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SYSTEM CHECK
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90-1854
START-UP
1. Press the ON/OFF button to turn the dehumidifier control ON . The
display will show the current dew point or %RH setting, and the
dehumidifier blower will turn on to start sampling the air .
"AIR SAMPLING" will show on the display .
2. Use the UP or DOWN button to adjust the dew point setting or
%RH setting as desired . The recommended initial setting is 3
using dew point control or 59%RH, for preservation and preventing
condensation on floor joists . See Table 1 .
3. After three (3) minutes of sampling, the measured dew point or
%RH will be compared to the setting:
a. If the dew point is above the setting or above the %RH setting,
the dehumidifier compressor turns on and "AIR SAMPLING" will
be replaced by "DEHUMIDIFYING" . The compressor remains
on until the measured dew point falls below the setting or
measured %RH falls 3% below the setting .
b. If the dew point or %RH is below the setting, the blowers turn
off and the display returns to showing the setting .
4. The dehumidifier will sample again every 60 minutes, or at any
time if the humidity setting is lowered .
NOTE: For Start-Up when using a Model 76 Control, reference the
Model 76 Installation Instructions .
Your dehumidifier is equipped with two features that protect against unwanted energy consumption . Defrost is a normal operating mode that
helps to prevent significant ice formation on the refrigeration system coil . The dehumidifier display will show "DEFROSTING" when operating
in this mode . This mode can occur when there is not enough air moving through the dehumidifier or if the temperature and/or humidity of
the incoming air is too low . The second protection feature is the E8 code . E8 on the dehumidifier display indicates that the air entering the
dehumidifier is below 50°F or above 104°F, or the dew point of the incoming air is below 40°F . There would be a significant reduction in
dehumidifier efficiency if the dehumidifier operated outside of these conditions . Low dew point conditions can be seen in some basements
or crawl spaces and usually occur in the Winter and Spring months . The dehumidifier continues to monitor the incoming air and when the
conditions are within the operating range, E8 will be removed from the display and dehumidification will begin as needed .
Press and hold the ON/OFF button
and MODE buttons for 3 seconds .
The measured humidity, AIR
SAMPLING and TEST will show
on the display . The ALERT LIGHT
will turn on and stay on until the
system check is "DONE" .
After three (3) minutes the
dehumidifier compressor will
turn on and DEHUMIDIFYING will
replace AIR SAMPLING on the
control screen .
90-1854
90-1854
TABLE 1 – %RH (+/- 5%) Based on Dryness Setting and
Crawl Space Temperature
Dryness Setting
& Dew Point
1 – Less, 65°F DP
2 – 61°F DP
3 – Normal, 57°F DP
4 – Normal, 53°F DP
5 – Normal, 49°F DP
6 – 46°F DP
7 – Most Dry, 42°F DP
EXAMPLE: At a crawl space temperature of 70°F and a dryness level
setting of 3 (57°F DP), the dehumidifier will work to achieve a 63%
relative humidity level .
• The %RH values are +/- 5% and are to be used as a GUIDE ONLY .
• The crawl space temperature is measured at the dehumidifier inlet .
After one minute of compressor
operation, all outputs will turn off
and DONE will blink for 3 seconds
and then return to the OFF screen .
Crawl Space Temperature
60°F
65°F
70°F
84%
87%
73%
90%
75%
63%
78%
65%
55%
67%
56%
47%
60%
50%
42%
51%
43%
36%
9
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