User manual

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

Supply

SIDE VIEW

END VIEW

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

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