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2
INSTALLATION
Step 1 — Inspect Shipment —
File a claim with the
shipping company if shipment is incomplete or damaged. See
Fig. 1 for a typical shipping packaging for a COBRA™ energy
recovery unit.
Step 2 — Provide Unit Support
ROOF CURB — The COBRA energy recovery unit can use a
full-perimeter roof curb or a standard roof curb for the rooftop
section of the unit with a supplemental equipment support for the
energy recovery section. The supplemental equipment support is
not required. The standard rooftop unit roof curb is capable of
supporting both the rooftop unit section and the energy recovery
section. Assemble and install accessory roof curb in accordance
with instructions shipped with curb. See Fig. 2A-4. Install insu-
lation, cant strips, roofing felt, and counter flashing as shown.
Ductwork must be attached to curb, not to the unit. The accesso-
ry thru-the-bottom power and gas connection package must be
installed before the unit is set on the roof curb.
Deck pans
37 3/16"
14"
Deck pans
R1
Supply
SIDE VIEW
END VIEW
2"
2" Return support.
Only used on some
applications.
DUCT OPENING SIZES
Supply = 13 7/8" x 20 1/4"
R1 = 13 5/8" x 17 3/4"
R2 = 13 5/8" x 12 5/16"
R1 = Return from building to HVAC
R2 = Return from building to 62AQ
R2
3 1/4
67 3/8"
37 3/16"
92 1/2"
14”
Fig. 1 — Shipping Packaging (48/50HJ004-006 Shown)
Fig. 2A — COBRA Energy Recovery Unit Full-Perimeter Roof Curb — 48/50HJ004-007 with 62AQ060,100