7
2.
OVERCURRENT PROTECTION
In general, the best fuse or breaker for any air
conditioner is the smallest size that will permit
the equipment to run under normal use and
service without nuisance trips. Such a device,
sized properly, gives maximum equipment pro-
tection. The principal reason for specifying a
time delay type is to prevent nuisance trips
when the unit starts.
In the event that a fuse does blow or a breaker
trips, always determine the reason. Do not
arbitrarily put in a larger fuse or breaker and do
not, in any case, exceed the maximum size
listed on the data label of the unit.
3. HEAT-COOL THERMOSTAT OPERATION
Heat-Cool Thermostat: Your thermostat
should be located on an inside wall approxi-
mately five feet from the floor away from drafts
and doors. Do not locate lamps or other objects
near the thermostat which could affect its op-
eration or block a free flow of air.
The heat-cool thermostat is equipped with a
system HEAT-COOL switch, which provides a
positive means of preventing simultaneous
operation of the heating and cooling mode. The
thermostat is also equipped with an AUTO-ON
fan switch which allows the home owner to
operate the indoor blower when air circulation
is desired.
4. DEFROST CYCLE CONTROL
The defrost cycle is initiated via a signal from a
low pressure switch located in the outdoor side
return gas tubing. This signal indicates the coil
pressure has fallen low enough due to the build
up of frost. The defrost cycle will terminate via
a temperature switch located on the outdoor coil
after the frost has been cleared.
5. OUTDOOR THERMOSTAT
The outdoor thermostat (located at the top of the
control panel) prevents the auxiliary heat source
(gas or electric) from operating above a certain
set point. The thermostat is non-adjustable with
a factory setting of 40°F.
SYSTEM OPERATION
1.
PRE-START CHECK LIST
The following check list should be observed
prior to starting the unit.
Is the unit level? It should be level or slightly
slanted toward the drain for proper con-
densate drainage.
Is there free air flow to and from the con-
denser? A one foot clearance around the
coil, and six foot clearance above the fan?
Is the wiring correct according to the wiring
diagram and electrical codes?
Are all the wiring connections tight? Check
the condenser fan to make sure it turns
freely.
Is the thermostat wired correctly? Is it
installed in a proper location?
2.
START-UP PROCEDURE
a.
Set the system switch to the OFF position.
b.
Dial thermostat setting as high as it will go.
c.
Turn on power supply at the circuit breaker.
d.
Set the system switch to ON or COOL. Set
the temperature setting to below room
temperature. Verify that the indoor blower,
outdoor fan, and compressor are ener-
gized and the cooling function starts.
e.
Verify that the discharge air grilles are
adjusted and the system is balanced.
f.
Verify that there are no air leaks in the duct
work.
g.
Verify that the condensate drain is properly
installed and that it functions correctly.
h.
Dial the thermostat higher than room tem-
perature. The unit should stop.
i.
Set thermostat to the HEAT position. Pro-
ceed to check for correct heat pump op-
eration.
j.
If outdoor temperature is below 35° F verify
that the furnace controls and burners or
heating elements operate correctly.
k.
If outdoor temperature is above 35° F you
may jumper out the outdoor thermostat to
check for proper furnace operation.
l.
Instruct the owner on unit operation, filter
servicing, and proper thermostat opera-
tion.