Carrier FX4D - User Manual

FX4D

Installation Instructions

DIRECT EXPANSION FAN COIL UNITS

FOR PURON

®

REFRIGERANT

SIZES 019 TO 061

NOTE

: Read the entire instruction manual before starting the

installation.

TABLE OF CONTENTS

PAGE

SAFETY CONSIDERATIONS

1

. . . . . . . . . . . . . . . . . . . . . . . .

INTRODUCTION

1

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

HEATER PACKAGES

1

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

INSTALLATION

1

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Step 1 -- Check Equipment

2

. . . . . . . . . . . . . . . . . . . . . . . . . .

Step 2 -- Mount Unit

2

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Step 3 -- Air Ducts

4

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Step 4 -- Electrical Connections

4

. . . . . . . . . . . . . . . . . . . . . .

Step 5 -- Refrigerant Tubing Connection and Evacuation

7

. . .

Step 6 -- Refrigerant Flow--Control Device

7

. . . . . . . . . . . . . .

Step 7 -- Condensate Drains

8

. . . . . . . . . . . . . . . . . . . . . . . . .

Step 8 -- Accessories

9

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Step 9 -- Sequence of Operation

9

. . . . . . . . . . . . . . . . . . . . . .

START--UP PROCEDURES

10

. . . . . . . . . . . . . . . . . . . . . . . . .

CARE AND MAINTENANCE

10

. . . . . . . . . . . . . . . . . . . . . . .

AIRFLOW PERFORMANCE TABLES

11

. . . . . . . . . . . . . . . .

PURON

R

(R--410A) QUICK REFERENCE GUIDE

12

. . . . . .

SAFETY CONSIDERATIONS

Improper installation, adjustment, alteration, service, maintenance,
or use can cause explosion, fire, electrical shock, or other

conditions which may cause death, 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 kits or accessories when installing.
Follow all safety codes. Wear safety glasses, protective clothing

and work gloves. Have a fire extinguisher available. Read these

instructions thoroughly and follow all warnings or cautions
included in literature and attached to the unit. Consult local

building codes and the current editions of the National Electrical
Code (NEC) NFPA 70.
In Canada, refer to the current editions of the Canadian Electrical

Code CSA C22.1.

Recognize safety information. This is the safety--alert symbol

.

When you see this symbol on the unit and in instruction manuals,

be alert to the potential for personal injury.
Understand the signal words

DANGER

,

WARNING

, and

CAUTION

. 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.

ELECTRICAL OPERATION HAZARD

Failure to follow this warning could result in personal injury

or death.
Before installing or servicing unit, always turn off all power to

unit. There may be more than 1 disconnect switch. Turn off

accessory heater power if applicable. Lock out and tag switch

with a suitable warning label.

!

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 and gloves when

handling parts.

CAUTION

!

INTRODUCTION

Model FX4D is designed for flexibility and can be used for
upflow, horizontal, or downflow (kit required) and manufactured

and mobile home applications. These units are designed to meet

the low air leak requirements currently in effect. Because of this,
the units need special attention in the condensate pan and drain

connection area and when brazing tubing. These units are designed
specifically for Puron

r

refrigerant and must be used only with

Puron

r

refrigerant air conditioners and heat pumps as shipped.

These units are available for systems of 18,000 through 60,000

Btuh nominal cooling capacity. Factory--authorized, field--installed

electric heater packages are available in sizes 5 through 30kW. See
Product Data literature for available accessory kits.

HEATER PACKAGES

This unit may or may not be equipped with an electric heater
package. For units not equipped with factory--installed heat, a

factory--approved, field--installed, UL listed heater package is
available from your equipment supplier. See unit rating plate for a

list of factory--approved heaters. Heaters that are not factory

approved could cause damage which would not be covered under
the equipment warranty. If fan coil contains a factory--installed

heater package, minimum circuit ampacity (MCA) and maximum
fuse/breaker may be different than units with a same size

field--installed accessory heater. The difference is not an error and

is due to calculation diferences per UL guidelines.