Installation
Unit Weights (dry weights)
| Unit | Approx. Weight (lbs) |
(without coils) | 9,000 | |
(with HW & CW coils) | 12,000 | |
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Recommended Roof Openings
W | Exhaust |
| Outdoor | A |
Air |
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| Air | |||
| Intake |
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| Discharge |
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| D | C | B | 2.50 |
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| From Inside Curb |
L | To Recommended |
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FIGURE 2: Recommended roof openings. | Roof Opening |
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Model |
| A | B | C | D | |
86 | 44 |
| 68.75 | 44 | ||
All dimensions shown are in inches. |
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| Curb Outside Dimensions | ||||
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| Model |
| L | W | |
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| 283.5 | 92.0 | ||
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| Dimensions shown are in inches. | ||||
Roof Curb Mounting
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, which are shipped in a knockdown kit and require field assembly (by others). Assembly instructions are included with the curb.
2.Cut Roof Opening and Locate Curb
Layout the unit roof openings such that the supply discharge & exhaust inlet of the unit will line up with the corresponding ductwork (refer to Recommended Roof Openings). Do not make openings larger than necessary. Be sure to allow for the recommended service clearances. Keep the supply inlet of the unit away from any other exhaust fans. Likewise, position the exhaust discharge opening away from fresh air intakes of any other equipment.
3.Install Curb
Locate curb over roof opening and fasten in place. Check that the diagonal dimensions are within ±1⁄8 inch of each other and adjust as necessary. Shim as required to level.
4.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.
5.Duct Work
Installation of all ducts should be done in accordance with SMACNA and AMCA guidelines.
Duct Size:
80 in. x 30 in.
FIGURE 3: Duct dimensions.
SIDE OF UNIT | BASE |
2.00 
6.00
2.002 IN. INSULATION
1.25
0.75
ROOF CURB
FIGURE 4: Roof curb details.
Dimensions based on
4®
