Daikin DZ14XA User manual
INSTALLATION INSTRUCTIONS
DZ14XA SERIES
CONDENSING UNIT
IOD-1058B
11/2023
©2022-2023
www.daikincomfort.com
Important Safety Instructions
Shipping Inspection
accept claims from dealers for transportation damage or
Codes & Regulations
This product is designed and manufactured to comply
partial unit requirements for international standard IEC
WARNING
INJURY OR DEATH.
WARNING
WARNING
CAUTION
2
follow these regulations may harm the environment
NOTE:
NOTE:
Installation Clearances
there should
be a minimum of 60 inches between the top of the unit
Another important consideration in selecting a location for
60"
24"
24"
24"
24"
Rooftop Installations
NOTE: These units require special location consideration
3
Rigging
WARNING
`
NOTE:
skid and all protection and lifting material after the unit is in
Safe Refrigerant Handling
WARNING
WARNING
•
•
•
•
WARNING
•
•
•
•
WARNING
•
•
•
WARNING
CAUTION
Refrigerant Lines
NOTE:
Use only refrigerant grade (dehydrated and sealed)
Suct Liq Suct Liq Suct Liq
7 1/2 1 1/8 5/8 1 3/8 5/8 1 3/8 5/8
10 1 3/8 5/8 1 5/8 5/8 1 5/8 5/8
Cond Unit
(Tons)
REFRIGERANT LINE LENGTH (ft)
0-24
25-49*
50-74**
Line Diameter (In. OD)
than 50 feet
contact your local distributor for assistance.
Refrigerant Lines
NOTE:
Filter Drier and Sight Glass
supplied sight glass/moisture indicator on the liquid line as
Burying Refrigerant Lines
Enclose all underground portions of the refrigerant
If the lines must pass under or through a concrete
Refrigerant Line Connections
NOTE:
WARNING
5
WARNING
charge the system to 10 psi using the appropriate
System Evacuation
WARNING
necessary as some compressors create a mechanical
• If the pressure rises to 1000 microns or less and
•
same result is encountered check for leaks as
•
5000
3500
3000
2500
2000
1500
1000
500
10
MINUTES
ACUUM
IN
MICRONS
NO
NO CONDENSIBLES
Electrical Connections
WARNING
WARNING
NOTICE:
Rated
253
506
The condensing unit rating plate lists pertinent electrical
6
Example:
L2 – L3 = 216 V
Average Voltage: (220+216+213) / 3
649 / 3
Maximum Deviation from Average = 220 – 216 = 4
% Voltage Unbalance = 100 x (4 / 216)
= 400 / 216
Wire
Size
10 15 20 25 30 35
51 38 NR NR NR NR NR
12 122 81 61 NR NR NR NR
10 193 129 55 NR NR
8 205 123 103 88 68
6 326 195 163 122 109
Example:
A 7 ½ Ton unit is to be installed. The distance from the
building to the unit is 75’. Calculate the minimum wire size
assuming no more than 2% voltage drop.
MCA for 7 ½ Ton 230V unit = 43.3 (from S&R plate).
Applying previous table wire sizes less than #8 AWG
cannot be used for circuits which have a rating of 45A. The
#8 wire is not suitable since the maximum length for a 45A
circuit is 68’.
Solution: Use a #6 AWG wire suitable up to 109’.
NOTE: It is the contractors’s responsibility to follow the
NEC (USA) or CEC (Canada) when sizing the service wire
for this unit.
*Always refer to the unit’s S&R plate for actual ratings.
• Time delay fuses
•
NOTE:
WARNING
ensuring the suction pressure drops and discharge
NOTE:
NOTE:
S1 S2 R C O
T1
T2 T3 T5
R C O
THERMOSTAT
TERMINAL BLOCK - INDOOR UNIT
BLUE
RED
R
C
O
System Start Up
NOTE:
•
•
WARNING
CAUTION
NOTICE:
CAUTION
NOTE:
Expansion Valve Indoor Coils:
the refrigerant pressure and temperature at the outdoor
NOTE:
Measure the hot gas
discharge at the compressor to check the system charge in
Attach and insulate an electronic thermometer to
NOTE: The
8
additional minutes and measure the hot gas discharge
Adjust the charge until the hot gas temperature equals
NOTE:
mode (outdoor temperature of 60°
NOTE:
NOTE:
TUBING SIZE
TORQUE
(ft-lbs)
5/8 14
1 3/8 16
This heat pump uses a Time/Temperature method for
•
•
If the defrost cycle has not terminated after ten (10)
NOTE:
TROUBLESHOOTING ANALYSIS TABLE
COMPLAINT PROBABLE CAUSE REMEDY
High Head Pressure
1. Excessive charge of refrigerant in the
system.
2. Inadequate supply of air across the
condensor coil.
3. Non-condensate gases in the system.
1. Purge or pump-down excessive charge.
2. Make certain that coil is not fouled in any way, or
that air is not re-circulating.
3. Purge these gases from the system. Recharge
system, if necessary.
Low Head Pressure
1. System low on refrigerant.
2. Compressor valve broken.
1. Charge systen until sight glass is clear of bubbles.
2. Replace compressor.
Low Suction Pressure
1. Liquid line valve closed.
2. Restricted liquid line.
3. The bulb of the thermal expansion valve
has lost its charge.
4. System low on refrigerant.
5. Dirty filters.
6. Coil frosted up.
7. Flash gas in the liquid line.
8. Quantity of air through evaporator not
adequate.
1. Open the liquid line.
2. Replace filter-dryer.
3. Detach the bulb fron the suction line and hold in
one hand. If no liquid refrigerant goes through the
valve, replace the valve.
4. Test the unit for leaks. Add refrigerant until sight
glass is free from bubbles, after repairing leak.
5. Clean or replace filter.
6. Defrost and clean coil. Clean or replace filters.
7. Excessive liquid line drop. Check liquid line size.
8. Increase the blower speed.
High Suction Pressure
1. Expansion valve stuck open.
2. Expansion valve bulb not in contact with
suction line.
3. Suction and/or discharge valve leaking or
broken.
1. Correct valve action or replace the valve.
2. Fasten bulb securely to suction line.
3. Replace compressor.
Compressor will not
start.
1. Disconnect switch open (if equipped).
2. Blown fuse or fuse at disconnect switch (if
equipped).
3. Thermostat set too high.
4. Selector switch in "OFF" position.
5. Contactor and/or relay coils burned out.
6. Loose or open electrical connection in
either the control or power circuit.
1. Close the disconnect switch (if equipped).
2. Check the cause of failure and replace the fuse (if
equipped).
3. Adjust to lower temperature.
4. Turn selector switch knob to "Cool" position.
5. Replace contactor and/or relay.
6. Inspect and secure all electrical connections.
Solenoid does not energize
when voltage is present.
1. No voltage is present. 1. Replace the reversing valve.
Check the wiring
The valve will not shift.
1. Undercharged.
2. Valve body damage.
3. Valve sticking.
1. Check for leaks.
2. Replace the reversing valve.
3. Replace the reversing valve.
9
WARNING
Should the defrost thermostat fail to close after a
depending upon the position of the timing setting on
NOTE: If this short
After defrost has terminated (up to 10 minutes) check
WARNING
NOTE:
TROUBLESHOOTING
Qualied Installer/Servicer only
Common Causes for Unsatisfactory
Dirty Filters
Low Return Air Temperatures
Undercharging
Poor Termination of Defrost
Reversing Valve
1. Solenoid does not energize when voltage is
present
No voltage to the solenoid
3. The valve will not shift
10
DISCONNECT ALL OR INSTALLING THIS UNIT.
SOURCES BE AILURE TO DO SO
CAUSE INJURY OR DEATH.
L1 T1
CC
L2 T2
L3 T3
M
3~ COMP
CC COMPRESSOR CONTACTOR
CCHCRANKCASE HEATER
CCXCOMPRESSOR CONTACTOR AUXILIARY
CM CONDENSER MOTOR
COMP COMPRESSOR
CS COMPRESSOR SOLENOID (STAGE 2)
DFCB DEFROST CONTROL BOARD
DFTDEFORST TEMPERATURE SWITCH
GNDEQUIPMENT GROUND
HPSHIGH PRESSURE SWITCH
LPSLOW PRESSURE SWITCH
LVJB LOW VOLTAGE JUNCTION BOX
RV REVERSING VALVE
SSHR SECOND STAGE HEAT RELAY
COMPONENT LEGEND
RD
GND
LINE
VOLTAGE
208-230/460/3PH/60Hz
POWER AND CONTROLS WIRING DIAGRAM
DZ14XA 090-120, 3PH
NOTES
WIRE CODE
BK BLACK
BL BLUE
BL/PKBLUE WITH PINK STRIPE
BR BROWN
GR GREEN
OR ORANGE
PK PINK
PU PURPLE
RD RED
WH WHITE
YL YELLOW
YL/PKYELLOW WITH PINK STRIPE
HIGH VOLTAGE
LOW VOLTAGE
OPTIONAL HIGH VOLTAGE
OPTIONAL LOW VOLTAGE
CHASSIS GROUND
FIELD WIRING
FACTORY WIRING
HIGH VOLTAGE
LOW VOLTAGE
EARTH GROUND 0140R00759-B
L1
L3
L2YL
M
1~ CM
BK
BR
GR
A1 A2
CS
GR
YL
CCH
BL
YL
OR
BK
O-RV
R-PS1
R-DFT
PS2
R
O
C-RV
C
C
DFT
DF1
DF2
DFCB
W
CNT
Y
A1 A2
CC
BL
13
SSHR
BL
42
SSHR
WH
A1 A2
RV
PU
Y1 Y2 W1
OR
O R C
DFT
BK
BK
BK
BK
RD BL
BL
RD
OR
WH
YL
BL
BL
OR
YL
OR
WH
WH
WH
RD
RD
RD
YL/PK
BLRD
LPS
YL
BL
REPLACEMENT WIRE MUST BE SAME SIZE AND TYPE
OF INSULATION AS ORIGINAL (AT LEAST 105° C). USE
COPPER CONDUCTORS ONLY. USE N.E.C. CLASS 2
WIRE FOR ALL LOW VOLTAGE FIELD CONNECTIONS.
TO INDOOR UNIT'S LOW VOLTAGE TERMINAL BLOCK
AND THERMOSTAT. W1 WIRE IS USED TO COMMAND
THE INDOOR UNIT'S AUXILIARY HEAT (IF INSTALLED)
BR
LVJB
1
2
2
BL
WH WH
WH
WH
YL
BL
CCX
45
PU
YL
YL YL BL
HPS
BL/PK
YL
PU
BL/PK
YL/PK
YL
BK
BK
BK
11
12
©2022-2023
www.daikincomfort.com
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