Carrier 50HC Series User Manual

25
CO8283
Fig. 30 -- Powered Convenience Outlet Wiring
UNIT
VOLTAGE
CONNECT
AS
PRIMARY
CONNECTIONS
TRANSFORMER
TERMINALS
208,
230
240
L1: RED +YEL
L2: BLU + GRA
H1 + H3
H2 + H4
460 480
L1: RED
Splice BLU + YEL
L2: GRA
H1
H2 + H3
H4
575 600
L1: RED
L2: GRA
H1
H2
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 15A loading for
continuous duty loads (such as electric heaters for
overnight use). Observe a 50% limit on circuit loading
above 8A (i.e., limit loads exceeding 8A to 30 minutes of
operation every hour).
Maintenance: Periodically test the GFCI receptacle by
pressing the TEST button on the face of the receptacle.
This should cause the internal c ircuit of the receptacle to
trip and open the receptacle. Check for proper grounding
wires and power line phasing if the GFCI receptacle does
not tri p as required. Press the RESET button to c lear the
tripped c ondition.
Fuse on powered type: The factory fuse is a Bussmann
Fusetron T--15, non--renewable screw--in (Edison base)
type plug fuse.
Using unit--mounted convenience outlets: Units with
unit--mounted convenience out let circuits will oft en
require that two disconnects be opened to de--energize a ll
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 Articl e 210, Branch Circuits, for use of convenience
outlets.
SMOKE DETECTORS
Smoke detectors are available as factory--i nstalled options
on 50HC models. Smoke detectors m ay be specified for
Supply Air only or for Return Air without or with
econom izer or in combination of Supply Air and Return
Air. Return Air smoke detectors are arranged for vertical
return configurations only. All c omponents necessary for
operation are factory--provided and mounted. The unit is
factory-- configured for immediate smoke detector
shutdown operation; additional wiring or modifi cations to
unit terminal board may be necessary to complete the unit
and smoke detect or configuration to meet project
requirements.
System
The smoke detect or system c onsists of a four--wire
controller a nd one or two sensors. Its prim ary function is
to shut down the rooftop unit in order to prevent smoke
from circulating throughout the building. It is not to be
used as a life saving device.
Controller
The controller (see Fig. 31) includes a controller housing,
a print ed ci rcuit board, and a clear plastic cover. The
controller ca n be connect ed to one or two compatible duct
smoke sensors. The clear plastic cover is secured t o the
housing with a single captive screw for easy access to the
wiring terminals. The c ontroller has three LEDs (for
Power, Trouble and Alarm) and a manual test/reset button
(on the cover face).
DUCT SMOKE SENSOR
CONTROLLER
CONDUIT NUTS
(SUPPLIED BY INSTALLER)
CONDUIT SUPPORT PLATE
TERMINAL BLOCK COVER
COVER GASKET
(ORDERING OPTION)
CONTROLLER
COVER
FASTENER (2X)
CONDUIT COUPLINGS
(SUPPLIED BY INSTALLER)
CONTROLLER HOUSING
AND ELECTRONICS
ALARM
TROUBLE
POWER
TEST/RESET
SWITCH
C08208
Fig. 31 -- Controller Assembly
50HC

Carrier 50HC Series Specifications

General

Brand	Carrier
Model	50HC Series
Category	Air Conditioner
Language	English