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additional protection, with the grounding system in North 
America, a dedicated GFCI is not necessary.

Securely fasten the unit terminal cover (panel). If the terminal 
cover/panel is not installed properly, dust or water may enter 
the outdoor unit and could result in fire or electric shock.

When installing or relocating the system, keep the refrigerant 
circuit free from substances other than the specified refrigerant 
(R410A) such as air. Any presence of air or other foreign sub-
stance in the refrigerant circuit could result in abnormal pres-
sure rise or rupture, resulting in injury.

Do not change the setting of the protection devices. If the pres-
sure switch, thermal switch, or other protection device is 
shorted and operated forcibly, or parts other than those speci-
fied by Daikin are used, fire or explosion could result.

CAUTION

Do not touch the switch with wet fingers. Touching a switch 
with wet fingers may result in electric shock.

Do not allow children to play on or around the unit or it may 
result in injury.

The heat exchanger fins are sharp enough to cut, and may 
result in injury if improperly used. To avoid injury wear glove or 
cover the fins when working around them.

Do not touch the refrigerant pipes during and immediately after 
operation as the refrigerant pipes may be hot or cold, depend-
ing on the condition of the refrigerant flowing through the 
refrigerant piping, compressor, and other refrigerant cycle 
parts. It may result in your hands getting burns or frostbite if 
you touch the refrigerant pipes.
To avoid injury, give the pipes time to return to normal tempera-
ture or, if you must touch them, be sure to wear proper gloves.

Install drain piping to proper drainage. Improper drain piping 
may result in water leakage and property damage.

Insulate piping to prevent condensation.

Be careful when transporting the product.

Do not turn off the power immediately after stopping operation. 
Always wait for at least 5 minutes before turning off the power. 
Otherwise, water leakage may result.

Do not use a charging cylinder. Using a charging cylinder may 
cause the refrigerant to deteriorate.

Refrigerant R410A in the system must be kept clean, dry, and tight.
(a) Clean and Dry - Foreign materials (including mineral oils such 

as SUNISO oil or moisture) should be prevented from getting 
into the system.

(b) Tight - R410A does not contain any chlorine, does not 

destroy the ozone layer, and does not reduce the earth’s pro-
tection again harmful ultraviolet radiation.
R410A can contribute to the greenhouse effect if it is 
released. Therefore take proper measures to check for the 
tightness of the refrigerant piping installation.
Read the chapter Refrigerant Piping and follow the procedures.

Since R410A is a blend, the required additional refrigerant must 
be charged in its liquid state. If the refrigerant is charged in a 
state of gas, its composition can change and the system will 
not work properly.

The indoor unit is for R410A. See the catalog for indoor models 
that can be connected. Normal operation is not possible when 
connected to other units.

Remote controller (wireless kit) transmitting distance can be 
shorter than expected in rooms with electronic fluorescent 
lamps (inverter or rapid start types). Install the indoor unit far 
away from fluorescent lamps as much as possible.

Indoor units are for indoor installation only. Outdoor units can be 
installed either outdoors or indoors. This unit is for outdoor use.

Do not install the air conditioner or heat pump in the following 
locations:
(a) Where a mineral oil mist or oil spray or vapor is produced, 

for example, in a kitchen.

Plastic parts may deteriorate and fall off and thus may result 
in water leakage.

(b) Where corrosive gas, such as sulfurous acid gas, is pro-

duced.
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 cause the unit to malfunction.

(d) Where flammable gas may leak, where there is carbon fiber, 

or ignitable dust suspension in the air, or where volatile 
flammables such as thinner or gasoline are handled. Operat-
ing the unit in such conditions may result in a fire.

Take adequate measures to prevent the outdoor unit from being 
used as a shelter by small animals. Small animals making con-
tact with electrical parts may result in malfunctions, smoke, or 
fire. Instruct the customer to keep the area around the unit 
clean.

NOTE

Install the power supply and transmission wires for the indoor 
and outdoor units at least 3.5 ft. (1 m) away from televisions or 
radios to prevent image interference or noise.
Depending on the radio waves, a distance of 3.5 ft. (1 m) may 
not be sufficient to eliminate the noise.

Dismantling the unit, treatment of the refrigerant, oil and addi-
tional parts must be done in accordance with the relevant local, 
state, 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, or refrigerant recovery equipment.

If the conventional refrigerant and refrigerator oil are mixed in 
R410A, the refrigerant result in deterioration.

This air conditioner or heat pump is an appliance that should 
not be accessible to the general public.

As design pressure is 478 psi (3.3 MPa), the wall thickness of 
field-installed pipes should be selected in accordance with the 
relevant local, state, and national regulations.

Codes and Regulations

This product is designed and manufactured to comply with 
national codes. Installation in accordance with such codes and/or 
prevailing local codes/regulations is the responsibility of the 
installer. The manufacturer assumes no responsibility for equip-
ment installed in violation of any codes or regulations.Rated per-
formance is achieved after 72 hours of operation. 

2.

INTRODUCTION

1.

This series uses R410A  refrigerant. Be absolutely sure to comply 
with “

7. PRECAUTIONS ON REFRIGERANT PIPING

”, because 

even greater caution is needed to prevent impurities from entering 
R410A (mineral oils and water).

2.

The design pressure is 478psi (3.3MPa), which means that piping 
may be thicker than conventionally, so please refer to “

7. PRECAU-

TIONS ON REFRIGERANT PIPING

”.

3.

This is a mixed refrigerant, so charge as a liquid when adding refrig-
erant. 
(If charged as a gas, the composition of the refrigerant may change, 
preventing normal operation.)

4.

The indoor unit must use R410A. See the catalog for indoor unit 
models which can be connected. (Normal operation is not possible 
when connected to other units.)

5.

The power supply of this series is single-phase, 208/230V, 60Hz.

01_EN_3P591321-1B.fm  2 ページ  2019年12月24日 火曜日 午後5時19分

Summary of Contents for VRV IV-S Series

Page 1: ...nglish Fran ais Installation manual VRV IV S System air conditioner Manuel d installation Conditionneur d air VRV IV S System Espa ol Manual de instalaci n Acondicionador de aire con sistema VRV IV S...

Page 2: ...more 20 500 or less inch mm 40 1000 or more 40 1000 or more 20 500 or less 12 300 or more 8 200 or more 4 100 or more 4 100 or more figure 5 figure 6 1 2 3 4 20 500 or more 20 500 or less 20 500 or m...

Page 3: ...or more 8 200 or more 4 100 or more inch mm 4 100 or more 4 100 or more 4 100 or more 4 100 or more 4 100 or more 4 100 or more L H A 60 1500 or more 24 600 or more 120 3000 or more 1 13 16 20 inch m...

Page 4: ...UNIT F2 F1 F2 F1F2 F1F2 1 2 3 4 F2 F1 F2 F1 F2 F1 F2 F1 F2 F1 1 2 3 1 7 2 2 8 3 4 5 6 B A figure 18 figure 20 1 2 3 4 4 5 6 1 2 3 5 6 8 4 7 1 2 3 4 4 1 3 2 figure 21 figure 22 figure 23 figure 24 1 2...

Page 5: ...r lightning rods as incomplete grounding will result a severe shock hazard resulting in severe injury or death Additionally grounding to gas pipes will result a gas leak and potential explosion result...

Page 6: ...ar away from fluorescent lamps as much as possible Indoor units are for indoor installation only Outdoor units can be installed either outdoors or indoors This unit is for outdoor use Do not install t...

Page 7: ...ces where the unit does not bother next door neighbors A locations where small animals will not make nests in the unit Safe places which can withstand the unit s weight and vibration and where the uni...

Page 8: ...wiring in conduits and ground the conduits Use non shielded wire for transmission wiring Refer to figure 4 1 Indoor unit 2 Fuse Breaker 3 Remote controller 4 Personal computer or radio 7 Space needed...

Page 9: ...le below inch mm 5 PRECAUTIONS ON INSTALLATION Before installation make sure the unit is level and the foundation is sturdy enough to prevent vibration and noise Fasten the unit in place using 4 found...

Page 10: ...ION Use a power wire pipe for the power supply wiring Outside the unit make sure the weak electric wiring i e for the remote controller cord between units etc and the strong electric wiring do not pas...

Page 11: ...ndoor unit 4 Under no circumstances should 208 230V be connected Precautions regarding the length of wiring between units Exceeding the following limits may cause transmission malfunctions so observe...

Page 12: ...e operation procedure in 7 7 Air tight test and vac uum drying regarding handling of the stop valve Only use the flare nuts included with the unit Using different flare nuts may cause the refrigerant...

Page 13: ...ntrol box Refer to figure 26 1 Putty or insulating material 2 field supply 7 5 Heat insulation of piping Highly recommended to insulate the interunit piping liquid and gas side and the refrigerant bra...

Page 14: ...joint from the following table RXTQ60 type KHRP26A22T9 Outdoor unit capacity type Refrigerant branch kit name How to select the refnet header Choose from the following table below the REFNET header a...

Page 15: ...id line stop valve Close 10 Indicates local procurement 11 Outdoor unit NOTE The stop valve must always be turned to closed Otherwise the refrigerant in the outdoor unit will pour out The names of par...

Page 16: ...k of the front panel All indoor units connected to the outdoor unit operate automatically Complete work on the indoor units in order to ensure maximum safety 10 1 Power On Check Operation Make sure to...

Page 17: ...running 3 Check to see if cold or hot air is coming out of the indoor unit 4 Press the fan direction and fan strength buttons on the indoor unit to see if they operate properly Precautions during tem...

Page 18: ...a the system automatically starts increasing its refrig erant temperature automatically reducing the delivered capacity and increasing the system s efficiency To activate this operation method under c...

Page 19: ...e of cooling operation the evaporating temperature is allowed to go down to 43 F 6 C on temporary base depending on the situ ation In case of heating operation the condense temperature is allowed to g...

Page 20: ...A B C D E F A Indoor unit set temperature B Operation start C Operating time D Mild E Quick F Powerful Example Automatic mode during cooling A B 100 70 E Tc C D 120 F 49 C F 115 F 46 C 36 F 2 C A Virt...

Page 21: ...and take whatever action is necessary to comply 1 Calculate the amount of refrigerant lb charged to each system separately NOTE Where a single refrigerant facility is divided into 2 entirely indepen...

Page 22: ...18 English MEMO 01_EN_3P591321 1B fm 18...

Page 23: ...Daikin Texas Technology Park 19001 Kermier Road Waller TX 77484 U S A 2001 3P591321 1B EM19A004A HT 00_CV_3P591321 1B fm 5...

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