Download Print this page

Lennox XP14 Elite Series Installation Instructions Manual page 25

Xp14 elite series heat pumps
Hide thumbs Also See for XP14 Elite Series:

Advertisement

HEAT PUMP OPERATION
Your new Lennox heat pump has several characteristics
that you should be aware of:
Heat pumps satisfy heating demand by delivering
large amounts of warm air into the living space, This
is quite different from gas- or oil-fired furnaces or an
electric
furnace
which
deliver
lower
volumes
of
considerably hotter air to heat the space,
Do not be alarmed if you notice frost on the outdoor coil
in the winter months. Frost develops on the outdoor
coil during the heating cycle when temperatures are
below 45°F (7°C). An electronic control activates a
defrost cycle lasting 5 to 15 minutes at preset intervals
to clear the outdoor coil of the frost,
During the defrost cycle, you may notice steam rising
from the outdoor unit. This is a normal occurrence. The
thermostat
may engage auxiliary
heat during the
defrost cycle to satisfy a heating demand: however,
the
unit will
return
to normal
operation
at the
conclusion of the defrost cycle,
In case of extended
power
outage...
The heat pump is equipped with a compressor crankcase
heater which protects the compressor
from refrigerant
slugging during cold weather operation,
If power to your unit has been interrupted for several hours
or more,
set the
room
thermostat
selector
to
the
Emergency Heat setting to obtain temporary heat without
the risk of serious damage to the heat pump,
tn Emergency Heat mode, all heating demand is satisfied
by auxiliary heat; heat pump operation is locked out. After a
six-hour
compressor
crankcase
warm-up
period,
the
thermostat can be switched to the Heat setting and normal
heat pump operation may resume,
THERMOSTAT
OPERATIONS
Though your thermostat
may vary somewhat from the
description below, its operation will be similar.
Temperature
Setting Levers
Most
heat pump
thermostats
have two temperature
selector levers: one for heating and one for cooling. Set the
levers or dials to the desired temperature setpoints for both
heating
and
cooling.
Avoid
frequent
temperature
adjustment;
turning
the unit off and back on before
pressures equalize puts stress on the unit compressor.
Fan Switch
In AUTO or INT (intermittent) mode, the blower operates
only when the thermostat calls for heating or cooling. This
mode is generally preferred when humidity control is a
priority. The ON or CONT mode provides continuous
indoor
blower
operation,
regardless
of whether
the
compressor or auxiliary heat are operating. This mode is
required when constant air circulation or filtering is desired,
System Switch
Set the system
switch
for heating,
cooling
or auto
operation,
The auto mode allows the heat pump to
automatically switch from heating mode to cooling mode to
maintain
predetermined
comfort
settings,
Many heat
pump thermostats are also equipped with an emergency
heat mode which locks out heat pump operation
and
provides temporary heat supplied by the auxiliary heat,
Indicating
Light
Most heat pump thermostats have an amber light which
indicates
when
the heat
pump
is operating
in the
emergency heat mode,
Temperature
Indicator
The temperature
indicator
displays
the actual
room
temperature,
Programmable
Thermostats
Your
Lennox
system
may
be
controlled
by
a
programmable thermostat. These thermostats provide the
added feature of programmable time-of-day setpoints for
both heating and cooling, Refer to the user's information
manual
provided
with your
particular
thermostat
for
operation details.
Preservice Check
If your system fails to operate, check the following before
calling for service:
Check to see that all electrical disconnect switches are
ON.
Make sure the room thermostat temperature selector
is properly set.
Make sure the room thermostat
system switch is
properly set.
Replace any blown fuses, or reset circuit breakers.
Make sure unit access panels are in place.
Make sure air filter is clean,
Identify the unit model number before calling,
OPTIONAL
ACCESSORIES
Refer
to
the
Engineering
Handbook
for
optional
accessories that may apply to this unit, The following may
or may not apply:
Loss of charge kit
High pressure switch kit
Mild weather kit
Compressor monitor
Compressor crankcase heater
Mounting bases
Timed off control
Stand-off kit
Sound cover
Low ambient kit
Monitor kit
SignatureStat'"
room thermostat
Page 25
XP14 SERIES

Advertisement

loading