SYSTEM OPERATION
33
COOLING MODE:
LOW STAGE COOLING MODE SEQUENCE:
·
On a call for lo cool, the Ylo and G thermostat con-
tacts close signaling the control module.
· The LED will display a “GREEN”1 flash
·
The compressor and condenser fan are energized. The
compressor is connected to the Ylo terminal of the
control module.
·
The circulator fan is energized at lo cool speed after a
cool on delay. The electronic air cleaner will also be
energized.
· After the thermostat is satisfied, the compressor is
de-energized
·
Following the 60 second Cool Mode Fan Off Delay
period, the cool circulator and air cleaner relay are
de-energized.
·
When the call for “Ylo”and “G”are presented simulta-
neously, the control will honor the Cool On delay and
keep the circulator de-energized. After the Cool On
delay, the circulator fan and air cleaner relays are
energized. The circulator fan is energized at the cool
speed. If a call for “G”is present prior to a call for “Ylo”,
the circulator will remain at the FAN circulator speed
during the Cool On delay.
SINGLE COOLING STAGE THERMOSTAT OR 2ND
STAGE COOLING MODE SEQUENCE.
· On a call for cool, the Y and G thermostat contacts
close signaling the control module.
· The LED will display a “GREEN”2 flash
·
The compressor and condenser fan are energized. The
compressor is connected to the Y terminal of the con-
trol module.
·
The circulator fan is energized at cool speed after a
cool on delay. The electronic air cleaner will also be
energized.
· After the thermostat is satisfied, the compressor is
de-energized and the Cool Mode FanOff Delay period
begins.
·
Following the 60 second Cool Mode Fan Off Delay
period, the cool circulator and air cleaner relay are
de-energized
MANUAL FAN ON:
·
On a call for Fan, the G thermostat contacts close
signaling the control module.
· The LED will display a solid “GREEN”
·
When a call for G is received, the control will energize
the circulator in low heat speed after the fan on delay
time expires. The electronic air cleaner will also be
energized at this time.
·
When the thermostat fan switch is moved to the ON
position, the circulator blower is energized at low heat
speed and the electronic air cleaner is also energized
·
When the thermostat fan switch is moved back to the
AUTO position, the circulator fan and air cleaner relay
are de-energized and the control awaits a thermostat
call for heat or cool.
·
Exception: During the Cool “On”delay, the control will
not respond to the fan input. If the fan was called prior
to the call for cool, the circulator will remain ener-
gized during the Cool “On”delay.
·
If the fan is called prior to a call for heat, the circulator
will remain energized during the entire call for heat
sequence.
