Pioneer Inverter+ WAS Series User manual

CS78421-548-754
DUCTLESS MINI SPLIT SYSTEM AIR CONDITIONER / HEAT PUMP
IMPORTANT NOTICE:
Please read this manual carefully before installing
or operating your new air conditioning system.
Make sure to save this manual for future reference.
Installation
Manual
WAS / WYS Series
WAS: Cooling Only Version
WYS: Cooling and Heating Version
Inverter+ and Inverter++ Models
9,000 BTU/h. through 36,000 BTU/h.
®®

Table of Contents
Installation Manual
Indoor Unit Installation........ 11
1. Select installation location.......................... 11
2. Attach mounting plate to wall....................
12
3. Drill wall hole for connective piping............
12
4. Prepare refrigerant piping...........................
14
5. Connect drain hose....................................
15
6. Connect signal cable..................................
17
7. Wrap piping and cables..............................
18
8. Connect indoor power wire.......................
18
9. Mount indoor unit.....................................
18
Outdoor Unit Installation...
20
8
1. Select installation location.................. 20
2. Install drain joint................................
21
3. Anchor outdoor unit..........................
22
4. Connect signal and power cables....... 23
Safety Precautions........................... 4
0
1
5
Accessories........................................ 6
2
4
Unit Parts.......................................... 10
3
Installation Summary - Indoor Unit........

Refrigerant Piping Connection........ 25
A. Note on Pipe Length................................................ 25
B. Connection Instructions –Refrigerant Piping............. 25
1. Cut pipe..............................................................
25
2. Remove burrs......................................................
26
3. Flare pipe ends....................................................
26
4. Connect pipes.....................................................
27
Air Evacuation................... 29
1. Evacuation Instructions...................... 29
2. Note on Adding Refrigerant............... 30
Electrical and Gas Leak Checks........ 31
Test Run............................................ 32
European Disposal Guidelines........ 34
6
7
8
9
10
MC MC

Page 4 
This symbol indicates that ignoring instructions may cause death or serious
injury.
This symbol indicates that ignoring instructions may cause moderate injury
to your person, or damage to your unit or other property.
Safety Precautions
Read Safety Precautions Before Installation
Incorrect installation due to ignoring instructions can cause serious damage or injury.
The seriousness of potential damage or injuries is classified as either a WARNING or CAUTION.
WARNING
CAUTION
WARNING
Do not use smaller than specied gauge wiring or an extension cable to power the system.
Do not
Do not
share the electrical circuit with other appliances. Improper or insucient power supply
can cause re, electrical shock or undesirable operation.
When connecting refrigerant piping, do not let substances or gases other than the specied
refrigerant enter the unit. The presence of other gases or substances will lower the unit’s capacity,
and can cause abnormally high pressure in the refrigeration cycle. This can cause explosion and
injury,as well as permament equipment failure. Remember : No Dust, Humidity or Air should be allowed to enter.
allow children to play with the air conditioner. Children must be supervised around the
unit at all times.
1. Installation must be performed by a licensed and trained technician. Defective installation can
cause water leakage, electrical shock, or re. Proper tools are also needed,
2. Installation must be performed according to the installation instructions. Improper installation can
cause water leakage, undesired performance, electrical shock, or re.
(In North America, installation must be performed in accordance with the requirement of NEC and
CEC by authorized personnel only.)
3.
Contact a qualied and licensed HVAC technician for repair or maintenance of this unit.
4.
Only use the included accessories, parts, and specied parts for installation. Using non-standard
parts can cause water leakage, electrical shock, re, and can cause the unit to fail.
5. Install the unit on a rm location that can support the unit’s weight. If the chosen location cannot
support the unit’s weight, or the installation is not done properly, the unit may fall and cause
serious injury and damage.
This symbol indicates that you must never perform the action indicated.

Page 5 
WARNING
6. For all electrical work, follow all local and national wiring standards, regulations, and the
Installation Manual. You must use an independent circuit and a dedicated breaker to supply power.
Do not connect other appliances to the same circuit. Insucient electrical capacity or defects in
electrical work can cause electrical shock or re.
7. For all electrical work, use the specied cables. Connect cables tightly, and clamp them securely to
prevent external forces from damaging the terminals. Improper electrical connections can overheat
and cause re, and may also cause shock.
8.
9.
10.
11.
All wiring must be properly arranged to ensure that the control board cover can close properly. If
the control board cover is not closed properly, it can lead to corrosion and cause the connection
points on the terminal to heat up, catch re, or cause electrical shock.
This appliance can be used by children aged from 8 years and above and persons with reduced
Physical, sensory or mental capabilities or lack of experience and knowledge if they have been given
supervision or instruction concerning use of the appliance in a safe way and understand the hazards
involved. Children shall not play with the appliance. Cleaning and user maintenance shall not be
attempted by children or untrained personnel without proper supervision.
CAUTION
For units that have an auxiliary electric heater, do not install the unit within 1 meter (3 feet) of
any combustible materials.
Do not install the unit in a location that may be exposed to combustible gas leaks. If combustible
gas accumulates around the unit, it may cause re.
Do not operate your air conditioner in a highly humid space such as a bathroom or laundry room.
Exposure to high humidity or water can cause electrical components to short circuit.
1. The product must be properly grounded at the time of installation, or electrical shock may occur.
2. Install drainage piping according to the instructions in this manual. Improper drainage may cause
water damage to your home and property.
Note about Fluorinated Gasses
1. This air-conditioning unit contains fluorinated gasses. For specic information on the type of gas
and the amount, please refer to the relevant label on the unit itself.
2. Installation, service, maintenance and repair of this unit must be performed by a certified HVAC
technician.
3. Product uninstallation and recycling must be performed by a certified HVAC technician.
4. If the system has a leak-detection system installed, it must be checked for leaks at least every 12
months.
5. When the unit is checked for leaks, proper record-keeping of all checks is strongly
recommended.
In certain functional environments, such as kitchens, server rooms, etc., the use of specially designed
air-conditioning units is highly recommended. This is intended as a comfort cooling system.
If the supply cord is damaged, it must be replaced by a certied service agent or similarly qualied
technicians in order to avoid a hazard.