ClimateMaster Tranquility 30 Digital TE Series Installation, Operation & Maintenance Instructions Manual page 15

Figure 15b: Valve Position B - Unit Fill / Flush
Out
Front of Unit
Valve Position
Unit Fill
Unit fill valves should be switched to Position B while flush
cart is pumping to fill the unit heat exchanger (see Figure
15b). The valves position should be maintained until water is
consistently returned into the flush reservoir.
Loop Flush
Switch to valve Position A. The supply water may be shut off
and the flush cart turned on to begin flushing. Once the flush
reservoir is full, do not allow the water level in the flush cart
tank to drop below the pump inlet line or air can be pumped
back out to the earth loop. Try to maintain a fluid level in the
tank above the return tee so that air can not be continuously
mixed back into the fluid. Surges of 50 psi [345 kPa] can
be used to help purge air pockets by simply shutting off the
flush cart return valve going into the flush cart reservoir.
This process 'dead heads' the pump to 50 psi [345 kPa]. To
dead head the pump until maximum pumping pressure is
reached, open the valve back up and a pressure surge will
be sent through the loop to help purge air pockets from the
piping system. Notice the drop in fluid level in the flush cart
tank. If all air is purged from the system, the level will drop
only 3/8" in a 10" [25.4 cm] diameter PVC flush tank (about
a half gallon [1.9 liters]) since liquids are incompressible. If
the level drops more than this level, flushing should continue
since air is still being compressed in the loop fluid. Do this a
number of times.
Tranquility
Valve Position
In
c l i m a t e m a s t e r . c o m
30 Digital ( TE) Series IOM - 60Hz HFC-410A
®
NOTICE: Actual flushing time require will vary for each
installation due to piping length, configuration, and flush
cart pump capacity. 3/8" or less fluid level drop is the ONLY
indication that flushing is complete.
Switch valves to Position B to flush the unit. Flush through
the unit until all air pockets have been removed.
Move valves to position C. By switching both valves to this
position, water will flow through the loop and the unit heat
exchanger. Finally, the dead head test should be checked
Loop
again for an indication of air in the loop. Fluid level drop is
your only indication of air in the loop.
Figure 15c: Valve Position C - Full Flush
Add Antifreeze
Now if Needed
Dead Head
Pump Test
for Air
Front of Unit
Valve Position
Pressurize and Operate
As shown in Figure 15d, close the flush cart return valve to
pressurize the loop to at least 50 psi [345 kPa], not to exceed
75 psi [517 kPa]. Open the isolation valve to the expansion
tank and bleed air from the expansion tank piping using the
schraeder valve located in front of the expansion tank. This
will allow loop pressure to compress the expansion tank
bladder, thus charging the expansion tank with liquid. After
pressurizing, close the flush cart supply valve to isolate the
flush cart. Move the Flow Controller valves to Position D.
R e v . : O c t o b e r 5 , 2 0 2 1
Flushing the Earth Loop
Valve Position
Out
In
Loop
15