•Don’t Worry About Ice On Your Unit
Ice or frost will tend to form on the outdoor coil during the winter heating operation. Your heat pump is designed to automatically melt the ice. When in this defrost cycle, it is normal for steam or fog to rise from the outdoor unit. Do not be alarmed!
•When Not To Use Your Unit
Do not operate your unit in cooling mode when outdoor temperatures are below 55°F.
Do not operate your unit in heating mode when outdoor temperatures are above 66°F.
OPERATING YOUR
HEAT PUMP
The operation of your heat pump system is controlled by the indoor thermostat. You simply adjust the thermostat and it maintains the indoor temperature at the level you select. Most thermostats for heat pump systems have three controls: a temperature control selector, a FAN con- trol, and a SYSTEM or MODE control.
The temperature control selector is a dial, lever, or set of buttons that allows you to establish the degree of temperature that you wish to maintain for your personal comfort. Some thermostats possess two temperature control selectors: one for setting the temperature desired during the cooling cycle, and one to set the heat- ing operation temperature.
The FAN control offers two options for controlling the indoor blower:AUTO and ON. When set to AUTO, the blower runs only during the time the heat pump is operating. When set to ON, the blower will run continuously.
Typically, the SYSTEM or MODE con- trol on your thermostat offers the follow- ing selections: COOL, OFF, HEAT, AUTO, and EMERGENCY HEAT. Some thermostats may have a separate switch for EMERGENCY HEAT. The heat pump will not operate when the SYSTEM or MODE control is set to OFF. With the SYSTEM or MODE con- trol set to COOL, your heat pump will operate in cooling mode when the indoor temperature rises above the level that you wish to maintain. With the SYSTEM or MODE control set to HEAT, your heat pump will provide warmth whenever the indoor temperature falls below the level that you have selected.
The AUTO selection found on some ther- mostats provides for automatic change- over between cooling and heating cycles. With the SYSTEM or MODE control set
to AUTO, cooling mode is activated when the indoor temperature rises above the thermostat cooling temperature set- ting, or heating mode is activated when the indoor temperature drops below the thermostat setting for the heating cycle.
Depending on your typical winter heating needs, your home comfort system may include a supplementary heating source. The EMERGENCY HEAT setting (EHEAT) provides for convenient selec- tion between the two heating appliances. Your heat pump will operate when the SYSTEM or MODE control is set to HEAT. With the SYSTEM or MODE control set to EHEAT, the heat pump will turn off and the supplementary heat source will be activated.
NOTE: Your 2-speed heat pump system has several special features built in to pro- tect the unit.
•5-MINUTE TIME DELAY—Unit will delay operation upon initial start-up or short-cycling of the indoor thermostat.
•1-MINUTE TIME DELAY—When changing speeds from low to high, or high to low, there is a 1 minute time delay. Dur- ing the speed change delay, the outdoor fan will continue to run.
•1-MINUTE HIGH-SPEED MINI- MUM—If the unit has not operated with- in the past 12 hours or has a power interruption, upon the next cooling demand, it will operate for a minimum of 1 minute on high speed.
In certain geographic areas and in cer- tain applications, supplemental heat is not required. Any questions regarding your application should be directed to your dealer.
Your thermostat may be PROGRAM- MABLE or NON-PROGRAMMA-
BLE. A NON-PROGRAMMABLE thermostat (See Fig. 2.) does not allow the temperature settings to be varied throughout the day or week without physically changing the settings. A PROGRAMMABLE thermostat (See Fig. 3.) allows various daily tempera- ture changes to be preset. During the winter for example, you may wish to “set back” the temperature of your home at night, then have the tempera- ture return to normal prior to waking up. The home’s temperature can then be lowered again during the day when no one is at home, but again be at peak comfort level when your family returns home. During the summer, the opposite changes might be programmed. When properly used, this programming can result in energy savings on your home’s heating and cooling.
4
If you wish to program your accessory electronic indoor thermostat, please refer to thermostat Owner’s Manual.
COOLING CYCLE
When operating in cooling cycle, your heat pump will run until the indoor temperature is lowered to the level you have selected. On extremely hot days, your unit will run for longer periods at a time and have shorter off periods than on moderate days.
Your 2-speed heat pump spends about 80% of its time operating in low-speed cooling. This means that it will operate for longer periods of time than a single- speed heat pump even on moderate days. This longer operational time in low speed results in higher efficiency operation, lower operating noise, and better humid- ity control than a single-speed heat pump could achieve.
The following are typical conditions that add extra heat and/or humidity to your home. Your unit will work longer to keep your home comfortable under these conditions:
•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 are open on the sunny side of the home
HEATING CYCLE
With the SYSTEM or MODE control of your indoor thermostat set to HEAT, the heating section of your home com- fort 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 peri- ods to maintain a comfortable environ- ment on cooler days and nights than on moderate ones.
Your 2-speed heat pump spends about 80% of its time operating in low-speed heating. This means that it will operate for longer periods of time than a single- speed heat pump even on moderate days. This longer operational time in low speed results in higher efficiency operation and lower operating noise than a single-speed heat pump could achieve.
SUPPLEMENTAL HEAT
Your heat pump is your primary heating source. Your system may also be