MITSUBISHI ELECTRIC WT09757X01 Air Conditioners Instruction Manual

MITSUBISHI ELECTRIC WT09757X01 Air Conditioners

Product Information

The product is an air-conditioner unit designed for building applications. The model numbers for the indoor unit are CMB-WP108NU-AA, CMB-WP1016NU-AA, CMB- WP108NU-AB, and CMB-WP1016NU-AB. This installation manual provides instructions for safe and correct use of the air-conditioner unit.

Safety Precautions
Before installation and electric work, it is important to read and follow the safety precautions provided in the manual. These precautions include important points regarding safety to prevent injury or damage to the unit.

Precautions for Devices that Use R410A Refrigerant
When handling devices that use R410A refrigerant, it is cautioned to prevent dust, dirt, or water from entering the refrigerant cycle as it may deteriorate the refrigerant.

Product Usage Instructions

Installing the HBC Controller
To install the HBC controller, follow these steps:

1. Check the accessories that come with the HBC controller.
2. Install the HBC controllers according to the provided instructions.

Connecting Refrigerant Pipes and Drain Pipes
When connecting refrigerant pipes and drain pipes, follow these steps:

1. Connect the refrigerant pipes according to the provided instructions.

Selecting an Installation Site
Before selecting an installation site, consider the following:

• The product is suitable for specific installation sites.
• Avoid installing near heat sources, naked flames, or other ignition sources.

Securing Installation and Service Space
To secure installation and service space, follow the provided dimensions and instructions. The manual provides diagrams and measurements for different installation scenarios.

Checking the Installation Site
Before installation, check that the difference of elevation between indoor and outdoor units and the length of refrigerant piping are within the specified limitations.

INSTALLATION MANUAL
For safe and correct use, please read this installation manual thoroughly before installing the air-conditioner unit.

Safety precautions

Before installation and electric work

• Before installing the unit, make sure you read all the “Safety precautions”.
• The “Safety precautions” provide very important points regarding safety. Make sure you follow them.

Symbols used in the text

Warning:
Describes precautions that should be observed to prevent danger of injury or death to the user.

Caution:
Describes precautions that should be observed to prevent damage to the unit.

Symbols used in the illustrations

• Indicates an action that must be avoided.
• Indicates that important instructions must be followed.
• Indicates a part which must be grounded.
• Beware of electric shock. (This symbol is displayed on the main unit label.)

Warning:
Carefully read the labels affixed to the main unit.

HIGH VOLTAGE WARNING:

• Control box houses high-voltage parts.
• When opening or closing the front panel of the control box, do not let it come into contact with any of the internal components.
• Before inspecting the inside of the control box, turn off the power, keep the unit off for at least 10 minutes.

Warning:

• Ask the dealer or an authorized technician to install the air conditioner.
• Improper installation by the user may result in water leakage, electric shock, or fire.
• Install the unit at a place that can withstand its weight.
• Failure to do so may cause the unit to fall down, resulting in injuries and damage to the unit.
• Use the specified cables for wiring. Make the connections securely so that the outside force of the cable is not applied to the terminals.
• Inadequate connection and fastening may generate heat and cause a fire.
• Prepare for earthquakes and install the unit at the specified place.
• Improper installation may cause the unit to fall down and result in injury and damage to the unit.
• Always use accessories specified by Mitsubishi Electric.
• Ask an authorized technician to install the accessories. Improper installation by the user may result in water leakage, electric shock, or fire.
• Never repair the unit. If the air conditioner must be repaired, consult the dealer.
• If the unit is repaired improperly, water leakage, electric shock, or fire may result.
• If the supply cord is damaged, it must be replaced by the manufacturer, its service agent or similarly qualified persons in order to avoid a hazard.
• If refrigerant gas leaks during installation work or service, ventilate the room.
• If the refrigerant gas comes into contact with a flame, poisonous gases will be released.
• Install the air conditioner according to this Installation Manual.
• If the unit is installed improperly, water leakage, electric shock, or fire may result.
• Do not modify or adjust safety protection devices.
• Shorting of pressure or temperature switches to force operation may lead to damage, fire, explosions etc…
• Do not change the set values as this may lead to damage, fire, explosions etc…
• Use of any product except that specified by this company may lead to damage, fire, explosions etc…
• Do not spray water on electrical parts.
• This could lead to shorting, fire, smoke, electrical shock, unit failure etc…
• Do not create a situation where the refrigeration circuit is sealed yet incomplete with oil or refrigerant in the system.
• This may result in an explosion.
• Do not touch electrical components during or directly after operation.
• This may lead to burns.
• Put covers on control and terminal boxes.
• Shock due to ingress of dust, water, smoke, fire etc. may result.
• During refrigerant recovery or purge, fire may result.
• Do not operate with guards or panels removed.
• Injury due to rotating parts, electric shock due to high voltage or burns due to high temperatures may result.
• Do no sit, ride or place objects on the unit.
• Injury due to the unit falling may result.
• Use the appropriate safety gear.
• High voltages may result in electric shock.
• Hot parts may result in burns.
• Recover the refrigerant in the unit.
• Reuse the refrigerant or have it disposed of by a specialist.
• Release of refrigerant may damage the environment.
• Clear the pipework of remnant gas and oil.
• Failure to do so could lead to an eruption of flames and burns if the pipework is heated.
• Vacuum dry the refrigerant pipework. Do not replace with a refrigerant that has not been specified.
• This could lead to explosions, fire.
• Do not touch the onsite pipework ends.
• This could damage the pipework leading to refrigerant leaks and oxygen deficiency.
• Have all electric work done by a licensed electrician according to “Electric Facility Engineering Standard” and “Interior Wire Regulations” and the instructions given in this manual and always use a dedicated power supply.
• If the power source capacity is inadequate or electric work is performed improperly, electric shock and fire may result.
• Securely install the cover of control box.
• If the cover is not installed properly, dust or water may enter the outdoor unit and fire or electric shock may result.
• When installing and moving the air conditioner to another site, do not charge it with a refrigerant different from the refrigerant specified on the unit.
• If a different refrigerant or air is mixed with the original refrigerant, the refrigerant cycle may malfunction and the unit may be damaged.
• If the air conditioner is installed in a small room, measures must be taken to prevent the refrigerant concentration from exceeding the safety limit if the refrigerant should leak.
• Consult the dealer regarding the appropriate measures to prevent the safety limit from being exceeded. Should the refrigerant leak and cause the safety limit to be exceeded, hazards due to lack of oxygen in the room could result.
• When moving and reinstalling the air conditioner, consult the dealer or an authorized technician.
• If the air conditioner is installed improperly, water leakage, electric shock, or fire may result.
• After completing installation work, make sure that refrigerant gas is not leaking.
• If the refrigerant gas leaks and is exposed to a fan heater, stove, oven, or other heat source, it may generate noxious gases.
• Do not reconstruct or change the settings of the protection devices.
• If the pressure switch, thermal switch, or other protection device is shorted or operated forcibly, or parts other than those specified by Mitsubishi Electric are used, fire or explosion may result.
• To dispose of this product, consult your dealer.
• The installer and system specialist shall secure safety against leakage according to local regulation or standards.
• Choose the appropriate wire size and the switch capacities for the main power supply described in this manual if local regulations are not available.
• Pay special attention to the place of installation, such as basement, etc. where refrigeration gas can accumulate, since refrigerant is heavier than the air.
• This appliance is not intended for use by persons (including children) with reduced physical, sensory or mental capabilities, or lack of experience and knowledge, unless they have been given supervision or instruction concerning use of the appliance by a person responsible for their safety.
• Children should be supervised to ensure that they do not play with the appliance.
• This appliance is intended to be used by expert or trained users in shops, in light industry and on farms, or for commercial use by lay persons.

Precautions for devices that use R410A refrigerant

Caution:

• Do not use existing refrigerant piping.
• The old refrigerant and refrigerant oil in the existing piping contain a large amount of chlorine which may cause the refrigerant oil of the new unit to deteriorate.
• R410A is high-pressure refrigerant and can cause the existing piping to burst.
• Use refrigerant piping made of phosphorus deoxidized copper and copper alloy seamless pipes and tubes. In addition, be sure that the inner and outer surfaces of the pipes are clean and free of hazardous sulphur, oxides, dust/dirt, shaving particles, oils, moisture, or any other contaminant.
• Contaminants on the inside of the refrigerant piping may cause the refrigerant residual oil to deteriorate.
• Store the piping to be used during installation indoors and keep both ends of the piping sealed until just before brazing. (Store elbows and other joints in a plastic bag.)
• If dust, dirt, or water enters the refrigerant cycle, deterioration of the oil and compressor failure may result.
• Apply a small amount of ester oil, ether oil, or alkyl benzene to flares. (for indoor unit)
• Infiltration of a large amount of mineral oil may cause the refrigerant oil to deteriorate.
• Do not use a refrigerant other than R410A.
• If another refrigerant (R22, etc.) is mixed with R410A, the chlorine in the refrigerant may cause the refrigerant oil to deteriorate.
• Use a vacuum pump with a reverse flow check valve.
• The vacuum pump oil may flow back into the refrigerant cycle and cause the refrigerant oil to deteriorate.
• 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, refrigerant recovery equipment)
• If the conventional refrigerant and refrigerant oil are mixed in the R410A, the refrigerant may deteriorate.
• If water is mixed in the R410A, the refrigerant oil may deteriorate.
• Since R410A does not contain any chlorine, gas leak detectors for conventional refrigerants will not react to it.
• Do not use a charging cylinder.
• Using a charging cylinder may cause the refrigerant to deteriorate.
• Do not use antioxidant or leak-detection additive.
• Be especially careful when managing the tools.
• If dust, dirt, or water gets into the refrigerant cycle, the refrigerant may deteriorate.

Before installation

Caution:

• Do not install the unit where combustible gas may leak.
• If the gas leaks and accumulates around the unit, an explosion may result.
• This product is not designed to assist in the preservation of food, provide conditions to maintain plants or animals, or stabilize environments for the preservation of precision equipment or art objects. To prevent loss of quality, do not use the product for purposes other than those it is designed for.
• Do not use the air conditioner in special environments.
• Oil, steam, sulfuric smoke, etc. can significantly reduce the performance of the air conditioner or damage its parts.
• When installing the unit in a hospital, communication station, or similar place, provide sufficient protection against noise.
• Sound pressure level does not exceed 70 dB(A). However, inverter equipment, private power generator, high-frequency medical equipment, or radio communication equipment may cause the air conditioner to operate erroneously, or fail to operate. On the other hand, the air conditioner may affect such equipment by creating noise that disturbs medical treatment or image broadcasting.
• Do not install the unit on or over things that are subject to water damage.
• When the room humidity exceeds 80 % or when the drain pipe is clogged, condensation may drip from the indoor unit or HBC controller. Perform collective drainage work together with the outdoor unit, as required.
• Do not install the unit where corrosive gas may be generated.
• Doing so can corrode the pipes, resulting in refrigerant leakage and fire.
• Check that markings of the unit are not illegible.
• Illegible warning or caution markings may cause damage to the unit, resulting in injury.

Before installation (relocation) – electrical work

Caution:

• Ground the unit.
• Do not connect the ground wire to gas or water pipes, lightning rods, or telephone ground lines. Improper grounding may result in electric shock.
• Install the power cable so that tension is not applied to the cable.
• Tension may cause the cable to break and generate heat and cause a fire.
• Install a leak circuit breaker, as required.
• If a leak circuit breaker is not installed, electric shock may result.
• Use power line cables of sufficient current carrying capacity and rating.
• Cables that are too small may leak, generate heat, and cause a fire.
• Use only a circuit breaker and fuse of the specified capacity.
• A fuse or circuit breaker of a larger capacity, or the use of substitute simple steel or copper wire may result in a general unit failure or fire.
• Do not wash the air conditioner units.
• Washing them may cause an electric shock.
• Be careful that the installation base is not damaged by long use.
• If the damage is left uncorrected, the unit may fall and cause personal injury or property damage.
• Install the drain piping according to this Installation Manual to ensure proper drainage. Wrap thermal insulation around the pipes to prevent condensation.
• Improper drain piping may cause water leakage causing damage to furniture and other possessions.
• Be very careful about transporting the product.
• One person should not carry the product. Its weight is in excess of 20 kg.
• Some products use PP bands for packaging. Do not use any PP bands as a means of transportation. It is dangerous.
• 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. If children play with a plastic bag which has not been torn apart, they face the risk of suffocation.

Before starting the test run

Caution:

• Turn on the power at least 12 hours before starting operation.
• Starting operation immediately after turning on the main power switch can result in irreversible damage to internal parts. Keep the power switch turned on during the operational season.
• Do not touch the switches with wet fingers.
• Touching a switch with wet fingers can result in an electric shock.
• Do not touch the refrigerant pipes during and immediately after operation.
• During and immediately after operation, the refrigerant pipes may be hot or 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 operate the air conditioner with the panels and guards removed.
• Rotating, hot, or high-voltage parts can cause injuries.
• Do not turn off the power immediately after stopping operation.
• Always wait at least 5 minutes before turning off the power. Otherwise, drainage water leakage or mechanical failure of sensitive parts may occur.
• Check for refrigerant leaks before service.
• If the refrigerant leaks, fire may result.

Selecting an installation site

• This unit uses R410A-type refrigerant.
• Indoor units that are all WL models are connectable to the HBC controller.
• Piping for systems using R410A may be different from that for systems using conventional refrigerant because the design pressure in systems using R410A is higher. Refer to the Data Book for more information.
• Some of the tools and equipment used for installation with systems that use other types of refrigerant cannot be used with the systems using R410A. Refer to the Data Book for more information.
• Do not use the existing piping, as it contains chlorine, which is found in conventional refrigerating machine oil and refrigerant. This chlorine will deteriorate the refrigerant machine oil in the new equipment. The existing piping must not be used as the design pressure in systems using R410A is higher than that in the systems using other types of refrigerant and the existing pipes may burst.

Installation site

• Install the unit in a place not exposed to rain. The HBC controller is designed to be installed indoors.
• Install the unit with adequate space around it for servicing.
• Do not install the unit in a place that would result in the piping length restrictions being exceeded.
• Check for refrigerant leaks before service.
• If the refrigerant leaks, fire may result.
• Install or store the unit in a place not exposed to direct radiant heat from other heat sources or naked flame or other ignition sources.
• Do not install the unit in any oily steamy place or near any machine that generates high frequencies. Doing so may cause a risk of fire, erroneous operation or condensation.
• Depending on the operation conditions, HBC controller generates noise caused by valve actuation, refrigerant flow, and pressure changes even when operating normally. Therefore install the unit in places such as ceilings of corridor, restrooms and plant rooms.
• Install indoor unit and HBC controller at least 5 m [16-3/8 ft] away from each other when installed in a space with low background noise, e.g., hotel rooms.
• Allow enough space and access to ensure water piping, refrigerant piping and electrical wiring can be easily connected.
• Avoid places exposed to the generation, inflow, accumulation or leakage of flammable and sulfuric gases.
• Ensure a downward gradient of at least 1/100 for drain piping.
• Properly install the unit on a stable, load-bearing surface.

For hanging from the ceiling

• Provide 2 inspection holes 450 mm [17-3/4 in] square in the ceiling surface as shown in [Fig. 2.3.1]. [Fig. 2.2.1]
• Install the unit in a suitable location (such as in the ceiling of a corridor or in the bathroom etc) away from places regularly occupied. Avoid installing in the center of a room.
• Ensure hanging bolts are of sufficient pull out strength.

Warning:

• Be sure to install the unit in a place that can sustain the entire weight.
• If there is a lack of strength, it may cause the unit to fall down, resulting in an injury.

Caution:

• Be sure to install the unit horizontally. Install the HBC controller level (less than 1° tilt), so that the drain pan can function correctly.
• Install the HBC controller in an environment where the temperature in always above 0°C [32°F].

Securing installation and service space

For hanging from the ceiling
(This is a reference view showing the least installation space.) [Fig. 2.3.1]

• A Inspection hole
• B Side of outdoor unit piping
• C Control box
• D Side of indoor unit piping
• E Water inlet
• F Service space
• G Indoor unit side

1 Dimensions with which pipe connection can be handled at site

Checking the installation site
Check that the difference of elevation between indoor and outdoor units and the length of refrigerant piping are within the following limitations.

CMB-WP108NU-AA + CMB-WP108NU-AB (CMB-WP1016NU-AA) (CMB-WP1016NU-AB) [Fig. 2.4.1]

• A Outdoor unit
• B Main-HBC controller
• C Sub-HBC controller
• D Indoor unit
• E Less than H=50 m [164 ft] (when the outdoor unit is higher than the HBC controller)
• F Less than H1=40 m [131 ft] (when the outdoor unit is lower than the HBC controller)
• G Branch joint (field supply)
• H Less than 110 m [360 ft]
• I Less than 60 m [196 ft]
• J Up to three units for 1 branch port Total capacity: less than 30 (but in same mode, cooling/heating)
• K Less than 15 m [49 ft]
• L Less than 15 m [49 ft]

(Unit: m [ft])

Pipe Lengths

| Between outdoor unit and HBC controller (refrigerant pipework)| A| 110 [360] or less
Water pipework between indoor units and HBC controller| f + g| 60 [196] or less

Difference of elevation

| Between indoor and outdoor units| Above outdoor unit| H| 50 [164] or less
Below outdoor unit| H1| 40 [131] or less
Between indoor units and HBC controller| h1| 15 [49] or less
Between indoor units| h2| 15 [49] or less

Notes:

1. Indoor units that are connected to the same branch joint cannot be simultaneously operated in different operation modes.
2. CMB-WP108NU-AA + CMB-WP108NU-AB (CMB-WP1016NU-AA) (CMB-WP1016NU-AB) [Fig. 2.4.2]

• A Outdoor unit
• B Main-HBC controller
• C Sub-HBC controller
• D Indoor unit
• E Less than H=50 m [164 ft] (when the outdoor unit is higher than the indoor unit)
• F Less than H1=40 m [131 ft] (when the outdoor unit is lower than the indoor unit)
• G Twinning pipe (field supply)
• H Less than 110 m [360 ft]
• I Less than 60 m [196 ft]
• J Up to three units for 1 branch port Total capacity: less than 30 (but in same mode, cooling/heating)
• K Less than 15 m [49 ft]
• L Less than 15 m [49 ft]
• M Less than 15 m [49 ft]
• N Branch joint (field supply)

(Unit: m [ft])

Pipe Lengths

| Between outdoor unit and

HBC controller (refrigerant pipe- work)

|

A1 + A2 + A3

|

110 [360] or less

Water pipework between indoor units and HBC controller| f + g| 60 [196] or less
Between HBC controllers| B| 40 [131] or less

Difference of elevation

| Between indoor and outdoor units| Above outdoor unit| H| 50 [164] or less
Below outdoor unit| H1| 40 [131] or less
Between indoor units and HBC controller| h1| 15 [49] or less
Between indoor units| h2| 15 [49] or less
Between HBC controllers| h3| 15 [49] or less

Installing the HBC controller

Checking the accessories with the HBC controller

The following items are supplied with each HBC controller.

CMB-WP108NU-AA CMB-WP1016NU-AA
 | Item| Qty
1| Installation manual| 1
2| Wrench| 1
 | Model name
---|---
CMB-WP108NU-AB CMB-WP1016NU-AB
 | Item| Qty
1| Installation manual| 1

Installing HBC controllers

Installing hanging bolts

• Install locally procured hanging bolts (threaded rod) following the procedure given in the figure. The hanging bolt size is ø10 mm [13/32 in] (M10 screw).
• To hang the unit, use a lifting machine to lift and pass it through the hanging bolts. The suspension bracket has an oval hole. Use a large diameter washer. [Fig. 3.2.1]

1. Hanging method
   • A: Min.30 mm [1-3/16 in]
   • A. Hanging bolt ø10 mm [13/32 in] (field supply)
   • B. Washer (field supply)

• A Within 1.0º
• B Drain socket
• C Viewed from the front of the control box
• D Viewed from the drain socket side

Be sure to install the HBC controller horizontally. Check using a level. If the controller is installed at an angle, drain water may leak out. If the unit is slanted, loosen the fixing nuts on the hanging brackets to adjust its position. Install the HBC controller level (less than 1° tilt), so that the drain pan can function correctly.

Caution:

• Be sure to install the unit horizontally. Install the HBC controller level (less than 1° tilt), so that the drain pan can function correctly.
• Install the HBC controllers with the hanging length within 200 mm [7-7/8 in] or shorter.

Connecting refrigerant pipes and drain pipes

Connecting refrigerant pipes

1. Be sure to use non-oxidative brazing where necessary. If you do not use non-oxi-dative brazing, it may clog the pipes. When brazing the outdoor unit connecting port of HBC controller, supply nitrogen gas into the pipe between the outdoor unit and HBC controller.
2. After completing pipe connection, support the pipes to ensure that load is not imparted to the HBC controller’s end connections.
3. When using mechanical couplings, use the ones that meet ISO14903.
4. Support the on-site pipes near the HBC controller at 0.5-meter [19-11/16 in] inter-vals or less, and at 2-meter [78-3/4 in] intervals or less in other areas.

Warning:
When installing and moving the unit, do not charge it with refrigerant other than the refrigerant (R410A) specified on the unit.

• Mixing of a different refrigerant, air, etc. may cause the refrigerant cycle to malfunction and result in severe damage.

Caution:

• Use refrigerant piping made of phosphorus deoxidized copper and copper alloy seamless pipes and tubes. In addition, be sure that the inner and outer surfaces of the pipes are clean and free of hazardous sulphur, oxides, dust/dirt, swarf, oils, moisture, or any other contaminants.
• R410A is high-pressure refrigerant and can cause the existing piping to burst.
• Store the piping to be used during installation indoors and keep both ends of the piping sealed until just before brazing. (Store elbows and other joints in a plastic bag.)
  • If dust, dirt, or water enters the refrigerant cycle, deterioration of the oil and compressor failure may result.
  • Infiltration of a large amount of mineral oil may cause the refrigerant oil to deteriorate.
• Do not vent R410A into the atmosphere.

Size of HBC controller’s end connection piping [Fig. 4.1.2]

Use of one HBC controller

(Unit: mm [in])

Outdoor unit side

| PURY-(E)P72T/

YNU

|

(HBC controller) CMB-WP108NU-AA

CMB-WP-1016NU-AA *2

| ø15.88 [5/8] (Brazing)| ø19.05 [3/4] (Brazing)
PURY-(E)P96T/

YNU

| ø19.05 [3/4] (Brazing)| ø22.2 [7/8] (Brazing)
PURY-(E)P120T/

YNU

| ø19.05 [3/4] (Brazing)| ø28.58 [1-1/8] (Brazing)

Use of two HBC controllers

twinning pipe and HBC controller
High pressure side| Low pressure side| High pressure side| Low pressure side

Outdoor unit side

| PURY-(E)P72T/

YNU

| ****

(HBC controller) CMB-WP108NU-AA

CMB-WP-1016NU-AA *2

| ø15.88 [5/8] (Brazing)| ø19.05 [3/4] (Brazing)| ø15.88 [5/8] (Brazing)

for each HBC controller

| ø19.05 [3/4] (Brazing)

for each HBC controller

PURY-(E)P96T/

YNU

| ø19.05 [3/4] (Brazing)| ø22.2 [7/8] (Brazing)| ø15.88 [5/8] (Brazing)

for each HBC controller

| ø19.05 [3/4] (Brazing)

for each HBC controller

PURY-(E)P120T/

YNU

| ø19.05 [3/4] (Brazing)| ø28.58 [1-1/8] (Brazing)| ø15.88 [5/8] (Brazing)

for each HBC controller

| ø19.05 [3/4] (Brazing)

for each HBC controller

PURY-(E)P144T/

YNU

| ø22.2 [7/8] (Brazing)| ø28.58 [1-1/8] (Brazing)| ø15.88 [5/8] (Brazing)

for each HBC controller

| ø19.05 [3/4] (Brazing)

for each HBC controller

PURY-(E)P168T/

YNU

| ø22.2 [7/8] (Brazing)| ø28.58 [1-1/8] (Brazing)| ø19.05 [3/4] (Brazing)

for each HBC controller

| ø22.2 [7/8] (Brazing)

for each HBC controller

• A To outdoor unit
• B End connection (brazing)
• C Main-HBC controller
• D Sub-HBC controller
• E Indoor unit
• F Branch joint (field supply)
• G Up to three units for 1 branch hole; total capacity: below 30 (but in same mode, cooling/heating)

Note:

• Be sure to use non-oxidative brazing.
  1. To connect multiple indoor units to a port
• Maximum total capacity of connected indoor units: WL30
• Maximum number of connectable indoor units: 3 units
• Branch joints are field-supplied.
  1. PURY-(E)P-120T/YNU model or larger requires a connection of two main- HBC controllers in parallel.
• For the connection with outdoor units other than those listed in the table, refer to the Databook of the HBC controller.  [Fig. 4.2.1]
• A Main-HBC controller
• B Twinning pipe (field supply)

(Unit: mm [in])

Slope of twinning pipes (high-pressure side and low-pressure side)
When using twinning pipes on the high-pressure piping and the low-pressure piping, connect them horizontally.

If the slope exceeds the specified angle, it may cause lack of capacity.

Notes:

• Have a fire extinguisher nearby before brazing work.
• Provide no-smoking signs at the brazing workplace.
• After pipe connection, be sure to check that there is no gas leakage, using a leak detector or soap-and-water solution.
• Before brazing the refrigerant piping, always wrap the piping on the main body, and the thermal insulation piping, with damp cloths to prevent heat shrinkage and burning the thermal insulation tubing. Take care to ensure that the flame does not come into contact with the main body itself.
• Do not use leak-detection additives.
• Straight run of pipe connecting twinning pipe is 500 mm [19-11/16 in] or more.
• Piping work shall be kept to a minimum.
• The pipes shall be protected from physical damage.

Warning:
Do not mix anything other than the specified refrigerant (R410A) into the refrigerating cycle when installing or moving. Mixing air may cause the refrigerating cycle to reach abnormally high temperature, resulting in burst pipes.

Caution:
Cut the tip of the outdoor unit piping, remove the gas, and then remove the brazed cap.  [Fig. 4.2.2]

Insulating pipes
Be sure to add insulation work to piping by covering high-temperature pipe and low-temperature pipe separately with enough thickness heat-resistant polyethylene foam, so that no gap is observed in the joint between the HBC controller and insulating material, and insulating materials themselves. When insulation work is insufficient, there is a possibility of condensation. Pay special attention to insulation work in the ceiling plenum.  [Fig. 4.3.1]

• A Locally procured insulating material for pipes
• B Bind here using band or tape.
• C Do not leave any opening.
• D Lap margin: more than 40 mm [1-5/8 in]
• E Insulating material (field supply)
• F Unit side insulating material

Insulation materials for the pipes to be added on site must meet the following specifications:

Outdoor unit

-HBC controller

| High-pressure pipe| 10 mm [13/32 in] or more
---|---|---
Low-pressure pipe| 20 mm [13/16 in] or more
Temperature Resistance| 100°C [212°F] min.

• Installation of pipes in a high-temperature high-humidity environment, such as the top floor of a building, may require the use of insulation materials thicker than the ones specified in the chart above.
• When certain specifications presented by the client must be met, ensure that they also meet the specifications on the chart above.
• The brazed connections must be covered with insulation, with its seam facing upward and fastened with the bands.

Additional refrigerant charge

Notes:

• Charge refrigerant in a liquid state.
• Charging refrigerant in the gaseous state will change the composition of the refrigerant and lead to a performance drop.
• Do not use a charging cylinder when charging refrigerant.
• The use of a charging cylinder may change the composition of the refrigerant and lead to a performance drop.
• For the connection with outdoor units other than those listed in the table, refer to the Databook of the HBC controller.

The table below summarizes the factory-charged amount of refrigerant, the maximum amount of refrigerant to be added on site, and the maximum total amount of refrigerant in the system. The amount of refrigerant that is shown in the table below is factory-charged in the outdoor units. The amount necessary for extended piping is not included and needs to be added on site.

Unit model| Factory-charged

amount [kg (oz)]

---|---
PURY-P72T/YNU| 5.2 (184)
PURY-P96T/YNU| 8.0 (283)
PURY-P120T/YNU| 8.0 (283)
PURY-P144T/YNU| 10.8 (381)
PURY-P168T/YNU| 10.8 (381)
Unit model| Factory-charged

amount [kg (oz)]

---|---
PURY-EP72T/YNU| 5.2 (184)
PURY-EP96T/YNU| 8.0 (283)
PURY-EP120T/YNU| 8.0 (283)
PURY-EP144T/YNU| 10.8 (381)
PURY-EP168T/YNU| 10.8 (381)

The amount of refrigerant that is shown in the table below is the maximum amount to be added on site.

Unit model

| Maximum amount to be added [kg (oz)]
---|---
PURY-P72T/YNU| 21 (741)
PURY-P96T/YNU| 25.4 (896)
PURY-P120T/YNU| 25.4 (896)
PURY-P144T/YNU| 33.1 (1168)
PURY-P168T/YNU| 33.1 (1168)

Unit model

| Maximum amount to be added [kg (oz)]
---|---
PURY-EP72T/YNU| 21 (741)
PURY-EP96T/YNU| 25.4 (896)
PURY-EP120T/YNU| 25.4 (896)
PURY-EP144T/YNU| 33.1 (1168)
PURY-EP168T/YNU| 33.1 (1168)

Both refrigerant overcharge and undercharge will cause problems. Charge the system with the proper amount of refrigerant. Record the added refrigerant amount on the label attached to the control box panel for future servicing.

Calculation of the amount of additional refrigerant

• The amount of refrigerant to be added depends on the size and the total length of the high-pressure piping and liquid piping.
• Calculate the amount of refrigerant to be charged according to the formula below.
• Round up the calculation result to the nearest 0.1 kg (0.1 oz).
• The refrigerant does not need to be added for the indoor units in a Hybrid City Multi system.

(E)P72 to 168T/YNU (R410A refrigerant)

1. Units “m” and “kg”

• When the piping length from the outdoor unit to the farthest HBC controller is 30.5 m (100 ft) or shorter
• Amount of refrigerant to be charged for single-module units
• In the case all connected indoor unit models are Case 1, do Not add the refrigerant listed in table . Instead, add the following amount of refrigerant. Case 1: PEFY-WL06/24NMAU-A**
  • Add 0.55 kg per PEFY-WL06/24NMAU-A**.
• When the piping length from the outdoor unit to the farthest HBC controller is longer than 30.5 m (100 ft)
• Amount of refrigerant to be charged for single-module units
• In the case all connected indoor unit models are Case 1, add the following amount of refrigerant. Case 1: PEFY-WL06/24NMAU-A**
  • Add 0.55 kg per PEFY-WL06/24NMAU-A**.