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SEAT
5/8" HEX
0.47
INSTALLATION
Jobsite Survey
Complete the following checks before installation.
1.
Consult local building codes and the NEC (National Elec-
trical Code) ANSI/NFPA 70 for special installation
requirements.
2.
Determine unit location (from project plans) or select unit
location.
3.
Check for possible overhead obstructions which may
interfere with unit lifting or rigging.
Step 1 — Plan for Unit Location
Select a location for the unit and its support system (curb or
other) that provides for minimum clearances required for safe-
ty (including clearance to combustible surfaces), unit perfor-
mance and service access below, around and above unit as
specified in unit drawings. See Fig. 4 (on page 6).
NOTE: Consider also the effect of adjacent units.
Unit may be installed directly on wood flooring or on Class A,
B, or C roof-covering material when roof curb is used.
Do not install unit in an indoor location. Do not locate air inlets
near exhaust vents or other sources of contaminated air.
Although unit is weatherproof, avoid locations that permit wa-
ter from higher level runoff and overhangs to fall onto the unit.
Select a unit mounting system that provides adequate height to
allow for removal and disposal of frost and ice that will form
during the heating-defrost mode as well as allow installation of
condensate trap per requirements. Refer to "Step 10 — Install
External Condensate Trap and Line" on page 16 for required
trap dimensions.
ROOF MOUNT
Check building codes for weight distribution requirements.
Unit operating weight is shown in Table 5.
1. CoreMax is a registered trademark of Fastest, Inc.
1/2-20 UNF RH
0.596
30°
WASHER
This surface provides a metal to metal seal when
torqued into the seat. Appropriate handling is
required to not scratch or dent the surface.
Fig. 8 — CoreMax
CORE
(Part No. EC39EZ067)
O-RING
1/2" HEX
Access Port Assembly
1
Table 5 — Operating Weights
548J
Component
Base Unit
Economizer
Vertical
Horizontal
Powered Outlet
Curb
14-in. (356 mm)
24-in. (610 mm)
Step 2 — Plan for Sequence of Unit Installation
The support method used for this unit will dictate different se-
quences 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
instructions for details)
4.
Prepare bottom condensate drain connection to suit
planned condensate line routing (refer to "Step 10 —
Install External Condensate Trap and Line" on page 16 for
details)
5.
Rig and place unit
6.
Install outdoor air hood
7.
Install condensate line trap and piping
8.
Make electrical connections
9.
Install other accessories
10
45°
DEPRESSOR PER AHRI 720
+.01/-.035
FROM FACE OF BODY
7/16-20 UNF RH
UNITS LB (KG)
07A
630 (286)
50 (23)
70 (48)
35 (16)
115 (52)
197 (89)
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