General Wiring Requirements - PMI CF2300 Serie Manual De Uso Y Cuidado

INSTALLATION
CAUTION:
Disconnect all electrical power to the cooler
before attempting to install, open, or service your cooler.
More than one disconnect will be required to de-energize
the equipment for servicing. If the cooler is
thermostatically controlled, the thermostat may not be
used as the power supply disconnect, as it may reset and
start the unit unexpectedly.
Even while routinely inspecting or servicing the inside, the cooler can
be accidentally started. Keep all personnel away from the cooler and
electrical supply when you are working on it. Before servicing or
cleaning unit, switch power off at the service disconnects and lock the
disconnecting means to prevent power from being switched on
accidentally. When the service disconnects cannot be locked,
securely fasten a prominent warning device, such as a tag, to the
service disconnect or panel.
Electric Power Supply / General Wiring Requirements
CAUTION:
All electrical installations must comply with
local and national building & safety codes; all work must
be performed by qualified personnel only.
NOTE - References in this manual to: National Electric Code (N.E.C.),
local or national codes means that those items must comply with
applicable installation codes as specified by the building code
authority having jurisdiction at the installation location. It is the
installer's duty to comply with all requirements.
IMPORTANT:
This UL Listed Industrial Fan Evaporative Air Cooler requires the
use of two separate electrical power supply circuits to the unit:
Fan motor: (depending on model purchased)
The motor may be one of the following voltage combinations:
Single phase - 115, 208, 230 Volt AC / 60 Hz or,
3 phase - 200, 208, 230, 460 Volt AC / 60 Hz
Single phase fan motors are connected to the power supply using a
pre-wired, factory installed cord, plug and receptacle assembly
located in a junction box in the upper corner of the cooler cabinet.
Three phase motors also use a cord, plug and receptacle assembly
that is not factory pre-wired or installed and must be field-wired for the
required voltage (3-phase motors are bi-directional, requiring the
swapping of any two power leads to provide correct rotation of the fan
blades, and is best determined at the time of installation). 3-phase
multi-voltage fan motors (i.e., 208-230/460V) must be properly
connected internally to match the available power supply voltage, per
the connection diagram on the motor's specification plate.
Circulating pump:
Single phase - 115 Volt AC / 60 Hz. The pump power supply circuit
must be a GFCI protected circuit.
Make sure that the circulating pump and fan motor are connected to
the voltage and frequency (Hz) stamped on each component's
specification plate.
NOTE: Improper motor voltage connections will void
motor warranties.
Electrical Ground
For maximum safety, make sure cooler cabinet, blower motor and
pump(s) are properly grounded to a suitable ground connection as
required by all local and national codes.
Safety Disconnect Switches
Each unit must have safety disconnect switches (motor circuit and
pump circuit) compatible with the installation location and installed in
accordance with the National Electric Code (N.E.C.), Article 430
and/or local codes. Each disconnect switch shall be a U.L. Listed
disconnect which breaks all ungrounded conductors that can carry
current to the unit.
Over-current (short circuit) Protection
Each unit must have over-current protection equipment intended to
protect all ungrounded pump and motor branch-circuit conductors,
motor control apparatus, pumps and motors against overcurrent due
to short circuits or ground faults. They shall have minimum enclosure
classifications compatible with the installation location and installed in
accordance with N.E.C., Articles 240 and 430. These devices shall be
U.L. Listed short circuit protection devices, sized and installed in
accordance with specifications as stated in N.E.C., Article 430.
Overload Protection
All pumps and single-phase motors available from Phoenix
Manufacturing, Inc. for use in Industrial Fan Evaporative Air Coolers
have integral thermal running and locked rotor overload protection as
required by the N.E.C.
All 3-phase motors require installation of properly sized and mounted
thermal running / locked rotor overload protection.
Branch circuit protection should be properly sized and installed by a
competent electrician in accordance with local and national code
requirements.
Motor Start Switch / Motor Starter
All motor applications require the use of Start/Stop switches
and/or motor starters of the proper current capacity.
In applications where a switch is deemed adequate to start the motor,
as defined by N.E.C., Article 430, the branch circuit shall be sized in
accordance with N.E.C., Articles 210 and 430. The enclosure for the
switch and its installation location shall comply with N.E.C.
requirements for the installation of the switch.
A motor starter with integral thermal (running and locked rotor)
overload protection is used to start/stop 3-phase motors. Motor starter
shall be sized in accordance with specifications stated in the N.E.C.,
Article 430. Starters mounted to the unit shall have a minimum NEMA
3R (raintight/rainproof) enclosure rating. Starters mounted remote to
the unit shall have a minimum enclosure classification compatible with
the location and installed in accordance with N.E.C., Article 430.
Pump Power Supply Circuit
The pump supply circuit shall be a GFCI protected circuit with
overcurrent (short circuit) protection of 15 AMP and have a minimum
of 600 volt rated, #14 AWG copper wire to the pump receptacle in the
junction box assembly. Conduit to the junction box shall be rain-tight
or liquid-tight, flexible metal conduit with a separate ground wire,
installed per N.E.C., Article 351. Use of a voltage transformer for the
pump power supply circuit is not recommended
Industrial Fan Evaporative Cooler - Use and Care Manual 3