Step 2 - Plan For Sequence Of Unit Installation; Step 3 - Inspect Unit; Step 4 - Provide Unit Support - Bryant LEGACY 580J*16 Series Installation Instructions Manual

Step 2 — Plan for Sequence of Unit Installation —
The support method used for this unit will dictate different
sequences for the steps of unit installation. For example, on curb-
mounted units, some accessories must be installed on the unit
before the unit is placed on the curb. Review the following for
recommended sequences for installation steps.
CURB-MOUNTED INSTALLATION
1. Install curb
2. Install field-fabricated ductwork inside curb
3. Install accessory thru-base service connection package
(affects curb and unit) (refer to accessory installation instruc-
tions for details)
4. Prepare bottom condensate drain connection to suit planned
condensate line routing (see Step 11 — Install External Con-
densate Trap and Line on page 24 for details)
5. Rig and place unit
6. Install outdoor air hood
7. Install flue hood
8. Install gas piping
9. Install condensate line trap and piping
10. Make electrical connections
11. Install other accessories
PAD-MOUNTED INSTALLATION
1. Prepare pad and unit supports
2. Check and tighten the bottom condensate drain connection
plug
3. Rig and place unit
4. Convert unit to side duct connection arrangement
5. Install field-fabricated ductwork at unit duct openings
6. Install outdoor air hood
7. Install flue hood
8. Install gas piping
9. Install condensate line trap and piping
10. Make electrical connections
11. Install other accessories
FRAME-MOUNTED INSTALLATION —
mounted applications generally follow the sequence for a curb in-
stallation. Adapt as required to suit specific installation plan.
Step 3 — Inspect Unit —
damage. File any claim with transportation agency. Confirm be-
fore installation of unit that voltage, amperage and circuit protec-
tion requirements listed on unit data plate agree with power supply
provided.
Frame-
Inspect unit for transportation
Step 4 — Provide Unit Support
ROOF CURB MOUNT — Accessory roof curb details and di-
mensions are shown in Fig. 2-4. Assemble and install accessory
roof curb in accordance with instructions shipped with the curb.
Curb should be level. This is necessary for unit drain to func-
tion properly. Unit leveling tolerances are show in Fig. 7. Refer to
Accessory Roof Curb Installation Instructions for additional infor-
mation as required.
A
B
Fig. 7 — Unit Leveling Tolerances
NOTE: The gasketing of the unit to the roof curb is critical for
a watertight seal. Install gasket supplied with the roof curb as
shown in Fig. 8 and 9. Improperly applied gasket can also re-
sult in air leaks and poor unit performance.
Install insulation, cant strips, roofing felt, and counter flashing
as shown. Ductwork must be attached to curb and not to the unit.
IMPORTANT: If the unit has the factory-installed Thru-
the-base option, make sure to complete installation of the
option before placing the unit on the roof curb.
See the following sections:
Factory-Option Thru-Base Connections
(Gas Connection) on page 22 for sizes 08-14 and page 22
for size 16
Factory-Option Thru-Base Connections
(Electrical Connections) on page 29 for sizes 08-14 and
page 30 for size 16
NOTE: For size 16, if gas and/or electrical connections are
not going to occur at this time, tape or otherwise cover the
fittings so that moisture does not get into the building or
conduit in the interim.
FOR SIZES 08-14 ONLY — The
power and gas connection package must be installed before the
unit is set on the roof curb. If field-installed thru-the-roof curb gas
connections are desired, use factory-supplied
and gas plate assembly to mount the thru-the-roof curb connection
to the roof curb. Gas connections and power connections to the
unit must be field installed after the unit is installed on the roof
curb.
If electric and control wiring is to be routed through the base-
pan, attach the accessory thru-the-base service connections to the
basepan in accordance with the accessory installation instructions.
12
C
A-B B-C A-C
in. (mm) in. (mm) in. (mm)
0.5 (13) 1.0 (25) 1.0 (25)
accessory thru-the-base
/ -in. pipe coupling
1
2