer.
To prevent the possibility of incomplete delivery (missing parts) or transport damage, please
perform the following checks upon receipt of the machine:
•Before accepting the machine, please verify every single component in the consignment.
Check for any damage.
•In the event of the machine has been damaged, do not remove the damaged material. A
set of photographs are helpful in ascertaining responsibility.
•Immediately report the extent of the damage to the transportation company and request
that they inspect the machine.
•Immediately report the extent of the damage to the retailer, so that arrangements can be
made for the required repairs. In no case must the damage be repaired before the
machine has been inspected by the representative of the transport company.
Lifting
Use proper lifting method:
•Please use spreader bar and the lifting holes of the machine when lifting to avoid damage
to the equipment. The hoisting belt (such as tight wire, nylon) should be doubled and
not shorter than ten meters (or four not shorter than five meters), and both sides of pole
should be extended over 100mm out of unit in order to prevent the hoisting belt from
damaging unit.
•The increase of length and weight of UAA245~450 units bring a lot of difficulties to
hoisting work. Use double lifting ropes and holes as that used for UAA105~220 units.
•It is necessary that the unit maintains at level when being hoisted. Tilt angle should be
less than 15 degrees; otherwise the unit may be overturned.

12 | P a g e
Figure 6 Unit hanging points
Hanging Point
•1 System (UAA105 –UAA220)
•2 System (UAA245 –UAA450)
UAA
A
B
C
D
E
F
G
H
I
105
817
1880
553
-
-
-
-
125
775
2820
553
-
-
-
-
150
990
3070
990
-
-
-
-
175
760
1300
1530
1300
1110
-
-
-
-
204
417
1650
1600
1650
683
-
-
-
-
220
758
2115
1200
2115
662
-
-
-
-
245
1000
2760
1260
2760
550
291
1000
3000
1800
2760
430
348
1000
2955
2670
2760
550
380
650
2050
790
2050
1260
2050
790
2050
240
400
650
2050
790
2050
1260
2050
790
2050
240
450
650
2180
1240
2180
1460
2180
1240
2180
410

13 | P a g e
•UAA 105 –UAA 150
•UAA175 –UAA220
•UAA204 - 220

14 | P a g e
Figure 7 Hanging Method
•UAA245 –UAA348
•UAA380 –UAA450

15 | P a g e
6INSTALLATION
Installation and Foundation
6.1.1 Selection of installation location
•The equipment is designed for outdoor installation, such as roof, ground or building
surroundings.
•The equipment should be positioned on robust and perfectly level foundation. It is
recommended that whole concrete board that extends to frozen ground be used as the
equipment foundation. While using the strip of concrete as the foundation, the minimum
width where install spring shock absorber must be no less than 250mm.
•The base must be strong enough to support the weight of the equipment as stated in the
technical specifications and service personnel.
•To minimize the vibration and noise transferred to building and surroundings, spring
shock absorbers (accessories sent together with equipment) must be installed.
Note: DAIKIN is not responsible for any equipment issue resulting from an Improper designed
or constructed foundation.
6.1.2 Space Requirement
•Air-cooled chiller requires sufficient heat exchange between the air heat exchanger and
outside air to operate efficiently. There should be enough clearance around the
equipment to let sufficient air flow into condenser coil and allow for all post-installation
and maintenance work to be carried out correctly. Provide the minimum clearance
around the equipment as shown in dimensional drawings.
•When air-cooled chiller is installed in area with snowfall (if applicable), please take note
on the following conditions:
(1) Do not install the chiller below the eaves.
Improper installation Proper installation
(2) Raise the installation foundation height of chiller in accordance with accumulated
snow depth. (The chiller foundation height should be 1m or more above the
maximum depth of accumulated snow.)

16 | P a g e
Improper installation Proper installation
A: Accumulated snow depth
Do not install the chiller in a place where snow can be accumulated.
Improper installation
6.1.3 Unit Clearance
•Clearance requirement for equipment maintenance:
A
A
A
A
A
A