1.800.627.4499
12
GR90, EV90, EV90P
ERV
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FIGURE 2.4.1 SEPARATE RETURN AIR AND FRESH AIR SUPPLY
NOTE: ERV blower
may be operated
separate from
furnace blower.
*Use caution to introduce
FA at low velocity and
where good mixing will oc-
cur to minimize discomfort
from drafts
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NOTE: ERV blower
may be operated
separate from
furnace blower.
FIGURE 2.4.0 SEPARATE ROOM AIR PICK-UP—FRESH AIR TO FURNACE RETURN AIR TRUNKLINE
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NOTE: The furnace
blower must be
operated any time
the ERV is operated. Use
furnace fan “on” continu-
ous low speed or optional
FM control to cycle furnace
fan on ERV.
FIGURE 2.4.2 FURNACE RETURN AIR BACK INTO RETURN AIR
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NOTE: ERV blower
may be operated
separate from
furnace blower.
FIGURE 2.4.3 FURNACE RETURN AIR BACK INTO SUPPLY AIR, EV90/P ONLY
UNIT PLACEMENT