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32 CGWF-SVX01A-EN

Installation Mechanical

Evaporator Water Piping

Evaporator Water Connections.

Internal NPTF water inlet and outlet connections are used on all 20 through 50 ton

CGWF and 20-60 ton CCAF units. 60 ton CGWF use grooved pipe connectors for

water inlet and outlet. Evaporator water inlet and outlet types, sizes and locations are

shown in Figure 14.

Evaporator Piping Components

Figure 14 illustrates typical recommended evaporator piping components. Piping

components and layout vary, depending on water source and connection locations. A

vent is located on top of the evaporator at the water outlet end. Provide additional

vents at high points in the piping to bleed air from the chilled water system. Install

pressure gauge(s) to monitor entering and leaving chilled water pressure.

CAUTION

Excessive Water Pressure!

To prevent evaporator damage, do not exceed 300 psi for 20-60 ton CCAF

and 20-50 ton CGWF, and 215 psi for 60 ton CGWF evaporator water

pressure.

Provide shutoff valves in the line(s) to the gauge(s) to isolate the gauges when not in

use. Use pipe unions to simplify disassembly for system service. Use vibration

eliminators to prevent transmitting vibrations through the water lines.

Install thermometers in the lines to monitor evaporator entering and leaving water

temperatures. Install a balancing cock in the leaving water line. It will be used to

establish a balanced water flow. Both the entering and leaving water lines should

have shutoff valves installed to isolate the evaporator for service.

Flow Sensing Devices

Chilled water flow switches are optional, but there must be a chilled water flow

interlock provided to the MP to indicate that the evaporator pump is running. To

provide additional chiller protection, install and wire the flow switch in series with the

chilled water pump interlock for the chilled water circuits (refer to “Chilled Water Flow

Interlock”). Specific connection and schematic wiring diagrams shipped with the unit.

Figure 14 Recommended Piping

Trane CCAF User Manual

Other manuals for Trane CCAF