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1. Coils: TrilliumSeries™ Adiabatic Producs have either microchannel, or tube/fin coils. The coils are
designed to be corrosion resistant, minimize refrigerant or fluid charge, allow for thermal expansion,
and be easy to inspect and clean.
2. Whisper Quiet Fan(s): The fans have integrated electronically commutated motors (ECMs).
These motors have embedded speed control and are highly efficient. They communicate with the
EcoFlex™ Controls via Modbus.
3. Pre-Cooler Pads: when saturated with water, the pads precool the air to 1-3°F above the wet
bulb temperature, thus improving the ability of the unit to reject heat on hot summer days. In
conjunction with the distribution system they are designed to keep the water off the coils. When
dry, the pads are removable for coil inspection or for cleaning.
4. Refrigerant/Fluid Connections: This is where customers connect to their piping systems. Some units
have these connections on the opposite end from the controls.
5. Discrete Spray Connection (Not Shown): Since uptime is critical, this backup connection is
available for water supply to the spray system. Should the pump or valve get damaged, or main
water supply be interrupted on a hot day, a garden hose can be connected to this connection for a
backup. See page 31 for more details.
6. Auto-Discrete Valve (Optional): This normally closed (NC) valve is located at the discrete spray
connection location. Should the pump, make-up valve, or float switch get damaged, the valve will
automatically open to supply water to the spray system.
7. Access Hatch: This door allows access to the sump, pump(s), float switch, strainer, and for general
inspection. There is no general need to climb inside the unit; reaching into the sump is all that
would be necessary during inspection and maintenance.
8. Pump(s): The industrial grade stainless steel pump(s) are controlled by the EcoFlex™ Controls to
deliver water to the distribution system when the unit is in the Pre-Cooler Mode. The pump(s) are
rated for continuous duty and can run dry for short periods without harm.
9. Pump Valve (Optional, Not Shown): This valve is a slow acting, normally open (NO) ball valve that
prevents water from discharging through the pump when the Discrete Spray Connection is used. When
the optional Auto-Discrete Backup Spray System mode is activated, the valve automatically closes.
10. Sump: This stainless steel basin collects the water from the gutters and the spray system, and
houses the pump(s). It can be accessed through the access hatch(es).
11. Strainer(s): The strainer(s) surrounds the pump(s). It protects the spray system from collecting
debris that is larger than the holes in the distribution system.
12. Float Switch (Not Shown for TSDC): The industrial grade stainless steel float switch detects the
water level in the sump, ensures that water doesn’t overflow, and, in concert with the EcoFlex™
Controls, protects the pump(s) from operating dry.
13. Make-up Valve: This normally closed (NC) valve provides fresh water to the unit to replenish the water
that evaporates into the entering air stream, and the water that is drained to keep the unit clean.
14. Make-up Pressure Balancing Valve (TSDC2 Only): This valve is adjusted to set the correct water
flow to the pre-cooler pads. This valve is preset a the factory. See page 24 for more information.
15. Water Distribution System: Water is evenly dispersed over the full length of the pad using a PVC
pipe system (TSDC) or a stainless steel gutter system (TSDC2 and TSDF2).
16. Water Collection Gutter: The unused water from the pre-cooling pads is collected in this gutter and
returned to the sump to be recycled instead of dumping the water to a drain.
17. Drain Valve: This valve is a slow opening, normally open (NO) ball valve that drains water from the
unit when the unit cycles into Dry Mode or during periodic cleaning cycles.
18. Outdoor Air Sensor (Not Shown): This sensor determines the outside temperature, and when
comparing it to the precool set temperature helps the controller determine whether the unit should
be in Dry Mode or Pre-Cooler Mode.
19. EcoFlex™ Controls: Each unit is shipped with custom controls logic that reduces energy
consumption and optimizes water usage. With preset controls, the system is programmed and ready
to operate upon arrival from the factory. For more information, see pages 28, 33 and 40.
20. Flow Meter(s) with Valve (TSDC2 and TSDF2 Only): This is set from the factory to control the flow
of water over the Pre-Cooler Pads. See page 24 for adjustment.
21. Easy Pad Removal (Not Shown) (TSDC2 and TSDF2 Only): Steel partitions facilitate pad removal
without damage while minimizing downtime. See page 36 for more information.
Unit Description
Unit Overview
Detail A, TSDC Shown
Detail B. TSDC2 Shown
NOTE: For transcritical CO
2
operation, the coil operates
with vapor in and vapor out. For
subcritical CO
2
operation, the coil
operates with subcritical vapor in
and liquid out.
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