Daikin FXZQ-MVE Reference manual

technical data
Systems
Introduction

• Systems • Introduction
1
• Introduction
IIntroduction
Table of contents
1Possible indoor units using R-410A..........................................................................2
2Possible outdoor units using R-410A......................................................................3
Indoor unit capacity index.............................................................................................................................3
3Nomenclature
Indoor units.............................................................................................................................................................4
Outdoor units ........................................................................................................................................................5
4 line-up..........................................................................................................6
5 technology ...............................................................................................7
6Main features
Creating maximum comfort......................................................................................................................10
Energy efficient solution..............................................................................................................................13
High reliability .....................................................................................................................................................16
Eco friendly...........................................................................................................................................................18
Easy and flexible design................................................................................................................................19
Simple and rapid installation.....................................................................................................................22
7Selection procedure
Selection procedure System based on cooling load..................................................................26
Capacity correction ratio .............................................................................................................................29
Refnet pipe system..........................................................................................................................................37
Refnet pipe selection .....................................................................................................................................39

• Introduction
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1
• Systems • Introduction
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1Possible indoor units using R-410A
Description Indoor unit Size
20 25 32 40 50 63 80 100 125 200 250
4-way blow ceiling mounted cassette (600 mm x 600 mm) FXZQ-MVE xxxxx
4-way blow ceiling mounted cassette FXFQ-M7V1B xxxxxxxxx
2-way blow ceiling mounted cassette FXCQ-M7V1B xxxxxxx x
Ceiling mounted corner cassette FXKQ-MVE x x x x
Concealed ceiling unit FXSQ-M7V1B xxxxxxxxx
Concealed ceiling unit (large) FXMQ-MVE xxxxxxxx
Concealed ceiling unit (small) FXDQ-M7V1B x x
Wall mounted unit FXAQ-MVE xxxxxx
Ceiling suspended unit FXHQ-MVE x x x
Floor standing unit FXLQ-MVE xxxxxx
Concealed floor standing unit FXNQ-MVE xxxxxx

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• Systems • Introduction
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• Introduction
2Possible outdoor units using R-410A
2-1 Indoor unit capacity index
NOTE
1e.g. Selected indoor units: FXCQ25 + FXFQ100 + FXMQ200 + FXSQ40
Connection ratio: 25 + 100 + 200 + 40 = 365
→ Possible outdoor unit: RXYQ12M
VRV II heat pump Fixed combinations Nr. of outdoors Nr. of compressors Nr. of connectable indoor units Minimum capacity index Maximum capacity index
RXYQ5M RXYQ5M 1 1 8 63 163
RXYQ8M RXYQ8M 1 2 13 100 260
RXYQ10M RXYQ10M 1 2 16 125 325
RXYQ12M RXYQ12M 1 2 20 150 390
RXYQ14M RXYQ14M 1 3 20 175 455
RXYQ16M RXYQ16M 1 3 20 200 520
RXYQ18M RXYQ8M + RXYQ10M 2 4 20 225 585
RXYQ20M RXYQ10M x 2 2 4 20 250 650
RXYQ22M RXYQ10M + RXYQ12M 2 4 22 275 715
RXYQ24M RXYQ10M + RXYQ14M 2 5 32 300 780
RXYQ26M RXYQ10M + RXYQ16M 2 5 32 325 845
RXYQ28M RXYQ12M + RXYQ16M 2 5 32 350 910
RXYQ30M RXYQ14M + RXYQ16M 2 6 32 375 975
RXYQ32M RXYQ16M x 2 2 6 32 400 1,040
RXYQ34M RXYQ10M x 2 + RXYQ14M 3 7 34 425 1,105
RXYQ36M RXYQ10M x 2 + RXYQ16M 3 7 36 450 1,170
RXYQ38M RXYQ10M + RXYQ12M + RXYQ16M 3 7 38 475 1,235
RXYQ40M RXYQ10M + RXYQ14M + RXYQ16M 3 8 40 500 1,300
RXYQ42M RXYQ10M + RXYQ16M x 2 3 8 40 525 1,365
RXYQ44M RXYQ12M + RXYQ16M x 2 3 8 40 550 1,430
RXYQ46M RXYQ14M + RXYQ16M x 2 3 9 40 575 1,495
RXYQ48M RXYQ16M x 3 3 9 40 600 1,560
Model 20 25 32 40 50 63 80 100 125 200 250
Capacity index 20 25 31.25 40 50 62.5 80 100 125 200 250

• Introduction
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• Systems • Introduction
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3Nomenclature
3-1 Indoor units
V1M40S Q BFX
Power supply symbol
V1: 1~, 230V, 50Hz
VE: 1~, 220-240V, 50Hz
Special series for Europe (CE approved)*
M: Indicates major design category
M7: Indicates DENV production
Capacity Indication
Conversion to horsepower:
Indicates use with ozone friendly refrigerant R-410A
20: 0.8HP
25: 1HP
32: 1.25HP
40: 1.6HP
50: 2.0HP
63: 2.5HP
80: 3.2HP
100: 4HP
125: 5HP
200: 8HP
250: 10HP
Model name
Z: 4-way blow ceiling mounted cassette (600x600mm)
F: 4-way blow ceiling mounted cassette
C: 2-way blow ceiling mounted cassette
K: Ceiling mounted corner cassette
S: Concealed ceiling unit
D: Concealed ceiling unit (small)
M: Concealed ceiling unit (large)
H: Ceiling suspended unit
A: Wall mounted unit
L: Floor standing unit
LM: Concealed floor standing unit
Indicates that this is an INVERTER HEAT PUMP/COOLING ONLY
or a HEAT RECOVERY indoor unit
* B is not mandatory for indoor units

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3
• Systems • Introduction
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• Introduction
3Nomenclature
3-2 Outdoor units
•VRVII heat pump
RX Y Q 8 M7 W1 B
Special series for Europe (CE approved)
Power supply symbol:
W1: 3N~, 400V, 50Hz
M7, M: indicates major design category (internal company symbol)
5: 5HP 12:12HP
8: 8HP 14:14HP
10: 10HP 16:16HP
Indicates the use of ozone friendly refrigerant R-410A
Indicates heat pump (year around)
RX: indicates that this is an INVERTER outdoor unit

• Introduction
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• Systems • Introduction
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4 line-up
5HP 22-24-26HP
28-30-32HP
34-36HP
38-40-42HP
44-46-48HP
8-10HP
12-14-16HP
18-20HP

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• Systems • Introduction
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• Introduction
5 technology
 Reluctance brushless DC Compressor
The reluctance brushless DC motor provides significant increases in efficiency compared to conventional AC inverter motors, simultaneously using
2 different forms of torque (normal and reluctance torque) to produce extra power from small electric currents.
The motor comprises powerful neodymium magnets, that create the reluctance torque. These magnets ar approximately 12 times stronger than ferrite
magnets and make a major contribution to its energy saving characteristics.
Secret to raising energy-efficiency! Powerful neodymium magnets
 Sine Wave DC inverter
Optimizing the sine wave curve, results in smoother motor rotation and improved motor efficiency.






First in the
industry
N
S
N
NN
N
S
S
S
S
Rotating
Stator
Field
Iron
Neodymium magnet
"Normal" torque
Reluctance torque
Low pressure side
Suction
Scroll
Discharge
Reluctance
DC Motor
High pressure side
Ferrite magnet
Neodymium magnet
Neodymium magnet is
12 times more powerful
than the widely used
ferrite magnets

• Introduction
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• Systems • Introduction
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5 technology
 DC fan motor
The use of a DC fan motor offers substantial improvements in operating efficiency compared to conventional AC motors, especially during low speed
rotation.
 Aero fitting grill & aero spiral fan
These new features achieve a low noise fan with a large airflow, and realize a compact casing together with the compressor linking technology.
 e-Bridge circuit
Prevents accumulation of liquid refrigerant in the condenser. This results in more efficient use of the condenser surface under any circumstance and
leads in turn to better energy efficiency.
An increase in evaporative capacity systems from the newly developed refrigeration circuit, known as the SCe-bridge circuit, which adds super cooling
prior to the expansion cycle. By adopting this circuit, the COPs in both cooling and heating have been drastically improved.
First in the
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DC motor
DC motor efficiency
(comparison with a conventional AC motor)
AC motor
Efficiency (%)
100
80
60
40
20
0200 300 400 500 600 700 800 900 1000
Motor speed (rpm)
DC fan motor structure
magnet
NEW
Aero spiral fan
Bending the fan blade
edge reduces turbulence,
resulting in less pressure
loss.
Aero fitting grille
New shape promotes a
spiral discharge airflow,
resulting in reduced
pressure loss.
First in the
industry
Evaporative capacity can be
raised by taking super cooling
just before the electronic
expansion valve
By the SCe- bridge circuit,
cooling and heating attain the
improvement in COP
Evaporative-capacity has been improved by adopting the SCe-Bridge Circuit.
SCe-Bridge Circuit
Current
Evaporative-capacity

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• Systems • Introduction
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• Introduction
5 technology
 e-Pass heat exchanger
Optimization of the path layout of the heat exchanger prevents heat transferring from the overheated gas section towards the sub cooled liquid section
- a more efficient use of the heat exchanger.
 i-Demand function
The newly introduced current sensor minimizes the difference between the actual power consumption and the predefined power consumption.
 Compact aero box
Lower noise and savings in input power are achieved by stacking the inverter and control PCBs within a new and more compact ‘aero’ box.
First in the
industry
in 85°C
out 45°C
Current Model
In cooling mode, the heat exchanger of the condensor is improved. This means an improvement of COP by 3%.
HD Type
27°C55°C
55°C37°C
55°C
50°C
27°C
27°C
in 85°C
out 45°C
27°C43°C
60°C
55°C
27°C
27°C
8:00
Power
consumption (KVV)
Time
12:00 16:00 20:00
NEW

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• Systems • Introduction
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6Main features
6-1 Creating maximum comfort
6-1-1 Inverter technology
The linear VRV system makes use of a variable Proportional Integral (PI) control system which uses refrigerant pressure sensors to give added control
over inverter and ON/OFF control compressors in order to abbreviate control steps into smaller units to provide precise control in both small and larger
areas.
This in turn enables individual control of up to 40 indoor units of different capacity and type at a ratio of 50~130 % in comparison with outdoor units
capacity. 5 HP outdoor units use inverter control compressors only.
5HP Outdoor Unit
Large Load Small
100%
24%
Inverter
Control
210Hz~52Hz
20 Steps
Compressor Capacity Control
14,16HP Outdoor Unit
Large Load Small
100%
10%
Nr. 1
Compressor
Inverter Control
Nr. 1
Compressor
Inverter Control
Nr. 1
Compressor
Inverter Control
Inverter Control
210Hz~52Hz 20 steps
Nr. 3
Compressor
100% Operation
Nr. 2
Compressor
100% Operation
Nr. 2
Compressor
100% Operation
210Hz~52Hz
+ Nr. 2 + Nr. 3
Compressor
35 Steps
Compressor Capacity Control
8,10,12HP Outdoor Unit
Large Load Small
100%
14%
Nr. 1
Compressor
Inverter Control
Nr. 1
Compressor
Inverter Control
Nr. 2
Compressor
100% Operation
210Hz~52Hz
+ Nr. 2 Compressor
29 Steps
Compressor Capacity Control

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• Systems • Introduction
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• Introduction
6Main features
6-1 Creating maximum comfort
6-1-2 Smart control brings comfort
An electronic expansion valve, using PID control, continuously adjusts the refrigerant volume in respond to load variations of the indoor units. The VRV
system thus maintains comfortable room temperatures at a virtually constant level, without the temperature variations typical of conventional ON/OFF
control systems.
The thermostat can control stable room temperature at ± 0.5°C from set point.
6-1-3 Less frequent start/stop cycle
•The technique adopted by Daikin, of regulating the capacity using multiple compressors clearly results in minimum switching losses and power surges
because of the overlap in capacity and frequency
•Since Daikin utilises small 5HP inverter compressors, the influence of harmonics is less than that generated by a single large compressor
•The use of multiple compressors by Daikin also ensures a 50 % standby facility
•Smaller compressors are cheaper and faster to replace
Cooling
NOTE
1the graph shows the data, measured in a test room assuming actual heating load.
Repeatshotandcoldcycles
Startup time educedby about 1/3
Large temperature difference
Inverter AC
Non inverter AC
Set point
Slow start-up
Keeps temperature stable
Smaller
temperature
difference
VRV series (Daikin PID controls)
On/off controlled air conditioner (2.5HP)
Time
Suction air temp.
Frequency
30 116 30+on 116+on
Capacity
50%
60%
55%
65%

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• Systems • Introduction
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6Main features
6-1 Creating maximum comfort
6-1-4 PID control
Proportional Integral Derivative control with an automatic capacity balancing circuit:
– enables the use of lengthy piping up to 100 meters (actual length)
– consists of two control systems:
1Oil control system that controls the refrigerant oil volume to prevent it from raising or backing up in the pipes
2Refrigerant flow stabilization mechanism: prevents refrigerant drift, caused by level difference of indoor units in the same system.
6-1-5 Operation control of small capacity indoor units
If the operating frequency is minimal, the refrigerant pressure and outdoor temperature are detected, the number of control steps are calculated, and
capacity of outdoor unit heat exchanger (refrigerant accumulates in coils) and air flow of outdoor unit fans (controls pole change of the two fans) are
controlled.
If operating a small-capacity indoor unit, the bypass valve is controlled (ON/OFF), with capacity control being executed at a minimum of 14% for a 5HP
outdoor unit (when operating one 20-class indoor unit), or a minimum of 8% for 8 and 10HP outdoor units (when operating one 20-class indoor unit.
6-1-6 Control flow
Minimum Frequency
(5HP Outdoor Unit: 30Hz)
(8/10HP Outdoor Unit: 30Hz)
No
Are you operating a
small-capacity indoor unit?
Yes
Detection of Refrigerant Pressure and Outdoor
Temperature
Step Control Calculation
Bypass Valve On/Off Control
Capacity Control of Outdoor Unit
Heat Exchangers
Air Flow Control of Outdoor
Unit Fans
Deviation (difference between
sensed pressure and desired value)
No Yes
Frequency Alteration of Inverter Compressor
On/Off of ON/OFF Compressor
Outdoor Coil Capacity
Control Air Volume
Control by Outdoor
Unit Fan
Step Control
Calculation
Detection of
Refrigerant Pressure
and Outdoor
Temperature
Sampling Timer Count
Operating Pressure Detection by Pressure Sensors
Calculation of Constant for Integral Control
Total capacity Decision by Multi-Variable P-Control
Optimal Load Decision
Minimum Frequency
Every T Seconds

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• Systems • Introduction
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• Introduction
6Main features
6-2 Energy efficient solution
6-2-1 Low running costs
•VRV systems have low running costs because it permits each zone to be controlled individually. That is, only those rooms that require air conditioning
will be heated or cooled, while the system can be shut down completely in rooms where no air conditioning is required.
•VRV units have the highest COP/EER in the market in the most common operating area
6-2-2 Most advanced reluctance brushless DC compressor technology
The scroll compressor is driven by the newly developed motor, enabling better performance, higher enery efficiency resulting in higher energy cost
savings.
6-2-3 HRV - Heat Recovery Ventilation System
•Heat and humidity are exchanged between supply and exhaust air, which
-brings outdoor air close to indoor air conditions
-recovers energy loss
-realises considerable reduction of air conditioning capacity
•The VAM heat exchanger modulates the humidity and temperature of incoming fresh air to match indoor conditions.
•The balance achieved between indoor and outdoor ambients, enables the cooling/heating load placed on the air conditioning system to be reduced.
(heat and humidity are exchanged)
•Most energy saving solution as smaller indoor units can be selected:
-size down of indoor units down to 40 %
-payback total VAM system: ±2.5 years*
*conditions: outside cooling conditions: 30°C / outside heating conditions: - 8°C
inside cooling conditions: 24°C / inside heating conditions: 22°C
ventilation per room: 150m3/h
•Ideal modular concept to cope with the fresh air requirements
6-2-4 Auto restart capability
Even after exceptionally long power failures, the built-in auto restart capability ensures automatic system start up. Since the preset memory is not erased
by interruptions in power supply, no programme resetting is necessary.
First in the
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First in the
industry

• Introduction
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• Systems • Introduction
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6Main features
6-2 Energy efficient solution
6-2-5 Low operation sound level
•Continuous research by Daikin into reducing operation sound levels has resulted in the development of a purpose designed inverter scroll compressor
and fan.
•The new grille and fan offer low noise, high volume airflow and are housed in a compact casing together with the associated compressor
components. The use of this new technology assembly enables a 16hp unit to be housed in a single casing.
Aero spiral fan:
Bending the fan blade edge reduces turbulence, resulting in less pressure loss
Aero fitting grille:
New shape promotes spiral discharge airflow, resulting in reduced pressure loss
•Night quiet function (max. -8dBA)
During night time, sound level of the outdoor unit can be reduced for a certain period : starting time and ending time can be input
•Daikin indoor units have very low sound operation levels, down to 25 dBA.
NEW
NEW
NOTES
1This function is available in setting at site.
2The relationship of outdoor temperature (load) and time shown in the graph is just an example.
dB(A) Perceived loudness Sound
0Treshold of hearing -
20 Extremely soft Rustling leaves
40 Very soft Quiet room
60 Moderately loud Normal conversation
80 Very loud City traffic noise
100 Extremely loud Symphonic orchestra
120 Threshold of feeling Jet taking off
50
8:00 12:00 16:00 20:00 0:00 4:00 8:00
50
100
Capability %
Load %
Operation
sound dBA
external signal input
to outdoor PCB
Night mode starts
Night mode
ends
58
0
Daikin indoor units

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• Systems • Introduction
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• Introduction
6Main features
6-2 Energy efficient solution
6-2-6 Operation range of outdoor temperature
Standard operation down to -20°C outdoor ambient temperature
Advanced PI control of the outdoor unit enables VRV II heat recovery and Inverter cooling only/heat pump series to operate at outdoor ambients down
to -5°C in cooling mode and down to -20°C in heating mode.
Inverter heat pump
-20°CWB
-5°CDB
Heating
15.5°CWB
Cooling
43°CDB
50
40
30
20
10
-5
-10
-15
-20
First in the
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• Introduction
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• Systems • Introduction
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6Main features
6-3 High reliability
6-3-1 Nr. 1 anti-corrosion treatment
•Special anti corrosion treatment of the heat exchanger provides 5 to 6 times greater resistance against acid rain and salt corrosion. The provision of
rust proof steel sheet on the underside of the unit gives additional protection.
Improvement in corrosion resistance
Performed tests
contents of 1 cycle (7 days):
•24 hours salt spray test SS DIN 50021
•96 hours humidity cycle test KFW DIN 50017
•48 hours room temperature & room humidity
testing period : 5 cycles
contents of 1 cycle (48 hours):
according to DIN50018 (0.21)
testing period : 40 cycles
6-3-2 Double back-up function
In the event of a compressor malfunction, the remotely controlled or field set back-up function in the outdoor unit in question (and also between
different outdoor units) will allow emergency operation of another compressor in order to maintain 8 hour maximum interim capacity
Corrosion resistance rating
Non-treated Anti-corrosion treated
Salt corrosion 1 5 to 6
Acid rain 1 5 to 6
An anti-corrosion heat exchanger cutaway vie
w
Hydrophilic film
Aluminium
Corrosion-resistant Acrylic resin
Heat exchanger
1 VDA Wechseltest
8
6
4
2
0
Corrosion resistance
Cycle
1 2 3 4 5
Daikin P.E.
Bare aluminium
2 Kesternich test (SO2)
10
9
8
7
6
5
4
3
2
1
0
Corrosion resistance
Cycle
1 2 3 4 5 6 10 20 30 40
Daikin P.E.
Bare aluminium

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• Systems • Introduction
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• Introduction
6Main features
6-3 High reliability
6-3-3 Duty cycling
The cyclical start-up sequence of multiple outdoor unit systems equalises compressor duty and extends operating life.
6-3-4 Special oil equalising technology
The incorporation of this technology ensures that the optimum quantity of oil is contained in each outdoor unit module in order to maintain compressor
reliability. Automatic checks are carried out every 6 minutes on the number of compressors in operation and also to ascertain that there is enough oil to
keep them running. In the event of a shortage being indicated, oil can be piped from other outdoor units in the system via the oil balancing pipe linking
multiple systems.
Each compressor in a VRV II outdoor unit is equipped with an internal oil equalising circuit, comprising an oil separator and oil return circuit. This ensures
that the maximum quantity of oil is returned to the compressor case before entering the REFNET piping network. The oil equalising circuit of each
outdoor unit is linked to those of the other outdoor units, allowing additional reliability and oil circulation during partial load operations.
6-3-5 No standby equipment required
Conventional VAV (Variable Air Volume) systems and chiller/fan coil systems require expensive and bulky standby units in case of breakdown. Since most
outdoor units of the VRV system comprise a number of independent compressors, the system as a whole will continue to function in the event of a unit
breakdown.

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• Systems • Introduction
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6Main features
6-4 Eco friendly
6-4-1 Lowest refrigerant amount in the total system
6-4-2 Dramatic reduction in initial refrigerant charge
6-4-3 Optimised R-410A design
Daikin Europe has achieved a quantum leap forward in commercial air conditioning technology by the introduction of its VRV II, the world’s first R-410A
operated variable refrigerant flow system. Available in cooling only, heat pump and heat recovery versions, the new system, which represents a
considerable advance over earlier VRV systems, demonstrates Daikin’s innovative application of new technology and the latest HFC refrigerants to its
VRV product programmes.
6-4-4 Less waste and improved re-cycling
The lead free, soldered PCB obviates environmental contamination, whilst the re-cyclable galbarium steel bottom plate is designed to last around 6 times
longer than the traditional galvanised base.
6-4-5 Refrigerant recovery function
The refrigerant recovery function enables all expansion valves to be opened. In this way the refrigerant can be drained from the piping system and
stored in the receiver and the condenser.
18 HP Comparable VRF system
Total refrigerant amount in the system* 100 % 160 %
NOTE
*based on average installation
16 HP R-22
VRV-K series
R-407C
VRV-K series
R-410A
series
Refrigerant charge 100 % 85.6 % 79.5 %
Reduction
of 20.5 %

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• Systems • Introduction 19
• Introduction
6Main features
6-5 Easy and flexible design
6-5-1 Total room layout flexibility
•VRV II systems are easily adaptable to changes in room layout : extra indoor units can be added to a VRV outdoor unit up to a capacity level of 130%.
•Also, since VRV II heat recovery systems offer simultaneous cooling and heating, existing indoor and outdoor units can continue to provide year
round air conditioning from their existing locations, even if office layouts are altered or extended.
6-5-2 Complete flexibility
•The VRV II system enables different floors or even rooms to be rented to different customers, because each room has independent control of its air
conditioning.
•Thanks to inverter technology, as many as 40 indoor units with different types and capacities can be installed in one system. This system automatically
and effectively controls each unit to provide individual rooms of different sizes with a comfortable working or living environment.
6-5-3 Efficient use of space
The VRV II system allows you to use the available space more efficiently. Instead of having to incorporate a machine room in to your building plans, you
can use this space for other purposes, such as a garage.
Room layout change
Indoor unit
addition
Office
Reception room
Stock room
Office
Meeting room
Meeting room
Meeting room
Meeting room
➔