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Installation
Main Unit Power
WARNING
Proper Field Wiring and Grounding
Required!
Failure to follow code could result in death or serious
injury.
All field wiring MUST be performed by qualified
personnel. Improperly installed and grounded field
wiring poses FIRE and ELECTROCUTION hazards. To
avoid these hazards, you MUST follow requirements
for field wiring installation and grounding as
described in NEC and your local/state/national
electrical codes.
WARNING
Hazardous Voltage!
Failure to disconnect power before servicing could
result in death or serious injury.
Disconnect all electric power, including remote
disconnects before servicing. Follow proper lockout/
tagout procedures to ensure the power can not be
inadvertently energized. Verify that no power is
present with a voltmeter.
Standard Wiring
1. Location of the applicable electrical service entrance is
illustrated in the Dimensions and Weights chapter.
Complete the unit's power wiring connections at HTB1
main power terminal block in unit control panel. Refer to
the customer connection diagram that is shipped with
the unit for specific termination points.
2. Provide proper grounding for the unit in accordance
with local and national codes.
Optional TBUE Wiring (Through-the-
Base Electrical Option)
Location of the applicable electrical service is illustrated
below. Refer to the customer connection diagram that is
shipped with the unit for specific termination points. The
termination points, depending on the customer option
selected would be a factory mounted non-fused disconnect
switch (UDC) or circuit breaker (UCB). If neither a factory
mounted non-fused disconnect switch (UDC) or circuit
breaker (UCB) was factory mounted, field wiring
connections should be terminated in the control box at
main panel power terminal block (HTB1).
Provide proper grounding for the unit in accordance with
local and national codes.
30
Notes:
•
Black gasket is shipped from the factory and is
located in the literature Ship With bag in the
control box. Apply black gasket around conduit
plate on all four sides after installation to
prevent air leakage from the building entering
the electrical enclosures.
•
Seal any unused unit penetrations and around
conduit and wiring at all unit and curb
penetrations.
Field-Installed Control Wiring
WARNING
Hazardous Voltage!
Failure to disconnect power before servicing could
result in death or serious injury.
Disconnect all electric power, including remote
disconnects before servicing. Follow proper lockout/
tagout procedures to ensure the power can not be
inadvertently energized. Verify that no power is
present with a voltmeter.
WARNING
Proper Field Wiring and Grounding
Required!
Failure to follow code could result in death or serious
injury.
All field wiring MUST be performed by qualified
personnel. Improperly installed and grounded field
wiring poses FIRE and ELECTROCUTION hazards. To
avoid these hazards, you MUST follow requirements
for field wiring installation and grounding as
described in NEC and your local/state/national
electrical codes.
An overall layout of the various control options available
with the required number of conductors for each control
device is illustrated in the wiring diagram located on main
control box door.
All field wiring must conform to NEC guidelines as well as
state and local codes.
Control Power Transformer
The 24 volt control power transformers are to be used only
with the accessories called out in this manual.
Transformers rated greater than 50 VA are equipped with
internal circuit breakers. If a circuit breaker trips, turn "Off"
all power to the unit before attempting to reset it.
RT-SVX077A-EN
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