Carrier 52C, P manual Description of Selector Switch Settings Figure, NON-USER Adjustable Controls

DESCRIPTION OF SELECTOR SWITCH SETTINGS (Figure 44)

■OFF MODE — The OFF position terminates unit operation.

■FAN ONLY MODE — Use fan only position for air circulation without heating or cooling. Fan runs at high speed.

■HIGH HEAT OR HIGH COOL MODE — Position selector and temperature control knobs to desired com- fort level. This function provides maximum heating or cooling, and is recommended to raise or lower the room temperature quickly.

■LOW HEAT OR LOW COOL MODE — Position selector and temperature control knobs to desired com- fort level. This function provides minimum heating or cooling with maximum dehumidification during cooling. This setting also allows for very quiet fan operation.

■FINDING TEMPERATURE SETTING FOR COM- FORT LEVEL — Set temperature knob in the middle. Select High Heat, Low Heat or Cool position and allow unit to run for 15 to 30 minutes. If room is not comfort- able, turn knob setting slowly to change setting. When room is comfortable, keep control knob at that position.

NON-USER ADJUSTABLE CONTROLS

■OUTSIDE OR VENT AIR — Slide the vent lever to the fully open position for outside air or fully closed position for vented air.

■FAN CYCLE — The fan cycle switch allows the fan to operate in 2 modes:

CON — Fan runs continuously, circulating air even when the temperature setting has been satisfied. This helps to maintain the room temperature closer to the thermostat setting.

CYC —Fan cycles on and off with the compressor during heating or cooling. Fan stops when the temper- ature setting is satisfied. This results in longer unit off-time and slightly larger variations in room temper- ature and humidity.

■OUTDOOR THERMOSTAT (52CQ, PQ Units Only)

— The outdoor thermostat has 2 operating modes. The heat pump mode (selector screw set fully clockwise), allows the unit to operate normally in the reverse cycle mode. The electric heat mode (selector screw set fully counterclockwise), disables all compressor operating modes, both heating and cooling for units with mounted controls. For wall thermostat controlled mod- els the compressor is only disabled in heating and still allowed to run in cooling.

TYPICAL 52C UNIT CONTROLSTYPICAL 52C UNIT WITH

WALL THERMOSTAT CONTROLS (Blank Plate)

FIGURE 44 — TYPICAL CONTROL PANEL (52C Unit Shown)

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