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2
JOHNSON CONTROLS
FORM 145.05-NOM1 (708)
APPROVALS
Designed certified by ETL for indoor installation
only.
LIMITATIONS
The installation of this unit must conform to local
building codes as well as the National Electrical Code
ANSI/NFPA No. 70 – latest edition.
Refer to Table 2 for voltage limitations and Table 3 for
operating limitations.
If the VAV boxes in the conditioned
space have hydronic heating coils
installed, it is the responsibility of the
installing contractor to take appropri-
ate measures to protect the hydronic
coils against low unit supply air tem-
peratures that could result in the freeze
up and rupture of the coils.
UNIT INSPECTION
Immediately upon receiving the unit, it should be
inspected for possible damage which may have
occurred during transit. If damage is evident, it should
be noted on the carrier’s freight bill. A written request
for inspection by the carrier’s agent should be made at
once. See “Instruction” manual Form 50.15-NM for
more information and details.
To ensure warranty coverage, this
equipment must be commissioned
and serviced by an authorized YORK
service mechanic or a qualified ser-
vice person experienced in packaged
rooftop installation. Installation must
comply with all applicable codes, par-
ticularly in regard to electrical wiring
and other safety elements such as relief
valves, HP cut-out settings, design
working pressures and ventilation re-
quirements consistent with the amount
and type of refrigerant charge.
Lethal voltages exist within the control
panels. Before servicing, open and tag
all disconnect switches.
TABLE 2 – VOLTAGE LIMITATIONS
UNIT POWER SUPPLY VOLTAGE VARIATIONS
MINIMUM VOLTS MAXIMUM VOLTS
208-3-60 180 228
230-3-60 207 253
480-3-60 415 506
575-3-60 518 632
TABLE 3 – OPERATING LIMITATIONS
MINIMUM MAXIMUM
ENTERING AIR DX COIL
– DRY BULB
68.0° F 90.0° F
ENTERING AIR DX COIL
– WET BULB
57.0° F 72.0° F
DC COOLING COIL AIRFLOW
VELOCITY
400
FPM
600
FPM
CONDENSER WATER FLOW
2.0
GPM/TON
3.0
GPM/TON
ENTERING COND. WATER
TEMP WITH WATER
ECONOMIZER
50.0° F 115.0° F
ENTERING COND. WATER
TEMP W/O WATER
ECONOMIZER
55.0° F 115.0° F
STEAM HEAT – STEAM
PRESSURE
5 PSIG 15 PSIG
HOT WATER HEAT ENTERING
WATER TEMP
140.0° F 160.0° F
SECTION 2 – INSTALLATION
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