Manual
11. Ice or frost will tend to form on the 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!
12. Do not operate your unit in cooling mode when outdoor temperatures are below 40°F unless your unit was modified for low-ambient
operation.
13. Do not operate your unit in heating mode when outdoor temperatures are above 66°F unless you set your thermostat to emergency heat
mode.
/_ WARNING: To prevent serious injury, death, or property damage, read and follow all instructions and warnings,
including labels shipped with or attached to unit before operating your new heat pump.
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 3 controls: a temperature control selector, a FAN control, and
a SYSTEM or MODE control.
PROCEDURE I--COOLING MODE
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Fig. 3--Payne Non-Programmable Thermostat
When operating in cooling mode, your heat pump will run in cooling mode until the indoor temperature is lowered to the level you have selected.
On extremely hot days, your heat pump will run for longer periods at a 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. Your heat pump will work longer to keep your home
comfortable under these conditions:
1. Entrance doors are frequently opened and closed
2. Laundry appliances are being operated
3. A shower is running
4. More than the usual number of people are present in the home
5. More than the normal number of electric lights are in use
6. Drapes are open on the sunny side of the home
PROCEDURE 2--HEATING MODE
With the SYSTEM or MODE control of your indoor thermostat set to HEAT, your heat pump will run in heating mode until room temperature
is raised to the level you have selected. Of course, your heat pump will have to operate for longer periods to maintain a comfbrtable enviromnent
on cooler days and nights than on moderate ones.
PROCEDURE 3--SUPPLEMENTAL HEAT
Your heat pump is your primary heating source. Your system may also be equipped with a supplemental heating source such as electric heat. On
cold days and nights, your system will automatically turn on the supplemental heat in order to maintain the level of comfort you have selected.
When your heat pump needs additional heat to keep you comfortable, your Payne electronic thermostat will turn on the supplemental heat (if
equipped) and will display the "AUX HT" message.
PROCEDURE 4---DEFROST MODE
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 coil. If allowed to build up, this ice would impede airflow across the coil and reduce the amount of heat absorbed from the outside air. So,
to maintain energy-efficient operation, your heat pump has an automatic defrost mode. The defi'ost mode starts at a preset time interval of 90
minutes, although, it may be reset to either 30 or 50 minutes. Defrost will start at the preset time only if the ice is sufficient to interfere with normal
heating operation. After the ice is melted from the coil, or after a maximum of 10 minutes in def}ost mode, the unit automatically switches back
to normal heating operation.
Do not be alarmed if steam or Log appears at the outdoor unit during defi'ost mode. Water vapor from the melting ice may condense into a mist
in the cold outside air. During certain weather conditions such as heavy snow and freezing rain it is not uncommon for ice to build up on the unit
grille. This is normal for these weather conditions. Do not attempt to remove the ice from the unit grille. This condition will not affect the proper
function of the unit and will clear a few days.
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