Easy Access To Chassis; Hidden Controls - Carrier 52S Architects And Engineers' Manual

EASY ACCESS TO CHASSIS

Access to the chassis simply requires removing four
screws and then sliding the chassis out of the sleeve
for service. Once the power is turned off, connectors
can be separated on hard-wire units, or the power cord
can be disconnected on cord-connected units.

HIDDEN CONTROLS

The factory-wired control box houses all control com-
ponents and is quickly accessible without removing
the chassis from the wall sleeve. Remove two screws
and the hinged door lowers, providing quick access to
all the components and the wiring diagram.
Temperature Limiter
The limiter reduces operating costs by allowing the
owner to control the range of cooling and heating tem-
peratures available to the occupant. It is located under
the control panel, out of the occupant's sight. Each set-
back on the limiter is equivalent to 5° F and the range
of temperature settings available to the owner is from
60 to 90 F. The limiter is not pre-set at the factory.
The occupant's temperature control knob is conve-
niently located on the control panel and is clearly
marked with a range of dial settings.
Outdoor Air Vent Control
The vent knob is located under the front panel. This
knob slides to manually open and close the outdoor
vent.
Easy Service Access
Fan Cycle Switch
This switch (not available on wall thermostat models)
allows the fan to operate in 2 modes:
• Continuous — This setting allows the fan to run
continuously, circulating air even when the temper-
ature setting has been satisfied. This setting, which
helps to keep the room temperature closer to the
thermostat setting, is used for maximum comfort.
• Cycle — This setting allows the fan to cycle on and
off with the compressor during heating or cooling.
The fan stops when the temperature setting is
reached. The longer unit off-time makes this option
more energy-efficient with only slightly wider vari-
ations in room temperature.
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