Greenheck Fan ERV-251, ERV-581, ERV-522, ERV-582, ERV-521, ERV-361 Lifting, Recommended Roof Opening

All dimensions are in inches.

Lifting

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 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.

Recommended Roof Opening

V

EXHAUST

INTAKE

U

SUPPLY

DISCHARGE

0.50

0.50

ERV-251, 361, 521 and 581

U

EXHAUST
INLET	SUPPLY DISCHARGE	V

ERV-522 and 582

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 has been applied
	to the curb prior to lifting the unit and setting on
	curb.
11.	Do not use fork lifts for handling unit.

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

Unit Size	U	V
ERV-251	26.5	20
ERV-361	43	26
ERV-521	58	35
ERV-581	60	30
ERV-522	62	36
ERV-582	77	38

	Unit Weights
Unit Size		Approx. Weight (lbs)*
ERV-251		340
ERV-361		860
ERV-521		1290
ERV-581		1470
ERV-522		3230
ERV-582		3700

*Weight assumes outdoor unit with filters, weatherhoods and outdoor air intake damper.

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 ERV Energy Recovery Unit