Stealth Designer SC-30FM-UM User manual

FLOOR/CEILING
INSTALLATION ANUAL
Models:
Indoor Unit
SC-18FM-UM
SC-24FM-UM
SC-30FM-UM
SC-36FM-UM
SC-42FM-UM
SC-48FM-UM
Outdoor Unit
SC-18Z-UM
SC-24Z-UM
SC-30Z-UM
SC-36Z-UM
SC-42Z-UM
SC-48Z-UM

Safety Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
System Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Suggested Tools . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
System Schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Standard Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
nstallation Site nstructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-9
ndoor Unit nstallation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-12
Outdoor Unit nstallation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13-14
Piping nstallation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15-18
Power and Wiring nstallation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18-20
Testing and nspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21-24
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25-26
Diagnostic Codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27-29
Thank you for choosing a
Universal Floor/Ceiling
Unit for your customer.
Please read this installation manual carefully before installing and starting up the
Universal Floor/Ceiling Ductless System. 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
Please read the following before installation.
This is the safety alert symbol. t is used to alert you to potential
personal injury hazards. Obey all safety messages that follow this
symbol to avoid possible injury or death.
This mark indicates procedures which, if improperly performed,
might lead to the death or serious injury of the user.
This mark indicates procedures which, if improperly performed, might
possibly result in personal harm to the user, or damage to property.
Notice is used to address practices not related to personal injury.
General Safety Precautions
1. nstructions for installation and use of this product are provided by the manufacturer.
For proper operation, the system must be installed in accordance with this
installation manual.
2. nstallation must be performed in accordance with local laws, regulations and
National Electrical Codes (NEC).
3. f refrigerant leaks while work is being carried out, ventilate the area. Do not allow
refrigerant to come in contact with a flame as it produces toxic gas.
4. Disconnect all electrical power to the indoor and outdoor units until the system is
ready for start-up and checkout.
5. When installing or repairing the system, use only R410A refrigerant. Do not
mix refrigerant with other gases. f air or other gas enter the refrigeration system,
the pressure inside the system may rise to an abnormally high value and cause
damage or injury.
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.
WARNING
CAUTION
NOTICE
WARNING
2

SYSTE REQUIRE ENTS
REFRIGERANT CHARGE
INDOOR UNIT ELECTRICAL REQUIRE ENTS
PIPE SIZE in (mm)
Notes: nsulate both refrigerant lines, separately.
Communication Cable: Recommended cable - 18/2 AWG stranded bare copper conductors THHN 300V unshielded
wire Note: Use shield cable if installation is in close proximity of RF and EMI transmitting devices.
Unit Size
(BtuH)
18,000 1/4 (6) 1/2 (12) 10 (3) 25(7.5)
164 (50)
49 (15)
24,000 3/8 (10) 5/8 (15) 10 (3) 25(7.5)
164 (50)
49 (15)
30,000 3/8 (10) 5/8 (15) 10 (3) 25(7.5)
164 (50)
49 (15)
36,000 3/8 (10) 5/8 (15) 10 (3) 25(7.5)
164 (50)
49 (15)
42,000 3/8 (10) 5/8 (15) 10 (3) 25(7.5)
164 (50) 49 (15)
48,000 3/8 (10) 5/8 (15) 10 (3) 25(7.5)
230(70) 49 (15)
in Line
ax. Pre-Charge
ax Line ax Elevation
Length Line Length Length (ID over OD)
Liquid Suction/Gas
Line Line
Unit Size Refrigerant Factory System Additional
(BtuH) Type Charge oz (kg)* Charge oz/ft (g/m)
18,000 R410A 49.4 (1.4) 0.3 (30)
24,000 R410A 77.6 (2.2) 0.6 (60)
30,000 R410A 84.6 (2.4) 0.6 (60)
36,000 R410A 123.2 (3.5) 0.6 (60)
42,000 R410A 130.5 (3.7) 0.6 (60)
48,000 R410A 141.8 (4.0) 0.6 (60)
Unit Size Voltage in Circuit ax Overcurrent ain Power
(BtuH) Amps ( CA) Protection ( OCP) Wire Size (AWG)
18,000 208/230v - 1ph 60hz 1.0 15 14
24,000 208/230v - 1ph 60hz 1.0 15 14
30,000 208/230v - 1ph 60hz 2.0 15 14
36,000 208/230v - 1ph 60hz 2.0 15 14
42,000 208/230v - 1ph 60hz 2.0 15 14
48,000 208/230v - 1ph 60hz 3.0 15 14
OUTDOOR UNIT ELECTRICAL REQUIRE ENTS
Unit Size Voltage in Circuit ax Overcurrent ain Power
(BtuH) Amps ( CA) Protection ( OCP) Wire Size (AWG)
18,000 208/230v - 1ph 60hz 17.0 25 10
24,000 208/230v - 1ph 60hz 24.0 40 10
30,000 208/230v - 1ph 60hz 24.0 40 10
36,000 208/230v - 1ph 60hz 29.0 45 8
42,000 208/230v - 1ph 60hz 31.0 50 8
48,000 208/230v - 1ph 60hz 45.0 70 6
*Precharge amount for up to 25-ft of refrigerant pipe.
REFRIGERANT LINE LENGTHS ft (m)
4

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

6
Air inlet
SYSTEM SCHMATIC
Indoor Unit
System Components*
1. Front Cabinet
2. Air nlet
3. Wired Controller
(Optional)
4. Remote Controller
5. Drain Pipe
6. Gas Pipe
7. Liquid Pipe
8. Service Cover
9. Front Panel
Outdoor Unit
Air outlet
Air inlet
9 8
3 4
1 2
76 5
The refrigerant pipe, drain pipe and electrical wiring for this unit should be installed by a
qualified HVAC professional only.
CAUTION
Air Outlet
Power
Supply
*Not all items included with equipment purchase

7
STANDARD PARTS
Indoor Unit Accessories
Outdoor Unit Accessories
No. Name Appearance Qty Usage
1 Nut with Washer 8 Secures the hook on the
cabinet of the unit
2 Remote Controller
and Battery 1+2 Controls the indoor unit
3 Cable Clamp 4 Fastens the insulation
blanket
4 Pipe nsulation 1 nsulates the gas pipe
5 Pipe nsulation 1 nsulates the liquid pipe
6 Template 2
For drilling holes for
mounting indoor unit
7 Flare Nut 1 Connects the gas pipe
8 Flare Nut 1 Connects the liquid pipe
No. Name Appearance Qty Usage
1 Drain Plug 3 Plugs the unused drain hole
2 Drainage Connecter
or 1Connects with field supplied
drain pipe

INSTALLATION SITE INSTRUCTIONS
Indoor Unit
The unit must be installed in a location which can withstand four times the weight of the unit.
nadequate support may result in serious property damage and injuries.
Select a site 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 should 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.
• ndoor unit is out of reach of children.
• A structure strong enough to withstand four (4) times the full weight of the unit.
• Filter can be easily accessed for cleaning.
• Leave enough free space to allow access for routine maintenance.
•
Do not install in a laundry room or by a swimming pool due to chemicals corroding indoor unit coil.
8
WARNING

INSTALLATION SITE INSTRUCTIONS
Outdoor Unit
9
Do not install the unit at a location where the distance exceeds the maximum pipe length indicated
in the table. The maximum length of the connection pipe is listed in the System Requirements section.
CAUTION
WARNING
Outdoor Unit inimum Distances
in (mm)
A 40 (1000)
B 20 (500)
C 20 (500)
D 80 (2000)
E 20 (500)
Air inlet
Air outlet
A
BC D
E
The unit should be installed level on a pad that can support twice the weight of the unit.
f the outdoor unit will be exposed to strong winds, it must be adequately secured.
1.
nstall the outdoor unit at a location that is capable of withstanding twice the weight of the unit.
2. nstall the outdoor unit where it is convenient to connect refrigerant lines to the indoor unit.
3. nstall the outdoor unit where the condensate water can be drained unobstructed during the
heating mode to a safe location.
4. Do not locate the unit where the noise may be objectionable to neighbors.
5. Provide the space shown below, so that the air flow is not blocked and future service and
maintenance can be performed.
Select a site that allows the following:
inimum Outdoor Clearances

INDOOR UNIT INSTALLATION
Indoor Unit Dimensions
odel ABCDH
SC-18FM-UM
48 8 7/8 45 5/8 11 27 1/2
SC-30FM-UM
(1220) (225) (1158) (280) (700)
SC-36FM-UM
SC-42FM-UM
55 7/8 9 5/8 53 1/4 11 27 1/2
SC-48FM-UM
(1420) (245) (1354) (280) (700)
66 7/8 9 5/8 64 3/8 11 27 1/2
(1700) (245) (1634) (280) (700)
Weight (lbs)
86
88
106
106
110
130
INDOOR UNIT DI ENSIONS nches (mm)
10
Preparing Indoor Unit for Installation
1. Remove the air inlet grille from the indoor unit to access screws that secure the side panels by
unhooking grille latches and removing screws.
2. Locate and remove the screw securing right side panel.
Remove right side panel from indoor unit by sliding it
up and off as shown in the figure right.
3. Repeat procedure to remove the left side panel
Begin the indoor unit installation by removing the air inlet grille and both side panels from unit as follows:
Remove the screw
Remove the screw

1. Determine the mounting location on the wall for the indoor
unit. Follow the selection criteria in the previous section.
2. Locate the factory supplied installation template included
in carton and attach to the wall.
3. Verify the installation template is level right to left
and is a minimum 11 3/4 inches above the floor.
Mark the 4 mounting holes for the indoor
unit. Also mark the condensate drain and
refrigeration pipe hole.
NOTE: Depending on the installation, the refrigeration
pipes and condensate drain hose may exit from the rear
or bottom of the unit.
4. Drill 4 mounting holes and insert anchor bolts (field supplied)
into drilled holes.
NOTE: t is recommended to install screw anchors for sheet rock,
concrete block, brick and such type of walls.
5. Verify indoor unit mounting by carefully lifting unit and setting it
on the 4 anchor bolts using the factory provided slots on the side
brackets as shown in figure right
6. Carefully remove indoor unit from anchor bolts in order to begin
making piping connections.
NOTE: Do not reinstall air inlet grille or side panels until instructed.
The Universal Floor/Ceiling units allow for wall or ceiling
mounting. Follow the instructions for the desire type of
installation.
Wall ounting Installation
11
INDOOR UNIT INSTALLATION
Laying Out Indoor Location
Mounting
Slots
Paper Template
Paper Template
Right Side
Panel
Left Side
Panel
Wall

12
INDOOR UNIT INSTALLATION
Ceiling ounting Installation
1. Determine the mounting location on the ceiling for the indoor
unit. Follow the selection criteria in the previous section.
2. Locate the factory supplied installation template included
in carton and attach to the ceiling.
3. Mark and drill the 4 mounting holes for the indoor unit.
4. Depending on the type of ceiling, attach the threaded hanger
bolts securely to the support stud. Before lifting the indoor unit
to the installation location, insert the upper nuts, flat washers
(with insulation), flat washers (without insulation), lower nuts
and double locking nuts on the threaded hanger bolts.
NOTE: The hanger bolts, nuts, and washers are field
supplied. nstall the washer with cushion so that the insulation
faces downward.
5. Verify indoor unit mounting by carefully lifting unit and
setting it on the 4 hanger bolts (between the two washers)
using the factory provided slots on the side brackets as
shown in figures right.
6. Confirm that the indoor unit main body is level horizontally as
shown in figure bottom right. Adjust mounting nuts as needed.
7. After checking the positioning of the indoor unit, securely tighten
the hanger nuts to fasten the indoor unit in place.
NOTE: Do not reinstall air inlet grille or side panels
until instructed.
Mounting
Slots
Level Bar
Hanging Bolt
Threaded
Hanger Bolt
Washer
Nut
Nut
Nut
Washer
Nut Flat Washer
Flat Washer
Nut
Paper Template

OUTDOOR UNIT INSTALLATION
The unit should be located with the unit support feet firmly on the equipment pad.
f the outdoor unit is exposed to wind, it must be properly secured.
WARNING
odel ABCDE
SC-18Z-UM
37-5/8 15-5/8 27-1/2 22 14-1/8
(955) (396) (700) (560) (360)
SC-30Z-UM
38-5/8 16-3/4 31-1/8 24 15-1/2
SC-36Z-UM
(980) (427) (790) (610) (395)
SC-42Z-UM
43-5/8 17-3/8 43-1/4 24-7/8 15-3/4
SC-48Z-UM
(1107) (440) (1100) (631) (400)
37-3/4 16-1/4 53-1/8 22-1/2 14-3/4
(958) (412) (1349) (572) (376)
OUTDOOR UNIT DI ENSIONS in (mm)
13
18K-36K
42K-48K

OUTDOOR UNIT INSTALLATION
Drain Joint
Chassis
Bottom
Drain pipe mounting hole
Condensate Drainage of the Outdoor Unit
The outdoor unit should be installed with a drain pipe to drain condensate water during the
heating mode.
1. nsert the drain joint (included) into the selected hole located on the bottom of the
base pan and then connect the drain hose (field supplied) to the drain joint.
2. All other holes must be sealed with plugs (included) to avoid water leaks, except for
the drain pipe mounting hole.
3. Route drain hose to safe location for disposing of condensate water.
14

Piping Preparation
1. Do not open service valves or remove protective caps on pipes until instructed by this manual.
2. Keep tubing free of dirt, sand, moisture and contaminants.
3. nsulate each refrigerant pipe and condensate hose with minimum 3/8” (10 mm) wall
thermal pipe insulation.
4. Bind refrigerant pipes and communication cable together with cable ties at 12-inch intervals.
5. nclude the condensate hose in bundle for exterior portion only.
15
PIPING INSTALLATION
Refrigerant Piping
Drill Hole in Wall
1. Locate and mark proper location for the wall hole.
2. Cut the 2 3/4” wall hole with a 5° to 10°
downward slant to the outdoors.
3. nsert a wall sleeve (field supplied) into hole to
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 indoor space.
NOTE: Expandable foam insulation may be added to fill large wall gaps. Apply per
manufacturer's instructions.
Seal Hole
Hole Size
ndoor Outdoor
Wall Hole Diagram
Oil return bend
Indoor
Outdoor
20 ft. 30 ft.
Oil return bend
Indoor Unit below Outdoor Unit Application
When height difference between indoor unit and outdoor
unit is more than 30 feet, an oil return bend should be added
for every 20 feet of connection pipe as shown.
Wall
Hole Sleeve
nsulate entire interior section of condensate hose to prevent sweating which may cause water
stains or wall damage.
CAUTION

16
PIPING INSTALLATION
Indoor Unit Pipe Connections
1. Feed refrigerant pipes, drain hose and communication cable assembly through wall hole
from outdoor to the Floor/Ceiling indoor unit.
2. Pull the piping assembly to the indoor unit. Carefully bend refrigerant pipes to meet indoor
unit connection ports. Use proper tools to avoid kinks.
3. Add a small amount of refrigerant oil to
both ends of the flare fittings.
4. Starting with either refrigerant pipe, carefully
center the pipe to the indoor unit connection
port then hand tighten the flare nut.
5. Repeat procedure with remaining pipe.
6. Tighten both flare nuts using a standard wrench and a torque wrench as shown below.
7. Carefully tighten flare nuts to correct torque level referring to the Torque Table below.
8. ndividually insulate each bare refrigerant pipe and joint as shown below to prevent sweating.
Pipe Diameter Nut Size Tightening Torque
inch (mm) inch (mm) ft-lbs N-m
1/4 (6) 1/4 (17) 11 to 22 15 to 30
3/8 (9.5) 3/8 (22) 26 to 29 35 to 40
1/2 (12.7) 1/2 (25) 33 to 37 45 to 50
5/8 (16) 5/8 (29) 44 to 48 60 to 65
Liquid pipe
Gas pipe
Front outlet
Insulate pipe connection
Insulate pipe
Insulate pipe
2
Reference A:
Cover this portion with insulation
Pipe insulation
L
Over tightening may damage flare connections and cause leaks.
CAUTION
Copper
piping
Oil applied
(to reduce friction
with the flare nut)
Flare nut Oil applied
(improves seal
air-tightness)
90
90
Holding spanner
Torque wrench
Floor/Ceiling ndoor Unit

PIPING INSTALLATION
Outdoor Unit Pipe Connections
17
1. Remove service valve cover (if provided) to access
the service valves and refrigerant ports.
2. Carefully bend and adjust length of refrigerant pipes
to meet outdoor unit service valve connections
with proper tools to avoid kinks.
3. Add a small amount of refrigerant oil to both ends
of the flare fittings.
4. Starting with either refrigerant pipe, carefully
center the pipe to the indoor unit connection
port then hand tighten the flare nut.
5. Repeat procedure with remaining pipe.
6. Tighten both flare nuts using a standard wrench
and a torque wrench as shown.
7. Carefully tighten flare nuts to correct torque level referring to the Torque Table below.
Copper
piping
Oil applied
(to reduce friction
with the flare nut)
Flare nut Oil applied
(improves seal
air-tightness)
Over tightening may damage flare connections and cause leaks.
CAUTION
Gas pipe
3-way valve
R
2-way valve
Liquid pipe
or
Pipe
coupling
Service
Valve Cover
Service
Valve Cover
90
Pipe Diameter Nut Size Tightening Torque
inch (mm) inch (mm) ft-lbs N-m
1/4 (6) 1/4 (17) 11 to 22 15 to 30
3/8 (9.5) 3/8 (22) 26 to 29 35 to 40
1/2 (12.7) 1/2 (25) 33 to 37 45 to 50
5/8 (16) 5/8 (29) 44 to 48 60 to 65

18
PIPING INSTALLATION
Indoor Condensate Drain Piping
Observe all local sanitary codes when installing condensate drains.
WARNING
The drain piping should be as short as possible with a constant downward slope. t is recommended
to install the condensate drain system with hard polyvinyl chloride (PVC) pipe and matching
connectors. Use piping of the same or greater diameter as the unit connection.
The Floor/Ceiling drainage port diameter is 11/16-in
(17-mm) OD.
Pitch the condensate drain pipe at a gradual 2.5% pitch
(Example: ¼-in drop over a 10-in length) without
obstructions. Use pipe hanger/brackets to support
the condensate drain pipe from dropping.
f a gradual pitch from the drainage port is not obtainable, use an auxiliary condensate pump with
float valve. A float valve is recommended to shut off the system if auxiliary pump fails.
NOTE: nsulate condensate hose and/or pipes to prevent sweating which may cause
water stains or wall damage.
Ceiling Hangers
Wall
Completing Condensate Drainage Piping
• nclude the exterior section of condensate hose in the pipe/wire bundle.
• Fasten the refrigerant and condensate pipe assembly to the exterior
wall for support.
• The drain pipe should terminate 6 inches above grade.
Test the Condensate Drainage Piping
• Find the drainage port with the air inlet grille and right side panel removed.
• Slowly add 20 to 24 oz. of water to the drain pan as shown below.
• Water must drain freely from the unit f not, check the pipe slope or see if there are any pipe restrictions.
• Verify all piping joints are leak free.
Typical Drainage System

POWER AND WIRING INSTALLATION
WARNING
1. Before obtaining access to terminals, all electrical supply circuits must be disconnected.
2. Always use an independent circuit and provide an independent circuit breaker to supply
power to the system.
3. Use a circuit breaker with adequate capacity to meet the requirements.
4. All circuit breakers or fuses for the indoor and outdoor units should be installed per the
National Electric Code (NEC) and local regulations.
5. Electrical wiring must be completed in accordance with NEC, local laws, and regulations
of the electric company so that the system will operate properly.
6. Provide a GF circuit breaker at the electrical panel in accordance with the NEC and the
local electrical company standards.
7. Connect the power supply firmly to the terminal block. mproper installation may
cause a fire.
CAUTION
1. The main power supplies are high-voltage, while the communication wire and the Tether
Controller are low-voltage. They should be installed separately to avoid electromagnetic
interference.
2. High-voltage and low-voltage lines should pass through separate rubber rings at electric
box covers.
3. f the indoor unit communication wire (to the outdoor unit) and power wire are connected
incorrectly, the air conditioner may be damaged.
4. Ground both indoor unit and outdoor unit to earth ground in accordance with the applicable
local and national codes.
19

POWER AND WIRING INSTALLATION
Electric Wiring between the Indoor and Outdoor Units
Single-phase units (18K-30K) Single-phase units (36K-48K)
Power Supply
Wire
Communication
Wire
Indoor Unit Electrical Wiring
Remove the left side panel and the electric box cover, and then insert the communication wire and
power wire into the terminal board.
Indoor Communication Wiring
The recommended communication cable size is a minimum 18/2 AWG stranded bare copper
conductors THHN 300V unshielded wire. Use shielded cable if installation is in close proximity of
RF and EMI transmitting devices. Locate wire terminals #1 and #2. Connect communication cable
from outdoor unit to terminals #1 and #2. Secure cable inside wire clamp/strain relief. Verify
cable is secure, not loose and no external force on wires affects the connections at the terminals.
Indoor Unit Power Wiring
Locate wire terminals L1 and L2. Connect main electrical power
outdoor unit to terminals L1 and L2. Connect ground wire to
grounding screw. Secure electrical wires inside wire clamp/strain
relief. Verify wires are secure, not loose and no external force on
wires affects the connections at the terminals.
NOTE: Record wire colors and terminal references for
use with Outdoor Unit wire connections.
20
Left Side Panel
Electric Box Cover
Wired Controller (optional)Wired Controller (optional)
Comm Wires Comm Wires