York DM090 - CHARGING THE UNIT

127408-YIM-B-0606
48 Unitary Products Group
CHARGING THE UNIT
These units should be charged using the superheat method.
Super heat charging data is shown in Tables 50 thru 51.
When charging each system, superheat data should be taken
at the compressor inlet.
FIGURE 29 - TYPICAL GAS VALVE
I N L E T
P R E S S U R E
T A P
H I G H & L O W G A S A D J U S T M E N T
O U T L E T
P R E S S U R E
T A P
M A T E - N - L O C K
C O N N E C T O R S
H I
L O
O N
O F F
M V
C
H I
TABLE 50: 7.5 TON SUPERHEAT CHARGING
Outdoor
Temp (°F)
Superheat at Compressor Suction (°F)
Airflow = 3000 CFM
Indoor WB Temp (°F)
55 57 59 61 63 65 67 69 71 73 75
65 7.8 10.9 14.0 17.1 20.1 23.2 26.3 27.1 28.0 28.8 29.7
70 6.5 9.4 12.3 15.2 18.1 21.0 23.9 25.0 26.2 27.3 28.5
75 5.1 7.9 10.6 13.3 16.0 18.7 21.4 22.9 24.4 25.8 27.3
80 - 6.3 8.8 11.4 13.9 16.4 19.0 20.8 22.6 24.4 26.2
85 - - 7.1 9.5 11.8 14.2 16.5 18.6 20.7 22.9 25.0
90 - - - 6.7 8.8 10.9 13.1 15.9 18.7 21.6 24.4
95 - - - - 5.8 7.7 9.6 13.2 16.7 20.3 23.8
100 - - - - - 5.8 7.2 11.0 14.8 18.5 22.3
105 -------8.8 12.8 16.8 20.8
110 -------6.6 10.8 15.1 19.3
115 --------8.9 13.3 17.8