ClimateMaster Tranquility TR Series - Flushing;Purging Units with Climadry

76
CLIMATEMASTER WATER-SOURCE HEAT PUMPS
Tranquility
®
(TR) Series
Rev.: November 2, 2020
ClimateMaster Water-Source Heat Pumps
White Thermistor Wire
White Thermistor Wire Red Three-Way Valve Wire
When ushing/purging units equipped with ClimaDry
®
the unit should be fully ushed/purged before attempt-
ing to ush/purge the ClimaDry
®
coil. Once the unit
is ushed, energize the modulating three-way dehu-
midication valve to allow ow through the ClimaDry
®
hydronic circuit.
The unit must be powered (but not operating) during
ushing/purging. Unit power is required to operate the
three-way modulating valve during ushing.
Disable the ClimaDry
®
sensor located in the supply air
stream by removing the white wire from the low volt-
age terminal block (LVTB) as shown in the gure that fol-
lows. Energize the modulating three-way dehumidica-
tion valve by removing the red wire from the ACC1 ‘N.O.’
terminal on the DXM2 board. Connect this wire to the
ACC1 ‘NC’ terminal of the DXM2 controller, as shown in
gure 1, to energize the modulating three-way dehumidi-
cation valve. Once energized, the valve will take 45 – 75
seconds to fully shift. Continue ushing during this time.
After the valve has completed its shift, use the air bleed
from the top of the reheat coil to purge air from the coil.
De-energize the valve by removing the red wire from the
ACC1 ‘NC’ terminal on the DXM2 board. The valve will
spring return to its normal position in just a few seconds.
After the valve has fully returned, repeat the process of
running the valve through its cycle and purging air from
the reheat coil.
Under extreme circumstances this procedure may be
required multiple times to purge all air from the circuit.
After completing the ushing/purging procedure, recon-
nect the red wire to the ACC1 ‘N.O.’ terminal on the
DXM2 for normal operation. Reconnect the white sen-
sor wire to the LVTB, as shown below. If air is allowed
to collect in the ClimaDry
®
piping, nuisance trips may
occur. Additional ush/purge cycles may be used when
required.
Flushing/Purging Wiring
Normal Unit Wiring
Red Three-Way Valve Wire
Flushing/Purging Units with ClimaDry
®