DURASTAR DRAM30S1A Air Handler Unit Instruction Manual

DURASTAR DRAM30S1A Air Handler Unit

Product Information

Specifications

• Air Handler Unit: 30K to 60K
• Models: DRAM30S1A, DRAM36S1A, DRAM48S1A, DRAM60S1A
• Electrical: 208/230V 1ph 60 HZ 24V / RS485 Communicating

Product Usage Instructions

Safety Precautions

Before operating the unit, ensure to read and understand all safety precautions mentioned in the manual to prevent any damage or injury.

Installation

Make sure to turn off the main power before performing any electrical or wiring work. Follow the installation guidelines provided in the manual.

Operating Temperatures

Refer to the specified temperature ranges for optimal performance in cool and heat modes. Adjust the indoor and outdoor air temperatures accordingly.

Accessories

Check and ensure that all included installation accessories are present before starting the installation process. Some accessories include manual, cable ties, remote control, foam, battery, etc.

Tools Needed

Prepare the necessary tools required for installation as per the dimensions provided. Tools may include screwdrivers, wrenches, etc.

Filter Size

Refer to the nominal size of the filter for replacement purposes. Ensure to replace filters as needed for efficient operation of the unit.

FAQ

• Q: What should I do if the unit is not functioning properly?
  • A: If you encounter any issues with the unit’s operation, contact our customer support via email at questions@durastar.com or by telephone at 1-888-320-0706 for assistance.
• Q: How do I optimize the performance of the unit?
  • A: To optimize performance, ensure proper installation, regular maintenance, and adherence to recommended operating temperatures.

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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 handler. · 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.

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 handler if they are given supervision and instructions concerning use of the air handler in a safe way and understand the hazards involved.
· Children should not play with the air handler. · Never stick fingers, other body parts, or other objects into the air inlet or outlet. The internal fan
may be rotating at high speeds. This could result in injury. · Installation and maintenance must be performed by qualified professionals. Otherwise, you may
experience personal injury or damage to the air handler and surrounding property. · If an abnormal situation arises (like a burning smell), immediately turn off the air handler and
disconnect power at the circuit breaker immediately. Then contact your dealer or a qualified professional for service. · Do not climb onto or place objects on top of the outdoor unit. · Do not install the air handler in a wet room such as a bathroom or laundry room. Too much exposure to water could cause electrical components to short circuit. · Do not operate the air handler with wet hands. This may cause electric shock. · Turn off the device and disconnect the power before cleaning. Failure to do so can cause electrical shock. · Do not clean the air handler with excessive amounts of water. · Do not clean the air handler with combustible cleaning agents. Combustible cleaning agents can cause fire or deformation. · Do not use flammable materials such as hair spray, lacquer, or paint near the air handler as they may catch fire. · Do not operate the air handler in places near combustible gases. Emitted gases may collect around the air handler and cause an explosion. · Do not use the air handler for any other purpose than its intended use. · Turn off the air handler if you are not going to use it for a long time. · Make sure that water can drain unhindered from the unit. · Do not allow the air handler to operate for long periods of time with doors or windows open, or if the humidity is very high. · Do not expose your body directly to cool air for a prolonged period of time. · If the air handler is used together with burners or other heating devices, thoroughly ventilate the room to avoid oxygen deficiency and carbon monoxide build up. · In certain environments, such as kitchens, server rooms, etc., the use of specially designed air conditioning units is highly recommended. · As with any mechanical equipment, contact with sharp sheet metal edges can result in personal injury. Take care while handling this equipment and wear gloves and protective clothing.

Electrical Safety
WARNING
Before performing any electrical or wiring work, turn off the main power to the system.
· The product must be properly grounded at the time of installation, or electrical shock may occur. · If there is a serious safety issue with the power supply, stop work immediately. Explain your
reasoning to the client, and refuse to install the unit until the safety issue is properly resolved. · For all electrical work, follow all local and national wiring standards, regulations, and the
Installation Manual. 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. · If connecting power to fixed wiring, an all-pole disconnection device which has at least 1/8″ (3mm) clearances in all poles, a leakage current that may exceed 10mA, a residual current device (RCD) that has a rated residual operating current not exceeding 30mA, and a disconnection must be incorporated in the fixed wiring in accordance with the wiring rules. · Only connect the unit to an individual branch circuit. Do not connect another appliance to that circuit. · No other equipment should be connected to the same power circuit. · Power voltage should be within 90-110% of rated voltage. Insufficient power supply can cause malfunction, electrical shock, or fire. · Installation of an external surge suppressor at the outdoor disconnect is recommended. · The air handler’s circuit board (PCB) is designed with a fuse to provide over current protection. The specifications of the fuse are printed on the circuit board. · Do not let wires touch or rest against refrigerant tubing, the compressor, or any moving parts within the unit. · To avoid getting an electric shock, never touch the electrical components soon after the power supply has been turned off. · After turning on the power, always wait 10 minutes or more before you touch the electrical components. · Make sure that you do not cross your electrical wiring with your signal wiring. This may cause distortion, interference or possibly damage to circuit boards. · Connect the outdoor wires before connecting the indoor wires.
NOTE
The allowed static pressure range of the air handler on site is 0-0.80 in-H2O (0-200 Pa). The airflow decreases below 0.80 in WC or 200Pa. System design should allow for the increased resistance as filters become dirty. The data below represents the static pressures at full required air flow used for AHRI testing. 18-24k: 0.5 in-H2O(125Pa) 30-36k: 0.5 in-H2O(125Pa) 48-60k: 0.5 in- H2O(125Pa)

Installation Safety
· Installation must be performed by an authorized dealer or specialist. Defective installation can cause water leakage, electrical shock, or fire.
· Installation must be performed according to the installation instructions. Improper installation can cause water leakage, electrical shock, or fire. (In North America, installation must be performed in accordance with the requirement of NEC and CEC by authorized personnel only.)
· Contact an authorized service provider for repair or maintenance of this unit. This appliance shall be installed in accordance with national wiring regulations.
· 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 this 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 three (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 fire.
· Do not turn on the power until all work has been completed. · When moving or relocating the air handler, consult experienced service technicians for
disconnection and re-installation of the unit. · Excessive Weight Hazard – Use two (2) or more people when moving and installing the unit.
Failure to do so can result in back or other type of injury.

OPERATING TEMPERATURES

Your air handler is designed to operate in the following indoor and outdoor temperatures. When your air handler is used outside of the following temperature ranges, certain safety features may activate and turn off the unit to protect it from damage. We strongly suggest keeping the unit plugged in at all times when temperatures are below 32°F (0°C) for smooth operation.

TEMPERATURE RANGES

COOL mode

HEAT mode

Indoor Air Temperature
Outdoor Air

60°F – 90°F (16°C – 32°C) 5°F – 122°F

32°F – 86°F (0°C – 30°C) -13°F – 75°F

Temperature

(-15°C – 50°C)

(-25°C – 24°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.

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DRY mode 50°F – 90°F (10°C – 32°C) 32°F – 122°F (0°C – 50°C)

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ACCESSORIES

INCLUDED INSTALLATION ACCESSORIES
The air conditioning system comes with the following accessories. These are usually packaged in the air outlet. Remove before install.

ACCESSORY QUANTITY

IMAGE

ACCESSORY QUANTITY

IMAGE

Manual

3

Cable Ties

2

Remote Control

1

Foam

4

Battery

2

Wired Remote

Controller (accs

1

included)

Drain Fitting

1

Flare Nut

2

Braze To Flare Adapter

2

Gasket

1

NOTE
The Durastar wired control (DRSTAT100) functions as an IR receiver for the handheld remote. If the remote is not used, it must be retained with the indoor unit to adjust parameters and for troubleshooting.
FIELD SUPPLIED INSTALLATION ACCESSORIES
The following installation accessories are required and must be purchased separately. · Refrigerant piping (line set) · Filter · 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

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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 · Micron Gauge · Refrigerant leak detector · Copper pipe cutter · Flaring tool · Burr reamer · Crescent or spanner wrench · Hexagonal wrench set · Torque wrench · Multimeter · Electro-probe · Level · Hammer · Wire strippers · Wire crimper
UNIT DIMENSIONS
C
B

A

Model BTU 30K – 48K
60K

A (Height) in (mm) 49 (1245)
53 (1346)

Dimensions
B (Depth) C (Width) in (mm) in (mm)

21 (533) 21 (533)

21 (533)

24-1/2 (622)

D in (mm)
19-5/16 (490)
22-7/8 (580)

E in (mm)
10-1/4 (260)
10-1/4 (260)

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FILTER SIZE

Nominal Size
Width in (mm) Depth in (mm) Thickness in (mm)

30k-48k 20 (495) 20 (508)
1 (25)

60k 24 (584) 20 (508)
1 (25)

PARTS IDENTIFICATION

Electrical Components

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D
T W

Air Outlet

Wire Knockouts

Electrical Heater Compartment

Blower Fan and Motor

Suction Line
Liquid Line
Horizontal Drain
Vertical Drain
Filter and Filter Cover (not shown)

Air Inlet

Evaporator

NOTE
Illustrations in this manual are for explanatory purposes. The actual shape of your equipment may vary slightly.

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INSTALLATION PREPARATION
NOTE
The installation must be performed in accordance with the required local and national standards. The installation may be slightly different in different areas.
SELECT INSTALLATION LOCATION
Before installing the indoor unit, you must choose an appropriate location. The following standards must be met for an appropriate location for the unit. Install the unit: · With enough room for installation (connecting pipe and drainage) and maintenance. · On a structure that can support its weight. If the structure is too weak, the unit may fall and
cause personal injury, unit and property damage, or death. · With heating elements at least 18 inches above the floor in a garage. Failure to follow these
instructions can result in death, explosion, or fire. · Cables and wires at least three (3) feet / one (1) meter from televisions or radios to prevent
static or image distortion. Depending on the appliances, a three (3) feet / one (1) meter distance may not be sufficient.
DO NOT install the unit in: · A wet environment. Excessive moisture can corrode the equipment, electrical components, and
cause electrical shorts. · A coastal area with high salt content in the air. · Areas with strong magnetic waves. · Areas with oil drilling or fracking. · Areas where there may be detergent or other corrosive gases in the air, such as bathrooms or
laundry rooms. · Areas that store flammable materials or gas. Danger of explosion. Keep flammable materials
and vapors, such as gasoline, away from air handler. · Areas where the air inlet or outlet of the indoor or outdoor unit may be obstructed.
NOTE
In addition, you must be aware of needed clearance space, installation direction, and duct requirements. These items are covered in the following pages.

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RECOMMENDED CLEARANCE AROUND UNIT
NOTE
Leave 24″ of clearance in front of the cabinet doors for service space.

Horizontal Installations

Minimum clearance of 1″/25.4mm on all sides

Horizontal installations

Flexible duct collar
The outlet side pipe length 59″/1.5m.

Vertical Installations
When installed vertically (upward or downward), the lower end of the air outlet needs to be connected to the L-shaped metal air duct and fastened by screws.

or

Vertical installations

INSTALLATION

DETERMINE INSTALLATION DIRECTION

The units can be installed in a vertical (up or down) or horizontal (right or left) configuration. Vertical down and horizontal right will require changing the direction of the evaporator coils.
WARNING
It is recommended that a field supplied secondary drain pan is installed with a cut-off switch. This is especially true when the installation is above or in a finished living space. Local codes may require this.

Vertical up
Airflow Direction

Horizontal

At least
3in(76mm) Make sure wiring is not laying in the pan.

Horizontal left

Upflow

Downflow

Horizontal right

NOTE
Vertical up and horizontal left installations do not need to change the direction of the evaporator.

CONVERSION INSTRUCTIONS FOR VERTICAL DOWN AND HORIZONTAL RIGHT INSTALLATION

STEP 1. REMOVE THE FILTER
Remove the filter door, then take the filter out.

STEP 2. REMOVE THE UPPER COVER

STEP 3. REMOVE THE EVAPORATOR COVER PLATE
Remove the bottom cover first, then remove the cover plate.
cover plate

bottom cover

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STEP 4. UNPLUG SENSORS T1, T2, T2A, T2B AND EEV FROM THE CONTROL BOARD
T1: Room temperature sensor T2: Evaporator central sensor plug (only some models) T2A: Evaporator input sensor plug (only some models) T2B: Evaporator output sensor plug EEV: Electronic Expansion Valve

T2 T2A&T2B T1
EEV

STEP 5. UNLATCH THE ADJUSTABLE WIRE TIES ON THE T1, T2, T2A, T2B AND EEV SENSOR CABLES.
Cut wire ties clamping wires to the coil as necessary to give slack.

30-48K model30-48k Units

60K model 60k Units

T2

T2

T2B T1

T2B
EEV T2A
T1

EEV T2A

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STEP 6. REMOVE THE EVAPORATOR AND DRAIN PAN.
STEP 7. ADJUST THE MOUNTING BRACKET TO THE PRE-DRILLED HOLES ON THE LEFT SIDE OF THE CABINET.

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STEP 8. ROTATE THE COIL 180 DEGREES AND REINSTALL THE EVAPORATOR AND DRAIN PAN.

STEP 9. REINSTALL T1, T2 SENSOR PLUGS AND TIE UP THE SENSOR WIRES
The wire body needs to pass through the wire groove from the drain pan and be stuck on the hook of the drain pan.

Cut the foam gasket.

Remove knockouts as shown in the figure.
Hook the wire into the buckle and go down from the wire slot.

Replace foam gasket over wires.

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STEP 10. USE CABLE TIES TO FIX THE ROOM TEMPERATURE SENSOR WIRE TO THE PIPES ON THE TOP OF THE EVAPORATOR.
Leave the sensor overhanging enough to not be affected by the temperature of the pipe.
cable ties
STEP 11. REINSTALL THE EVAPORATOR AND FILTER COVER PLATES.
Place unit into desired downflow or horizontal right position.

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AIR HANDLER INSTALLATION
STEP 1: CONSIDER DUCTWORK AND CONDENSATE PIPE INSTALLATION REQUIREMENTS.
STEP 2: CONNECT CONDENSATE PIPE AND REFRIGERANT PIPING. STEP 3: IF INSTALLING AN OPTIONAL AUXILIARY ELECTRIC HEATER, REFER TO
THE HEATER INSTALLATION SECTION FOR WIRING DIAGRAMS AND EXPLANATION. STEP 4: INSTALL OPTIONAL DEVICES. STEP 5: CHECK AIR FLOW AND PERFORM A TEST RUN.

Upper Cover

Electrical Control Box

Suction Line
Liquid Line Horizontal Drains
Vertical Drains

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DUCT REQUIREMENTS
NOTE
This unit is not designed for non-ducted (free-blow) applications
· Air supply and return may be handled in one of several ways best suited to the installation (See unit dimensions for duct inlet and outlet dimensions). The vast majority of problems encountered with ducted systems can be linked to improperly designed or installed duct systems. It is critical for the function and longevity of the unit that the ductwork is correctly designed and installed.
· Use flexible duct collars to minimize the transmission of vibration/noise into the conditioned space.
· It is recommended to use lined return and supply duct near the unit when noise is a concern. · The ductwork should be assembled according to the instructions. · Wrap ductwork with insulation as specified by local codes, especially when installing in an
unconditioned space. This will avoid condensation formation and building damage. · The supply air duct connection should be properly sized by use of a transition to match the
unit opening. · All ducts should be suspended using flexible hangers and never fastened directly to the structure.
WARNING
Do not install this air handler or draw return air from where a gas-fueled appliance (i.e., water heater), or carbon monoxide-producing device (i.e., wood fireplace) is installed.
WARNING
There must be an airtight seal between the bottom of the air handler and the return air plenum. Use fiberglass sealing strips, foil duct tape, caulking, or an equivalent sealing method between the plenum and the air handler cabinet to ensure a tight seal.

CONDENSATE PIPING INSTALLATION

· Insulate all piping to prevent condensation, which could lead to water damage.
· The drainpipe is used to drain water away from the unit. If the drainpipe is bent or installed incorrectly, water may leak and cause a water-level switch malfunction.
· In HEAT mode, the outdoor unit will discharge water. Ensure that the drain hose is placed in an appropriate area to avoid water damage and icy conditions on walkways.
· DO NOT pull the drainpipe forcefully. This could disconnect it.
· Please apply sealant around the places where the wires, refrigerant pipes and condensate pipes enter the cabinet.
· Use duct tape or flexible sealant to seal closed any space around the holes where the drain lines exit the cabinet. Warm air must not be allowed to enter through any gaps or holes in the cabinet.
· After removal of drain pan plug(s), check drain hole(s) to verify that drain opening is fully open and free of any debris. Also check to make sure that no debris has fallen into the drain pan during installation that may plug up the drain opening.
· On units where the blower “draws” rather than “blows” air through the coil, traps must be installed in the condensate drain lines (primary and auxiliary, if used). Traps prevent the blower from drawing air through the drain lines into the air supply.
NOTE
A field-fabricated secondary drain pan, with a drain pipe to the outside of the building, is required in all installations over a finished living space or in any area that may be damaged by overflow from the main drain pan. The drain pan must be installed under the entire unit and its condensate drain line must be routed to a location such that the user will see the condensate discharge. For horizontal installations, a secondary drain pan-not supplied-must be installed.

Drain Hole Location
The air handler has a primary and overflow drain hole for both vertical and horizontal installations. Make sure the factory installed seal plugs are tight when drains are not in use. Incorrect installation could result in leaks and flooding. See drain hole positions below.

Vertical Installation

Horizontal Installation

Primary drain
Main drain hole
Overflow drain hole

Main drain Overflow hole drain hole
Primary drain

Drain Trap Format
These units operate with a negative pressure at the drain connections and a drain trap is required. The trap needs to be installed as close to the unit as possible. Make sure the top of the trap is below the connection to the drain pan to allow complete drainage of the pan.

Drain
2 2

2

Anti-syphon

Vent

Vent T Angle Down Drain Trap 1/50

WARNING
The drainpipe outlet should be at least 1.9″ above the ground or anticipated snowfall line. If it touches the ground, the drain may become blocked.

REFRIGERANT PIPING CONNECTION
· All field piping must be completed by a licensed technician and must comply with the local and national regulations.
· When the air handler is installed in a small room, measures must be taken to prevent the refrigerant concentration in the room from exceeding the safety limit in the event of refrigerant leakage. If the refrigerant leaks and its concentration exceeds its proper limit, hazards due to lack of oxygen may result.
· When installing the refrigeration system, ensure that air, dust, moisture or foreign substances do not enter the refrigerant circuit. Contamination in the system may cause poor operating capacity, high pressure in the refrigeration cycle, explosion or injury.
· Ventilate the area immediately if there is refrigerant leakage during the installation. Leaked refrigerant gas is both toxic and may be flammable. Ensure there is no refrigerant leakage after completing the installation work

Refrigerant Piping Specifications

Capacity

Refrigerant Connection
Size

Standard Length w/ Precharged Refrigerant

in (L x G)

ft (m)

30k

3/8 x 3/4

25 (7.6)

36k

3/8 x 3/4

25 (7.6)

48k

3/8 x 3/4

25 (7.6)

60k

3/8 x7/8

25 (7.6)

Additional Refrigerant
Charge oz/ft (g/m)
0.69 (65)
0.69 (65)
0.69 (65)
0.69 (65)

Maximum Length of
Piping

Maximum Rise Length

ft (m) 164 (50)

ft (m) 82 (25)

213 (65)

98.4 (30)

213 (65)

98.4 (30)

213 (65)

98.4 (30)

NOTE
Adapters are included with the indoor unit and outdoor unit to convert the flared fittings to brazed if necessary.

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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.
CAUTION
If oil flows back into the outdoor unit’s compressor, this might cause liquid compression or deterioration of oil return. Oil traps in the rising gas piping can prevent this.

If the unit is less than 36000Btu/h an oil trap should be installed every 20ft (6m) of vertical suction line rise.

If the unit is greater than 36000Btu/h an oil trap should be installed every 32.8ft (10m)of vertical suction line rise.

Oil Trap

Suction Line

Indoor unit/ Outdoor unit

Indoor unit/ Outdoor unit

Liquid Line

Unit < 36k then 20ft (6m) Unit > 36k then 32ft (10m)

Unit < 36k then 20ft (6m) Unit > 36k then 32ft (10m)

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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
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.

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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.

PIPE EXTENSION BEYOND FLARE FORM

Outer Diameter of Pipe Inches (mm)
Ø 3/8″ (9.5mm) Ø 3/4″ (19.1mm) Ø 7/8″ (22.0mm)

“A” Minimum Extension Inches (mm) 0.04″ (1.0mm)
0.078″ (2.0mm) 0.078″ (2.0mm)

“A” Maximum Extension Inches (mm)
0.063″ (1.6mm) 0.094″ (2.4mm) 0.094″ (2.4mm)

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.

Flare form

A Pipe

TIP: THICKNESS COMPARISON
· 0.0275″ = A Thumbnail · 0.04″ = A Dime · 0.078″ = A Nickle

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.

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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). Do not leave coils in the refrigerant line sets. Remove excess line length to ensure proper system operation.
Radius ~4″ (10cm)

WARNING
Do not leave coils in the refrigerant line sets. All excess line length must be removed to ensure proper system operation.
Connecting Piping
1. Apply a thin coat of refrigerant oil on the flare part of the flare nut, but not the threads. If oil is applied to the threads the torque values can not be reached and the seal will leak.
2. Align the center of the two pipes that you will connect.

Indoor unit tubing

Flare nut Pipe

3. Tighten the flare nut as tightly as possible by hand. 4. Using a wrench, grip the nut on the unit tubing.

5. 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 in Step 3. Loosen the flaring nut slightly, then tighten again.

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Outer Diameter of Pipe Inches (mm)
Ø 3/8″ (9.5mm)
Ø 3/4″ (19.1mm)
Ø 7/8″ (22.0mm)

Tightening Torque lb-ft (Nm)
23.6~28.8 (32~39)

Flare Dimension “B” Inches (mm)
0.52~0.53 (13.2~13.5)

49.4~74.5 (67~101) 0.91~0.93 (23.2~23.7)

62.7~81.1 (85~110) 1.04~1.06 (26.4~26.9)

Flare Shape
90 °± 4 45 °±2
B
R 0.4~0.8

NOTE
It is advised to braze a 3/8 bi-flow drier on the liquid line near the indoor unit.
6. Thread the line set through the wall and connect it to the outdoor unit. 7. Insulate all the piping, including the valves of the outdoor unit.
Insulate Refrigerant Fittings
CAUTION
Wrap insulation around the piping. Direct contact with the bare piping may result in burns or frostbite.
CAUTION
Check to make sure there is no refrigerant leak after completing the installation work. If there is a refrigerant leak, ventilate the area immediately and evacuate the system (refer to the air evacuation section of the outdoor unit manual).

or

Braze Connection

Flare Connection DURASTAR.COM

Foam Tape
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WIRING OVERVIEW
NOTE
The diagrams are for explanatory purposes only. Your unit may be slightly different.

ELECTRIC HEATER INSTALLATION (OPTIONAL)
CAUTION
· Installation must be performed by a licensed contractor. Use recommended PPE. · Before installation, please confirm the electric auxiliary heat module and supplied
accessories are complete and free of damage. Do not install if any items are damaged. · Durastar factory approved heaters are UL rated with the equipment. DO NOT install a non-approved heater, this can cause damage and will not be covered under warranty. · This heater is for installation in the air handler, DO NOT mount in the ductwork.

For installations requiring supplemental heating, the optional Electric Auxiliary Heat Module is available in sizes 5kW, 8kW, 10kW, and 15kW to accommodate the specific heat load and electrical requirements of each installation. Please refer to the compatibility table below.

INCLUDED ACCESSORIES

ACCESSORY QUANTITY ACCESSORY QUANTITY

Manual

Silicone Breaker

2

1

Cover

Gasket Seal

1

Wiring Diagram

1

Screws

7

Circuit Breaker Label

1

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AUXILIARY HEATER COMPATIBILITY CHART

MODEL (Btu/h)

DRHTR05BRKA DRHTR08BRKA DRHTR10BRKA DRHTR15BRKA

5kW

8kW

10kW

15kW

DRAM30S1A (30k)

Y

Y

Y

Y

DRAM36S1A (36k)

Y

Y

Y

Y

DRAM48S1A (48k)

Y

Y

Y

DRAM60S1A (60k)

Y

Y

AUXILIARY HEATER ELECTRICAL DATA

HEATER PART MODEL NUMBER
(kW)
DRHTR05BRKA (5kW)
DRHTR08BRKA (8kW)
DRHTR10BRKA (10kW)
DRHTR15BRKA (15kW)

CIRCUIT 1 208/230V

HEATER AMPS (1)

MCA (1) MOCP (1)

CIRCUIT 2 208/230V

HEATER AMPS (2)

MCA (2)

MOCP (2)

18.0/ 20.0 23.0/ 27.0 25.0/ 30.0

28.8/ 32.0 37.0/ 42.0 40.0/ 45.0

36.0/ 40.0 46.0/ 53.0 50.0/ 60.0

18.0/ 20.0 23.0/ 27.0 25.0/ 30.0 36.0/ 40.0 46.0/ 53.0 50.0/ 60.0

INSTALLATION STEPS STEP 1: Open the upper cover.

STEP 2: Remove the knock-out hole of the upper cover.

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STEP 3: Remove the terminal block and power wires, loosen the screws, and remove the electric auxiliary heating cover.
Screws

STEP 4: Install the electric auxiliary heating assembly and note that the support assembly must lock into the support holes in the back of the cabinet.
Supports

STEP 5: Tighten the mounting screws.

Top View Screws

STEP 6: Connect the wiring according to the wiring diagram on page 32. Attach the wiring diagram sticker provided to the inside of the front cover for future reference.

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STEP 7. Install the upper cover and the silicone breaker cover.
Silicone Breaker Cover

Upper Cover

STEP 8. After installing the electric auxiliary heat module, apply the circuit breaker label included near the silicone breaker cover that was just installed for future reference.
CONFIRM ELECTRIC HEATER WIRING
After the electric heating wiring is connected, please confirm before turning power on that all wiring connections are secure and that wiring size is correct for NEC and local codes.
NOTE
The electric auxiliary heating wiring diagram is packed with the accessories. If the branch circuit wire length exceeds 100 ft, consult NEC 210-19a to determine the maximum wire length. Use a two (2)% voltage drop.

SPECIFICATIONS

NUMBER OF CIRCUIT BREAKERS

5kW

1

8kW

1

10kW

1

15kW

2

NUMBER OF RELAYS
1 2 2 3

NUMBER OF POWER CORD GROUPS

NUMBER OF POWER CORD GROUNDING
SCREWS

2

2

2

2

2

2

3

3

Only use copper wire to connect the unit. If wire other than uncoated (non- plated) 75°C copper wire (solid wire for 10 AWG and smaller, stranded wire for larger than 10 AWG) is used, consult applicable tables of the National Electric Code (ANSI/NFPA 70).

ELECTRIC AUXILIARY HEATING WIRING DIAGRAMS

NOTE
MAKE SURE THE MANUAL MATCHES THE MODEL OF YOUR AIR HANDLER. The wiring diagrams below are for installing an electric heater in a 24V / RS485 air handler. Terminal 3(S) is not used in this case.

5KW HEAT KIT
:THERMAL CUT-OUT :THERMAL LINK, SELF-RESETTING
TO INDOOR UNIT MAINBOARD CN11
3
1(L1) 2(L2) 3(S)

RED BLACK YELLOW
RED BLACK YELLOW

SD

RED

BLACK

CB1

8KW/10KW HEAT KIT
:THERMAL CUT-OUT :THERMAL LINK, SELF-RESETTING
TO INDOOR UNIT MAINBOARD CN11
3
1(L1) 2(L2) 3(S)

SD

RED

BLACK

CB1

POWER OF UNIT
NOTE: PLEASE ATTACH THE NAMEPLATE TO THE COVER OF THE ELECTRIC CONTROL BOX. ALL THE ROUND HOLES LOCATED ON THE PLATE REPRESENT NUMBERS. PLEASE REFER TO THE INSTALLATION MANUAL FOR DETAILS.

Round hole number Relay number Round hole number Air switch number

RELAY 1

CB1

L1 L2 POWER

POWER OF UNIT
NOTE: PLEASE ATTACH THE NAMEPLATE TO THE COVER OF THE ELECTRIC CONTROL BOX. ALL THE ROUND HOLES LOCATED ON THE PLATE REPRESENT NUMBERS. PLEASE REFER TO THE INSTALLATION MANUAL FOR DETAILS.

Round hole number Relay number Round hole number Air switch number

RELAY 1

CB1

RELAY 2

15KW HEAT KIT
:THERMAL CUT-OUT :THERMAL LINK, SELF-RESETTING
TO INDOOR UNIT MAINBOARD CN11
3
1(L1) 2(L2) 3(S)

RED BLACK YELLOW

SD

SD

SD

RED

BLACK

CB1

RED
CB2

BLACK

L1 L2 POWER

NOTE:

POWER OF UNIT

PLEASE ATTACH THE NAMEPLATE TO THE COVER OF THE ELECTRIC CONTROL BOX.

L1 L2

ALL THE ROUND HOLES LOCATED ON THE

POWER A

PLATE REPRESENT NUMBERS. PLEASE

REFER TO THE INSTALLATION MANUAL FOR DETAILS.

NOTE: POWER A AND B ARE DIFFERENT POWERS.

Round hole number Relay number Round hole number Air switch number

RELAY 1

CB1

RELAY 2

CB2

RELAY 4

L1 L2 POWER B

INDOOR UNIT WIRING

WARNING
Failure to follow warnings may lead to equipment damage, injury or death. Field line side wires may remain live, DO NOT perform service or maintenance until the main disconnect is pulled.
WARNING
While connecting the wires, strictly follow the wiring diagram, and refer to the nameplate for electrical information. Wire according to NEC and local codes. The refrigerant circuit can become very hot. Keep the interconnection cable away from the copper tube.
Connect the Signal Cable
The signal cable enables communication between the indoor and outdoor units. You must first choose the right cable size before preparing it for connection. Run a continuous length of cable and avoid splicing the cable.
Cable Sizing
Use the correct size cable depending on the communication type (see page 35) · Non-polar RS485 Communication (S1/S2): 16 AWG stranded, shielded · 24V Communication: 18 AWG/ 8 conductor thermostat wire · Power Cables: Determined by the minimum circuit ampacity (MCA) and maximum over current
protection (MOCP) of system and the NEC and local codes in your area. Refer to the nameplate to choose the right cable, fuse, or switch.
STEP 1. PREPARE THE CABLE FOR CONNECTION.
· Using wire strippers, strip the insulating jacket from both ends of the signal cable to reveal about 5 in (12 cm) of the wire, then strip the insulation from the ends of the wires.
STEP 2. OPEN THE FRONT PANEL OF THE UNIT.
· Using a screwdriver, remove the cover of the electric control box on your indoor unit.
STEP 3. CONNECT THE WIRES TO THE TERMINALS.
· Thread the power cable and the signal cable through the wire outlet. · Match the wire colors/labels with the labels on the terminal block. Firmly screw the wires of each
wire to its corresponding terminal. Refer to the Serial Number and Wiring Diagram located on the cover of the electric control box.

WARNING
Isolate the power supply leads from the communication wire leads by using different knockouts in the cabinet and/or zip ties.
Wiring Indoor Without Heater

Class 2 wire

Power wire

TO POWER SOURCE OR OUTDOOR

Wiring the Communication Cable

Wiring diagram

WARNING
TURN OFF POWER BEFORE ADJUSTING DIP SWITCHES.

The air handler ships with DIP SWITCH SW1 defaulted to off as seen below. Under this setting, the system will AUTOMATICALLY detect which of the three connection methods on the following page has been used. In the event of unexpected failure, the SW1 can be switched according to connection methods 1, 2,and 3.
Default Indoor Unit SW1

WARNING
DO NOT connect 24VAC to the S1/S2 terminals. This will damage the system. Only connect to Class 2 terminals.

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Wiring Methods (cont.)
WARNING
Please refer to the wiring nameplate for the wiring method.
Connection Method 1: RS485 Communication + 24V Thermostat
Use this method to connect a 24V thermostat while the indoor and outdoor are connected via RS485 communication.
Indoor Unit SW1
Connection Method 2: RS485 Communication
Use this connection method to connect the DRSTAT100 that is included with the air handler.
Indoor Unit SW1

Connection Method 3: 24V Communication
Use this method for full 24V communication. Refer to 24V wiring methods on page 39 depending on your application. Note: S1-2 must be flipped on at the outdoor unit.

Indoor Unit SW1

Note: Outdoor 24V Connection

DO NOT WIRE!!

S1 S2 B W D

S1

R C Y1 Y2 L

ON

CN6

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CONTROL LOGIC

Indoor Unit Connector

CONNECTOR

PURPOSE

R C G Y1 Y/Y2 B W W1 W2 E/AUX DH/DS/BK L

24v Power Connection Common
Fan Control Low Cooling High Cooling Heating Reversing Valve Heating Control Stage 1 Electric Heating Stage 2 Electric Heating Emergency Heating Dehumidification/Zoning Control System Fault Signal

Outdoor Unit Connector CONNECTOR
R C Y1 Y2 B W D L

PURPOSE
24v Power Connection Common
Low Cooling High Cooling Heating Reversing Valve Heating Control Defrost Control System Fault Signal

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Connection Method 3 (cont.):

The following wiring diagrams are suitable for the air handler and outdoor with a 24V thermostat.

Wiring for 4H and 2C Thermostat

Wiring for 3H and 1C Thermostat

S4-2 Defaults ON: DH function off. Turn switch OFF to activate DH function.

S4-1 Defaults ON: W1 and W2 set for single stage Aux heat. Turn OFF to separate stages.

Wiring for 3H and 2C Thermostat

S4-2 Defaults ON: DH function off. Turn switch OFF to activate DH function.

S4-1 Defaults ON: W1 and W2 set for single stage Aux heat. Turn OFF to separate stages.

Wiring for 3H and 2C Thermostat

Y1/Y2

S4-2 Defaults ON: DH function off. Emergency heating (E) controls

Turn switch OFF to activate DH two groups of electric heating at

function.

the same tme.

Wiring for 2H and 2C Thermostat

S4-2 Defaults ON: DH function off. Turn switch OFF to activate DH function.

S4-1 Defaults ON: W1 and W2 set for single stage Aux heat. Turn OFF to separate stages.

Wiring for 2H and 1C Thermostat

Wiring for 1H and 1C Thermostat

S4-1 Defaults ON: W1 and W2 set for single stage Aux heat. Turn OFF to separate stages.
Wiring for 1H and 1C Thermostat

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LED DISPLAY DEFINITIONS
The unit displays status as well as any active fault codes on the LED display. If the unit is functioning normally, the LED will display current temperature setpoint. When a fault code is active, the display will flash quickly the active fault code. Please refer to the fault code table located in the troubleshooting section of the manual for detailed fault code information.

MODE

PRIORITY G

Y1

Y/ Y2

B

W

W1 W2

E/ AUX

DH/ DS/BK

FAN SPEED

DISPLAY

OFF

/

000000 0 0

OFF

0

FAN

7

Cooling Stage 1

Cooling Stage 2 6
Dehumidification 1

Dehumidification 2

Heat Pump Stage 1

Heat Pump Stage 2

5

Heat Pump Stage 2

Electric Heater Kit 1

Electric Heater Kit 2

3

Electric Heater Kit 1 and Kit 2

Heat Pump Stage 1 + Electric Heater Kit 1

Heat Pump Stage 1 + Electric Heater Kit 2

Heat Pump Stage 2 + Electric Heater Kit 1

Heat Pump Stage 2 + Electric Heater Kit 1

Heat Pump Stage 2 + Electric Heater Kit 2

4

Heat Pump Stage 2 + Electric Heater Kit 2

Heat Pump Stage 1 + Electric Heater Kit 1 and Kit 2

Heat Pump Stage 2 + Electric Heater Kit 1 and Kit 2

Heat Pump Stage 2 + Electric Heater Kit 1 and Kit 2

Emergency Heat

1

Heating Zone Control

Heating Zone Control

Heating Zone Control 2
Heating Zone Control

Heating Zone Control

Heating Zone Control

100*00 0 0

Low

1

• 10000 0 0

1

Mid

2

• • 1000 0 0

1

High

3

• 10000 0 0

0

Low

4

• • 1000 0 0

0

Low

5

• 10100 0 0

1

Mid

6

• • 1 100 0 0

1

High

7

****10 0 0

1

High

0001 0 0

Turbo

8

0000 1 0

Turbo

0001 1 0

Turbo

9

*10101 0 0

1

Turbo

• 10100 1 0

1

Turbo

**1101 0 0

1

Turbo

10

****11 0 0

1

Turbo

• • 1 100 1 0

1

Turbo

****10 1 0

1

Turbo

*10101 1 0

1

Turbo

**1101 1 0

1

Turbo

11

****11 1 0

1

Turbo

** * 1

Turbo

12

1010 * 0

0

Low

*110 * 0

0

Low

***1 * 0

0

Low

13

0001 0 0

0

Low

0000 1 0

0

Low

0001 1 0

0

Low

Note:
1 = 24V Signal
0 = No 24V Signal
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DIP SWITCHES SETTINGS
CAUTION
Only certified service technicians should change dip switch settings. Incorrect dip switch settings cause malfunctions or harm the unit.

Function Rotary Switch
Address DIP Switch

S3 S2 S1

24V Thermostat Interface

S4

SW1 SW2 SW3

Function DIP Switch

SW4

Static Pressure DIP Switch

Use the following two charts to make any necessary dip switch changes based on the chosen control scenario.

Control Scenario

24V Tstat, S1+S2

1

DRSTAT100 Wired Controller, S1+S2

2

Full 24V

3

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DIP SWITCH DEFINITIONS

CONTROL DIP SWITCH SCENARIO

FUNCTION

ON

OFF

NOTE

SW1-2 SW1-3 SW2-1 SW2-1 SW2-2 SW2-3
SW2-4
Rotary Switch S3
SW3-1 SW3-2 SW3-3 SW3-3 SW3-4
SW4
S4-1
S4-2

1,2 1,2,3
1 2 2 2 2
2
1 1 1 2 1,3 1,2,3
1,3 1,3

Anti-cold blow protection option

NO

Single cooling / heating and cooling options Cooling [

Compressor Running (demand working with Compressor slower

heat pump+ Electric heat)

speed

Temperature differential to activate first stage auxiliary heat (the GAP of T1 and Ts), Wire controller demand with heat pump + Electric heat working together

2°F (1°C)

[Default] YES [Default] Cooling & Heating [Default] Faster Compressor
[Default] 4°F (2°C)

Only affects compressor and W1

Electric heat on delay

YES

[Default] NO

Electric auxiliary heating delay to start time 30 minutes

[Default] 15 minutes

Based on SW2-2 is ON

Compressor/Auxiliary heat outdoor ambient lockout
Set outdoor temperature Limitation (for auxiliary heating or compressor)

The compressor will not operate if the outdoor temperature is lower than the temperature represented by S3

[Default] The heater will not operate if the outdoor temperature is greater than the temperature represented by S3

0 means that the temperature protection is not turned on, the dial range is 1 through F, 1 equals -4°F and it increased up to 46°F based on the Rotary Switch table on the following page.

SW2-4 and S3 need to be working together

Maximum continuous runtime allowed before system automatically stages up capacity to satisfy set point. This adds 1 to 5°F to the user set point in the calculated control point to increase capacity and satisfy user set point

30 minutes

[Default] 90 minutes

Cooling and heating Y/Y2 temperature differential adjustment.

Compressor slower speed

[Default] Faster Compressor

Only affects compressor

Compressor Running (demand working with Compressor slower

heat pump+ Electric heat)

speed

Temperature differential to activate second stage auxiliary heating (the GAP of T1 and Ts) Wire controller demand with heat pump+Electric heat working together

4°F (2°C)

[Default] Faster Compressor
[Default] 6°F (3°C)

Only affects compressor and W2

Fan speed of cooling mode when 24V Thermostat is applied for.

Turbo

High

Electric heat nominal CFM adjustment Default ON DH function selection

Available settings are 000/001/010/011. Each digit corresponds an individual switch position. For example [SW4-1 OFF, SW4-2 ON, SW4 -3 OFF] = 010 See table 11 for the corresponding CFM adjustment

[Default] For single stage supplemental heat, W1 and W2 are connected

For dual stage supplemental heat, W1 and W2 are controlled independently.

[Default] Dehumidification control not available

Dehumidification feature is enabled through thermostat

Function DIP Switch Settings
S3 Rotary Switch
The S3 rotary switch is used to set the temperature protection between 0°F and 46°F. The switch defaults to OFF.

Rotary Switch Table

S3 S3 (°F) S3 (°C)

0

OFF

OFF

1

-4

-20

2

0

-18

3

3

-16

4

7

-14

5

10

-12

6

14

-10

7

18

-8

8

21

-6

9

25

-4

A

28

-2

B

32

0

C

36

2

D

39

4

E

43

6

F

46

8

NOTE
The SW4 DIP switch is only for certified service technicians to use.

When using a 24V thermostat, use the SW4 dip switch to set the proper air flow and heater settings.

SW4-1 SW4-2 SW4-3

000 is the default Can be set as 000/001/010/ 011/100/101/110/111, for electric heating and PSC classification depending on the unit.

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AIR VOLUME TABLE

CAPACITY
30K (2.5 TON)
36K (3 TON)

EXTERNAL STATIC
PRESSURE RANGE
0-0.80 In. w.g.
0-0.80 In. w.g.

FAN SPEED

ELECTRIC HEATER
KIT

24V THERMOSTAT
24V DIP SWITCH TERMINAL
ENGAGED

Cooling Turbo

—-

SW3-4=ON

Y2/Y

Cooling High

—-

SW3-4=OFF

Y2/Y

Cooling Medium

—-

—-

Y1

Cooling Low

—-

—-

—-

Heat Pump Turbo

—-

—-

—-

Heat Pump High

—-

—-

B+Y2/Y, W

Heat Pump Medium

—-

—-

Y1

Heat Pump Low

—-

—-

—-

Electric Heater Kit 0 (Default)

15kW

SW4-1=OFF SW4-2=OFF SW4-3=OFF

W1, W2, AUX

Electric Heater Kit 1

SW4-1=OFF 15kW, 10kW SW4-2=OFF
SW4-3=ON

W1, W2, AUX

Electric Heater Kit 2

SW4-1=OFF 10kW, 8kW SW4-2=ON
SW4-3=OFF

W1, W2, AUX

Electric Heater Kit 3

5kW

SW4-1=OFF SW4-2=ON SW4-3=ON

W1, W2, AUX

Cooling Turbo

—-

SW3-4=ON

Y2/Y

Cooling High

—-

SW3-4=OFF

Y2/Y

Cooling Medium

—-

—-

Y1

Cooling Low

—-

—-

—-

Heat Pump Turbo

—-

—-

—-

Heat Pump High

—-

—-

B+Y2/Y, W

Heat Pump Medium

—-

—-

Y1

Heat Pump Low

—-

—-

—-

Electric Heater Kit 0 (Default)

20kW

SW4-1=OFF SW4-2=OFF SW4-3=OFF

W1, W2, AUX

Electric Heater Kit 1

15kW

SW4-1=OFF SW4-2=OFF SW4-3=ON

W1, W2, AUX

Electric Heater Kit 2

SW4-1=OFF 10kW, 8kW SW4-2=ON
SW4-3=OFF

W1, W2, AUX

Electric Heater Kit 3

5kW, 8KW

SW4-1=OFF SW4-2=ON SW4-3=ON

W1, W2, AUX

WIRED CONTROLLER DIP SWITCH MODE

AIRFLOW VOLUME
(CFM)

—-

COOL

—-

COOL

—-

COOL

—-

COOL

—-

HEAT

—-

HEAT

—-

HEAT

—-
SW4-1=OFF SW4-2=OFF SW4-3=OFF
SW4-1=OFF SW4-2=OFF SW4-3=ON
SW4-1=OFF SW4-2=ON SW4-3=OFF
SW4-1=OFF SW4-2=ON SW4-3=ON
—-
—-
—-
—-

HEAT
Heat + AUX, AUX
Heat + AUX, AUX
Heat + AUX, AUX
Heat + AUX, AUX
COOL COOL COOL COOL

—-

HEAT

—-

HEAT

—-

HEAT

—-
SW4-1=OFF SW4-2=OFF SW4-3=OFF
SW4-1=OFF SW4-2=OFF SW4-3=ON
SW4-1=OFF SW4-2=ON SW4-3=OFF
SW4-1=OFF SW4-2=ON SW4-3=ON

HEAT
Heat + AUX, AUX
Heat + AUX, AUX
Heat + AUX, AUX
Heat + AUX, AUX

988 894 806 712 918 876 665 453 1088
1029
976
918 1188 1082 971 865 1112 1059 794 582 1306
1241
1176
1112

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CAPACITY
48K (4 TON)
60K (5 TON)

EXTERNAL STATIC
PRESSURE RANGE

FAN SPEED

ELECTRIC HEATER
KIT

24V THERMOSTAT
24V DIP SWITCH TERMINAL
ENGAGED

Cooling Turbo

—-

SW3-4=ON

Y2/Y

Cooling High

—-

SW3-4=OFF Y2/Y

Cooling Medium

—-

—-

Y1

Cooling Low

—-

—-

—-

Heat Pump Turbo

—-

—-

—-

Heat Pump High

—-

—-

B+Y2/Y, W

Heat Pump Medium

—-

—-

Y1

0-0.80 In. w.g.

Heat Pump Low
Electric Heater Kit 0 (Default)

—20kW

—-
SW4-1=OFF SW4-2=OFF SW4-3=OFF

—-
W1, W2, AUX

Electric Heater Kit 1

15kW

SW4-1=OFF SW4-2=OFF SW4-3=ON

W1, W2, AUX

Electric Heater Kit 2

SW4-1=OFF 10kW, 8kW SW4-2=ON
SW4-3=OFF

W1, W2, AUX

Electric Heater Kit 3

8kW

SW4-1=OFF SW4-2=ON SW4-3=ON

W1, W2, AUX

Cooling Turbo

—-

SW3-4=ON

Y2/Y

Cooling High

—-

SW3-4=OFF Y2/Y

Cooling Medium

—-

—-

Y1

Cooling Low

—-

—-

—-

Heat Pump Turbo

—-

—-

—-

Heat Pump High

—-

—-

B+Y2/Y, W

Heat Pump Medium

—-

—-

Y1

0-0.80 In. w.g.

Heat Pump Low
Electric Heater Kit 0 (Default)

—25kW

—-
SW4-1=OFF SW4-2=OFF SW4-3=OFF

—-
W1, W2, AUX

Electric Heater Kit 1

15kW, 20kW

SW4-1=OFF SW4-2=OFF SW4-3=ON

W1, W2, AUX

Electric Heater Kit 2

10kW, 15KkW

SW4-1=OFF SW4-2=ON SW4-3=OFF

W1, W2, AUX

Electric Heater Kit 3

10kW

SW4-1=OFF SW4-2=ON SW4-3=ON

W1, W2, AUX

WIRED CONTROLLER

DIP SWITCH

MODE

—-

COOL

—-

COOL

—-

COOL

—-

COOL

—-

HEAT

—-

HEAT

—-

HEAT

—-
SW4-1=OFF SW4-2=OFF SW4-3=OFF
SW4-1=OFF SW4-2=OFF SW4-3=ON
SW4-1=OFF SW4-2=ON SW4-3=OFF
SW4-1=OFF SW4-2=ON SW4-3=ON
—-
—-
—-
—-

HEAT
Heat + AUX, AUX
Heat + AUX, AUX
Heat + AUX, AUX
Heat + AUX, AUX
COOL COOL COOL COOL

—-

HEAT

—-

HEAT

—-

HEAT

—-
SW4-1=OFF SW4-2=OFF SW4-3=OFF
SW4-1=OFF SW4-2=OFF SW4-3=ON
SW4-1=OFF SW4-2=ON SW4-3=OFF
SW4-1=OFF SW4-2=ON SW4-3=ON

HEAT
Heat + AUX, AUX
Heat + AUX, AUX
Heat + AUX, AUX
Heat + AUX, AUX

AIRFLOW VOLUME
(CFM)
988 894 806 712 918 876 665 453 1741
1653
1559
1471 1188 1082 971 865 1112 1059 794 582 2171
2029
1894
1753

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Optional Function Wiring

Condensate Overflow Switch:
The unit will accommodate a remote condensate overflow switch. To enable, remove jumper J1, and connect the installer provided condensate overflow device to CN5 per below. When an overflow condition is present, the device should open the connection, signaling the unit to turn off the system.
Alarm Output:
An alarm output (CN33) can be utilized if actions are required when a fault is present. This is a passive outlet port, so you will need to input a voltage signal. The relay is normally-open for normal operation, and closed when a fault condition is active.

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Humidifier Control:
To connect a humidifier, utilize the passive signal “WORK” output (CN23) port as well as the G and C wires on the controller, and wire the humidistat and humidifier per above wiring diagram. When the fan is running, the CN23 relay will be closed, which will allow power to the humidifier when the humidistat is below humidity setpoint. If the thermostat or zone controller has an HUM interface, connect the humidifier directly to the HUM and C ports.

Dehumidification Control Wiring
Dehumidification control requires external Humidistat at DH and R. Set S4-2 as OFF. When the humidity rises and exceeds the set value of the Humidistat, the 24V signal of DH changes to 0V, the cooling system starts the dehumidification operation, and the air volume drops to 80% of the nominal cooling air volume.
UV LED Wiring
The WORK port is linked with the fan. When the fan is running, the relay is closed; if an active 24V signal is required, it can be directly connected to the G and C ports.

DURASTAR.COM

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POWER SPECIFICATIONS

WARNING
While connecting the wires, strictly follow the wiring diagram, and refer to the nameplate for electrical information. Wire according to NEC and local codes.

Indoor Units Without Electric Heat

Model Number MCA (A) MOCP (A) Volts-Phase Motor HP FLA (A)

DRAM30S1A

4.5

15

208/230-1

1/2

3.5

DRAM36S1A

5.0

15

208/230-1

1/2

4.0

DRAM48S1A

7.5

15

208/230-1

3/4

6.0

DRAM60S1A

9.0

15

208/230-1

3/4

7.0

Outdoor Units

Model Number

MCA (A)

MOCP (A)

Voltage Range (V)

Cooling Current (A)

Cooling Input Power (W)

Heating Current (A)

Heating Input Power (W)

DRA1U30S1A

20

35

187-253

13.20

2835

12.40

2795

DRA1U36S1A

24

40

187-253

15.82

3560

15.80

3110

DRA1U48S1A

34

50

187-253

23.20

5320

22.50

5117

DRA1U60S1A

34

60

187-253

29.00

6475

20.90

5085

FINAL CHECKS

CAUTION
Failure to perform the test run may result in unit damage, property damage, or personal injury.
BEFORE THE TEST RUN
A test run must be performed after the entire system has been completely installed. Confirm the following points before performing the test: · Indoor and outdoor units are properly installed. · Piping and wiring are properly connected. · No obstacles near the inlet and outlet of the unit that might cause poor performance or
product malfunction. · Drainage system is unimpeded and draining to a safe location. · Insulation of piping and duct is properly installed. · Grounding wires are properly connected. · Length of the piping and additional refrigerant capacity have been recorded. · Power voltage is the correct voltage for the air handler. · 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 Using your multimeter, verify the voltage of the main power entering the system. If the main power voltage is greater than ±10% of the name plate voltage, 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 wired 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

[ X ]

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 without leaks

[ ]

All Piping is Properly Insulated

[ ]

Unit Performs COOL Function Properly

[ ]

Unit Performs HEAT Function Properly

[ ]

There is no abnormal noise or vibration

[ ]

Indoor Unit Responds to Remote Controller or Thermostat

[ ]

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.
6. Ensure the condensate flows smoothly through the drain. It may take up to one (1) minute before the unit begins to drain, depending on the drainpipe. In new buildings, this should be performed before finishing the ceiling.

TROUBLESHOOTING

SAFETY PRECAUTIONS If ANY of the following conditions occur, 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 malfunctions and in most situations do not require repairs.

ISSUE

POSSIBLE CAUSES

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 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.

Unit does not turn on when pressing ON/OFF button

Cooling and Heating Models: If the Operation light and PRE-DEF (Pre- heating/Defrost) indicators are lit up, the outdoor temperature is too cold and the unit’s anti-cold wind is activated in order to defrost the unit.

Outdoor units emit white mist

In Cooling-only Models: If the “Fan Only” indicator is lit up, the outdoor temperature is too cold and the unit’s anti-freeze protection is activated in order to defrost the unit.
When the unit restarts in HEAT mode after defrosting, white mist may be emitted due to moisture generated during the defrosting process.

Low hissing sound during operation: This is normal and is caused by refrigerant gas flowing through both indoor and outdoor units.

Both the indoor unit Low hissing sound when the system starts, has just stopped running, or

and outdoor unit make is defrosting: This noise is normal and is caused by the refrigerant gas

noises

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.

ISSUE

POSSIBLE CAUSES

The outdoor unit makes noises

The unit will make different sounds based on its current operating mode.

The unit may absorb odors from the environment (such as furniture, cooking, cigarettes, etc.) which will be emitted during operations.

The unit emits a bad odor

The unit’s filters have become dirty and should be cleaned.
During heating the unit may emit a bad odor. This is a result of the electric heat module (AUX) heating up and burning off small particles of dust from the cooling season. This smell will lessen after a few uses and go away when the AUX heat is off.

The fan of the outdoor During operation, the fan speed is controlled to optimize product operaunit does not operate tion.

Operation is erratic, unpredictable, or unit is unresponsive

In rare cases, interference from radio waves 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.

R

TROUBLESHOOTING cont.
If trouble occurs, please check the following points before contacting a repair company.

PROBLEM POSSIBLE CAUSES

SOLUTION

Poor cooling Temperature setting may be higher Lower the temperature setting. performance than ambient room temperature.

The heat exchanger coil on the in- Contact a servicer to clean the affected

door or outdoor unit is dirty.

heat exchanger coil.

The air filter is dirty.

Replace the air filter.

The air inlet or outlet of either unit is Turn the unit off, remove the obstruction

blocked.

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.

Too many sources of heat in the Reduce amount of heat sources. room (people, computers, electronics, etc.).

Return grille is blocked or diffuser Make sure the return grille and diffusers

vents are shut.

are unrestricted.

Poor heating The outdoor temperature is experformance tremely low.

Use auxiliary heating device.

Cold air is entering through doors Make sure that all doors and windows are

and windows.

closed during use.

The air filter is dirty.

Replace the air filter.

Return grille is blocked or diffuser Make sure the return grille and diffusers

vents are shut.

are unrestricted.

Indicator lamps continue flashing or error code appears

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, turn off the unit, then turn it on again. If the problem persists, disconnect the power and contact your nearest customer service center.

The unit is not Power failure

Wait for the power to be restored

working

Remote control batteries are dead Replace the batteries

The unit’s 3-minute protection has Wait three minutes after restarting the

been activated

unit

Timer is activated

Turn timer off

NOTE
If your problem persists after performing the checks and diagnostics above, or an error code remains, turn off your unit immediately and contact an authorized service center.

51

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WIRING DIAGRAM
30K, 36K, 48K, 60K
345 345 345 34 5 345

52

T1 T2A T2B
T2 HEATER
BCD B CD
BCD BCD BCD

NOTE1: 1.The parts with dotted line indicates
optional features. 2.Remove the short connector of JR1
when you use the “on-off” function. 3.Remove the short connector of J1
when you use the “WATER LEVEL SWITCH” function.
4. This symbol indicates the element
is optional, the actual shape shall prevail.
UVLED OUTPUT

CODE ECM CAP FAN T1
T2 T2A T2B

WIRING DIAGRAM

PART NAME INDOOR ECM MOTOR INDOOR FAN CAPACITOR INDOOR FAN MOTOR
ROOM TEMP.SENSOR COIL TEMP.SENSOR INDOOR COIL INLET TEMP.SENSOR INDOOR COIL OUTLET TEMP.SENSOR

ECM
M
2

4(3) 3

CAP

M FAN

5

3

CN43 CN46 CN6

CN29

CN34 CN15

CN4

CN12

24V THERMOSTATS SETTING

CODE FACTORY SETTING

EF 0 1 2
S3
8
0~F

67 9A

ON
SW1
12 34 ON~OFF

ON
SW2
12 34 ON~OFF

ON
SW3
12 34 ON~OFF

ON
SW4
12 34 ON~OFF

FOR SETTING NET ADDRESS

S1+S2

EF 0 1 2

ON

67 9A

8

12

CODE

0~F

NETADDRESS

0~15

FACTORY SETTING

67 9A

EF 0 1 2

ON

8

12

0~F

16~31

67 9A

EF 0 12

ON

8

12

0~F

32~47

67 9A

EF 0 1 2

ON

8

12

0~F

48~63

ON
S4
12
ON~OFF

MAGNETIC RING
WIRE CONTROLLER 2 WIRE WIRE CONTROLLER

CN21

345
Y/G
345 345 345 345 345 345

DURASTAR.COM

ELECTRONIC 6 EXPANSION VALVE
6

CN10

J1

CN23 CN33 CN5

WATER LEVEL SWITCH

INDOOR UNIT MAINBOARD

CN22

RED TRANS RED

BLUE

RED

6

WORK ALARM

CN18

CN20 S1 S2

NOTE2:

1.The other switches should be set as Y/G “Off” state from factory.

2.The specific use of the switches please reference to the manual of application.

3.The CN5/CN23/CN33 connect to left and right terminals.

COMMUNICATION TO OUTDOOR UNIT

FOR SETTING POWER(DC MOTOR MODEL ONLY)

BCD

BCD

BCD

BCD

BCD

BCD

ENC1

EF 0 1 2

EF 0 1 2

EF 0 1 2

EF 0 1 2

EF 0 1 2

EF 0 1 2

67 9A

67 9A

67 9A

67 9A

67 9A

67 9A

8

8

8

8

CODE

4

5

7

8

CAPACTIY 53

54~71 72~90 91~105

FACTORY SETTING

ACCORDING TO RELATED MODEL

8
9 106~140

8
A 141~160

BCD

67 9A

EF 0 1 2
8
B 161

CN9

CN11
2

2 Y/G

RED BLACK

L1 L2
2
TO OUTDOOR UNIT OR POWER

16023000011626

CN4 CN5 AC:24V
R C L G Y1 Y/Y2 B W W1 W2 E/AUX DH

CN1

Remote

Control

4

4 Y/G 4

ON/OFF CN13 CN2

CN7

JR1

485 PORT

4
CN14

CN9 CN6

CN11 CN10

CN3
E Y X

24V THERMOSTAT

To CCM Comm.Bus

R

ERROR AND OPERATING CODES

Error Code

Description

EH 00 Indoor unit EEPROM parameter error

EL 01 Indoor / outdoor unit communication error

EL 16 Communication malfunction between adapter board and outdoor main board

EH 03 The indoor fan speed is operating outside of the normal range(for some models)

EH 60 Indoor room temperature sensor T1 is in open circuit or has short circuited

EH 61 Evaporator coil temperature sensor T2 is in open circuit or has short circuited

EH 62 Evaporator coil temperature sensor T2B is in open circuit or has short circuited

EH 65 Evaporator coil temperature sensor T2A is in open circuit or has short circuited

EL 0C Refrigerant Leakage Detection(for some models)

EH 0b Communication error between indoor two chips

EH 0E Water-level alarm malfunction

EC 53 Outdoor room temperature sensor T4 is in open circuit or has short circuited

EC 52 Condenser coil temperature sensor T3 is in open circuit or has short circuited

EC 54 EC 56 EC 51

Compressor discharge temperature sensor TP is in open circuit or has short circuited Evaporator coil outlet temperature sensor T2B is in open circuit or has short circuited(for freematch indoor units) Outdoor unit EEPROM parameter error

EC 07 The outdoor fan speed is operating outside of the normal range(for some models)

PC 00 IPM malfunction or IGBT over-strong current protection

PC 01 PC 02 PC 03

Over voltage or over low voltage protection Top temperature protection of compressor or High temperature protection of IPM module Low pressure protection (for some models)

PC 04 Inverter compressor drive error

EC 0d PC 0L

Outdoor unit malfunction Low ambient temperature protection

FL 09 Mismatch between the new and old platforms

©2024 Durastar

V2.0 0324

References

• Durastar - Reliable, evenly distributed temperature control solutions

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