Gree MULTI21 CAS12HP230V1AC User manual

CEILING CASSETTE
DUCTLESS SYSTEM
INSTALLATION MANUAL
Models:
CAS12HP230V1AC -12,000 BTUH
CAS18HP230V1AC -18,000 BTUH
CAS24HP230V1AC - 24,000 BTUH

Thank you for choosing the Gree Ceiling Cassette for
your Ductless Heat Pump System
Please read this installation manual carefully before installing and starting up the Ductless System with
Ceiling Cassettes. Take a moment to fill out the product and installation form on the back cover. Retain
both the manual and installation record for future reference.
Table of Contents.
Safety Precautions 3
System Requirements 4
Nomenclature 4
Suggested Tools 5
Product Dimensions 6
Product Overview 7
Installation of Ceiling Cassette 8
Installation of Refrigerant Piping 10
Installation of Condensate Piping 12
Installation of Power & Wiring 13
Installing of Wired Controller 14
Installing of Decorative Grille 16
Start Up and Check Out 18
Troubleshooting 19
2

GENERAL SAFETY PRECAUTIONS
Please read the following before installation
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.
WARNINGsignifies 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
Heat pumps, air conditioners & heating equipment should be installed, started up, and serviced
only by qualified installers and/or service technicians. Air conditioning, heat pumps and
refrigeration systems are hazardous due to high voltage electrical components, high refrigerant
pressures, and moving parts.
WARNING
ELECTRICAL SHOCK HAZARD
Failure to follow this warning could result in personal injury or death.
Before installing, servicing or modifying the system, the main electrical disconnect switch must be
in the OFF position. There may be more than one disconnect switch. Lock out and tag all
switches with a warning label.
General Safety Precautions
•A dedicated power supply circuit should be used in accordance with local electrical safety
regulations and National Electrical Codes (NEC).
•Ensure that the entire system is reliably grounded.
•Use proper size circuit breaker to protect equipment against short circuit and overload conditions.
•The system must be positioned at least 5 feet from flammable combustive liquids.
• Observe all local codes and regulations.
NOTE: Your actual equipment and related devices may differ from the images shown in this manual.
This appliance is not intended for use by children without responsible adult supervision. Proper care
should be taken to ensure safety.
3

SYSTEM REQUIREMENTS
PIPE SIZE:
Model # Capacity
Size (Btu) Voltage Liquid Line Suction/Gas Line Net/Gross Weight
CAS12HP230V1AC
12,000
208/230 - 1ph 60 hz
1/4-in (6mm)
3/8-in (9.5mm)
44/51 lbs.
CAS18HP230V1AC
18,000
208/230 - 1ph 60 hz
1/4-in (6mm)
1/2-in (12-mm)
48/55 lbs.
CAS24HP230V1AC
24,000
208/230 - 1ph 60 hz
3/8-in (9.5mm)
5/8-in (16-mm)
66/84 lbs.
INTERCONNECTING CABLE:
Recommended 14/4 AWG stranded bare copper conductors THHN 600V unshielded wire
Note:Use shield cable if installation is in close proximity of RF and EMI transmitting devices.
CONDENSATE DRAINAGE:
Recommended condensate drainage system use pipe either the same diameter or with the diameter
larger (excluding the raising section) than that of the connecting pipe (nominal diameter 1-in, outside
diameter 1-1/4-in.)
Note:Insulate condensate all condensate drain pipes to prevent sweating and possible water damage.
NOMENCLATURE:
Series Designation Product Type
S - System
O - Outdoor units
CAS - Ceiling Cassette H - Indoor High Wall
D - Indoor Duct
C - Indoor Cassette
Cooling Capacity F - Indoor Floor/Ceiling
12 - 12,000 BTUH
18 - 18,000 BTUH Revision Level
24 - 24,000 BTUH
(ect..) Style/Color Designation
Model Type
AC -Cooling Only Electrical Rating
HP -Heat Pump 230V - 208/230V 60Hz 1PH
HC - Heat/Cool 115V - 115V 60Hz 1PH
Example: CAS18HP230V1AC
CAS
42
HP
230V
1
A
C
4

SUGGESTED TOOLS
Standard Wrench
Adjustable/Crescent Wrench
Torque Wrench
Hex Keys or Allen Wrenches
Drill & Drill Bits
Hole Saw
Pipe Cutter
Screwdrivers(Phillips&Flatblade)
Manifold and Gauges
Level
R410A Flaring Tool
Clamp on Amp Meter
Vacuum Pump
Safety Glasses
Work Gloves
Refrigerant Scale
Micron Gauge
5

PRODUCTS DIMENSIONS
Ceiling Cassette Dimensions Units: Inch (mm)
Minimum Indoor Clearance
Units: Inch (mm)
6

PRODUCT OVERVIEW
XK-19 Tether
Wired Controller
Remote
Controller
7

INSTALLATION OF CEILING CASSETTE
Step 1 - Selecting Location for Ceiling Cassette Unit
Select a location that allows for the following:
•Ensure the installation complies with the installation minimum dimensions and meets the
minimum and maximum connecting piping length and maximum change in elevation.
•Air inlet and outlet will be clear of obstructions, ensuring proper airflow throughout the room.
•Condensate can be easily and safely drained.
•All connections can be easily made to outdoor unit.
•Indoor unit is out of reach of children.
•A ceiling strong enough to withstand four (4) times the full weight and vibration of the unit.
•Filter can be easily accessed for cleaning.
•Leave enough free space to allow access for routine maintenance.
•Install at least 10 ft. (3 m) away from the antenna of TV set or radio. Operation of the air
conditioner may interfere with radio or TV reception in areas where reception is weak. An
amplifier may be required for the affected device.
•Do not install in a laundry room or by a swimming POOL.
•The location meets all the minimum clearance dimensions and the requirements of the schematic
diagram.
Step 2-Laying Out Location
•Locate the factory supplied installation template included in carton.
•Use the template to make an opening in the ceiling for the ceiling cassette main body.
•Mark the position of the hanger bolts, refrigerant lines and condensate drain pipes,
interconnecting cable and wired remote controller wires ( if applicable).
.
8

INSTALLATION OF CEILING CASSETTE
Step 3 – Installation of Mounting Hangers
Depending on the type of ceiling, attached the threaded hanger bolts (field supplied) securely to the
ceiling or support stud.
Before lifting Ceil Cassette unit to the installation location, insert the upper nuts, flat washers (with
insulation), flat washers (without insulation), lower nuts and locking nut (double) on the threaded hanger
bolts as show in diagram.
Note: Fit the washer with cushion so that the insulation faces downward.
Step 4 - Installation of Ceiling Cassette
Lift the Ceiling Cassette main body unit to the threaded hanger bolts. Insert the unit mounting brackets
between washers and then fasten it securely.
Step 5 - Confirming Position of Ceiling Cassette
1. Adjust height of Ceiling Cassette main body to align with false ceiling. Be sure to confirm this,
otherwisecondensation may form due to air leakage, etc. Adjust mounting nuts as needed.
2. Confirm that the Ceiling Cassette main body is horizontally leveled. Adjust mounting nuts as
needed.
3. After checking the positioning of the Ceiling Cassette main body, tighten the nuts of the hanger
bolts securely to fasten the Ceiling Cassette main body in place.
4. The installation template may be used as a protective sheet toprevent dust from entering the
Ceiling Cassette when the decorative grilles are left unattached during the installation.
9

INSTALLATION OF REFRIGERANT PIPING
Step 6 – Drill Hole in Wall
1. Find and mark the proper location for the wall hole. Use the table below for the recommended
wall hole size.
Model # Capacity Size
(Btuh)
Wall Hole Size (Diameter)
in
mm
CAS12HP230V1AC
12,000
2 1/4
55
CAS18HP230V1AC
18,000
2 3/4
66
CAS24HP230V1AC
18,000
2 3/4
66
2.
Cut the wall hole with a 5° to 10° downward slant to the outdoors.
3. Insert a wall sleeve into hole to prevent damage to refrigerant pipes, insulation, condensate drain
hose and wiring.
4. Proper weather proofing of the wall surface and wall sleeve is essential to assure a trouble-free
installation. Apply sealant, caulking or equivalent weather proofing material around the perimeter
of the wall sleeve (interior & exterior) to eliminate outdoor air and water leaks into the living
space.
Note: Expandable foam insulation may be added to fill large wall gaps. Apply per manufacturer's
instructions.
Wall Hole Diagram
10