BAC Trillium Series - Installation; Refrigerant Connection and Fluid Connections

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11
TRILLIUMSERIES™ ADIABATIC PRODUCT
Installation
3
Refrigerant Connection and Fluid Connections
The Pre-Cooler Pads represents the only potential flammable component of the
TrilliumSeries™ Adiabatic Product. Remove the first two Pre-Cooler Pads on each side
of the unit closest to the coil connection end on each side prior to brazing or welding the
refrigerant or fluid piping.
For TrilliumSeries™ Condenser units, each unit must be piped with a trapped drop leg as
shown in Figure 12. To ensure the unit operates with full capacity ensure that the drop
leg is tall enough so the column of liquid has a static pressure greater than the pressure
drop through the coil. This will be particularly important on multi-unit installations. Typical
pressure drops through microchannel coils for TSDC are 5-6 psi for HFCs and 2 psi for
NH
3
, which correspond to ~10 foot drop leg heights, although this will vary with unit sizing
and application. For TSDC HFC’s in tube/fin coils the typical pressure drop is ~ 2 psi. For
TSDC CO
2
coils, the pressure drop is 4-12 psi. For TSDC2 the maximum allowed pressure
drops is 12 psi for water, 10 psi for CO
2
, 1 psi for NH
3
and 3 psi for HFCs. Contact BAC
for special selections that may fall outside of these parameters.
NOTICE:
1. Weld/braze the pipes with care,
noting that the coil itself may
be aluminum. Protect the PVC
piping and any exposed wiring
from weld splatter.
2. Vacuum and clean all
copper dust.
3. When piping the refrigerant
connections, take care not to
block the door opening of the
access hatch or control panel.
4. For units equipped with
threaded connections, be sure
not to apply all torque directly
to the header as this may cause
damage and leaks.
5. Connections for fluid coolers
are available in red brass MPT,
flanged, or copper sweat. Always
follow best practices when
connecting refrigerant or fluid
connections.
Figure 12. Refrigerant Connection
Equalizing Line
Compressor Discharge
Liquid to System
Receiver
Condenser
Relief Valve
Piping with Top Inlet Receiver Using Ammonia or CO2
Supply of valves and fittings beyond these points
are supplied and installed by others.
Refrigerant Ball
Valves
Field Supplied and
Installed Charge &
Purge Valves
Relief Valve
Drop Leg
Discharge Line
NOTE: If you are unable to pipe an
adequate drop leg, the discharge
line can be piped to the bottom of
the receiver.