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WARNING
ELECTRICAL SHOCK HAZARD
Failure to follow this warning could cause personal injury or
death.
Before performing service or maintenance operations on unit,
turn off main power switch to unit and install lock(s) and lock-
out tag(s). Ensure electrical service to rooftop unit agrees with
voltage and amperage listed on the unit rating plate. Unit may
have more than one power switch.
WARNING
UNIT OPERATION AND SAFETY HAZARD
Failure to follow this warning could cause personal injury,
death and/or equipment damage.
Puron
®
(R-410A) refrigerant systems operate at higher pres-
sures than standard R-22 systems. Do not use R-22 service
equipment or components on Puron refrigerant equipment.
WARNING
PERSONAL INJURY AND ENVIRONMENTAL HAZARD
Failure to follow this warning could cause personal injury or
death.
Relieve pressure and recover all refrigerant before system re-
pair or final unit disposal.
Wear safety glasses and gloves when handling refrigerants.
Keep torches and other ignition sources away from refriger-
ants and oils.
WARNING
CUT HAZARD
Failure to follow this caution may result in personal injury.
Sheet metal parts may have sharp edges or burrs. Use care and
wear appropriate protective clothing, safety glasses and gloves
when handling parts and servicing air conditioning equipment.
MODEL NUMBER NOMENCLATURE AND
DIMENSIONS
See Fig. 1 for 549J model number nomenclature. See Fig. 2 and 3
for unit dimensional drawings. Figure 4 shows service clearance
dimensions.
Rated Indoor Airflow
Table 1 lists the rated indoor airflow used for the AHRI efficiency
rating for the units covered in this document.
Table 1 — Rated Indoor Airflow
MODEL NUMBER
549J*07A
549J*07D
549J*08D
549J*09D
2
RATED INDOOR AIRFLOW
(CFM)
2400
2400
3000
3400
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