48
C l i m a t e M a s t e r W a t e r- S o u r c e H e a t P u m p s
C L I M A T E M A S T E R W A T E R - S O U R C E H E A T P U M P S
Tr a n q u i l i t y
®
2 0 ( T S ) S e r i e s
R e v. : 0 6 / 1 7 / 1 5
White Thermistor Wire
White Thermistor Wire
Red Three-Way Valve Wire
When fl ushing/purging units equipped with ClimaDry
®
the unit should be fully fl ushed/purged before attempt-
ing to fl ush/purge the ClimaDry
®
coil. Once the unit
is fl ushed, energize the modulating three-way dehu-
midifi cation valve to allow fl ow through the ClimaDry
®
hydronic circuit.
The unit must be powered (but not operating) during
fl ushing/purging. Unit power is required to operate the
three-way modulating valve during fl ushing.
Disable the ClimaDry
®
sensor located in the supply air
stream by removing the white wire from the low voltage
terminal block (LVTB) as shown in the fi gure that follows.
Energize the modulating three-way dehumidifi cation
valve by removing the red wire from the ACC1 ‘N.O.’ ter-
minal on the DXM board. Connect this wire to the ACC1
‘NC’ terminal of the DXM controller, as shown in fi gure
1, to energize the modulating three-way dehumidifi ca-
tion valve. Once energized, the valve will take 45 – 75
seconds to fully shift. Continue fl 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 DXM 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 fl ushing/purging procedure, recon-
nect the red wire to the ACC1 ‘N.O.’ terminal on the
DXM 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 fl ush/purge cycles may be used when
required.
Flushing/Purging Wiring
Normal Unit Wiring
Red Three-Way Valve Wire
Flushing/Purging Units with ClimaDry
®
