Installation
40 RT-SVX21AC-EN
Field-Installed Control Wiring
An overall layout of the various control options available
with the required number of conductors for each control
device is illustrated in Figure 60, p. 41 and Figure 61, p. 41.
Note: 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.
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 the
Dimensions and Weights chapter for the electrical access
locations provided on the unit and Table 10, p. 41 or
Table 11, p. 41 for AC conductor sizing guidelines, and;
1. Use copper conductors unl
ess othe
rwise 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: Be sure to check all loads and conductors for
grounds, shorts, and mis-wiring.
Figure 58. All units except 10 ton high efficiency units
Figure 59. 10 ton high efficiency units
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.
CONTROL WIRING
CONDUIT
BLACK GASKET
CONTROL WIRING
CONDUIT
FIELD POWERED
CONVENIENCE OUTLET
CONDUIT
SEAL BETWEEN
WIRING AND
CONDUIT WITH
WEATHER PROOF
SEALER TO PREVENT
AIR LEAKAGE
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 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.
NOTICE
Controls Using 24 VAC!
Resistance in excess of 3 ohms per conductor could
cause component failure due to insufficient AC voltage
supply.
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