Specifications

19
Table 6 — Airflow vs. Pressure Drop Across ERV Wheel (cont)
NOTE: Pressure sensing ports are provided on both sides of the
ERV wheel for testing and balancing.
UNITS WITH EZERV CONTROL OPTION — With
the EzERV option, the LCD display will change to show the
amount of air moving through the cabinet in cubic feet per
minute (cfm). The screen is divided into two columns: The left
column showing the amount of outside air (Osa/CFM) and the
right column showing the exhaust air (Ext/CFM). To adjust the
fan speeds, remove the small panel next to the control panel
cover to access the user input controls. See Fig. 16.
Balanced Air Option
— Press the push button once to bring
up the ERV cfm screen. Turn the knob clockwise to increase or
counterclockwise to decrease the amount of outside air coming
into the building. See Fig. 17. The exhaust airflow will auto-
matically adjust to equal the supply airflow. Press the button
again to return to the main screen. Replace the user control
cover.
Offset Air Option
— Press the push button once to bring up
the outside air cfm screen. Turn the knob clockwise to increase
or counterclockwise to decrease the amount of outside air com-
ing into the building. See Fig. 18.
Press the push button again to bring up the exhaust air offset
screen. A negative exhaust air offset would equate to a smaller
amount of air being exhausted from the building when com-
pared to the outside air being supplied to the building. Adjust
the knob clockwise to increase and counterclockwise to de-
crease the exhaust offset cfm level. See Fig. 19. Press the
62E
UNIT
AIRFLOW VS. PRESSURE DROP ACROSS ERV WHEEL
LD
cfm 3500 4000 4500 5000 5500 6000 6500 7000 7500 8000 8500 9000 9500 — — — —
in. wg 0.46 0.52 0.59 0.65 0.72 0.78 0.85 0.91 0.98 1.05 1.11 1.18 1.22 — — — —
LG
cfm 5000 6000 6500 7000 7500 8000 8500 9000 9500 10,000 10,500 11,000 11,500 12,000 12,500 13,000 13,500
in. wg 0.49 0.58 0.62 0.66 0.71 0.75 0.79 0.84 0.88 0.92 0.96 1.01 1.05 1.09 1.14 1.18 1.22
MD
cfm 4500 5000 5500 6000 6500 7000 7500 8000 8500 9000 9500 10,000 10,500 11,000 — — —
in. wg 0.50 0.56 0.61 0.67 0.72 0.78 0.83 0.89 0.94 1.00 1.06 1.11 1.17 1.22 — — —
MG
cfm 6000 7000 8000 9000 10,000 10,500 11,000 11,500 12,000 12,500 13,000 13,500 14,000 14,500 15,000 15,500 16,000
in. wg 0.50 0.57 0.65 0.72 0.79 0.83 0.87 0.90 0.94 0.98 1.01 1.05 1.09 1.12 1.16 1.2 1.23
ND
cfm 5500 6000 6500 7000 7500 8000 8500 9000 9500 10,000 10,500 11,000 11,500 12,000 12,500 13,000 13,500
in. wg 0.50 0.55 0.59 0.64 0.68 0.73 0.77 0.82 0.86 0.91 0.96 1.00 1.05 1.09 1.14 1.18 1.23
NG
cfm 7500 8500 9500 10,500 11,500 12,500 13,500 14,500 15,500 16,500 17,500 18,500 19,500 — — — —
in. wg 0.51 0.57 0.63 0.69 0.75 0.81 0.87 0.93 0.99 1.05 1.11 1.17 1.23 — — — —
PD
cfm 6000 7000 8000 8500 9000 9500 10,000 10,500 11,000 11,500 12,000 12,500 13,000 13,500 14,000 14,500 15,000
in. wg 0.48 0.56 0.64 0.68 0.72 0.76 0.80 0.84 0.88 0.92 0.96 1.00 1.04 1.08 1.12 1.16 1.2
PG
cfm 8000 9000 10,000 11,000 12,000 13,000 14,000 15,000 16,000 17,000 18,000 19,000 20,000 21,000 22,000 — —
in. wg 0.48 0.54 0.59 0.64 0.69 0.75 0.80 0.85 0.91 0.96 1.01 1.06 1.12 1.17 1.22 — —
RD
cfm 7000 8000 9000 10,000 11,000 11,500 12,000 12,500 13,000 13,500 14,000 14,500 15,000 15,500 16,000 16,500 17,000
in. wg 0.51 0.58 0.65 0.73 0.80 0.84 0.87 0.91 0.94 0.98 1.02 1.06 1.09 1.13 1.16 1.2 1.24
RG
cfm 9000 10,000 11,000 12,000 13,000 14,000 15,000 16,000 17,000 18,000 19,000 20,000 21,000 22,000 23,000 24,000 —
in. wg 0.49 0.54 0.59 0.64 0.68 0.73 0.78 0.83 0.87 0.92 0.97 1.02 1.07 1.11 1.16 1.21 —
SD
cfm 8000 9000 10,000 11,000 12,000 13,000 13,500 14,000 14,500 15,000 15,500 16,000 16,500 17,000 17,500 18,000 18,500
in. wg 0.49 0.55 0.61 0.67 0.73 0.79 0.82 0.85 0.88 0.91 0.94 0.97 1.00 1.03 1.06 1.09 1.12
SG
cfm 11,000 13,000 15,000 16,000 17,000 18,000 19,000 20,000 21,000 22,000 23,000 24,000 25,000 26,000 27,000 28,000 29,000
in. wg 0.50 0.58 0.66 0.70 0.74 0.78 0.82 0.86 0.90 0.94 0.98 1.02 1.06 1.10 1.14 1.18 1.22
TD
cfm 9000 10,000 11,000 12,000 13,000 14,000 15,000 16,000 17,000 18,000 19,000 20,000 21,000 22,000 — — —
in. wg 0.51 0.56 0.62 0.67 0.73 0.79 0.84 0.90 0.95 1.01 1.07 1.12 1.18 1.23 — — —
TG
cfm 12,000 14,000 16,000 18,000 19,000 20,000 21,000 22,000 23,000 24,000 25,000 26,000 27,000 28,000 29,000 30,000 31,000
in. wg 0.50 0.58 0.65 0.73 0.76 0.80 0.84 0.87 0.91 0.95 0.99 1.02 1.06 1.10 1.13 1.17 1.21
UD
cfm 10,000 11,000 12,000 13,000 14,000 15,000 16,000 17,000 18,000 19,000 20,000 21,000 22,000 23,000 24,000 25,000 —
in. wg 0.40 0.54 0.59 0.64 0.69 0.74 0.79 0.83 0.88 0.93 0.98 1.03 1.08 1.13 1.18 1.23 —
UG
cfm 14,000 16,000 18,000 20,000 22,000 24,000 25,000 26,000 27,000 28,000 29,000 30,000 31,000 32,000 33,000 34,000 35,000
in. wg 0.51 0.58 0.64 0.71 0.77 0.84 0.87 0.90 0.93 0.97 1.00 1.03 1.06 1.10 1.13 1.16 1.19
Fig. 16 — LCD Display
a62-384.eps
Fig. 17 — ERV Cfm Screen
a62-385.eps
Fig. 18 — Outside Air Cfm Screen
-386.eps