DURASTAR DRAM18F2A Installation Manual

Multi-postional air handler: 18k - 24k btu

Hide thumbs Also See for DRAM18F2A:

Owner's manual (32 pages)

Table Of Contents

Table of Contents

Quick Links

Download this manual

INSTALLATION MANUAL

MULTI-POSTIONAL AIR HANDLER: 18K - 24K BTU

DRAM18F2A, DRAM24F2A

R-454B, 208/230V, 1ph 60HZ

Model Number:

Serial Number:

Purchase Date:

Installing Contractor Company Name:

NOTE

This manual only refers to the models listed above. If you are installing the DRUM1824S2A,

DRUM3036S2A, or DRUM4260S2A please refer to the manual included with that unit.

TIP

Capture relevant information about your Durastar mini-split equipment before it is

installed and write it above for future reference.

DURASTAR.COM

Table of Contents

Need help?

Do you have a question about the DRAM18F2A and is the answer not in the manual?

Questions and answers

Summary of Contents for DURASTAR DRAM18F2A

Page 1 This manual only refers to the models listed above. If you are installing the DRUM1824S2A, DRUM3036S2A, or DRUM4260S2A please refer to the manual included with that unit. Capture relevant information about your Durastar mini-split equipment before it is installed and write it above for future reference.
Page 2: Table Of Contents
DIP SWITCH SETTINGS ..........................44 DIP SWITCH DEFINITIONS ........................... 46 AIR VOLUME TABLE ............................48 OPTIONAL FUNCTION WIRING ........................ 48 FINAL CHECKS ..............................50 TEST RUN ................................51 TROUBLESHOOTING ............................52 WIRING DIAGRAMS ............................55 ERROR AND OPERATING CODES ......................56 DURASTAR.COM...
Page 3: Introduction
• 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.
Page 4: Important Safety Precautions
Do not operate your air conditioner in a wet room such as a bathroom or laundry room. Too much exposure to water can cause electrical components to short circuit. • If the air conditioner is used together with burners or other heating devices, thoroughly ventilate the room to avoid oxygen deficiency. DURASTAR.COM...
Page 5: Electrical Safety
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. DURASTAR.COM...
Page 6 When the refrigerant sensor malfunctions, the indoor unit will display the error code “FHCC”. The refrigerant sensor can not be repaired and can only be replaced by the manufacturer. It shall only be replaced with the sensor specified by the manufacturer. DURASTAR.COM...
Page 7 All training shall follow the ANNEX HH requirements of UL 60335-2-40 4th Edition. Examples for such working procedures are: • breaking into the refrigerating circuit; • opening of sealed components; • opening of ventilated enclosures. DURASTAR.COM...
Page 8: Work Procedure
Where electrical components are being changed, they shall be fit for the purpose and to the correct specification. At all times the manufacturer’s maintenance and service guidelines shall be followed. If in doubt consult the manufacturer’s technical department for assistance. The following checks shall be applied to installations using FLAMMABLE REFRIGERANTS: DURASTAR.COM...
Page 9 (25 % maximum) is confirmed. • Leak detection fluids are also suitable for use with most refrigerants but the use of detergents containing chlorine shall be avoided as the chlorine may react with the refrigerant and corrode the copper pipe-work. DURASTAR.COM...
Page 10: Charging Procedures
Prior to recharging the system it shall be pressure tested with OXYGEN FREE NITROGEN • (OFN). The system shall be leak tested on completion of charging but prior to commissioning. • A follow up leak test shall be carried out prior to leaving the site. DURASTAR.COM...
Page 11 If in doubt, the manufacturer should be consulted. In addition, a set of calibrated weighing scales shall be available and in good working order. Hoses shall be complete with leak-free disconnect couplings and in good condition. DURASTAR.COM...
Page 12 The effectiveness of signs should not be diminished by too many signs being placed together. Any pictograms used should be as simple as possible and contain only essential details. Disposal of equipment using flammable refrigerants: See national regulations. Storage of equipment/appliances: The storage of the appliance should be in accordance with DURASTAR.COM...
Page 13: Additional Precautions
Composition: R-454B is classified as safety group A2L per ASHRAE Standard 34. Verify that service equipment and instruments are certified for use with group A2L refrigerants, and in particular with R-454B is a non-azeotropic mixture of 68.9% by weight difluorometh ane (HFC- 32) and 31.1 % by weight 2,3,3,3-tetrafluoro-1-propene (HFO-1234yf). DURASTAR.COM...
Page 14 WARNING: The minimum room area or the minimum room area of conditioned space is based on releasable charge and total system refrigerant charge. When the unit detects a refrigerant leak, the minimum airflow of the indoor unit is as follows : Model DRAM18F2A DRAM24F2A Nominal Air 400 CFM...
Page 15 0.80 in WC or 200Pa and 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: Model DRAM18F2A DRAM24F2A Pressure 0.5 in-H2O (125 Pa) 0.5 in-H2O (125 Pa)
Page 16: Compatibility And Specification Overview
3/8 (9.52) 5/8 (15.9) NOTE The DRAM air handlers are also multizone compatible. Check the multi-zone compatibility chart on Durastar.com for allowed combinations. NOTE Line sets fot the 18k-24k air handlers must be double insulated (DI). 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.
Page 17: Accessories
Controller (DRSTAT101) NOTE The Durastar wired control (DRSTAT101) 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.
Page 18: Tools Needed
Wire crimper • Flaring tool • Burr reamer UNIT DIMENSIONS DIMENSIONS MODEL A (Height) B (Depth) C (Width) in (mm) in (mm) in (mm) in (mm) in (mm) DRAM18F2A, 17-1/2 15-3/4 10-1/4 45 (1143) 21 (533) DRAM24F2A (445) (400) (260) DURASTAR.COM...
Page 19: Filter Size
FILTER SIZE MODEL DRAM18F2A, DRAM24F2A WIDTH (in (mm)) 16 (406) DEPTH (in (mm)) 20 (508) THICKNESS (in (mm)) 1 (25) PARTS IDENTIFICATION Air Outlet Wire Knockouts Electrical Components Electrical Heater Compartment Blower Fan and Motor Suction Line Liquid Line Evaporator...
Page 20: Installation Preparation
• 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. DURASTAR.COM...
Page 21: Horizontal Installations
Horizontal installations 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. Vertical installations DURASTAR.COM...
Page 22: Airflow Direction
At least 3in(76mm) Make sure wiring Vertical up Horizontal is not laying in the pan. Airflow Direction Horizontal left Horizontal right Upﬂow Downﬂow NOTE Vertical up and horizontal left installations do not need to change the direction of the evaporator. DURASTAR.COM...
Page 23: Step 1. Remove The Filter
STEP 1. REMOVE THE FILTER STEP 2. REMOVE THE UPPER COVER Remove the filter door, then take the filter out. STEP 3. REMOVE THE EVAPORATOR COVER PLATE Remove the bottom cover first, then remove the cover plate. cover plate bottom cover DURASTAR.COM...
Page 24 WIRE TIES ON THE T1, T2, AND RDS T2, AND RDS FROM THE CONTROL SENSOR CABLES. BOARD Loosen wire ties clamping wires to the coil as T1: Room temperature sensor necessary to give slack. T2: Evaporator central sensor plug (only some models) RDS: Refrigerant detection sensor DURASTAR.COM...
Page 25 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. DURASTAR.COM...
Page 26 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. DURASTAR.COM...
Page 27 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. DURASTAR.COM...
Page 28: Air Handler Installation
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. Electrical Control Box Upper Cover Suction Line Liquid Line Horizontal Drains Vertical Drains DURASTAR.COM...
Page 29: Duct Requirements
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. DURASTAR.COM...
Page 30: Condensate Piping Installation
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. DURASTAR.COM...
Page 31: Vertical Installation
Drain Anti-syphon Vent Vent T Angle Down 1/50 Drain Trap 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. DURASTAR.COM...
Page 32: Refrigerant Piping Connection
The refrigerant should be charged from the service port on the outdoor unit's low pressure valve. Additional refrigerant information can be found in the SUBMITTAL DOCUMENTS at WWW.SERVICE.DURASTAR.COM. Additional refrigerant can be calculated using the following chart and formula:...
Page 33: Important Note
Indoor unit/ Outdoor unit Suction Line Oil Trap Unit < 36k then 20ft (6m) Unit > 36k then 32ft (10m) Liquid Line Indoor unit/ Outdoor unit Unit < 36k then 20ft (6m) Unit > 36k then 32ft (10m) DURASTAR.COM...
Page 34: Step 2: Remove Burrs
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. DURASTAR.COM...
Page 35 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. DURASTAR.COM...
Page 36: Step 4: Connect Pipes
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. DURASTAR.COM...
Page 37 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). Foam Tape Braze Connection Flare Connection DURASTAR.COM...
Page 38: Wiring Overview
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.
Page 39: Indoor Unit Wiring
• 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. DURASTAR.COM...
Page 40 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 DURASTAR.COM...
Page 41: Wiring Methods
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. Motor MCA 208/230V Indoor Motor Model Number MOCP (A) Output RLA (A) DRAM18F2A DRAM24F2A DURASTAR.COM...
Page 42: Control Logic
Fan-ON mode will not work. • The heat pump will turn on when emergency heat or electric heat is turned on. • When two AHUs are on the same multi-zone, one counts as an "other IDU" above. DURASTAR.COM...
Page 43: Led Display Definitions
Heater Kit 1 and Kit 2 Emergency Heat Turbo Heating Zone Control Heating Zone Control Heating Zone Control Note: 1 = 24V Signal 0 = No 24V Signal The AHU will turn off if the 24V input cannot meet the table. DURASTAR.COM...
Page 44: Dip Switch Settings
UNIT MUST BE POWERED OFF BEFORE ADJUSTING SWITCHES TOP OF BOARD Function rotary switch Function DIP switch Static pressure DIP switch UVLED KEY1 Connection (CN43) Function DIP switch Humidistat (CN23) display Alarm Connection (CN33) Non-polar wired controller HA/HB (DRSTAT101) DURASTAR.COM...
Page 45 TOP OF BOARD Water level sensor connection (CN23) Water level sensor jumper (J7) Control Scenarios Use the following two charts to make dip switch changes based on the chosen control scenario. 24V Thermostat Control Scenario DRSTAT101 Wired Controller DURASTAR.COM...
Page 46: Dip Switch Definitions
SW4-2 ON, SW4 -3 OFF] = 010 Temperature differential to Only valid for activate third stage auxiliary product which heating(the GAP of T1 and Ts) SW4-4 6°F(3°C) [Default]8°F(4°C) has three Wire controller demand with stage auxiliary heat pump+ Electric heat heating. working together DURASTAR.COM...
Page 47 When using a 24V thermostat, use the SW4 dip switch to set the proper air flow and heater settings. 000 is the default SW4-1 Can be set as SW4-2 000/001/010/ 011/100/101/110/111, for electric heating and PSC classification SW4-3 depending on the unit. DURASTAR.COM...
Page 48: Air Volume Table
10kW, 8kW SW4-2=ON W1, W2, AUX SW4-2=ON Heat + AUX, AUX heat module 2 SW4-3=OFF SW4-3=OFF off the system. SW4-1=OFF SW4-1=OFF Electric auxiliary SW4-2=ON W1, W2, AUX SW4-2=ON Heat + AUX, AUX heat module 3 SW4-3=ON SW4-3=ON DURASTAR.COM...
Page 49: Alarm Output
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...
Page 50: Final Checks
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. DURASTAR.COM...
Page 51: Test Run
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. DURASTAR.COM...
Page 52: Troubleshooting
This noise is normal and is caused by the refrigerant gas and outdoor unit make stopping or changing direction. noises Squeaking sound: Normal expansion and contraction of plastic and met- al parts caused by temperature changes during operation can cause squeaking noises. DURASTAR.COM...
Page 53 • 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. DURASTAR.COM...
Page 54 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. DURASTAR.COM...
Page 55: Wiring Diagrams
WIRING DIAGRAMS DRAM18F2A, DRAM24F2A DURASTAR.COM...
Page 56: Error And Operating Codes
Mismatch between the new and old platforms PC00 ODU IPM module protection PC01 ODU voltage protection PC02 Compressor top (or IPM) temp. protection PC03 Pressure protection (low or high pressure) PC04 Inverter compressor drive error PC0L Low ambient temperature protection ---- IDUs mode conflict DURASTAR.COM...
Page 57 THIS PAGE INTENTIONALLY LEFT BLANK. DURASTAR.COM...
Page 58 THIS PAGE INTENTIONALLY LEFT BLANK. DURASTAR.COM...
Page 59 THIS PAGE INTENTIONALLY LEFT BLANK. DURASTAR.COM...

This manual is also suitable for:

Dram24f2a

DURASTAR DRAM18F2A Installation Manual

Quick Links

Need help?

Questions and answers

Subscribe to Our Youtube Channel

Related Manuals for DURASTAR DRAM18F2A

Summary of Contents for DURASTAR DRAM18F2A

This manual is also suitable for:

Table of Contents