Elta T210 Specifications download pdf (Page 2)

CONTENTS (cont)

Page

TROUBLESHOOTING ........................108-115

Complete Unit Stoppage.........................108

Single Circuit Stoppage .........................108

Service Analysis ................................108

Restart Procedure...............................108

Thermistor Troubleshooting .....................108

Transducer Troubleshooting .....................108

APPENDIX A — CCN TABLES ................116-139

CONTROLS SETUP CHECKLIST AND

CONFIGURATION LOG

................CL-1toCL-8

UNIT START-UP CHECKLIST ...................CL-10

SAFETY CONSIDERATIONS

Installation and servicing of air-conditioning equipment can

be hazardous due to system pressure and electrical compo-

nents. Only trained and qualified service personnel should in-

stall, repair, or service air-conditioning equipment. Untrained

personnel can perform the basic maintenance functions of re-

placing filters. Trained service personnel should perform all

other operations.

When working on air-conditioning equipment, observe pre-

cautions in the literature, tags and labels attached to the unit,

and other safety precautions that may apply. Follow all safety

codes. Wear safety glasses and work gloves. Use quenching

cloth for unbrazing operations. Have fire extinguishers avail-

able for all brazing operations.

GENERAL

This book contains Start-Up, Controls, Operation, Trouble-

shooting and Service information for the 48/50A series

rooftop units. See Table 1. These units are equipped with

ComfortLink™ controls.

Table 1 — A Series Product Line

LEGEND

The A series units provide ventilation, cooling, and heating

(when equipped) in Variable Air Volume (VAV), Variable Vol-

ume and Temperature (VVT®), and Constant Volume (CV)

applications. The 48AJ,AK,AW,AY and 50AJ,AK,AW,AY

units contain the factory-installed ComfortLink™ Control Sys-

tem which provides full system management. The Main Base

Board (MBB) stores hundreds of unit configuration settings and

8 time of day schedules. The MBB also performs self diagnostic

tests at unit start-up, monitors the operation of the unit, and pro-

vides alarms and alert information. The system also contains

other optional boards that are connected to the MBB through

the Local Equipment Network (LEN). Information on system

operation and status are sent to the MBB processor by various

sensors and optional boards that are located at the unit. Access

to the unit controls for configuration, set point selection, sched-

ule creation, and service can be done through a unit-mounted

Scrolling Marquee. Access can also be done through the Carrier

Comfort Network using the ComfortVIEW™ or the accessory

Navigator hand-held display.

The ComfortLink system controls all aspects of the rooftop.

It controls the supply-fan motor, compressors, and economiz-

ers to maintain the proper temperature conditions. The controls

also cycle condenser fans to maintain suitable head pressure.

All VAV units are equipped with a standard VFD (variable fre-

quency drive) for supply fan speed control and supply duct

pressure control. The ComfortLink control directly controls the

speed of the VFD based on a static pressure sensor input. In ad-

dition the ComfortLink control can adjust the building pressure

using multiple power exhaust fans controlled from damper po-

sition or from a building pressure sensor. The control safeties

are continuously monitored to prevent the unit from operating

under abnormal conditions. Sensors include suction pressure

transducers and saturated condensing temperature sensors

which allow for display of units operational pressures and satu-

ration temperatures.

A scheduling function, programmed by the user, controls

the unit occupied/unoccupied schedule. Up to 8 different

schedules can be programmed.

The controls also allow the service person to operate a quick

test so that all the controlled components can be checked for

proper operation.

Before performing service or maintenance operation on

unit turn off and lock off main power switch to unit.

Electrical shock can cause personal injury and death.

Shut off all power to this equipment during installation

and service. The unit may have an internal non-fused

disconnect or a field-installed disconnect. Note that the

unit may also be equipped with a convenience outlet,

that this outlet is wired to the line side of the unit

mounted disconnect and will remain hot when the

disconnect in the unit is off. There is a separate fuse/

disconnect for the convenience outlet.

This unit uses a microprocessor-based electronic control

system. Do not use jumpers or other tools to short out com-

ponents or to bypass or otherwise depart from recom-

mended procedures. Any short-to-ground of the control

board or accompanying wiring may destroy the electronic

modules or electrical components.

1. Improper Installation, adjustment, alteration, service, or

maintenance can cause property damage, personal inju-

ry, or loss of life. Refer to the User’s Information Manu-

al provided with this unit for more details.

2. Do not store or use gasoline or other flammable vapors

and liquids in the vicinity of this or any other appliance.

What to do if you smell gas:

1. DO NOT try to light any appliance.

2. DO NOT touch any electrical switch, or use any phone

in your building.

3. IMMEDIATELY call your gas supplier from a neigh-

bor’s phone. Follow the gas supplier’s instructions.

4. If you cannot reach your gas supplier call the fire

department.

UNIT APPLICATION

48AJ CV Unit with Gas Heat, Vertical Supply

48AK VAV Units with Gas Heat, Horizontal Supply

48AW CV Unit with Gas Heat, Vertical Supply

48AY VAV Unit with Gas Heat, Horizontal Supply

50AJ CV Unit with Optional Electric Heat, Vertical Supply

50AK VAV Units with Optional Electric Heat, Horizontal Supply

50AW CV Unit with Optional Electric Heat, Vertical Supply

50AY VAV Unit with Optional Electric Heat, Horizontal Supply

CV — Constant Volume

VAV — Variable Air Volume

IMPORTANT: This literature contains start-up, controls,

operation, troubleshooting and service information for the

48/50A series product. Use this guide in conjunction with

the separate installation instructions packaged with the

unit. Refer to the Wiring Diagrams literature for more

detailed wiring information.

1 2 3 4 5 6 7 ... 149 150

Comments to this Manuals

No comments

Elta T210 Specifications Page 2

Comments to this Manuals

Related products and manuals for Egg cookers Elta T210