Daikin DZ18VC Series Installation Instructions Manual
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Daikin DZ18VC Series Installation Instructions Manual

Heat pump unit
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HEAT PUMP UNIT
DZ18VC HEAT PUMP
INSTALLATION & SERVICE REFERENCE
Important Safety Instructions .................................... 1
Shipping Inspection ........................................................ 1
Codes & Regulations ...................................................... 2
Features ........................................................................... 2
Installation Clearances ............................................... 2
Rooftop Installations ................................................... 2
Safe Refrigerant Handling .......................................... 3
Refrigerant Lines .......................................................... 3
Refrigerant Line Connections .................................... 5
System Start-up Procedure ......................................... 5
Electrical Connections ................................................ 6
Wiring Diagram [2-5 Ton] ............................................. 11
Capacitor ....................................................................... 12
Troubleshooting .......................................................... 16
Setting The Mode Display ........................................... 18
7-Segment Display ........................................................ 24
Start Up Checklist ....................................................... 28
CTK04 Addendum ........................................................... 30
PROP 65 WARNING
FOR CALIFORNIA CONSUMERS
Cancer and Reproductive Harm -
www.P65Warnings.ca.gov
IOD-4016H
4/2020
Index
WARNING
Our continuing commitment to quality products may mean a change in specifications without notice.
© 2015 - 2016, 2018, 2020
19001 Kermier Rd., Waller, TX 77484

Important Safety Instructions

The following symbols and labels are used throughout this
manual to indicate immediate or potential safety hazards. It
is the owner's and installer's responsibility to read and comply
with all safety information and instructions accompanying
these symbols. Failure to heed safety information increases
the risk of personal injury, property damage, and/or product
damage.
HIGH VOLTAGE !
D
ISCONNECT
M
ULTIPLE POWER SOURCES MAY BE PRESENT
TO DO SO MAY CAUSE PROPERTY DAMAGE
INJURY OR DEATH
O
NLY PERSONNEL THAT HAVE BEEN TRAINED TO INSTALL
(
REPAIR
HEREINAFTER
SHOULD SERVICE THE EQUIPMENT
FOR ANY INJURY OR PROPERTY DAMAGE ARISING FROM IMPROPER SERVICE OR
SERVICE PROCEDURES
FOR ANY INJURY OR PROPERTY DAMAGE WHICH MAY RESULT
JURISDICTIONS THAT REQUIRE ONE OR MORE LICENSES TO SERVICE THE EQUIPMENT
SPECIFIED IN THIS MANUAL
. I
EQUIPMENT
THE EQUIPMENT SPECIFIED IN THIS MANUAL
SERVICE OR REPAIR THE EQUIPMENT SPECIFIED IN THIS MANUAL WITHOUT PROPER
TRAINING MAY RESULT IN PRODUCT DAMAGE
INJURY OR DEATH
T
HE UNIT HAS ITS OWN
WHILE VACUUMING THE UNIT
ELECTRICAL ARCING

Shipping Inspection

Always keep the unit upright; laying the unit on its side or top
may cause equipment damage. Shipping damage, and sub-
sequent investigation is the responsibility of the carrier. Verify
the model number, specifications, electrical characteristics,
and accessories are correct prior to installation. The distributor
or manufacturer will not accept claims from dealers for trans-
portation damage or installation of incorrectly shipped units.
0140M00517-A
www.daikincomfort.com
INSTALLATION INSTRUCTIONS
WARNING
ALL
POWER BEFORE SERVICING
,
.
, "
")
SERVICE
THE EQUIPMENT SPECIFIED IN THIS MANUAL
. T
HE MANUFACTURER WILL NOT BE RESPONSIBLE
. I
,
F YOU SERVICE THIS UNIT
,
ONLY LICENSED PERSONNEL SHOULD SERVICE THE
,
MPROPER INSTALLATION
ADJUSTMENT
,
OR ATTEMPTING TO INSTALL
,
PROPERTY DAMAGE
.
CAUTION
P
-
. U
UMP
DOWN MODE
. V
ACUUMING TOO LOW CAN CAUSE INTERNAL
,
RESULTING IN A DAMAGED OR FAILED COMPRESSOR
.
. F
AILURE
PERSONAL
,
,
ADJUST
SERVICE OR
YOU ASSUME RESPONSIBILITY
. I
,
N ADDITION
IN
,
SERVICING OR REPAIR OF
,
,
ADJUST
,
PERSONAL
P
-
SE THE
UMP
DOWN MODE
.

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Summary of Contents for Daikin DZ18VC Series

  • Page 1: Table Of Contents

    INSTALLATION INSTRUCTIONS HEAT PUMP UNIT Important Safety Instructions The following symbols and labels are used throughout this DZ18VC HEAT PUMP manual to indicate immediate or potential safety hazards. It INSTALLATION & SERVICE REFERENCE is the owner’s and installer’s responsibility to read and comply with all safety information and instructions accompanying these symbols.

  • Page 2: Codes & Regulations

    Consult all appropriate regulatory codes prior to deter- models. Specification sheets can be found at www.daikincom- mining final clearances. fort.com for Daikin products. Within the website, please select Another important consideration in selecting a location for the the residential or commercial products menu and then select unit(s) is the angle to obstructions.

  • Page 3: Safe Refrigerant Handling

    Electrical Noise The unit should be well grounded so that potential effects of WARNING electrical noise from the inverter to surrounding equipment can be minimized. O AVOID POSSIBLE EXPLOSION •N EVER APPLY FLAME OR STEAM TO A REFRIGERANT CYLINDER F YOU When selecting an installation location, keep sufficient dis- MUST HEAT A CYLINDER FOR FASTER CHARGING PARTIALLY IMMERSE...
  • Page 4 Where possible, drain as much residual compressor oil from RECOMMENDED existing systems, lines, and traps; pay close attention to low INTERCONNECTING TUBING (Ft) areas where oil may collect. NOTE: If changing refriger- ant, the indoor coil and metering device must be replaced. Line Set Length 0 - 125' Equivalent Only DV**PEC air handlers are compatible and have been...

  • Page 5: Refrigerant Line Connections

    To locate leaks, pressure test the system using dry nitrogen or service valves before brazing tubes to the valves. Use a leak detector fluid per Daikin’s recommendation. If you wish brazing alloy of 2% minimum silver content. Do not use flux.

  • Page 6: Electrical Connections

    Low Voltage Connections The unit is designed to work as part of a fully communicating HVAC system, utilizing a Daikin approved communicating thermostat, communicating indoor unit, and up to four wires. Route control wires through the low voltage port and termi- nate in accordance with the wiring diagram provided inside the control panel cover.
  • Page 7 “R” (24 VAC hot) and “C” (24 VAC common). IN CASE OF AIR HANDLER IN CASE OF COIL Communica�ng Thermostat Communica�ng Thermostat (In case of Daikin One+ Smart (In case of Daikin One+ Smart Thermostat) Thermostat) 125 �. (*) 125 �. (*)
  • Page 8 Low voltage terminal C from indoor unit must connect to low voltage terminal C on thermostat and low voltage terminal R on thermostat. Verify wires are not reversed. NOTE: The order of the terminals of the indoor unit and the Daikin One+ Smart Thermostat are different. See System Wiring. •...
  • Page 9 Step 3. System Start-up NOTICE For a detailed procedure, please visit the Daikin One+ Smart HECK THE CHRADER PORTS FOR LEAKS AND TIGHTEN VALVE CORES Thermostat website at http://www.daikinone.com. NECESSARY NSTALL CAPS FINGER TIGHT If Installing with a CTK04 thermostat, please see the adden- NOTICE dum for further instructions.
  • Page 10 These advanced features are organized into a menu structure. For detailed functions and menu layout, please visit the Daikin One+ Smart Thermostat website at http://www.daikinone.com. (If using a CTK04 thermostat, please see the addendum for further...

  • Page 11: Wiring Diagram [2-5 Ton]

    Wiring Diagram [2-5 Ton] DZ18VC0241**, DZ18VC0361**, DZ18VC0481**, DZ18VC0601** COIL CIRCUIT DEFROST LIQUID LINE DISCHARGE LINE Wiring is subject to change. Always refer to the wiring diagram on the unit for the most up-to-date wiring.

  • Page 12: Capacitor

    Capacitor WARNING VOID CONTACT WITH THE CHARGED AREA •N EVER TOUCH THE CHARGED AREA BEFORE CONFIRMING THAT THE RESIDUAL VOLTAGE IS VOLTS OR LESS 1. S HUT DOWN THE POWER AND LEAVE THE CONTROL BOX FOR MINUTES 2. M AKE SURE TO TOUCH THE ARTH GROUND TERMINAL TO RELEASE THE STATIC ELECTRICITY FROM YOUR BODY TO PREVENT FAILURE OF THE...
  • Page 13 Capacitor WARNING VOID CONTACT WITH THE CHARGED AREA •N EVER TOUCH THE CHARGED AREA BEFORE CONFIRMING THAT THE RESIDUAL VOLTAGE IS VOLTS OR LESS 1. S HUT DOWN THE POWER AND LEAVE THE CONTROL BOX FOR MINUTES 2. M AKE SURE TO TOUCH THE ARTH GROUND TERMINAL TO RELEASE THE STATIC ELECTRICITY FROM YOUR BODY TO PREVENT FAILURE OF THE...
  • Page 14 HEATING ANALYSIS CHART POSSIBLE CAUSE X IN ANALYSIS GUIDE INDICATE "POSSIBLE CAUSE" Liquid stop valve does not fully open Gas stop valve does not fully open Line set restriction Line set length is too long Blocked filter-dryer OD EEV coil failure OD EEV failure ID EEV coil failure ID EEV failure...
  • Page 15 COOLING ANALYSIS CHART POSSIBLE CAUSE X IN ANALYSIS GUIDE INDICATE "POSSIBLE CAUSE" Liquid stop valve does not fully open Gas stop valve does not fully open Line set restriction Line set length is too long Blocked filter-dryer OD EEV coil failure OD EEV failure ID EEV coil failure ID EEV failure...

  • Page 16: Troubleshooting

    Troubleshooting NOTE: For detailed information on the initary error codes, please visit the Daikin One+ Smart Thermostat website at http://www.daikinone.com. If installing with CTK04 thermostat, please see the addendum for further information.
  • Page 17 Troubleshooting Network Troubleshooting If a network communication error has occured, use the fol- lowing steps to help troubleshoot the system. (For network communication error codes, refer to the table below and the tables of error codes for outdoor unit and infoor unit.) After any wiring changes have been made or DS1 dip switches The integrated contol module has some onboard tools that on the outdoor unit control board have been changed, apply...

  • Page 18: Setting The Mode Display

    Setting The Mode Display MODE DISPLAY INTRODUCTION A 3-digit display is provided on the printed circuit board (PCB) as a backup tool to the thermostat for reading faults, fault history, monitoring and setting up the condensing unit. Follow the information provided in this section to learn how to use the mode display.
  • Page 19 Setting The Mode Display NAVIGATING THROUGH THE DISPLAY SCREENS SCREEN ZERO The home or default screen on the display. This shows the most recent fault. SCREEN ONE To access, hold the RECALL button from screen zero - 5 seconds. SCREEN TWO To access, hold the RECALL button from screen one - 5 seconds.
  • Page 20 Setting The Mode Display FAULT CODE HISTORY NAVIGATION < SCREEN ONE > This mode will allow the user to see the six most recent system faults. For a list of the fault codes, please see the TROUBLESHOOTING tables in this document. <...
  • Page 21 Setting The Mode Display MONITORING MODE NAVIGATION < SCREEN ZERO > < SCREEN TWO > This screen allows the user to monitor system variables as shown in the tables at the end of this section. Blink interval: < SCREEN ONE > 0.4 sec.
  • Page 22 Setting The Mode Display SETTINGS MODE 1 NAVIGATION < SCREEN THREE > < SCREEN ZERO > Setting Mode 1 allows the user to adjust system settings as shown in the tables at the end of this section. Blink interval: < SCREEN TWO > 0.4 sec.
  • Page 23 Setting The Mode Display SETTINGS MODE 2 < SCREEN FOUR > < SCREEN ZERO > Setting Mode 2 allows the user to change system settings. See table in back of this section. Blink interval: 0.4 sec. On - 0.4 sec. Off <...

  • Page 24: 7-Segment Display

    7-Segment Display SCREEN 0 (Display FAULT CODE) Setting Contents Notes Fault code (present) SCREEN 1 (Display FAULT CODES) Setting Contents Notes Fault code (latest) Latest Fault code (2nd) Fault code (3rd) Fault code (4th) Fault code (5th) Fault code (6th) SCREEN 2 (MONITOR MODE) Setting Contents...
  • Page 25 7-Segment Display SCREEN 3 (SETTING MODE 1) Setting Contents Setting Installer/Serviceman Notes 0:-15% 5:0% 8:9% 1:-12% 6:3% 9:12% 2:-9% 7:6% 10:15% Cool Airflow Trim High 3:-6% 4:-3% 0:-15% 5:0% 8:9% 1:-12% 6:3% 9:12% 2:-9% 7:6% 10:15% Cool Airflow Trim Int 3:-6% 4:-3% 0:-15%...
  • Page 26 7-Segment Display SCREEN 4 (SETTING MODE 2) Setting Contents Setting Installer/Serviceman Notes 0: 30min. 1: 60min. Maximum Defrost Interval 2: 90min. 3: 120min. Set Maximum Current Future Use 0:Same Level 1:Outdoor Lower Vertical Rise 2:Indoor Lower System Verification Test 0:ON 1:OFF 1:OFF Force Defrost Cycle...
  • Page 27 SPLIT SYSTEMS AIR CONDITIONING AND HEAT PUMP HOMEOWNER’S ROUTINE MAINTENANCE RECOMMENDATIONS We strongly recommend a bi-annual maintenance checkup be performed before the heating and cooling seasons begin by a qualified servicer. Replace or Clean Filter Clean Outside Coil (Qualified Servicer Only) IMPORTANT NOTE: Never operate unit without a filter in- stalled as dust and lint will build up on internal parts resulting in loss of efficiency, equipment damage and possible fire.

  • Page 28: Start Up Checklist

    Verify that the outdoor unit has been energized for 2 hours. Verify all accessories are installed and operating correctly. Check filters and replace if necessary. Verify the installation of the thermostat. A Daikin approved communicating thermostat is the only approved thermostat for the unitary inverter unit.
  • Page 29 Start-up Checklist For Unitary Inverter Start-Up (Insert the values as each item is completed.) ELECTRICAL Supply Voltage L1 - L2 Compressor Amps Blower Amps Condenser Fan Amps BLOWER EXTERNAL STATIC PRESSURE Return Air Static Pressure IN. W.C. Supply Air Static Pressure IN.

  • Page 30: Ctk04 Addendum

    CTK04 Addendum Two Wire Outdoor, Four-Wire Indoor Wiring Low voltage wiring consists of two wires between the indoor unit and heat pump and four wires between the indoor unit and thermostat. The required wires are data lines 1 and 2, “R” (24 VAC hot) and “C” (24 VAC common). Never connect the power wiring to communication terminal (1, 2, R, C).
  • Page 31 System Start-up Test NOTICE N INITIAL POWER START THE OUTDOOR UNIT WILL DISPLAY CODE E11, SYSTEM SIGNALING THAT INITIAL TEST MUST BE RUN OLLOW ™ OMFORT SETUP SCREEN TO ENTER APPLICATION UNIQUE INFORMATION OMFORT ET THERMOSTAT MANUAL FOR DETAILED INFORMATION A system test is now required to check the equipment settings and functionality.
  • Page 32 4. From the MENU screen, scroll down and select COMFORTNET™ USER MENU. 5. Enter Installer password. (The password is the Date Code located on the thermostat and is available by entering the EQUIPMENT STATUS menu and scrolling to the bottom.) 6.
  • Page 33 8. Next, scroll down and select EQUIP TEST. 9. Select SYSTEM TEST. 10. Select ON to run the SYSTEM TEST. Press DONE to initiate test. 11. Allow the system test to run for its duration (5-15 minutes). EQUIP TEST SCREEN will show the system test is ON once selected.
  • Page 34 12. Press Previous Menu button and navigate to HOME screen and allow test to finish. The display similar to the one at the right will be displayed after SYSTEM TEST completes. Test is complete only when CODE 11 notice clears from BOTH the thermostat display AND the seven segment LED display on the outdoor unit.
  • Page 35 3. Enter Installer password. (The password is the Date Code located on the thermostat and is available by entering the EQUIPMENT STATUS menu and scrolling to the bottom). 4. Select YES to continue. 5. Select HEAT PUMP. 6. Select MAINTENANCE. COOL SET-UP...
  • Page 36 7. Select CHARGE MODE. 8. Select ON. Press DONE to initiate CHARGE MODE. (System will then run for 1 hour and either return to cooling or heating mode depending if the thermostat is set to COOL or HEAT MODE from the SYSTEM menu on the main screen.
  • Page 37 Adjust Refrigerant Level NOTICE Using service equipment, add or recover refrigerant according HECK THE CHRADER PORTS FOR LEAKS AND TIGHTEN VALVE CORES to the calculation. Allow system to stabilize for 20 minutes NECESSARY NSTALL CAPS FINGER TIGHT after adjusting charge level. NOTICE Measure Subcooling to Verify Proper Charge ADJUST THE CHARGE BASED ON SUCTION PRESSURE UNLESS...
  • Page 38 Backup Heat Lockout Compressor Lockout Temperature Temperature (F°) In order to access temperature, the compressor lockout and the backup heat lockout, press MENU and scroll down to press INSTALLER OPTIONS. Enter the date code (password) when prompted. Choose VIEW / EDIT CURRENT SETUP and COMPRESSOR LOCKOUT / BALANCE POINT will be under HEAT / COOL CONTROL OPTIONS.
  • Page 39 3. Enter Installer password if known. a. The password is the thermostat date code and can be obtained by selecting the red Cancel button and selecting the Dealer Information button. b. Once recorded, click the green OK button and return to the previous step.
  • Page 40 7. BOOST MD turns BOOST MODE OFF or ON. BOOST MODE is ON by default. 105°F ...Heat Pump > SYS SETUP > BOOST MD 8. BOOST TEMP adjusts the activation temperature from 70° to 105°. “Always ON” option is also available to permanently engage BOOST MODE.
  • Page 41 Once satisfied with BOOST MODE adjustments, navigate to the HOME screen by selecting the Previous Menu button three times then selecting HOME. DEHUMIDIFICATION 9. Additional Dehumidification operational options can be The thermostat reads the indoor humidity level from the selected in the resulting window. CTK04 and allows the user to set a dehumidification target 10.
  • Page 42 and between subsystems is the key to unlocking the benefits Time Stamp and features of the ComfortNet system. Mode Two-way digital communications is accomplished using only two wires. The thermostat needs 24 VAC for power. 4 wires Compressor Reduction Mode between the indoor unit and thermostat plus two wires be- Requested and Actual % Demand tween the indoor unit and outdoor unit are all that are required...
  • Page 43 System Setup • Profile C ramps up to 82% of the full cooling demand airflow and operates there for approximately 7 1/2 This menu allows for the setting of BOOST MODE. BOOST minutes. The motor then steps up to the full demand MODE enables the system to operate at a higher compressor airflow.
  • Page 44 Heat Pump Advanced Feature Menu DIAGNOSTICS INDICATION/USER SUBMENU ITEM COMMENTS MODIFIABLE OPTIONS Clear Faults NO or YES Selecting "YES" clears the fault history. Fault 1 Most recent HP fault Fault 2 2nd most recent HP fault Fault 3 3rd most recent HP fault Fault 4 4th most recent HP fault Fault 5...
  • Page 45 Heat Pump Advanced Feature Menu SYSTEM SETUP (SYS SETUP) USER MODIFIABLE SUBMENU ITEM COMMENTS OPTIONS Reset System Setup Options to NO or YES Selecting "YES" resets this menu to factory default Factory Defaults settings. SET MAX CURRENT Future use. If the outdoor & indoor units are within +/- 15 ft. vertical distance, select SAME LEVEL.
  • Page 46 Heat Pump Advanced Feature Menu COOL SETUP SUBMENU ITEM USER MODIFIABLE OPTIONS COMMENTS CL Reset YES or NO Selecting to default factory setting. Cool Airflow Trim Hi -15% to +15% in 3% increments Selects the cooling airflow trim amount. Cool Airflow Trim Int -15% to +15% in 3% increments Selects the cooling airflow trim amount.
  • Page 47 Troubleshooting ClimateTalk PCB LED Transmitted ClimateTalk Thermostat Fault Probable Causes Corrective Actions Fault Code Display Message ● High electrical noise OD CTRL FAIL1 Indicates a general memory error. ● Replace control board if necessary ● Faulty control board ● Blocked/restricted condenser coil and/or ●...
  • Page 48 Troubleshooting ClimateTalk PCB LED Transmitted ClimateTalk Thermostat Fault Probable Causes Corrective Actions Fault Code Display Message ● Discharge thermistor inoperable or This error indicates the equipment is improperly connected ● Check discharge thermistor resistance and experiencing frequent high discharge ● Discharge thermistor is put on incorrect connections;...
  • Page 49 Troubleshooting ClimateTalk PCB LED Transmitted ClimateTalk Thermostat Fault Probable Causes Corrective Actions Fault Code Display Message ● Check installation clearances. ● Short circuit condition ● Check the opening of stop valve, should be full open; ● Stop valve not completely open Repair/replace if needed HIGH CURRENT Board detected a high current condition.
  • Page 50 Troubleshooting ClimateTalk PCB LED Transmitted ClimateTalk Thermostat Fault Probable Causes Corrective Actions Fault Code Display Message ● Check and clean grille of any debris This error indicates the equipment is experiencing ● Obstruction in fan rotation ● Check wiring from Outdoor fan motor to control board; frequent outdoor control board and/or motor faults.
  • Page 51 THIS PAGE LEFT INTENTIONALLY BLANK...
  • Page 52 CUSTOMER FEEDBACK Daikin is very interested in all product comments. Please fill out the feedback form on the following link: https://daikincomfort.com/contact-us You can also scan the QR code on the right to be directed to the feedback page. PRODUCT REGISTRATION Thank you for your recent purchase.

This manual is also suitable for:

Dz18vc0241 seriesDz18vc0361 seriesDz18vc0481 seriesDz18vc0601 series

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