RWEYQ_Installation Manual (Part 2 of 2)

RWEYQ_Installation Manual (Part 2 of 2)
EDUS30-607-N
4.3
REFNET Pipe System
Outdoor Unit Multi Connection Piping Kit
BHFP22MA56 · 84U, BHFP26MA56 · 84U
Installation of Outdoor Units
25
REFNET Pipe System
EDUS30-607-N
1P185542
26
Installation of Outdoor Units
EDUS30-607-N
Installation
5. Installation
RWEYQ60, 72, 84, 144, 168, 216, 252MTJU
[3]
≤13-3/4
30-11/16
7
1
7
8
7
6
≥15-3/8
9
≥13/16
2
≥35-7/16
≥11-13/16
figure 1
1
≥13/16
∗10
≥13-3/4
5
≥60
≥60
≥60
5
≥13/16
39-3/8
≥40
≥40
≥60
[4]
4
0
≥4
≥13/16
6
9
2
3
8
6
21-5/8 ≥19-11/16
2
9
9
8
3
≥19-11/16
2
≥13/16
1
≥35-7/16
5.1
8
≥3-15/16
≤9-13/16
(in.)
figure 3
figure 2
3-1/8
3
12
3-1/8
13
15-3/4
2
29-5/16
1
1
2
4
14
9
6
8
60
3
7
[1]
5
11
10
figure 6
1
2
4
3
2
5
7
6
8
9
4
10
11
figure 4
figure 5
figure 7
[Heat pump system]
[Heat recovery system]
3
4
3
4
1
7
2
2
2
3
10
5
4
1
7
1
8
10
5
4
9
6
figure 8
Installation of Outdoor Units
9
6
figure 9
27
Installation
EDUS30-607-N
[Heat pump system]
[Heat recovery system]
7
A
ABC
B
C
7
F1 F2 F1 F2 Q1 Q2
A
B
C
F1 F2 F1 F2 Q1 Q2
C/H SELECTOR
TO IN/D UNIT TO OUT/D UNIT TO MULTI UNIT
A1P
A1P
A B C F1 F2 F1 F2 Q1 Q2
A B C F1 F2 F1 F2 Q1 Q2
C/H SELECTOR
1
TO IN/D UNIT TO OUT/D UNIT TO MULTI UNIT
2
2
4
3
F1 F2
F1 F2
F1 F2
F1 F2 F1 F2
IN/D
OUT/D.BS
F1 F2 F1 F2
IN/D
OUT/D.BS
F1 F2 F1 F2
IN/D
OUT/D.BS
8
9
10
4
6
5
F1 F2
F1 F2
F1
F2
F1
F2
F1
F1
F2
F1
F2
F2
F1 F2
F1
F2
11
6
F1 F2
F1 F2
F1 F2
figure 10
2
1
A1P
3
A
A1P
5
4
6
A B C F1 F2 F1 F2 Q1 Q2
6
6
Q1 Q2
Q1 Q2
X1M
B
C
X2M
1
1
4
X3M
3 4
2
9
7
2
F1 F2 F1 F2 Q1 Q2
3
8
figure 11
figure 12
1
2
3
1
2
4
LOW NOISE
TO OUT/D UNIT
F1 F2
F1 F2
TO OUT/D UNIT
F1 F2
TO OUT/D UNIT
F1 F2
F1 F2
6
5
F1 F2
F1 F2
F1 F2
F1 F2
7
figure 13
figure 14
1
12
2
13
14
15
11
7
4
9
3
6
10
5
8
figure 15
28
Installation of Outdoor Units
EDUS30-607-N
Installation
O
U
T
A1P
TO IN/D
UNIT
F1 F2
O
U
T
A1P
ON
ON
DS1
OFF
1
I
N
2
3
4
DS1
OFF
ABC
1
I
N
2
3
1
4
6
2
3
F1 F2
P1 P2
4
1
ABC
P1 P2
5
3
1
figure 16
figure 17
figure 18
2
1
[Heat pump system]
1
2
7
3
4
8
9
5
5
4
∗6
3
10
[Heat recovery system]
7
11
8
10
9
[13]
4
14
11
15
5
16
6
12
figure 19
∗17
figure 20
4
1
2
1
3
2
A
B
5
3
[A-arrow view]
figure 21
[B-arrow view]
figure 22
(Fig. A)
C
1
(Fig. B)
(Fig. C)
1
2
5
D
±15
3
3
[C-arrow view]
[D-arrow view]
4
figure 23
Installation of Outdoor Units
29
Installation
EDUS30-607-N
[Heat pump system]
11
10
1
10
12
9
R-410A
7
3
4
2
15
16
5
6
18
[Heat recovery system]
14
13
1
10
10
12
9
R-410A
7
3
4
2
8
15
17
5
6
18
figure 24
4
[Heat pump system]
3
1
2
[Heat recovery system]
1
2
1
5
5
2
3
2
3
6
4
4
5
1
figure 25
30
figure 26
4 3
figure 27
Installation of Outdoor Units
EDUS30-607-N
1.
SAFETY CONSIDERATIONS
Please read these “SAFETY CONSIDERATIONS” carefully before
installing air conditioning unit and be sure to install it correctly. After
completing the installation, make sure that the unit operates properly
during the start-up operation. Please instruct the customer on how to
operate the unit and keep it maintained.
Also, inform customers that they should store this installation manual
along with the operation manual for future reference.
This air conditioner comes under the term “appliances not accessible
to the general public”.
〈Safety Precaution〉
VRV System is a class A product. In a domestic environment this
product may cause radio interference in which case the user may be
required to take adequate measures.
Meaning of danger, warning, caution and note symbols.
DANGER.....................Indicates an imminently hazardous
situation which, if not avoided, will result
in death or serious injury.
WARNING ...................Indicates a potentially hazardous
situation which, if not avoided, could
result in death or serious injury.
CAUTION ....................Indicates a potentially hazardous
situation which, if not avoided, may result
in minor or moderate injury. It may also
be sued to alert against unsafe practices.
NOTE ..........................Indicates a situation that may result in the
unit or property-damage-only accidents.
DANGER
• Refrigerant gas in heavier air and replaces oxygen. A
massive leak could lead to oxygen depletion, especially in
basements, and an asphyxiation hazard could occur leading
to serious injury or death.
• Do not ground units to water pipes, telephone wires or lightning rods because incomplete grounding could cause a severe shock hazard resulting in severe injury or death, and to
gas pipes because a gas leak could result in an explosion
which could lead to severe injury or death.
• If the refrigerant gas leaks during installation, ventilate the
area immediately.
Refrigerant gas may produce toxic gas if it comes in contact with
fire such as from a fan, heater, stove or cooking device. Exposure to
this gas could cause severe injury or death.
• After completing the installation work, check that the refrigerant gas does not leak.
Refrigerant gas may produce toxic gas if it comes in contact with
fire such as from a fan, heater, stove or cooking device. Exposure to
this gas could cause severe injury or death.
• Do not install unit in an area where flammable materials are
present due to risk of explosion resulting in serious injury
or death.
• Safely dispose of the packing materials.
Packing materials, such as nails and other metal or wooden parts,
may cause stabs or other injuries.
Tear apart and throw away plastic packaging bags so that children
will not play with them. Children playing with plastic bags face the
danger of death by suffocation.
WARNING
• Ask your dealer or qualified personnel to carry out installation work. Do not try to install the unit by yourself. Improper
installation may result in water leakage.
• Perform installation work in accordance with this installation manual. Improper installation may result in water leakage, electric shocks or fire.
Installation of Outdoor Units
Installation
• Install the air conditioner on a foundation strong enough to
withstand the weight of the unit.
A foundation of insufficient strength may result in the unit falling and
causing injuries.
• Carry out the specified installation work after taking into account strong winds, typhoons or earthquakes.
Improper installation may result in the unit falling and causing accidents.
• When installing the unit in a small room, take measures
against to keep refrigerant concentration from exceeding allowable safety limits in the event of refrigerant leakage.
Contact the place of purchase for more information. Excessive
refrigerant in a closed ambient can lead to oxygen deficiency.
• Be sure to use only the specified accessories and parts for
installation work.
Failure to use the specified parts may result in water leakage,
electric shocks, fire or the unit falling.
• Before touching electrical parts, turn off the unit.
• Securely install the outside unit terminal cover (panel).
If the terminal cover (panel) is not installed properly, dust or water
may enter the outside unit and fire or electric shock may result.
• When installing or relocating the system, be sure to keep
the refrigerant circuit free from substances other than the
specified refrigerant (R-410A), such as air.
Any presence of air or other foreign substance in the refrigerant circuit causes an abnormal pressure rise or rupture, resulting in injury.
• Do not reconstruct or change the settings of the protection
devices.
If the pressure switch, thermal switch, or other protection device is
shorted and operated forcibly, or parts other than those specified by
Daikin are used, fire or explosion may result.
• Do not touch the switch with wet fingers.
Touching a switch with wet fingers can cause electric shock.
• Do not allow children to play on or around the unit as they
could be injured.
• Refrigerant pipes may be very hot or very cold during or immediately after operation.
Touching them could result in burns or frostbite. To avoid injury give
the pipes time to return to normal temperature or, if you must touch
them, be sure to wear proper gloves.
• Be sure to install a ground fault circuit interrupter.
Failure to install an earth leakage breaker may result in electric
shocks, or fire.
CAUTION
• While following the instructions in this installation manual,
install drain piping in order to ensure proper drainage and
insulate piping in order to prevent condensation.
Improper drain piping may result in water leakage and property
damage.
• Be very careful about product transportation.
• Make sure a separate power supply circuit is provided for
this unit and that all electrical work is carried out by qualified personnel according to local laws and regulations and
this installation manual. An insufficient power supply capacity
or improper electrical construction may lead to electric shocks or
fire.
• Do not touch the refrigerant pipes during and immediately
after operation.
During and immediately after operation, the refrigerant pipes may
be hot and may be cold, depending on the condition of the refrigerant flowing through the refrigerant piping, compressor, and other
refrigerant cycle parts. Your hands may suffer burns or frostbite if
you touch the refrigerant pipes.
• Do not turn off the power immediately after stopping operation.
Always wait at least five minutes before turning off the power.
Otherwise, water leakage and trouble may occur.
31
Installation
• Do not use a charging cylinder.
Using a charging cylinder may cause the refrigerant to deteriorate.
• The refrigerant R-410A requires strict cautions for keeping
the system clean, dry and tight.
A.Clean and dry
Foreign materials (including mineral oils such as SUNISO oil or
moisture) should be prevented from getting mixed into the
system.
B.Tight
R-410A does not contain any chlorine, does not destroy the ozone
layer, and does not reduce the earth’s protection against harmful
ultraviolet radiation.
R-410A can contribute slightly to the greenhouse effect if it is
released. Therefore we should take special attention to check the
tightness of the installation.
Read the chapter “Refrigerant piping” carefully and follow these
procedures correctly.
• Since R-410A is a mixed refrigerant, the required additional
refrigerant must be charged in its liquid state. (If the
refrigerant is charged in a state of gas, its composition
changes and the system will not work properly.)
The indoor unit is for R-410A. See the catalog for indoor unit models
which can be connected.
(Normal operation is not possible when connected to other units.)
• Remote controller (wireless kit) transmitting distance can
result shorter than expected in rooms with electronic
fluorescent lamps. (inverter or rapid start types)
Install the indoor unit as far away from fluorescent lamps as
possible.
• Install in a machine room that has no water drops.
This unit is for indoor use.
• Do not install the air conditioner in the following locations:
(a) where a mineral oil mist or an oil spray or vapor is produced, for
example in a kitchen
Plastic parts may deteriorate and fall off or result in water leakage.
(b) where corrosive gas, such as sulfurous acid gas, is produced
Corroding copper pipes or soldered parts may result in
refrigerant leakage.
(c) near machinery emitting electromagnetic waves
Electromagnetic waves may disturb the operation of the control
system and result in a malfunction of the unit.
(d) where flammable gas may leak, where there are carbon fiber or
ignitable dust suspensions in the air, or where volatile
flammables such as thinner or gasoline are handled.
Operating the unit in such conditions may result in fire.
EDUS30-607-N
2.
INTRODUCTION
This installation manual concerns VRV inverters of the Daikin
RWEYQ-M series. These units are designed for indoor installation
and used for cooling and heat pump applications.
The RWEYQ-M units can be combined with Daikin VRV series indoor
units for air conditioning purposes.
The present installation manual describes the procedures for unpacking, installing and connecting the RWEYQ-M units. Installation of the
indoor units is not described in this manual. Always refer to the
installation manual supplied with these units for their installation.
2-1 Combination
The indoor units can be installed in the following range.
• Always use appropriate indoor units compatible with R-410A.
To lean which models of indoor units are compatible with
R-410A, refer to the product catalogs.
• Total capacity/quantity of indoor units
〈Outside unit〉
〈Total capacity index of indoor units〉 〈Total quantity of indoor units〉
RWEYQ60MTJU............... 36 ~ 78
10 units
RWEYQ72MTJU............... 36 ~ 93.5
12 units
RWEYQ84MTJU............... 42 ~ 109
14 units
RWEYQ144MTJU............. 72 ~ 187
20 units
RWEYQ168MTJU............. 84 ~ 218
20 units
RWEYQ216MTJU........... 108 ~ 280
22 units
RWEYQ252MTJU........... 126 ~ 327.5
32 units
2-2 Standard operation limit
The figures below assume following operating conditions for indoor
and outside units:
Equivalent pipe length...................................................... 25 ft
Level difference.................................................................. 0 ft
Cooling
Heating
A
A
120
120
110
110
100
100
90
90
80
80
70
70
60
60
50
• Make sure to provide for adequate measures in order to prevent that the outdoor unit be used as a shelter by small animals.
Small animals making contact with electrical parts can cause malfunctions, smoke or fire. Please instruct the customer to keep the
area around the unit clean.
• Make sure all wiring is secured, all specific wiring used and
no external forces act on connections. Position writing securely to prevent shocks, fire, or the terminals overheating.
NOTE
• Install the indoor and outside units, power supply wires and
transmission wires at least 3.5ft. away from televisions or
radios in order to prevent image interference or noise.
(Depending on the radio waves, a distance of 3.5ft. may not be
sufficient to eliminate the noise.)
• Dismantling of the unit, treatment of the refrigerant, oil and
eventual other parts, should be done in accordance with the
relevant local and national regulations.
• Do not use the following tools that are used with conventional refrigerants. (Gauge manifold, charge hose, gas leak
detector, reverse flow check valve, refrigerant charge base,
vacuum gauge, refrigerant recovery equipment.)
If the conventional refrigerant and refrigerator oil are mixed in the
R-410A, the refrigerant may deteriorate.
32
50
50
60
70
80
90
50
B
A
B
C
60
70
80
90
C
Inlet water temperature (°F)
Indoor temperature (°FWB)
Indoor temperature (°FDB)
Range for continuous operation
Range for operation
Range for pull down operation
Range for warming up operation
• Operation range of water volume is 13.2~39.5 gpm
• The unit is designed for the following operation range:
Water temperature: 67~95°F
Water volume: 16 gpm or more
• During cooling operation when the outside temperature is very low,
it is possible that the thermostat switches off automatically in order
to protect the unit from freezing.
• Hold ambient temperature at 35~95°F
Heat-release from the unit: 0.64 kW / hour for Models 60, 72, and
0.71 kW/ hour for Model 84.
It is therefore recommended to always ventilate the room.
Installation of Outdoor Units
EDUS30-607-N
Installation
2-3 Standard supplied accessories
2-5 Technical specifications (1)
• Make sure that the following accessories are included.
(Check by removing the front panel.)
General
Accessory pipes
Name
Quantity
For discharge
gas
For suction
gas (1)
For suction
gas (2)
Clamp (A)
1 pc.
1 pc.
1 pc.
7 pcs.
Clamp (B)
2 pcs.
(Note)
Black
White
Strainer
Quantity
1 pc.
60
72
84
Nominal cooling capacity (3) (MBh)
67.5
81
94.5
Nominal input cooling / heating (4) (kW)
3.41 / 3.20
4.20 / 4.00
5.60 / 5.40
Dimensions HxWxD
(inch)
39-3/8×30-3/4×21-11/16
Weight
(lbs)
330
330
330
refrigerant liquid pipe
(inch)
3/8
3/8
3/8
refrigerant gas pipe
(inch)
3/4
3/4
7/8
refrigerant discharge gas pipe (5) (inch)
5/8
5/8
3/4
Connections
Shape
Name
RWEYQ60MTJU RWEYQ72MTJU RWEYQ84MTJU
Nominal cooling capacity (2) (MBh)
Water piping connections
Conduit mounting plate
2 pcs.
2 pcs.
[Others]
• Installation manual
• Operation manual
Shape
Inlet pipe
1-1/4FPT
1-1/4FPT
1-1/4FPT
(inch) female
Thread female Thread female Thread
Outlet pipe
1-1/4FPT
1-1/4FPT
1-1/4FPT
(inch) female
Thread female Thread female Thread
Drain pipe
1/2FPS
1/2FPS
1/2FPS
(inch) female
Thread female Thread female Thread
RWEYQ144MTJU
RWEYQ168MTJU
Nominal cooling capacity (2) (MBh)
144
168
Nominal cooling capacity (3) (MBh)
162
189
Nominal input cooling / heating (4) (kW)
8.40 / 8.00
11.20 / 10.80
General
(Refer to figure 1)
1. • Operation manual
• Installation manual
• Clamp (A)
• Clamp (B)
• Conduit mounting plate
2. Accessory pipes
• For discharge gas
• For suction gas (1)
• For suction gas (2)
3. Strainer
Dimensions HxWxD
(inch)
Weight
(lbs)
(39-3/8×30-3/4×21-11/16)×2
330×2
330×2
Connections
refrigerant liquid pipe
(inch)
1/2
5/8
refrigerant gas pipe
(inch)
1-1/8
1-1/8
7/8
7/8
refrigerant discharge gas pipe (5) (inch)
Water piping connections
NOTE
The accessory pipe for discharge gas is used for the heat recovery
system. (Not used for the heat pump system.)
2-4 Option accessory
To install the above outside units, the following optional parts are also
required.
• Refrigerant branching kit
(For R-410A only: Always use an appropriate kit dedicated for your
system.)
〈Heat pump system〉
REFNET header KHRP26M22H
REFNET joint
KHRP26M22T
KHRP26M33H KHRP26M72H KHRP26M73HU
KHRP26M33T KHRP26M72TU KHRP26M73TU
〈Heat recovery system .....For 3-tube piping〉
REFNET header
REFNET joint
KHRP25M22T
KHRP25M33H KHRP25M72H KHRP25M73HU
KHRP25M33T KHRP25M72TU KHRP25M73TU
〈Heat recovery system .....For 2-tube piping〉
REFNET header KHRP26M22H KHRP26M33H KHRP26M72H KHRP26M73HU
REFNET joint
KHRP26M22T KHRP26M33T KHRP26M72TU KHRP26M73TU
• Outside unit multi connection piping kit
(For R-410A only: Always use an appropriate kit dedicated for
your system.)
Number of outside units
connected
2 units
3 units
Heat pump system
BHFP22MA56U
BHFP22MA84U
Heat recovery system
BHFP26MA56U
BHFP26MA84U
∗ To select an optimum kit, refer to “9. REFRIGERANT PIPING”
Installation of Outdoor Units
Inlet pipe
(inch)
(1-1/4FPT)×2
female Thread
(1-1/4FPT)×2
female Thread
Outlet pipe
(inch)
(1-1/4FPT)×2
female Thread
(1-1/4FPT)×2
female Thread
Drain pipe
(inch)
(1/2FPS)×2
female Thread
(1/2FPS)×2
female Thread
RWEYQ216MTJU
RWEYQ252MTJU
General
Nominal cooling capacity (2) (MBh)
216
252
Nominal cooling capacity (3) (MBh)
243
283.5
12.60 / 12.00
16.80 / 16.20
Nominal input cooling / heating (4)
(kW)
Dimensions HxWxD
(inch)
Weight
(lbs)
(39-3/8×30-3/4×21-11/16)×3
330×3
330×3
Connections
refrigerant liquid pipe
(inch)
5/8
3/4
refrigerant gas pipe
(inch)
1-1/8
1-1/4
1
1-1/8
refrigerant discharge gas pipe (5) (inch)
Water piping connections
Inlet pipe
(inch)
(1-1/4FPT)×3
female Thread
(1-1/4FPT)×3
female Thread
Outlet pipe
(inch)
(1-1/4FPT)×3
female Thread
(1-1/4FPT)×3
female Thread
Drain pipe
(inch)
(1/2FPS)×3
female Thread
(1/2FPS)×3
female Thread
(1) Refer to the engineering data book for the complete list of specifications.
(2) The normal cooling capacities are based on:
–indoor temperature:
80 °FDB / 67 °FWB,
–inlet water temperature:
85 °F,
–outlet water temperature:
95 °F,
–equivalent pipe length:
25 ft,
–level difference:
0 ft
(3) The normal heating capacities are based on:
–indoor temperature:
70°FDB / 60 °FWB,
–inlet water temperature:
70 °F,
–equivalent pipe length:
25 ft,
–level difference:
0 ft
(4) The nominal input includes total input of the unit: compressor and control circuit.
(5) In case of heat recovery system
33
Installation
EDUS30-607-N
Compressor
RWEYQ60MTJU RWEYQ72MTJU RWEYQ84MTJU
Synthetic
(ether) oil
Oil type
Crankcase heater
(W)
Refrigerant type
Refrigerant charge
(lbs)
Synthetic
(ether) oil
Synthetic
(ether) oil
33
33
33
R-410A
R-410A
R-410A
9.9
9.9
11.5
Compressor
RWEYQ144MTJU
RWEYQ168MTJU
Oil type
Synthetic (ether) oil
Synthetic (ether) oil
Crankcase heater
(W)
Refrigerant type
Refrigerant charge
(lbs)
(33)×2
(33)×2
R-410A
R-410A
(9.9)×2
(11.5)×2
Compressor
RWEYQ216MTJU
RWEYQ252MTJU
Oil type
Synthetic (ether) oil
Synthetic (ether) oil
Crankcase heater
(W)
Refrigerant type
Refrigerant charge
(lbs)
(33)×3
(33)×3
R-410A
R-410A
(9.9)×3
(11.5)×3
2-6 Electrical specifications
RWEYQ60MTJU RWEYQ72MTJU RWEYQ84MTJU
Model
Power supply
Phase
3~
3~
Frequency
(Hz)
60
60
3~
60
Voltage
(V)
208-230
208-230
208-230
Voltage tolerance
(%)
±10
±10
±10
Recommended fuses
(A)
40
40
40
3~
Compressor
Phase
3~
3~
Frequency
(Hz)
60
60
60
Voltage
(V)
208-230
208-230
208-230
Nominal running current
(A)
9.4
11.6
15.4
Model
RWEYQ144MTJU
RWEYQ168MTJU
3~
3~
Power supply
Phase
Frequency
(Hz)
60
60
Voltage
(V)
208-230
208-230
Voltage tolerance
(%)
±10
±10
Recommended fuses
(A)
(40)×2
(40)×2
3~
3~
Compressor
Phase
Frequency
(Hz)
60
60
Voltage
(V)
208-230
208-230
Nominal running current
(A)
(11.6)×2
(15.4)×2
RWEYQ216MTJU
RWEYQ252MTJU
3~
3~
Model
Power supply
Phase
Frequency
(Hz)
60
60
Voltage
(V)
208-230
208-230
Voltage tolerance
(%)
±10
±10
Recommended fuses
(A)
(40)×3
(40)×3
3~
3~
Compressor
Phase
Frequency
(Hz)
60
60
Voltage
(V)
208-230
208-230
Nominal running current
(A)
(11.6)×3
(15.4)×3
34
Installation of Outdoor Units
EDUS30-607-N
SELECTION OF LOCATION
This unit does not have specifications for outdoor installation.
The unit must be installed indoors (example: machine room, …).
Paying attention to the conditions mentioned below, select the place
for installation with a prior approval of customer.
1. The foundation is strong enough to support the weight of the unit
and the floor is flat to prevent vibration and noise generation.
2. Consider the space required for refrigerant piping work when
installing. Refer to [Necessary Space].
3. There is no danger of fire due to leakage of inflammable gas.
4. The piping length between the outside unit and the indoor unit may
not exceed the allowable piping length. “9. REFRIGERANT PIPING”.
5. Locations where the noise of the unit operating will not disturb
nearby houses, etc.
6. Locations with airflow and ventilation holes capable of dissipating
heat from the machine and where the ambient temperature around
the outside unit is between 35 and 95 °F and the humidity does not
exceed 80%.
[Necessary Space]
When installing, secure the space mentioned below without fail.
(Refer to figure 2)
1. In case of a single installation [inch.]
2. In case of series installations [inch.]
3. Top view
4. Side view
5. Outside unit
6. Service Space (front side)
7. Service Space (back side)
8. Space for installing water piping
∗Secure a enough space for removing the front panel.
9. Ventilation Space
∗above the area (
) of the outside unit.
10. Secure spaces in the front, back and top sides as same
as the case of single installation.
DANGER
• Do not install unit in an area where flammable materials are
present due to risk of explosion resulting in serious injury or
death.
• Refrigerant is heavier than air and replaces oxygen. A massive
leak could lead to oxygen depletion, especially in basements,
and an asphyxiation hazard could occur leading to serious injury
or death. Refer to the chapter “Caution for refrigerant leaks”.
NOTE
1. An inverter air conditioner may cause electronic noise
generated from AM broadcasting. Examine where to install the
main air conditioner and electric wires, keeping proper
distances away from stereo equipment, personal computers,
etc.
(Refer to figure 3)
1. Indoor unit
2. Branch switch, overcurrent breaker
3. Remote controller
4. Cool/heat selector
5. Personal computer or radio
If the electric wave of AM broadcasting is particularly weak, keep
distances of 10 ft or more and use conduit tubes for power and
transmission lines.
2. Water quality
Water containing high level of foreign materials may cause the
corrosion of heat exchanger and piping or scale accumulation.
Use water satisfying “7-4 Water quality”.
3. Cooling tower
Use a closed type cooling tower without fail. (Open type tower
cannot be used.)
4. Strainer
Install the strainer (accessory) without fail at the inlet of water
piping. (If sands, wastes, rust particles, etc. are mixed in the
water circulation system, damage to the plate type heat
exchanger may be caused by the corrosion of metal materials
and clogging of the heat exchanger.)
Installation of Outdoor Units
WARNING
Do not install in the following locations.
• Locations such as kitchens which contain a lot of mineral oil or
steam in the atmosphere or where oil may splatter on the unit.
Resin parts may deteriorate, causing the unit to fall or leak.
• Locations where sulfurous acids and other corrosive gases
may be present in the atmosphere.
Copper piping and soldered joints may corrode, causing
refrigerant to leak.
• Locations where equipment that produces electromagnetic
waves is found.
The electromagnetic waves may cause the control system to
malfunction, preventing normal operation.
4.
INSPECTING AND HANDLING THE UNIT
At delivery, the package should be checked and any damage should
be reported immediately to the carrier claims agent.
When handling the unit, take into account the following:
1.
Fragile, handle the unit with care.
Keep the unit upright in order to avoid compressor damage.
2. Choose the path along which the unit is to be brought in ahead of
time.
3. In order to prevent any damage to the unit during installation, use
slings (cloth) or patch plates and lift the unit referring to figure 4.
4. Lift the unit preferably with a crane and 2 belts of at least 27 ft long.
5. When lifting the unit with a crane, always use protectors to prevent
belt damage and pay attention to the position of the unit’s center of
gravity.
6. Be sure use the standard supplied accessories and dedicated
parts as installation parts.
(Refer to figure 4)
1. Patch plates or clothes
2. Belt sling
NOTE
• Use belt sling of 13/16” width or less which adequately bears the
weight of the product.
5.
UNPACKING AND PLACING THE UNIT
• Make sure the area around the machine drains properly by setting
up drainage grooves around the foundation.
• Make sure the unit is installed level on a sufficiently strong base to
prevent vibration and noise.
• Secure the unit to its base using foundation bolts. (Use four
commercially available M12-type foundation bolts, nuts, and
washers.)
• The foundation bolts should be inserted 13/16”.
• Fix 4 foundation bolts.
• Support the unit with the foundation which is
larger than the hatched area shown in figure 5.
(Refer to figure 5)
1. Front side
2. Position of foundation bolts
3. Hole for a foundation bolt
(φ11/16 ida. holes at 4 corners)
4. Avoid such a foundation where the unit is supported by
4 corner points.
13/16”
3.
Installation
CAUTION
• When installing the unit closely contacting the wall for any
unavoidable reason, arrange so that no vibration from the unit
may be transmitted to the wall surface by insulating the vibration
using cushions, etc.
35
Installation
EDUS30-607-N
7.
NOTE
• Prepare a water drainage channel around the foundation to condensate waste water from around the unit.
• If the unit is to be installed on a roof, check the strength of the roof
and its drainage facilities first.
• Make sure the area around the machine drains properly by setting
up drainage grooves around the foundation.
(Condensate water is sometimes discharged from the outside unit
when it is running.)
• Use a nut with a resin clip plate to protect the nut tightening part
from rusting.
CAUTION
A brazed plate type heat exchanger is used for this unit. Because
its structure is different from a conventional type heat exchanger,
it must be handled in a different manner.
7-1 When designing the equipment
1. Install the strainer (accessory) at the water inlet side adjacent to
Resin clip plate
2.
6.
WATER PIPING WORK
• The water pressure resistance of water piping of this outside unit is
285 psi.
• The connection port for water piping is located in the front. The
connection ports for drain piping are located in the front and back.
When using the back port, change the cast iron plug from the back
to the front and securely close it.
• Because of indoor use, carry out piping work in such a way no
water may drop on the outer plate.
• Drain piping should be short and have a slant downwards.
The diameter of drain pipe should be the same as the diameter of
unit connection (1/2) or more.
• The diameter of water pipe should be the same as the diameter of
unit connection (1-1/4) or more.
• Install an air purge valve in the midway of the water piping to
prevent cavitation.
• After completing the drain piping work, make sure that the water
runs smoothly without any clogging by dust.
• Do not connect the drain outlet to the water outlet.
• Install the strainer (accessory) in the inlet of water piping within a
distance of 4.9 ft from the outside unit.
(If sand, waste or rust particles are mixed in the water circulation
system, metal materials will become corrosive.)
• Install insulation on the inlet/outlet of water piping to prevent
condensation and freezing.
At installing insulation on water in/outlet pipe, use Polyurethane
form thickness 3/16 in. for insulation of water piping socket on heat
exchanger.
• Install insulation up to the base of heat exchanger as shown in the
figure 6.
• Install a gate valve for chemical cleaning in an easy position to
handle.
• Use water pipes complied with the local and national codes.
• Run the water pump to flush inside of water piping.
Then, clean the strainer.
• If there is a possibility of freezing, take measures to prevent freezing.
• Tighten securely the connection of water piping and socket with
tightening torque of 220 lbf·ft or less.
(If a large torque is applied, the unit may be damaged.)
(Refer to figure 6)
1. Air parge
2. Outlet of water
3. Inlet of water
4. Gate valve
5. Water piping socket
6. Water piping
7. Insulation
8. Heat exchanger
9. Strainer (accessory)
10. Drain valve
11. Connection port to draining piping
12. Insulation cover
13. 3-1/8 in. or less
14. Insulation of water piping socket
HANDLING OF THE BRAZED PLATE
TYPE HEAT EXCHANGER
3.
4.
5.
6.
the outside unit in order to prevent any foreign materials such as
dust, sand, etc. from entering.
Depending on the water quality, scale may stick to the plate type
heat exchanger. In order to remove this scale, it is necessary to
clean it at a regular interval using chemicals. To this end, install a
gate valve in the water piping. Set up a piping connection port on
the piping between this gate valve and the outside unit for cleaning
by chemicals.
For the purpose of cleaning and water drain off from the outside unit
(water draining during a long period of non-use in winter, draining
upon starting of season-off), install an “air discharge plug” and a
“water draining plug” at the inlet/outlet ports of water piping. In addition, install an “automatic air discharging valve” at the top of riser
piping or at the top of a portion where air tends to stay.
Independent of the piping inlet of the outside unit, install a
cleanable strainer at a portion close to the pump piping inlet.
Carry out complete cooling/thermal insulation of water piping and
outdoor dehumidification. If complete cooling or thermal insulation
has not been carried out, any damage may be caused during
severe winter due to freezing, in addition to thermal loss.
When you stop operation during night or winter, it is necessary to
take measures to prevent water related circuits from natural
freezing in the area the ambient temperature drops below 32°F (by
water drain off, keeping the circulation pump running, warming up
by a heater, etc.) Freezing of water related circuits may result in any
damage to the plate type heat exchanger. Therefore, please take
appropriate measures depending on the circumstances of use.
(Refer to figure 7)
1. Example of piping
2. Water inlet piping
3. Strainer (accessory)
4. Air discharge plug (for joint use with cleaning port)
5. Cleaning device
6. Strainer for pump
7. Automatic air discharge valve
8. Water outlet piping
9. Joint use with water draining plug
10. Plate type heat exchanger
11. Outside unit
7-2 Before starting a test run
1. Before starting a test run, please make sure that the piping work
has been carried out in a proper manner. Especially, make sure that
the strainer, air discharge valve, automatic water supply valve,
expansion tank and cistern are positioned at their places correctly.
2. After water has been completely filled in, first run the pump only,
and then make sure that no air has been caught in the water
circulation system and the water flow rate is correct. If any air has
been caught or the flow rate is not enough, the plate type heat
exchanger may freeze. Measure any water pressure loss before
and after the outside unit and make sure that the flow rate is as
designed. In case of any abnormal, stop the test run immediately
and carry out trouble shooting to resolve the trouble.
3. Following the installation manual, carry out a test run of the outside
unit.
4. After the test run has been completed, inspect the strainer at the
inlet piping of the outside unit. Clean it if it is dirty.
7-3 Daily service and maintenance
1. Management of water quality
The plate type heat exchanger has a structure that does not permit
dismantling and cleaning, or replacing any parts. Please pay
36
Installation of Outdoor Units
EDUS30-607-N
Installation
attention carefully to the quality of water to be used for the plate type
heat exchanger in order to prevent corrosion and sticking of scale.
The water to be used for the plate type heat exchanger should have
at least the quality as specified in the table below.
When using any corrosion prevention agent, scale depressant
agent, etc, such agent should have no corrosive features against
stainless steel and copper.
2. Management of chilled water flow rate
If the chilled water flow rate is not enough, it will result in the
freezing damage to the plate type heat exchanger. Check for any
clogging of the strainer, any air being caught, any reduction in the
flow rate due to failure of circulation pump by measuring the
temperature and pressure differences at the inlet and outlet ports
of the plate type heat exchanger. If the aged difference in the
temperature or pressure has increased beyond the proper range,
the flow rate should have decreased. Stop the operation and
remove the cause before restarting the operation.
3. Steps to be taken when a freezing protection device was activated
When the freezing protection device should be activated during
operation, remove the cause without fail before restarting the
operation. If the freezing protection device has been once
activated, a partial freezing has occurred. If you restart the operation without removing the cause, the plate type heat exchanger will
be closed and the ice cannot be melted, and in addition, the
freezing process will be repeated resulting in any damage to the
plate type heat exchanger, leading to any such accidents that the
refrigerant starts leaking or water starts entering the refrigerant
circuit.
7-4 Water quality
Cooling water system (3)
Hot water system (2)
Tendency (1)
Circulation system
Circulation
Circulation Make-up
Make-up
water
water
water (68°F ~ 140°F) water Corrosion Scale
Standard items
6.5 to 8.2 6.0 to 8.0 7.0 to 8.0 7.0 to 8.0
{
{
Electrical Conductivity Less than Less than Less than Less than
(mS/ft)(77°F)
24.4
9.1
9.1
9.1
{
{
Chloride ions
(mgcl–/L)
Less than Less than Less than Less than
200
50
50
50
{
Sulfate ions
(mgSO42- /L)
Less than Less than Less than Less than
200
50
50
50
{
pH (77°F)
Acid consumption
Less than Less than Less than Less than
(pH4.8) (mgCaCO3/L)
100
50
50
50
{
Total hardness
(mgCaCO3/L)
Less than Less than Less than Less than
200
70
70
70
{
Calcium hardness
(mgCaCO3/L)
Less than Less than Less than Less than
150
50
50
50
{
Ionic-state silica
(mgSiO2/L)
Less than Less than Less than Less than
50
30
30
30
{
Reference items
Iron (mgFe/L)
Less than Less than Less than Less than
1.0
0.3
1.0
0.3
{
Copper (mgCu/L)
Less than Less than Less than Less than
0.3
0.1
1.0
0.1
{
Sulfate ion
(mgS 2- /L)
Shall not
Shall not
Shall not
Shall not
be detected be detected be detected be detected
{
Ammonium ion
+
(mgNH4 /L)
Less than Less than Less than Less than
1.0
0.1
0.3
0.1
{
Residual chlorine
(mgCl/L)
Less than Less than Less than Less than
0.3
0.3
0.25
0.3
{
Free carbon dioxide Less than Less than Less than Less than
(mgCO2/L)
4.0
4.0
0.4
4.0
{
Stability index
{
6.0 to 7.0
7-5 Maintenance of plate type heat exchanger
The performance of a plate type heat exchanger may decline due to
scale accumulation. It may be damaged by freezing due to the drop of
flow rate. For this reason, it is necessary to carry out programmed
maintenances at a regular interval in order to prevent the scale from
being generated.
1. Before entering the season for use, carry out the following
inspections:
Water quality standards for chilled water, hot water and make-up
water (4) (6)
Item (5)
[NOTES]
(1) The circle marks in the columns for corrosion or scale to develop.
(2) Corrosion has a tendency to occur when water temperature is high
(104 °F or more), and if metals with no protective coating whatever
are directly exposed to water, it would be a good idea to take effective measures against corrosion such as adding a corrosion
inhibitor or deaeration treatment.
(3) In a condenser water circuit that uses a closed cooling tower, the
closed circuit circulating water and make-up water must satisfy its
water quality standards for the hot water system, and passing
water and make-up water must satisfy those for the circulation type
cooling water system.
(4) The supply water must be clean tap water, industrial water or clean
underground water.
Do not use purified or softened water.
(5) The fifteen items in the table above represent typical causes of
corrosion and scale.
(6) Once through water may cause corrosion.
Do not use once through water.
—
Installation of Outdoor Units
—
—
{
{
1) Conduct a water quality test and make sure that it is within the
standard.
2) Clean the strainer.
3) Make sure that the flow rate is correct.
4) Make sure that the operational conditions (pressure, flow rate,
outlet temperature, etc.) are normal.
2. Because the plate type heat exchanger has a structure which does
not permit disassembling and cleaning, follow the following procedures for cleaning:
1) For maintenance purposes it is required to provide for a connection port on the water inlet and on the water outlet. You must
connect a circulation pump in between these 2 connection ports
when cleaning the plate heat exchanger with chemicals.
For cleaning the scale in the plate heat exchanger it is recommended to use a solution with 5% diluted formic, citric, oxalic,
acetic or phosphoric acid.
Never use hydrochloric, sulfuric or nitric acid because such
solutions have a strong corrosive feature.
2) Make sure to provide for a stop valve in front of that inlet water
pipe connection port and for a stop valve after the outlet water
pipe connection port.
3) Connect the piping for circulation of cleaning chemicals to the
inlet and outlet piping of plate type heat exchanger. Fill the
cleaning solution of 122 - 144 °F for a while in the plate type
heat exchanger. Then, circulate the cleaning solution by a
pump for 2-5 hours.
The time for cleaning depends on the temperature of cleaning
solution or the degree of scale accumulation. Therefore, please
watch the change of the dirtiness (color) of cleaning solution to
determine the level of removal of scale.
4) After circulating the cleaning solution, discharge the solution
from the plate type heat exchanger, fill the heat exchanger with
a solution of 1-2% sodium hydroxide (NaOH) or sodium
bicarbonate (NaHCO3). Circulate this solution for 15-20
minutes for neutralization purpose.
5) After the process of neutralization has been completed, rinse
the inner part of the plate type heat exchanger with care using
fresh and clean water.
6) When using any cleaning agent sold in the market, check in
advance that such agent has no corrosive features against
stainless steel and copper.
7) For details of cleaning method, ask the manufacturer of related
cleaning agent.
3. After cleaning has been completed, make sure that the unit can be
operated in a normal fashion.
37
Installation
8.
EDUS30-607-N
FIELD WIRING
NOTE
All field wiring and components must be installed by a licensed
electrician and must comply with relevant local and national
regulations.
The field wiring must be carried out in accordance with the wiring
diagrams and the instructions given below.
Be sure to use a dedicated power circuit. Never use a power
supply shared by another appliance.
Do not operate until refrigerant piping work is completed.
(If operated before complete the piping work, the compressor
may be broken down.)
Never remove thermistor, sensor or etc. when connecting power
wiring and transmission wiring.
(If operated with thermistor, sensor or etc. removed, the
compressor may be broken down.)
Be sure to install a ground fault circuit interrupter.
(This unit uses an inverter, so install a ground fault circuit
interrupter that be capable of handling high harmonics in order to
prevent malfunctioning of a ground fault circuit interrupter itself.)
This product have reversed phase protection detector only works
when the product started up.
Replace two of the three phases (L1, L2, and L3) during reversephase protection circuit operation.
Reversed phase detection is not performed while the product is
operating.
Do not run the unit by short cutting the protection device (S1PH).
If there exists the possibility of reversed phase, lose phase,
momentary black out or the power goes on and off while the product is operating, attach a reversed phase protection circuit locally.
Running the product in reversed phase may break the
compressor and other parts.
Attach the power wire securely.
8-1 Optional parts
COOL/HEAT Selector
S1S .............................. Selector switch (fan, cool/heat)
S2S .............................. Selector switch (cool/heat)
NOTE
• Use copper conductors only.
• When using the adaptor for sequential start, refer to chapter
“Examples”.
• For connection wiring to outdoor-outdoor transmission F1-F2, outdoor-indoor transmission F1-F2, refer to chapter “Examples”.
• For connection wiring to the central remote controller, refer to the
installation manual of the central remote controller.
• Use insulated wire for the power cord.
8-2 Power circuit and cable requirements
A power circuit (see table below) must be provided for connection of
the unit. This circuit must be protected with the required safety
devices, i.e. a main switch, a slow blow fuse on each phase and a
ground fault circuit interrupter.
Phase and
frequency
Voltage
Minimum Recommended Transmission
circuit amp.
fuses
line selection
RWEYQ60/72/84MTJU φ 3, 60 Hz
208-230V
22.4A
40A
AWG18-16
RWEYQ144/168MTJU
φ 3, 60 Hz
208-230V
44.8A
40+40A
AWG18-16
RWEYQ216/252MTJU
φ 3, 60 Hz
208-230V
67.1A
40+40+40A
AWG18-16
NOTE
• Select the power supply cable in accordance with relevant local
and national regulations.
• Wire size must comply with the applicable local and national code.
• Specifications for local wiring power cord and branch wiring are in
compliance with local cord.
8-3 General
• As this unit is equipped with an inverter, installing a phase
advancing capacitor will not only reduce the power factor
improvement effect, but also may cause the capacitor to overheat
due to high-frequency waves. Therefore, never install a phase
advancing capacitor.
• Keep power imbalance within 2% of the supply rating.
1. Large imbalance will shorten the life of the smoothing
capacitor.
2. As a protective measure, the product will stop operating and an
error indication will be made, when power imbalance exceeds
4% of the supply rating.
• Follow the “electrical wiring diagram” when carrying out any
electrical wiring.
• Only proceed with wiring work after blocking off all power.
• Always ground wires. (In accordance with national regulations of
the pertinent country.)
• This unit uses an inverter, and therefore generates noise, which
will have to be reduced to avoid interfering with other devices. The
outer casing of the product may take on an electrical charge due to
leaked electrical current, which will have to be discharged with the
grounding.
• This unit has a negative phase protection circuit. (If it operates,
only operate the unit after correcting the wiring.)
DANGER
• Do not ground units to gas pipes, sewage pipes, lightning rods,
or telephone ground wires because incomplete grounding could
cause a severe shock hazard resulting in severe injury or death.
Gas pipes: can explode or catch fire if there is a gas leak.
Sewage pipes: no grounding effect is possible if hard plastic
piping is used.
Telephone ground wires and lightning rods: dangerous
when struck by lightning due to abnormal rise in electrical
potential in the grounding.
8-4 Examples
System example (Refer to figure 8)
1. Field power supply
2. Main switch
3. Disconnect switch
4. Fuse
5. Ground fault circuit interrupter
6. Remote controller
7. Outside unit
8. BS unit
9. Indoor unit
10. Cool / heat selector
power supply wiring (sheathed cable)
transmission wiring (sheathed cable)
CAUTION
• Use a power wire pipe for the power wiring.
• Outside the unit, make sure the low-voltage electric wiring (i.e. for the
remote controller, transmission, etc.) and the high-voltage electric
wiring do not pass near each other, keeping them at least 5 in. apart.
Proximity may cause electrical interference, malfunctions, and
breakage.
• Be sure to connect the power wiring to the power wiring terminal
block and secure it as described in 8-4 Field line connection.
• Transmission wiring should be secured as described in 8-4 Field
line connection.
• Secure the wiring with the accessory clamps so that it does not
touch the piping.
• Make sure the wiring and the electric parts box lid do not stick up
above the structure, and close the cover firmly.
WARNING
• Never connect power supply wiring to the terminal block for remote
controller wiring as this could damage the entire system.
Picking power line and transmission line
(Refer to figure 9)
1. Power supply wiring and wiring for pump operation
(High voltage)
2. Connection wiring
(Low voltage)
3. Set apart
• Make sure to connect the power source wire to the power source
terminal block and to clamp it as shown in figure 8, chapter “Field
line connection”.
38
Installation of Outdoor Units
EDUS30-607-N
Installation
Connect the wire to the terminal block on PC board with care
since too much pressure may cause breakage of the PC board.
Field line connection: transmission wiring, interlock circuit,
pump operation output and COOL/HEAT selector
Power and transmission line: Connect it using conduit mounting
plates.
Conduit
(field supply)
Top plate
Top plate
Conduit
mounting
plate
(accessory)
Lock nut
(field supply)
[In case of one outside unit]
(Refer to figure 10)
1. COOL/HEAT selector
2. Outside unit PC board (A1P)
3. Take care of the polarity
4. Use the conductor of sheathed wire (2 wire)(no polarity)
5. Terminal board (field supply)
6. Indoor unit
7. Never connect the power wire.
8. BS unit A
9. BS unit B
10. Last BS unit
11. Cool-only unit
[In case of multiple outside units]
(Refer to figure 11)
1. Unit A (Master unit)
2. Unit B
3. Unit C
4. TO IN/D UNIT
5. TO OUT/D UNIT
6. TO MULTI UNIT
7. To COOL/HEAT selector (only Heat pump system)
8. To indoor unit
9. To other systems
• The transmission wiring between the outside units in the same
pipe line must be connected to the Q1/Q2 (Out Multi) terminals.
Connecting the wires to the (Out-Out) terminals results in system
malfunction.
• The wiring for the other lines must be connected to the F1/F2 (OutOut) terminals of the PC board in the outside unit to which the
transmission wiring for the indoor units is connected.
• The outside unit to which the transmission wiring for the indoor
units is connected is master unit.
• The transmission wiring between the outside units must be 100 ft.
in length at maximum.
NOTE
• Be sure to keep the power line and transmission line apart from
each other.
Be careful about polarity of the transmission line.
Make sure that the transmission line is clamped as shown in the
figure in chapter “Field line connection”.
Check that wiring lines do not make contact with refrigerant
piping.
Firmly close the lid and arrange the electric wires so as to
prevent the lid or other parts from coming loose.
[Setting the interlock circuit and pump operation output.]
〈Pump operation output [high voltage]〉
• Use insulated wires of the size as mentioned below having rated
voltage of 250 V or more:
For single core: AWG16 or larger (conduit pipe work)
For multiple cores: AWG18 or larger
*The wiring for pump operation output is to be procured locally.
(Refer to figure 12)
1. Pump operation output terminal (X2M).
When water pump is linked with system operation, water
pump operation circuit shall be set between terminals (1)
and (2).
Contact specification --- 220 VAC, 3mA-0.5A
Installation of Outdoor Units
2. PC board (A1P)
3. Mount an insulation sleeve.
4. Connection of interlock circuit
Do not forget to connect an interlock circuit (an auxiliary
a-contact of electromagnetic switch for the water pump)
to each outside unit.
(Select without fail an auxiliary a-contact able to switch
minimum load of DC15V, 1mA.)
〈When connecting for each outside unit〉
Connect to the terminal block (X3M) as shown in the
bottom right of the sketch.
〈When connecting multiple outside units as 1 single unit
(centralized interlock)〉
For this unit, it is possible to make a centralized interlock
of multiple outside units using an adapter (sold separately
as an accessory) for external control of outside units.
For details of wiring connection, refer to “How to centralized interlock wiring”.
〈How to the centralized interlock wiring〉
• When centralized interlock is done, see “8-5 In case of a local
setting” -(3)
• No wiring to terminal block X3M is necessary when centralized
interlock is employed
• For multiple outside units, external/external connection wiring shall
be done for master unit only.
(Refer to figure 13)
1. Outside unit A
2. Outside unit B
3. Outside unit C
4. Adapter for external control
5. Interlock circuit of water pump
6. Out-Out connection wiring
7. Use the conductor of sheathed wire (2 wire)(no polarity)
[Setting the cool/heat operation type]
1. Performing cool/heat setting with the remote controller connected to the indoor unit.
Keep the COOL/HEAT selector switch (DS1) on the outside
unit PC board (A1P) at the factory setting position OFF.
(Refer to figure 16)
1. Remote controller
2. Performing cool/heat setting with the COOL/HEAT selector.
Connect the COOL/HEAT selector (optional) to the A/B/C
terminals and set the COOL/HEAT selector switch (DS1) on
the outside unit PC board (A1P) to ON.
(Refer to figure 17)
1. COOL/HEAT selector
• The wiring from the indoor units must be connected to the F1/F2
(In-Out) terminals on the PC board in the outdoor unit.
• For the above wiring, always use sheathed vinyl cords with
AWG18-16 sheath or cables (2 core wires). (3 core wire are
allowable for the COOL/HEAT selector only.)
NOTE
• All transmission wire is field supply.
• Be sure to follow the limits below. If the transmission wiring is beyond these limits, it may result in malfunction of transmission.
Maximum wiring length:
3280 ft.
Total wiring length:
6560 ft.
Max. branches No. of branches: 16
Wire length between outside units: 98 ft
Up to 16 branches are possible for transmission wiring. No
branching is allowed after branching.
Never connect the power supply to transmission wiring terminal
block. Otherwise the entire system may break down.
(Refer to figure 14)
1. Branch
2. Subbranching
For low-noise operation, it is necessary to get the optional “External control adaptor for outdoor unit”.
For details, see the installation manual attached to the adaptor.
39
Installation
EDUS30-607-N
Field line connection:
L1, L2, L3, phase of the power supply wiring should be clamped to the
safety catch using the included clamp material.
The green and yellow striped wrapped wires should be used for
grounding.
Make sure to connect the power wire to the power terminal block and
fix it using attached clamp as shown in figure 15 and 19.
(Refer to figure 15)
1. Power supply
(208-230V, Three-phase)
2. Branch switch, overcurrent breaker
3. Grounding wire
4. Ground fault circuit interrupter
5. Attach insulation sleeves.
6. Power supply terminal block
7. Grounding terminal
8. Retain the ground wires along with the power wires using
the accessory clamp (A).
9. Grounding wire
10. When wiring, do not allow the ground wires to contact the
compressor lead wires. If the wires contact each other,
adverse effects may occur to other units.
11. When connecting two wires to one terminal, ensure that
the crimp-style terminals face with each other back to
back.
Moreover, make sure that the wire of the smaller gauge is
located above.
12. Terminal block
13. Crimp-style terminal
14. Wire gauge: Small
15. Wire gauge: Large
(Refer to figure 19)
1. Intake for power supply wiring, pump operation output
(high voltage) and ground wiring.
2. Stop valve for discharge gas (high temperature part)
3. Insert the accessory clamp (B) in the hole of the fixing
plate for stop valve.
4. Power supply wiring, pump operation output (high
voltage) and ground wiring.
5. Retain the power supply wiring, pump operation output
(high voltage) and ground wiring with the accessory
clamp (B) to prevent them from touching with the stop
valve for discharge gas.
6. Insert the accessory clamp (B) in the hole of the bottom of
electrical box.
7. Intake for transmission wiring. (low voltage)
8. Make sure to provide for a downward loop in the transmission wiring right in front of the location where the wiring is
to be fixed over the top plate of the switch box. This in
order to prevent that condensate drips off the wiring into
the switch box.
9. Fix the transmission wiring to resin clamps with the
accessory clamps (A)
10. Pass the transmission wiring (low voltage) through the
wire clip.
11. Retain the power supply wiring, pump operation output
(high voltage) and ground wiring to the bottom of
electrical box with the accessory clamp (B)
WARNING
• Use only specified wire and connect wires to terminals tightly. Be
careful that wires do not place external stress on terminals. Keep
wires in neat order so as not to obstruct other equipment. Incomplete connections could result in overheating, and in worse
cases, electric shock or fire.
CAUTION
〈Precautions when laying power wiring〉
Use round pressure terminals for connections to the power
terminal block.
Round pressure
terminal
Power wire
When none is available, follow the instructions below.
• Do not connect wiring of different thicknesses to the power
terminal block. (Slack in the power wiring may cause abnormal
heat.)
• When connecting wiring which is the same thickness, do as
shown in the figure below.
Connect samethickness wiring
to both sides.
It is forbidden to
connect two to
one side.
It is forbidden to
connect wiring of
different thicknesses.
•
For wiring, use the designated power wire and connect firmly,
then secure to prevent outside pressure being exerted on the
terminal board.
• Use an appropriate screwdriver for tightening the terminal
screws. A screwdriver with a small head will strip the head and
make proper tightening impossible.
• Over-tightening the terminal screws may break them.
• See the table below for tightening torque for the terminal
screws.
Tightening torque
(ft · lbf)
M5 (Power terminal block)
2.21-3.02
M5 (Ground)
M3 (Transmission wiring terminal block)
0.59-0.72
〈Precautions when connecting the ground〉
When pulling the ground wire out, wire it so that it comes through
the cut out section of the cup washer. (An improper ground
connection may prevent a good ground from being achieved.)
Cup washer
Round pressure terminal
Cut out section
8-5 In case of a local setting
If necessary, do the local settings as mentioned in the table below. For
setting, refer to the plate “Cares to be taken in servicing” attached to
the cover of electrical parts box.
Typical local settings
* For other settings than mentioned in the table below, refer to the
equipment design materials and service manual.
(1) Setting of switching between
cooling and heating
This setting is done when switching between cooling and
heating is performed by a switching remote controller (sold
separately as an accessory) installed on the outside unit.
(2) Setting to prohibit sequenced This setting is done when the outside units are not started
in a sequenced order.
start
settings are done when the interlocks are
(3) Setting of centralized interlock These
connected in a lump-sum manner or when performing a
Setting of external demand
demand operation by external instruction.
This setting is done when making an abnormal display
(4) Setting of abnormal display
on a remote controller when the interlock contact is
when interlock contact is OFF (HJ)
OFF (when the heat source water pump is not operated).
CAUTION
A separate adapter (sold separately as an accessory) for
external control of an outside unit is necessary when doing a
demand operation from an external instruction, setting of cooling
and heating through a centralized remote controller for cooling
and heating (sold separately as an accessory) and setting of
centralized interlock. For details, refer to the pamphlet attached
to the adapter.
40
Installation of Outdoor Units
EDUS30-607-N
9.
REFRIGERANT PIPING
CAUTION
After completing installation, be sure to open the valves.
(See 9-9 Additional refrigerant charge for details) (Operating
the unit with the valves shut will break the compressor.)
Use R-410A to add refrigerant. (The R-410A refrigerant cylinder
has a pink stripe painted around it.)
All field piping must be installed by a licensed refrigeration technician
and must comply with relevant local and national regulations.
CAUTION TO BE TAKEN WHEN BRAZING REFRIGERANT PIPING
Do not use flux when brazing copper-to copper refrigerant piping.
(Particularly for the HFC refrigerant piping) Therefore, use the
phosphor copper brazing filler metal (BCuP-2: JIS Z 3264/BCu93P-710/795: ISO 3677) which does not require flux.
(Flux has an extremely negative effect on refrigerant piping systems. For instance, if the chlorine based flux is used, it will cause
pipe corrosion or, in particular, if the flux contains fluorine, it will
damage the refrigerant oil.)
NOTE
• Installation tools:
Gauge manifold, charge hose, etc.
Make sure to use installation tools that are exclusively used for
R-410A installations to withstand the pressure and to prevent
foreign materials (e.g. mineral oils such as SUNISO and
moisture) from mixing into the system.
(The screw specifications differ for R-410A and R-407C.)
Vacuum pump
1. Use a 2-stage vacuum pump with a non-return valve.
2. Make sure the pump oil does not flow oppositely into the
system while the pump is not working.
3. Use a vacuum pump which can evacuate to –14.6 psi.
9-1 Selection of piping material
1. Foreign materials inside pipes (including oils for fabrication) must
be 9 mg/10 ft or less.
2. Use the following material specification for refrigerant piping:
•
3.
4.
5.
6.
7.
Construction material: Phosphoric acid deoxidized seamless
copper for refrigerant.
• Size: Determine the proper size referring to chapter “Example
of connection”.
• The wall thickness of the refrigerant piping should comply with
relevant local and national regulations. For R-410A the design
pressure is 550 psi.
Make sure to use the particular branches of piping that have been
selected referring to chapter “Example of connection”.
Refer to chapter “Stop valve operation procedure” in 9-10 about
the shutoff valve operation procedure.
Make sure to perform the piping installation within the range of the
maximum allowable pipe length, allowable level difference and
allowable length after branching as indicated in chapter “Example
of connection”
For installation of the refrigerant branching kit, refer to the
installation manual delivered with the kit.
And follow the conditions listed below.
• Mount the REFNET joint so that it branches either horizontally
or vertically.
• Mount the REFNET header so that it branches horizontally.
(Refer to figure 22)
1. Horizontal connections
2. Up to ± 30° or vertically
3. Horizontal connections
To connect the piping between outside units, an optional piping kit
(multi connection piping kit) is always required. When installing the
piping, follow the instructions in the installation manual that comes
with the kit.
Restriction for the installation of the outside unit multi
connection piping kit
• Install the joint horizontally within a lean of ±15° with caution
nameplate on top. Refer to figure 23 (Fig. A)
Do not connect it vertically. Refer to figure 23 (Fig. B)
• Reserve the straight part of 19-11/16 in. or more to the branch pipe
and do not bend the local pipe in that area.Straight part of 19-11/16
in. or more can be reserved if a local pipe (straight pipe) of 4-3/4 in.
or more is connected to the joint. Refer to figure 23 (Fig. C)
Installation of Outdoor Units
Installation
• Incorrect installation may cause breakage of outside unit.
(Refer to figure 23)
1. Caution nameplate
2. Horizontal line
3. Ground
4. Straight part of 19-11/16 in. or more
5. Local pipe
(4-3/4 in. length or more)
Precautions when selecting branch piping.
• If the overall equivalent length of piping between the outside units
and indoor units is 262.5 ft or more, be sure to enlarge the main
pipe in the liquid-side branch piping.
Depending on the length of the refrigerant piping, the cooling/heating capacity may drop, but even in such cases it is ok to enlarge the
main pipe.
(Refer to figure 21)
1. Outside unit
2. Main pipe
3. Enlarge
4. The first refrigerant branching kit.
5. Indoor unit
[Liquid side]
RWEYQ60/72/84MTJU type: ........................ φ3/8” → φ1/2”
RWEYQ144MTJU type: ................................. φ1/2” → φ5/8”
RWEYQ168/216MTJU type: .......................... φ5/8” → φ3/4”
RWEYQ252MTJU type: ................................. φ3/4” → φ7/8”
9-2 Protection against contamination when
installing pipes
•
Take measures to prevent foreign materials like moisture and
contamination from mixing into the system.
Place
Installation period
Protection method
More than a month
Pinch the pipe
Outdoor
Less than a month
Pinch or tape the pipe
Indoor
Regardless of the period
• Great caution is needed when passing copper tubes through
walls.
9-3 Pipe connection
•
•
•
Only use the flare nuts included with the unit.
Using different flare nuts may cause the refrigerant to leak.
Be sure to perform a nitrogen blow when brazing.
(Brazing without performing nitrogen replacement or releasing
nitrogen into the piping will create large quantities of oxidized
film on the inside of the pipes, adversely affecting valves and
compressors in the refrigerating system and preventing normal
operation.)
Do not use a flux when brazing the refrigerant pipe joints.
Use phosphor copper brazing (B-Cu93P-710/795: ISO 3677)
which does not require flux.
(Flux has an extremely negative effect on refrigerant piping systems. For instance, if chlorine based flux is used, it will cause
pipe corrosion. If the flux contains fluorine, it will damage the
refrigerant oil.)
DANGER
• Use of oxygen could cause an explosion resulting in severe injury
or death. Only use nitrogen gas.
• Refrigerant gas may produce toxic gas if it comes in contact with
fire such as from a fan heater, stove or cooking device. Exposure
to this gas could cause severe injury or death.
NOTE
• The pressure regulator for the nitrogen released when doing the
brazing should be set to 2.9 psi or less.
(Refer to figure 18)
1. Refrigerant piping
2. Location to be brazed
3. Nitrogen
4. Taping
5. Manual valve
6. Regulator
41
Installation
EDUS30-607-N
Precautions when connecting pipes
• See the following table for flare part machining dimensions.
• When connecting the flare nuts, apply refrigerant oil to the inside
and outside of the flares and turn them three or four times at first.
(Use ester oil or ether oil.)
• See the following table for tightening torque.
(Applying too much torque may cause the flares to crack.)
• After all the piping has been connected, check the gas leak with
nitrogen.
pipe size
(in.)
tightening torque
(ft. · lbf)
A
(in.)
φ 3/8”
24.1 - 29.4
0.504 - 0.520
φ 1/2”
36.5 - 44.5
0.638 - 0.654
φ 5/8”
flare shape
90˚±2
45
A
Precautions for installation of units
NOTE
• The outside unit multi connection piping kit that is sold separately
as an option (BHFP22MA56U + 84U, BHFP26MA56U + 84U) is
necessary for the multi installation of outside units.
• See the installation manual attached to the kit with attention to
installation restrictions described in “connecting the refrigerant
piping” when installing.
〈Cautions for installation of multiple outdoor units〉
1. The piping between the outdoor units must be routed level or
slightly upward to avoid the risk of oil detention to the piping side.
˚±2
Pattern 1
Piping between outside units
R=0.016~0.031
45.6 - 55.6
to indoor
unit
0.760 - 0.776
Not recommendable but in case of emergency
You must use a torque wrench but if you are obliged to install the unit
without a torque wrench, you may follow the installation method mentioned below.
After the work is finished, make sure to check that there is no gas
leak.
Pattern 2
to indoor
unit
When you keep on tightening the flare nut with a spanner, there is a
point where the tightening torque suddenly increases. From that position, further tighten the flare nut the angle shown below:
(Unit: in.)
Pipe size
Further tightening angle
Recommended arm length of tool
φ 3/8”
60 to 90 degrees
Approx. 7-7/8
φ 1/2”
30 to 60 degrees
Approx. 9-13/16
φ 5/8”
30 to 60 degrees
Approx. 11-13/16
φ 3/4”
20 to 35 degrees
Approx. 17-3/4
Change to pattern 1 or pattern 2
Prohibited pattern
Downward
inclination
to indoor
unit
Oil remains in piping
Downward
inclination
9-4 Connecting the refrigerant piping
Connect piping to outside unit by using accessory pipes
(Refer to figure 20)
1. Gas side piping
2. (field supply)
3. Gas side accessory pipe (for suction gas (1))
4. Liquid side pipe (field supply)
5. Flare nut (Included in the unit)
6. Accessory pipes (for discharge gas and suction gas (2))
is not used.
7. Piping on discharge gas side (field supply)
8. Piping on suction gas side (field supply)
9. Cut off the hatched area and use it as a cover for the
drilled.
10. Hatched area
11. Accessory pipe (for discharge gas)
12. Accessory pipe (for suction gas)
13. Guideline for pipe machining
14. Accessory pipe (for suction gas (2))
15. Brazing
16. Accessory pipe (for suction gas (1))
17. Before fitting to the product, apply brazing.
2. The gas piping (both discharge and suction gas pipings in case of
the heat recovery system) after branched, install without fail a trap
of 8 in. or more using the piping included in the piping kit for connecting the outside unit. Otherwise, the refrigerant may stay within
the piping, causing any damage to the outside unit.
8 in. or more
Prohibited pattern
No trap has been installed in the gas piping.
to indoor unit
NOTE
• Be sure to use the attached pipe when carrying out piping work
in the field.
★Oil may remain in the farthest outside unit.
Change to pattern 1 or pattern 2
• Be sure that the local piping does not touch other pipes, the
bottom panel or side panel. Especially for the bottom and side
connection, be sure to protect the local piping with the provided
insulation, to prevent it from coming into contact with the casing.
42
Installation of Outdoor Units
EDUS30-607-N
Installation
3. If the piping length between the outside unit connecting pipe kit or
between the outside units exceeds 80 in., create a rise of 8 in. or
more in the gas line within a length of 80 in. from the kit.
If 80 in. or less Piping between outside unit
80 in. or less
to indoor
unit
If 80 in. or more
to indoor
unit
Installation of Outdoor Units
80 in. or less
Rising height:
8 in. or more
43
Branch with REFNET joint
Example of connection
Example 1
(Connection of 8 indoor units Heat pump system)
(3-tube piping)
Outside Discharge gas piping
unit side Suction gas piping
Liquid piping
(2-tube piping)
Gas piping
BS
unit
Indoor
unit side
Liquid piping
One outside
unit installed
(RWEYQ60~84)
(Thick line): 3-tube piping
f
(Thin line): 2-tube piping
[∗]
If the system capacity is RWEYQ144 or more,
re-read the [outside unit] as [the first outside branch
seen from the indoor unit side].
Between outside (∗)
and indoor units
Allowable
height
length
Between outside and indoor units
Between indoor and indoor units
Between outside and outside units
Allowable length after the branch
h
j
2
1
3
o
4
B4
6
s
c
Outside unit
7 H2
c
B
g
i
B1
F
First outside h 1
branch
k
G
j
l
B2
m
2
D
n
Example 5
Actual pipe length
Difference in height
Difference in height
Difference in height
Actual pipe length
Refrigerant branch kit selection
Refrigerant branch kits can only be
used with R-410A.
Example of downstream indoor units
Pipe size selection
For an outside unit multi installation (RWEYQ144, 168, 216, 252 type),
make the settings in accordance with the following figure.
Piping between outside unit and refrigerant branch kit (part A)
Piping between outside branches (part B)
Piping between outside branch and outside unit (part C)
o
B4
Additional referigerant to be charged R (lbs)
(R should be rounded off in units of 0.1 lbs.)
NOTE:
If a negative result is gotten for R from the formula at right,
no refrigerant needs to be added.
m
q
5
d
7 H2
8
u
H1
r
Heat recovery
system ( 1 - 6 )
g
e
B1
6
B1
8
B2
1
2
k
B4
j
3
4
t
s
5
l
8
6
h
B4
B5
i
l
B6
k
4
5
6
o
n
m
H2
H1
Heat recovery system
( 1 - 6 )
3
a
7
8
REFNET header
b
Indoor units
( 1 - 8 )
H1
Heat recovery system
( 1 - 4 , 7 · 8 )
Outside unit
Cooling only
( 7 · 8 )
Example 6
H2
7
REFNET joint (A·B)
B3
g
2
j
BS units
( B1 - B5 )
p
o
B2
Outside unit
BS units Indoor units
( B1 - B6 ) ( 1 - 8 )
Cooling only
( 5 · 6 )
REFNET header
i
B3
h
f
H2
f
e
1
7
6
B5 n
d
c
o
B
c
s
5
l
Heat recovery system
( 1 - 4 , 7 · 8 )
b
r
k
j
A
B1
1
B2
f B3 h B4
i
j
B5
g
2
3
4
B6
5
6
BS units
( B1 - B6 )
Indoor units
( 1 - 8 )
l
m
k
n
7 H2
o
8
Outside
unit
Cooling only
( 5 · 6 )
H3
d
e
c
Cooling only
( 7 · 8 )
H1
H3
Heat recovery
system ( 1 - 6 )
Cooling only
( 7 · 8 )
Pipe length between outside (∗2) and indoor units ≤ 390 ft
(Example 1,4) unit 8 : a + b + c + d + e + s ≤ 390 ft
(Example 3,6) unit 8 : a + o ≤ 390 ft
(Example 2,5) unit 6 : a + b + l ≤ 390 ft, 8 : a + m + n + p ≤ 390 ft
Equivalent pipe length between outside (∗2) and indoor units ≤ 459 ft (assume equivalent pipe length of REFNET joint to be 1.6 ft, that of REFNET header to be 3.3 ft, BSVQ100(36),160(60) is 13.1 ft
Total piping length from outside unit (∗2) to all indoor units ≤ 980 ft
u
t
Piping length from outside branch to outside unit ≤ 33 ft Equivalent length: max 43 ft
r ≤ 33 ft (Equivalent length ≤ 43 ft)
s
r
u+s ≤ 33 ft (Equivalent length ≤ 43 ft)
Difference in height between outside and indoor units (H1) ≤164 ft (Max 130 ft if the outside unit is below)
u+t
≤ 33 ft (Equivalent length ≤ 43 ft)
Difference in height between indoor units (H2) ≤ 49 ft
Outside unit
Difference in height between outside unit (main) and outside unit (sub) (H3) ≤ 6.5 ft
Pipe length from first refrigerant branch kit (either REFNET joint or REFNET header ) to indoor unit ≤130 ft
(Example 1,4) unit 8 : b + c + d + e + s ? 130 ft
(Example 2,5) unit 6 : b + l ? 130 ft, 8 :m + n + p ≤ 130 ft
(Example 3,6) unit 8 : o ≤ 130 ft
How to select REFNET joint:
• When using REFNET joints at the first branch counted from the outside unit side.
Choose from the following table in accordance with the capacity of the outside unit.
(Example 1,2,4,5 : REFNET joint A )
Refrigerant branch kit name
Outside unit
capacity type
Heat recovery system
Heat pump system
KHRP25M33T
KHRP26M33T
RWEYQ60, 72, 84
KHRP25M72TU
KHRP26M72TU
RWEYQ144, 168
KHRP25M73TU
KHRP26M73TU
RWEYQ216, 252
How to select REFNET header
• Select suitable one from the table below according to the total capacity of indoor units to be connected to the
down stream of REFNET header.
Refrigerant branch kit name
Indoor
capacity index
In case of 3-tube piping
In case of 2-tube piping
<72
KHRP26M22H, KHRP26M33H
KHRP25M33H
KHRP26M33H
72≤x<111
KHRP25M72H
KHRP26M72H
111≤x<246
KHRP25M73HU
KHRP26M73HU
246≤
• For REFNET joints other than the first branch, select the proper branch kit model based on the total capacity index.
Refrigerant branch kit name
Indoor
capacity index
In case of 3-tube piping
In case of 2-tube piping
<72
KHRP25M22T
KHRP26M22T
72≤x<111
KHRP25M33T
KHRP26M33T
KHRP25M72TU
KHRP26M72TU
111≤x<246
KHRP25M73TU
KHRP26M73TU
246≤
How to select an outside branch kit (Needed when the outside unit type is RWEYQ144 or more.)
• Select from the table below according to the number of outside units.
(Example 1,4) In case of REFNET Joint
C
, indoor units of 5 + 6 + 7 + 8
Piping between outside unit and refrigerant branch kit (part A)
(Unit: inch)
• Match to the size of connection piping of outside unit
Piping size (outer diameter)
Capacity type
of outside unit Suction gas pipe Discharge gas pipe
Liquid pipe
RWEYQ60,72
φ 3/4
φ 5/8
φ 3/8
RWEYQ84
φ 7/8
φ 3/4
RWEYQ144
φ 1/2
φ 1-1/8
φ 7/8
RWEYQ168
φ 5/8
RWEYQ216
φ 1-3/8
φ 1-1/8
RWEYQ252
φ 3/4
Piping between outside branches (part B)
• Select the size from the following table based on the total capacity
of the outside unit to be connected to upstream
(Unit: inch)
Piping size (outer diameter)
Capacity type
of outside unit Suction gas pipe Discharge gas pipe
Liquid pipe
RWEYQ144
φ 1/2
φ 1-1/8
φ 7/8
RWEYQ168
φ 5/8
How to calculate the additional refrigerant
to be charged
4
a
H3
Equivalent length
3
Indoor units
BS units ( B1 - B5 ) ( 1 - 8 )
E
Outside unit
BS units Indoor units
( B1 - B4 ) ( 1 - 8 )
B4
p
B3
3 4
2
b
B
i
B3
h
f
1
H1
e
d
C
B2
p
B5 n
g
e
B1
d
8
Cooling only
( 7 · 8 )
Heat recovery system
( 1 - 6 )
b
f
b
REFNET header
r
q
5
REFNET header
A
H1
A
When multiple
outside units
installed
(RWEYQ144~)
p
B3
a
m
E
REFNET joint (A-G)
a
Total extension length
Between outside branch and outside unit
(In case of RWEYQ144 or more)
G
F
n
l B2
m
k
D
Branch with REFNET header
Example 3
REFNET joint (A·B)
a
e
C
Example 4
Actual pipe length
Maximum
allowable
length
i
B1
g
• Piping between BS unit and indoor unit,
d
B
Outside unit
BS units Indoor units
( B1 - B4 ) ( 1 - 8 )
Discharge gas piping
Suction gas piping
Liquid piping
Suction gas piping
Liquid piping
c
b
A
• Piping between outside unit and BS unit
Branch with REFNET joint and REFNET header
Example 2
REFNET joint (A-G)
a
R=
Total length (ft) of liquid
piping size at φ3/8
×0.036 +
(lbs/ft)
Heat pump system
BHFP26MA56U
BHFP26MA84U
BHFP22MA56U
BHFP22MA84U
(Example 3,6) In case of REFNET Header,
indoor units of 1 + 2 + 3 + 4 + 5 + 6 + 7 + 8
(Unit: inch)
Piping between outside branch and outside unit (part C)
Piping size (outer diameter)
Capacity type
of outside unit Suction gas pipe Discharge gas pipe
Liquid pipe
RWEYQ60,72
φ 3/4
φ 5/8
φ 3/8
RWEYQ84
φ 7/8
φ 3/4
Piping between refrigerant branch kit and refrigerant branch kit/BS unit
Piping between BS unit and refrigerant branching kit
• Select one from the table below according to the total capacity of indoor units to
be connected to downstream.
• For the gas piping size in case of 2-tube piping between refrigerant branching kit/BS unit
and refrigerant branching kit, select the size of suction gas piping.
• The size of connection piping should not exceed the refrigerant piping size selected
under the generic term of the system.
(Unit: inch)
Piping size increase in case of long piping
• When the equivalent length is 262.5 ft or more, it is necessary to increase
the size of the main pipe of liquid piping side.
• When the equivalent length is 262.5 ft or more, do not increase the sizes
of discharge and suction gas pipes.
(Unit: inch)
Diameter of liquid pipe (main pipe portion)
Piping size (outer diameter)
Capacity type
of outsie unit
Standard size
When increased
RWEYQ60,72,84
φ 3/8
φ 1/2
RWEYQ144
φ 1/2
φ 5/8
RWEYQ168,216
φ 5/8
φ 3/4
RWEYQ252
φ 3/4
φ 7/8
Total length (ft) of liquid ÷ ×0.114 +
(lbs/ft)
piping size at φ5/8
Corrected
Total length (ft) of liquid ×0.015
÷
(lbs/ft) + volume by
piping size at φ1/4
outside unit
System name
Total length (ft) of liquid
piping size at φ1/2
×0.074
(lbs/ft)
(Unit: lbs)
+
Heat recovery system
(Example 2,5) In case of REFNET Joint B , indoor units of 7 + 8
(Example 2,5) In case of REFNET Header, indoor units of 1 + 2 + 3 + 4 + 5 + 6
Total length (ft) of liquid ×0.168
+
piping size at φ3/4
(lbs/ft)
Total length (ft) of liquid ×0.235
(lbs/ft) +
piping size at φ7/8
Number of units
of outside unit
2 unit
3 unit
Heat recovery system
Heat pump system
1 unit (60 / 72 / 84)
6.6
4.4
2 unit multi (144 / 168)
9.9
5.5
3 unit multi (216 / 252)
13
6.6
Indoor unit connection piping size
Piping size (outer diameter)
Indoor unit
capacity type
Suction gas pipe Discharge gas pipe
Liquid pipe
<24
φ 1/2
φ 3/8
φ 1/4
24≤x<72
φ 5/8
φ 1/2
φ 3/8
72≤x<111
φ 7/8
φ 3/4
111≤x<162
φ 1/2
φ 1-1/8
162≤x<246
φ 5/8
φ 1-1/8
246≤
φ 1-1/4
φ 3/4
Piping between BS unit (refrigerant branch kit) and indoor unit
• Match to the size of the connection piping on the indoor unit.
Indoor unit connection piping size
(Unit: inch)
Piping size (outer diameter)
Indoor unit
capacity type
Gas pipe
Liquid pipe
07,09,12,18 type
φ 1/2
φ 1/4
24,30,36,48 type
φ 5/8
φ 3/8
∗ mark indicates the BS unit (BSVQ36MVJU) port and connection pipe are
different sizes. Use reducing joints included with BS unit.
Example for refrigerant branch using REFNET joint and REFNET header for RWEYQ252
(Heat recovery system) a : φ 3/4×30 ft e : φ 3/8×10 ft i : φ 1/2×10 ft m :φ 1/4×10 ft r : φ 3/8× 3 ft
If the outside unit is
b : φ?5/8×10 ft f : φ?3/8×10 ft j : φ 1/4×10 ft n : φ 1/4×10 ft s : φ 3/8× 3 ft
RWEYQ252 and the
piping lengths are as
c : φ 3/8×10 ft g : φ 1/4×10 ft k : φ 1/4×10 ft o : φ1/4×10 ft t : φ 3/8× 3 ft
at right
d : φ 3/8×10 ft h : φ 1/4×20 ft l : φ 1/4×10 ft p : φ 1/4×10 ft u : φ 5/8× 1 ft
R= 30 0.168 + 11 0.114 + 10 0.074 + 49 0.036 + 100 0.015 + 13 = 23.298
a
b+u
i
c+d+e+f+r+s+t g+h+j+k+l+m+n+o+p 23.3 (lbs)
Installation
EDUS30-607-N
9-6 Air tight test and vacuum drying
The units were checked for leaks by the manufacturer.
Confirm that the valves are firmly closed before Air tight test or vacuum
drying.
To prevent entry of any impurities and ensure sufficient pressure resistance, always use the special tools dedicated for R-410A.
• Air tight test: Make sure to use nitrogen gas.
(For the service port location, refer to the
1
“Caution” label attached on the front panel
[right] of the outside unit.)
(Refer to figure)
1. [Service precautions] Label
2. Electric parts box lid
3. [Caution] Label
2
Pressurize the liquid and gas pipes to 550 psi
3
(do not pressurize more than 550 psi). If the
pressure does not drop within 24 hours, the
system passes the test. If the pressure drops, check where the
nitrogen leaks from.
• Vacuum drying: Use a vacuum pump which can evacuate to
–14.6 psi.
1. Evacuate the system from the liquid and gas pipes by using a
vacuum pump for more than 2 hours and bring the system to
–14.6 psi or less. After keeping the system under that condition
for more than 1 hour, check if the vacuum gauge rises or not. If
it rises, the system may either contain moisture inside or have
leaks.
2. Following should be executed if there is a possibility of moisture
remaining inside the pipe (if piping work is carried out during the
raining season or over a long period of time rainwater may enter
the pipe during work).
After evacuating the system for 2 hours, pressurize the system
to 7.25 psi (vacuum break) with nitrogen gas and evacuate the
system again using the vacuum pump for 1 hour to –14.6 psi or
less (vacuum drying). If the system cannot be evacuated to
–14.6 psi within 2 hours, repeat the operation of vacuum break
and vacuum drying.
Then, after leaving the system in vacuum for 1 hour, confirm that
the vacuum gauge does not rise.
NOTE
Make sure to perform air tight test and vacuum drying using the service
ports of the stop valve shown in the table below.
One outside unit installed
Liquid line stop valve
Discharge gas line stop valve
Suction gas line stop valve
Multiple outside units installed
Liquid line stop valve
Discharge gas line stop valve
Suction gas line stop valve
Oil-equalizing line stop valve
9-7 Pipe insulation
After finishing the leak test and vacuum drying, the piping must be
insulated. Take into account the following points:
• Make sure to insulate the connection piping and refrigerant branch
kits entirely.
• Be sure to insulate the liquid-side, suction gas-side and discharge
gas-side piping for the inter-unit piping and the refrigerant branch
kits.
Not insulating them may cause leaking. (The gas piping can reach
temperatures of 250 °F. Be sure the insulation used can withstand
such temperatures.)
• If you think the humidity around the cooling piping might exceed
86 °F and RH80%, reinforce the insulation on the cooling piping (at
least 13/16” thick). Condensation might form on the surface of the
insulation.
• If there is a possibility that condensation on the stop valve might
drip down into the indoor unit through gaps in the insulation and piping because the outside unit is located higher than the indoor unit,
etc., this must be prevented by caulking the connections, etc.
47
WARNING
Be sure to insulate connection piping, as touching them can
cause burns.
9-8 Checking of device and installation conditions
Be sure to check the followings.
1. Make sure there is no faulty power wiring or loosing of a nut.
See “8. FIELD WIRING”.
2. Make sure there is no faulty transmission wiring or loosing of a nut.
See “8. FIELD WIRING”.
3. Make sure there is no faulty refrigerant piping.
See “9. REFRIGERANT PIPING”.
4. Make sure piping size is correct.
See “9-1 Selection of piping material”.
5. Make sure insulation work is done.
See “9-7 Pipe insulation”.
6. Make sure insulation resistance of main power circuit is not
deteriorated.
Using a megatester for 500V, check that the insulation resistance of
2MΩ or more is attained by applying a voltage of 500V DC between
power terminals and earth. Never use the megatester for the transmission wiring (between outside and indoor unit, outside and
COOL/HEAT selector and etc.).
Additional refrigerant charge
WARNING
• To avoid injury always use protective gloves and eye protection
when charging refrigerant.
• To avoid injury do not charge with unsuitable substances. Use
only the appropriate refrigerant.
NOTE
• Refrigerant cannot be charged until field wiring has been completed.
Refrigerant may only be charged after performing the leak test
and the vacuum drying (see above).
When charging a system, care shall be taken that its maximum
permissible charge is never exceeded, in view of the danger of
liquid hammer.
Refrigerant containers shall be opened slowly.
TO AVOID COMPRESSOR BREAKDOWN. DO NOT CHARGE THE
REFRIGERANT MORE THAN THE SPECIFED AMOUNT TO RAISE
THE CONDENSING PRESSURE.
• This outside unit is factory charged with refrigerant and depending
on pipe sizes and pipe lengths some systems require additional
charging of refrigerant.
• Determine the amount of refrigerant to be added by referring to the
table, write it down on the included “Added Refrigerant” plate and
attach it to the rear side of the front cover.
Note: refer to the example of connection for the amount to be added.
Additional refrigerant charge procedure (1)-normally
• Charge the refrigerant to the liquid pipe in its liquid state. Since
R-410A is a mixed refrigerant, its composition changes if charged in
a state of gas and normal system operation would no longer be
assured.
• Make sure to use installation tools you exclusively use on R-410A
installations to withstand the pressure and to prevent foreign materials from mixing into the system.
1. Before charging, check whether the tank has a siphon attached or not.
How to charge with the siphon tank.
Charge with the tank upright.
There is a siphon tube
inside, so there is no need
to turn the tank upside-down.
Other ways of charging with the tank.
Charge with the tank upside-down.
Installation of Outdoor Units
EDUS30-607-N
2. After the vacuum drying is finished, charge the additional
refrigerant in its liquid state through the liquid stop valve service
port. Taking into account following instructions:
• Check that gas and liquid stop valves are closed.
• Stop the compressor and charge the specified weight of
refrigerant.
(If the outside unit is not in operation and the total amount cannot
be charged, follow the Additional refrigerant charge procedure (2)
shown below.)
NOTE
• Procedures for charging additional refrigerant.
(Refer to figure 24)
1. Pressure reducing valve
2. Nitrogen
3. Refrigerant tank
4. With a siphon
5. Measuring instrument
6. Vacuum pump
7. Valve A
8. Valve B
9. Charge hose
10. Outside unit
11. Gas side
12. Liquid side
13. Discharge gas side
14. Suction gas side
15. Stop valve service port
16. To indoor unit
17. To indoor units / BS units
18. Dotted lines represent onsite piping
Additional refrigerant charge procedure (2)-by Additional
refrigerant charge operation
To learn the system settings for additional refrigerant charging, refer to
the [Service Precaution] label attached on the back of the electric box
lid in the outside unit.
1. Fully open all stop valves (valve A and valve B must be left
fully closed).
2. After ten minutes, fully close liquid line stop valve and then,
open the valve by turning 180°.
Start the additional refrigerant charge operation.
See [Service precautions] Label for detail.
If it is difficult to charge the refrigerant additionally, decrease the
water temperature or warm the refrigerant tank.
(Warm the refrigerant tank with a stupe or a warm hot water of
104 °F or less.)
3. After the system is charged with a specified amount of refrigerant,
press the RETURN button (BS3) on the PC board (A1P) in the outside unit to stop the additional refrigerant charge operation.
4. Immediately open both liquid-side and gas-side stop valve.
(If do not open the stop valve immediately, liquid seal may cause
the pipe to burst.)
Installation
3. Make sure to tighten the cap securely.
Closing stop valve
1. Remove the cap and turn the valve clockwise with the hexagon
wrench.
2. Securely tighten the valve until the shaft contacts the main body
seal.
3. Make sure to tighten the cap securely.
∗ For the tightening torque, refer to the table on the below.
Tightening torque
Stop
valve
size
Tightening torque ft.-lbf. (Turn clockwise to close)
Shaft
(valve body)
Liquid
side
3.98-4.87
Gas
side
19.9124.33
Hexagonal
wrench 4 mm
Cap
(valve lid)
Service
port
9.95-12.17
8.48-10.25
Hexagonal
26.54-32.44 8.48-10.25
wrench 10 mm
Gas side
Flare nut accessory
pipe (1)
24.1-29.4
_
_
16.22-20.65
(Refer to figure 25)
1. Service port
2. Cap
3. Hexagon hole
4. Shaft
5. The main body seal
〈Caution〉
• Do not damage the cap sealing.
• Always use a charge hose for service port connection.
• After tightening the cap, check that no refrigerant leaks are present.
• After working, securely tighten the cover of service port without fail
by specified torque.
• When loosening a flare nut, always use two wrenches in combination. When connecting the piping, always use a spanner and torque
wrench in combination to tighten the flare nut.
• When connecting a flare nut, coat the flare (inner and outer faces)
with ether oil or ester oil and hand-tighten the nut 3 to 4 turns as the
initial tightening.
• Do not forget to open the stop valve before starting operation.
(Refer to figure 26)
1. Remove the cap and turn the valve counterclockwise with
the hexagon wrenches until it stops.
2. Discharge gas side
3. Liquid side
4. Suction gas side
5. Never remove the partition flange for any reason.
6. Full close on the suction gas side
NOTE
• If the refrigerant cylinder is siphonal, set it upright while charging
additional refrigerant.
Stop valve operation procedure
CAUTION
Do not open the shutoff valve until 1-6 of “9-8 Checking of device
and installation conditions” are completed. If the stop valve is left
open without turning on power, it may cause refrigerant to buildup
in the compressor, leading to insulation degradation.
Opening stop valve
1. Remove the cap and turn the valve counterclockwise with the hexagon wrench.
2. Turn it until the shaft stops.
Do not apply excessive force to the stop valve. Doing so may break
the valve body, as the valve is not a backseat type. Always use the
special tool.
Installation of Outdoor Units
48
Installation
10. CHECKS AFTER INSTALLATION
WARNING
• Never connect power supply wiring to the terminal block for
remote controller wiring as this could damage the entire system.
• Attach the power wire securely.
• To avoid injury, always make sure that the circuit breaker on the
power supply panel of the installation is switched off before doing
any work.
After the installation, check the following before switching on the circuit
breaker:
1. The position of the switches that requires an initial setting
Make sure that switches are set according to your application
needs before turning the power supply on.
Power supply wiring and transmission wiring
Use a designated power supply and transmission wiring and make
sure that it has been carried out according to the instructions
described in this manual, the wiring diagrams and local and
national regulations.
Pipe sizes and pipe insulation
Make sure that correct pipe sizes are installed and that the
insulation work is properly executed.
Additional refrigerant charge
The amount of refrigerant to be added to the unit should be written
on the included “Additional Refrigerant” label, and attach it to the
rear side of the front cover.
Measurement of insulation in main power circuit
Using a megatester for 500V, check that the insulation resistance of
2MΩ or more is attained by applying a voltage of 500V DC between
power terminals and earth. Never use the megatester for the transmission wiring.
Installation date
Be sure to keep record of the installation date on the “Additional
Refrigerant” label.
2.
3.
4.
5.
6.
11. TEST RUN
CAUTION
After completing installation, be sure to open the valves.
(Operating the unit with the valves shut will break the compressor.)
11-1 Air discharge
• Running the heat source water pump, carry out air discharge
process until the water comes out from the air discharge hole of
local piping.
(For the operation to be done for the first time after installation, you
need to perform a checking operation.)
11-2 Before turn on the power supply
• Close the Electric parts box lid securely before turning on power.
• Make settings for outside unit PC board (A1P) after power-on and
check the LED display from inspection door that is on the Electric
parts box lid.
11-3 Check operation
When running the unit for the first time after installation, be sure to perform a test operation following these steps. (Not performing a test
operation when the unit is first installed may prevent the unit from operating properly.)
• During the operation, monitor the outdoor unit operation status and
check for any incorrect wiring.
EDUS30-607-N
(1) Check the connection of interlock
circuit
The outside unit cannot be operated if the
interlock circuit has not been connected.
(2)• As necessary, configure the
system settings onsite by using the
dip switch (DS1) on the outside unit
PC-Board (A1P) and push button
switches (BS1 to 5).
• When the system is in the multipleoutside unit configuration (Out
Multi), perform the configuration on
the parent unit. (Any settings made
on a child unit will be ignored.)
Always perform configuration after turning
ON the power. To learn the setting method,
refer to the [Service Precautions] label
attached at the position shown in the figure
on the right
(Electric box lid in outside unit).
(Remember, the actual settings you have
made must be recorded on the [Service
Precautions] label.)
After this, close the electric parts box
lid.
(3) Turn ON the power to the outside
units and indoor units.
Make sure to turn ON the power 6 hours
before starting the operation. This is necessary to warm the crankcase preliminarily by
the electric heater.
(4) Start the heat source water pump
and fill the heat source water in the
outside unit.
The outside unit cannot be operated if the
heat source water pump is not running.
(5) Make sure that the temperature of
heat source water is kept within the
operation range (60 - 100 °F).
The outside unit cannot be operated at a
temperature outside the operation range.
(6) Check the LED on the PC board (A1P) in the outside unit to see if the data transmission is performed normally.
LED display
(Default status
before delivery)
Microcomputer Page Ready/ Cooler/heater changeover
Low
Error
Bulk
Bulk
Demand
operation
Individual (parent) (child) noise
monitor
HAP
H1P H2P H3P H4P H5P H6P H7P
Multi
H8P
One outside unit installed
When multiple Master station
outside unit Sub station 1
installed (*) Sub station 2
LED display:
OFF
ON
Blinking
(*) The base (parent) unit is the outside unit to which the interconnecting wiring for the
indoor units is connected. The other outside units are child units.
(7)• Using the push button switches
(BS1 - 5) on the P-panel (A1P) of
outside unit, carry out a local setting, if necessary.
• When the system is in the multipleoutside unit configuration (Out
Multi), perform the configuration on
the parent unit. (Any settings made
on a child unit will be ignored.)
Always perform configuration after turning
ON the power. To learn the setting method,
refer to the [Service Precautions] label
attached at the position shown in the figure
on the right
(Electric box lid in outside unit).
(Remember, the actual settings you have
made must be recorded on the [Service
Precautions] label.)
(8) Check all stop valves are opened.
If some stop valve is closed, open
them.
(Refer to “9-10 Stop valve operation procedure”.)
[CAUTION]
Do not leave any stop valve closed.
Otherwise the compressor will fail.
For Heat recovery system of cooling and
heating:
Open all stop valves on the suction side,
discharge gas side and liquid side.
For cooling and heating switching operation
system:
Open the stop valves on discharge gas
side and liquid side. (Keep the stop valve
on suction side fully closed.)
(9)Perform the check operation following If you push the test run button (BS4) on the
P-panel (A1P) of the outside unit for 5 secthe instructions printed on the
[Service Precautions] label.
onds, the test run starts.
If you want to interrupt the test run, push
the RETURN button (BS3) on P-panel
(A1P) of the outside unit. The system continues residual operation for about 1 minute
(maximum 10 minutes) and then stops.
(During test run, you cannot stop it by a
command from a remote controller.)
You need to perform the above settings
on the PCB by accessing the PCB
through the inspection cover on the
switch box cover.
(Refer to figure 27)
1. Electric parts box
2. Electric parts box lid
3. Service lid
4. Inspection cover
5. [Service precaution] Label
49
Installation of Outdoor Units
EDUS30-607-N
Installation
〈Cautions for check operation〉
• If the system is started within about 12 minutes after the outdoor/
indoor units are turned ON, the compressor will not run and H2P
lights up. Before starting an operation, always verify that the LED
display shows the contents of the table in “11-3 Check operation
(6)”.
• The system may require up to 10 minutes until it can start the compressor after an operation start. This is a normal operation to equalize the refrigerant distribution.
• The check operation does not provide any means of checking the
indoor units individually. For that purpose, perform normal operation using the remote controller after the check operation.
• Check operation is not possible in other modes such as collection
mode.
• If the setting of indoor remote controller is changed before the
check operation, it may not be performed correctly and malfunction
code “UF” may be displayed.
Remote controller displays malfunction code
MalfuncInstallation error
tion code
E3
E4
The stop valve of an outF3
side unit is left closed.
F6
UF
U2
The phases of the power
U1
to the outside units are
reversed.
U1
U2
U4
UF
E3
F6
UF
U2
E4
F3
U7
UF
UF
E4
HJ
U3
Remedial action
Open the stop valve.
Check referring to the table in
“9-9 Additional refrigerant
charge”.
Exchange two of the three
phases (L1, L2, L3) to make a
positive phase connection.
Check if the power wiring for
the outside units are connected correctly.
(If the power wire is not conNo power is supplied to
nected to L2 phase, no
an outside or indoor unit
malfunction display will appear
(including phase interrupand the compressor will not
tion).
work.)
Check if the ground fault circuit
interrupter in the outside unit is
ON.
Check if the refrigerant piping
Incorrect transmission
line and the unit transmission
between units
wiring are consistent with each
other.
Recalculate the required
amount of refrigerant from the
piping length and correct the
refrigerant charge level by
Refrigerant overcharge
recovering any excessive refrigerant with a refrigerant recovery
machine.
• Check if the additional refrigerant charge has been finished correctly.
• Recalculate the required
Insufficient refrigerant
amount of refrigerant from
the piping length and add an
adequate amount of
refrigerant.
If an outside multi termiRemove the line from the
nal is connected when
outside multi terminals (Q1 and
there is one outside unit
Q2).
installed
The operation mode on
Set the operation mode on all
the remote controller was
indoor unit remote controllers to
changed before the
“cooling.”
check operation.
The heat source water is Make sure that the water pump
not circulating.
is running.
The check operation has
Perform the check operation.
not been performed.
Installation of Outdoor Units
11-4 Check of normal operation
After the check operation is completed, operate the unit normally.
(Heating is not possible if the outdoor temperature is 75 °F or higher.
Refer to the Operation manual.)
Check the below items.
• Make sure the indoor and outside units are operating normally
(If a knocking sound can be heard in the liquid compression of
the compressor, stop the unit immediately and then energize the
heater for a sufficient length of time before restarting the operation.)
• Run each indoor unit one at a time and make sure the corresponding outside unit is also running.
• Check to see if cold (or hot) air is coming out of the indoor unit.
• Press the fan direction and fan strength buttons on the indoor
unit to check if they operate properly.
NOTE
〈Cautions for normal operation check〉
• Once stopped, the compressor will not restart in about 5
minutes even if the Run/Stop button of an indoor unit in the
same system is pressed.
• When the system operation is stopped by the remote controller,
the outside units may continue operating for further 5 minutes at
maximum.
• If the system has not undergone any check operation by the test
operation button since it was first installed, an malfunction code
“U3” is displayed. In this case, perform check operation referring
to “11-3 Check operation”.
• After the test operation, when handing the unit over to the customer, make sure the electric box lid, the service lid, and the unit
casing are all attached.
12. CAUTION FOR REFRIGERANT LEAKS
DANGER
• Refrigerant gas is heavier than air and replaces oxygen. A massive leak could lead to oxygen depletion, especially in basements, and an asphyxiation hazard could occur leading to
serious injury or death.
(Points to note in connection with refrigerant leaks)
Introduction
The installer and system specialist shall secure safety against
leakage according to local regulations or standards. The following standards may be applicable if local regulations are not available.
The VRV System, like other air conditioning systems, uses R-410A as
refrigerant. R-410A itself is an entirely safe non-toxic, non-combustible
refrigerant. Nevertheless care must be taken to ensure that air conditioning facilities are installed in a room which is sufficiently large. This
assures that the maximum concentration level of refrigerant gas is not
exceeded, in the unlikely event of major leak in the system and this in
accordance to the local applicable regulations and standards.
Maximum concentration level
The maximum charge of refrigerant and the calculation of the maximum concentration of refrigerant is directly related to the humanly
occupied space in to which it could leak.
The unit of measurement of the concentration is lb./ft3 ( the weight in lb.
of the refrigerant gas in 1ft3 volume of the occupied space).
Compliance to the local applicable regulations and standards for the
maximum allowable concentration level is required.
50
Installation
EDUS30-607-N
4. Dealing with the situations where the result exceeds the maximum
1
2
concentration level.
Where the installation of a facility results in a concentration in
excess of the maximum concentration level then it will be necessary
to revise the system. Please consult your Daikin supplier.
1. direction of the refrigerant flow
2. room where refrigerant leak has occurred (outflow of all
the refrigerant from the system)
Pay a special attention to the place, such as a basement, etc.
where refrigerant can stay, since refrigerant is heavier than air.
Procedure for checking maximum concentration
Check the maximum concentration level in accordance with steps 1 to
4 below and take whatever action is necessary to comply.
1. Calculate the amount of refrigerant (lb.) charged to each system
separately.
amount of refrigerant in a single unit
system (amount of
refrigerant with
which the system
is charged before
leaving the factory)
+
additional charging
amount (amount of
refrigerant added
locally in accordance
with the length or
diameter of the refrigerant piping)
=
total amount
of refrigerant (lb.) in
the system
NOTE
• Where a single refrigerant facility is divided into 2 entirely independent refrigerant systems then use the amount of refrigerant with
which each separate system is charged.
2. Calculate the smallest room volume (ft3 )
In case like the following, calculate the volume of (A), (B) as a single
room or as the smallest room.
A. Where there are no smaller room divisions
B. Where there is a room division but there is an opening
between the rooms sufficiently large to permit a free flow of
air back and forth.
1
2
1. opening between rooms
2. partition
(Where there is an opening without a door or where there are openings above and below the door which are each equivalent in size to
0.15% or more of the floor area.)
3. Calculating the refrigerant density using the results of the calculations in steps 1 and 2 above.
total volume of refrigerant in the
refrigerant system
size (ft3 ) of smallest room in which
there is an indoor unit installed
≤
maximum concentration level (lb./ft3)
If the result of the above calculation exceeds the maximum concentration level then make similar calculations for the second then third
smallest room and so until the result falls short of the maximum
concentration.
51
Installation of Outdoor Units
EDUS 30 - 607 - N
Installation
AMERICAS
1645 Wallace Drive, Suite 110
Carrollton, TX75006
[email protected]
www.daikinac.com
Specifications, designs and other content appearing in this brochure are current as of Dec. 2006 but subject to change without notice.
This book is made of recycled paper.
EDUS30-607-N
Printed in U.S.A. 12/2006 K AK·FS
AMERICAS
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