Carrier 48TC Instruction Manual download pdf (Page 2)

Smoke Detector/Fire Shutdown (FSD) 36.........

Connecting Discrete Inputs 36..................

Communication Wiring -- Protocols 37............

General 37.................................

Local Access 38..............................

RTU Open Troubleshooting 38.................

Outdoor Air Enthalpy Control 39.................

Differential Enthalpy Control 39................

Return Air Enthalpy Sensor 40.................

Smoke Detectors 40...........................

System 40..................................

Controller 40...............................

Sensor Module 40...........................

Smoke Detector Locations 41....................

Supply Air 41...............................

Return Air without Economizer 41..............

Return Air with Economizer 41.................

Step 13 -- Adjust Factory--Installed Options 46........

Step 14 -- Install Accessories 46...................

SAFETY CONSIDERATIONS

Improper installation, adjustment, alteration, service,

maintenance, or use can cause explosion, fire, electrical

shock or other conditions which may cause personal

injury or property damage. Consult a qualified installer,

service agency, or your distributor or branch for

information or assistance. The qualified installer or

agency must use factory--authorized kits or accessories

when modifying this product. Refer to the individual

instructions packaged with the kits or accessories when

installing.

Follow all safety codes. Wear safety glasses and work

gloves. Use quenching cloths for brazing operations and

have a fire extinguisher available. Read these instructions

thoroughly and follow all warnings or cautions attached to

the unit. Consult local building codes and appropriate

national electrical codes (in USA, ANSI/NFPA70,

National Electrical Code (NEC); in Canada, CSA C22.1)

for special requirements.

It is important to recognize safety information. This is the

safety--alert symbol

. When you see this symbol on the

unit and in instructions or manuals, be alert to the

potential for personal injury.

Understand the signal words DANGER, WARNING,

CAUTION, and NOTE. These words are used with the

safety--alert symbol. DANGER identifies the most serious

hazards which will result in severe personal injury or

death. WARNING signifies hazards which could result in

personal injury or death. CAUTION is used to identify

unsafe practices, which may result in minor personal

injury or product and property damage. NOTE is used to

highlight suggestions which will result in enhanced

installation, reliability, or operation.

FIRE, EXPLOSION HAZARD

Failure to follow this warning could result in personal

injury or death.

Disconnect gas piping from unit when leak testing at

pressure greater than 0.5 psig (3450 Pa). Pressures

greater than 0.5 psig (3450 Pa) will cause gas valve

damage resulting in hazardous condition. If gas valve

is subjected to pressure greater than 0.5 psig (3450

Pa), it must be replaced before use. When pressure

testing field--supplied gas piping at pressures of 0.5

psig (3450 Pa) or less, a unit connected to such piping

must be isolated by closing the manual gas valve.

WARNING

ELECTRICAL SHOCK HAZARD

Failure to follow this warning could cause personal

injury or death.

Before performing service or maintenance operations

on unit, always turn off main power switch to unit and

install lock(s) and lockout tag(s). Unit may have more

than one power switch.

WARNING

UNIT OPERATION AND SAFETY HAZARD

Failure to follow this warning could cause personal

injury, death and/or equipment damage.

Puronr (R--410A) refrigerant systems operate at

higher pressures than standard R--22 systems. Do not

use R--22 service equipment or components on Puron

refrigerant equipment.

WARNING

PERSONAL INJURY AND ENVIRONMENTAL

HAZARD

Failure to follow this warning could cause personal

injury or death.

Relieve pressure and recover all refrigerant before

system repair or final unit disposal.

Ware safety glasses and gloves when handling

refrigerants. Keep torches and other ignition sources

away from refrigerants and oils.

WARNING

CUT HAZARD

Failure to follow this caution may result in personal

injury.

Sheet metal parts may have sharp edges or burrs. Use

care and wear appropriate protective clothing, safety

glasses and gloves when handling parts and servicing

air conditioning equipment.

CAUTION

48TC

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Carrier 48TC Instruction Manual Page 2

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