Cooling Cycle; Heating Cycle; Defrost Cycle; Emergency Heat - Payne PH10 User's Information Manual

Depending on your typical winter heating needs, your home comfort system may include a supplementary heating source. The EMER-
GENCY HEAT mode provides for convenient selection between the two heating appliances.
In certain geographic areas and in certain applications, electric heat is not required. Any questions regarding your application should
be directed to your dealer.

COOLING CYCLE

When operating in the cooling mode, your heat pump will run until the indoor temperature is lowered to the level you have selected.
On extremely hot days, your conditioner 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 cooling 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 HEAT selected, 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.
Refer to your furnace User's Manual for specific information on heating operation.

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 outdoor 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 cycle.
The defrost cycle 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 outdoor coil, or after a maximum of 10 minutes in the defrost mode, the unit will automatically switch
back to normal heating operation.
Do not be alarmed if steam or fog appears at the outdoor unit during the defrost cycle. 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 outdoor unit
grille. This is normal for these weather conditions. Do not attempt to remove the ice from the outdoor unit grille. This condition will
not affect the proper function of the unit and will clear within a few days.

EMERGENCY HEAT

The EMERGENCY HEAT setting on your thermostat refers to any supplementary heating appliance that may be included in your
home comfort system. Operation of the EMERGENCY HEAT source may be required if heating demands exceed the capacity of
the heat pump, or if the heat pump malfunctions.
The red light on your thermostat will illuminate if the EMERGENCY HEAT switch is moved from NORMAL to the EMERGENCY
HEAT setting. This indicates that the heat pump is off and the supplemental heating appliance is selected for operation.
Also, if your particular model of heat pump includes an efficiency alarm circuit, the red light will glow if the compressor malfunctions.
Call your dealer for immediate service if you suspect trouble.
During the heating season, switch to EMERGENCY HEAT if the electricity to your outdoor unit has been off for more than 30
minutes for any reason (i.e., power outage). Leave the switch in the EMERGENCY HEAT mode for an amount of time equal to that
during which the power was off. It isn't necessary to exceed 12 hours. If you cannot determine how long the power has been off,
leave the switch in the EMERGENCY HEAT position for 8 hours.
NOTE: The EMERGENCY HEAT switch is effective only when HEAT or AUTO is selected.
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