DURASTAR Single Zone Outdoor Unit Split-style Air Conditioner Installation Guide
- June 7, 2024
- DURASTAR
Table of Contents
Single Zone Outdoor Unit Split-style Air Conditioner
INSTALLATION MANUAL
SINGLE ZONE OUTDOOR UNIT
SPLIT-STYLE AIR CONDITIONER DRA1U09S1A, DRA1U12S1A, DRA1U18S1A, DRA1U24S1A
Model Number: Serial Number: Purchase Date: Installing Contractor Company Name:
TIP
Capture relevant information about your Durastar mini-split equipment before
it is installed and write it above for future reference.
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TABLE OF CONTENTS
TABLE OF CONTENTS…………………………………………………………………………………………………………….. 2 INTRODUCTION
………………………………………………………………………………………………………………………… 3 WARNINGS
…………………………………………………………………………………………………………………………………. 3 IMPORTANT SAFETY
PRECAUTIONS …………………………………………………………………………………4 OPERATING
TEMPERATURES……………………………………………………………………………………………….7
ACCESSORIES……………………………………………………………………………………………………………………………. 8 PARTS
IDENTIFICATION …………………………………………………………………………………………………………. 9 OUTDOOR UNIT
INSTALLATION………………………………………………………………………………………… 10 STEP 1: SELECT INSTALLATION
LOCATION ………………………………………………………………….. 10 STEP 2: INSTALL THE DRAIN JOINT
…………………………………………………………………………………..11 STEP 3: ANCHOR THE OUTDOOR
UNIT…………………………………………………………………………… 12 STEP 4: CONNECT THE SIGNAL AND POWER
CABLES…………………………………………….. 13 REFRIGERANT PIPING
CONNECTIONS……………………………………………………………………………. 14 STEP 1: CUT
PIPES…………………………………………………………………………………………………………………… 16 STEP 2: REMOVE
BURRS………………………………………………………………………………………………………. 16 STEP 3: FLARE PIPE ENDS
…………………………………………………………………………………………………….17 STEP 4: CONNECT
PIPES………………………………………………………………………………………………………. 18 AIR EVACUATION
…………………………………………………………………………………………………………………….. 20 ELECTRICAL AND GAS LEAK
CHECKS……………………………………………………………………………. 21 TEST RUN
…………………………………………………………………………………………………………………………………… 22
TROUBLESHOOTING……………………………………………………………………………………………………………… 23
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INTRODUCTION
To better serve you, please do the following before contacting customer
service: · If you received a damaged product, immediately contact the retailer
or dealer that sold you the
product. · Read and follow this owner’s manual carefully to help you use and
maintain your air conditioner. · Read the troubleshooting section of this
manual as it will help you diagnose and solve common
issues. · Visit us on the web at www.durastar.com to download product guides
and up-to-date information. · If you need warranty service, our friendly
customer service representatives are available via email
at questions@durastar.com or by telephone at
1-888-320-0706.
WARNINGS
Symbols Used in This Manual
The warning symbol indicates cautionary information for the user. Extra care
and precautions should be taken to ensure the user’s safety.
The pencil indicates any manufacturer notes relating to surrounding content.
These may include further clarifications or call-outs.
A light bulb symbol indicates suggested manufacturer tips for the user to get
the most out of the Durastar equipment and to accommodate the best user
experience.
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IMPORTANT SAFETY PRECAUTIONS
Improper handling can cause serious damage or injury. Please read the
following safety information in its entirety.
Operation, Cleaning, and Maintenance Safety Precautions
· Children and people with reduced physical, sensory, or mental capabilities,
or lack of experience and knowledge, should only use this air conditioner if
they are given supervision or instructions concerning use of the air
conditioner in a safe way and understand the hazards involved.
· Children should not play with the air conditioner. · Never stick fingers or
any other body parts into the air conditioner openings. The internal fan may
be rotating at high speeds, and may result in injury. · After removing the
filter, do not touch the fins in order to avoid injury. · Maintenance must be
performed by qualified professionals. Otherwise, you may experience
personal injury or damage to the air conditioner and surrounding property. ·
Do not repair the air conditioner by yourself. It may cause electric shock or
damage. Please
contact a qualified service representative when you need to repair the air
conditioner. · Do not block the air outlet or air inlet. This could cause a
malfunction. · Do not spill water on the remote control as this can
permanently damage the remote. · If the below problems occur, please turn off
the air conditioner and disconnect power at the circuit
breaker immediately. Then contact your dealer or a qualified professional for
service. · The power cord is overheating or damaged. · There is an abnormal
sound during operation. · The circuit breaker trips frequently. · The air
conditioner gives off a burning smell. · The indoor unit is leaking. · If the
air conditioner operates under abnormal conditions, it may cause malfunctions,
electric
shock, or fire hazard. · When turning the unit on or off via the emergency
operation switch, press the switch with an
insulated object other than metal. · Do not step on the top panel of the unit,
or put heavy objects on the top panel. This could cause
damage or personal injury. · Cleaning and user maintenance should not be
performed by children without supervision. · Do not spray water on the indoor
unit. This could cause electric shock or a unit malfunction. · Do not use
flammable materials such as hair spray, lacquer, or paint near the air
conditioner as
they may catch fire. · Do not operate the air conditioner in places near
combustible gases. Emitted gases may collect
around the air conditioner and cause an explosion. · Do not use fire or a hair
dryer to dry the filter. This could cause a deformation or fire hazard. · Do
not wash the air conditioner with water as this could cause an electric shock.
· Disconnect the power supply by turning it off at the circuit breaker when
cleaning the air
conditioner. Otherwise, you could risk electric shock.
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Electrical Safety
· Only use the specified power cord. If the power cord is damaged, it must be
replaced by the manufacturer, its service agent, or similarly qualified
persons in order to avoid a hazard.
· Keep the power plug clean. Remove any dust or grime that accumulates on or
around the plug. Dirty plugs can cause fire or electric shock.
· Do not pull the power cord to unplug unit. Hold the plug firmly and pull it
from the outlet. Pulling directly on the cord can damage it, which can lead to
fire or electric shock.
· Do not connect the air conditioner to a multi-purpose socket. Doing so could
cause a fire hazard. · Do not modify the length of the power supply cord or
use an extension cord to power the unit. · If the supply cord is damaged, it
must be replaced by the manufacturer, a service agent, or a
similarly qualified person in order to avoid a safety hazard. · Do not share
the electrical outlet with other appliances. Improper or insufficient power
supply can
cause fire or electrical shock. · The product must be properly grounded at the
time of installation, or electrical shock may occur. · For all electrical
work, follow all local and national wiring standards and regulations. Connect
cables tightly, and clamp them securely to prevent external forces from
damaging the terminal. Improper electrical connections can overheat and cause
fire, and may also cause shock. All electrical connections must be made
according to the Electrical Connection Diagram located on the panels of the
indoor and outdoor units. · 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 fire, or cause electrical shock. · The air
conditioner’s circuit board (PCB) is designed with a fuse to provide
overcurrent protection. The specifications of the fuse are printed on the
circuit board.
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Installation Safety
· Installation must be performed by an authorized dealer or specialist.
Improper installation can cause water leakage, electrical shock, or fire. (In
North America, installation must be performed in accordance with NEC and CEC
requirements by authorized personnel only.)
· Installation must be performed according to the installation instructions.
Improper installation can cause water leakage, electrical shock, or fire.
· This air conditioner shall be installed in accordance with national and
local wiring regulations. · Contact an authorized service technician for
repair or maintenance of this unit. · Only use the included accessories,
parts, and specified parts for installation. Using non-standard
parts can cause water leakage, electrical shock, fire, and can cause the unit
to fail. · Install the unit in a firm 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. · Install drainage piping
according to the instructions in the installation manual. Improper drainage
may cause water damage to your home and property. · For units that have an
auxiliary electric heater, do not install the unit within 3 feet (1 meter) 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 a fire. · Do not turn on the power until all work has been
completed. · When moving or relocating the air conditioner, consult
experienced service technicians for disconnection and re-installation of the
unit.
Additional Precautions
· Turn off the air conditioner and disconnect the power if you are not going
to use it for a long time. · Turn off and unplug the unit during storms. ·
Make sure that water condensation can drain unhindered from the unit. · Do not
operate the air conditioner with wet hands. This may cause electric shock. ·
Do not use this device for any other purpose than its intended use. · Do not
climb onto or place objects on top of the outdoor unit. · Do not allow the air
conditioner to operate for long periods of time with doors or windows open, or
if the humidity is very high.
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OPERATING TEMPERATURES
Your air conditioner is designed to operate in the following indoor and
outdoor temperatures. When your air conditioner is used outside of the
following temperature ranges, certain safety features may activate and turn
off the unit to protect it from damage.
TEMPERATURE RANGES
Indoor Air Temperature
Outdoor Air Temperature
COOL mode 62°F – 90°F (17°C – 32°C) -13°F – 122°F (-25°C – 50°C)
HEAT mode 32°F – 86°F (0°C – 30°C) -13°F – 86°F (-25°C – 30°C)
DRY mode 50°F – 90°F (10°C – 32°C) 32°F – 122°F (0°C – 50°C)
To further optimize the performance of your unit, do the following: · Keep doors and windows closed. · Limit energy usage by using TIMER ON and TIMER OFF features. · Do not block air inlets or outlets. · Regularly inspect and clean air filters.
NOTE
Your Durastar air conditioner’s outdoor unit is equipped with a base pan
heater, allowing it to continue to operate at freezing temperatures as low as
-13°F (-25°C). When outdoor air temperatures are at or below 32°F (0°C), we
strongly recommend keeping the unit plugged in at all times to ensure smooth
ongoing performance.
NOTE
Keep the room’s relative humidity below 80%. If the air conditioner operates
in excess of this, the surface of the air conditioner may attract
condensation. To help prevent condensation from forming and dripping, set the
vertical airflow louver to its maximum angle (vertically to the floor) and set
the fan to HIGH.
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ACCESSORIES
INCLUDED INSTALLATION ACCESSORIES
The air conditioning system comes with the following accessories.
Accessory Manual
Quantity 2
Image
Accessory Rubber Foot
Quantity 4
Image
FIELD SUPPLIED INSTALLATION ACCESSORIES
The following installation accessories may be required and must be purchased
separately.
· Refrigerant piping (line set) · Indoor and outdoor connection wire · Outdoor
power supply cord · Drain pipe · Pipe and cable wrapping tape · Wall hole
sleeve and cover · Putty · Wiring u-lugs
TOOLS NEEDED
The following tools are required for installation.
· Phillips screwdriver · Drill with 2 1/2″ or 3 1/2″ (indoor unit model
depending) core bit · Vacuum pump · HVAC manifold gauge set · Refrigerant leak
detector · Copper pipe cutter · Flaring tool · Burr reamer · Crescent or
spanner wrench · Hexagonal wrench set · Torque wrench · Multimeter ·
Electroprobe · Level · Hammer · Wire strippers · Wire crimper
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PARTS IDENTIFICATION
NOTE
The installation must be performed in accordance with the required local and
national standards. The installation may be slightly different in different
areas.
Air Inlets
Signal Cable, Refrigerant Pipes, and Drain Hose
Air Outlet
Wiring Terminal Valve Cover
NOTE
Illustrations in this manual are for explanatory purposes. The actual shape of
your mini-split equipment may vary slightly.
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OUTDOOR UNIT INSTALLATION
Installation Instructions
Install the unit following local codes and regulations. These may differ
slightly between regions.
24″ (610) above
12″ on
(305) left
12″ (b3a0c5k) wall from
79″in(2f0ro0n7t)
o2n4″rig(6h1t0)
STEP 1: SELECT INSTALLATION LOCATION
Before installing the outdoor unit, you must choose an appropriate location.
The following are standards that will help you choose an appropriate location
for the unit.
Proper installation locations meet the following standards: · Meets all
spatial requirements shown in installation space requirements above. · Good
air circulation and ventilation. · Firm and solid location –the location can
support the unit’s weight and will not vibrate. · Noise from the unit will not
disturb others. · Protected from prolonged periods of direct sunlight or rain.
· Where snowfall is anticipated, raise the unit above the base pad to prevent
ice buildup and coil
damage. Mount the unit high enough to be above the average accumulated area
snowfall. The minimum height must be 18 inches.
DO NOT install unit in the following locations: · Near an obstacle that will
block air inlets and outlets. · Near a public street, crowded areas, or where
noise from the unit will disturb others. · Near animals or plants that will be
harmed by hot air discharge. · Near any source of combustible gas. · In a
location that is exposed to large amounts of dust. · In a location exposed to
an excessive amount of salty air.
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Special considerations for extreme weather If the unit is exposed to heavy
wind, install unit so that the air outlet fan is at a 90° angle to the
direction of the wind. If needed, build a barrier in front of the unit to
protect it from extremely heavy winds. See figures below.
Strong wind
Strong wind
Wind Baffle
Strong wind
If the unit is frequently exposed to heavy rain or snow Build a shelter above
the unit to protect it from rain or snow. Be careful not to obstruct airflow
around the unit.
STEP 2: INSTALL THE DRAIN JOINT 1. Fit the rubber seal on the end of the drain
joint that will connect to the outdoor unit. 2. Insert the drain joint into
the hole in the base pan of the unit. 3. Rotate the drain joint 90° until it
clicks in place facing the front of the unit. 4. Connect a drain hose
extension (not included) to the drain joint to redirect water from the unit
during heating mode.
Base pan hole of outdoor unit
Seal Seal
Drain joint
NOTE
In cold climates, make sure that the drain hose is as vertical as possible to
ensure swift water drainage. If water drains too slowly, it can freeze in the
hose and flood the unit.
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STEP 3: ANCHOR THE OUTDOOR UNIT The outdoor unit can be anchored to the ground
or to a wall-mounted bracket (sold separately) with bolts (M10). Mount the
unit on a cement slab, condenser mounting pad, or other level surface able to
support the unit’s weight. Do not place the unit directly on the ground. If
using a wall-mounting bracket, make sure the attached structure can support at
least four times the unit’s weight. Unit Mounting Dimensions The distance
between their mounting feet varies by outdoor unit. Prepare the installation
base of the unit according to the dimensions below. In most cases, it may be
easier to place the outdoor unit in its correct location and mark the exact
placement for the anchor holes.
A
Air inlet
Air inlet
B
Air outlet
Outdoor Unit – Dimensions W x H x D inches (mm)
Mounting Dimensions Dist. A inches (mm) Dist. B inches (mm)
DRA1U09S1A – 30 5/16″x21 7/8″x11 13/16″ (770x555x300) 19 3/16″ (487)
11 3/4″ (298)
DRA1U12S1A – 31 1/2″x21 13/16″x13 1/8″ (800x554x333)
20 1/4″ (514)
13 3/8″ (340)
DRA1U18S1A – 33 1/4″x27 5/8″x14 5/16″ (845x702x363)
21 1/4″ (540)
13 3/4″ (350)
DRA1U24S1A – 37 1/4″x31 7/8″x16 1/8″ (946x810x410)
26 1/2″ (673)
15 7/8″ (403)
Installing multiple outdoor units If installing multiple outdoor units, refer to the diagram below for proper clearances.
L
A
L 1/2H L H
1/2H < L H
9 13/16″ (250mm) 11 13/16″ (300mm)
L > H
Can not be installed
(2590m13m/1)6″ (2590m13m/1)6″
H
L A
118″ (3000mm)
(155090″mm) 2(63050/m8″m)
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STEP 4: CONNECT THE SIGNAL AND POWER CABLES The outside unit’s terminal block
is protected by an electrical wiring cover on the side of the unit. A
comprehensive wiring diagram is printed on the inside of the wiring cover.
WARNING
Before performing any electrical or wiring work, turn off the main power to
the system.
USE THE RIGHT CABLE · Outdoor Power Cable: H07RN-F · Signal Cable: H07RN-F
CABLE SIZING Use a minimum of 16 AWG for power and signal cables connected to
and between the indoor and outdoor units.
Choose the Correct Size of Cable The size of the outdoor power cable, signal
cable, fuse, and switch needed is determined by the maximum current of the
unit. The maximum current is indicated on the nameplate located on the side
panel of the unit. Refer to this nameplate to choose the right cable, fuse, or
switch.
Prepare the cable and wires for connection: · Using wire strippers, strip the
rubber jacket from both ends of cable to reveal about 1.5″ (38-
40mm) of the wires inside. · Strip the insulation from the ends of the wires.
· Using a wire crimper, crimp u-lugs on the ends of the wires.
WARNING
Pay attention to the live wire. While crimping wires, make sure you clearly
distinguish the Live (“L”) Wire from other wires.
WARNING
All wiring work must be performed strictly in accordance with the wiring
diagram located inside the terminal cover of the outdoor unit.
1. Remove the electrical wiring cover. 2. Remove the caps on the conduit
panel. 3. Temporarily mount the conduit tubes (sold separately) onto the
conduit panel. 4. Properly connect both the power supply and low voltage lines
to the corresponding terminals on
the terminal block. 5. Ground the unit in accordance with local codes. 6. Be
sure to cut the wire several inches longer than the required length for future
maintenance. 7. Permanently secure the conduit tubes to the conduit panel. 8.
Replace the wire cover on the side of the unit, and screw it in place.
(See image on next page.)
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Terminal block Over 1.57in.(40mm)
Connecting cable
G
Power supply cord
Conduit panel
Wire Cover
Select the appropriate holes to feed the wires through according to their diameter.
REFRIGERANT PIPING CONNECTIONS
WARNING
When connecting refrigerant piping, do not let substances or moisture other
than specified refrigerant enter the unit or pipes. The presence of foreign
materials will lower the unit’s capacity and can cause abnormally high
pressure in the refrigeration system. This can result in explosion and
personal injury.
REFRIGERANT PIPE LENGTH The length of refrigerant piping will affect the
performance and efficiency of the unit. Nominal efficiency is tested with a
pipe length of 25 feet (7.6 meters). A minimum pipe run of 10 feet (3 meters)
is required to minimize vibration and excessive noise.
Refer to the table below for specifications on the maximum length and drop
height of refrigerant piping.
Capacity (BTU/h)
< 15,000 15,000 and < 24,000 24,000 and <36,000
Maximum Length Feet (Meters)
82 Ft. (25 M) 98.5 Ft. (30 M) 164 Ft. (50 M)
Maximum Drop Height Feet (Meters)
33 Ft. (10 M) 66 Ft. (20 M) 82 Ft. (25 M)
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OIL TRAPS Oil traps are necessary for the continued performance of the system if the indoor and outdoor units are installed at significantly different heights.
If the indoor unit is installed higher than the outdoor unit: Oil may flow back into the outdoor unit’s compressor and cause liquid compression. This will lead to deterioration of performance and shorten the life of the compressor. Oil traps in the rising gas piping can prevent this and should be installed every 32’10” (10m) of vertical rise.
If the outdoor unit is installed higher than the indoor unit: Proper oil return to the compressor must be maintained with the suction gas velocity. If velocities drop below 1500fpm, oil return will be decreased and lead to deterioration of performance and shorten the life of the compressor. Oil traps in the rising gas piping can prevent this and should be installed every 19’9″ (6m) of vertical rise.
Gas Pipe Oil Trap
Indoor Unit
Gas Pipe Oil Trap
Outdoor Unit
Outdoor Unit
Liquid Pipe
32′ 10″ (10m)
32′ 10″ (10m)
Indoor Unit
Liquid Pipe
19′ 9″ (6m)
19′ 9″ (6m)
Required distance between oil traps when the indoor unit is installed higher
than the
outdoor unit.
Required distance between oil traps when the outdoor unit is installed higher
than the
indoor unit.
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REFRIGERANT PIPE CONNECTION INSTRUCTIONS
STEP 1: CUT PIPES When preparing refrigerant pipes, take extra care to cut and
flare them properly. This will ensure efficient operation and minimize leaks
and the need for future maintenance. 1. Measure the distance between the
indoor and outdoor units. 2. Using a pipe cutter, cut the pipe length a little
longer than the measured distance. 3. Make sure that the pipe is cut at a
perfect 90o angle. 4. Do not damage, deform, or dent the pipe while cutting.
90°
Oblique Rough Warped
STEP 2: REMOVE BURRS Burrs can affect the airtight seal of the refrigerant
piping connection and must be completely removed. 1. Hold the pipe at a
downward angle to prevent burrs from falling into the pipe. 2. Using a reamer
or deburring tool, remove all burrs from the cut section of the pipe.
Pipe Reamer
Point downward
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STEP 3: FLARE PIPE ENDS Proper flaring is essential to achieve an airtight
seal. 1. After removing burrs from cut pipe, seal the ends with PVC tape to
prevent foreign materials from
entering the pipe. 2. Sheath pipe with insulating material. 3. Place flare
nuts on both ends of the pipe. Make sure they are facing in the right
direction as you
cannot change their orientation after flaring.
Flare nut
Copper pipe
4. Remove PVC tape from ends of pipe when ready to perform flaring. 5. Clamp
flare form on the end of pipe. The end of the pipe must extend beyond the edge
of the flare
form in accordance with the pipe extension table.
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PIPE EXTENSION BEYOND FLARE FORM
Outer Diameter of Pipe Inches (mm)
Ø 0.25″ (6.35mm) Ø 0.375″ (9.52mm)
Ø 0.5″ (12.7mm) Ø 0.63″ (16mm) Ø 0.75″ (19mm)
“A” Minimum Extension Inches (mm)
0.0275″ (0.7mm) 0.04″ (1.0mm) 0.04″ (1.0mm) 0.078″ (2.0mm) 0.078″ (2.0mm)
Flare form
A
“A” Maximum Extension Inches (mm) 0.05″ (1.3mm)
0.063″ (1.6mm) 0.07″ (1.8mm) 0.086″ (2.2mm) 0.094″ (2.4mm)
Pipe 6. Place flaring tool onto the form. 7. Turn the handle of the flaring
tool clockwise until the pipe is fully flared. 8. Remove the flaring tool and
flare form, then inspect the pipe for cracks and even flaring.
STEP 4: CONNECT PIPES When connecting refrigerant pipes, be careful not to use
excessive torque or to deform the piping in any way. You should first connect
the low-pressure pipe, then the high-pressure pipe.
When bending connective refrigerant piping, the minimum bending radius is 4
inches (10cm).
Radius 4″ (10cm)
CONNECTING PIPING TO INDOOR UNIT 1. Align the center of the two pipes that you will connect.
Indoor unit tubing
Flare nut Pipe
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2. Tighten the flare nut as tightly as possible by hand. 3. Using a spanner,
grip the nut on the unit tubing. 4. While firmly gripping the nut on the unit
tubing, use a torque wrench to tighten the flare nut
according to the torque values in the table below. Loosen the flaring nut
slightly, then tighten again.
Outer Diameter of Pipe Inches (mm) Ø 0.25″ (6.35mm) Ø 0.375″ (9.52mm)
Ø 0.5″ (12.7mm) Ø 0.63″ (16mm) Ø 0.75″ (19mm)
Tightening Torque Nm (lb-ft)
18~20 (13.3~14.8) 32~39 (23.6~28.8) 49~59 (36.1~43.5)
57~71 (42~52.4) 67~101 (49.4~74.5)
Flare Dimension “B” Inches (mm)
0.33~0.34 (8.4~8.7) 0.52~0.53 (13.2~13.5) 0.64~0.65 (16.2~16.5) 0.76~0.78
(19.2~19.7) 0.91~0.93 (23.2~23.7)
Flare Shape
90 °± 4 45 °±2
B
R 0.4~0.8
WARNING
Do not use excessive torque. Excessive force can break the nut or damage the
refrigerant piping. You must not exceed the torque requirements shown in the
table above.
CONNECTING PIPING TO OUTDOOR UNIT
1. Remove the valve cover on the side of the outdoor unit. 2. Remove the
protective caps from the ends of the valves. 3. Align flared pipe end with
each valve and tighten the flare nut as tightly as possible by hand. 4. Using
a spanner, grip the body of the valve. Do not grip the nut that seals the
service valve. 5. While firmly gripping the body of the valve, use a torque
wrench to tighten the flare nut according
to the correct torque values in the table above. 6. Loosen the flare nut
slightly, then tighten again. 7. Repeat steps 3-6 for the remaining pipe.
Valve cover
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AIR EVACUATION
PREPARATIONS AND PRECAUTIONS Air and foreign matter in the refrigerant system
can cause abnormal rises in pressure, which can damage the air conditioner,
reduce energy efficiency, and cause injury. Use a vacuum pump and manifold
gauge to evacuate the refrigerant system, removing any non-condensible gas and
moisture from the system. Evacuation should be performed upon initial
installation and if unit is relocated.
BEFORE PERFORMING EVACUATION
1. Check to make sure the refrigerant pipes connecting the indoor and outdoor
units are connected properly.
2. Check to make sure all wiring is connected properly.
EVACUATION INSTRUCTIONS
1. Connect the low pressure side hose of the manifold gauge to the service
port on the outdoor unit’s low pressure valve.
2. Connect the hose from the auxiliary port of the gauge to the vacuum pump.
3. Open the low pressure side of the gauge. Keep the high pressure side
closed. 4. Turn on the vacuum pump to evacuate the system. 5. Run the vacuum
for at least 20 minutes and until the low pressure gauge holds at -30 PSI (500
microns). 6. Once the vacuum holds, close the low pressure side of the
manifold gauge and turn off the vacuum
pump. 7. Wait 5 minutes, then check that there has been no change in pressure.
8. If there is a change in pressure, refer to the Gas Leak Check section for
how to check for leaks. 9. If there is no change in pressure, remove the cap
from the unit’s high pressure valve. 10. Open the valve with a hex wrench by
turning it 1/4 turn counterclockwise. Listen for the gas to exit
the condenser (approximately 5-10 seconds), then close the valve. 11. Watch
the pressure gauge for 1 minute to make sure there is no change in pressure.
The pressure
gauge should read slightly higher than atmospheric pressure. 12. Remove the
hose from the service port. 13. Using the hex wrench, fully open both the high
and low pressure valves on the unit. Open the valves
gently and until they reach their stopping point. Do not try to force the
valves to open further. 14. Replace all valve caps and tighten by hand.
Manifold Gauge
Low pressure gauge
Flare nut
Low pressure valve
Low pressure hose
High pressure valve Auxiliary hose
Vacuum pump
Cap
Valve body Valve stem
Low pressure valve
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NOTE ON ADDING ADDITIONAL REFRIGERANT Some systems require additional refrigerant charging depending on pipe lengths. The standard pipe length is 25′ (7.5m). Pipe lengths greater than the standard length will require additional refrigerant. The refrigerant should be charged from the service port on the outdoor unit’s low pressure valve. Additional refrigerant can be calculated using the following formula:
Liquid Side Ø .25″ (6.35mm)
(Actual pipe length – Standard pipe length) x 0.16oz/ft or
(Actual pipe length – Standard pipe length) x 15g/m
Liquid Side Ø .375″ (9.52mm)
(Actual pipe length – Standard pipe length) x 0.32oz/ft or
(Actual pipe length – Standard pipe length) x 30g/m
WARNING
DO NOT mix refrigerant types.
ELECTRICAL AND GAS LEAK CHECKS
BEFORE THE TEST RUN Only perform the test run after you have completed the
following steps: · Electrical Safety Checks – Confirm that the unit’s
electrical system is connected and operating
correctly. · Gas Leak Check – Check all flare nut connections and confirm the
system is not leaking. · Confirm that the low and high pressure valves are
fully open. · Check grounding work by measuring the grounding resistance by
visual detection and with a
multimeter. The grounding resistance must be less than 0.1 .
ELECTRICAL SAFETY CHECKS After installation, confirm that all electrical
wiring is installed in accordance with local and national regulations, and
according to this installation manual.
DURING TEST RUN Check for electrical leakage using an electroprobe and
multimeter. If electrical leakage is detected, turn off the unit and
immediately call a licensed electrician to find and resolve the cause.
WARNING
RISK OF ELECTRICAL SHOCK – All wiring must comply with local and national
electrical codes, and must be installed by a licensed electrician.
GAS LEAK CHECK There are two methods to check for gas leaks: 1. Soap and Water
Method – Using a soft brush, apply a soapy water or liquid detergent to all
pipe
connection points on the indoor and outdoor unit. The presence of bubbles
indicates a leak. 2. Leak Detector Method – If using a leak detector, refer to
the device’s operation manual for proper
usage instructions.
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GAS LEAK CHECK POINTS
Check-point of indoor unit
Check-point of outdoor unit
D
B
C
A
A: Low pressure stop valve B: High pressure stop valve C & D: Indoor unit
flare nuts
TEST RUN
TEST RUN INSTRUCTIONS You should perform the test run for at least 30 minutes.
1. Connect power to the unit. 2. Press the ON/OFF button on the remote
controller or thermostat to turn the unit on. 3. Press the MODE button to
scroll through the following functions, one at a time:
· COOL – Select lowest possible temperature. · HEAT – Select highest possible
temperature. 4. Let each function run for 5 minutes and perform the following
checks:
LIST OF CHECKS TO PERFORM No Electrical Leakage
Unit is Properly Grounded All Electrical Terminals are Properly Covered Indoor
and Outdoor Units are Solidly Installed
All Pipe Connection Points Do Not Leak Water Drains Properly from Drain Hose
All Piping is Properly Insulated Unit Performs COOL Function Properly Unit
Performs HEAT Function Properly
Indoor Unit Louvers Move Properly Indoor Unit Responds to Remote Controller or
Thermostat
PASS
FAIL
5. Double check all pipe connections. During operation, the pressure of the refrigerant system will increase. This may reveal leaks that were not present during the initial leak check. Take time during the test run to recheck all pipe connection points. Refer to Gas Leak Check section for instructions.
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TROUBLESHOOTING
SAFETY PRECAUTIONS
If ANY of the following conditions occurs, turn off your unit immediately! ·
The power cord is damaged or abnormally warm · You smell a burning odor · The
unit emits loud or abnormal sounds · A power fuse blows or the circuit breaker
frequently trips · Water or other objects fall into or out of the unit DO NOT
ATTEMPT TO FIX THESE YOURSELF! CONTACT AN AUTHORIZED SERVICE PROVIDER
IMMEDIATELY!
COMMON ISSUES
The following problems are not a malfunction and in most situations will not
require repairs.
ISSUE
POSSIBLE CAUSES
Unit does not turn on when pressing ON/OFF button
The Unit has a 3-minute protection feature that prevents the unit from overloading. The unit cannot be restarted within three minutes of being turned off.
The unit changes from COOL/HEAT mode to FAN mode
The unit may change its setting to prevent frost from forming on the unit. Once the temperature increases, the unit will start operating in the previously selected mode again.
The set temperature has been reached, at which point the unit turns off the compressor. The unit will continue operating when the temperature fluctuates again.
The indoor unit emits white mist
In humid regions, a large temperature difference between the room’s air and the conditioned air can cause white mist.
Both the indoor and
When the unit restarts in HEAT mode after defrosting, white mist may be
outdoor units emit white emitted due to moisture generated during the defrosting process.
mist
The indoor unit makes noises
A rushing air sound may occur when the louver resets its position.
A squeaking sound may occur after running the unit in HEAT mode due to
expansion and contraction of the unit’s plastic parts.
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ISSUE
POSSIBLE CAUSES
Both the indoor unit and outdoor unit make noises
The outdoor unit makes noises Dust is emitted from either the indoor or
outdoor unit The unit emits a bad odor
Low hissing sound during operation: This is normal and is caused by
refrigerant gas flowing through both indoor and outdoor units. Low hissing
sound when the system starts, has just stopped running, or is defrosting: This
noise is normal and is caused by the refrigerant gas stopping or changing
direction. Squeaking sound: Normal expansion and contraction of plastic and
metal parts caused by temperature changes during operation can cause squeaking
noises. The unit will make different sounds based on its current operating
mode.
The unit may accumulate dust during extended periods of non-use, which will be
emitted when the unit is turned on. This can be mitigated by covering the unit
during long periods of inactivity. The unit may absorb odors from the
environment (such as furniture, cooking, cigarettes, etc.) which will be
emitted during operations. The unit’s filters have become moldy and should be
cleaned.
The fan of the outdoor unit does not operate
Operation is erratic, unpredictable, or unit is unresponsive
During operation, the fan speed is controlled to optimize product operation.
Interference from cell phone towers and remote boosters may cause the unit to
malfunction. In this case, try the following: · Disconnect the power, then
reconnect. · Press ON/OFF button on remote control to restart operation.
NOTE
If problem persists, contact a local dealer or your nearest customer service
center. Provide them with a detailed description of the unit malfunction as
well as your model number.
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TROUBLESHOOTING
When troubles occur, please check the following points before contacting a
repair company.
PROBLEM
POSSIBLE CAUSES
SOLUTION
Poor Cooling Temperature setting may be higher than Lower the temperature setting Performance ambient room temperature
The heat exchanger on the indoor or outdoor unit is dirty
Clean the affected heat exchanger
The air filter is dirty
Remove the filter and clean it according to instructions
The air inlet or outlet of either unit is blocked
Turn the unit off, remove the obstruction and turn it back on
Doors and windows are open
Make sure that all doors and windows are closed while operating the unit
Excessive heat is generated by sunlight Close windows and curtains during periods of high heat or bright sunshine
Low refrigerant due to leak or long-term Check for leaks, re-seal if necessary and
use
top off refrigerant
Excessive heat is generated by sunlight Excessive heat is generated by sunlight
Too many sources of heat in the room Reduce amount of heat sources (people, computers, electronics, etc.)
Poor Heating The outdoor temperature is extremely Performance low
This model is designed to work down to -13°F, however, heating performance is impacted at temperatures below freezing
Cold air is entering through doors and Make sure that all doors and windows
windows
are closed during use
Low refrigerant due to leak or long-term use
Check for leaks, re-seal if necessary, and top off refrigerant
The unit starts and stops frequently
There’s too much or too little refrigerant in the system
Incompressible gas or moisture has entered the system
Check for leaks and recharge the system with refrigerant
Evacuate and recharge the system with refrigerant
The compressor is broken
Replace the compressor
The voltage is too high or too low
Install a manostat to regulate the voltage
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PROBLEM The unit is not working
Indicator lamps continue flashing or error code appears
POSSIBLE CAUSES
SOLUTION
Power failure
Wait for the power to be restored
The power is turned off
Turn on the power
The fuse is burned out
Replace the fuse
Remote control batteries are dead
Replace batteries
The Unit’s 3-minute protection has been Wait three minutes after restarting the
activated
unit
Timer is activated
Turn timer off
The unit may stop operation or continue to run safely. If the indicator lamps continue to flash or error codes appear, wait for about 10 minutes. The problem may resolve itself. If not, disconnect the power, then connect it again. Turn the unit on. If the problem persists, disconnect the power and contact your nearest customer service center.
NOTE
If your problem persists after performing the checks and diagnostics above,
turn off your unit immediately and contact an authorized service center.
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©2021 Durastar
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References
- Durastar - Reliable, evenly distributed temperature control solutions
- Durastar - Reliable, evenly distributed temperature control solutions
Read User Manual Online (PDF format)
Read User Manual Online (PDF format) >>