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14 TWE-SVX03C-EN
Installation
ƽWARNING
Hazardous Voltage!
Disconnect all electric power,
including remote disconnects before
servicing. Follow proper lockout/
tagout procedures to ensure the
power can not be inadvertently
energized. Failure to disconnect
power before servicing could result
in death or serious injury.
Electrical Connections
1. All electrical lines, sizing,
protection, and grounding must
be in accordance with the
National Electric Code and local
codes.
2. If conduit is used, isolate
whenever vibration transmission
may cause a noise problem
within the building structure.
3. Ensure all connections are tight
and no wires exposed.
4. All accessories must be installed
and wired according to the
instructions packaged with that
accessory.
For air handler power entry only, or
for dual power entry (power entry for
air handler and power entry for
electric heats), the electrical
connections are made in the fan
control box located in the left side of
the air handler and electric heater
respectively. Wiring entrance is
through holes provided in the end of
the air handler cabinet, see Figure 8.
Breaker or fuse size can be selected
using the nameplates attached to the
unit and electric heater. See pages 13
through 22 for typical
interconnecting wiring diagrams.
Table 1. Recommended t’stat wire size
Wire Size
(Gauge)
Maximum Wire Length
Physical distance between Unit & T’stat
22 30 Feet
20 50 Feet
18 75 Feet
16 125 Feet
14 200 Feet
Checkout Procedure
Complete the following “installation
checklist” once installation of field
wiring connections is complete. All
operational checks (unit running)
must be made after the outdoor unit
is installed and system
interconnection is complete.
Installation Checklist
Complete this checklist once the unit
is installed to verify that all
recommended procedures have been
accomplished before the system is
started. Operational checks cannot be
performed until the outdoor unit is
installed and system interconnection
is complete.
• Verify that the unit electrical
power is disconnected.
• Inspect all field wiring
connections. All connections
should be clean and tight.
• Inspect unit ground
connection(s). Ground must
comply with all applicable codes.
• Inspect unit suspension
arrangement (if used). Unit
position must be secure. Remove
any tools or debris found in or
near the unit.
Figure 8.
• Inspect duct outlets. Outlets
must be open and unrestricted.
• Inspect unit drain lines. Pipe
connections must be tight and
drain line unrestricted.
• Inspect fan assembly to insure all
moving parts move freely.
• If unit is horizontally mounted,
make sure secondary drain pan
has been installed.
• Inspect unit for proper filters,
securely installed. All cabinet
panels must be secure.
• Instruct owner/operator on
proper system operating and
maintenance procedure.
Figure 9.