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EV-Series Indoor
ERV
OPERATION
6.5 NORMAL OPERATION
A wide variety of control schemes may be selected by the engineer, installer, or owner to
meet the ventilation needs of the facility. These may include timer clocks, occupancy sensors,
dehumidistats (for cool-weather operation), carbon dioxide sensors, and others. DDC systems
may also control the unit. Most control schemes will operate the unit only when needed.
Continuous operation is acceptable in virtually all conditions. Unit will not be damaged
by continuous operation as long as air flow occurs. Blower motors may overheat if filters
become completely blocked due to lack of maintenance. Motors are thermally protected. With
continuous operation, some external frosting may occur in very cold weather (see Section 6.6).
Pleated_Filter_PD_AUG17
14x20x2 MERV 8 (IOM)
0.0
0.1
0.2
0.3
0.4
200
300
400
500
600
Clean
-filter Pressu
re
D
ro
p
(in
.w
.g.)
Unit Airflow (CFM)
Initial Pressure Drop of MERV 8 Filters
supplied with this unit
FIGURE 6.4.1 INITIAL PRESSURE DROP OF MERV 8 FILTERS, SUPPLIED WITH THIS UNIT
FIGURE 6.4.2 INITIAL PRESSURE DROP OF MERV 13 FILTERS, AVAILABLE AS AN ACCESSORY
Pleated_Filter_PD_AUG17
14x20x2 MERV 13 (IOM)
0.0
0.1
0.2
0.3
0.4
200
300
400
500
600
Clean
-filter Pressu
re
D
ro
p
(in
.w
.g.)
Unit Airflow (CFM)
Initial Pressure Drop of MERV 13 Filters
(available option)
6.4.1 Filter Pressure Drop
