Stulz FLAIR series, Installation, Operation And Maintanance Manual

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(©Aug, 2007)
FLAiR Series Installation, Operation & Maintenance Manual
Air Technology Systems, Inc.
2-7
2.7 Utility Connections
2.7.1 Main Power
The FLAiR product offering is available in single or
three phase variations and a wide range of voltages. It
is imperative that the unit nameplate be examined to
verify operating voltage, frequency and phase of the
system, (see Figure 6). The nameplate also provides
the full load amps (FLA), the current that the unit will
draw under full design load, the minimum circuit
ampacity (MCA) for wire sizing, and the maximum
fuse or HACR (Heating, Air Conditioning, Refrigeration)
breaker size (MAX FUSE/CKT BKR) for circuit protec-
tion. The unit's nameplate is located inside the cabinet
within the electrical box.
NOTE
If the nameplate states MAX FUSE/CKT BKR,
it is required to utilize fuses or HACR type cir-
cuit breakers to protect the system. Other pro-
tection devices are not allowed based upon the
product listing.
The unit is provided with terminals for all required field-
wiring connections. Refer to the electrical schematic
supplied with the unit for all power and control field-
wiring connections. It is important to identify the
options that were purchased with the unit in order to
confirm which field connections are required.
WARNING
Verify power is turned off before making connec-
tions to the equipment.
NOTE
All wiring must conform to local and national elec-
trical code requirements. Use of copper conduc-
tors only is required. Wiring terminations may
become loose during transit of the equipment;
therefore, it is required to verify that all wiring
terminations are secure.
It is important to verify that the main power supply
coincides with the voltage, phase and frequency
information specified on the system nameplate. The
supply voltage measured at the unit must be within
±10% of the voltage specified on the system name-
plate.
The unit is provided with main power and control pilot
holes for connection of the field-wiring conduit. These
pilot holes are located on the left side of the
FLAiR
unit. A label stating "MAIN POWER INPUT" is in
close proximity. Pilot holes may be drilled in the back
of the cabinet or in the floor if desired. (See the
installation drawing provided with your unit for optional
entrance locations.) The main power wires are to be
terminated at the line side of the main power service
switch located within the electric box. A separate
equipment ground lug is provided within the electrical
box for termination of the earth ground wire.
Figure 6- Sample Nameplate