25
2.
Download the
CoolCloud
HVAC phone application
and use it to configure and test furnace operations.
NOTE: When new versions of Bluetooth
Communication Software and Furnace Control
Software are available, the phone application
notifies the user. Software updates are classified
as either optional or mandatory and installed by
using the phone application. Install all mandatory
software updates. Review notes for optional
software updates and install if necessary.
Gas Furnace Testing
a. Two-stage operation using the
CoolCloud
HVAC
application:
a. Select the gas heat icon after entering the
furnace menus.
b. Select any value less than 50% for low stage
operation and any value greater than 50% for
high stage operation.
3.
Confirm thermostat heating call functions correctly
with equipment.
Dehumidification
Control logic allows the furnace’s circulating blower to
operate at a reduced speed during a combined thermostat
call for cooling, and a dehumidification demand. This
lower blower speed increases moisture removal as
it passes through the indoor coil. The control board
includes a 24-volt dehumidification input (DH) on the
low-voltage wiring connector. The terminal features
dual configuration functionality and can accommodate
enabling dehumidification when the input is energized
or de-energized. When using an external dehumidistat,
connect between the R and DH terminals. If the humidistat
closes on humidity rise or the thermostat energizes this
terminal when dehumidification is required, set the control
board “dHL” (Dehum Logic) menu setting to “HI” using the
pushbuttons or
CoolCloud
HVAC phone application. If the
humidistat opens on humidity rise or the thermostat de-
energizes this terminal when dehumidification is required,
set the “dHL” (Dehum Logic) menu to “Lo” using the
pushbuttons or
CoolCloud
HVAC phone application.
Auxiliary Alarm Switch
The control is equipped with a 24VAC Aux Alarm,
accommodating condensate switch installations. The
connection is designated as CONDENSATE IN/OUT on
the control board. By default, the connected AUX switch
is normally closed and opens when the water level in the
evaporator coil base pan reaches an unacceptable level.
The control responds by displaying an
EEf
error code and
turning off the outdoor condensing unit. If the AUX switch
is detected to be in the closed position for 30 seconds,
regular operation resumes and the error message is no
longer displayed.
Pushbutton Menu
LEFT
CENTER
RIGHT
Figure 39
The furnace includes three on-board pushbuttons allowing
users to navigate indoor and outdoor system menus.
The “RIGHT” and “LEFT” buttons enable the user to
scroll through the main menus and to then scroll through
available options within specific menus. The “CENTER”
button enters the main menu and then permanently selects
options within those menus.
NOTE: After scrolling to the desired option
within a menu, that option may be flashing on the
7-segment displays. This condition indicates no
selection is selected. Pressing the Center button
twice chooses the option. The first press stops
the flashing, and the second makes the selection
official and returns to the main menu.
Accessories
When installing an external humidifier, dehumidifier, or
ventilator, it may require airflow setting modification at the
HVAC system to function accordingly.
1. Make sure the installed 24VAC thermostat is capable
of controlling the accessory or accessories.
2. Connect the appropriate accessory control wires
to the accessory devices from the thermostat
(see thermostat manual for connection and setup
instructions).
3. If the thermostat is capable of providing a continuous
fan call (G signal) during accessory operation:
Make sure to connect the thermostat G terminal to the
G terminal on the indoor unit. Set up the thermostat,
ensuring the G signal energizes during accessory
operation.
4.
Select the appropriate fan only airflow for the
accessory using the indoor unit pushbutton menus or
the
CoolCloud
HVAC phone application.
5. Using the thermostat, independently test each
accessory in parallel with the continuous fan mode for
proper airflow.
