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Step 5 — Install Flue Hood (48HJ Rooftop Sec-
tions Only) —
Refer to the 48HJ installation instructions for
information on installing the flue hood.
Step 6 — Install Gas Piping (48HJ Rooftop Sec-
tions Only) —
Refer to the 48HJ installation instructions for
information on installing the gas piping.
Step 7 — Install External Trap For Condensate
Drain —
The condensate from the rooftop unit along with
condensate from the upper coil of the energy recovery section
is internally piped to the condensate pan in the lower section of
the energy recovery section. For this reason, the bottom drain
on the rooftop unit CANNOT be used for a condensate drain.
The
3
/
4
-in. drain connection on the energy recovery section is
located near the bottom left of the exhaust air section. See
Fig. 5A and 5B. The energy recovery section must have a
field-fabricated, external, P-trap installed for condensate drain-
age. Trap must be at least 4-in. deep to protect against freeze-
up. If the drain line is installed downstream from the external
trap, pitch the line away from the unit at 1-in. per 10-ft of run.
Do not use a pipe smaller than the connection (
3
/
4
-in.).
Step 8 — Make Electrical Connections
FIELD POWER SUPPLY — All units except 208/230-v
units are factory wired for the voltage shown on the nameplate.
Unit cabinet must have an uninterrupted, unbroken electri-
cal ground to minimize the possibility of personal injury if
an electrical fault should occur. This ground may consist of
electrical wire connected to unit ground lug in control com-
partment, or conduit approved for electrical ground when
installed in accordance with NEC (National Electrical
Code), ANSI/NFPA, latest edition, and local electrical
codes. Do not use gas piping as an electrical ground. Fail-
ure to follow this warning could result in the installer being
liable for personal injury of others.
Fig. 6A — Rigging Label — COBRA™ Energy Recovery Unit — Sizes 48/50HJ004-007
MAX WEIGHT
A
B
C
lb
kg
in.
mm
in
mm
in.
mm
48HJ004 w/62AQ060
890
404
95.6
2428.20
57.38
1457.30
33.35
847
48HJ004 w/62AQ100
905
411
95.6
2428.20
57.38
1457.30
33.35
847
48HJ005 w/62AQ060
900
409
95.6
2428.20
57.38
1457.30
33.35
847
48HJ005 w/62AQ100
915
415
95.6
2428.20
57.38
1457.30
33.35
847
48HJ006 w/62AQ060
920
418
95.6
2428.20
57.38
1457.30
33.35
847
48HJ006 w/62AQ100
935
425
95.6
2428.20
57.38
1457.30
33.35
847
48HJ007 w/62AQ060
995
452
95.6
2428.20
57.38
1457.30
42.12
1070
48HJ007 w/62AQ100
1010
459
95.6
2428.20
57.38
1457.30
42.12
1070
50HJ004 w/62AQ060
795
361
95.6
2428.20
57.38
1457.30
33.35
847
50HJ004 w/62AQ100
810
368
95.6
2428.20
57.38
1457.30
33.35
847
50HJ005 w/62AQ060
805
365
95.6
2428.20
57.38
1457.30
33.35
847
50HJ005 w/62AQ100
820
372
95.6
2428.20
57.38
1457.30
33.35
847
50HJ006 w/62AQ060
825
375
95.6
2428.20
57.38
1457.30
33.35
847
50HJ006 w/62AQ100
840
381
95.6
2428.20
57.38
1457.30
33.35
847
50HJ007 w/62AQ060
880
400
95.6
2428.20
57.38
1457.30
42.12
1070
50HJ007 w/62AQ100
895
407
95.6
2428.20
57.38
1457.30
42.12
1070
Summary of Contents for COBRA 48HJ004-014
Page 8: ...8 Fig 5A Base Unit Dimensions COBRA Energy Recovery Unit 48 50HJ004 007 with 62AQ060 100 cont...
Page 9: ...9 Fig 5B Base Unit Dimensions COBRA Energy Recovery Unit 48 50HJ008 014 with 62AQ200 300...
Page 10: ...10 Fig 5B Base Unit Dimensions COBRA Energy Recovery Unit 48 50HJ008 014 with 62AQ200 300 cont...
Page 39: ...39 Fig 19 Typical Wiring Schematic Standard Controls cont...