Trane SCIH User Manual

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Installation, Operation, and Maintenance

Integral Air-Cooled Self-Contained Unit

Model SCIH

“AO” and later design sequence

September 2007

SXIH-SVX01B-EN

general information

About This Manual Literature Change History

Use this manual for Integral Air-Cooled units, model SCIH. This is the second issue of this manual, which includes the addition of the accessory model number and instructions on how to convert the unit to a horizontal discharge with correct belt sizes. Also, it provides specific installation, operation, and maintenance instructions for “AO” and later design sequences.

Note: The procedures discussed in this manual should only be performed by qualified, experienced HVAC technicians.

Note: This document is customer property and must be retained by the unit’s owner for use by maintenance personnel.

Overview of Manual

This booklet describes proper installation, start-up, operation, and maintenance procedures for the Integral Air-Cooled unit, model SCIH. Carefully review the information within this manual and follow the instructions to minimize the risk of improper operation and/or component damage.

Note: One copy of this manual ships inside the control panel of each unit.

It is important that you perform periodic maintenance to help ensure trouble free operation. Should equipment failure occur, contact a qualified Trane service organization for an experienced HVAC technician to properly diagnose and repair this equipment.

Note: Do not release refrigerant to the atmosphere!

If adding or removing refrigerant is required, the service technician must comply with all federal, state, and local laws.

_________________________________________________________

Warnings and Cautions

Warnings and cautions appear at appropriate sections throughout this manual. Read these carefully.

WARNING

Indicates a potentially hazardous situation, which could result in death or serious injury if not avoided.

CAUTION

Indicates a potentially hazardous situation which, if not avoided, may result in minor or moderate injury. It may also be used to alert against unsafe practices.

CAUTION

Indicates a situation that may result in equipment or property-damage-only accidents.

Sample Warnings and Cautions

WARNING

Hazardous voltage!

Disconnect all electric power, including remote disconnects before servicing. Follow proper lockout/ tagout procedures to ensure the power can not be inadvertently energized. Failure to disconnect power before servicing could result in death or serious injury.

CAUTION

Use copper conductors only!

Unit terminals are not designed to accept other types of conductors. Failure to use copper conductors may result in equipment damage.

Common HVAC Acronyms

For convenience, a number of acronyms and abbreviations are used throughout this manual. These acronyms are alphabetically listed and defined below.

cfm = cubic-feet-per-minute CKT. = circuit CV = constant volume CW = clockwise CCW = counterclockwise E/A = exhaust air F/A = fresh air IOM= installation/operation/maintenance manual LH = left-hand O/A = outside air psig = pounds-per-square-inch, gauge pressure R/A = return air RH = right-hand RPM = revolutions-per-minute S/A = supply air SZ = sngle-zone (unit airflow) VAV = variable air volume

Special Note on Refrigeration Emissions

World environmental scientists have concluded that ozone in our upper atmosphere is being reduced due to the release of CFC fully halogenated compounds.Trane urges all HVAC service personnel to make every effort to prevent any refrigerant emissions while installing, operating, or servicing equipment. Always conserve refrigerant for continued use and follow all warnings and cautions in this manual.

contents

Cross reference to related publications:

• Integral Air-Cooled Self-Contained Product Catalog, PKG-PRC009-EN

Installation ……………………………………………………………2

general information ……………………………………………2 pre-installation considerations ………………………………7 dimensions and weights ……………………………………8 mechanical requirements ……………………………………12 electrical requirements ………………………………………13 installation procedure ………………………………………15 pre-startup requirements ……………………………………19 startup …………………………………………………………20

Operation ……………………………………………………………21

sequence of operation ………………………………………21

Maintenance…………………………………………………………22

general information …………………………………………22 maintenance procedures ……………………………………23 periodic checklists ……………………………………………26

SXIH-SVX01B-EN 3

general

Installation

information

Integral Air-Cooled Model Number Description

Following is a complete description of the integral air-cooled unit model number. Each digit in the model number has a corresponding code that identifies specific unit options.

S C I H 0 7 5 3 1 A 0 1 0 1 0 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16

Digit 1 - Unit Model

S = self contained

Digit 2 - Unit Type

C = commercial

Digit 3 - Condenser Medium

I = integral air-cooled

Digit 4 - Development Sequence

H = development series

Digit 5, 6, 7- Unit Nominal Capacity

050 = 5 tons 075 = 7.5 tons 100 = 10 tons 150 = 15 tons

Digit 8 - Unit Voltage

3 = 208 - 230 volt/60 hz/3 ph 4 = 460 volt/60 hz/3 ph 5 = 575 volt/60 hz/3 ph

Digit 9 - Air Flow Configuration

1 = horizontal discharge / rear return 2 = vertical discharge / front return 3 = vertical discharge / rear return

Digit 10, 11 - Design Sequence

A0 = design sequence

Digit 12 - Air Filter Type

1 = one-inch fiberglass throwaway

Digit 13 - Control

0 = control interface

Digit 14 - Unit Finish

1 = painted 2 = coated finish only

Digit 15 - Coil Finish

0 = none C = condenser coated E = evaporator coated H = condenser + evaporator coated

Digit 16 - Agency Listing

A = C ETL listing

4 SXIH-SVX01B-EN

general

Installation

information

Accessory Model Number Description

Following is a complete description of the integral air-cooled accessory model number. Each digit in the model number has a corresponding code that identifies specific unit options.

P V I H A A 1 1 1 A0 A 0 1 1 1 2 3 4 5 6 7 8 9 10 11 12 13 14

Digit 1 - Parts/Accessories

P = parts/accessories

Digit 2 - Unit Model

V = vertical self contained

Digit 3 - Condenser Medium

I = integral air-cooled

Digit 4 - Development Sequence

H = development sequence

Digit 5 - Thermostat

0 = none A = 10/15 ton t-stat 2C w/auto base D = 10/15 ton prg. t-stat 2H2C w/2H2C

base E = 10/14 ton t-stat 2H2C w/auto base F = 10/15 ton t-stat 2H2C w/auto/mnl

base G = 10/15 ton t-stat 2H2C w/mnl base H = 5/7.5 tonprg t-stat 2H2C w/mnl base J = 5/7.5 ton t-stat 1H1C base K = 5/7.5 ton t-stat 1H1C w/auto/mnl

base L = 5/7.5 ton t-stat 1H1C w/mnl base

Digit 6 - Remote Wall Sensor

0 = none A = remote wall sensor

Digit 7 - Heat Coil

0 = none 1 = 5-ton hot water coil 2 = 7.5-ton hot water coil 3 = 10/15-ton hot water coil 4 = 5-ton steam coil 5 = 7.5-ton steam coil 6 = 10/15-ton steam coil

Digit 8 - Discharge Plenum

0 = none 1 = 5-ton plenum 2 = 7.5-ton plenum 3 = 10-ton plenum 4 = 15-ton plenum

Digit 9 - Low Ambient Damper

0 = none 1 = 5/7.5-ton low ambient damper 2 = 10/15-ton low ambient damper

Digit 10 - Design Sequence

** = factory assigned

Digit 11 - Oversize Motor Condenser

0 = none A = 5-ton, 208V condenser, OS motor kit B = 7.5-ton, 208V condenser, OS motor C = 10-ton, 208V condenser, OS motor D = 15-ton, 208V condenser, OS motor E = 5-ton, 460V condenser, OS motor F = 7.5-ton, 460V condenser, OS motor G = 10-ton, 460V condenser, OS motor H = 15-ton, 460V condenser, OS motor J = 5-ton, 575V condenser, OS motor K = 7.5-ton, 575V condenser, OS motor L = 10-ton, 575V condenser, OS motor M = 15-ton, 575V condenser, OS motor

Digit 12 - Oversize Motor Evaporator

0 = none A = 5-ton, 208V evaporator, OS motor B = 7.5-ton, 208V evaporator, OS motor C = 10-ton, 208V evaporator, OS motor D = 15-ton, 208V evaporator, OS motor E = 5-ton, 460V evaporator, OS motor

F = 7.5-ton, 460V evaporator, OS motor G = 10-ton, 460V evaporator, OS motor H = 15-ton, 460V evaporator, OS motor J = 5-ton, 575V evaporator, OS motor K = 7.5-ton, 575V evaporator, OS motor L = 10-ton, 575V evaporator, OS motor M = 15-ton, 575V evaporator, OS motor

Digit 13 - Filter

0 = none 1 = 5-ton 1” fiberglass TA, 6PC 2 = 5-ton 2” fiberglass TA, 6PC 3 = 5-ton 2” mesh filter washable, 6PC 4 = 7.5-ton 1” fiberglass TA, 6PC 5 = 7.5-ton 2” fiberglass TA, 6PC 6 = 7.5-ton 2” mesh filter washable,

6PC 7 = 10/15-ton 1” fiberglass TA, 6PC 8 = 10/15-ton 2” fiberglass TA, 6PC 9 = 10/15-ton 2” mesh filter washable,

6PC

Digit 14 - Filter Rack Kit

0 = none A = 5-ton filter rack kit B = 7.5-ton filter rack kit C = 10-ton filter rack kit D = 15-ton filter rack kit

SXIH-SVX01B-EN 5

general

Installation

General Information

The integral air-cooled unit, model SCIH, is a high efficiency, vertical air cooled air conditioner. Units have either front or top discharge configuration options and easy service access. Unit construction is heavy gage steel with a baked enamel finish. Available unit voltages are 208/3/60, 230/3/60, and 460/3/60, 575/3/60.

Refrigeration Circuits

Units are configured in single or double refrigeration circuits. Each circuit consists of a:

• high efficiency scroll compressor mounted on rubber isolation grommets

• condenser and evaporator coils, designed for optimum performance and efficiency with lanced fins and rifled tubing,

• and filter-drier.

Evaporator Section

The evaporator fan section consists of one or two forward curved centrifugal fans powered by a premium efficiency motor through an adjustable motor sheave, and fixed diameter blower pulley. The condenser fan section consists of one or two forward curved centrifugal fans powered by a premium efficiency motor through an adjustable motor sheave and fixed diameter blower pulley. Condenser motor belt tension is adjusted by an adjustable motor mounting base.

information

Control box access is from the front of the unit to ease electrical hook-up.

Controls

The standard control panel consists of a high voltage terminal block, overload relays for each fan motor, transformer, 3pole 24 volt contactors for each motor and compressor, and a 5-second delay timer. Remote thermostat controls are field-installed.

Field Installed Accessories

These items ship separately for field installation:

• steam coil

• hot water coil

• plenum

• low ambient damper

• oversized motors

• remote thermostat

Note: Application of the above options and/or accessories may require field adjustment of fan speeds to ensure proper airflow and performance.

Unit Nameplate

The unit nameplate identifies the unit model number, appropriate service literature, and wiring diagram numbers. It is mounted on the control panel door. Reference this information when making inquires or ordering parts or literature.

6 SXIH-SVX01B-EN

Installation

pre-installation considerations

Pre-Installation Considerations

Checklist

The following checklist gives an overview of the recommended pre-installation considerations. Follow the procedures in this section to ensure installation is complete and adequate for proper unit operation. Verify this checklist is complete before beginning unit installation.

Verify the unit size and tagging with the



unit nameplate to ensure the correct unit is received.

Inspect the unit for possible shipping



damage and make any necessary claims with the freight delivery company immediately.

Before installing the unit, remember to



allow minimum recommended clearances for routine maintenance and service. Refer to unit dimensions and clearances on submittals or in the Dimensions and Weights section.

Verify the unit is configured properly



prior to beginning unit installation.

Make proper acoustic considerations



before installing unit. Do not install unit near sound-senstive locations.

Allow adequate space for service and



operating clearances. Reference “Service Access” section on this page.

Make provisions for correct supply



power and note electrical connection knockouts locations on the unit submittals or in the Dimensions and Weights section.

Ensure the unit installation location is



level.

Receiving and Handling

Shipping Package

Integral air-cooled units ship assembled on skids. Units ship in the unitary configuration, assembled, piped, and charged with refrigerant.

Receiving Checklist

Complete the following checklist immediately after receiving unit shipment to detect possible shipping damage.

Verify that the unit nameplate data



corresponds to the sales order and bill of lading (including electrical data).

Visually inspect the unit exterior for



physical signs of shipping damage or material shortages.

If a unit appears damaged, inspect it



immediately before accepting the shipment. Remove access panels and check for interior component damage. Make specific notations concerning the damage on the freight bill. Do not refuse delivery.

Report concealed damage to the



freight line within the allotted time after delivery. Verify with the carrier their allotted time to submit a claim.

Note: Failure to follow these procedures may result in no reimbursement for damages from the freight company.

 Do not move damaged material from

the receiving location. It is the receiver’s responsibility to provide reasonable evidence that concealed damage did not occur after delivery.

Do not continue unpacking the



shipment if it appears damaged. Retain all packaging. Take photos of damaged material if possible.

Notify the carrier’s terminal of the



damage immediately by phone and mail. Request an immediate joint inspection of the damage by the carrier and consignee.

Notify your Trane representative of



the damage and arrange for repair. Have the carrier inspect the damage before making any repairs to the unit.

Unit Storage

Take precautions to prevent condensate from forming inside the unit’s electrical compartments and motors if the unit is stored before it is installed.

Service Access

Maintain adequate clearances around and above the unit to ensure proper unit operation and allow sufficient service access. Trane recommends 36-inches service access on all sides of the unit.

WARNING

Hazardous voltage!

Acoustic Considerations

Before determining the final unit installation site, remember that proper unit placement is critical in reducing transmitting sound levels to the building. The ideal time to make provisions to reduce sound transmissions is during the design phase. The most economical means of avoiding a potential acoustical problem is to place units in areas that are not acoustically sensitive.

Unit Location

Install the unit in a dry, indoor area between 50 and 115°F. Choose a location where sound levels, airflow and vibration, commonly associated with heavy-duty commercial equipment, will not be objectionable to occupants. In multiple unit installations, separate the individual units and stagger their location from floor to floor so as not to starve units for air and not to discharge warm condenser air from one condenser into the intake of another condenser. Place thermostats, air supplies and returns so that the individual unit will operate within its zone.

Installation Preparation

Before installing the unit, perform the following procedures to ensure proper unit operation.

1. Verify the installation location is level.

To ensure proper unit operation, install the unit level (zero tolerance) in both horizontal axes. Failure to level the unit properly can result in condensate management problems, such as standing water inside the unit. Standing water and wet surfaces inside units can result in microbial growth (mold) in the drain pan that may cause unpleasant odors and serious health-related indoor air quality problem.

2. Allow adequate service and code

clearances as recommended in the Service Access section.

3. Position the unit in its final location.

Unit Placement

Install the unit on a firm, level surface.

Installing Optional Accessories

Before installing ductwork, install accessories on unit.

SXIH-SVX01B-EN 7

dimensions

Model SCIH 5 & 7.5-ton units

31.50

RETURN AIR

CONDENSER DISCHARGE

CONDENSER RETURN

SIDE ACCESS

13.64

SUPPLY AIR

2.74

SUPPLY AIR

Installation

BC15.43

24.90

74.80

and weights

24.90

0.75

74.80

34.25

18.86

CONDENSER COIL

side view

Model SCIH 10 & 15-ton units

31.50

13.64

SUPPLY AIR

RETURN AIR

CONDENSER DISCHARGE

CONDENSER RETURN

SIDE ACCESS

2.74

SUPPLY AIR

74.80

24.90

2.76

22.70 15.20

COMPRESSOR ACCESS

FORKLIFT ACCESS

front view

2.76

back view

SCIH Unit Dimensions & Weights, in-lbs.

Unit Size A B C D E Wgt. Wgt.

5 ton 42.72 9.29 17.99 8.15 15.70 864 798

7.5 ton 56.69 20.63 20.63 18.92 18.92 960 881 10 ton — — — — — 1333 1241 15 ton — — — — — 1480 1388

85.83

10.03

15.20

GRILL

CONTROLS

16.67

0.75

ACCESS

34.25

Ship. Oper.

18.86 14.77 18.86

CONDENSER COIL

side view

2.68

FORKLIFT ACCESS

front view

back view

8 SXIH-SVX01B-EN

dimensions

SCIH Component Overview

Installation

supply airflow

outlet

and weights

water coil

vent

airflow

inlet

filter frame

airflow

low ambient damper

airflow

back of unit

SXIH-SVX01B-EN 9

+ 20 hidden pages