1.800.627.4499
2
GR90, EV90, EV90P
ERV
There is no known safe level of cigarette smoke. Any venti-
lation system may provide noticeable improvement in spaces
where cigarettes are smoked, but it cannot be expected to pro-
tect against the severe long-term health hazards of exposure
to cigarette smoke.
WARNING
Provide Adequate Service Access for Maintenance
The unit will require regular filter and core inspections. Install
the unit where you can access the core for cleaning and
replacing the filters, and where you can get at the wiring for
installation and service.
CAUTION
1. To avoid motor bearing damage and noise and/or unbal-
anced mpellers, keep drywall spray, construction dust, etc.,
out of unit.
2. Do not connect power to the units external control terminals:
this will damage the unit. The external terminals are for
use only with unpowered controls designed for low-voltage
operation.
CAUTION
Risk of Fire, Electric Shock, or Injury. Observe all Codes and
the Following:
1. Before servicing or cleaning the unit, unplug the line cord.
make sure unit is not running before opening its door.
2. This installation manual shows the suggested installation
method. Additional measures may be required by local codes
and standards.
3. Installation work and electrical wiring must be done by qual-
ifed professional(s) in accordance with all applicable codes,
standards, and licensing requirements.
4. Any structural alterations necessary for installation must
comply with all applicable building, health, and safety code
requirements.
5. Connect this unit only to a 120 VAC grounded receptacle
protected by a 15 or 20 amp circuit breaker. Do not remove
the unit's line cord.
6. Do not install unit or controls where they can be reached
from a tub or shower.
7. This unit must be properly ducted to the outdoors.
8. Outside air inlet for this unit must be located away from
sources of hazardous air such as auto exhausts.
9. Sufficient air is needed for proper combustion and exhaust-
ing of gases through the flue (chimney) of fuel burning
equipment that might be installed in the area affected by
this equipment. If this unit is exhausting air from a space in
which chimney-vented fuel burning equipment is located,
take steps to assure that combustion air supply is not affect-
ed. Follow the heating equipment manufacturer's require-
ments of applicable codes and standards.
10. This unit is intended for general ventilating only. Do not use
to exhaust hazardous or explosive materials and vapors.
Do not connect this unit to range hoods, fume hoods, or
collection systems for toxics.
11. When cutting or drilling into wall or ceiling, do not damage
electrical wiring and other hidden utilities.
12. Use the unit only in the manner intended by the manufac-
turer. If you have questions, contact the manufacturer.
WARNING
Do not remove or disable the wiring interconnection
between the Overload Relays and the Contactors. Without
this inter-connection the motor(s) will not be protected
against overload.
CAUTION
DO NOT WASH THE ENERGY EXCHANGE CORE.
Keep it away from water or fire to avoid damaging it. Always
handle the core carefully.
CAUTION
