Site Preparation and Installation

Figure 23 System piping with indoor water/glycol cooled condensing unit

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Compressor

Liquid Injection

Valve Bulb

Suction Line Male Quick

High-Pressure

Switch

Hot Gas

Bypass

Solenoid

Valve

Tube-in-Tube

Condenser

 

Connect Coupling

 

Suction Line Female Quick

*

External

Connect Coupling

 

Sensing Bulb

 

 

Equalizer

 

Liquid Injection

 

 

 

 

Valve

 

 

 

 

 

 

 

 

 

 

s

 

Tube-in-Tube

 

 

 

 

 

 

 

ypa

 

Condenser

 

 

 

 

 

 

B

 

s

 

 

 

 

 

 

 

s

 

 

 

 

 

 

 

 

 

 

a

 

 

 

 

 

 

 

 

 

G

 

 

 

 

e

 

 

 

 

t

 

 

 

 

 

 

 

 

 

o

 

 

 

 

 

 

lv

 

Water/Glycol

H

 

 

 

 

lVa

 

 

 

 

 

tro

 

 

 

 

 

 

 

 

 

n

 

 

 

 

 

 

 

 

 

 

o

 

 

 

 

 

 

 

 

Return LineWater/Glycol

C

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Fluid Return

Supply Line

 

 

 

 

 

 

 

From Unit

 

Evaporator Coil

Service Access

Shutoff **

Fluid Supply

 

Ports

 

Valves

 

To Unit

 

 

 

 

Liquid Line

 

 

 

 

Filter

*

Male Quick

 

2 - Way Water

 

Drier

Connect

 

 

 

Hose

Regulating Valve

 

 

Liquid Line

Coupling

 

 

Bibs **

 

 

 

 

Female Quick

 

 

 

 

 

 

 

 

Expansion

Connect

 

 

 

Fluid

 

Coupling

 

 

 

 

Valve

 

 

 

 

Return

 

 

 

 

 

 

From Unit

 

 

 

FIELD PIPING

 

 

 

3 - Way Water

 

 

FACTORY PIPING

 

Fluid Supply

 

 

 

To Unit

Regulating Valve

* Use Liebert sweat adapter kit with field

 

 

(Optional)

 

 

 

hard piping. Close-coupling option available with MCD.

DPN000214

** Components are not supplied by Liebert but are

 

recommended for proper circuit operation and maintenance.

Rev. 1

 

5.8Optional Equipment Piping

5.8.1Free-Cooling Coil

The free-cooling coil is a secondary coil located downstream of the DX coil. The free-coiling coil does not operate at the same time as the DX coil. A temperature sensor is factory-mounted to the free- cooling piping. If the water temperature is less than the set temperature (usually 45°F [7.2°C]), the 3- way valve opens to allow chilled water flow to the free-cooling coil and the compressor is locked off. If the water temperature is above the set temperature, the 3-way valve closes (bypasses) and enables the compressor. To keep deposits from building up in the free-cooling coil, an adjustable timer is factory-set to flush every 400 minutes.

NOTE

If the free-cooling coil is piped to an open water tower, a CU/NI (copper-nickel) type coil must be ordered to prevent corrosion of the copper tubes; or a heat exchanger must separate the tower water from the free-cooling loop.

On water-cooled systems, the free-cooling coil outlet can be field piped to the condensing unit inlet, provided a 3-way regulating valve has been installed within the water/glycol condensing unit (see Figure 24).

Liebert® Mini-Mate2

36

Page 42
Image 42
Emerson MINI-MATE2 user manual DPN000214

MINI-MATE2 specifications

The Emerson MINI-MATE2 is a cutting-edge temperature and pressure monitoring device specifically designed for the needs of the refrigeration and HVAC industries. Known for its reliability and user-friendly interface, this compact unit serves as a key tool for technicians and facility managers looking to optimize system performance while ensuring compliance with safety standards.

One of the main features of the MINI-MATE2 is its advanced digital display, which allows users to easily monitor and interpret temperature and pressure readings in real-time. Its highly responsive sensors ensure accurate data collection, vital for maintaining optimal operating conditions. Moreover, the device supports a wide range of refrigerants, making it versatile for different applications, from walk-in coolers to commercial refrigeration systems.

The MINI-MATE2 utilizes state-of-the-art technology to enhance efficiency and performance. Equipped with Bluetooth connectivity, it allows for wireless communication with mobile devices, enabling technicians to track readings and receive alerts remotely. This feature not only improves convenience but also helps in quick decision-making, ensuring timely interventions when anomalies are detected.

Another significant characteristic is its robust construction. Built to withstand harsh environments, the MINI-MATE2 features a durable casing that protects it from physical impacts and environmental factors. This resilience ensures longevity, making it a cost-effective investment for any facility.

In addition, the MINI-MATE2 is designed with user-friendliness in mind. Its intuitive interface means that even technicians with limited experience can easily navigate its functionalities. Quick setup and straightforward operation allow for rapid adoption and extensive use in a variety of settings.

Finally, the MINI-MATE2 also includes built-in data logging capabilities. Users can record historical data for analysis and reporting purposes, which is essential for performing trend analysis and identifying potential issues before they escalate. By providing a comprehensive overview of system performance, the MINI-MATE2 empowers users to make informed decisions that can lead to improved energy efficiency and reduced operational costs.

Overall, the Emerson MINI-MATE2 is an indispensable tool for modern refrigeration and HVAC applications, combining cutting-edge technology, user-friendly design, and essential features to support efficient system management.