HITACHI RAD-DJ18QHAE Air Home Ducted Split Unit Air Conditioner Installation Guide

HITACHI RAD-DJ18QHAE Air Home Ducted Split Unit Air Conditioner

Specifications:

• Product: Split Unit Air Conditioner
• Indoor Unit Models: RAD-DJ18QHAE, RAD-DJ25QHAE, RAD-DJ35QHAE

Product Information

The Split Unit Air Conditioner is designed for efficient cooling in residential or commercial spaces. It consists of indoor units with various models to suit different room sizes. Proper installation is crucial to ensure safe and optimal performance of the air conditioner.

Installation Instructions:

1. Pre-Installation:
   • Carefully read the installation manual before starting any work.
   • Inform customers about correct operation and maintenance post-installation.
   • Use tools like a torque wrench, pipe cutter, pliers, and others  as specified.
2. Installation Process:
   • Seek assistance from a qualified technician or sales agent for installation.
   • Ensure proper sealing of connections to prevent gas leakage.
   • Protect refrigerant tubing from damage during installation.
   • Mount units securely in locations that can support their weight.
   • Follow electrical installation rules and regulations strictly.

FAQ:

1. Q: Can I install the air conditioner myself?
   A: It is recommended to have a qualified technician or sales agent install the unit to avoid risks of water leakage, electric shock, or fire due to improper installation.

2. Q: What tools are required for installation?
   A: Tools needed include a torque wrench, pipe cutter, pliers, vacuum pump, gas leakage detector, and others as specified in the manual.

FOR SERVICE PERSONNEL ONLY

• Carefully read through the procedures of proper installation before starting installation work.
• The sales agent should inform customers regarding the correct operation of installation.

Tools Needed For Installation Work ( mark is tool exclusive use for R32)

(   mark is tool exclusive use for R32)

• + – Screwdriver
• Measuring Tape
• Knife
• Saw
• Pipe Cutter
• Hexagonal Wrench Key ( 4mm)
• Power Drill (ø 65mm ~ ø 80mm)
• Vacuum Pump
• Pliers or Wrench
•  Torque Wrench
• Vacuum Pump Adaptor
•  Flare Tool
• Gas Leakage Detector
• Manifold Valve
• Charge Hose
• Reamer
• File

WARNING

• Flare nut must use a torque wrench without fail. Tighten with the specifi ed tightening torque. If the fl are nut is tightened too much, after a long period of time, the fl are nut breaks, Gas leakage, stagnation, touching fi re, rarely cause ignition.
• Sharp bending of the pipe use the polyethylene rod, bend not crushed the pipe. Gas leakage from the crushed part, stagnation, touching fi re, rarely cause ignition.
• Please request your sales agent or qualifi ed technician to install your unit. Water leakage, short circuit or fi re may occur if you do the installation work yourself.
• Please observe the instructions stated in the installation manual during the process of installation. Improper installation may cause water leakage, electric shock and fi re.
• A brazed, welded, or mechanical connection shall be made before opening the valves to permit refrigerant to fl ow between the refrigerating system parts. A vacuum valve shall be provided to evacuate the interconnecting pipe and/or any uncharged refrigerating system part.
• Mechanical connectors used indoors shall comply with ISO 14903. When mechanical connectors are reused indoors, sealing parts shall be renewed. When fl ared joints are reused indoors, the fl are part shall be re-fabricated.
• Refrigerant tubing shall be protected or enclosed to avoid damage.
• Make sure that the units are mounted at locations which are able to provide full support to the weight of the units. If not, the units may collapse and impose danger.
• Observe the rules and regulations of the electrical installation and the methods described in the installation manual when dealing with the electrical work. Use power cables approved by the authorities of your country.
• Be sure to use the specifi ed wire for connecting the indoor and outdoor units. Please ensure that the connections are tight after the conductors of the wire are inserted into the terminals. Improper insertion and loose contact may cause over-heating and fi re.
• Please use the specifi ed components for installation work. Otherwise, the units may collapse or water leakage, electric shock and fi re may occur.
• Be sure to use the specifi ed piping set for R32. Otherwise, this may result in broken copper pipes or faults.
• When installing or removing an air conditioner, only specifi ed refrigerant (R32) shall be allowed, do not allow air or moisture to remain in the refrigeration cycle. Otherwise, pressure in the refrigeration cycle may become abnormally high so that a rupture may be caused.
• Be sure to ventilate fully if a refrigerant gas leak while at work. If the refrigerant gas comes into contact with fi re, a poisonous gas may occur. Be aware that refrigerants may not contain an odour.
• After completion of installation work, check to make sure that there is no refrigeration gas leakage. If the refrigerant gas leaks into the room, coming into contact with fi re in the fan-driven heater, space heater, etc., a poisonous gas may occur.
• Unauthorized modifi cations to the air conditioner may be dangerous. If a breakdown occurs please call a qualifi ed air conditioner technician or electrician. Improper repairs may result in water leakage, electric shock and fi re, etc.

CAUTION

• A circuit breaker or fuse must be installed. Without a circuit breaker or fuse the danger of electric shock exists. The external switch shall be incorporated to completely disconnect from power supply. It should disconnect all poles, and a contact separation of at least 3mm must be present.
• Do not install the unit near a location where there is fl ammable gas. The outdoor unit may catch fi re if fl ammable gas leaks around it.
• Do not install the indoor unit in a machine shop or kitchen where vapor from oil or its mist fl ows to the indoor unit. The oil will deposit on the heat exchanger, thereby reducing the indoor unit performance and may deform and in the worst case, break the plastic parts of the indoor unit.
• Please ensure smooth fl ow of water when installing the drain hose.
• Piping shall be suitable supported with a maximum spacing of 1m between the supports.

Refrigerant pipe size (outer diameter): Narrow pipe, Liquid (ø6.35mm); Wide pipe, Gas (ø9.52mm)

SAFETY PRECAUTION

• Read the safety precautions carefully before operating the unit.
• The contents of this section are vital to ensure safety. Please pay special attention to the following sign.
• WARNING …….. Incorrect methods of installation may cause death or serious injury.
• ****CAUTION ……… Improper installation may result in serious consequence.
• Make sure to connect earth wire.
• This sign in the fi gures indicates prohibition.

Be sure that the unit operates in proper condition after installation. Explain to customer the proper way of operating the unit as described in the user’s guide.

Access the full version of the User Installation Manual by scanning the code.

THE CHOICE OF MOUNTING SITE
(Please note the following matters and obtain permission from customer before installation.)

WARNING

• The unit should be mounted at stable, non-vibratory location which can provide full support to the unit.

WARNING

• No nearby heat source and no obstruction near the air outlet is allowed.
• The clearance distances from top, right and left are specifi ed in fi gure below.
• The location must be convenient for water drainage and pipe connection with the outdoor unit.
• To avoid interference from noise, please place the unit and its remote controller at least 1m from the radio and television.
• To avoid any error in signal transmission from the remote controller, please put the controller far away from high-frequency machines and high-power wireless systems.

WARNING

| WARNING

This symbol shows that this equipment uses a flammable refrigerant. If the refrigerant is leaked, together with an external ignition source, there is a possibility of ignition.

---|---
| CAUTION
This symbol shows that the Operation Instructions should be read carefully.
| CAUTION This symbol shows that a service personnel should be handling this equipment with reference to the Installation Manual.
| __CAUTION _
_This symbol shows that there is information included in the Operation Manual and/or Installation Manual.

Accessories to indoor Unit:

Other optional parts for display panel wired remote controller & wireless remote controller SPX-URFG & SPX-RKD800

[Indoor unit installation]

CAUTION
Always install the indoor unit at level. If the indoor unit is inclined, water may leak.

• “Height difference” and “Piping length” of Indoor and Outdoor unit are different by Outdoor unit. Please refer to the installation manual in Outdoor unit.

RECOMMENDATION FOR INSTALLATION

• The fi gures below are the recommended installation type for this duct model.
• All the optional parts mentioned for each installation type and screws should be purchased locally prior to the installation.

Need optional parts
when installing full duct type (Local purchase)

Need optional parts
when installing semi duct type (Local purchase)

Non duct type

Need optional parts
when installing non duct type (Local purchase)

Installation procedure and notice

Select the installation location carefully for the split type air conditioner. It is very difficult to move a split type air conditioner after the first installation.

• Make a hole on the wall as shown in Fig. 2-1.

The hole on the wall should be made with some inclination like Fig. 2-1 to keep the smooth fl ow of condensed water.

Connecting pipe installation

Seal the end of the pipes to prevent damage from moisture and water.

Drain pipe installation

• Use PVC pipe VP20 (O.D. 25mm) for drain pipe.
• You must roll an insulation (thickness 10mm or more) over the indoor section of the drain pipe.
• Position the drain pipe in the downward direction to enable free-fl ow of water. Fix it with a hanger and avoid twisting the pipe as shown in Fig. 2-3.

Do not do the installation as shown as above

• In case drain piping cannot be done smoothly due to obstacles, it can also be arranged outside of the main unit as shown in the drawing below.

Installation method of unit type
INSTALLATION OF FULL DUCT TYPE

• Select the indoor unit position, fi xing direction of air outlet so that cool/hot air reaches all the room. Standard position of the indoor unit is with the wall side on the ceiling.
• Remove the factory fi tted fi lter and fi lter holders before installing of full duct type.
• Permissible length and bending of duct.

| Permissible length| Bending
---|---|---
Discharging side duct| 4m or less added to suction side| 90° or less, 1 section
Suction side duct| 1m or less| 45° or less, 1 section

• Secure the space for installation, inspection or servicing.
• Apply water-proof treatment to back surface of ceiling under the indoor unit, to prevent water drop.
• Do not allow any obstacle to block air fl ow within 1m of suction grille.

Installation figure

Opening on ceiling and suspension bolt position

• Indoor unit

Chamber of suction grille

Chamber of discharge grille

• Arrange drain pipe, refrigerant pipe, and connecting cord in their installation position.
• For finishing of opening on ceiling, arrange with builder in detail.

Installation of suspension bolt

• Make sure to reinforce furring of ceiling (frame: ceiling joint and supporter) to maintain level of ceiling and prevent vibration of ceiling plate.
• Suspension bolts should be purchased in the fi eld.
• Refer to diagrams shown below for length of suspension bolts.

Preparation for installing indoor unit

• Remove the screw 3 of the electric box and then remove electric box.
• Relocate the electric box with lead wires kept connected. Ensure the lead wire is positioned at the upper side, and hook the claw of electric box to the bottom of the indoor unit using 4 screws.
• Install 4 suspension clamps at both sides of indoor unit, 2 clamps at each side, using 8 tapping screws 8. (Since size of left and right clamps are different for certain parts, refer to diagram on the right.)
• Install chamber of discharge of unit side on the indoor unit using 10 tapping screws.
• Remove the fi lter at the bottom side of indoor unit by unscrew 8 screws at the fi lter holders. (4 portions)
• Remove 6 screws at back plate of indoor unit. Then install the back plate at the bottom of indoor unit using 6 screws.
• Remove 2 screws at top plate of indoor unit and install chamber of suction of unit side using 7 screws.

Installation of indoor unit

• Set nut and washer on suspension bolt and hook it to suspend clamp by lifting the indoor unit.
• Make sure that the indoor unit is leveled using a level or vinyl hose with water.
• Fix the indoor unit so that the space between bottom surfaces of ceiling and indoor unit is 58mm.

CAUTION

• Be sure to install the indoor unit level. If the indoor unit is inclined, water may leak.
• If space between bottom surfaces of indoor unit and ceiling is not correct, there may be a gap between grille and ceiling surface, with consequent leakage of condensed water.

[Installation of chamber of suction grille] [Installation of chamber of discharge grille][Installation of suction grille] [Installation of discharge grille] [Installation of flexible duct] Refer to installation manual of optional part.

INSTALLATION OF SEMI DUCT TYPE

• Select the indoor unit position, fi xing direction of air outlet so that cool/hot air reaches the entire room. Standard position or the indoor unit is on wall side.
• Permissible length and bending of duct.

| Permissible length| Bending
---|---|---
Discharging side duct| **** 4m or less| 90° or less, 1 section

• Secure the space for installation, inspection or servicing.
• Apply waterproof treatment under the indoor unit to prevent water leak.
• Make sure that no obstacle is blocking the air fl ow within 1m of suction grille.

Installation figure

Opening on ceiling and suspension bolt position

Chamber of discharge grille

Installation of suspension bolt

• This is the same as for discharge/suction duct type. Follow instructions for discharge/suction duct type.

Preparation for installing indoor unit

• Remove the screw 3 of the electric box and then remove electric box.

• Relocate the electric box with lead wires kept connected. Ensure the lead wire is positioned at the upper side, and hook the claw of electric box to side plate. Then fix the electric box to the bottom of the indoor unit using 4 screws.

• Install 4 suspension clamps at both sides of indoor unit, 2 clamps at each side, using 8 tapping screws 8.
  (Since sizes of left and right clamps are different for certain parts, refer to diagram on the right.)

• Install chamber of discharge of unit side on the indoor unit using 10 tapping screws.

Installation of indoor unit

• Set nut and washer on suspension bolt and hook it to suspension clamp by lifting the indoor unit.
• Make sure that indoor unit is kept at level using a level or vinyl hose with water.
• Fix the indoor unit so that the space between bottom surfaces of ceiling and indoor unit is 58mm.

Refer to the installation manual of optional parts for installation of:

• Discharge grille chamber
• Suction grille
• Discharge grille
• Flexible duct

CAUTION

• Install the indoor unit in a straight level. If the indoor unit is inclined, water may leak.
• If space between bottom surfaces of indoor unit and ceiling is not correct, there may be a gap between grille and ceiling surface, with consequent leakage of condensed water.

INSTALLATION OF NON DUCT TYPE

Installation figure

• Select the indoor unit position, fi xing direction of air outlet so that cool/hot air reaches all the room.
• Do not allow any obstacle to block air fl ow within 1m of suction grille.

Opening on ceiling and suspension bolt position