Toshiba Carrier Rav Sp360ct Ul User Manual

AIR CONDITIONER (SPLIT TYPE)  
Installation Manual  
Indoor Unit  
Model name:  
Under Ceiling Type  
RAV-SP180CT-UL  
RAV-SP240CT-UL  
RAV-SP300CT-UL  
RAV-SP360CT-UL  
RAV-SP420CT-UL  
Installation Manual  
Air conditioner (Split type)  
English  
1
Manuel d’installation  
Climatiseur (Type split)  
Français  
33  
Installation Manual  
Under Ceiling Type  
1 ACCESSORY PARTS  
Accessory parts  
Part name  
Owner’s Manual  
Installation Manual  
Installation pattern  
Q’ty  
Shape  
Usage  
1
1
1
This manual  
Drawing-out port of hanging bolt pipe  
Thermal insulation pipe  
Washer  
2
4
For thermal insulation of pipe connecting section  
3/8” (M10) × Ø1.0” (25 mm) For holding down unit  
For connecting drain pipe  
Hose band  
2
1
1
Drain hose  
For connecting drain pipe  
Bushing Ø2.2” (Ø56)  
For protection of edge at hole for remote control wires  
Bushing Ø1.1” (Ø28)  
Thermal insulator  
1
For sealing the back side conduit hole  
For thermal insulation of drain hose  
(0.4” - thickness × 7.9” × 7.9” (10 - thickness × 200 × 200 mm))  
1
1
2
Thermal insulator of top  
plate  
For upper pipe hole of indoor unit  
(0.2” - thickness × 5.1” × 6.3” (6 - thickness × 130 × 160 mm))  
Banding band  
For prevention of open of drain hose thermal insulator  
EN  
2-EN  
– 2 –  
Installation Manual  
Under Ceiling Type  
2 PRECAUTIONS FOR SAFETY  
Installing, starting up, and servicing air--conditioning equipment can be hazardous due to system pressures,  
electrical components, and equipment location (roofs, elevated structures, etc.).  
Only trained, qualified installers and service mechanics should install, start--up, and service this equipment.  
Untrained personnel can perform basic maintenance functions such as cleaning heat exchanger. All other  
operations should be performed by trained service personnel.  
When working on the equipment, observe precautions in the literature and on tags, stickers, and labels attached  
to the equipment.  
Follow all safety codes.Wear safety glasses and work gloves. Keep quenching cloth and fire extinguisher nearby  
when brazing. Use care in handling, rigging, and setting bulky equipment.  
Read these instructions thoroughly and follow all warnings or cautions included in literature and attached to the  
unit. Consult local building codes and National Electrical Code (NEC) for special requirements. Recognize safety  
information. This is the safety--alert symbol  
. When you see this symbol on the unit and in instructions or  
manuals, be alert to the potential for personal injury.Understand these signal words: DANGER, WARNING, and  
CAUTION. These words are used with the safety--alert symbol.  
DANGER identifies the most serious hazards which will result in severe personal injury or death. WARNING  
signifies hazards which could result in personal injury or death. CAUTION is used to identify unsafe practices which  
may result in minor personal injury or product and property damage. NOTE is used to highlight suggestions which  
will result in enhanced installation, reliability, or operation.  
WARNING  
Ask an authorized dealer or qualified installation professional to install (including moving)/maintain the air  
conditioner.  
Inappropriate installation may result in water leakage, electric shock or fire.  
Be sure to connect ground wire. (grounding work)  
Incomplete grounding cause an electric shock.  
Do not connect ground wires to gas pipes, water pipes, lightning rods or ground wires for telephone wires.  
Turn off the circuit breaker before attempting any electrical work.  
Make sure all circuit breaker is off. Failure to do so may cause electric shock.  
Install the refrigerant pipe securely during the installation work before operating the air conditioner.  
If the air conditioner is operated with the valve open and without the refrigerant pipe, the compressor sucks air and  
the refrigeration cycle is overpressurized, which may cause a burst or injury.  
When moving the air conditioner for the installation into another place, be very careful not to enter any  
gaseous matter other than the specified refrigerant into the refrigeration cycle.  
If air or any other gas is mixed in the refrigerant, the gas pressure in the refrigeration cycle becomes abnormally high  
and it resultingly causes pipe burst and injuries on persons.  
Perform installation work properly according to the Installation Manual.  
Inappropriate installation may result in water leakage, electric shock or fire.  
When the air conditioner is installed in a small room, provide appropriate measures to ensure that the  
concentration of refrigerant leakage occur in the room does not exceed the critical level.  
Install the air conditioner securely in a location where the base can sustain the weight adequately.  
Perform the specified installation work to guard against an earthquake.  
If the air conditioner is not installed appropriately, accidents may occur due to the falling unit.  
If refrigerant gas has leaked during the installation work, ventilate the room immediately.  
If the leaked refrigerant gas comes in contact with fire, noxious gas may generate.  
After the installation work, confirm that refrigerant gas does not leak.  
If refrigerant gas leaks into the room and flows near a fire source, such as a cooking range, noxious gas might  
generate.  
Electrical work must be performed by a qualified electrician in accordance with the Installation Manual. Make  
sure the air conditioner uses an exclusive power supply.  
An insufficient power supply capacity or inappropriate installation may cause fire.  
Use the specified wires for wiring connect the terminals securely fix.  
To prevent external forces applied to the terminals from affecting the terminals.  
3-EN  
– 3 –  
Installation Manual  
Under Ceiling Type  
Conform to the regulations of the local electric company when wiring the power supply.  
Inappropriate grounding may cause electric shock.  
For the refrigerant recovery work (collection of refrigerant from the pipe to the compressor), stop the  
compressor before disconnecting the refrigerant pipe.  
If the refrigerant pipe is disconnected while the compressor is working with the valve open, the compressor sucks air  
and the refrigeration cycle is overpressurized, which may cause a burst or injury.  
CAUTION  
THIS AIR CONDITIONER ADOPTS THE NEW HFC REFRIGERANT (R410A) WHICH DOES NOT DESTROY  
OZONE LAYER.  
• The characteristics of R410A refrigerant are ; easy to absorb water, oxidizing membrane or oil, and its pressure is  
approx. 1.6 times higher than that of refrigerant R22. Accompanied with the new refrigerant, refrigerating oil has also  
been changed. Therefore, during installation work, be sure that water, dust, former refrigerant, or refrigerating oil does  
not enter the refrigerating cycle.  
• To prevent charging an incorrect refrigerant and refrigerating oil, the sizes of connecting sections of charging port of  
the main unit and installation tools are changed from those for the conventional refrigerant.  
• Accordingly the exclusive tools are required for the new refrigerant (R410A).  
• For connecting pipes, use new and clean piping designed for R410A, and please care so that water or dust does not  
enter.  
Tighten the flare nut with a torque wrench in the specified manner.  
Excessive tightening of the flare nut may cause a crack in the flare nut after a long period, which may result in  
refrigerant leakage.  
Wear heavy gloves during the installation work to avoid injury.  
The installation fuse must be used for the power supply line of this conditioner.  
EN  
4-EN  
– 4 –  
Installation Manual  
Under Ceiling Type  
3 SELECTION OF INSTALLATION PLACE  
Installation space  
WARNING  
Secure the specified space in the figure for  
Install the air conditioner at enough strong place  
installation and servicing.  
to withstand the weight of the unit.  
If the strength is not enough, the unit may fall down  
resulting in injury.  
Unit: in (mm)  
Install the air conditioner at a height 8’ (2.4 m) or  
more from the floor.  
If you insert your hands or others directly into the unit  
while the air conditioner operates, it is dangerous  
because you may contact with revolving fan or active  
electricity.  
9.8” (250)  
or more  
9.8” (250)  
or more  
CAUTION  
Do not install the air conditioner in a location  
subject to a risk of exposure to a combustible gas.  
If a combustible gas leaks and stays around the unit,  
a fire may occur.  
Upon approval of the customer, install the air  
conditioner in a place that satisfies the  
following conditions.  
• Place where the unit can be installed horizontally.  
• Place where a sufficient servicing space can be  
ensured for safety maintenance and check.  
Height of ceiling  
Set the installable height of the ceiling within 13’1” (4  
m), otherwise the air distribution will become poor.  
If height of ceiling exceeds 11’6” (3.5 m), hot air  
becomes difficult to reach the floor surface, and then  
the change of setup of high ceiling is necessary.  
For the change method of high ceiling, refer to the  
application control, “In case of installation to high  
ceiling” and “In case of incorporating filter sold  
separately” in this Manual.  
• Place where drained water will not cause any  
problem.  
Avoid installing in the following places.  
• Place exposed to air with high salt content (seaside  
area), or place exposed to large quantities of sulfide  
gas (hot spring).  
List of installable ceiling height  
(Should the unit be used in these places, special  
protective measures are needed.)  
• Place exposed to oil, vapor, oil smoke or corrosive  
gas.  
• Place where organic solvent is used nearby.  
• Place close to a machine generating high frequency.  
Setup data  
Standard  
0000  
0001  
11’6” (3.5 m) or less  
(Factory default)  
more than 11’6” (3.5 m)  
up to 13’1” (4.0 m)  
High ceiling 1  
• Place where the discharged air blows directly into  
the window of the neighbor house. (Outdoor unit)  
• Place where noise of the outdoor unit is easily  
transmitted.  
According to the conditions of installation, setup time of  
turning-on of filter sign (notification of filter cleaning) of  
the remote control can be changed.  
When it is difficult to warm up the room due to  
installation place or structure of the room, the detection  
temperature of heating can be raised.  
For change the setup time, refer to the application  
control, “Change of filter sign turning-on time” and  
“How to increase the heating effect” in this Manual.  
(When install the outdoor unit on the boundary with  
the neighbor, pay due attention to the level of noise.)  
• Place with poor ventilation. (Before air ducting work,  
check whether value of fan speed, static pressure  
and duct resistance are correct.)  
5-EN  
– 5 –  
Installation Manual  
Under Ceiling Type  
2
Removing wire guard  
Remove the screws (2 pcs.) which are fixing the  
wire guard.  
Remove the clamp fixing screws and remove the  
wire guard.  
Wireless remote control  
Decide the position which remote control is operated  
and the installation place.  
And then refer to the Installation Manual of the wireless  
remote controller kit sold separately.  
Clamps  
(The signal of the wireless type remote control can be  
received within approx. 23’ (7 m). This distance is a  
criterion and varies a little according to capacity of the  
battery, etc.)  
• To prevent malfunction, select a place where is not  
affected by a fluorescent lamp or direct sunlight.  
• Two or more (up to 6 units) wireless-type indoor units  
can be set in a room.  
Screw  
CAUTION  
Attach back the wire guard once indoor unit is installed.  
Remove the 2 screws fixing the wire guard and hung the  
wire guard with the clamps during a service.  
Before installation  
1
Removal of suction grille  
Slide the suction grille fixing knobs (2 positions)  
toward the arrow direction, and then open the  
suction grille.  
Under the condition of suction grille opened, push  
the hook section of hinges (2 positions) at the rear  
side, and then pull out the suction grille.  
Wire guard  
Suction grille  
fixing knob  
Suction grille  
Hinge  
Pull out suction grille  
while pushing hook.  
EN  
– 6 –  
6-EN  
Installation Manual  
Under Ceiling Type  
3
Removal of side panel  
After removing the side panel fixing screws (1  
each at right and left), slide the side panel forward  
and then remove it.  
Protector  
Side panel  
Level louver  
Slide forward.  
4
5
Removal of protective vinyl  
Peel out the protective vinyl on the level louver.  
Removal of protector  
Remove the protector (1 pcs.) of the fan.  
(RAV-SP240CT only)  
External view  
REQUIREMENT  
Strictly comply with the following rules to prevent  
damage of the indoor units and human injury.  
• Do not put a heavy article on the indoor unit. (Even  
units are packaged)  
• Carry in the indoor unit as it is packaged if possible.  
If carrying in the indoor unit unpacked by necessity,  
be sure to use buffering cloth, etc. to not damage  
the unit.  
• Do not apply force to the other parts (refrigerant  
pipe, drain pan, foamed parts, or resin parts, etc.).  
• Carry the package by two or more persons, and do  
not bundle it with plastic band at positions other  
than specified.  
7-EN  
– 7 –  
Installation Manual  
Unit: in (mm)  
Under Ceiling Type  
1.5” (39)  
2.0” (52)  
6.6” (167)  
8.5” (216)  
Upper pipe draw-out port (knockout)  
Pipe draw-out port  
(knockout)  
8.3” (210)  
Hole for remote control wires (knockout)  
4.3” (110)  
3.0” (76)  
Conduit hole  
(Hole for power supply cable. knockout)  
Drain port VP20  
(Inner dia. Ø1.0” (26), hose  
attached)  
4.1” (105)  
3.3” (84)  
Refrigerant pipe  
(Liquid side ØC)  
Left drain size  
Refrigerant pipe (Gas side ØD)  
Drain pipe  
connecting  
port  
B (Hanging position)  
3.0” (75)  
3.8” (97)  
5.7” (146)  
Hole for remote control wires  
13.7” (347)  
12.2” (311)  
Conduit hole  
(knockout)  
5.3” (135)  
10.3” (262)  
3.3” (84)  
Hanging bolt  
Pipe hole on wall  
(Ø3.9” (100) hole)  
Hole for power supply cable  
Left drain pipe  
draw-out port  
(knockout)  
Ceiling surface  
Unit  
Outside air take-in port (Duct sold separately)  
Knockout hole Ø3.6” (92))  
Wireless sensor  
mounting section  
A
Unit: in (mm)  
Model name  
180CT  
A
B
C
D
35.8”  
(910)  
33.7”  
(855)  
Ø1/4”  
(6.4)  
Ø1/2”  
(12.7)  
46.5”  
(1180)  
44.3”  
(1125)  
240CT  
Ø3/8”  
(9.5)  
Ø5/8”  
(15.9)  
300CT, 360CT  
to 420CT  
62.8”  
(1595)  
60.6”  
(1540)  
Considering pipe/wire connecting work inside the ceiling after the indoor unit has been hanged, select an  
installation place and determine piping direction.  
• If the ceiling has already been set before hanging the main unit, prepare refrigerant pipe, drain pipe, indoor  
connecting wire, remote control cord, etc. up to the place where pipe and wire can be connected.  
• Check the size of the indoor unit, and match the indoor unit size using the attached installation pattern.  
EN  
8-EN  
– 8 –  
Installation Manual  
Under Ceiling Type  
Using attached installation pattern  
Pipe knockout hole  
• Piping from rear side  
Ceiling surface  
Wall face  
* Cut off the groove section with a plastic cutter, etc.  
Rear cover  
Installation pattern  
100  
Opened when  
Using the pattern, positioning of the hanging bolt and  
pipe hole can be performed.  
* As an error to some degree may generate on the  
pattern size due to temperature and humidity, be  
sure to confirm the size.  
refrigerant pipe is  
Grooves  
taken out from the  
rear side  
Opened when only drain pipe is  
taken out from the rear side  
Installation of hanging bolts  
Use 3/8” (M10) hanging bolts (4 pcs, to be local  
procure).  
• Piping from right side  
* Cut off the groove section with a metal saw or  
plastic cutter, etc.  
Matching to the existing structure, set pitch according  
to size in the unit external view as shown below.  
Groove  
New concrete slab  
Install the bolts with insert brackets or anchor bolts.  
Rubber  
Side panel (Right side)  
Anchor bolt  
(Slide type  
• Piping from left side  
Taking pipe from left side is applied only to the  
drain pipe.  
(Blade type  
bracket)  
(Pipe hanging  
anchor bolt)  
bracket)  
The refrigerant pipe cannot be taken out from the  
left side.  
* Cut off the groove section with a metal saw or  
plastic cutter, etc.  
Steel flame structure  
Use existing angles or install new support angles.  
Hanging bolt  
Hanging bolt Support angle  
Existing concrete slab  
Use a hole-in anchors, hole-in plugs, or a hole-in bolts.  
Side panel (Left side)  
Groove  
Piping from upper side  
Taking pipe from upper side is applied only to  
the refrigerant pipe.  
When taking out the drain pipe from the upper  
side, use a drain up kit sold separately.  
Open the upper pipe draw-out port (Knockout hole)  
shown in the external view.  
Draw-out direction of pipe/  
wire  
(Knockout hole of thin plate)  
After piping, cut off the attached thermal insulator of  
the top plate to pipe shape, and then seal the  
knockout hole.  
• Decide installation place of the unit and draw-out  
direction of pipe and wire.  
9-EN  
– 9 –  
Installation Manual  
Under Ceiling Type  
(2) Hang the unit to the hanging bolt as shown the  
figure below.  
Installation of indoor unit  
• Preparation before holding down main unit  
* Confirm the presence of the ceiling material  
beforehand because the fixing method of hanging  
metal when the ceiling material is set differs from  
that when the ceiling material is not set.  
There is ceiling material  
Hanging bolt  
(Procured locally)  
(3) As shown in the figure below, fix the ceiling material  
securely with the double nuts.  
Ceiling surface  
Indoor  
unit  
Washer (Accessory)  
Double nut  
(Procured locally)  
Hanging metal  
Hanging bolt  
(Procured locally)  
Nut  
REQUIREMENT  
(Procured locally)  
Ceiling surface  
• The ceiling surface may not be horizontal. Be  
sure to confirm that width and depth directions  
are level.  
Indoor  
unit  
Washer (Accessory)  
Double nut  
(Procured locally)  
Hanging metal  
Installation of remote control  
(Sold separately)  
* Tighten the hanging metal with upper/lower nuts  
as shown in the figure.  
For installation of the wired remote control, follow the  
Installation Manual attached with the remote control.  
• Pull out the remote control cord together with the  
refrigerant pipe or drain pipe.  
Be sure to pass the remote control cord through  
upper side of the refrigerant pipe and drain pipe.  
• Do not leave the remote control at a place exposed  
to the direct sunlight and near a stove.  
• Operate the remote control, confirm that the indoor  
unit receives a signal surely, and then install it.  
(Wireless type)  
There is no ceiling material  
Hanging bolt  
(Procured locally)  
Washer  
(Procured locally)  
Indoor  
unit  
Washer (Accessory)  
Double nut  
(Procured locally)  
• Holding down of main unit  
(1) Attach washer and nuts to the hanging bolt.  
• Keep 3’3” (1 m) or more from the devices such as  
television, stereo, etc.  
(Disturbance of image or noise may generate.)  
(Wireless type)  
Ceiling surface  
Double nut  
(Procured locally)  
Washer  
(Accessory)  
Hanging bolt  
EN  
– 10 –  
10-EN  
Installation Manual  
Under Ceiling Type  
4 REFRIGERANT PIPING AND EVACUATING  
Refrigerant Piping  
Permissible Piping Length  
and Height Difference  
They vary according to the outdoor unit.  
For details, refer to the Installation Manual attached to  
the outdoor unit.  
• The connecting sections of the refrigerant pipes are  
provided at the positions in the figure below.  
* When using the drain  
Upper side  
Rear side  
pump kit sold separately,  
the pipe can be drawn out  
only from the upper side.  
Flaring  
Right  
• Cut the pipe with a pipe cutter.  
Remove burrs completely.  
Remaining burrs may cause gas leakage.  
• Insert a flare nut into the pipe, and flare the pipe.  
As the flaring sizes of R410A differ from those of  
refrigerant R22, the flare tools newly manufactured  
for R410A are recommended.  
1. Use copper pipe with 0.03” (0.8 mm) or more  
thickness.  
However, the conventional  
tools can be used by adjusting  
projection margin of the  
copper pipe.  
B
(In case pipe size is Ø5/8” (15.9 mm), with 0.04” (1.0  
mm) or more.)  
2. Flare nut and flare works are also different from  
those of the conventional refrigerant.  
Take out the flare nut attached to the main unit of the  
air conditioner, and use it.  
Projection margin in  
flaring: B (Unit: in (mm))  
Rigid (Clutch type)  
REQUIREMENT  
Outer dia. of  
R410A tool used  
copper pipe  
Conventional  
tool used  
When the refrigerant pipe is long, provide support  
brackets at intervals of 8’2” - 9’10” (2.5 - 3 m) to clamp  
the refrigerant pipe. Otherwise, abnormal sound may  
be generated.  
1/4” - 5/8”  
0 - 0.02”  
(0 - 0.5)  
0.04” - 0.06”  
(1.0 - 1.5)  
(6.4 - 15.9)  
Imperial  
Outer dia. of copper pipe  
(Wing nut type)  
0.06” - 0.08” (1.5 - 2.0)  
0.08” - 0.1” (2.0 - 2.5)  
CAUTION  
1/4” (6.4) or 3/8” (9.5)  
IMPORTANT 4 POINTS FOR PIPING WORK  
1. Remove dust and moisture from the inside of the  
connecting pipes.  
2. Tight connection (between pipes and unit)  
3. Evacuate the air in the connecting pipes using  
VACUUM PUMP.  
1/2” (12.7) or 5/8” (15.9)  
Flaring dia. meter size: A (Unit: in (mm))  
+0  
Outer dia. of copper pipe  
1/4” (6.4)  
A
-0,02" (–0.4)  
0.36” (9.1)  
0.52” (13.2)  
0.65” (16.6)  
0.78” (19.7)  
4. Check the gas leakage. (Connected points)  
3/8” (9.5)  
1/2” (12.7)  
5/8” (15.9)  
Pipe size  
* In case of flaring for R410A with the  
conventional flare tool, pull it out approx.  
0.02” (0.5 mm) more than that for R22 to  
adjust to the specified flare size.  
The copper pipe gauge is useful for  
adjusting projection margin size.  
A
SP240,SP300,  
Model  
name  
SP180  
type  
RAV-  
SP360, SP420  
type  
1/2"  
(12.7 mm)  
5/8"  
(15.9 mm)  
Gas side  
Pipe size  
1/4"  
(6.4 mm)  
3/8"  
(9.5 mm)  
Liquid side  
11-EN  
– 11 –  
Installation Manual  
Under Ceiling Type  
Tightening connection  
Evacuation  
Using a vacuum pump, perform vacuuming from the  
charge port of valve of the outdoor unit.  
For details, follow to the Installation Manual attached to  
the outdoor unit.  
CAUTION  
• Do not apply excessive torque. Otherwise, the nut  
may crack depending on the conditions.  
• Never use the refrigerant sealed in the outdoor unit  
for air purge.  
(Unit: ft•lbs (N•m))  
Outer dia. of copper  
Tightening torque  
pipe  
REQUIREMENT  
For the tools such as charge hose, etc., use those  
manufactured exclusively for R410A.  
1/4” (6.4 mm)  
3/8” (9.5 mm)  
1/2” (12.7 mm)  
5/8” (15.9 mm)  
10 -13 (14 - 18)  
24 - 31 (33 - 42)  
37 - 46 (50 - 62)  
46 - 57 (63 - 77)  
Refrigerant amount to be added  
For addition of the refrigerant, add refrigerant “R410A”  
referring to the attached Installation Manual of outdoor  
unit.  
Be sure to use a scale to charge the refrigerant of  
specified amount.  
Tightening torque of flare pipe connections  
Pressure of R410A is higher than that of R22.  
(Approx. 1.6 times)  
Therefore, using a torque  
wrench, tighten the flare pipe  
connecting sections which  
connect the indoor and  
Flare at  
indoor  
unit side  
REQUIREMENT  
• Charging an excessive or too little amount of  
refrigerant causes a trouble of the compressor.  
Be sure to charge the refrigerant of specified  
amount.  
• A personnel who charged the refrigerant should  
write down the pipe length and the added  
refrigerant amount in the nameplate attached to the  
service panel of the outdoor unit. It is necessary to  
troubleshooter the compressor and refrigeration  
cycle malfunction.  
outdoor units of the specified  
tightening torque.  
Incorrect connections may  
cause not only a gas leak, but  
also a trouble of the  
refrigeration cycle.  
Align the centres of the connecting pipes and tighten  
the flare nut as far as possible with your fingers. Then  
tighten the nut with a spanner and torque wrench as  
shown in the figure.  
Flare at  
outdoor  
unit side  
Half union  
Flare nut  
Open the valve fully  
Open the valve of the outdoor unit fully.  
For details, refer to the Installation Manual attached to  
the outdoor unit.  
Internally  
Externally  
threaded side  
threaded side  
Use a wrench to secure.  
Use a torque wrench to tighten.  
REQUIREMENT  
Gas leak check  
Tightening with an excessive torque may crack the nut  
depending on installation conditions.  
Tighten the nut within the specified tightening torque.  
Check with a leak detector or soap water whether gas  
leaks or not, from the pipe connecting section or cap of  
the valve.  
REQUIREMENT  
Piping with outdoor unit  
Use a leak detector manufactured exclusively for HFC  
refrigerant (R410A, R134a, etc.).  
• Shape of valve differs according to the outdoor unit.  
For details of installation, refer to the Installation  
Manual of the outdoor unit.  
EN  
– 12 –  
12-EN  
Installation Manual  
Under Ceiling Type  
Thermal insulation process  
Apply thermal insulation for the pipes separately at  
liquid side and gas side.  
For the thermal insulation to the pipes at gas side, be  
sure to use the material with heat-resisting  
temperature 248 °F (120 °C) or higher.  
Using the attached thermal insulation material, apply  
the thermal insulation to the pipe connecting section of  
the indoor unit securely without gap.  
REQUIREMENT  
• Apply the thermal insulation to the pipe connecting  
section of the indoor unit securely up to the root  
without exposure of the pipe. (The pipe exposed to  
the outside causes water leak.)  
• Wrap heat insulator with its slits facing up (ceiling  
side).  
Wrap the pipe with the attached heat insulator  
without any gap between the indoor unit.  
Indoor unit  
The seam must be faced upward  
(ceiling side).  
Heat insulator  
of the pipe  
Flare nut  
Heat insulation  
pipe  
(Accessory)  
Union  
13-EN  
– 13 –  
Installation Manual  
Under Ceiling Type  
5 DRAIN PIPING WORK  
• Set the collective piping as shown in the below  
figure.  
CAUTION  
As long as possible  
(3.9” (100 mm))  
Following the Installation Manual, perform the  
drain piping work so that water is properly  
drained, and apply a heat insulation so as not to  
cause a dew dropping.  
VP20  
VP20  
VP20  
Extended  
ventilating  
pipe  
Inappropriate piping work may result in water  
leakage in the room and wet of furniture.  
VP30 or more  
Downward slope  
1/100 or more  
<Collective piping>  
Piping/Heat insulating  
material  
Require the following materials for piping and heat  
insulating at site.  
• Be sure not to apply force to the connecting part of  
the drain pipe.  
• The hard vinyl-chloride pipe cannot be directly  
connected to the drain pipe connecting port of the  
indoor unit.  
For connection with the drain pipe connecting port,  
be sure to use/fix the attached flexible hose with the  
hose band, otherwise a damage or water leak is  
caused on the drain pipe connecting port.  
Hard vinyl chloride pipe VP20  
Piping  
(Outer dia.: Ø1.0” (26 mm))  
Foam polyethylene:  
Heat insulator  
Thickness 0.4” (10 mm) or more  
Drain pipe connecting  
Attached flexible hose  
port (Hard socket)  
REQUIREMENT  
• Be sure to perform heat insulation of the drain pipes  
of the indoor unit.  
Attached hose band  
Attached hose band  
• Never forget to perform heat insulation of the connecting  
part with the indoor unit.  
An incomplete heat insulation causes dew dropping.  
Drain pan  
• Set the drain pipe with downward slope (1/100 or  
more), and do not make swelling or trap on the  
piping. It may cause an abnormal sound.  
Soft socket  
Soft socket  
• For length of the traversing drain pipe, restrict 65’7”  
(20 m) or less.  
Adhesive agent  
VP20 vinyl chloride pipe  
(procured locally)  
prohibited  
In case of a long pipe, provide support brackets with  
interval of 4’11” - 6’7” (1.5 - 2 m) in order to prevent  
waving.  
Adhesive inhibited:  
Use the attached flexible hose and hose band for  
connecting the drain hose to the clear drain socket.  
If applying the adhesive, socket will be damaged and  
cause water leakage.  
4’11” - 6’7” (1.5 - 2 m)  
Support  
bracket  
1/100 or more  
downward  
Thermal insulator  
Drain up  
NO  
Arched shape  
When not securing down slope on the drain pipe, use  
a Drain pump kit sold separately.  
GOOD  
Also refer to the “Drain pump kit installation manual”.  
The drain pipe can be raised 23.6” (600 mm) from the  
top face of the main unit.  
Trap  
EN  
* When using Drain pump kit, both drain pipe and  
refrigerant pipe can be taken only from upper side.  
* VP25 PVC pipe is needed when a drain pump is  
used.  
– 14 –  
14-EN  
Installation Manual  
Under Ceiling Type  
Connection of drain hose  
Connection of drain pipe  
• Insert the attached drain hose into the drain pipe  
connecting port on the drain pan up to the end.  
• Fit the attached hose band to the end of the pipe  
connecting port, and then tighten it securely.  
• Connect the hard vinyl chloride pipe (procured  
locally) to the mounted drain hose which was  
attached.  
• Piping from left side  
• In case of taking pipe from the left side, exchange  
the plug from left to right. Push in the plug of which  
end is not sharp up to the end.  
REQUIREMENT  
• Be sure to fix the drain hose with the attached hose  
band, and set the tightening position upward.  
Drain pan  
• As the draining is the natural water draining,  
arrange the pipe outside of the unit on the down  
slope.  
• If piping is performed as shown in the figure, drain  
cannot be discharged.  
Plug  
NO GOOD  
Refrigerant pipe  
Drain pipe  
Drain pipe  
Fit the attached hose band to the end of the hose, lay  
down the knob, and then tighten hose band.  
Drain pan  
Attached drain hose  
Confirm that soft hose is pushed  
in up to the end of the drain pan.  
Thermal insulating process  
• Using the attached drain hose thermal insulator, lap  
the connecting section and the drain hose without  
clearance, and then tighten with two handing band  
so that thermal insulator does not open.  
• Covering the attached drain hose thermal insulator,  
lap the thermal insulator (procured locally) to the  
drain pipe without clearance.  
Lap covering connecting section  
Thermal insulator  
between drain pan and drain hose.  
(procured locally)  
Drain hose  
Drain  
pan  
Lap the attached  
thermalinsulation  
so that the one  
end is put on the  
other end at the  
upper side.  
Hose band Banding band Hose band  
Attached thermal insulator  
* Tighten the banding band so that  
attached thermal insulator is not  
pushed excessively.  
15-EN  
– 15 –  
Installation Manual  
Under Ceiling Type  
6 ELECTRICAL CONNECTION  
REQUIREMENT  
WARNING  
• For power supply wiring, strictly conform to the  
Local Regulation in each country.  
• For wiring of power supply of the outdoor units,  
follow the Installation Manual of each outdoor unit.  
1. Using the specified wires, ensure to connect the  
wires, and fix wires securely so that the external  
tension to the wires do not affect the connecting  
part of the terminals.  
Incomplete connection or fixation may cause a fire,  
etc.  
• Never connect 208/230 V power to the terminal  
blocks (A, B etc.) for control wiring.  
(Otherwise, the system will fail.)  
• Perform the electric wiring so that it does not come  
to contact with the high-temperature part of the  
pipe.  
The coating may melt resulting in an accident.  
• Run the refrigerant piping line and control wiring line  
in the same line.  
• Do not turn on the circuit breaker of the indoor unit  
until vacuuming of the refrigerant pipes completes.  
2. Be sure to connect ground wire. (grounding work)  
Incomplete grounding cause an electric shock.  
Do not connect ground wires to gas pipes, water  
pipes, lightning rods or ground wires for telephone  
wires.  
3. Appliance shall be installed in accordance with  
national wiring regulations.  
Capacity shortage of circuit breaker or incomplete  
installation may cause an electric shock or a fire.  
CAUTION  
Remote control wiring  
• Consult local building codes, NEC (National Electrical  
Code) or CEC (Canadian Electrical Code) for special  
requirements.  
• This indoor unit has no power cord.  
• If incorrect/incomplete wiring is carried out, it will  
cause an electrical fire or smoke.  
• Be sure to install circuit breaker is not tripped by shock  
waves.  
If circuit breaker is not installed, an electric shock may  
be caused.  
• Be sure to use the cord clamps attached to the  
product.  
• Do not damage or scratch the conductive core and  
inner insulator of power and system interconnection  
wires when peeling them.  
• Use the power cord and system interconnection wire  
of specified thickness, type, and protective devices  
required.  
• For single system, use 2 x AWG20 non polarity wire  
is used for the remote control wiring.  
Wiring  
1. Connect the connecting wire to the terminal as  
identified with their respective numbers on the  
terminal block of indoor and outdoor unit.  
(4 x AWG12)  
2. Insulate the unsheathed redundant cords  
(conductors) with electrical insulation tape.  
Process them so that they do not touch any electrical  
or metal parts.  
3. For inter-unit wiring, do not use a wire jointed to  
another on the way.  
Wire Quantity x size  
1
Indoor unit - Outdoor unit *  
Ground  
3 x AWG12 (polar)  
1 x AWG12 or thicker  
2 x AWG20 (non-polar)  
Remote control  
1
* :Length of the system interconnection wires.  
SP300AT2 -  
SP420AT2  
RAV-  
SP180AT2 SP240AT2  
Wire  
length  
164’1” (50  
m) or less  
229’8” (70  
m) or less  
246’1” (75 m) or  
less  
EN  
– 16 –  
16-EN  
Installation Manual  
Under Ceiling Type  
CAUTION  
Use the same size wire for the field power supply wire  
and system interconnection wires when the outdoor unit  
is RAV-SP180AT2.  
NOTE  
• Use copper supply wires.  
• Use UL wires rated 600 V for the system  
interconnection wires.  
• Use UL wires rated 300 V for the remote control  
wires.  
17-EN  
– 17 –  
Installation Manual  
Under Ceiling Type  
Wire connection  
REQUIREMENT  
• Be sure to connect the wires matching the terminal numbers. Incorrect connection causes a trouble.  
• The low-voltage circuit is provided for the remote control. (Do not connect the high-voltage circuit)  
• Loosen the cover mounting screws (2 positions) of the electric parts box, and then remove the cover.  
• Attach the conduit pipe to the conduit hole with a lock nut.  
• Slit the film of bushing attached to the hole for remote control wire, and then pass through wires.  
• Connect the system interconnection wires and the remote control wire to the terminal block of the electric parts  
box. Secure the ground wire with the ground screw.  
• Tighten screws of the terminal block securely, and fix the wires with code clamp attached to the electric parts  
box. (Do not apply tension to the connecting section of the terminal block.)  
• Mount the cover of the electric parts box so that it does not pinch the wires.  
Two screws  
Electric parts box  
Terminal block  
P.C. board  
Conduit hole  
Terminal block for  
wired remote  
control  
Terminal block for system  
interconnection  
Ground screw  
System interconnection  
wires and ground wire  
A
B
L1  
L2  
S
Cord clamp  
Remote control wires  
Wire partition plate  
Pass the remote control wire through the  
hole for remote control wire and behind  
this wire partition plate.  
Hole for Remote control wires  
EN  
18-EN  
– 18 –