System Control
The SYSTEM or MODE control on your thermostat offers the following selections: COOL, OFF, HEAT, and EM HEAT. Neither the cooling nor heating equipment will operate when the SYSTEM or MODE control is set to OFF. With the SYSTEM or MODE control set to COOL, your unit will operate in cooling mode. With the SYSTEM or MODE control set to HEAT, your unit will operate in heating mode.
Auxiliary Heating
Your system also includes an auxiliary electric heating source. The SYSTEM or MODE control options HEAT and EM HEAT provide convenient selection between the two heating appliances. The heat pump will operate when SYSTEM or MODE control is set to HEAT. The auxiliary electric heater may also be used on cold days to supplement heat pump heating. With the SYSTEM or MODE control set to EM HEAT, the heat pump is turned off and the auxiliary electric heat is activated. The unit is now operating as an electric furnace.
On heat pump systems, the wall thermostat regulates the use of auxiliary electric heat to maximize energy efficiency and your home comfort.
COOLING CYCLE
When operating in the cooling cycle, your unit will operate until the indoor temperature is lowered to the level you have selected on the indoor thermostat. On extremely hot days, your unit will operate for longer periods of time and have shorter “off” periods than on moderate days.
The following are typical conditions that add extra heat and/or humidity to your home and force your cooling unit to work longer to keep your home comfortable:
•Entrance doors are frequently opened and closed.
•Laundry appliances are being operated.
•A shower is running.
•More than the usual number of people are present in the home.
•More than the normal number of electric lights are in use.
•Drapes or blinds are open on the sunny side of the building or home.
HEATING CYCLE
With the SYSTEM control of your indoor thermostat set to HEAT, the heating section of your home comfort system will operate until room temperature is raised to the level you have selected. Of course, the heating unit will have to operate for longer periods to maintain a comfortable environment on cooler days and nights than on moderate ones. When the demand is greater than the capacity of the heat pump alone, the auxiliary electric heaters will supplement the heat pump.
NOTE:
DEFROST CYCLE
When your heat pump is providing heat to your home and the outdoor temperature drops below 45°F, moisture may begin to freeze on the surface of the
The defrost cycle will occur only if ice is sufficient to interfere with normal heating operation. After ice is melted from the outdoor- air coil, the unit automatically switches back to normal heating mode.
Do not be alarmed if steam or fog appears at the
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