Handling; Lifting; Roof Curb Mounting; Curb Outside Dimensions And Weights - Greenheck ERVe Installation, Operation And Maintenance Manual

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 piping coils and drains, 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 shown below.
3. Unit must be lifted by all corner lifting points
provided on base structure.
4. Rigger to use suitable mating hardware to attach
to unit corner lifting points.
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.
6 Energy Recovery Ventilator

Roof Curb Mounting

Roof curb details including duct location dimensions,
are available on Roof Curb Assembly Instructions,
Part Number 472119.
Rooftop units require curbs to be mounted first. The
duct connections must be located so they will be
clear of structural members of the building.
1. Factory Supplied Roof Curbs: Roof curbs are
Model GKD. The GKD ships in a knockdown
kit (includes duct adapter) and requires field
assembly (by others). Assembly instructions are
included with the GKD curbs.
2. Install Curb: Locate curb over roof opening and
fasten in place. (Refer to Recommended Roof
Openings). Check that the diagonal dimensions
are within ±1/8 inch of each other and adjust
as necessary. For proper unit operation, it is
important that the installation be level. Shim as
required to level.
3. Install Ductwork: Installation of all ducts should
be done in accordance with SMACNA and AMCA
guidelines. Duct adapter provided to support
ducts prior to setting the unit.
4. Install Insulation: One-inch deep insulation pans
were provided with the curb assembly. Install
insulation prior to setting the unit. Insulation is not
included from the factory.
5. Set the Unit: Lift unit to a point directly above
the curb and duct openings. Guide unit while
lowering to align with duct openings. Roof curbs
fit inside the unit base. Make sure the unit is
properly seated on the curb and is level.

Curb Outside Dimensions and Weights

L
W
Unit Size L W
ERVe-20 61.125 40.375 64.875 44.125
ERVe-35 63.375 48.5
ERVe-45 67.375 55.5
ERVe-55 78.25 65.5
All dimensions are in inches. Weights are for 14-inch high
GKD type curbs.
W
L
LF
WF
Curb Weight
LF WF
(lbs.)
93
67.125 52.25 106
71.125 59.25 120
82 69.188 148