Carrier 52S manual Description of Switch Settings, NON-USER Adjustable Switches

DESCRIPTION OF SWITCH SETTINGS

OFF BUTTON Ð The OFF button terminates unit operation.

FAN ONLY BUTTON Ð Push button for air circula- tion without heating or cooling.

HIGH HEAT OR HIGH COOL Ð Push button and

rotate temperature knob to desired comfort level. This function provides maximum heating or cooling, and is recommended to raise or lower the room temperature quickly.

LOW HEAT OR LOW COOL Ð Push button and ro- tate the temperature knob to desired comfort level. This function provides minimum heating or cooling with maximum dehumidi®cation. This setting also allows for very quiet fan operation.

FINDING TEMPERATURE SETTING FOR COM- FORT LEVEL Ð Set temperature knob between num-

ber 5 and number 6. Push High or Low Heat or Cool button and allow unit to run for 15 to 30 minutes. If room is not comfortable, turn knob one number setting at a time. When room is comfortable, keep control knob at that position.

A. 52S COOLING ONLY UNIT

NON-USER ADJUSTABLE SWITCHES

OUTSIDE OR VENT AIR Ð Push the FAN ONLY

button and slide vent lever to OPEN position.

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

CON Ð Fan runs continuously, circulating air even when the temperature setting has been satis®ed. This helps to maintain the room temperature closer to the thermo- stat setting.

CYC ÐFan cycles on and off with the compressor dur- ing heating or cooling. Fan stops when the temperature setting is satis®ed. This results in longer unit off-time and slightly larger variations in room temperature and humidity.

Units built after the start of 1996 incorporate single- pole, double-throw fan cycle switches that have only 3 terminals. Units built prior to 1996 incorporate a double- pole, double-throw fan cycle switch with 6 terminals and a thermostat bulb heater. The additional terminals control the thermostat bulb heater.

OUTDOOR THERMOSTAT (52SQ Units Only) Ð

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 coun- terclockwise), disables all compressor operating modes, both heating and cooling.

B.52S COOLING/HEATING UNIT

C.52S COOLING/HEATING UNIT WITH REMOTE CONTROL (BLANK PLATE)

FIGURE 48 Ð SAMPLE CONTROL PANELS

CLOSED

VENT

OPEN

HEAT

PUMP

ELECTRIC

HEAT

CON

CYC

VENT

LEVER

OUTDOOR THERMOSTAT (ON HEAT PUMP ONLY)

FAN CYCLE SWITCH (NOT ON RC UNITS)

FIGURE 49 Ð CONTROLS LOCATION

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