Lennox KCC Series

Page 33
B-Refrigerant Charge and Check - Fin/Tube Coil
       
any condition.

    

nameplate charge.
NOTE - System charging is not recommended below 60°F
(15°C). In temperatures below 60°F (15°C) , the charge
must be weighed into the system.
         

IMPORTANT - Charge unit in standard cooling mode.
 
ing mode with economizer disabled until system

outdoor air dampers are closed.
 Check each system separately with all stages
operating.
 Use a thermometer to accurately measure the out
door ambient temperature.
 Apply the outdoor temperature to TABLE 10 to
TABLE 13 to determine normal operating pressures.


 Compare the normal operating pressures to the


󰀨󰀨
could mean that the system is not properly charged

the system. Correct any system problems before
proceeding.
 


• Add or remove charge in increments.
• 
ant is added or removed.
 

TABLE 10 581129-01
KGC/KCC092S Fin/Tube - W & W/O Reheat
Outdoor
Coil
Entering
Air Temp
CIRCUIT 1 CIRCUIT 2
Discharge
+ 10 psig
Suction
+ 5 psig
Discharge
+ 10 psig
Suction
+ 5 psig
 270 128  140
 310 131  146
  133 338 
 401 136 388 
  140 433 160
   488 162
TABLE 11 581130-01
KGC/KCC102S Fin/Tube - W & W/O Reheat
Outdoor
Coil
Entering
Air Temp
CIRCUIT 1 CIRCUIT 2
Discharge
+ 10 psig
Suction
+ 5 psig
Discharge
+ 10 psig
Suction
+ 5 psig
  128 276 138
 308 132 314 142
    146
   407 
 447 141  
  146  
TABLE 12 581131-01
KGC/KCC120S Fin/Tube - W & W/O Reheat
Outdoor
Coil
Entering
Air Temp
CIRCUIT 1 CIRCUIT 2
Discharge
+ 10 psig
Suction +
5 psig
Discharge
+ 10 psig
Suction +
5 psig
 263  262 132
 301  304 140
 341 123 348 146
 386   
 440 130 447 
    
TABLE 13 581132-01
KGC/KCC150S Fin/Tube - W & W/O Reheat
Outdoor
Coil
Entering
Air Temp
CIRCUIT 1 CIRCUIT 2
Discharge
+ 10 psig
Suction +
5 psig
Discharge
+ 10 psig
Suction +
5 psig
 281 121 283 137
 320   141
 364  370 143
 407 132  
   464 148
    

(Fin/Tube Coil Continued)
 
perature to outdoor ambient temperature.
     

 Approach temperature should match values in
TABLE 14. An approach temperature greater than
value shown indicates an undercharge. An approach
temperature less than value shown indicates an
overcharge.
 
or undercharged systems. Use TABLE 10 to TABLE
