Carrier 50TCQD14 Installation Instructions Manual page 20

Pwd-CO
Fuse
Switch
Convenience
Outlet
GFCI
Disconnect
Access Panel
Fig. 30 - - Convenience Outlet Location
Unit- - powered type: A unit- - mounted transformer is
factory- - installed to stepdown the main power supply
voltage to the unit to 115- - v at the duplex receptacle. This
option also includes a manual switch with fuse, located in
a utility box and mounted on a bracket behind the
convenience outlet; access is through the panel beneath
the control box. See Fig. 30.
The primary leads to the convenience outlet transformer
are not factory- - connected. Selection of primary power
source is a customer- - option. If local codes permit, the
transformer primary leads can be connected at the
line- - side terminals on the unit- - mounted non- - fused
disconnect or HACR breaker switch; this will provide
service power to the unit when the unit disconnect switch
or HACR switch is open. Other connection methods will
result in the convenience outlet circuit being de- - energized
when the unit disconnect or HACR switch is open. See
Fig. 31. On a unit without a unit- - mounted disconnect,
connect the source leads to the main terminal block
(TB1).
If the convenience outlet transformer is connected to the
line side of a field disconnect, the conduit provided with
the unit must be used to protect the wire as they are routed
from the transformer to the field disconnect. The end of
the conduit with the straight connector attaches to the
field disconnect. The other end does not need to connect
to the transformer; however, the conduit must be routed so
that all wiring is either in the conduit or behind the access
panel.
If the convenience outlet transformer is connected to the
line side of the factory disconnect option, route the wires
through the web bushing located on the bottom of the
disconnect box. For the load side wiring to the factory
option disconnect, route the wires through the hole on the
right side of the disconnect. Be sure to create a drip loop
at least 6 inches long.
Duty Cycle: the unit- - powered convenience outlet has a
duty cycle limitation. The transformer is intended to
provide power on an intermittent basis for service tools,
lamps, etc; it is not intended to provide 15- - amps loading
for continuous duty loads (such as electric heaters for
overnight use). Observe a 50% limit on circuit loading
above 8- - amps (i.e., limit loads exceeding 8- - amps to 30
minutes of operation every hour).
Test the GFCI receptacle by pressing the TEST button on
the face of the receptacle to trip and open the receptacle.
Check for proper grounding wires and power line phasing
if the GFCI receptacle does not trip as required. Press the
RESET button to clear the tripped condition.
Pwd-CO
Transformer
C10361
UNIT
VOLTAGE
208,
230
460
575
Fig. 31 - - Unit Powered Convenience Outlet Wiring
Fuse on power type: The factory fuse is a Bussman
"Fusetron" T- - 15, non- - renewable screw- - in (Edison base)
type plug fuse.
ELECTRICAL OPERATION HAZARD
Failure to follow this warning could result in personal
injury or death.
Using unit- - mounted convenience outlets: Units with
unit- - mounded convenience outlet circuits will often
require that two disconnects be opened to de- - energize
all power to the unit. Treat all units as electrically
energized until the convenience outlet power is also
checked and de- - energization is confirmed. Observe
National Electrical Code Article 210, Branch Circuits,
for use of convenience outlets.
20
CONNECT PRIMARY
AS CONNECTIONS
L1: RED +YEL
240
L2: BLU + GRA
L1: RED
480 Splice BLU + YEL
L2: GRA
L1: RED
600
L2: GRA
WARNING
!
C08283
TRANSFORMER
TERMINALS
H1 + H3
H2 + H4
H1
H2 + H3
H4
H1
H2