Emerson Liebert InteleCool2 User Manual

Precision Cooling
For Business-Critical Continuity

Liebert InteleCool2

User Manual - Outdoor Wall-Mount Air Conditioner,1.5 - 5 Tons, 50 & 60 Hz

™

TABLE OF CONTENTS

1.0 INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1

1.1 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

1.2 Standard Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

1.3 Optional Features. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

1.3.1 Refrigeration System Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

1.4 Ancillary Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

1.5 Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

2.0 INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4

2.1 Preparation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

2.1.1 Room Preparation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

2.1.2 Location Considerations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

2.1.3 Equipment Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

2.2 Unit Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

2.3 Piping Connections. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

2.4 Ducting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

2.5 Electrical Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

2.5.1 Power Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

2.5.2 Control Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

2.6 Outside Air Damper - Optional . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

2.7 Economizer - Optional . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

3.0 CHECKLIST FOR COMPLETE INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9

4.0 START-UP PROCEDURE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

5.0 OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

5.1 Compressorized Cooling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

5.2 Economizer Cooling - Optional . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

5.2.1 Enthalpy Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

5.2.2 Actuator. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

5.3 Heating - Optional . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

5.4 Unit Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

5.4.1 Remote Control Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

5.4.2 High Pressure (Standard) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

5.4.3 Refrigeration Control Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

5.4.4 Anti-Short Cycle Timer - Standard . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

5.4.5 Heater Protection - With Optional Heat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

5.4.6 Lockout Relay - Optional . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

5.4.7 Common Alarm - Optional . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

6.0 MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15

6.1 Filters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

6.2 Blower Package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

6.3 Economizer - Optional . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

6.4 Heat. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

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6.5 Refrigeration System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

6.5.1 Refrigerant Lines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

6.5.2 Discharge Pressure. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

6.5.3 Thermostatic Expansion Valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

6.5.4 Air-Cooled Condenser. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

6.6 Compressor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

6.6.1 Compressor Replacement. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

7.0 SPECIFICATIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19

7.1 Dimensional Data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

7.2 Technical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

8.0 TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27

9.0 MAINTENANCE INSPECTION CHECKLIST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

10.0 PARTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .29

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FIGURES

Figure i Model number designation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . iv

Figure 1 Unit mounting dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Figure 2 Low volt wiring terminals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Figure 3 Mounting minimum position potentiometer on actuator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Figure 4 Refrigeration system. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Figure 5 Enthalpy control setting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Figure 6 Dimensional data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Figure 7 Condenser/piping assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

Figure 8 Crankcase heater (reciprocating compressor only) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

Figure 9 Evaporator blower. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

Figure 10 Evaporator coil and expansion valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

Figure 11 Electric panels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43

Figure 12 Heater assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

Figure 13 Economizer assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

Figure 14 Common alarm assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

Figure 15 Soft start device. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46

TABLES

Table 1 Mounting dimensional data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Table 2 Operating modes/contact closures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Table 3 Recommended applications for control options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Table 4 Pressure information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Table 5 InteleCool2 dimensional data in. (mm) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Table 6 Technical data, 60 Hz . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Table 7 Technical data, 60 Hz, continued . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

Table 8 Technical data, 50 Hz . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

Table 9 Technical data, 50 Hz, continued . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

Table 10 Optional heater capacity, 60 Hz . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

Table 11 Optional heater capacity, 50 Hz . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

Table 12 Electrical data, 60 Hz - amps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

Table 13 Electrical data, 50 Hz - amps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

Table 14 Troubleshooting guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

Table 15 Refrigeration system parts, 1.5 and 2 ton units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

Table 16 Refrigeration system parts, 3 ton units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

Table 17 Refrigeration system parts, 4-ton units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

Table 18 Refrigeration system parts, 5-ton units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

Table 19 Electric panel, 1.5- and 2-ton units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

Table 20 Electric panel parts, 3-ton units. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

Table 21 Electric panel parts, 4-ton unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

Table 22 Electric panel parts, 5-ton unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

Table 23 Motor parts, heater, Economizer, 1.5- and 2-ton units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

Table 24 Motor parts, heater, Economizer, 3-ton units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

Table 25 Motor parts, heater, Economizer, 4-ton units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

Table 26 Motor parts, heater, Economizer, 5-ton units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

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Figure i Model number designation

External Telecommunication

0=Standard Supply & Return

Openings

3=4 or 5 Ton Unit With 3 Ton

Supply & Return Openings

ET 0 36 H R P F B T

Nominal Btuhs (1000)

H = Hermetic Compressor
S = Scroll Compressor

R = Right Compressor
L = Left Compressor

P = 208/230V – 1 ph - 60 hz
S = 220/240 – 1 ph - 60 hz
A = 460V – 3 ph - 60 hz
Y = 208/230V – 3 ph - 60 hz
N = 200/230 – 3 ph - 50 hz
M = 380/415V – 3ph - 50 hz

0 = Standard
F = Fixed Outside Air Damper
E = Economizer

0 = No Heat
A = 5 kW Heat
B = 10 kW Heat
C = 15 kW Heat

T = Tan, Painted Steel Panels
C = Custom Color, Painted Steel Panels
A = Aluminum Panels

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1.0 INTRODUCTION

1.1 General

The Liebert InteleCool®2 Environmental Control System was designed for convenience and dependabil­ity in unmanned and remote locations typical of the telecommunications industry. Ease of installation,
operation and service coupled with the use of high quality, high reliability components make InteleCool2
ideally suited for maintaining an environment for sensitive electronic equipment. Standard units are
NRTL-C listed/certified to meet U.S. and Canadian safety standards, and MEA listed for New York City
applications. These agency listings insure fast, hassle-free inspection and building code approvals.

Self-Contained

The InteleCool2 product is completely self-contained. All components are enclosed in the weather­proof cabinet.

Space Savings

The InteleCool2 does not use any of the valuable floor space inside the secure space. Instead, it is
mounted on the outside wall. No additional space is required outside or on a roof.

Easy to Install

The InteleCool2 is assembled, wired, piped, charged with refrigerant, and fully factory tested as a sys­tem to ensure trouble free installation and start-up.

1.2 Standard Features

Reciprocating Hermetic Compressor—1.5, 2 and 3 Ton Units

The heart of the refrigeration system is a reciprocating hermetic compressor. The compressor features
a suction gas cooled motor, internal centrifugal oil pump, vibration isolating mountings, internal
thermal overloads, and crankcase heater.

Scroll Compressor—4 and 5 Ton Units

The quiet and efficient scroll compressor features a suction gas cooled motor, internal centrifugal oil
pump, vibration isolating mountings and internal thermal overloads.

Refrigeration System

The refrigeration circuit includes a liquid line filter drier, an externally equalized expansion valve,
and a high-pressure switch.

Evaporator Coil

The evaporator coil is constructed of mechanically expanded copper tubes in enhanced surface alumi­num fins. A coated, galvanized steel condensate drain pan is provided.

Condenser Coil

The air-cooled condenser coil is constructed of mechanically expanded copper tubes in enhanced sur­face aluminum fins. Components rated for up to 115°F (46°C) ambient.

Evaporator Blower

Evaporator air is supplied by a direct drive blower package. Fans are centrifugal, double width, dou­ble inlet.

Filter

The filter is 2 inches deep, pleated, with a minimum efficiency rating of 20% (based on ASHRAE stan­dard 52.1). Located within the cabinet, the filter is serviceable from the front of the unit.

Cabinet

The exterior cabinet is constructed of painted steel. Internal structural parts (including base) are hot
dipped galvanized steel. The evaporator compartment is insulated with 1/2" thick, 2 lb. density, neo­prene-faced, fiberglass insulation.

Control Interface

The unit is supplied with customary HVAC wiring designations (R, G, W, Y) inside the low voltage
partition of the unit electric box. The control interface can be provided by sources ranging from a wall
mounted thermostat, a Liebert control and monitoring system or a third party building management
control.

Introduction

1

1.3 Optional Features

4 or 5 Ton Unit With 3 Ton Openings

The 4 or 5 ton units with 3 ton supply and return openings are designed to replace 3 ton wall mounted
air conditioners using existing wall openings. The economizer/fresh air option is not available. Return
filter is located in the return air grille and must be selected from accessory equipment.

Scroll Compressor—Optional on 1.5, 2 and 3 Ton Units

The quiet and efficient scroll compressor features a suction gas cooled motor, internal centrifugal oil
pump, vibration isolating mountings and internal thermal overloads.

Compressor Location

The standard compressor location is on the right when viewing the unit when it is mounted on the
wall. The optional compressor location is on the left, to improve serviceability of the compressor when
the unit is installed as one unit of a pair.

Compressor Crankcase Heater

An optional compressor crankcase heater is available for use with the scroll compressor but is not
required because the refrigerant charge of the InteleCool2 unit with scroll compressor is less than the
compressor critical charge.

High Ambient Condenser

This option is provided for applications where the ambient temperature exceeds the normal design
capabilities of the units. It consists of a condenser motor and fan blades which are sized to provide
additional airflow across the condenser coil. Designed for applications up to 125°F (51°C) ambient.

Introduction

Heat

Heat is provided in a single stage from an open wire electric resistance element. Heating capacity
options available are 5 kW, 10 kW, and 15 kW depending on unit model size.

Economizer

The Economizer allows outside air to be introduced to the space through the evaporator filter when
conditions are favorable for Economizer cooling. It contains a modulating damper, spring return
direct drive actuator, enthalpy control for switchover, outside air hood and a mixed air controller set
at 55°F (12.8°C). Mechanical cooling and Economizer operation do not operate simultaneously.

Fresh Air Damper

Allows outside air to be brought in to meet indoor air requirements. Air is drawn in through the evap­orator filter. The amount of air to be introduced to the space is field selectable.

Panel Colors

Optional color choices for the steel panels are almond (light tan, the color option for the original
InteleCool), desert brown, or bright white.

Lockout Relay

The lockout relay latches the detection of a high-pressure condition in the refrigeration circuit and
prohibits operation of the compressor until the abnormal pressure conditions are acknowledged. The
lockout relay is reset by cycling the unit main power or by changing the setpoint on the thermostat to
temporarily eliminate a call for cooling. A normally open set of contacts is provided to terminals 2 and
3 of the customer terminal strip for monitoring the status of the lock out relay when this option is sup­plied without the Common Alarm option.

Common Alarm

The common alarm provides the necessary components to detect high pressure, low pressure, high
temperature, or loss of indoor airflow, and to provide a customer signal via a contact closure. To detect
low pressure, the optional low pressure switch with bypass, T-pack1 or T-pack2 must also be selected.

Soft Start

Provides a PTC resistor to assist the start of the compressor motor in low voltage operation. Available
only on single phase units.

2

1.3.1 Refrigeration System Options

Low Pressure Switch and Low Pressure Bypass Timer

Low Pressure Switch: Used to protect the InteleCool2 if the evaporator blower fails, the air filter
becomes clogged, the refrigeration circuit malfunctions or if there is loss of refrigerant. The low pres­sure switch is activated when the suction pressure drops below its cutout setting. When activated, the
low pressure switch inhibits operation of the compressor and condenser fan. The switch will automat­ically reset once the system pressure rises above its cut-in setting.

Low Pressure Bypass Timer: Also known as the Condenser Low Ambient Control or Winter Start
Option), the low pressure switch is used when starting the system when the outdoor temperature is
low. A few minutes after start-up, the low pressure switch resumes normal operation. This option can
be used for applications down to 50°F (10°C). For control down to -20°F (-28.9°C), use the T-pack1 or
T-pack2.

T-pack1

This option provides a Low Pressure Switch, a Low Pressure Bypass Timer (described above), and a
Fan Cycle Control. This option package is one of the preferred control packages for telecommunica­tion industry applications.

The Fan Cycle Control, also known as the Condenser Fan Cycling Control, consists of a reverse-acting
pressure switch. When the outdoor temperature is low, the pressure switch cycles the condenser fan
to maintain discharge pressures that will allow the systems to function. It is to be used when the out­door ambient temperature is lower than 50°F (10°C) down to -20°F (-28.9°C).

T-pack2

This option includes a Low Pressure Switch, a Low Pressure Bypass Timer (described above), and an
adjustable Fan Cycle Control, which acts as described in the preceding paragraph, except that it is
adjustable. This option package is one of the preferred control packages for telecommunication indus­try applications.

Introduction

1.4 Ancillary Components

Wall-Mounted Thermostat

The thermostat provides for heating/cooling application with separate fan control. Supplied with a
thermostat sub-base.

Indoor Supply/Return Grilles

The supply grille is an aluminum louvered, double deflection type grille allowing user adjustment of
direction of air distribution. The return grille is an aluminum louvered, fixed, single-deflection style
grille.

Additional Spare Filters

Additional sets of the 20% efficiency rated filters (efficiency based on ASHRAE standard 52-1) may be
selected.

1.5 Accessories

Dual Unit Control

The hinged cover dual unit control (DUC) has a two-stage heat/cool thermostat with individual heat­ing and cooling setpoints, adjustable interstage differentials, and bimetallic elements. The control
features a solid state timer with 1-2-4-8 day sequence. Unit lead selector, unit 1 & 2 power-on LEDs,
unit 1 or 2 lead unit LEDs, 48 hour program save on loss of power, industry standard connections and
24V power from each unit. The DUC provides auto sequencing and displays on-status and operating­status parameters.

Tele2 C ontro l

This microprocessor-based controller controls two InteleCool2 units. The unit has a 10-key keypad,
four-row by 20-column LCD, an RS-232 modem port, and an RS-232 terminal port. It allows up to
eight customer-selectable, isolated normally open, dry contact alarm inputs. The Tele2 control
requires either a THS28-30 or a THS28-60 sensor assembly. Models are available for
120/50-60/1 VAC, 230/50-60/1 VAC or 48 VDC power.

3

2.0 INSTALLATION

2.1 Preparation

2.1.1 Room Preparation

The room should be well-insulated and should be sealed to reduce airborne contaminants from pene­trating the site. Outside air may be introduced through the damper option or be used for economized
cooling by using the Economizer option. However, uncontrolled outside air should be kept to a mini­mum. Outside air adds to the cooling, heating, and filtration loads of the site. Doors should be prop­erly sealed to minimize leaks and should not contain grilles.

2.1.2 Location Considerations

The InteleCool2 unit is field-mounted on an outside wall. Additional framing in the wall may be
required to ensure adequate structural support.

The outdoor area near the condenser supply and discharge must also be considered. To assure ade­quate air supply, the unit should be mounted in a clean area, away from loose dirt and foreign matter
that may clog the condenser coil. The unit should not be located near steam, hot air, or fume exhausts.
Also, the unit should not be mounted closer than 12 feet (3.7 m) from an opposing wall, obstruction or
unit. For service clearance, provide 36 inches (914 mm) in front of the unit, and 30 inches (762 mm) on
each side. When mounting units side by side, provide a minimum of 36 inches (914 mm) between adja­cent units unless the adjacent units will not be run at the same time. In this case, the units may be
placed as close as 18 inches (457 mm) apart. However, this will make the units more difficult to service.
In such situations, consider the compressor location option for improved serviceability. Before mount­ing units, check local codes for applicable clearances.

2.1.3 Equipment Inspection

Upon delivery of the unit, inspect all items for visible damage. Concealed damage may be discovered
later during installation. Report any damage to the shipper immediately and file a damage claim.
Also, forward a copy of the damage claim to your Liebert supplier.

Installation

2.2 Unit Installation

The InteleCool2 unit is installed against, and through, an outside wall. Two (2) openings in the wall
are required for the evaporator supply and return. Provide 1/2" clearance on wall openings for supply
and return air. Install the unit in a level position to assure proper refrigerant flow, oil return, and
condensate drain. To install the unit, follow the instructions below.

1. Verify that an adequate structural support is provided for the unit.

2. Using a chalk line, mark the outside wall with a level horizontal line, where the bottom of the unit
is to rest.

3. Prepare supply and return openings in an outside wall, measuring up from the chalk base line.

4. Prepare mounting holes. The mounting holes may be pilot holes for lag screws or clearance holes
for bolts that will extend completely through the wall. Refer to Figure 1 for the location of these
holes.

5. Fasten the unit mounting base angle to the outside wall with six 5/16" bolts or lag screws (not
supplied), just below chalk line and centered on the opening in the wall.

WARNING

!

Use caution and adequate equipment to safely handle unit. Weight of each unit ranges
from 330 to 490 lbs. (150 to 222 kg), depending on model.

6. With the unit front panel removed, lift the unit onto the base angle, making certain that the rear
unit angle falls behind the turned up front edge of the mounting angle. Insert top and side unit
fasteners in holes and tighten, drawing the unit into place. Do not attach ducts to unit prior

to installing unit.

7. Caulk and flash the top and sides as required to form a watertight seal. Top flashing (not factory
supplied) is recommended to ensure that water does not run behind unit. All unit tops are sloped
to allow water to run off.

4

Figure 1 Unit mounting dimensions

Installation

11"

(279mm)

11"

(279mm)

11"

(279mm)

P

J

E

K

A

C

F

K

K

K

DB

G

H

K

See Table 1 below for
keys to dimensions.

L

M ref.

N

Wf

Table 1 Mounting dimensional data

InteleCool 2 dimensional data in. (mm)

Model Wf A B C D E F G H J K L M N P

1.5-2 Ton

3 Ton

4-5 Ton

4 or 5 Ton Unit

w/3 Ton

Openings

38-3/4

(984)20(508)20(508)

38-3/4

(984)28(711)28(711)

42-3/4

30-1/4

(1086)

42-3/4
(1086)

(768)

28

(711)28(711)

29-7/8

(759)

9-3/8

9-13/32

(238)

(239)8(203)

5-3/8

5-3/8

(137)

(137)8(203)18(457)14(356)26(660)

6-1/4

6-7/16

(159)

(164)

7-3/8

7-3/8

(187)

(187)8(203)18(457)14(356)

20-3/4

(527)12(305)

9-7/8
(251)30(762)

15-7/8

(403)

25-1/16

(638)

25-25/64

(645)

37-1/2

(952)

5-15/32

(139)12(305)

5-15/32

(139)12(305)

1-45/64

(43)16(406)

1-45/64

(43)16(406)

3-25/32

(96)

32-5/32

(96)

6-1/64

(24)

15/16

(24)

4-1/2
(114)

4-1/2
(114)

6-1/2
(165)

6-1/2
(165)

2.3 Piping Connections

The InteleCool2 is a self-contained, packaged unit. All refrigerant piping connections are made at the
factory, so no external condenser is required. The evaporator coil condensate drain is factory-supplied
and drains outdoors through the unit base pan. The condensate drain tubing should be checked to be
certain that it is placed through the hole provided in the base pan.

37-7/8

(962)

37-7/8

(962)

41-3/4
(1060)

41-3/4
(1060)

2-15/32

(63)

2-15/32

(63)

4-3/8
(111)

4-3/8
(111)

5

2.4 Ducting

Field-supplied ducting can be attached to the unit duct connection once the unit has been mounted to
the outside wall. The total external static pressure for the duct, including grille, must not exceed the
values shown in Table 5 and Table 6. Indoor discharge air rates are also given in the same tables.

2.5 Electrical Connections

WARNING

!

Use voltmeter to make sure power is turned off before making any electrical connections.

CAUTION

!

Refer to electrical schematic when making connections.

Each unit is shipped from the factory with all internal wiring completed. Refer to the electrical sche­matic when making connections. Electrical connections to be made at the installation site are: line
voltage power supply to the power input and control wiring to remote control (customer supplied or
Liebert option). DO NOT RUN CONTROL WIRING WITH HIGH VOLTAGE!

2.5.1 Power Connections

All power and control wiring and ground connections must be in accordance with the National Electri­cal Code and local codes

Use copper wiring only. Make sure that all connections are tight.

Make sure that the voltage supplied agrees with the voltage specified on the unit nameplate. The
InteleCool2 comes standard with a factory-installed circuit breaker, accessible through an external
access panel. An external, wall-mounted power disconnect switch (field-supplied) may be required for
local codes. If necessary, this switch should be wired according to those codes.

For access to the electrical enclosure:

• Remove the screws securing the middle panel and pull the panel down and forward to remove.

• Remove the screws securing the electric box cover and remove cover.

• Verify that the unit wiring is correct for the actual input power. Some units are built with multi­voltage serial tags. The transformer may need to be re-tapped if the actual input voltage is differ­ent (see serial tag and electrical schematic).

Route the supply power to the customer-supplied disconnect switch (if required) and then to the unit
circuit breaker inside the unit. Route the conduit to the hole provided in the cabinet. Connect the
earth ground to the lug provided near the circuit breaker. Refer to the unit wiring diagram supplied
on the inside of the electrical enclosure cover.

Installation

CAUTION

!

The optional three-phase scroll compressor must rotate in the correct direction to ensure
proper system operation. Wiring must be phased and connected as shown:

• PHASE “A” to T1 or L1

• PHASE “B” to T2 or L2

• PHASE “C” to T3 or L3

2.5.2 Control Connections

Control wiring will be required for the remote control device. This remote device may be a factory- or
field-supplied wall thermostat or similar device. Connections to the unit are made using customary
HVAC low volt wiring terminals R, G, W, and Y. For detailed locations of the low volt wiring termi­nals, please refer to the Figure 11 - Electric panels.

6

Figure 2 Low volt wiring terminals

Liebert Thermostat

See 2.5.2 - Control Connections for further information, refer to the detailed instructions that ship
with the thermostat.

NOTE

This control contains mercury in a sealed tube. Do not place control in the trash at the end of is
useful life. If this control is replacing a control that contains mercury in a sealed tube, do not
place your old control in the trash. Contact your local waste management authority for
instructions regarding recycling and the proper disposal of this control, or of an old control
containing mercury in a sealed tube.
If you have questions, call the thermostat manufacturer, Honeywell, at 800-468-1502.

Installation

Dual Unit Control

The InteleCool® Dual Unit Control is designed to control two InteleCools in a “lead/lag” fashion. The
control contains an electronic timer for switching the operating sequence of two units on a one-, two-,
four-, or eight-day basis. It also contains a two-stage heat/two-stage cool thermostat with individual
heat and cool set points. Light emitting diodes (LEDs) indicate Lead Unit 1 or 2 and power from
Unit 1 or 2. The schedule for lead/lag switchover is adjustable by moving jumpers on the printed cir­cuit board. A jumper is also used to change lead and lag unit before a scheduled changeover (if neces­sary for servicing).

WARNING

!

The original Dual Unit Control (part # 153054G1, produced through March 2002), is phase
sensitive. The latest version Dual Unit Control (Part # 171170G1) is not. Please refer to
specific installation instructions supplied with each control. Failure to follow specific
instructions may damage the control and/or the unit and void the warranty.

NOTE

This control contains mercury in a sealed tube. Do not place control in the trash at the end of
its useful life. If this control is replacing a control that contains mercury in a sealed tube, do
not place your old control in the trash. Contact your local waste management authority for
instructions regarding recycling and the proper disposal of this control, or of an old control
containing mercury in a sealed tube.
If you have questions, call the thermostat manufacturer, Honeywell, at 800-468-1502.

Tele2

Consult the Tele2 user manual for installation instructions.

7

2.6 Outside Air Damper - Optional

Units supplied with fixed (non-modulating) outdoor air damper can be adjusted as follows:

1. Remove the screws from the middle panel and remove panel.

2. Loosen the damper plate screws on the backside of the middle panel.

3. Adjust the damper plate to the desired position and tighten damper plate screws.

4. Replace panels.

2.7 Economizer - Optional

Installation

Insert the top flanged edge of the Economizer hood into the Economizer opening on the unit front
panel. Next, attach the bottom left and right corner of the hood with screws (supplied).

Adjustment

Units supplied with Economizer requiring outside air can be adjusted as follows:

1. Run motor to fully closed position and disconnect 24 VAC from terminals TR and TR1.

2. Connect minimum position potentiometer to terminals P and P1. (See Figure 3. T and T1 are
disconnected.)

3. Reconnect 24 VAC to terminals TR and TR1 and adjust potentiometer for desired minimum
position by turning Q709 adjustment screw clockwise to increase minimum position;
counterclockwise to decrease minimum position.

Installation

Figure 3 Mounting minimum position potentiometer on actuator

Push onto
actuator

8

3.0 CHECKLIST FOR COMPLETE INSTALLATION

___ 1. Proper clearance for service access has been maintained.

___ 2. Equipment is level and mounting fasteners are tight.

___ 3. Ducting completed, if required.

___ 4. Line voltage to power wiring matches equipment nameplate.

___ 5. Power wiring connections completed to disconnect switches, including earth ground. Proper

phase rotation has been observed so that scroll compressor will rotate in the correct direction.

___ 6. Power line circuit breakers or fuses have proper ratings for equipment installed.

___ 7. Control wiring connections completed to optional controls.

___ 8. All wiring connections are tight.

___ 9. Foreign materials have been removed from in and around all equipment installed (shipping

materials, construction materials, tools, etc.).

___ 10. Fans and blowers rotate freely without unusual noise.

WARNING

!

Potentially lethal voltages exist within this equipment during operation. Observe all cautions
and warnings in this manual. Failure to do so could result in serious injury or death. Only
qualified service and maintenance personnel should work with this equipment.

Checklist for Complete Installation

9

4.0 START-UP PROCEDURE

Verify that installation is complete by using the Checklist for Complete Installation.

1. Disconnect all power to the InteleCool2 unit.

2. Adjust remote control to prevent compressor, heat and fan operation.

3. Turn on main breaker and check line voltage on main unit disconnect switch. Line voltage must
be within ± 10 volts of nameplate voltage.

4. Turn ON main unit disconnect switch and check secondary voltage at transformer T1. Voltage at
T1 must be 24 VAC ±2.5V.

5. From the remote control, verify proper operation in all modes.

6. Make sure all blowers, fans, and the scroll compressor are rotating in the correct direction.

7. Check the current draw on all line voltage components and compare with unit nameplate.

8. Check adjustment of the optional outside air damper for the desired balance between the flow of
room air and outdoor air. Use a gauge or non-polluting airflow indicator.

NOTE

If the unit is supplied with crankcase heaters, Liebert recommends that the high voltage be
applied between four and six hours before start-up.

Start-Up Procedure

10

5.0 OPERATION

5.1 Compressorized Cooling

Compressorized cooling is provided by a high efficiency system consisting of a compressor, thermo­static expansion valve, evaporator, and condenser coil.

The InteleCool2 uses R-22 refrigerant in a conventional vapor-compression refrigeration cycle. Heat
is removed from the air in the space by blowing the air across the evaporator coil. As heat is trans­ferred to the refrigerant in the evaporator, the refrigerant boils and turns to a warm vapor. The
refrigerant vapor enters the compressor and is compressed, resulting in high pressure and tempera­ture. After entering the condenser, the hot vapor is condensed to a liquid by the air blown across the
condenser coil. Liquid refrigerant then passes through the thermal expansion valve and into the evap­orator. The expansion reduces the pressure and temperature to complete the cycle.

Figure 4 Refrigeration system

Evaporator

Operation

Thermal expansion
valve (not shown)

Liquid line

Filter drier

Compressors:
Hermetic Reciprocating (1.5, 2 and 3 ton units)
or Scroll
Optional compressor location available

Liquid line

Condenser

11

5.2 Economizer Cooling - Optional

The Economizer mode uses outside air to cool the room when the outside air temperature is cool
enough to allow for economical cooling. Components include the damper, spring return direct drive
actuator, enthalpy sensor and actuator control board with an integral mixed air sensor. Economizer
operation is enabled when the outside conditions meet required temperature and humidity as set on
the enthalpy sensor. If outdoor conditions are favorable on a call for cooling, the damper actuator will
open the Economizer damper. The damper position will be controlled based on the mixed air tempera­ture in the evaporator section. The factory set mixed air temperature target is 50-56°F (10-13°C).

The amount of damper opening depends on the cooling capacity of the outside air; the cooler the out­side air, the less that is needed to cool the room, and so a smaller damper opening is required. As the
outside air temperature rises, the damper will open wider since more of that air is required to keep
the room at the same temperature.

The Economizer and compressorized cooling will never operate at the same time. If outdoor conditions
meet the required enthalpy sensor setpoint during a cooling cycle, the unit will automatically shut
down the compressor and begin using outside air.

5.2.1 Enthalpy Sensor

The enthalpy sensor responds to the total heat content of the outdoor air to provide changeover from
compressorized cooling to free-cooling operation. The changeover point is factory set (at the “D” posi­tion). This setting will ensure rated capacity when the outdoor conditions allow for Economizer cooling.

Figure 5 Enthalpy control setting

70

Operation

5.2.2 Actuator

The Economizer actuator is mounted in the lower part of the Economizer section below the electric
box. It is accessible by opening the lower front panel. The actuator is a 24 VAC, spring return device
that will fully close the Economizer damper. The actuator has internal controls that allow it to oper­ate based on signals from the enthalpy control and mixed air sensor.

65

60

Enthalpy Control

55

50

Temperature (DB°F)

45

40

10 20 30 40 50 60 70 80 90

Operating Range

Outdoor Relative Humidity (%RH)

5.3 Heating - Optional

On units supplied with optional resistance heating, a call for heating closes the heat relay and ener­gizes the evaporator fan and resistive elements.

12

5.4 Unit Controls

5.4.1 Remote Control Interface

Control connections to the InteleCool2 unit use customary HVAC terminal designations R, G, W & Y.
Contact closures between the 24 VAC (R) and different control connections supply control voltage to
the electric panel components responsible for the desired function. Operating modes are controlled by
contact closures as follows:

Table 2 Operating modes/contact closures

Connection Operating Mode

R 24 VAC

G Evaporator Fan

WHeating

Y Cooling (compressorized or Economizer)

Wall-mounted thermostats are to be low voltage, snap action or mercury type. Un-manned sites should
use a HEAT/COOL/AUTO type subbase to provide automatic switchover during climate changes.

5.4.2 High Pressure (Standard)

The high pressure switch is mounted in the liquid line. Electrically, it is connected in series with the
compressor start circuit, which will shut down the compressor and condenser fan if the liquid pres­sure exceeds 400 PSIG (2758 kPa). This protects the InteleCool2 in the event of condenser motor fail­ure or condenser coil blockage.

The pressure switch is an auto reset device. When the system pressure drops below 300 PSIG
(2069 kPa), the switch will reset. (An optional lockout relay is available which allows the switch to be
used as a manual reset safety.) If the call for cooling is present, the compressor start circuit will be
energized and the compressor will start after the 3 minute anti-short cycle time.

Operation

5.4.3 Refrigeration Control Options

Please review the following table for the recommended control options based on the site ambient and
your need for year-round operation.

Table 3 Recommended applications for control options

Application Unit Options Min ambient Max ambient

General Standard None 50°F (10°C) 115°F (46.1°C)

General Standard

General Standard T-pack1 or T-pack2 -20°F (-28.9°C) 115°F (46.1°C)

Telecom/365-day operation Standard T-pack1 or T-pack2 -20°F (-28.9°C) 115°F (46.1°C)

General Standard High ambient 50°F (10°C) 125°F (51.7°C)

General Standard

Telecom/365-day operation Standard High ambient with T-pack1 or T-pack2 -20°F (-28.9°C) 125°F (51.7°C)

Low Pressure Switch and Low Pressure Bypass Timer (Winter Start)

Low Pressure Switch—The low pressure switch is mounted in the compressor suction line. Electri­cally, it is connected in series with the compressor start circuit, which will shut down the compressor
and condenser fan if the suction pressure drops below 35 PSIG (241 kPa). The switch will automati­cally reset once the system pressure rises above its cut-in setting (60 psig, ±5 psig [414 kPa, ±34 kPa]).
This protects the InteleCool2 in the event the evaporator fan fails, the filter becomes clogged or there
is a loss of refrigerant. If the call for cooling is present, the compressor will start after the 3 minute
anti-short cycle time.

Low Pressure Bypass Timer—A low ambient temperature start relay is included with the low
pressure option. This relay locks out (ignores) the low pressure switch on start-up until the system
pressure stabilizes. This bypass relay is adjustable and should be set for 3 minutes greater than the
anti-short cycle timer setting. This option can be used for applications down to 50°F (10°C). For con­trol down to -20°F (-28.9°C), use the T-pack1 and T-pack2 options, which include fan cycle control.

Low pressure with low pressure bypass
timer

High ambient, low pressure with low
pressure bypass timer

50°F (10°C) 115°F (46.1°C)

50°F (10°C) 125°F (51.7°C)

13

T-pack1 package

Includes a low pressure switch, low pressure bypass timer (described above) and fan cycle control.

Fan Cycle Control—Condenser Fan Cycling Control; allows the InteleCool2 unit to provide cooling
to the space when the outdoor ambient temperature is lower than 50°F (10°C) and down to -20°F
(-28.9°C). The control uses a reverse acting pressure switch mounted on the discharge line that cycles
the condenser fan in response to the discharge pressure. On a call for cooling, when the discharge
pressure increases to 250 PSIG (1723 kPa), the switch will close and start the condenser fan. When
the pressure drips below 170 PSIG (1172 kPa) the switch will open and stop the condenser fan. Dur­ing low outdoor temperatures, the pressure switch cycles the condenser fan to maintain discharge
pressure that will allow the system to function.

NOTE

During normal operation in low ambient conditions, the condenser fan will cycle frequently.

T-pack2 package

Includes a low pressure switch, low pressure bypass timer and an adjustable fan cycle control. See
descriptions above.

5.4.4 Anti-Short Cycle Timer - Standard

The anti-short cycle timer protects the compressor from continuous ON-OFF operation and restarts
after momentary power failures. The timer used is adjustable and is set to a minimum of 3 minutes.
On start-up, or any call for cooling after an off cycle of more than 3 minutes, the compressor will start
immediately.

Operation

5.4.5 Heater Protection - With Optional Heat

On units supplied with resistance heating, an auto reset heater safety and a one time (replaceable)
thermal link protects the unit wiring and prevents excessive heat conditions caused by a dirty air fil­ter or fan failure.

5.4.6 Lockout Relay - Optional

The lockout relay latches the detection of a high-pressure condition in the refrigeration circuit and
prohibits operation of the compressor until the abnormal pressure conditions are acknowledged. The
lockout relay is reset by cycling the unit main power or by changing the setpoint on the thermostat to
temporarily eliminate a call for cooling. A normally open set of contacts is provided to terminals 2 and
3 of the customer terminal strip for monitoring the status of the lock out relay when this option is sup­plied without the Common Alarm option.

5.4.7 Common Alarm - Optional

Alarm components are an evaporator air sail switch, evaporator high temperature switch, control
relays and an adjustable time delay relay with two normally open and two normally closed alarm con­tacts. The alarm contacts will activate in the event of a loss of airflow across the evaporator blower,
high evaporator temperature or in the event that the compressor is not functioning due to an abnor­mal pressure condition. The adjustable time delay relay can be adjusted for a delay of up to 90 sec­onds to eliminate nuisance tripping of the alarm contacts. To detect low pressure, the optional low
pressure switch with bypass, T-pack1 or T-pack2 must also be selected.

14

6.0 MAINTENANCE

WARNING

!

Potentially lethal voltages exist within this equipment during operation. Observe all cautions
and warnings in this manual. Failure to do so could result in serious injury or death. Only
qualified service and maintenance personnel should work with this equipment.

6.1 Filters

Replaceable evaporator air filter(s) are supplied with the unit. The filter(s) are easily serviceable from
the outside, through the top front access panel.

Filters are usually the most neglected item in an environmental control system. To maintain efficient
operation, they should be checked monthly and changed as required. Units supplied with Economiz­ers may require replacement filters more frequently because of airborne dust and organic materials.

Filters can be replaced from the front by opening the lower front access panel.

WARNING

!

Power must be OFF while replacing the filter.

6.2 Blower Package

Periodic checks of the blower package include: blower wheels, housings, motor and motor mounting
bracket. With the power off, inspect and remove any debris from the wheels and housings. Also check
to see that they are tightly mounted on the motor shaft and rotate freely without rubbing against the
housing.

Maintenance

WARNING

!

POWER MUST BE OFF WHILE INSPECTING THE BLOWER EQUIPMENT.

6.3 Economizer - Optional

Each month, the Economizer should be inspected and any debris removed from the intake hood,
damper blade and enthalpy sensor.

6.4 Heat

Heaters can be serviced and/or removed from inside through the discharge opening or from outside by
removing the top.

WARNING

!

Power must be OFF while working on heaters.

6.5 Refrigeration System

Each month, the components of the refrigeration system should be inspected for proper function and
signs of wear. Since, in most cases, evidence of malfunction is present prior to component failure, peri­odic inspections can be a major factor in the prevention of most system failures.

6.5.1 Refrigerant Lines

Check all refrigerant lines and capillaries for vibration isolation, and support as necessary. Visually
inspect all refrigerant lines for leaks.

6.5.2 Discharge Pressure

Discharge pressure can be increased or decreased by load conditions or condenser efficiency. The
high-pressure switch will shut the compressor/contactor at its cut-out setting of 400 PSIG (2758 kPa).
See 5.4.2 - High Pressure (Standard).

15

6.5.3 Thermostatic Expansion Valve

The thermostatic expansion valve (TEV) keeps the evaporator supplied with enough refrigerant to
satisfy load conditions. It does not turn the compressor on or off, but maintains proper refrigerant
super heat in the suction gas to the compressor.

Determine TEV operation by measuring superheat. If too little refrigerant is being fed to the evapora­tor, the superheat will be high; if too much refrigerant is being supplied, the superheat will be low.
The correct superheat setting is between 10° and 15°F (5.5° and 8.3°C), under normal load conditions
and “steady-state” operation. Some models of InteleCool2 will be supplied with a non-adjustable
expansion valve, so no adjustments are possible.

To adjust the superheat setting when an adjustable valve is used:

1. Remove the valve cap from the base of the valve.

2. Turn the adjustment stem counter-clockwise to lower the superheat.

3. Turn the adjustment stem clockwise to increase the superheat.

NOTE

Make no more than 1/4 turn of the stem at a time. As long as 30 minutes may be required
for the new balance to take place.

To determine superheat:

1. Measure the temperature of the suction line at the point where the TEV bulb is clamped.

2. Obtain the gauge pressure at the compressor suction valve.

3. Add the estimated pressure drop between bulb location and the suction valve.

4. Convert the sum of the two pressures to the saturated temperature.

5. Subtract this temperature from the actual suction line temperature. The difference is superheat.

Maintenance

6.5.4 Air-Cooled Condenser

Restricted airflow through the condenser coil will reduce the operating efficiency of the unit and can
result in high compressor head pressure and loss of cooling.

Clean the condenser coil each time the evaporator filters are replaced. Check for bent or damaged coil
fins and repair as needed. Check all refrigerant lines for leaks. Clean the condenser coil of all debris
that will inhibit airflow. This can be done with compressed air or commercial coil cleaner.

6.6 Compressor

Infrequently, a fault in the motor insulation may result in a motor burn. However, in a properly
installed system, burnouts rarely occur. Of those that do, most are the result of mechanical or lubrica­tion failures, resulting in the burnout as a secondary consequence.

If the problems that can cause compressor failures are detected and corrected early, a large percent­age can be prevented. Periodic maintenance inspections by alert service personnel on the lookout for
abnormal operation can be a major factor in reducing maintenance costs. It is easier and far less
costly to take the steps necessary to ensure proper system operation than it is to allow a compressor
to fail and require replacement.

When troubleshooting a compressor, check all electrical components for proper operation, including
all fuses and circuit breakers and pressure switch operation.

If a compressor failure has occurred, determine whether it is an electrical or mechanical failure.

Mechanical Failure

A mechanical compressor failure will not be indicated by a burned odor. The motor will attempt to
run. If you have determined that a mechanical failure has occurred, the compressor must be replaced.

16

Electrical Failure

An electrical failure will be indicated by a distinct pungent odor. If a severe burnout has occurred, the
oil will be black and acidic. If a burnout does occur, correct the problem that caused the burnout and
clean the system thoroughly using the proper procedure. It is important to note that successive burn­outs of the same system are usually caused by improper cleaning.

CAUTION

!

Damage to a replacement compressor caused by improper system cleaning constitutes
abuse under the terms of the warranty, and the WARRANTY WILL BE VOIDED.

There are two kits that can be used with a complete compressor burnout: Sporlan System Cleaner and
Alco Dri-Kleener. Whichever kit is used, follow the manufacturer’s procedure.

CAUTION

!

Avoid skin contact with the refrigerant and oils. Severe burns will result.
Use long rubber gloves when handling contaminated parts.

6.6.1 Compressor Replacement

Replacement compressors are available from your Liebert supplier. They will be shipped in a reusable
crate to the job site as required by the service contractor.

Upon shipping a replacement compressor, the service contractor will be billed in full for the compres­sor until the failed compressor has been returned to the factory.

Maintenance

The compressor should be returned in the same container used for shipping to the job. The possible
damage causes or conditions that were found should be recorded by marking the compressor return
tag.

1. Disconnect power.

2. Attach suction and discharge gauges to access fittings.

3. Recover refrigerant using standard recovery procedures and equipment. Use a filter drier when
charging the system with recovered refrigerant.

CAUTION

!

Do not loosen any refrigeration or electrical connections before relieving system pressure from
both sides of the compressor.

NOTE

Release of refrigerant to the atmosphere is harmful to the environment and is unlawful.
Refrigerant must be recycled or discarded in accordance with federal, state, and local
regulations.

4. Disconnect all electrical connections.

5. Remove failed compressor.

CAUTION

!

The optional three-phase scroll compressor must rotate in the correct direction to ensure
proper system operation. Wiring must be phased and connected as shown:

• PHASE “A” to T1 or Ll

• PHASE “B” to T2 or L2

• PHASE “C” to T3 or L3

6. Install replacement compressor and make all connections.

7. Pressurize and leak test the system at approximately 150 PSIG (1034 kPa) pressure.

8. Follow manufacturer’s instructions for cleanout kits.

17

Maintenance

9. Connect a vacuum pump to both the high and low sides of the system through properly sized
connections. Evacuate the system twice to 1500 microns, and the third time to 500 microns. Break
the vacuum each time with dry nitrogen to 2 PSIG (13.8 kPa).

10. Charge the system with refrigerant. Refer to unit serial tag for refrigerant charge amount.

11. Apply power and operate system. Check for proper operation. Suction and discharge pressures
will vary with load conditions and coil efficiency. The low pressure switch will shut the
compressor down if the suction pressure falls below the cutout setting. Conversely, the high
pressure switch will shut down the compressor if the discharge pressure exceeds the cutout
setting. High suction pressure reduces the ability of the refrigerant to cool compressor
components and can result in compressor damage. Refer to Table 4.

NOTE

High side gauge port is a liquid line connection. Proper procedures should be followed
when installing and removing gauges. A 6-foot (1.8 m) hose can hold up to 3 oz (0.1 l) of
refrigerant. Be sure to purge high side to low prior to removal.

Table 4

Design
Pressures
psig (kPA)

Suction 35 (241) 90 (620)

Based on indoor conditions of 80°F (26.7°C), 50% RH, with clean filter(s).

Pressure information

Minimum

psig (kPa)

R-22

Liquid (Approx.) PSIG (kPa)

95°F (35°C) Ambient 250-290 (1723-2000)

Maximum 360-380 (2480-2618)

High Pressure Cutout 400 (2756)

Maximum

psig (kPa)

R-22

18

7.0 SPECIFICATIONS

7.1 Dimensional Data

Figure 6 Dimensional data

Ws

J

4"

(102mm)

2-1/4"

(58mm)

Entrance for high

volt connections

E

A

supply

Specifications

Wu

F

1-11/16"

C

(43mm)

Entrance

for low volt

connections

L

D

Shaded areas indicate a recommended clearance
of 34" (864mm) in front and 30" (762mm) each side,
or 36" (914mm) when mounted adjacent to another
unit, for component access. For recommended
minimum clearances, refer to 2.1.2 - Location Con­siderations.

See Table 5 below for dimensions.

K

G

B

return

H

Wf

2-1/4"

(58mm)

Table 5 InteleCool2 dimensional data in. (mm)

Dimensional Data in. (mm)

InteleCool Model Wu Ws Wf A B C D E F G H J K L

37-1/8

17-3/4

1.5/2 Ton

3 Ton

4/5 Ton

4 or 5 Ton Unit

w/ 3 Ton Openings41(1041)

(943)

37-1/8

(943)

41

(1041)

38-3/4

(451)

(984)20(508)20(508)

17-3/4

38-3/4

(451)

(984)28(711)28(711)

22-1/2

42-3/4

(572)

(1086)

22-1/2

42-3/4

(572)

(1086)28(711)28(711)

30-1/4

(768)

29-7/8

(759)

9-3/8

9-13/32

(238)

(239)8(203)

5-3/8

5-3/8

(137)

(137)8(203)18(457)14(356)26(660)

6-1/4

6-7/16

(159)

(164)

7-3/8

7-3/8

(187)

(187)8(203)18(457)14(356)

20-3/4

(527)12(305)

9-7/8
(251)30(762)

15-7/8

(403)

25-1/16

(638)

25-25/64

(645)83(2108)44(1118)

37-1/2

(952)83(2108)44(1118)

69-3/4
(1772)

69-3/4
(1772)

36-3/16

(919)

36-3/16

(919)

31-5/8

(803)

31-5/8

(803)

39-1/2
(1003)

39-1/2
(1003)

19

Specifications

7.2 Technical Data

Table 6 Technical data, 60 Hz

Model ET018 ET024 ET036

Compressor type Hermetic Scroll Hermetic Scroll Hermetic Scroll

Net capacity data based on 80°F (26.6°C) DB/67°F (19.4°C) WB indoor ambient - BTUH (kW)*

Outdoor ambient

85°F

(29.4°C)

95°F

(35.0°C)

105°F

(40.6°C)

115°F

(46.1°C)**

Net capacity data based on 75°F (23.9°C) DB/62.5°F (16.9°C) WB indoor ambient - BTUH (kW)*

Outdoor ambient

85°F

(29.4°C)

95°F

(35.0°C)

105°F

(40.6°C)

115°F

(46.1°C)**

Evaporator Air Flow - Dry Coil

External Static Pressure CFM (m

0.0 - IN WG (0.0 Pa) 870 (1480) 930 (1580) 1300 (2210)

0.1 - IN WG (25 Pa) 830 (1410) 880 (1500) 1220 (2070)

0.2- IN WG (50 Pa) 780 (1320) 840 (1430) 1130 (1920)

0.3 - IN WG (75 Pa) 750 (1260) 800 (1360) 1030 (1750)

0.4- IN WG (100 Pa) 670 (1140) 730 (1240) 920 (1560)

0.5 - IN WG (125 Pa) 590 (1000) 650 (1100) 820 (1390)

Evaporator Air Flow - Wet Coil

External Static Pressure CFM (m

0.0 - IN WG (0.0 Pa) 850 (1440) 910 (1550) 1200 (2040)

0.1 - IN WG (25 Pa) 810 (1380) 860 (1460) 1120 (1900)

0.2 - IN WG (50 Pa) 770 (1310) 820 (1390) 1030 (1750)

0.3 - IN WG (75 Pa) 720 (1220) 780 (1320) 940 (1600)

0.4- IN WG (100 Pa) 650 (1100) 710 (1210) 850 (1440)

0.5- IN WG (125 Pa) 570 (970) 620 (1050) 750 (1270)

Evaporator

Motor Hp (kW) 0.25 (0.19) 0.25 (0.19) 0.25 (0.19)

Filter Sizes - Quantity in. (cm)

Drain Connection - ID in. 3/4 3/4 3/4

Weight w/o Economizer Ib (kg) 330 (150) 330 (150) 330 (150)

Weight w/ Economizer Ib (kg) 350 (159) 350 (159) 350 (159)

* Based on rated airflow with no external static and no outside air.
** For applications above 115°F (46.1°C) use high ambient option.

Total 20700 (6.07) 20000 (5.86) 24800 (7.27) 23400 (6.86) 36100 (10.58) 36200 (10.61)

Sensible 17700 (5.19) 17500 (5.13) 19700 (5.77) 19100 (5.60) 27000 (7.91) 27000 (7.91)

Total 19300 (5.65) 19200 (5.63) 23200 (6.80) 22400 (6.56) 33800 (9.90) 34600 (10.14)

Sensible 17200 (5.04) 17200 (5.04) 19100 (5.60) 18800 (5.51) 26100 (7.65) 26400 (7.74)

Total 18000 (5.27) 18300 (5.36) 21600 (6.33) 21300 (6.24) 31500 (9.23) 32900 (9.64)

Sensible 16700 (4.89) 16900 (4.95) 18500 (5.42) 18400 (5.39) 25200 (7.38) 25700 (7.53)

Total 17000 (4.98) 17600 (5.16) 20000 (5.86) 20200 (5.92) 29000 (8.50) 31100 (9.11)

Sensible 17000 (4.98) 17600 (5.16) 17900 (5.24) 18000 (5.27) 24300 (7.12) 25100 (7.35)

Total 19200 (5.63) 18700 (5.48) 23000 (6.74) 21800 (6.39) 33600 (9.84) 33800 (9.90)

Sensible 17100 (5.01) 16900 (4.95) 19000 (5.57) 18500 (5.42) 26200 (7.68) 26300 (7.71)

Total 17800 (5.22) 17900 (5.24) 21500 (6.30) 20900 (6.12) 31400 (9.20) 32300 (9.46)

Sensible 16600 (4.86) 16600 (4.86) 18400 (5.39) 18200 (5.33) 25300 (7.41) 25700 (7.53)

Total 16900 (4.95) 17300 (5.07) 20000 (5.86) 19900 (5.83) 29200 (8.56) 30800 (9.02)

Sensible 16900 (4.95) 17300 (5.07) 17800 (5.22) 17800 (5.22) 24400 (7.15) 25000 (7.32)

Total 15700 (4.60) 16500 (4.83) 18400 (5.39) 18800 (5.51) 26900 (7.88) 29000 (8.50)

Sensible 15700 (4.60) 16500 (4.83) 17200 (5.04) 17300 (5.07) 23500 (6.89) 24300 (7.12)

3

/hr)

3

/hr)

16 x 32.5 x 2 - one

(40.6 x 82.5 x 5)

16 x 32.5 x 2 - one

(40.6 x 82.5 x 5)

16 x 32.5 x 2 - one

(40.6 x 82.5 x 5)

20

Table 7 Technical data, 60 Hz, continued

Model ET048, ET348 ET060, ET360

Compressor Type Scroll Scroll

Net capacity data based on 80°F (26.6°C) DB/67°F (19.4°C) WB indoor ambient - BTUH (kW)*

Outdoor ambient

85°F

(29.4°C)

95°F

(35.0°C)

105°F

(40.6°C)

115°F

(46.1°C)**

Net capacity data based on 75°F (23.9°C) DB/62.5°F (16.9°C) WB indoor ambient - BTUH (kW)*

Outdoor ambient

85°F

(29.4°C)

95°F

(35.0°C)

105°F

(40.6°C)

115°F

(46.1°C)**

Evaporator Air Flow - Dry Coil (Derate ESP by 0.2 - IN WG (50 Pa) for ET348 and ET360)

External Static Pressure CFM (m

0.0 - IN WG (0.0 Pa) 2030 (3450) 2030 (3450)

0.1 - IN WG (25 Pa) 1910 (3240) 1910 (3240)

0.2 - IN WG (50 Pa) 1770 (3010) 1770 (3010)

0.3 - IN WG (75 Pa) 1650 (2800) 1650 (2800)

0.4 - IN WG (100 Pa) 1520 (2580) 1520 (2580)

0.5 - IN WG (125 Pa) 1390 (2360) 1390 (2360)

Evaporator Air Flow - Wet Coil (Derate ESP by 0.2 - IN WG (50 Pa) for ET348 and ET360)

External Static Pressure CFM (m

0.0 - IN WG (0.0 Pa) 1800 (3060) 1800 (3060)

0.1 - IN WG (25 Pa) 1680 (2850) 1680 (2850)

0.2 - IN WG (50 Pa) 1580 (2680) 1580 (2680)

0.3 - IN WG (75 Pa) 1470 (2500) 1470 (2500)

0.4 - IN WG (100 Pa) 1360 (2310) 1360 (2310)

0.5 - IN WG (125 Pa) 1250 (2120) 1250 (2120)

Evaporator

Motor Hp (kW) 0.50 (0.37) 0.50 (0.37)

Filter Sizes - Quantity in. (cm)

Drain Connection - ID in. 3/8 3/8

Weight - w/o Economizer Ib/kg 470 (213) 470 (213)

Weight - with Economizer Ib/kg 490 (222) 490 (222)

* Based on rated airflow with no external static and no outside air.
** For applications above 115°F (46.1°C) use high ambient option.

Total 49100 (14.39) 58500 (17.14)

Sensible 39300 (11.51) 42800 (12.54)

Total 46900 (13.74) 56000 (16.41)

Sensible 38400 (11.25) 41900 (12.28)

Total 44500 (13.04) 53400 (15.65)

Sensible 37600 (11.02) 40900 (11.98)

Total 42000 (12.31) 50500 (14.80)

Sensible 36700 (10.75) 39800 (11.66)

Total 46000 (13.48) 54900 (16.09)

Sensible 38200 (11.19) 41900 (12.28)

Total 43800 (12.83) 52400 (15.35)

Sensible 37300 (10.93) 40800 (11.95)

Total 41500 (12.16) 49800 (14.59)

Sensible 36300 (10.64) 39700 (11.63)

Total 39200 (11.49) 47100 (13.80)

Sensible 35400 (10.37) 38600 (11.31)

3

/hr)

3

/hr)

21 x 36.25 x 2 - one

(53.3 x 92 x 5)

21 x 36.25 x 2 - one

(53.3 x 92 x 5)

Specifications

21

Specifications

Table 8 Technical data, 50 Hz

Model ET017 ET023 ET035

Compressor type Hermetic Scroll Hermetic Scroll Hermetic Scroll

Net capacity data based on 26.6°C (80°F) DB/19.4°C (67°F) WB indoor ambient - kW (BTUH)*

Outdoor ambient

29.4°C
(85°F)

35.0°C
(95°F)

40.6°C

(105°F)

46.1°C

(115°F**)

Net capacity data based on 23.9°C (75°F) DB 16.9°C (62.5°F) WB indoor ambient - kW (BTUH)*

Outdoor ambient

29.4°C
(85°F)

35.0°C
(95°F)

40.6°C

(105°F)

46.1°C

(115°F)**

Evaporator Air Flow - Dry Coil

External Static Pressure M

0.0 Pa (0.0 - IN WG) 1230 (720) 1320 (770) 1840 (1080)

25 Pa (0.1 - IN WG) 1170 (690) 1240 (730) 1730 (1020)

50 Pa (0.2 - IN WG) 1100 (650) 1190 (700) 1600 (940)

75 Pa (0.3 - IN WG) 1060 (620) 1130 (670) 1460 (860)

100 Pa (0.4 - IN WG) - - -

125 Pa (0.5 - IN WG) - - -

Evaporator Air Flow - Wet Coil

External Static Pressure M

0.0 Pa (0.0 - IN WG) 1200 (710) 1290 (760) 1700 (1000)

25 Pa (0.1 - IN WG) 1150 (670) 1220 (720) 1590 (930)

50 Pa (0.2 - IN WG) 1090 (640) 1160 (680) 1460 (860)

75 Pa (0.3 - IN WG) 1020 (600) 1100 (650) 1330 (780)

100 Pa (0.4 - IN WG) - - -

125 Pa (0.5 - IN WG) - - -

Evaporator

Motor kW (Hp) 0.19 (0.25) 0.19 (0.25) 0.19 (0.25)

Filter Sizes - Quantity cm (in.)

Drain Connection - ID in. 3/4 3/4 3/4 (1.9)

Weight - w/o Economizer kg (Ib) 150 (330) 150 (330) 150 (330)

Weight - with Economizer kg (Ib) 159 (350) 159 (350) 159 (350)

* Based on rated airflow with no external static and no outside air.
** For applications above 46.1°C (115°F) use high ambient option.

Total 5.19 (17700) 5.92 (20200) 6.21 (21200) 6.62 (22600) 8.97 (30600) 8.53 (29100)

Sensible 4.45 (15200) 4.72 (16100) 4.98 (17000) 5.13 (17500) 6.74 (23000) 6.56 (22400)

Total 4.83 (16500) 5.63 (19200) 5.83 (19900) 6.33 (21600) 8.44 (28800) 8.12 (27700)

Sensible 4.31 (14700) 4.63 (15800) 4.83 (16500) 5.01 (17100) 6.53 (22300) 6.42 (21900)

Total 4.45 (15200) 5.36 (18300) 5.42 (18500) 6.01 (20500) 7.88 (26900) 7.68 (26200)

Sensible 4.19 (14300) 4.51 (15400) 4.69 (16000) 4.89 (16700) 6.33 (21600) 6.24 (21300)

Total 4.19 (14300) 5.04 (17200) 5.01 (17100) 5.65 (19300) 7.32 (25000) 7.21 (24600)

Sensible 4.19 (14300) 4.39 (15000) 4.54 (15500) 4.75 (16200) 6.12 (20900) 6.09 (20800)

Total 4.81 (16400) 5.54 (18900) 5.74 (19600) 6.15 (21000) 8.38 (28600) 8.00 (27300)

Sensible 4.28 (14600) 4.57 (15600) 4.81 (16400) 4.98 (17000) 6.56 (22400) 6.42 (21900)

Total 4.48 (15300) 5.27 (18000) 5.39 (18400) 5.89 (20100) 7.85 (26800) 7.59 (25900)

Sensible 4.16 (14200) 4.48 (15300) 4.66 (15900) 4.86 (16600) 6.36 (21700) 6.24 (21300)

Total 4.22 (14400) 4.98 (17000) 4.98 (17000) 5.60 (19100) 7.32 (25000) 7.18 (24500)

Sensible 4.22 (14400) 4.37 (14900) 4.51 (15400) 4.75 (16200) 6.12 (20900) 6.07 (20700)

Total 3.90 (13300) 4.69 (16000) 4.60 (15700) 5.24 (17900) 6.83 (23300) 6.71 (22900)

Sensible 3.90 (13300) 4.25 (14500) 4.34 (14800) 4.60 (15700) 5.92 (20200) 5.89 (20100)

3

/hr (CFM)

3

/hr (CFM)

40.6 x 82.5 x 5 - one
(16 x 32.5 x 2)

40.6 x 82.5 x 5 - one
(16 x 32.5 x 2)

16 x 32.5 x 2 - one

(40.6 x 82.5 x 5)

22

Table 9 Technical data, 50 Hz, continued

Model ET047, ET347 ET059, ET359

Compressor type Scroll Scroll

Net capacity data based on 26.6°C (80°F) DB/19.4°C (67°F) WB indoor ambient - kW (BTUH)*

Outdoor ambient

29.4°C
(85°F)

35.0°C
(95°F)

40.6°C

(105°F)

46.1°C

(115°F)**

To ta l

Sensible

To ta l

Sensible

To ta l

Sensible

To ta l

Sensible

Net capacity data based on 23.9°C (75°F) DB/16.9°C (62.5°F) WB indoor ambient - kW (BTUH)*

Outdoor Ambient

29.4°C
(85°F)

35.0°C
(95°F)

46.1°C

(115°F)**

46.1°C

(115°F)**

Total 11.43 (39000) 14.03 (47900)

Sensible 9.46 (32300) 10.55 (36000)

Total 10.90 (37200) 13.45 (45900)

Sensible 9.26 (31600) 10.28 (35100)

Total 10.34 (35300) 12.83 (43800)

Sensible 9.02 (30800) 10.05 (34300)

Total 9.76 (33300) 12.13 (41400)

Sensible 8.79 (30000) 9.76 (33300)

Evaporator Air Flow - Dry Coil (Derate ESP by 0.15 - IN WG (50 Pa) for ET347 and ET359)

External Static Pressure M

0.0 Pa (0.0 - IN WG) 2870 (1690) 2870 (1690)

25 Pa (0.1 - IN WG) 2700 (1590) 2700 (1590)

50 Pa (0.2 - IN WG) 2500 (1470) 2500 (1470)

75 Pa (0.3 - IN WG) 2330 (1370) 2330 (1370)

100 Pa (0.4 - IN WG) - -

125 Pa (0.5 - IN WG) - -

Evaporator Air Flow - Wet Coil (Derate ESP by 0.15 - IN WG (50 Pa) for ET347 and ET359)

External Static Pressure M

0.0 Pa (0.0 - IN WG) 2550 (1500) 2550 (1500)

25 Pa (0.1 - IN WG) 2380 (1400) 2380 (1400)

50 Pa (0.2 - IN WG) 2240 (1320) 2240 (1320)

75 Pa (0.3 - IN WG) 2070 (1220) 2070 (1220)

100 Pa (0.4 - IN WG) - -

125 Pa (0.5 - IN WG) - -

Evaporator

Motor kW (Hp) 0.37 (0.50) 0.37 (0.50)

Filter Sizes - Quantity cm (in.)

Drain Connection - ID in. 3/4 3/4

Weight - w/o Economizer kg (lb) 213 (470) 213 (470)

Weight - with Economizer kg (lb) 222 (490) 222 (490)

* Based on rated airflow with no external static and no outside air.
** For applications above 46.1°C (115°F) use high ambient option.

12.22 (41700) 14.97 (51100)

9.73 (33200) 10.78 (36800)

11.66 (39800) 14.36 (49000)

9.52 (32500) 10.55 (36000)

11.05 (37700) 13.68 (46700)

9.32 (31800) 10.28 (35100)

10.43 (35600) 13.01 (44400)

9.08 (31000) 10.05 (34300)

3

/hr (CFM)

3

/hr (CFM)

53.3 x 92 x 5 - one
(21 x 36.25 x 2)

53.3 x 92 x 5 - one
(21 x 36.25 x 2)

Specifications

23

Table 10 Optional heater capacity, 60 Hz

Heater Capacity - kW

Nominal Heater Rating

5 kW

Capacity @ 208V-1ph 3.756 3.756 3.756 3.756 3.756
Capacity @ 230V-1ph 4.592 4.592 4.592 4.592 4.592
Capacity @ 240V-1ph 5.000 5.000 5.000 5.000 5.000
Capacity @ 208V-3ph n/a 3.756 3.756 3.756 3.756
Capacity @ 230V-3ph n/a 4.592 4.592 4.592 4.592
Capacity @ 240V-3ph n/a 5.000 5.000 5.000 5.000
Capacity @ 460V-3ph n/a 4.592 4.592 4.592 4.592
Capacity @ 480V-3ph n/a 5.000 5.000 5.000 5.000

10 kW

Capacity @ 208V-1ph 7.511 7.511 7.511 7.511 7.511
Capacity @ 230V-1ph 9.184 9.184 9.184 9.184 9.184
Capacity @ 240V-1ph 10.000 10.000 10.000 10.000 10.000
Capacity @ 208V-3ph n/a 7.511 7.511 7.511 7.511
Capacity @ 230V-3ph n/a 9.184 9.184 9.184 9.184
Capacity @ 240V-3ph n/a 10.000 10.000 10.000 10.000
Capacity @ 460V-3ph n/a 9.184 9.184 9.184 9.184
Capacity @ 480V-3ph n/a 10.000 10.000 10.000 10.000

15 kW

Capacity @ 208V-1ph n/a n/a 11.267 11267 11267
Capacity @ 230V-1ph n/a n/a 13.776 13776 13776
Capacity @ 240V-1ph n/a n/a 15.000 15.000 15.000
Capacity @ 208V-3ph n/a n/a 11.267 11.267 11.267
Capacity @ 230V-3ph n/a n/a 13.776 13.776 13.776
Capacity @ 240V-3ph n/a n/a 15.000 15.000 15.000
Capacity @ 460V-3ph n/a n/a 13.776 13.776 13.776
Capacity @ 480V-3ph n/a n/a 15.000 15.000 15.000

1.5 Ton 2 Ton 3 Ton 4 Ton 5 Ton

Specifications

Table 11 Optional heater capacity, 50 Hz

Heater Capacity - kW

Nominal Heater Rating

5 kW

Capacity @ 220V-1ph 4.201 4.201 4.201 4.201 4.201
Capacity @ 240V-1ph 5.000 5.000 5.000 5.000 5.000
Capacity @ 200V-3ph 3.472 3.472 3.472 3.472 3.472
Capacity @ 230V-3ph n/a 4.592 4.592 4.592 4.592
Capacity @ 240V-3ph n/a 5.000 5.000 5.000 5.000
Capacity @ 380V-3ph n/a 4.192 4.192 4.192 4.192
Capacity @ 415V-3ph n/a 5.000 5.000 5.000 5.000

10 kW

Capacity @ 220V-1ph 8.403 8.403 8.403 8.403 8.403
Capacity @ 240V-1ph 10.000 10.000 10.000 10.000 10.000
Capacity @ 200V-3ph n/a 6.944 6.944 6.944 6.944
Capacity @ 230V-3ph n/a 9.184 9.184 9.184 9.184
Capacity @ 240V-3ph n/a 10.000 10.000 10.000 10.000
Capacity @ 380V-3ph n/a 8.384 8.384 8.384 8.384
Capacity @ 415V-3ph n/a 10.000 10.000 10.000 10.000

15 kW

Capacity @ 220V-1ph n/a n/a 12.604 12.604 12.604
Capacity @ 240V-1ph n/a n/a 15.000 15.000 15.000
Capacity @ 200V-3ph n/a n/a 10.417 10.417 10.417
Capacity @ 230V-3ph n/a n/a 13.776 13.776 13.776
Capacity @ 240V-3ph n/a n/a 15.000 15.000 15.000
Capacity @ 380V-3ph n/a n/a 12.577 12.577 12.577
Capacity @ 415V-3ph n/a n/a 15.000 15.000 15.000

1.5 Ton 2 Ton 3 Ton 4 Ton 5 Ton

24

Specifications

Table 12 Electrical data, 60 Hz - amps

15 kW Heat*

No Heat 5 kW Heat 10 kW Heat

Model Volts Phase

FLA WSA OPD FLA WSA OPD FLA WSA OPD FLA WSA OPD FLA WSA OPD

ET018H 208/230 1 13.4 15.8 25 23.4 29.3 30 44.4 55.5 60 NA

ET018S 208/230 1 14.5 17.2 25 23.4 29.3 30 44.4 55.5 60 NA

ET024H 208/230 1 14.7 17.4 25 23.4 29.3 30 44.4 55.5 60 NA

ET024S 208/230 1 15.2 18.1 30 23.4 29.3 30 44.4 55.5 60 NA

ET024H 208/230 3 11.3 13.2 20 14.4 18 20 26.4 33 35 NA

ET024S 208/230 3 11.7 13.7 20 14.4 18 20 26.4 33 35 NA

ET024H 460 3 5.9 6.9 15 7.3 9.1 15 13.3 16.6 20 NA

ET024S 460 3 5.9 6.9 15 7.3 9.1 15 13.3 16.6 20 NA

ET036H 208/230 1 21.8 26.3 45 23.4 29.3 45 44.4 55.5 60 44.4 55.5 60 21 26.3 30

ET036S 208/230 1 19.5 23.4 40 23.4 29.3 40 44.4 55.5 60 44.4 55.5 60 21 26.3 30

ET036H 208/230 3 15.2 18.1 30 15.2 18.1 30 26.4 33 35 38.4 48 50

ET036S 208/230 3 15.2 18.1 30 15.2 18.1 30 26.4 33 35 38.4 48 50

ET036H 460 3 6.8 8 15 7.3 9.1 15 13.3 16.6 20 19.3 24.1 25

ET036S 460 3 7.7 9.1 15 7.7 9.1 15 13.3 16.6 20 19.3 24.1 25

ET048S
ET348S

ET048S
ET348S

ET048S
ET348S

ET060S
ET360S

ET060S
ET360S

ET060S
ET360S

* 15 kW heat option @ 208/230 - 1 phase requires two electrical feeds.
Circuit 1 supplies the compressor, condenser, 10 kW heat and the evaporator motor.
Circuit 2 supplies the remaining 5 kW heat.

208/230 1 31.9 38 50 31.9 38 50 46.2 57.8 60 46.2 57.8 60 21 26.3 30

208/230 3 21.9 25.5 35 21.9 25.5 35 28.2 35.3 35 40.2 50.3 60

460 3 11 12.8 20 11 12.8 20 14.1 17.6 20 20.1 25.1 30

208/230 1 37.7 45.2 60 37.7 45.2 60 46.2 57.8 60 46.2 57.8 60 21 26.3 30

208/230 3 28.3 33.5 50 28.3 33.5 50 28.3 35.3 50 40.2 50.3 50

460 3 13.8 16.3 25 13.8 16.3 25 14.1 17.6 25 20.1 25.1 30

Circ1 Circ2

25

Specifications

Table 13 Electrical data, 50 Hz - amps

15 kW Heat*

No Heat 5 kW Heat 10 kW Heat

Model Volts Phase

FLA WSA OPD FLA WSA OPD FLA WSA OPD FLA WSA OPD FLA WSA OPD

ET017H 220/240 1 12.8 15.1 20 23.4 29.3 30 44.4 55.5 60 NA

ET017S 220/240 1 13.8 16.3 25 23.4 29.3 30 44.4 55.5 60 NA

ET023H 220/240 1 13.7 16.2 25 23.4 29.3 30 44.4 55.5 60 NA

ET023S 220/240 1 15.2 18.1 30 23.4 29.3 30 44.4 55.5 60 NA

ET023H 380/415 3 5.9 6.9 15 8.3 10.4 15 15.3 19.1 20 NA

ET023S 380/415 3 6.3 7.4 15 8.3 10.4 15 15.3 19.1 20 NA

ET035H 220/240 1 20.3 24.4 40 23.4 29.3 40 44.4 55.5 60 44.4 55.5 60 21 26.3 30

ET035S 220/240 1 17.4 20.8 35 23.4 29.3 35 44.4 55.5 60 44.4 55.5 60 21 26.3 30

ET035H 200/230 3 15.2 18.1 30 15.2 18.1 30 26.4 33 35 38.4 48 50

ET035S 200/230 3 14.5 17.2 25 14.5 18 25 26.4 33 35 38.4 48 50

ET035H 380/415 3 6.8 8 15 8.3 10.4 15 15.3 19.1 20 22.3 27.9 30

ET035S 380/415 3 7.7 9.1 15 8.3 10.4 15 15.3 19.1 20 22.3 27.9 30

ET047S
ET347S

ET047S
ET347S

EF059S
ET359S

ET059S
ET359S

* 15 kW heat option @ 220/240 - 1 phase requires two electrical feeds.
Circuit 1 supplies the compressor, condenser, 10 kW heat and the evaporator motor.
Circuit 2 supplies the remaining 5 kW heat.

200/230 3 21.9 25.5 35 21.9 25.5 35 28.2 35.3 35 40.2 50.3 60

380/415 3 11 12.8 20 11 12.8 20 16.1 20.1 25 23.1 28.9 30

200/230 3 28.3 33.5 50 28.3 33.5 50 28.3 35.3 50 40.2 50.3 50

380/415 3 13.8 16.3 25 13.8 16.3 25 16.1 20.1 20 23.1 28.9 30

Circ1 Circ2

26

8.0 TROUBLESHOOTING

Table 14 Troubleshooting guide

Problem Probable Cause Remedy

Unit will not start No power to unit Check voltage to input circuit breaker.

Control voltage circuit
breaker open

Shut off by external
thermostat or stat is
defective

No cooling Low refrigerant

Unit cycles on
high pressure switch

Heat does not operate No voltage output

charge

Compressor contactor
not pulling in

No output from
thermostat

Loss or restriction of
air flow

Defective fan cycling
control

from thermostat

Fuseable link blown Check for open and replace.

Bad contactor Check for open and replace.

Locate short and reset breaker.

Check operation of thermostat.

Check with gauges.

Check voltage at contactor. If not present refer to print and determine
voltage loss. Check enthalpy sensor for full CCW or D setting.

Check operation of stat. Should have voltage output to Y terminal during
cooling.

Check condenser blower assembly for proper operation. Check for dirty
coil or inlet grille restriction.

Switch should make @ 240 PSIG ±10 (1655 kPa ±68.9). (Check settings
on adjustable switch when supplied.)

Check stat for proper output to W terminal.

Troubleshooting

27

9.0 MAINTENANCE INSPECTION CHECKLIST

Liebert InteleCool2

Date:__________________________ Prepared by:___________________________________

Model #:________________________ Serial #: ______________________________________

Monthly

Filters

___ 1. Unrestricted air flow

___ 2. Check filter

___ 3. Wipe section clean

Fan Section

___ 1. Impellers free of debris

___ 2. Bearings free

Economizer

___ 1. Check damper for tightness and wear

Semiannually

Maintenance Inspection Checklist

Compressor Section

___ 1. Check for leaks

___ 2. Vibration isolation

Air Cooled Condenser

___ 1. Condenser coil clean

___ 2. Motor mount tight

___ 3. Bearings free

___ 4. Refrigerant lines properly supported

Refrigeration Cycle

___ 1. Check suction pressure

___ 2. Check head pressure

___ 3. Check superheat

___ 4. Evaporator coil clean

___ 5. Insulation intact

Electric Panel

___ 1. Check electrical connections

___ 2. Check operational sequences

Notes:

Signature _________________________________________________________

Make photocopies of this form for your records

28

10.0 PARTS

Table 15 Refrigeration system parts, 1.5 and 2 ton units

1.5 Ton 2 Ton

ET017S ET018P ET023S ET023M ET024P ET024Y ET024A

Figure

No.

Run capacitor, recip comp

7-7 Cap. 25μF, 370V C03-005A 1 1 N/A N/A N/A

7-7 Cap. 30μF, 370V 1A19537P1 1 N/A 1 N/A N/A

Run capacitor, scroll comp

7-7 Cap. 30μF, 370V 1A19537P1 1 N/A N/A N/A

7-7 Cap. 40μF, 370V 1A19538P1 1 1 N/A 1 N/A N/A

Compressors, reciprocating

7-5 Comp. 220/240-1 146301P1 1

7-5 Comp. 208/230-1-60 146300P1 1

7-5 Comp. 208/230-1-60 146303P2 1

7-5 Comp. 380/460-3 159147P2 1 1

7-5 Comp. 208/230-1 146303P1 1

7-5 Comp. 200/240-3 159147P1 1

Compressors, scroll

7-6 Comp. 220/240-1 156204P1 1

7-6 Comp. 200/230-1 159146P1 1

7-6 Comp. 220/240-1 138493P2 1

7-6 Comp. 380/460-3 148324P2 1

7-6 Comp. 200/230-1 159145P1 1

7-6 Comp. 208/230-3 159148P1 1

7-6 Comp. 380/460-3 159148P2 1

Pressure switches

High pressure - 400 psi 159482P1 1 1 1 1 1 1 1

Fan cycle switch - 170 psi 159483P1 Optional feature - quantity 1 (as required)

Low pressure - 35 psi 159484P1 Optional feature - quantity 1 (as required)

Adj Pr Sw for Adj FCC P67-0110 Optional feature - quantity 1 (as required)

Filter drier 127185P1 1 1 1 1 1 1 1

7-10 Condenser coil- 1.5/3T 159118P1 1 1 1 1 1 1 1

10-1 Evaporator coil- 1.5/2T 159200P1 1 1 1 1 1 1 1

10-1 Thermal expansion valve-1.5T 1C19507P3 1 1

10-1 Thermal expansion valve-2T 1C19507P1 1 1 1 1 1

Crankcase heaters

7-9 Strap style 240V recips 159202P1 1 1 1 1 1

7-9 Strap style 480V recips 159202P2 1 1

8-1 Well style (recips. only) 1A17648P1 1 1 1 1 1 1 1

8-2 Retainer plug 159136P1 1 1 1 1 1 1 1

15-1 Soft start kit 1C19540P1 Optional feature - quantity 1 (as required)

Part Name/

Description Part #

220-240V

1Ph 50Hz

208-230V

1Ph 60Hz

220-240V

1Ph 50Hz

380-415V

3Ph 50Hz

208-230V

1Ph 60Hz

208-230V

3Ph 60Hz

3Ph 60Hz

Parts

460V

29

Table 16 Refrigeration system parts, 3 ton units

3 Ton

ET035S ET035N ET035M ET036P ET036Y ET036A

Figure

No.

Run capacitor, recip comp

7-7 Cap. 40μF, 370V 1A19538P1 1 N/A N/A 1 N/A N/A

Run capacitor, scroll comp

7-7 Cap. 40μF, 370V 1A19538P1 N/A N/A 1 N/A N/A

7-7 Cap. 50μF, 370V C15-0090 1 N/A N/A N/A N/A

Compressors, reciprocating

7-5 Comp. 220/240-1-50 159124P1 1

7-5 Comp. 200/240-3 159212P2 1 1

7-5 Comp. 380/460-3 159212P3 1 1

7-5 Comp. 200/230-1 159212P1 1

Compressors, scroll

7-6 Comp. 220/240-1 148221P2 1

7-6 Comp. 208/230-3 148325P1 1 1

7-6 Comp. 380/460-3 148325P2 1 1

7-6 Comp. 200/230-1 159149P1 1

Pressure switches

High pressure - 400 psi 159482P1 1 1 1 1 1 1

Fan cycle switch - 170 psi 159483P1 Optional feature—quantity 1 (as required)

Low pressure - 35 psi 159484P1 Optional feature—quantity 1 (as required)

Adj Pr Sw for Adj FCC P67-0110 Optional feature—quantity 1 (as required)

Filter drier 127185P1 1 1 1 1 1 1

7-10 Condenser coil - 1.5/3T 159118P1 1 1 1 1 1 1

10-1 Evaporator coil - 3T 159180P1 1 1 1 1 1 1

10-1 Thermal expansion valve - 3T 1C19507P2 1 1 1 1 1 1

Crankcase Heaters

7-9 Strap style 240V scrolls 132102P1 1 1 1 1

7-9 Strap style 480V scrolls 132102P2 1 1

8-1

Well style (recips. only) 1A17648P1 1 1 1 1 1 1

8-2 Retainer plug 159136P1 1 1 1 1 1 1

15-1 Soft start kit 1C19540P1 Optional feature—quantity 1 (as required)

Part Name /
Description Part #

220-240V
1Ph 50Hz

200-240V
3Ph 50Hz

380-415V
3Ph 50Hz

208-230V

1Ph 60Hz

208-230V
3Ph 60Hz

Parts

460V

3Ph 60Hz

30

Table 17 Refrigeration system parts, 4-ton units

4 Ton

ET047N
ET347N

Figure

No.

Run capacitor, scroll comp

7-7 Cap. 40μF, 370V 1A19538P1 N/A N/A 1 N/A N/A

Compressors, scroll

7-6 Comp. 208/230-3 159153P1 1 1

7-6 Comp. 380/460-3 159153P2 1 1

7-6 Comp. 200/230-1 159152P1 1

Pressure switches

High pressure - 400 psi 159482P1 1 1 1 1 1

Fan cycle switch - 170 psi 159483P1 Optional feature - quantity 1 (as required)

Low Pressure - 35 psi 159484P1 Optional feature - quantity 1 (as required)

Adj Pr Sw for Adj FCC P67-0110 Optional feature - quantity 1 (as required)

Filter drier 128177P1 1 1 1 1 1

7-10 Condenser coil - 4/5T 159235P1 1 1 1 1 1

10-1 Evaporator coil - 4/5T 159237P1 1 1 1 1 1

10-1 Thermal expansion valve - 4T 159264P1 1 1 1 1 1

Crankcase heaters

7-9 Strap style 240V recips 159202P1 1 1 1

7-9 Strap style 480V recips 159202P2 1 1

7-9 Strap style 240V scrolls 132102P1 1 1 1

7-9 Strap style 480V scrolls 132102P2 1 1

15-1 Soft start kit 1C19540P1 Optional feature - quantity 1 (as required)

Part Name/

Description Part #

200-230V
3Ph 50Hz

ET047M
ET347M

380-415V
3Ph 50Hz

ET048P
ET348P

208-230V
1Ph 60Hz

ET048Y
ET348Y

208-230V
3Ph 60Hz

Parts

ET048A
ET348A

460V

3Ph 60Hz

31

Table 18 Refrigeration system parts, 5-ton units

5 Ton

ET059N
ET359N

Figure

No.

Run capacitor, scroll comp

7-7 Cap. 60μF, 370V E13-2430 N/A N/A 1 N/A N/A

Compressors, scroll

7-6 Comp. 200/240-3 132101P2 1 1

7-6 Comp. 380/460-3 132101P3 1 1

7-6 Comp. 200/230-1 132101P1 1

Pressure switches

High pressure - 400 psi 159482P1 1 1 1 1 1

Fan cycle switch - 170 psi 159483P1 Optional feature - quantity 1 (as required)

Low Pressure - 35 psi 159484P1 Optional feature - quantity 1 (as required)

Adj Pr Sw for Adj FCC P67-0110 Optional feature - quantity 1 (as required)

Filter drier 128177P1 1 1 1 1 1

7-10 Condenser coil - 4/5T 159235P1 1 1 1 1 1

10-1 Evaporator coil - 4/5T 159237P1 1 1 1 1 1

10-1 Thermal expansion valve - 5T 159264P2 1 1 1 1 1

Crankcase heaters

7-9 Strap style 240V scrolls 132102P1 1 1 1

7-9 Strap style 480V scrolls 132102P2 1 1

15-1 Soft start kit 1C19540P1 Optional feature - quantity 1 (as required)

Part Name/

Description Part #

200-230V
3Ph 50Hz

ET059M
ET359M

380-415V
3Ph 50Hz

ET060P
ET360P

208-230V

1Ph 60Hz

ET060Y
ET360Y

208-230V

3Ph 60

Parts

ET060A
ET360Y

460V

3Ph 60Hz

32

Table 19 Electric panel, 1.5- and 2-ton units

1.5 Ton 2 Ton

ET017S ET018P ET023S ET023M ET024P ET024Y ET024A

Figure

No.

11-3 Transformer 208/230V 159463P1 1 1 1 1 1

11-3 Transformer 360/460V 159463P2 1 1

Circuit breakers

11-1 No heat 138457P7 138457P3 138457P3 147957P8 138457P3 147957P7 147957P8

11-1 5 kW heat 138457P5 138457P5 138457P5 147957P8 138457P5 147957P7 147957P8

11-1 10 kW heat 138457P2 138457P2 138457P2 147957P1 138457P2 147957P10 147957P1

11-1 15 kW heat N/A N/A N/A N/A N/A N/A N/A

11-1A Heater breaker N/A N/A N/A N/A N/A N/A N/A

Circuit breakers - scrolls

11-1 No heat 138457P3 138457P3 138457P5 147957P8 138457P5 147957P7 147957P8

11-1 5 kW heat 138457P5 138457P5 138457P5 147957P8 138457P5 147957P7 147957P8

11-1 10 kW heat 138457P2 138457P2 138457P2 147957P1 138457P2 147957P10 147957P1

11-1 15 kW heat N/A N/A N/A N/A N/

11-1A Heater breaker N/A N/A N/A N/A N/A N/A N/A

Contactor, compressor

11-4 2 pole E-013A 1 1 1 1

11-4 3 pole 124501P1 1 1 1

Contactor, heater, 5 kW

11-9 2 pole E-013A 1 1 1 1

11-9 3 pole 124501P1 1 1 1

Contactor, heater, 10 kW

11-9 2 pole E-011C 1 1 1 1

11-9 3 pole 124501P1 1 1

11-9 3 pole E-0110 1

11-6 Contactor evaporator fan E-0130 1 1 1 1 1

11-6 Contactor evaporator fan E-013A 1 1

11-7 Contactor, condenser fan E-013A 1 1

11-8 Time delay relay, anticycle 148089P1 1 1 1 1 1 1 1

11-16 Heater interlock relay E03-0170 1 1

11-10 Terminal strip, 10 position 159468P1 1 1 1 1 1 1 1

Wall thermostat, 1 stage 138968P1 1 1 1 1 1 1 1

Thermostat base 138940P1 1 1 1 1 1 1 1

Optional features

11-13 Time delay relay, LP bypass 138491P1 Optional feature - quantity 1 (as required)

11-12 Economizer relay E03-0170 Optional feature - quantity 1 (as required)

11-11 Lockout relay E-0130 Optional feature - quantity 1 (as required)

Common alarm assembly

14-1 Air flow switch B02-0190 Optional feature - quantity 1 (as required)

14-2 T/D relay E-3530 Optional feature - quantity 1 (as required)

14-3 Relay R1 E03-0170 Optional feature - quantity 1 (as required)

14-4 Relay R2 E03-0170 Optional feature - quantity 1 (as required)

14-5 Thermostat E-0230 Optional feature - quantity 1 (as required)

Part Name /
Description Part #

220-240V

1Ph 50Hz

208-230V

1Ph 60Hz

220-240V

1Ph 50Hz

380-415V

3Ph 50Hz

208-230V

1Ph 60Hz

208-230V

3Ph 60Hz

AN/AN/A

3Ph 60Hz

460V

Parts

33

Table 20 Electric panel parts, 3-ton units

3 Ton

ET035S ET035N ET035M ET036P ET036Y ET036A

Figure

No.

11-3 Transformer 208/230V 159463P1 1 1 1 1

11-3 Transformer 360/460V 159463P2 1 1

Circuit breakers

11-1 No heat 138457P1 147957P5 147957P8 138457P8 147957P5 147957P8

11-1 5 kW heat 138457P1 147957P5 147957P8 138457P8 147957P5 147957P8

11-1 10 kW heat 138457P2 147957P10 147957P1 138457P2 147957P10 147957P1

11-1 15 kW heat 138457P2 147957P3 147957P2 138457P2 147957P3 147957P11

11-1A Heater breaker 138457P5 N/A N/A 138457P5 N/A N/A

Circuit breakers - scrolls

11-1 No heat 138457P9 147957P9 147957P8 138457P1 147957P5 147957P8

11-1 5 kW heat 138457P9 147957P9 147957P8 138457P1 147957P5 147957P8

11-1 10 kW heat 138457P2 147957P10 147957P1 138457P2 147957P10 147957P1

11-1 15 kW heat 138457P2 147957P3 147957P2 138457P2 147957P3 147957P11

11-1A Heater breaker 138457P5 N/A N/A 138457P5 N/A N/A

Contactor, compressor

11-4 2 pole E-011B 1 1

11-4 3 pole 124501P1 1 1

11-4 3 pole E-0110 1 1

Contactor, heater, 5 kW

11-9 2 pole E-013A 1 1

11-9 3 pole 124501P1 1 1 1 1

Contactor, heater, 10 kW

11-9 2 pole E-011C 1 1

11-9 3 pole 124501P1 1 1

9 3 pole E-0110 1 1

11-

Contactor, heater, 15 kW

11-15 2 pole E-013A 1 1

11-9 2 pole E-011C 1 1

11-9 3 pole E-0110 1 1

11-9 3 pole E-009F 1 1

11-6 Contactor evaporator fan E-0130 1 1 1 1

11-6 Contactor evaporator fan E-013A 1 1

11-7 Contactor, condenser fan E-013A 1 1

11-8 Time delay relay, anticycle 148089P1 1 1 1 1 1 1

11-16 Heater interlock relay E03-0170 1 1

11-10 Terminal strip, 10 position 159468P1 1 1 1 1 1 1

Wall thermostat, 1 stage 138968P1 1 1 1 1 1 1

Thermostat base 138940P1 1 1 1 1 1 1

Optional features

11-13 Time delay relay, LP bypass 138491P1 Optional feature - quantity 1 (as required)

11-12 Economizer relay E03-0170 Optional feature - quantity 1 (as required)

11-11 Lockout relay E-0130 Optional feature - quantity 1 (as required)

Common alarm assembly

14-1 Air flow switch B02-0190 Optional feature - quantity 1 (as required)

14-2 T/D relay E-3530 Optional feature - quantity 1 (as required)

14-3 Relay R1 E03-0170 Optional feature - quantity 1 (as required)

14-4 Relay R2 E03-0170 Optional feature - quantity 1 (as required)

14-5 Thermostat E-0230 Optional feature - quantity 1 (as required)

Part Name /
Description Part #

220-240V
1Ph 50Hz

200-240V
3Ph 50Hz

380-415V
3Ph 50Hz

208-230V

1Ph 60Hz

208-230V

3Ph 60Hz 3

460V

3Ph 60Hz

Parts

34

Parts

Table 21 Electric panel parts, 4-ton unit

4 Ton

ET047N
ET347N

Figure

No.

11-3 Transformer 208/230V 159463P1 1 1 1

11-3 Transformer 360/460V 159463P2 1 1

Circuit breakers - scrolls

11-1 No heat 147957P10 147957P1 138457P4 147957P10 147957P1

11-1 5 kW heat 147957P10 147957P1 138457P4 147957P10 147957P1

11-1 10 kW heat 147957P10 147957P11 138457P2 147957P10 147957P1

11-1 15 kW heat 147957P6 147957P2 138457P2 147957P6 147957P2

11-1A Heater breaker N/A N/A 138457P5 N/A N/A

Contactor, compressor

11-4 2 pole E-011C 1

11-4 3 pole 124501P1 1 1

11-4 3 pole E-0110 1 1

Contactor, heater, 5 kW

11-9 2 pole E-013A 1 1

11-9 3 pole 124501P1 1 1 1

Contactor, heater, 10 kW

11-9 2 pole E-011C 1 1

11-9 3 pole 124501P1 1 1

11-9 3 pole E-0110 1

Contactor, heater, 15 kW

11-15 2 pole E-013A 1

11-9 2 pole E-011C 1

11-9

11-9 3 pole E-009F 1 1

11-6 Contactor evaporator fan E-0130 1 1 1

11-6 Contactor evaporator fan E-013A 1 1

11-7 Contactor, condenser fan E-013A 1 1

11-8 Time delay relay, anticycle 148089P1 1 1111

11-16 Heater interlock relay E03-0170 1 1

11-10 Terminal strip, 10 position 159468P1 1 1111

11-13 Time delay relay, LP bypass 138491P1 Optional feature - quantity 1 (as required)

11-12 Economizer relay E03-0170 Optional feature - quantity 1 (as required)

11-11 Lockout relay E-0130 Optional feature - quantity 1 (as required)

14-1 Air flow switch B02-0190 Optional feature - quantity 1 (as required)

14-2 T/D relay E-3530 Optional feature - quantity 1 (as required)

14-3 Relay R1 E03-0170 Optional feature - quantity 1 (as required)

14-4 Relay R2 E03-0170 Optional feature - quantity 1 (as required)

14-5 Thermostat E-0230 Optional feature - quantity 1 (as required)

3 pole E-0110 1 1

Wall thermostat, 1 stage 138968P1 1 1111

Thermostat base 138940P1 1 1111

Optional features

Common alarm assembly

Part Name /
Description Part #

200-230V
3Ph 50Hz

ET047M
ET347M

380-415V

3Ph 50Hz

ET048P
ET348P

208-230V
1Ph 60Hz

ET048Y
ET348Y

208-230V
3Ph 60Hz

ET048A
ET348A

460V

3Ph 60Hz

35

Table 22 Electric panel parts, 5-ton unit

5 Ton

ET059N
ET359N

Figure

No.

11-3 Transformer 208/230V 159463P1 1 1 1

11-3 Transformer 360/460V 159463P2 1 1

Circuit breakers - scrolls

11-1 No heat 147957P3 147957P11 138457P2 147957P3 147957P11

11-1 5 kW heat 147957P3 147957P11 138457P2 147957P3 147957P11

11-1 10 kW heat 147957P3 147957P11 138457P2 147957P3 147957P11

11-1 15 kW heat 147957P3 147957P2 138457P2 147957P3 147957P2

11-1A Heater breaker N/A N/A 138457P5 N/A N/A

Contactor, compressor

11-4 2 pole E-011C 1

11-4 3 pole 124501P1 1 1

11-4 3 pole E-0110 1 1

Contactor, heater, 5 kW

11-9 2 pole E-013A 1

11-9 3 pole 124501P1 1 1 1 1

Contactor, heater, 10 kW

11-9 2 pole E-011C 1

11-9 3 pole 124501P1 1 1

11-9 3 pole E-0110 1 1

Contactor, heater, 15 kW

11-15 2 pole E-013A 1

2 pole E-011C 1

11-9

11-9 3 pole E-0110 1 1

11-9 3 pole E-009F 1 1

11-6 Contactor evaporator fan E-0130 1 1 1

11-6 Contactor evaporator fan E-013A 1 1

11-7 Contactor, condenser fan E-013A 1 1

11-8 Time delay relay, anticycle 148089P1 1 1 1 1 1

11-16 Heater interlock relay E-0130 1 1

11-10 Terminal strip, 10 position 159468P1 1 1 1 1 1

Wall thermostat, 1 stage 138968P1 1 1 1 1 1

Thermostat base 138940P1 1 1 1 1 1

Optional features

11-13 Time delay relay, LP bypass 138491P1 Optional feature - quantity 1 (as required)

11-12 Economizer relay E03-0170 Optional feature - quantity 1 (as required)

11-11 Lockout relay E-0130 Optional feature - quantity 1 (as required)

Common alarm assembly

14-1 Air flow switch B02-0190 Optional feature - quantity 1 (as required)

14-2 T/D relay E-3530 Optional feature - quantity 1 (as required)

14-3 Relay R1 E03-0170 Optional feature - quantity 1 (as required)

14-4 Relay R2 E03-0170 Optional feature - quantity 1 (as required)

14-5 Thermostat E-0230 Optional feature - quantity 1 (as required)

Part Name /
Description Part #

200-230V
3Ph 50Hz

ET059M
ET359M

380-415V
3Ph 50Hz

ET060P
ET360P

208-230V

1Ph 60Hz

ET060Y
ET360Y

208-230V

3Ph 60Hz

ET060A
ET360Y

460V

3Ph 60Hz

Parts

36

Table 23 Motor parts, heater, Economizer, 1.5- and 2-ton units

1.5 Ton 2 Ton

ET017S ET018P ET023S ET023M ET024P ET024Y ET024A

Figure

No.

Condenser fan motors

Standard

7-1 Motor 1/8 Hp, 208/230V (std) 159206P1 1 1 1 1 1

7-1 Motor 1/8 Hp, 380/460V (std) 159206P2 1 1

7-2 Fan prop, 2 blade, 20", 28-deg 159189P2 1 1 1 1 1 1 1

High ambient option

7-1 1/5 Hp, 208/230V (high amb) 159205P1 1 1 1 1 1

7-1 1/5 Hp, 380/460V (high amb) 159205P2 1 1

7-2 Fan prop, 4 blade, 20", 22-deg 159112P1 1 1 1 1 1 1 1

7-8 Capacitor, run 5μF, 370V B-1220 1 1 1 1 1 1 1

7-4 Motor mount 159175P1 1 1 1 1 1 1 1

Evaporator fan motors

9-11 Motor 1/4 Hp dual 206/230V 159207P1 1 1 1 1 1

9-11 Motor 1/4 Hp dual 380/460V 159207P2 1 1

9-2 Blower, CW 159201P2 1 1 1 1 1 1 1

9-1 Blower, CCW 159201P1 1 1 1 1 1 1 1

9-3 Capacitor, run 5μF, 370V B-1220 1 1 1 1 1 1 1

9-8 Motor mount 159174P1 1 1 1 1 1 1 1

9-9 Mount bolt 100061 1 1 1 1 1 1 1

9-10 Mount nut S-3380 1 1 1 1 1 1 1

9-4 Grommot washer 127843P1 4 4 4 4 4 4 4

9-5 Screw 147993P1 4 4 4 4 4 4 4

-6 Grommot tube 127843P2 4 4 4 4 4 4 4

9

9-7 Spacing sleeve 127843P3 4 4 4 4 4 4 4

Heaters - optional

12-1 Heater element, 5kW, 240V 159170P1 1 1 1 1 1 1

12-1 Heater element, 5kW, 277V 159170P2 1

12-1 Heater element, 10kW, 240V 159170P3 1 1 1 1 1 1

12-1 Heater element, 10kW, 277V 159170P4 1

12-1 Heater element, 15kW, 240V 159170P5 1 1 1 1 1 1

12-1 Heater element, 15kW, 277V 159170P6 1

12-1 Fuse link, safety 147896P1 3 3 3 3 3 3 3

12-1 Therm switch, safety (5kW) R-013A 1 1 1 1 1 1 1

12-1 Thermswitch, safety (10, 15kW) R-013B 1 1 1 1 1 1 1

12-1 Jumper wire 146807G1 4 4 4 2 4 3 2

Economizer - optional

13-1 Actuator motor, spring return 159115P1 Optional feature - quantity 1 (as required)

13-2 Min position potentiometer 159471P1 Optional feature - quantity 1 (as required)

13-3 Enthalpy control 138401P1 Optional feature - quantity 1 (as required)

13-4 Mixed air sensor 159204P1 Optional feature - quantity 1 (as required)

13-5 Push rod 159137P1 Optional feature - quantity 1 (as required)

13-6 Linkage, ball type 129645P1 Optional feature - quantity 1 (as required)

13-7 Filter, 20%, 2" x 16" x 32.5" 138447P2 1 1 1 1 1 1 1

Part Name/

Description Part #

220-240V

1Ph 50Hz

208-230V

1Ph 60Hz

220-240V

1Ph 50Hz

380-415V

3Ph 50Hz

208-230V

1Ph 60Hz

208-230V

3Ph 60Hz

3Ph 60Hz

Parts

460V

37

Table 24 Motor parts, heater, Economizer, 3-ton units

3 Ton

ET035S ET035N ET035M ET036P ET036Y ET036A

Figure

No.

Condenser fan motors

Standard

7-1 Motor 1/8 Hp, 208/230V (std) 159206P1 1 1 1 1

7-1 Motor 1/8 Hp, 380/460V (std) 159206P2 1 1

7-2 Fan prop, 4 blade, 20", 26-deg 159112P2 1 1 1 1 1 1

High ambient option

7-1 1/5 Hp, 208/230V (high amb) 159205P1 1 1 1 1

7-1 1/5 Hp, 380/460V (high amb) 159205P2 1 1

7-2 Fan prop, 4 blade, 20", 22-deg 159112P1 1 1 1 1 1 1

7-8 Capacitor, run 5μF, 370V B-1220 1 1 1 1 1 1

7-4 Motor mount 159175P1 1 1 1 1 1 1

Evaporator fan motors

9-11 Motor 1/4 Hp dual 206/230V 159207P1 1 1 1 1

9-11 Motor 1/4 Hp dual 380/460V 159207P2 1 1

9-2 Blower, CW 159201P2 1 1 1 1 1 1

9-1 Blower, CCW 159201P1 1 1 1 1 1 1

9-3 Capacitor, run 5μF, 370V B-1220 1 1 1 1 1 1

9-8 Motor mount 159174P1 1 1 1 1 1 1

9-9 Mount bolt 100061 1 1 1 1 1 1

9-10 Mount nut S-3380 1 1 1 1 1 1

9-4 Grommot washer 127843P1 4 4 4 4 4 4

9-5 Screw 147993P1 4 4 4 4 4 4

Grommot tube 127843P2 4 4 4 4 4 4

9-6

9-7 Spacing sleeve 127843P3 4 4 4 4 4 4

Heaters - optional

12-1 Heater element, 5kW, 240V 159170P1 1 1 1 1 1

12-1 Heater element, 5kW, 277V 159170P2 1

12-1 Heater element, 10kW, 240V 159170P3 1 1 1 1 1

12-1 Heater element, 10kW, 277V 159170P4 1

12-1 Heater element, 15kW, 240V 159170P5 1 1 1 1 1

12-1 Heater element, 15kW, 277V 159170P6 1

12-1 Fuse link, safety 147896P1 3 3 3 3 3 3

12-1 Therm switch, safety (5kW) R-013A 1 1 1 1 1 1

12-1 Thermswitch, safety (10,15kW) R-013B 1 1 1 1 1 1

12-1 Jumper wire 146807G1 4 3 2 4 3 2

Economizer - optional

13-1 Actuator motor, spring return 159115P1 Optional feature - quantity 1 (as required)

13-2 Min position potentiometer 159471P1 Optional feature - quantity 1 (as required)

13-3 Enthalpy control 138401P1 Optional feature - quantity 1 (as required)

13-4 Mixed air sensor 159204P1 Optional feature - quantity 1 (as required)

13-5 Push rod 159137P1 Optional feature - quantity 1 (as required)

13-6 Linkage, ball type 129645P1 Optional feature - quantity 1 (as required)

13-7 Filter, 20%, 2" x 16" x 32.5" 138447P2 1 1 1 1 1 1

Part Name/

Description Part #

220-240V
1Ph 50Hz

200-240V
3Ph 50Hz

380-415V
3Ph 50Hz

208-230V

1Ph 60Hz

208-230V

3Ph 60Hz 3

Parts

460V

3Ph 60Hz

38

Table 25 Motor parts, heater, Economizer, 4-ton units

4 Ton

ET047N
ET347N

Figure

No.

Condenser fan motors

Standard

7-1 Motor 1/3 Hp, 200/240V (std) 159266P1 1 1 1

7-1 Motor 1/3 Hp, 380/460V (std) 159266P2 1 1

7-2 Fan prop, 4 blade, 24", 28-deg 159241P2 1 1 1 1 1

High ambient option

7-1 1/2 Hp, 200/240V (high amb) 159265P1 1 1 1

7-1 1/2 Hp, 380/460V (high amb) 159265P2 1 1

7-2 Fan prop, 4 blade, 24", 24-deg 159241P1 1 1 1 1 1

7-8 Capacitor, run 10μF, 370V B03-0030 1 1 1 1 1

7-4 Motor mount 159175P1 1 1 1 1 1

Evaporator fan motors

9-11 Motor 1/2 Hp dual 200/230V 159267P1 1 1 1

9-11 Motor 1/2 Hp dual 380/460V 159267P2 1 1

9-2 Blower, CW 159254P2 1 1 1 1 1

9-1 Blower, CW 159254P1 1 1 1 1 1

9-3 Capacitor, run 10μF, 370V B03-0030 1 1 1 1 1

9-8 Motor mount 159263P1 1 1 1 1 1

9-9 Mount bolt 100061 1 1 1 1 1

9-10 Mount nut S-3380 1 1 1 1 1

9-4 Grommot washer 127843P1 6 6 6 6 6

9-5 Screw 147993P1 6 6 6 6 6

9-6 Grommot tube 127843P2 6 6 6 6 6

9-7 Spacing sleeve 127843P3 6 6 6 6 6

Heaters - optional

12-1 Heater element, 5kW, 240V 159170P1 1 1 1 1

12-1 Heater element, 5kW, 277V 159170P2 1

12-1 Heater element, 10kW, 240V 159170P3 1 1 1 1

12-1 Heater element, 10kW, 277V 159170P4 1

12-1 Heater element, 15kW, 240V 159170P5 1 1 1 1

12-1 Heater element, 15kW, 277V 159170P6 1

12-1 Fuse link, safety 147896P1 3 3 3 3 3

12-1 Therm switch, safety (5kW) R-013A 1 1 1 1 1

12-1 Therm switch, safety (10,15kW) R-013B 1 1 1 1 1

12-1 Jumper wire 146807G1 3 2 4 3 2

Economizer - optional

13-1 Actuator motor, spring return 159115P1 Optional feature - quantity 1 (as required)

13-2 Min position potentiometer 159471P1 Optional feature - quantity 1 (as required)

13-3 Enthalpy control 138401P1 Optional feature - quantity 1 (as required)

13-4 Mixed air sensor 159204P1 Optional feature - quantity 1 (as required)

13-5 Push rod 159137P1 Optional feature - quantity 1 (as required)

13-6 Linkage, ball type 129645P1 Optional feature - quantity 1 (as required)

13-7 Filter, 20%, 2" x 21" x 36.25" 138447P3 1 1 1 1 1

Part Name/

Description Part #

200-230V
3Ph 50Hz

ET047M
ET347M

380-415V

3Ph 50Hz

ET048P
ET348P

208-230V
1Ph 60Hz

ET048Y
ET348Y

208-230V
3Ph 60Hz

Parts

ET048A
ET348A

460V

3Ph 60Hz

39

Table 26 Motor parts, heater, Economizer, 5-ton units

5 Ton

ET059N
ET359N

Figure

No.

Condenser fan motors

Standard

7-1 Motor 1/3 Hp, 200/240V (std) 159266P1 1 1 1

7-1 Motor 1/3 Hp, 380/460V (std) 159266P2 1 1

7-2 Fan prop, 4 blade, 24", 28-deg 159241P2 1 1 1 1 1

High ambient option

7-1 1/2 Hp, 200/240V (high amb) 159265P1 1 1 1

7-1 1/2 Hp, 380/460V (high amb) 159265P2 1 1

7-2 Fan prop, 4 blade, 24", 24-deg 159241P1 1 1 1 1 1

7-8 Capacitor, run 10μF, 370V B03-0030 1 1 1 1 1

7-4 Motor mount 159175P1 1 1 1 1 1

Evaporator fan motors

9-11 Motor 1/2 Hp dual 200/230V 159267P1 1 1 1

9-11 Motor 1/2 Hp dual 380/460V 159267P2 1 1

9-2 Blower, CW 159254P2 1 1 1 1 1

9-1 Blower, CW 159254P1 1 1 1 1 1

9-3 Capacitor, run 10μF, 370V B03-0030 1 1 1 1 1

9-8 Motor mount 159263P1 1 1 1 1 1

9-9 Mount bolt 100061 1 1 1 1 1

9-10 Mount nut S-3380 1 1 1 1 1

9-4 Grommot washer 127843P1 6 6 6 6 6

9-5 Screw 147993P1 6 6 6 6 6

9-6 Grommot tube 127843P2 6 6 6 6 6

9-7 Spacing sleeve 127843P3 6 6 6 6 6

Heaters - optional

12-1 Heater element, 5kW, 240V 159170P1 1 1 1 1

12-1 Heater element, 5kW, 277V 159170P2 1

12-1 Heater element, 10kW, 240V 159170P3 1 1 1 1

12-1 Heater element, 10kW, 277V 159170P4 1

12-1 Heater element, 15kW, 240V 159170P5 1 1 1 1

12-1 Heater element, 15kW, 277V 159170P6 1

12-1 Fuse link, safety 147896P1 3 3 3 3 3

12-1 Therm switch, safety (5kW) R-013A 1 1 1 1 1

12-1 Therm switch, safety (10,15kW) R-013B 1 1 1 1 1

12-1 Jumper wire 146807G1 3 2 4 3 2

Economizer - optional

13-1 Actuator motor, spring return 159115P1 Optional feature - quantity 1 (as required)

13-2 Min position potentiometer 159471P1 Optional feature - quantity 1 (as required)

13-3 Enthalpy control 138401P1 Optional feature - quantity 1 (as required)

13-4 Mixed air sensor 159204P1 Optional feature - quantity 1 (as required)

13-5 Push rod 159137P1 Optional feature - quantity 1 (as required)

13-6 Linkage, ball type 129645P1 Optional feature - quantity 1 (as required)

13-7 Filter, 20%, 2" x 21" x 36.25" 138447P3 1 1 1 1 1

Part Name/

Description Part #

200-230V
3Ph 50Hz

ET059M
ET359M

380-415V
3Ph 50Hz

ET060P
ET360P

208-230V

1Ph 60Hz

ET060Y
ET360Y

208-230V

3Ph 60

Parts

ET060A
ET360Y

460V

3Ph 60Hz

40

Figure 7 Condenser/ piping assembly

3

7

2

4

Parts

10

8

5

1

Figure 8 Crankcase heater (reciprocating compressor only)

9

6

Compressor

2

Retainer

1

Crankcase
heater
cartridge

41

Figure 9 Evaporator blower

3

Parts

12

Figure 10 Evaporator coil and expansion valve

1

4

2

7

6

5

8910

11

1

2

TEV systems

42

Figure 11 Electric panels

11

8

3

31

13

12

16

Parts

7

6

15

4

380/460V, 3 phase

10

11

3

3

31

11

31

13

8

12

6

10

13

8

12

6

Evaporator “MF”

15

1

4

9

4

1A

200/240V, 3 phase

1

200/240V, 1 phase

10

1

43

Figure 12 Heater assembly

5kW &10kW

208/230V, 1 phase

(Parallel)

Connection

15kW

208/230V, 1 phase

(Parallel)

Connection

5kW, 10kW & 15kW

208/230V, 3 phase

(Delta)

Connection

Parts

5kW, 10kW & 15kW

380/460V, 3 phase

(Wye)

Connection

159171G1 & G2,

G13 & G14

159171G3 & G15 159171G4, G5 &G6

G16, G17 & G18

159171G7, G8, G10, G11& G12

G19, G20, G21, G22, G23& G24

1

44

Figure 13 Economizer assembly

4

1

2

3

Parts

7

5

6

Figure 14 Common alarm assembly

5

4

2

3

1

45

Figure 15 Soft start device

Parts

To compressor
capacitor

1

46

Notes

Parts

47

Parts

48

Ensuring The High Availability
0f Mission-Critical Data And Applications.

Emerson Network Power, the global leader in enabling business-critical
continuity, ensures network resiliency and adaptability through
a family of technologies—including Liebert power and cooling
technologies—that protect and support business-critical systems.
Liebert solutions employ an adaptive architecture that responds
to changes in criticality, density and capacity. Enterprises benefit
from greater IT system availability, operational flexibility and
reduced capital equipment and operating costs.

While every precaution has been taken to ensure the accuracy
and completeness of this literature, Liebert Corporation assumes no
responsibility and disclaims all liability for damages resulting from use of
this information or for any errors or omissions.
© 2006 Liebert Corporation
All rights reserved throughout the world. Specifications subject to change
without notice.
® Liebert and the Liebert logo are registered trademarks of Liebert
Corporation. All names referred to are trademarks
or registered trademarks of their respective owners.

Technical Support / Service

Web Site

www.liebert.com

Monitoring

800-222-5877

[e-mail]

Outside the US: 614-841-6755

Single-Phase UPS

800-222-5877

[e-mail]

Outside the US: 614-841-6755

Three-Phase UPS

800-543-2378

[e-mail]

Environmental Systems

800-543-2778

Outside the United States

614-888-0246

Locations

United States

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P.O. Box 29186

Columbus, OH 43229

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Zona Industriale Tognana

35028 Piove Di Sacco (PD) Italy

[phone]

Fax: [phone]

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108 Gloucester Road, Wanchai

Hong Kong

852 2572220

Fax: [phone]

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