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user’sinformationmanualSINGLEPACKAGED HEATPUMPUNITS657ASizes024-060Cancels: OM02-53 OM02-65 1/03 Model 657A Packaged Heat Pump Units Without Base Rail Model 657A Packaged Heat Pump Units With Optional Base Rail WELCOME TO EFFICIENT YEAR-ROUND COMFORT Congratulations on your excellent choice and sound investment in home comfort! Your new heat pump represents both the latest in engineering development and the culmination of many years of experience from one of the most reputable manufacturers of comfort systems. Your new unit is among the most reliable home comfort products available today. To assure its dependability, spend just a few minutes with this booklet now. Learn about the operation of your heat pump and the small amount of maintenance it takes to keep it operating at its peak efficiency. With minimal care, your heat pump will provide you and your family with dependable home comfort — both now and for years to come. IMPORTANT FACTS To better protect your investment and to eliminate unnecessary service calls, familiarize yourself with the following facts: WARNING: Improper installation, adjustment, alteration, service, maintenance, or use can cause explosion, fire, electrical shock, or other conditions which may cause personal injury or property damage. Refer to this manual. For assistance or additional information consult a qualified installer, service agency, distributor, or branch office. The qualified installer or agency must use only factory authorized kits or accessories when modifying this product. • Your heat pump system should never be operated without a clean air filter properly installed. Plan to inspect the filter periodically. A clogged air filter will increase operating costs and shorten the life of the unit. • Supply-air and return-air registers should not be blocked. Drapes, furniture, and toys are some of the items commonly found obstructing grilles. Restricted airflow lessens the unit’s efficiency and life span. • Outdoor units must have unrestricted airflow. Do not cover the unit, lean anything against it, or stand upon it. Do not allow grass clippings, leaves, or other debris to accumulate around or on top of the unit. Maintain a 12-inch minimum clearance between the outdoor unit and tall grass, vines, shrubs, et cetera. • Your multipurpose indoor thermostat is the control center for your heat pump system. You should familiarize yourself with its proper operation. Attempting to control the system by other means — for instance, switching the electrical supply power ON and OFF — may cause damage to the unit. • Thermostat ‘‘jiggling’’ causes rapid-cycling, which is potentially damaging to the compressor. Do not move the temperature selector on the thermostat for any reason for at least 5 minutes after the compressor has shut off. • You may find that you can maintain greater personal comfort by running the fan continuously. ‘‘Air pockets’’ can form due to the structure of the building, placement of registers, et cetera. These air pockets may be too cool or warm for your liking. Continuous fan operation minimizes any temperature differences. Also, systems equipped with electronic air cleaners and/or humidifiers offer the added benefits of having the air continuously cleaned year-round, and humidified during the winter season. • Your heat pump will remove humidity from your home during the cooling season. After a few minutes of operation, you should be able to see water trickle from the condensate drain. Check this occasionally to be sure the drain system is not clogged. Of course, don’t expect to see much drainage if you live in a very dry climate. 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 include temperature control selector, FAN switch, and SYSTEM switch. EMERGENCY HEAT control is usually provided with the SYSTEM switch. The temperature control selector isa dial or button(s) that al lows you to establish the 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 heating operation temperature. Typical settings are 78 degrees Fahrenheit for cooling and 68 degrees for heating. The FAN switch offers two options for controlling the blower: AUTO and ON. When set to AUTO, the blower will run during the time the heat pump is operating. When the FAN switch is set at the ON position, the blower will run continuously. Typically, the SYSTEM switch on your thermostat offers the following selections: COOL, OFF, and HEAT. Your thermostat may also have a another selection, AUTO. The heat pump will not operate when the SYSTEM switch is set at the OFF position. With the SYSTEM switch set at COOL, your heat pump will operate in its cooling mode when the in...