Daikin DFC Series User manual

RECOGNIZE THIS SYMBOL
AS A SAFETY PRECAUTION.
outdoor 

       

*NOTE:  

DFC SERIES
Packaged Heating and cooling Unit
15 to 25 ton
Our continuing commitment to quality products may mean a change in specications without notice.
IOD-1054A
09/2022
Index
.................................................................2
Replacement Parts ................................................................2
 ..............................................................2
.........................................................................4
Clearances.............................................................................6
.........................................6
....................................................6
Rigging Details.......................................................................6
Electrical Wiring ....................................................................7
.......................................................9
 ...............................................9
 .......................................10
...........................................................11
NOTE: 25 ton model shown in picture.
20 ton model has 4 fans
15 ton model has 3 fans
INSTALLATION INSTRUCTIONS
©2022
19001 Kermier Rd. Waller, TX 77484
www.daikincomfort.com
ONLY PERSONNEL THAT HAVE BEEN TRAINED TO INSTALL,
ADJUST, SERVICE, MAINTENANCE OR REPAIR
(HEREINAFTER, “SERVICE”) THE EQUIPMENT SPECIFIED IN
THIS MANUAL SHOULD
SERVICE THE EQUIPMENT. THE MANUFACTURER WILL
NOT BE RESPONSIBLE FOR ANY INJURY OR PROPERTY
DAMAGE ARISING FROM IMPROPER SERVICE OR SERVICE
PROCEDURES. IF YOU SERVICE THIS UNIT, YOU ASSUME
RESPONSIBILITY FOR ANY INJURY OR PROPERTY
DAMAGE WHICH MAY RESULT. IN ADDITION, IN
JURISDICTIONS THAT REQUIRE ONE OR MORE LICENSES
TO SERVICE THE EQUIPMENT SPECIFIED IN THIS
MANUAL, ONLY LICENSED PERSONNEL SHOULD SERVICE
THE EQUIPMENT.
IMPROPER INSTALLATION, ADJUSTMENT, SERVICING,
MAINTENANCE OR REPAIR OF THE EQUIPMENT SPECIFIED
IN THIS MANUAL, OR ATTEMPTING TO INSTALL, ADJUST,
SERVICE OR REPAIR THE EQUIPMENT SPECIFIED IN THIS
MANUAL WITHOUT PROPER TRAINING MAY RESULT IN
PRODUCT DAMAGE, PROPERTY DAMAGE, PERSONAL
INJURY OR DEATH.
WARNING
WARNING
DO NOT BYPASS SAFETY DEVICES

2
SAFETY INSTRUCTIONS


         
       


WARNING
To avoid property damage, personal injury or death, do not
use this unit if any part has been under water. Immediately
call a qualified service technician to inspect the furnace
and to replace any part of the control system and any gas
control having been under water
CAUTION
Sheet metal parts, screws, clips and similar items inherently
have shart edges, and it is necessary that the installer and
servicer personnel exercise caution.
WARNING
Do not connect to or use any device that is not design cer-
tified by the manufacturer for use with this unit. Serious
property damage, personal injury, reduced unit performance
and/or hazardous conditions may result from the use of such
non-approved devices.
WARNING
This unit must not be used as a “construction heater” during
the finishing phases of construction on a new structure. This
type of use may result in premature failure of the unit due
to extremely low reurn air temperatures and exposure to
corrosive or very dirty atmospheres.
WARNING
HIGH VOLTAGE
DISCONNECT ALL POWER BEFORE SERVICING
OR INSTALLING THIS UNIT. MULTIPLE POWER
SOURCES MAY BE PRESENT. FAILURE TO DO SO
MAY CAUSE PROPERTY DAMAGE, PERSONAL
INJURY OR DEATH.
WARNING
To prevent the risk of property damage, personal injury or
death, do not store combustible materials or use gasoline
or other flammable liquids or vapors in the vicinity of this
appliance.
REPLACEMENT PARTS

       
     

       






855-DAIKIN-1
GENERAL INFORMATION


WARNING
To prevent property damage, personal injury or death due to
fire, explosions, smoke, soot, condensation, electric shock
or carbon monoxide, this unit must be properly installed,
repaired, operated and maintained.
-


    






          



 ............................12
Maintenance .......................................................................14
.................................17
Appendix B Electrical Data...................................................29
Appendix C Unit Dimensions ...............................................34
Appendix D Wiring Diagrams...............................................25
.................................................................47

3



    
    
    












-






        




        
-





-


         


 

 
 

 
 
 
 

         
        
       
 


NOTE:   -








UNIT LOCATION
WARNING
To prevent possible equipment damage, property damage,
personal injury or death, the following must be observed
when installing the unit.
IMPORTANT NOTE: 
See important note under Roof Curb Installaon Only.

Unit should be energized 24 hours prior to
compressor start up to ensure crankcase heater has suciently
warmed the compressors. Compressor damage may occur if
this step is not followed.
NOTE:
       
-



 

 

 

       


           
         
     
   
  
     
        

4
     
       

• 
       

        
      
  



•        
      


•         





• 


• 

          

• 


• 




• 

•  

• 



•         



•        
     





 
 


          

 

 



B

   MUST BE REMOVED

Please follow the instrucons below to remove brace.
CAUTION
When unit is suspended, boards and shipping brace will
drop when screws are removed. To prevent personal injury,
STAND CLEAR. Remove fork hole brackets, boards and
shipping brace from bottom of unit before placing units
onto curb.

The struts are located in the fork holes and
are used to protect the unit from damage while liing with
forks. The shipping brace is located under the unit (under
compressor).

         


5
LIFT OVER APPROXIMAT E
CENTER OF UNIT
SPREADER BARS
MUST BE USE D W ITH
LIFTING STRAPS THAT
ARE LESS THAN 16
FEET L ONG
REMOVE 2 BRACKETS
ON EACH END TO
REMOVE
WOODEN STRUTS
REMOVE 2 BRACKETS
ON EACH END TO
REMOVE
SHIPPING BRACE





         






      
-


WARNING
To prevent possible equipment damage, property
damage, personal injury or death, the following
bullet points must be observed when installing
the unit.
• 

• 

       



• 


         

NOTE:


CAUTION
All curbs look similar. To avoid incorrect curb position-
ing, check job plans carefully and verify markings on curb
assembly. Instructions may vary in curb styles and supercede
information shown.
-

CLEARANCES
*In situaons that have mulple units, a 48” minimum clearance is
required between the condenser coils.
UNIT CLEARANCES
         

-



         



6
ROOF CURB INSTALLATION









CAUTION
If protrusions exist, do not attempt to set unit on curb.
Information shown.
ROOF TOP DUCT CONNECTIONS


NOTE:

RIGGING DETAILS
WARNING
To prevent property damage, the unit should remain in an
upright position during all rigging and moving operations.
To facilitate lifting and moving when a crane is used, place
the unit in an adequate cable sling.
CAUTION
Do not lift units two at a time. Provisions for forks have
been included in the unit base fram. Minimum fork length is
72” to prevent damage to the unit.


WARNING
To prevent possible equipment damage, property damage,
personal injury or death, the following bullet points must
be observed when installing the unit.
 

 
 

          






        


Important:        


         
-




DFG

7
CAUTION
When unit is suspended, boards and shipping brace will
drop when screws are removed. To prevent personal injury,
STAND CLEAR. Remove fork hole brackets, boards and
shipping brace from bottom of unit before placing units
onto curb.
        

COMPRESSOR 1
COMPRESSOR 2
CG
EVAPORATORCOILS
A
B
C
XD
Y
CORNER & CENTER OF GRAVITY LOCATIONS
DATA 
15T 20T 25T
   
 410  499
 395  
 433  
   
  1993 
   
   
NOTE:
CAUTION
To prevent severe damage to the bottom of the unit, do not
fork lift unit after wood struts have been removed.


      




CAUTION
To prevent damage to the unit, do not allow crane hooks and
spreader bars to rest on the roof of the unit.

ELECTRICAL WIRING
WARNING
HIGH VOLTAGE
DISCONNECT ALL POWER BEFORE SERVICING
OR INSTALLING THIS UNIT. MULTIPLE POWER
SOURCES MAY BE PRESENT. FAILURE TO DO SO
MAY CAUSE PROPERTY DAMAGE, PERSONAL
INJURY OR DEATH.
WARNING
HIGH VOLTAGE
TO AVOID PROPERTY DAMAGE, PERSONAL
INJURY OR DEATH DUE TO ELECTRICAL SHOCK,
DO NOT TAMPER WITH FACTORY WIRING. THE
INTERNAL POWER AND CONTROL WIRING OF
THESE UNITS ARE FACTORY-INSTALLED AND HAVE
BEEN THROUGHLY TESTED PRIOR TO SHIPMENT.
CONTACT YOUR LOCAL REPRESENTATIVE IF
ASSISTANCE IS REQUIRED.
CAUTION
To prevent damage to the wiring, protect wiring from sharp
edges. Follow national electrical code and all local codes
and ordinances. Do not route wires through removable
access panels.
CAUTION
Conduit and fittings must be weather-tight to prevent water
entry into the building.
-







-




NOTE:           -

-






8
CAUTION
To avoid property damage or personal injury due to fire, use
only copper conductors.
CAUTION
To prevent improper and dangerous operation due to wiring
errors, label all wires prior to disconnection when servic-
ing controls. Verify proper operation after servicing.
NOTE:




 


 






 

15-25 TON TSTAT POWER AND LOW VOLTAGE
TERMINAL LOCATIONS

         

WARNING
Failure of unit due to operation on improper line voltage or
with excessive phase unbalance constitues product abuse and
is not covered by the warranty. It may cause severe damage to
the unit electrical components.

   


NOTE:




-






-



9
ELECTRICAL ENTRANCE LOCATIONS




         

         
          


        
        
         
        

          





    


       


NOTE: 
        



NOTE:
CIRCULATING AIR AND FILTERS

           
       
       



        




CONDENSATE DRAIN CONNECTION






NOTE: 

 

Base Rail
 
DRAIN CONNECTION
-






          






10


STARTUP, ADJUSTMENTS, AND CHECKS
WARNING
HIGH VOLTAGE
To avoid personal injury or death due to
electrical shock, bond the frame of this unit
to the building electrical ground by use of
the grounding terminal provided or other ac-
ceptable means. Disconnect all power before
servicing or installing this unit.
CAUTION
To prevent property damage or personal injury, Do not start
the unit until all necessary pre-checks and test have been
performed.
WARNING
MOVING MACHINERY HAZARD!
To prevent possible personal injury or death, disconnect
power to the unit and padlock in the “OFF” position before
servicing fans.













       
 
     






the





 

        

          




 

    


          











-


           

-



System Voltage - 

Nameplate Voltage -   -



-
-

        



11

3) PERCENT VOLTAGE
UNBALANCE
2) MAXIMUM VOLTAGE DEVIATIONS
FROM AVERAGE VOLTAGE
1) AVERAGE VOLTAGE
HOW TO USE THE FORMULA:
EXAMPLE: With voltage of 220, 216, and 213
1) Average Voltage = 220+216+213=649 / 3 = 216
2) Maximum Voltage Deviations from Average Voltage = 220 - 216 = 4
3) Percent Voltage Unbalance = 100 x = = 1.8%
Percent voltage unbalance MUST NOT exceed 2%
.
4
216
400
216
= 100 X
AIR FLOW ADJUSTMENTS








NOTE:-
 

            

         

 

 


 



















Note:




-


12
DRC Model Wiring
GR (FAN)
Energized during Heat Mode
BR (Heating Stage 2)
PU (Cooling Stage 2)
WH (Heating Stage 1)
YL (Cooling Stage 1)
** TB1-DH is energized when the unit is in heat
mode. When TB1-DH is energized, the blower motor
operates at a new group of programmed speeds,
T6-T10, in place of T1-T5.
• Move YELLOW (YL) wire from TB1-T1 to T2 to change blower speed during cooling stage 1 operation.
(Do not move wires YL and PU to the same taps)
• Move WHITE (WH) wire from TB1-T6 to T7 to change blower speed during heating stage 1 operation.
(Do not move wires WH and BR to the same taps)
• Move PURPLE (PU) wire from TB1-T3 to T4 or T5 to change blower speed during cooling stage 2 operation.
(Do not move wires YL and PU to the same taps)
• Move BROWN (BR) wire from TB1-T8 to T9 or T10 to change blower speed during heating stage 2 operation.
(Do not move wires WH and BR to the same taps)
AC G Y1 Y2 W1 W2 DH T1 T2 T3 T4 T5 T6 T7 T8 T9 T10
Fan Only X GR
Cooling Mode LO X X
Cooling Mode HI X X X
Hea�ng Mode Lo X X
Hea�ng Mode HI X X X
X= 24V Signal
DFC/DFG OPERATION and WIRE RANGE CHART
DFC/DFG OPERATION
WIRE RANGE
= Range of AVAILABLE TAPS
For wire color informa�on and placement, view DFC/DFG Model Wiring

13






-








       

          



          


SUPERHEAT AND SUBCOOLING

          


 





SUBCOOLING FORMULA = SATURATED LIQUID LINE TEMPERA-
TURE - LIQUID LINE TEMPERATURE








SUPERHEAT = SUCTION LINE TEMP - SAT. SUCTION TEMP.

NOTE:      

   -







-




NOTE: 














         


 


        




NOTE: 


        

 

   

 

NOTE: 

 

14
Design Superheat & Subcooling
Model Circuit Superheat
± 20F
Subcooling
± 10F
Expan-
sion
Device
Outdoor
Ambent
(°F)
DFG180 1 8 14 TXV 95
DFG180 2 8 12 TXV 95
DFG240 1 8 9 TXV 95
DFG240 2 8 6 TXV 95
DFG300 1 10 7 TXV 95
DFG300 2 10 7 TXV 95


-




 

          


 UNIT WITH ECONOMIZER OPTION:

       
       
       

 

 

 
 

WARNING
BURN HAZARD!
DO NOT TOUCH! DISCHARGE LINE MAY BE HOT!
        
        



       



        
       



         

 




         




MAINTENANCE
WARNING
HIGH VOLTAGE
DISCONNECT ALL POWER BEFORE SERVICING
OR INSTALLING THIS UNIT. MULTIPLE POWER
SOURCES MAY BE PRESENT. FAILURE TO DO SO
MAY CAUSE PROPERTY DAMAGE, PERSONAL
INJURY OR DEATH.
WARNING
To prevent personal injury or death due to improper
installation, adjustment, alteration, service or maintenance,
refer to this manual. For additional assistance or
information, consult a qualified installer, service agency or
the gas supplier.
CAUTION
This unit must be ISOLATED from the gas supply piping system
by closing its individual manual shutoff valve during any
pressure testing equal to or less than 1/2 psig.
        
-


 
        
        
          

 
 
 
 
 
 
 

 



15

CAUTION
TO PREVENT PROPERTY DAMAGE DUE TO FIRE AND LOSS OF
EQUIPMENT EFFICIENCY OR EQUIPMENT DAMAGE DUE TO
DUST AND LINT BUILD UP ON INTERNAL PARTS, NEVER
OPERATE UNIT WITHOUT AN AIR FILTER INSTALLED IN THE
RETURN AIR SYSTEM

           

   

-









-




NOTE:






CAUTION
Prior to servicing MCHE, be sure to disconnect the power
supply and use lock-out methods to prevent the power from
accidentally being turned on.

















STEP 2: Rinse

 

 
 










 

Figure 1



 

 


 


16
Figure 2
Figure 3





      



         




WARNING
Field applied coatings are not recommended for brazed
aluminum MicroChannel heat exchangers. MicroChannel heat
exchangers must NOT be coated using any other coating,
Coating of a coil using a supplier or coating process is not
approved and voids the product warranty. It may also reduce
the lifetime and/or the performance of the MicroChannel
heat exchanger.







17


NOTES:
 
 
      
  422 434  
  503   
 2055    
     
1-----
 -----
   509  
 3945    
     
     
1    
     
 5124 544   
     
 4222    
     
1    
     
     
     
     
     
1    
   911  
     
     
     
 4105    
1    
 5955  922  
     
     
     
     
1-----
 -----
     
     
     
     
1    
 -----
     
     
     
     
1    
   923  
     
     
     
     
1    
  942   
     
     
     
     
1    
   932  



T9
T5
T10
DFC1803D Standard Static
T1
T2
T3
T4
      
  504 521  
 4019    
     
 2911    
12424    
     
  591   
 5453    
     
     
14141    
     
     
     
     
     
1    
  910   
 9133    
     
     
  912 929  
1    
   992  
     
 9030    
   912  
  924   
1 953   
  990   
     
     
     
     
1-----
 -----
     
     
     
     
1 925 911  
 -----
     
     
     
     
1 935 930  
     
 9133    
     
     
  912 929  
1    
   992  
     
 9030    
   912  
  924   
1 953   
  990   



T9
T5
T10
DFC2403D Standard Static
T1
T2
T3
T4

18


NOTES:
 
 
      
   594  
     
 5095    
     
1    
     
     
     
     
     
1    
  902 921  
     
     
     
  923   
1 954 951  
   1000  
  1051   
     
 10323    
  1132   
110002 1152   
   1132  
   1013  
  1112   
 10521 1140   
 10359    
1  1120  
 10000 1211 1152  
     
     
 -----
 -----
1-----
 -----
     
  913   
  949   
     
1  991  
 -----
 9934    
  1110 999  
 9559    
     
19201    
  1212 1120  
  1123   
 10203 1149 1034  
 10034    
  1199   
1 1222   
  1245   
   1013  
  1112   
 10521 1140   
 10359    
1  1120  
 10000 1211 1152  



T9
T5
T10
DFC3003D Standard Static
T1
T2
T3
T4

19


NOTES:
 
 
             
        925   
        953   
         913  
 5392        944  
1     1 1033   
 4503        1010  
 3515  911     1090   
        1122   
   1020     1154   
2     2    
 1305 1109 1103    5401 1215   
       9129    
           
           
 5392       912 910  
1     1  942  
 4503          
 3515  911     1022 1015  
         1053  
   1020     1109 1090  
2     2 1150   
 1305 1109 1103        
           
           
           
        923 920  
1     1  952  
   923     990   
  991       1022  
 5502 1033 1020      1059  
 5050  1059     1114   
2 1122 1101   2 1155 1134  
   1141     1201   
       9405    
       9091    
           
        930   
1 924 921   1    
         994  
  1009      1033   
  1051 1039        
         1100  
2 1139    2 1159   
        1205   
       9495    
           
        901   
  923 920      934  
1  952   1    
  990      1003 999  
   1022      1033  
   1059        
  1114      1121 1104  
2 1155 1134   2  1141  
  1201         



T9
T10
T4
T5
T3
T1
T2


20


NOTES:
 
 
             
       9125    
           
           
        935 901  
1     1    
 4519  900        
 4139       1029   
         1109  
  1034 1012    - - - - -
2  1043   2 - - - - -
       - - - - -
       9412    
       9124    
        925   
         920  
1     1    
   911     1020 1024  
  934      1050   
  992      1090 1124  
  1039 1029     1129 1155  
23510     2    
 3192  1099    - - - - -
           
       9412 919   
  930     9153 954   
   925      942  
1 992    1 1013 995  
  1025      1045 1042  
  1054       1095  
  1094      1111 1140  
  1133         
2     2  1201  
  1209      1223 1229  
  909      909   
  941      941   
 9353  915    9353  915  
   959      959  
19025 1032 1009   19025 1032 1009  
   1055      1055  
  1090      1090   
   1151      1151  
           
2 1199 1211   2 1199 1211  
   1239      1239  
   902      902  
  993 935     993 935  
  1025      1025   
  1055      1055   
1  1042   1  1042  
 9235      9235    
  1132 1133     1132 1133  
           
   1204      1204  
2 1232 1233   2 1232 1233  
   1259      1259  


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T9
T10
T4
T5
T3
T1
T2
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