(Mar, 2012)
CeilAiR OHS Series Installation, Operation & Maintenance Manual
Air Technology Systems, Inc.
2-10
2.7 Utility Connections
2.7.1 Main Power
The
CeilAiR
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 determine the operating voltage, frequency and
phase of the system (see Figure 5). The nameplate
also provides the full load amps (FLA), the current
the unit will draw under full design load, the minimum
circuit ampacity (MCA) for wire sizing, and the maxi-
mum fuse size (MAX FUSE) for circuit protection.
The unit’s nameplate is located on the outside of the
cabinet within close proximity of the electrical box.
NOTE
If the nameplate states MAX FUSE/CKT BKR, it
is required to use fuses or a HACR type circuit
breaker to protect the system. Other protection
devices are not allowed based upon the product
listing.
The unit is provided with terminals for all required
fi eld-wiring. It is important to identify the options that
were purchased with the unit in order to confi rm
which fi eld connections are required. Refer to the
electrical drawing(s) supplied with the unit for the
power and control fi eld-wiring.
WARNING
Verify power is turned off before making
connections to the equipment.
NOTE
All wiring must conform to local and national
electrical code requirements. Use of copper
conductors 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 specifi ed on the system nameplate. The
supply voltage measured at the unit must be within
±10% of the voltage specifi ed on the system name-
plate.
A manual fused disconnect switch must be installed
per local and national electrical codes for service
of equipment. Do not mount a shipped loose
non-fused service switch or customer supplied
Figure 5- Sample Nameplate
