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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.
Standard Wiring
The electrical service must be protected from over current
and short circuit conditions in accordance with NEC
requirements.
Protection devices must be sized according to the electrical
data on the nameplate.
•
If the unit is not equipped with an optional factory
installed nonfused disconnect switch, a field supplied
disconnect switch must be installed at or near the unit
in accordance with the National Electrical Code (NEC
latest edition).
•
Location of the applicable electrical service entrance is
illustrated in
"Dimensional Data," p.
unit's power wiring connections onto either; the main
terminal block HTB1 inside the unit control panel, the
factory mounted nonfused disconnect switch (UCD), or
the electric heat terminal block. Refer to the customer
connection diagram that shipped with the unit for
specific termination points.
•
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 nonfused
disconnect switch (UDC).
•
Provide proper grounding for the unit in accordance
with local and national codes.
20
10. Complete the
Figure 13. Through the base electrical option
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 Vac are equipped with
internal circuit breakers. If a circuit breaker trips, turn "Off"
all power to the unit before attempting to reset it.
The transformer is located in the control panel. The circuit
breaker is located on the left side of the transformer and
can be reset by pressing in on the black reset button.
Controls using 24 Vac
Before installing any connecting wiring, refer to
"Dimensional Data," p. 10
locations provided on the unit and
conductor sizing guidelines.
NOTICE
Use Copper Conductors Only!
Failure to use copper conductors could result in
equipment damage as the equipment was not
designed or qualified to accept other types of
conductors.
1. Use copper conductors unless otherwise specified.
2. Ensure that the AC control wiring between the controls
and the unit's termination point does not exceed three
(3) ohms/conductor for the length of the run.
Note: Resistance in excess of 3 ohms per conductor
could cause component failure due to insufficient
AC voltage supply.
3. Be sure to check all loads and conductors for grounds,
shorts, and mis-wiring.
4. Do not run the AC low voltage wiring in the same
ELECTRO MECHANICAL
TBU FIELD WIRING.
ROUTE FIELD WIRING AS
SHOWN
for the electrical access
Table 3, p. 21
for AC
RT-SVX50M-EN
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