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R250| LGR Dehumidifier Installation, Operation, and Maintenance Instructions
3.10 BYPASS CONTROL
Below 90°F - When the Phoenix R250 is used in normal dehumidifier operating
temperatures (below 90°F), the bypass cover must close the bypass openings,
figure 4. This maximizes performance by increasing the amount of air that is
dehumidified across the evaporator. This temperature range is often found during
the first 24 hours of a drying job.
Above 90°F - When the Phoenix R250 is used in high temperature conditions above
90°F, reposition the bypass cover to open the bypass holes, figure 5. This improves
dehumidifier efficiency by increasing the amount of airflow over the condenser and
lowering the refrigerant pressure. Simultaneously, this slows the airflow across
the evaporator allowing the air temperature to be lowered to the dew point and
increases dehumidifier capacity. These higher temperatures are often found after
the first 24 hours.
4 MAINTENANCE
4.1 AIR FILTER
The Phoenix R250 is equipped with a pleated media air filter that must be checked
regularly. The standard filter is a MERV-11 high efficiency filter. Operating the unit
with a dirty filter will reduce the dehumidifier’s capacity and efficiency and may force
the unit into defrost causing the compressor to cycle “off” and “on” unnecessarily.
The filter can generally be vacuumed clean several times before needing
replacement. Replacement filters can be ordered from the distributor or purchased
locally if available.
Figure 4: Below 90° (Normal)
Figure 6: Remove filter, snap Bypass
cover into position shown, and
replace filter.
Figure 5: At or above 90°
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