General Electrical Information; Power Connections; Single Point Power; Figure 128 - Single Point Power Connection - Pace PAI Installation And Assembly Manual

SECTION 3 - HANDLING, STORAGE, AND INSTALLATION

GENERAL ELECTRICAL INFORMATION

All field wiring must conform to the
International Building Codes (IBC),
National Electrical Code (NEC) and
local codes.
The AHU is ETL listed. Some compo-
nents are UL labeled. Any changes in
the field may affect its validity.
The current characteristics of phase, cycle and voltage
are stamped on the nameplate of each component.
Use the following instructions to set up the electrical
connections.
• Install electrical conduit connections, which are
made to exposed boxes, to the bottom of the box.
Outdoor installation must be made watertight. The
installing contractor is responsible for electrical
conduit penetrations through the building roof.
• Seal the penetrations through the panels.
• Externally and internally seal the electrical con-
duits that penetrate the AHU exterior (walls, pipe
chase or floors) so that the unconditioned air will
not be drawn into the AHU through and around
the conduit. Unconditioned air will result in con-
densation that will fail components prematurely.
• Check all accessible electrical connections, which
contain several strands of wire, for tightness prior
to start-up. The wires are tightened at the time of
assembly, but check, and retighten them, if neces-
sary. The dangers of a poor connection are over-
heating and component failure.
DO NOT PENETRATE any main or aux-
iliary drain pan or roof of outdoor AHU.
DO NOT PENETRATE wireways in any
manner. The sheet metal channels,
which run along the top panel, contain
electrical wires and connections. Elec-
trical shock and/or damage to the AHU
may result.
Form PA102.20-N1
Electrical drawings are provided in the information
packet on the inside of the AHU access door. Major op-
tional components will have specific electrical and in-
stallation information inside the control panels or will be
attached. Refer to SECTION 5 - WIRING DIAGRAMS
in the Air Handling Units - Operation and Maintenance
Manual (Form PA102.20-OM2) for more information on
the electrical drawings.

POWER CONNECTIONS

Single Point Power

When ordered, the single point power connection pro-
vides the installer with a main disconnect switch as
shown in Figure 128 on page 77. The line side of
this switch (top) is where the installer is to connect his
main power wires. The devices included in the single
point power option are :
• Supply, Return, and Exhaust Fans
• Energy Recovery Wheel
• Gas and Electric Heat
• Ultra-violet Lights

Figure 128 - Single Point Power Connection

Special quoted devices not included in this option may
be purchased with the AHU, and will require separate,
additional power wiring by the installer. When this op-
tion is NOT purchased, the installer is responsible for
wiring to each electrical component.
77
Installation & Assembly Manual │ PACE
LD16607
Issue Date: 07/03/2018
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