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EMERGENCY HEAT MODE
The emergency heat (EHEAT) setting on your Carrier electron-
ic thermostat can be used to turn off your heat pump and use
only the suppleruental heating source (if equipped). The Aux-
iliary Heat Indicator (AUX HT) will be displayed while your
system is operating in EHEAT mode.
Emergency heat is not normally used. There may be situa-
tions, however, when it is necessary, such as when your heat
pump requires servicing.
If the electricity to your heat pump has been off l\_r more than
30 minutes, switch your thermostat to EHEAT mode before
restarting your heat pump. Leave the system in EHEAT mode
l\_r an amount of time equal to the power outage. It is not
necessary to exceed 12 hrs. If you cannot determine how long
the power has been off, leave the system in EHEAT mode l\_r
8 hrs.
MAIN
ON
OFF
Fig. 4wMain Electrical Disconnect
PERFORMING ROUTINE
MAINTENANCE
With the proper maintenance and care, your heat pump will
operate economically and dependably. Maimenance can be
accomplished easily by referring to the l\41owing directions.
However, bet\_re ped\_rming maintenance, consider these
important safety precautions:
Disconnect all electrical power to the indoor air han-
dler or furnace before removing access panels to per-
form any maintenance. Disconnect power to both the
indoor and outdoor units. NOTE: There may be more
than one electrical disconnect switch. Electrical
shock can cause personal injury or death.
Although special care has been taken to minimize
sharp edges in the construction of your unit, be
extremely careful when handling parts or reaching
into the unit. Failure to follow this caution could
result in minor personal injury or product and
property damage.
CHECKTHE AIR FILTER
A dirty air filter will cause excessive strain on the compressor
and blower motor. This can cause the components to over-heat
and automatically shut down. In the worst case, the compo-
nents will fail and need to be replaced. To avoid inefficient or
failed operation of your unit, CHECK THE FILTER(S)
EVERY 3 TO 4 WEEKS. Replace filter(s) when necessary, or
clean the filter(s) if you have the reusable type.
Disposable filters should be replaced by similar, new filters of
the same dimensions.
Reusable, permanent filters should be washed in a solution of
cold water and mild detergent, then rinsed and thoroughly
dried. THE FILTER MUST BE COMPLETELY DRY
BEFORE BEING REINSTALLED. To avoid prolonged shut-
down of your unit while a filter is drying, you should have an
extra filter on hand. This allows you to rotate between the 2
with minimal downtime for your coml\_rt system. Extra filters
may be purchased from your dealel:
There are no filtel.Sin the outdoor unit of a split system. If your
indoor unit is a gas or oil furnace, refer to your filrnace User's Man-
ual for filter location and procexlures for replacement or cleaning.
If your system includes an indoor tim coil unit, the filter may be
located in the unit where it connects with the return-air duct or
plenum. (See Fig. 5.) Remove the filter cover plate by sliding
latches toward center of plate. Lift filterto clear lower flange. Fil-
ter is spring-loaded and will "pop out" Reinstall filter, being cer-
tain to secure filter behind lower flange. When reinstalling cover
plate, secure plate behind upper flange then slide tabs outward.
The indoor fan coil unit may be located in the attic. In this
instance the filter may be located behind the return air grille.
Access the filter by removing the return air grille.
If your system includes a high efficiency or electronic air
cleaner, refer to air cleaner User's Manual l\_r proper filter
cleaning or replaceruent.
Fig. 5--Removing Filter from Fan Coil Unit
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