Greenheck Fan ERVe Roof Curb and Rail Mounting, Lifting with a Crane, Lifting with a Forklift

Lifting with a Crane

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.

Unit Weights (lbs.)

Unit Size	Approx. Weight
ERVe-20	825
ERVe-35	1100
ERVe-45	1275
ERVe-55	1550

The weights shown are a worst case scenario based on the sheet metal and component weights for the unit. These weights include sheet metal weights added together with the largest motors, blowers and accessories for the units.

Lifting with a Forklift

Unit base rail includes fork-able lifting locations. Use weights shown to determine forklift size requirements.

Roof Curb and Rail Mounting

Recommended Roof Opening

	A	1.63
		1.63
	EXHAUST
	INLET
		B
	SUPPLY
	OUTLET
Unit Size	A	B

ERVe-20 22 37

ERVe-35 25 44.5

ERVe-45 27 51.5

ERVe-55 27 60

All dimensions are in inches.

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 (25mm) 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 one inch must be maintained between the outside edges of the duct and combustible material in accordance with NFPA Standard 90A.

4Model ERVe Energy Recovery Unit