Fig. 2--Typical Installation
FROM
POWER -____
SOURCE
®
A99212
Fig. 3--Payne Non-Porgrammable Thermostat
B, Cooling Mode
When operating in cooling mode, your heat pump will run in cooling mode until tile indoor temperature is lowered to the level you have selected.
On extremely hot days, your heat pump will run Rw longer periods at a time and have shorter "oil" periods than on moderate days.
The I_)llowing are typical conditions that add extra heat and/or humidity to your home. Your heat pump will work longer to keep your home
comli_wtable under these conditions:
l. 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 _lle home
C. Heating Mode
With the SYSTEM or MODE control of your indoor thermostat set to HEAT, your heat pump will run ill beating mode until roonl telnperature
is raised to the level you have selected. Of course, your heat pnmp will have to operate Ik)rlonger periods to maintain a comlkwtable environment
on cooler days and nights than on moderate ones.
D. Supplemental Heat
Your beat pump is your primary beating source. Your system may also be equipped with a supplemental beating 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 comli}rt you have selected.
When your heat pump needs additional beat to keep you cnmliwtable, your Carrier electronic thermostat will turn on the supplemental heat (if
equipped) and will display the "AUX HT" message.
E. Defrost Mode
When your bea_ pun-lp is providing beat to your borne and the outdoor temperature drops below 45"F, moisture may begin to fi'eeze on the snrface
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 defi'ost 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. Defi'ost will start at the preset time only if the ice is sufficient to intedi:re with normal
beating operaIion. After the ice is melted fi'om the coil, or after a maximum of 10 minutes in defi'ost mode, the unit automatically switches back
to normal beating operation.
Do not be alarmed if steam or lk}gappears at the outdoor unit during defi'nst mode. WaIer vapor from the melting ice may condense into a mist
in the cold outside air. During certain weather conditions such as heavy snow and fi'eezing rain it is not uncommon lot ice to build up on the unit
grille. This is normal Rn"these weather conditions. Do not attempt to remove the ice l)'om the unit grille. This condition will not afli:ct the proper
limction of the unit and will clear a few days.
F. Emergency Heat Mode
This allows your supplemental beating source to keep your home or office warm until your beat pump can be serviced. Also, if'the electricity to
your beat pump has been off lor more than 30 minutes, switch your thermostat to EHEAT mode beli_}rerestarting your heat pump. Leave the system
in EHEAT mode lbr an amount of time equal to the power outage. It is not necessary to exceed 12 hrs. (lf you cannot determine bow long the
power has been off, leave the system in EHEAT mode Ikw8 hrs.)
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