To increase the superheat (measured at the condenser base valve), turn the stem clockwise (in). Similarly, to decrease the superheat, turn the stem counterclockwise (out). Use a ¼ “ refrigeration wrench for this function.
Note: Design point for the system is 10 degrees of superheat (measured at the condenser base valve) at 95 degree outdoor air.
Charging Note: Air handlers with TXV’s (ARPT’s and AEPT’s) should be charged to 15 degrees of subcooling at the indoor inlet. This supercedes any subcooling value listed with condensing unit’s literature.
AEPT MOTOR ORIENTATION
If the unit is in the upflow position, there is no need to rotate the motor. If the unit is in the downflow or horizontal position, loosen motor mount and rotate motor as shown in Figure
4.Be sure motor is oriented with the female connections on the casing pointing down. If the motor is not oriented with the connections pointing down, water will collect in the motor and cause premature failure.
FRONT VIEW | SIDE VIEW |
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FOR OPTIONAL
SAFETY GND USE
MOUNTING BOLTS
FEMALE CONNECTIONS
Figure 4
AEPT Motor Orientation
CONVERSION TO DOWNFLOW
The ARPF “B” series product is factory equipped for downflow operation and no field conversion is required. It is recommeneded that the conversion to downflow be performed before placing the air handler in its final location and in an area that allows for access to all sides. To prevent the evaporator coil pan from “sweating” the DPI accessory insulation kit is to be used when performing this conversion. Note: The DPI kit is not supplied with this product and is to be purchased separately. See Table 8 for the correct DPI kit.
ARUFor ARPT | AEPT model | Insulation Kit |
model |
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n/a | ||
30 | ||
036, 060 |
Table 8
Refer to Figures 5 through 7 for the location of the components referenced in the following steps. Figure 5 illustrates the new installation location for the removed components.
1.Before inverting the air handler, remove all access panels, the coil rear channel bracket, and the filter
2.Remove the evaporator coil and the horizontal drain pan. Discard horizontal drain pan.
3.Install the provided plastic plug into the vacated access panel.
4.Remove the two (2) zee coil support brackets and insulation retaining brackets.
5.Remove the tie bracket.
6.Install the DPI Insulation Kit onto the bottom of the drain pan.
| Return Air Side |
| of Unit |
Access |
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Panel | Rear |
| Channel |
| Bracket |
| Zee Coil |
| Support Bracket |
| Coil Retaining |
| Bracket |
| Tie Bracket |
NOTE: The filter provision is not applicable
in THIS downflow application.
Figure 5
7.Install the zee coil supports and the wrapper stiffeners.
8.Install the tie bracket.
9.Install the rear channel bracket.
10.To prevent possible condensate “blow off” the insulation retainers are to be laid into the evaporator coil pan as shown in Figure 6.
3" Flat Insula tio n Retaine r (Both Sides)
Figure 6
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