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Each terminal
of
the
CT8611
controls a different heat pump
function. Here
is
a listing of the possible heat pump functions:
Function Definition
1"
STAGE HEAT
When this terminal
is
activated, the
heat pump is on and providing heating
to
the living space.
When this terminal
is
activiated, the
auxiliary heating source is on because
the heat pump is unable to meet the
heating demand
of
the living space.
When this terminal
is
activated, the
heat pump is on and providing
cooling to the living space.
When this terminal is activated, the
heat pump
is
on and providing either
heating or cooling to the living space,
depending on the system switch
position.
Heating Changeover Valve. This
terminal is activated when the
system switch is in the HEAT position.
It provides changeover in heat pumps
that changeover in heating.
Cooling Changeover Valve. This
terminal is activated when the
system switch is in the COOL position.
It
provides changeover in heat pumps
that changeover in cooling.
Emergency Heat. This terminal
is
activated when the system switch is
in the
EM.
HT position. In this situation
the heat pump will not be activated.
AUXILIARY HEAT
Is'
STAGE
COOL
COMPRESSOR:
C/O VALVE HEAT
C/O
VALVE COOL:
EM. HEAT:
FAN:
When this terminal is activated, the
fan is on. With the fan switch in the
AUTO position, the fan cycles on and
off
with the heat pump. With the fan
switch in the
ON
position, the fan is
on continuously.
This terminal
is
activated when
additional auxiliary heat loads are
required. Since the CT8611 only has
provisions for one auxiliary heat load,
these loads must be connected to the
AUXILIARY HEAT terminal.
OUTDOOR
SENSOR:
This terminal is not connected to the
CT8611. On your original thermostat,
this terminal was activated by an
outdoor sensor that controlled the
auxiliary heat source.
Outdoor Thermostat. This terminal is
activated when the system switch is in
the EM. HT. position. The outdoor
thermostat controls the amount
of
auxiliary heat that will be activated.
This terminal connects to the power
side of the 24-volt transformer.
This terminal connects to the common
side
of
the 24-volt transformer.
Some heat pumps have the ability to
indicate when the heat pump is
malfunctioning. When this occurs, this
terminal is activated and the CHECK
LED
is activated.
MULTIPLE
AUX. HEAT
LOADS:
OUTDOOR
STAT
POWER:
COMMON:
SYSTEM MONITOR:
8
9