FOR HVAC INSTALLER ONLY
4.1A Filter Options
An optional filter frame is available that attaches to the back of the machine and adds 6-1/2” to the units’ depth. It allows the choice of using either 95% efficient, HEPA grade, or activated carbon filters in addition to the standard filter. These filters are accessible by removing the 4 screws from the filter frame top cover.
The 95% efficient filters MERV 14 (as rated by ASHRAE 52-76 Dust Spot Test) capture about 95% of all particles greater than
1 micron. Actual filter size is 19.38” wide x 15.38” high x 3.75” deep. Two filters are stacked to form a 32” high filter bank. These filters can be tested for replacement using the optional filter test listed in Section 4.1B.
The HEPA media filter captures 99.97% of all particles 0.3 microns or larger that pass through it. Actual filter size is 19.38” wide x 30.75” high x 3.75” deep. These filters can be tested for replacement using the optional filter test listed in Section 4.1B.
Optional Carbon filter/Pleated filter combination: The carbon filter is actually a blend of activated carbon and potassium permanganate. This blend removes the vast majority of gaseous contaminants encountered in most filtering applications. The activated carbon removes the heavier volatile organics while the potassium permanganate removes the lower molecular weight contaminates. The life of this disposable filter depends upon both the hours used and the contamination level. The filter contains 8.7 pounds of active media (17.4 pounds with two filters).
Another advantage of this blend versus an all carbon filter is that this one changes color as it loads up with contaminates. It starts out black, then turns pink, then brown and finally white. It is best changed when it passes the brown stage and begins to turn white. It has lost most of its effectiveness at that point. Actual filter size of the carbon filter is 19.38” wide x 15.38” high x 2.88” deep. The .88” deep pleated filter is the same nominal size and is installed downstream of the carbon dust. The two filter combos are stacked to form a 32” high filter bank.
4.1B Optional Filter Test
The optional 95% efficiency and HEPA filters have long lives when prefiltered by the standard MERV 11 65% efficient pleated inlet filter; they can last many years in certain conditions. How long they last can, however, vary widely depending upon the following: unit run time, air contamination level and standard inlet filter cleanliness. Given the expense of the optional filter, it can be costly to change them prematurely. The following test helps determine when they should be changed.
Air exiting the bottom rear of the unit enters the filter frame, then passes through the optional filter and into the room. If the filter is dirty, air pressure builds up before the filter. To check this pressure, remove the plastic plug from the filter frame top; you will feel air coming out of the hole with the unit running. Place the ping pong ball that came with the filter frame on the hole and let go (any marked, regulation sized ping pong ball will work). If the ball does not move or only bounces slightly and does not spin
continuously, the filter is clean enough for continued use. If the ball floats above the hole and starts to spin and perhaps wobble within 30 seconds, the filter needs to be changed.
5. Service
Caution: Servicing the Santa Fe with its high pressure refrigerant system and high voltage circuitry presents a health hazard which could result in death, serious bodily injury, and/or property damage. Only qualified service people should service this unit.
5.1 Warranty
A warranty certificate has been enclosed with this unit. Read it before any repair is initiated. If a warranty repair is required, call the factory first at 1-800-533-7533 for warranty claim authorization and technical assistance.
5.2 Technical Description
The Santa Fe RX uses a refrigeration system similar to an air conditioner’s to remove heat and moisture from incoming air, and add heat to the air that is discharged (see figure 1).
Hot, high pressure refrigerant gas is routed from the compressor to the condenser coil. The refrigerant is cooled and condensed by giving up its heat to the air that is about to be discharged from the unit. The refrigerant liquid then passes through a filter/drier and capillary tubing which cause the refrigerant pressure and temperature to drop. It next enters the evaporator coil where it absorbs heat from the incoming air and evaporates.
The evaporator operates in a flooded condition, which means that all the evaporator tubes contain liquid refrigerant during normal operation. A flooded evaporator should maintain constant pressure and temperature across the entire coil, from inlet to outlet.
The mixture of gas and liquid refrigerant enter the accumulator after leaving the evaporator coil. The accumulator prevents any liquid refrigerant from reaching the compressor. The compressor evacuates the cool refrigerant gas from the accumulator and compresses it to a high pressure and temperature gas to repeat the process.
5.3 Troubleshooting
No dehumidification. Neither blower nor compressor run with AUTO FAN and humidity control turned ON.
1.Unit unplugged or no power to outlet.
2.Humidity control set too high or defective (Sec. 3.1 & 5.7).
3.Loose connection in internal wiring (Fig. 2).
4.Safety float switch in remote reservoir has turned unit off (Sec. 2.5).
No dehumidification. Compressor does not run but blower runs with AUTO FAN and humidity control turned to ON.
1.Defective compressor run capacitor (Sec. 5.6).
2.Loose connection in compressor circuit (see Fig. 2).
