Page 23
The supply CFM can be adjusted by changing the percent
age of motor output using the Unit Controller settings Refer
to table 5 for menu paths and default settings.. Record any
RPM% changes on the parameter settings label located on
the inside of the compressor access panel.
CAUTION
The BLOWER CALIBRATION process starts the indoor
blower at operational speeds and moves the economizer
damper blades. Before starting this process, replace any
access panels and close all unit doors except com
pressor compartment door.
Blower calibration is required only on units that are newly
installed or if there is a change in the duct work or air filters
after installation. Use the mobile service app to navigate to
the SETUP>TEST & BALANCE>BLOWER menu. After
the new RPM% values are entered, select START CALI
BRATION. The blower calibration status is displayed as a
% complete. Upon successful completion, the mobile ser
vice app will display CALIBRATION SUCCESS and go
back to the blower calibration screen.
IMPORTANT - The default value for Cooling Low motor
speed is lower than a traditional singe- or two-speed unit. If
operating the unit with a 2- or 3-stage controller (2- or
3-stage thermostat, DDC controller, etc.), it is recommend
ed to increase the Cooling Low CFM default value to a suit
able level for part load cooling (typically 60% of full load
CFM).
TABLE 5
DIRECT DRIVE PARAMETER SETTINGS - 581102-01
Parameter
Field
Setting
Description
Note: Any changes to Smoke CFM setting must be adjusted before the other CFM settings. Use SETTINGS > RTU OP
TIONS > EDIT PARAMETERS = 12 for EBM, 6 for ECM
BLOWER SMOKE CFM % Percentage of RPM for blower smoke speed.
SETUP > TEST & BALANCE > BLOWER
BLOWER HEATING HIGH CFM % Percentage of RPM for blower heating high speed.
BLOWER HEATING LOW CFM % Percentage of RPM for blower heating low speed (P volt gas heat only).
BLOWER COOLING HIGH CFM % Percentage of RPM for blower cooling high speed.
BLOWER COOLING LOW CFM %
Percentage of RPM for blower cooling low speed and vent speed for stan
dard static blowers.
BLOWER VENTILATION CFM % Percentage of RPM for high static blower ventilation speed.
SETUP > TEST & BALANCE > DAMPER
BLOWER HIGH CFM DAMPER POS % % Minimum damper position for high speed blower operation. Default 0%.
BLOWER LOW CFM DAMPER POS % % Minimum damper position for low speed blower operation. Default 0%.
POWER EXHAUST DAMPER POS % % Minimum damper position for low power exhaust operation. Default 50%.
SETTINGS > RTU OPTIONS > EDIT PARAMETERS = 216
POWER EXHAUST DEADBAND % % Deadband % for power exhaust operation. Default 10%.
SETTINGS > RTU OPTIONS > EDIT PARAMETERS = 10 (Applies to Thermostat Mode ONLY)
FREE COOLING STAGE-UP DELAY sec
Number of seconds to hold blower at low speed before switching to blower
at high speed. Default 300 seconds.
Installer: Record any parameter changes under “Field Setting” column. Settings need to be recorded by installer for use when Unit Con
troller is replaced or reprogrammed.
To Next Page
Loading...
