Table 17: DEX048 Superheat Charging
Outdoor |
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| Superheat at Compressor Suction (°F), Airflow = 1600 CFM |
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Temp |
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|
|
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| Indoor Wet Bulb Temp (°F) |
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|
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(°F) | 55 | 57 | 59 |
| 61 | 63 | 65 | 67 | 69 |
| 71 | 73 | 75 |
65 | 10.1 | 10.0 | 9.9 |
| 9.8 | 9.8 | 9.7 | 9.6 | 9.6 |
| 9.7 | 9.7 | 9.7 |
70 | 9.9 | 9.8 | 9.7 |
| 9.7 | 9.6 | 9.5 | 9.5 | 9.5 |
| 9.6 | 9.6 | 9.6 |
75 | 9.7 | 9.6 | 9.5 |
| 9.5 | 9.4 | 9.4 | 9.3 | 9.4 |
| 9.5 | 9.5 | 9.5 |
80 | 9.5 | 9.4 | 9.4 |
| 9.3 | 9.3 | 9.2 | 9.2 | 9.3 |
| 9.4 | 9.4 | 9.5 |
85 | 9.2 | 9.2 | 9.2 |
| 9.1 | 9.1 | 9.0 | 9.0 | 9.1 |
| 9.2 | 9.3 | 9.4 |
90 | 8.8 | 8.9 | 8.9 |
| 8.9 | 9.0 | 9.0 | 9.1 | 9.2 |
| 9.4 | 9.5 | 9.5 |
95 | 8.4 | 8.5 | 8.6 |
| 8.7 | 8.9 | 9.0 | 9.1 | 9.3 |
| 9.5 | 9.6 | 9.7 |
100 | 8.3 | 8.4 | 8.5 |
| 8.6 | 8.7 | 8.8 | 9.0 | 9.2 |
| 9.5 | 9.7 | 9.8 |
105 | 8.3 | 8.4 | 8.4 |
| 8.5 | 8.6 | 8.7 | 8.8 | 9.2 |
| 9.5 | 9.7 | 9.9 |
110 | 8.2 | 8.3 | 8.4 |
| 8.4 | 8.5 | 8.6 | 8.7 | 9.1 |
| 9.5 | 9.8 | 10.0 |
115 | 8.1 | 8.2 | 8.3 |
| 8.3 | 8.4 | 8.4 | 8.5 | 9.0 |
| 9.5 | 9.8 | 10.1 |
Table 18: DEY060 Superheat Charging
Outdoor |
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| Superheat at Compressor Suction (°F), Airflow = 1750 CFM |
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Temp |
|
|
|
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| Indoor Wet Bulb Temp (°F) |
|
|
|
|
| ||
(°F) | 55 | 57 | 59 |
| 61 | 63 | 65 | 67 | 69 |
| 71 | 73 | 75 |
65 | 16.6 | 16.7 | 16.8 |
| 16.9 | 17.1 | 17.2 | 17.3 | 17.9 |
| 18.4 | 18.7 | 19.0 |
70 | 16.2 | 16.4 | 16.5 |
| 16.6 | 16.7 | 16.8 | 17.0 | 17.4 |
| 17.9 | 18.1 | 18.4 |
75 | 15.9 | 16.0 | 16.1 |
| 16.2 | 16.4 | 16.5 | 16.6 | 17.0 |
| 17.4 | 17.6 | 17.7 |
80 | 15.5 | 15.7 | 15.8 |
| 15.9 | 16.0 | 16.1 | 16.3 | 16.5 |
| 16.8 | 17.0 | 17.1 |
85 | 15.2 | 15.3 | 15.4 |
| 15.5 | 15.7 | 15.8 | 15.9 | 16.1 |
| 16.3 | 16.4 | 16.5 |
90 | 14.0 | 14.2 | 14.3 |
| 14.4 | 14.5 | 14.6 | 14.8 | 15.3 |
| 15.9 | 16.2 | 16.5 |
95 | 12.9 | 13.0 | 13.1 |
| 13.2 | 13.4 | 13.5 | 13.6 | 14.6 |
| 15.5 | 16.0 | 16.5 |
100 | 12.6 | 12.8 | 12.9 |
| 13.0 | 13.1 | 13.2 | 13.3 | 14.3 |
| 15.2 | 15.7 | 16.2 |
105 | 12.4 | 12.5 | 12.6 |
| 12.7 | 12.8 | 12.9 | 13.0 | 14.0 |
| 14.9 | 15.4 | 15.9 |
110 | 12.2 | 12.3 | 12.3 |
| 12.4 | 12.5 | 12.6 | 12.7 | 13.7 |
| 14.6 | 15.1 | 15.6 |
115 | 11.9 | 12.0 | 12.1 |
| 12.2 | 12.2 | 12.3 | 12.4 | 13.4 |
| 14.3 | 14.8 | 15.3 |
Blower Speed Selection
The variable speed blowers are designed to deliver constant CFM regardless of the external static pressure (ESP) in the ductwork. Therefore, if too many supply registers are closed, a filter becomes clogged, or there is a restriction in the ductwork, the motor will automatically operate at a higher speed to compensate for the higher ESP. This may result in a higher operating sound level.
These units have variable speed motors that automatically adjust to provide constant CFM from 0.2" to 0.6" w.c. static pressure. From 0.6" to 1.0" static pressure, CFM is reduced by 2% per 0.1" increase in static. Operation on duct systems with greater than 1.0" w.c. external static pressure is not recommended.
To Set Cooling CFM:
Refer to Tables 7 and 8 for the possible cooling and heating CFM selections.
Find the recommended system airflow for the unit model.
Set desired cooling airflow by moving the jumper on the “Cool” tap located on the CFM selection board as indicated in Tables 7, 8 and Figure 10.
Airflow may be increased by 10% by moving the “ADJ” jumper to “B”. Airflow may be decreased by 10% by moving the “ADJ” jumper to “C”.
NOTE: CFM indicator light flashes once for every 100 CFM (i.e., 12 flashes = 1200 CFM).
To Set Delay Profile:
Every unit has multiple cooling “blower off delay” profiles to optimize system performance and efficiency. Refer to Table 19 for the regional climate in your area. Place the “DELAY” jumper tap on the CFM selection board to the appropriate pin setting.
To Set Electric Heat CFM:
The airflow required for Electric Heat may be different than for cooling.
Refer to Table 10 for the minimum required CFM for the electric heater installed. Find the desired airflow in Tables 7 and 8. Set the “Heat” Jumper on the CFM selection board to tap shown.
Unitary Products Group | 17 |
