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Handling
While this unit was constructed with quality and
dependability in mind, damage still may occur during
handling of the unit for installation. Exercise extreme
caution to prevent any damage from occurring to the
refrigerant system.
The system design and installation should follow
accepted industry practice, such as described in the
ASHRAE Handbook. Adequate space should be left
around the unit for filter replacement and maintenance.
Sufficient space should be provided on the side of the
unit for routine service and component removal should
that become necessary.
Lifting
WARNING
All factory provided lifting lugs must be used when
lifting the unit. Failure to comply with this safety
precaution could result in property damage, serious
injury or death.
1. Before lifting, be sure that all shipping material has
been removed from unit.
2. To assist in determining rigging requirements,
weights are provided.
3. Unit must be lifted by all lifting lugs provided on
base structure.
4. Rigger to use suitable mating hardware to attach to
unit lifting lugs.
5. Spreader bar(s) must span the unit to prevent
damage to the cabinet by the lift cables.
6. Always test-lift the unit to check for proper balance
and rigging before hoisting to desired location.
7. Never lift units by weatherhoods.
8. Never lift units in windy conditions.
9. Preparation of curb and roof openings should
be completed prior to lifting unit to the roof.
10. Check to be sure that gasketing (supplied by
others) has been applied to the curb prior to
lifting the unit and setting on curb.
11. Do not use fork lifts for handling unit.
®
Recommended Roof Openings & Weights
Position the unit roof opening such that the supply
discharge and exhaust inlet of the unit will line up with
the corresponding ductwork. Be sure to allow for the
recommended service clearances when positioning
opening (see Service Clearances). Do not face the
outdoor air intake of the unit into prevailing wind and
keep the intake away from any other exhaust fans.
Likewise, position the exhaust discharge opening away
from outdoor air intakes of any other equipment. When
cutting only duct openings, cut opening 1-inch larger
than duct size to allow clearance for installation. Area
enclosed by roof curb must comply with clearance
to combustible materials. If the roof is constructed
of combustible materials, area within the roof curb
must be ventilated, left open, or covered with non-
combustible material which has an "R" value of at
least 5. If area within curb is open, higher radiated
sound levels may result. Where the supply or warm air
duct passes thru a combustible roof, a clearance of
1-inch must be maintained between the outside edges
of the duct and combustible material in accordance
with NFPA Standard 90A.
Unit Size
U
ERV-10
26 5
ERV-20
43
ERV-45
58
ERV-90
62
ERV-120
77
All dimensions are in inches *Weight assumes outdoor unit
with filters, weatherhoods and outdoor air intake damper
ERV-10, ERV-20 and ERV-45
ERV-90 and ERV-120
Approx. Weight
V
(lbs.)
20
340
26
860
35
1290
36
3230
38
3700
V
EXHAUST
INTAKE
U
SUPPLY
DISCHARGE
0.50
0.50
U
EXHAUST
INLET
V
V
Energy Recovery Ventilator
EXHAUST
INLET
9
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