ClimateMaster Tranquility TSV 009 - ECM Blower Control; Dehumidification Mode Settings

climatemaster.com
33
Tranquility
®
20 (TE) Series
Rev.: June 5, 2020
THE SMART SOLUTION FOR ENERGY EFFICIENCY
ECM Blower Control
The ECM fan is controlled by an interface board that
converts thermostat inputs and eld selectable CFM
settings to signals used by the ECM motor controller. Fan
speeds are selected with DIP switch settings. To take
full advantage of the ECM motor features, a multi-stage
thermostat should be used (2-stage heat/2-stage cool or
3-stage heat/2-stage cool).
Note: Power must be off to the unit for at least three
seconds before the ECM motor will recognize a speed
change. The motor will recognize a change in the CFM
Adjust or dehumidication mode settings while the
unit is powered.
There are four different airow settings from lowest
airow rate (speed tap 1) to the highest airow rate
(speed tap 4).
The charts below indicate settings for of the ECM
interface board, followed by detailed information for each
setting.
Cooling Settings: The cooling setting determines the
cooling (normal) CFM for all units with ECM motor.
Cooling (normal) setting is used when the unit is not in
dehumidication mode. Tap 1 is the lowest CFM setting,
while tap 4 is the highest CFM setting. To avoid air coil
freeze-up, tap 1 may not be used if the dehumidication
mode is selected. Consult submittal data or specications
catalog for the specic unit series and model to correlate
speed tap setting to airow in CFM.
Heating Settings: The heating setting determines the
heating CFM. Tap 1 is the lowest CFM setting, while
tap 4 is the highest CFM setting. Consult submittal data
or specications catalog for the specic unit series and
model to correlate speed tap setting to airow in CFM.
CFM Adjust Settings: The CFM adjust setting allows
four selections. The NORM setting is the factory default
position. The + or – settings adjust the airow by +/-
5%. The +/- settings are used to “ne tune” airow
adjustments. The TEST setting runs the ECM motor at
400 CFM/ton, example 2-ton = 800 CFM.
Dehumidication Mode Settings: The dehumidication
mode setting provides eld selection of humidity control.
When operating in the normal mode, the cooling airow
settings are determined by the cooling tap setting above.
When dehumidication is enabled there is a reduction
in airow in cooling to increase the moisture removal of
the heat pump. Consult submittal data or specications
catalog for the specic unit series and model to correlate
speed tap to airow in CFM. The dehumidication mode
can be enabled in two ways.
1. Constant Dehumidication Mode: When the
dehumidication mode is selected (via DIP switch or
jumper setting), the ECM motor will operatewith a
multiplier applied to the cooling CFM settings (approx.
20-25% lower airow). Any time the unit is running in
the cooling mode, it will operate at the lower airow
to improve latent capacity. The “DEHUM” LED will be
illuminated at all times. Heating airow is not affected
Note: Do not select dehumidication mode if cooling
setting is tap 1.
2. Automatic (Humidistat-controlled)
Dehumidication Mode: When the dehumidication
mode is selected (via DIP switch) AND a humidistat
is connected to terminal DH), the cooling airow
will only be reduced when the humidistat senses
that additional dehumidication is required. The DH
terminal is reverse logic. Therefore, a humidistat (not
dehumidistat) is required. The “DEHUM” LED will
be illuminated only when the humidistat is calling
for dehumidication mode. Heating airow is not
affected. Note: Do not select dehumidication mode
if cooling setting is tap 1.