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4
2. CONTROLS (CONT'D)
3. MAINTENANCE
2.2 HOW TO USE THE CONTROLS (CONT'D)
a) Using the humidity level selector (cont'd):
Spring and fall:
– Position the selector anywhere between 75% and 50% (higher on warm days, lower on cold days).
– If certain periods during the spring and fall seem more like winter then you should follow the instructions given for humidity
control during winter!
Summer:
– Position the selector at 80% during the day.
– If you want to introduce cool fresh air into the house during certain summer nights, then lower the selector to 20% for these nights.
b) Explanations about humidity levels: IMPORTANT
The comfort level for human beings is between 30% and 45% relative humidity. To measure the present humidity level in your
house, you can proceed as follows:
– Turn the dial to 80%.
– Turn the dial slowly downwards until you hear a “click”. The dial will then be pointing to the value for the present humidity level
(precision of 5%).
Turning the selector lower than the “click” position means that you desire to lower the humidity level in the house. This action will
initiate the “air exchange” mode on your ventilation system and means that you are expecting the stale humid air from inside to be
replaced with dryer air from outdoors. It is therefore pointless to try and lower the humidity with “air exchange” on rainy or foggy
days.
Turning the selector higher than the “click” position means that you are not interested in having your ventilation system function
under “air exchange” mode.
Finally keep in mind that the instructions given above are just guidelines. You might prefer different values for the humidity selector,
depending on the insulation of your house, the type of windows, or to satisfy the specific needs of certain occupants. After some
experimenting, you will eventually develop a control method best adapted to your household needs.
C) Using the circulation selector (Model 11417, for PRO 200 units only)
“Continuous Circulation”: At the exact moment when the desired humidity level is reached, the “air exchange” mode is interrupted
and the system continues to operate under “circulation” mode only (see section 1). The “air exchange” mode will be reactivated
only if the humidity level in the house goes up higher than the selected value.
“Intermittent Circulation”: At the exact moment when the desired humidity level is reached, the unit goes off. It will automatically
start up again in “air exchange” mode if the humidity level in the house goes up higher than the selected value.
Recommendations for a PRO 200 installed in the basement: “Continuous Circulation” during the winter; “Intermittent Circulation”
during spring, summer, and fall.
CAUTION
Adjust for “Continuous Circulation” during all 4 seasons if your unit is installed in the attic.
Air filter: We recommend that it be cleaned every three months. First, use a vacuum
cleaner to remove the accumulated dust. Then wash it in warm soapy water.
Exterior openings: Clean the exterior intake and exhaust screens at least once a
year, preferably in autumn.
VO0017
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