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SAFETY CONSIDERATIONS
Improper
installation,
maintenance, or use can cause explosion, fire, electrical
shock or other conditions which may cause personal injury
or property damage. Consult a qualified installer, service
agency, or your distributor or branch for information or
assistance. The qualified installer or agency must use
factory- - authorized kits or accessories when modifying this
product. Refer to the individual instructions packaged with
the kits or accessories when installing.
Follow all safety codes. Wear safety glasses and work
gloves. Use quenching cloths for brazing operations and
have a fire extinguisher available. Read these instructions
thoroughly and follow all warnings or cautions attached to
the unit. Consult local building codes and appropriate
national electrical codes (in USA, ANSI/NFPA70, National
Electrical Code (NEC); in Canada, CSA C22.1) for special
requirements.
It is important to recognize safety information. This is the
safety- - alert symbol
unit and in instructions or manuals, be alert to the
potential for personal injury.
Understand the signal words DANGER, WARNING,
CAUTION, and NOTE. These words are used with the
safety- - alert symbol.
DANGER identifies the most serious hazards which will result
in severe personal injury or death. WARNING signifies hazards
which could result in personal injury or death.
CAUTION is used to identify unsafe practices, which
may result in minor personal injury or product and
property damage.
NOTE is used to highlight suggestions which will result in
enhanced installation, reliability, or operation.
!
ELECTRICAL SHOCK HAZARD
Failure to follow this warning could cause personal
injury or death.
Before performing service or maintenance operations
on unit, always turn off main power switch to unit and
install lock(s) and lockout tag(s). Unit may have more
than one power switch. Ensure electrical service to
rooftop unit agrees with voltage an amperage listed on
the unit rating plate.
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service,
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.
Identifying Factory Option
NOTE: This supplement only applies to units that meet
the criteria detailed in Table 1. If the unit does not meet
that criteria, discard this document.
Table 1 – Model- - Size / EconoMi$er X Option Indicator
Model / Sizes
48/50TC / 08--- 16
48/50TC / 17--- 30
50TCQ / 08--- 14
50TCQ / 17--- 24
48/50HC / 08--- 14
48/50HC / 17--- 28
50HCQ / 08--- 12
48/50LC / 04--- 06
NOTE:
See Fig. 1 for an example of typical Model
Number Nomenclature.
In addition to criteria in Table 1, all 48/50TC/TCQ and
48/50HC/HCQ units equipped with a factory- - installed
EconoMi$er X display a 6 in the 14
number indicating the low leak economizer controller. These
units also display a G in the 17th position of the model number
to indicate that the unit is equipped with the factory- - installed
Staged Air Volume (SAV) 2- - speed indoor fan control system
with Variable Frequency Drive (VFD). The SAV option is
required for units equipped with EconoMi$er X. For detailed
information on the SAV and VFD, see the Staged Air
Volume/Variable Frequency Drive (VFD) Installation, Setup &
Troubleshooting Supplement, Form VFD- - 01SI or latest
version.
The SAV is standard equipment on 48/50LC units.
2
CAUTION
GENERAL
Position in
EconoMi$er FIOP
Model Number
Indicator
15
U or W
15
U, V, W or X
15
U or W
15
U, V, W or X
15
U or W
15
U, V, W or X
15
U or W
15
N or R
th
position of the model
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