26
Fuse on power type: The factory fuse is a Bussman
“Fusetron” T--15, non--renewable screw--in (Edison base)
type plug fuse.
B50HJ542739
Maximum Continuous use : 8 Amps 24/7
Convenience Outlet Utilization
NOTICE
C13415
Fig. 39 -- Convenience Outlet Utilization Notice Label
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.
Convenience outlet usage rating:
Continuous usage: 8 amps maximum
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.
HACR —
The amp rating of the HACR factory installed option is
based on the size, voltage, indoor motor and other
electrical options of the unit as shipped from the factory.
If field installed accessories are added or changed in the
field (i.e. electric heat, power exhaust, ERV), the HACR
may no longer be of the proper amp rating and therefore
will need to be removed from the unit. See unit nameplate
and label on factory installed HACR for the amp rating of
the HACR that was shipped with the unit from the factory.
See unit nameplates for the proper fuse, HACR or
maximum over--current protection device required on the
unit with field installed accessories.
C12105
Fig. 40 -- HACR Caution Label
Factory--Option Thru--Base Connections (Electrical
Connections)—
This service connection kit consists of a
1
/
2
-- i n N P T g a s
adapter fitting (brass), a
1
/
2
--in electrical bulkhead
connector and a
3
/
4
--in electrical bulkhead connector, all
factory--installed in the embossed (raised) section of the
unit basepan in the condenser section. The
3
/
4
-- i n
bulkhead connector enables the low--voltage control wires
to pass through the basepan. The
1
/
2
--in electrical
bulkhead connector allows the high--voltage power wires
to pass through the basepan. See Fig. 16.
Check tightness of connector lock nuts before connecting
electrical conduits.
Field--supplied and field--installed liquid tight conduit
connectors and conduit may be attached to the connectors
on the basepan. Pull correctly rated high voltage and low
voltage through appropriate conduits. Connect the power
conduit to the internal disconnect (if unit is so equipped)
or to the external disconnect (through unit side panel). A
hole must be field cut in the main control box bottom on
the left side so the 24--v control connections can be made.
Connect the control power conduit to the unit control box
at this hole.
Units without Thru--Base Connections —
1. Install power wiring conduit through side panel open-
ings. Install conduit between disconnect and control
box.
2. Install power lines to terminal connections as shown
in Fig. 30.
Voltage to compressor terminals during operation must be
within voltage range indicated on unit nameplate. See
Tables 6 and 7. On 3--phase units, voltages between
phases must be balanced within 2% and the current within
10%. Use the formula shown in the legend for Tables 6
and 7., Note 2 to determine the percent of voltage
imbalance. Operation on improper line voltage or
excessive phase imbalance constitutes abuse and may
cause damage to electrical components. Such operation
would invalidate any applicable Carrier warranty.
Field Control Wiring —
The 48LC unit requires an external temperature control
device. This device can be a thermostat (field--supplied)
or, the RTU Open Controller for Building Management
Systems using non--CCN protocols (RTU Open is
available as a factory--installed option only)., or a space
temperature sensor (SPT) with factory installed
ComfortLINK controller.
Thermostat —
Install a Carrier--approved accessory thermostat according
to installation instructions included with the accessory.
For complete economizer function and 2 stage compressor
operation, select a two--stage cooling thermostat. Locate
the thermostat accessory on a solid wall in the conditioned
space to sense average temperature in accordance with the
thermostat installation instructions.
If the thermostat contains a logic circuit requiring 24--v
power, use a thermostat cable or equivalent single leads of
different colors with minimum of seven leads. If the
thermostat does not require a 24--v source (no “C”
48HC48LC
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