CARRIER Evaporator Coils Manual L0211039

User Manual: CARRIER CARRIER Evaporator Coils Manual CARRIER Evaporator Coils Owner's Manual, CARRIER Evaporator Coils installation guides

Open the PDF directly: View PDF .
Page Count: 4

Installation and Start-Up Instruction

Direct Expansion

Horizontal Duct Coils CE3A

/

Fig. 1---Model CE3A Coil

NOTE: Read the entire instruction manual before starting the installation.

A_I_

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 cloth for brazing operations. Have fire extinguisher available. Read

these instructions thoroughly and follow all warning or cautions attached to the unit. Consult local building codes and National Electrical Code

(NEC) for special requirements.

It is important to recognize safety information. This is the safety-alert symbol z_ - When you see this symbol on the unit and in instructions or

manuals, be alert to the potential for personal injury.

Understand the signal word 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 would result in minor personal injury or product and property damage.

Form: IM-CE3A-05 Cancels: IM-CE3A-04 Pdnted in U.S.A. 7-02 Catalog No. 63CE-3A2

WARNING: Before installing or servicing system, always turn off main power to system. There may be more than one

disconnect switch. Turn off accessory heater power, if applicable. Electrical shock can cause personal injury or death.

CAUTION: This coil contains Nitrogen precharge of 15PSI. Release of this pressure through the center of the rubber

plugs is required before removing the plugs.

IMPORTANT: Nitrogen can leak out through the hole that the needle pierced in the plugs. This does not indicate leaking coil nor warrant return

of coil.

INSTALLATION

Use these instructions to install Model CE3A duct coil in horizontal position, (See Fig. 1.) Model CE3A duct coil is designed and tested to conform

to recommendations and standards established by Air Conditioning and Refrigeration Institute (ARI) Standard 210. It is easily adaptable to most

types of existing forced-air heating systems, or can be installed in an independent air-cooling system.

PROCEDURE 1--CHECK EXISTING DUCTWORK

Inspect the previously installed air distribution system for heating, to determine its suitability for cooling. Existing heating ductwork may have to

be modified and insulated to provide better air distribution for cooling.

PROCEDURE 2--INSULATE AND VAPORPROOF DUCT

Externally insulated ductwork must have an adequate vapor seal for summer operation. This is particularly important where the duct is exposed

to high humidity conditions in attics, vented crawl spaces, unconditioned basements and utility rooms. The vapor seal prevents condensation in

the insulating material and subsequent loss of insulating value. Properly installed heating supply ducts should already have adequate insulation

against excessive heat loss. This same insulation should, therefore, be satisfactory in the summer for protection against heat gain. However,

depending on the specific installation, it may be desirable to add to the insulation.

PROCEDURE 3--INSTALL COIL IN SUPPLY AIR DUCT

1. When the connecting air supply duct is smaller than the coil inlet opening, construct transition piece so that vertical and horizontal

dimensions of transition piece do not increase more than 30° angle. If connecting outlet duct is smaller than outlet opening of coil, limit

transition to maximum of 45° angle.

2. Provide at least 3ft of straight duetwork preceding coil inlet.

3. Place coil in ductwork so metering device is on upstream side. (See Fig. 2.) Direction of airflow through coil is plainly marked with adhesive

sticker. When access to refrigerant and drain lines is limited, the coil may be installed with air flow opposite the directional sticker.

IMPORTANT: Reversal of air through coil results in 1-1/2 to 2 percent reduction in capacity of A024 through A060 size.

4. Install coil so that it pitches slightly (1/8 in.) toward condensate drain opening. Coils have drain opening on 1 side only.

5. Support coil from floor or suspend it When coil is suspended, provide adequate hangers to hold coil.

NOTE: When coil is installed over a finished ceiling or living area, a secondary condensate pan must be constructed and installed under entire

coil section.

/,- l_he-IN.

BRASS HEX

NUT PISTON

PLUG _RETAINER

"- TEFLON SEAL

_-"PISTON NUMBER

STAMPED INTO

SIDE OF NUT

3/4-1N. BRASS

HEX BODY

_f

d

_-- COPPERTUBE

A_2_

Fig. 2--Metering Device

PROCEDURE 4--REFRIGERANT LINES

Refrigerant lines must be configured per local building codes. Lay out lines in relation to specifications and job site requirements.

PROCEDURE 5--CONNECT REFRIGERANT LIQUID AND SUCTION LINES

For matched and mismatched systems, use line sizes recommended in outdoor unit Installation Instructions.

The coil can be connected to outdoor units using accessory refrigerant line sets or field-supplied lines of refrigerant grade. Always evacuate lines

and reclaim refrigerant when making connections or flaring refrigerant lines. Leak check connections before insulating entire suction line.

CAUTION: If unit is to be installed on system with a thermostatic expansion valve, removal of indoor coil piston is

required.

A. Suction Line

Suction line is designed for field sweat connection. Provide inverted loop on suction line if set exceeds 50 ft, per application guide. Sweat stub

has a rubber shipping plug to keep out moisture and dirt. Remove plug only when ready to make field sweat connection.

--2--

CAUTION: To avoid damage while brazing, wrap tubing or fitting with a heat-sinking material, such a wet cloth.

B. Liquid Line

Liquid line is designed for sweat connection. During installation these steps should be followed:

1. Replace piston if required. Check piston size stamped into side of brass hex nut. (gee Fig. 2.) If piston number does not match required

piston shown on outdoor unit rating plate, replace indoor piston with piston shipped with outdoor unit.

2. When piston is replaced, finger tighten plus 1/4 turn.

CAUTION: Remove Teflon seal during brazing. Replace when fitting has cooled.

3. Liquid stub has a rubber shipping plug to keep out moisture and dirt. Remove plug only when ready to make field sweat connection.

Table 1--Refrigerant Metering Device

MODEL NUMBER TONNAGE METERING DEVICE

PISTON NUMBER

CE3AXA024000 2 59

CE3AXA030000 2-1/2 67

CE3AXA036000 370

CE3AXA042000 3-1/2 78

CE3AXA048000 4 84

CE3AXA0600_ 5 90

PROCEDURE 6_CONNECT CONDENSATE LINES

The coil is designed to dispose of accumulated water through built-in condensate drain fittings. Two 3/4-in. female threaded pipe connections are

provided in each coil condensate pan. Install a trap in condensate line as close to coil as possible. Make trap at least 3 in. deep and no higher than

the bottom of unit condensate drain opening. (See Fig. 3.) Pitch condensate line 1 in. for every 10 ft of length to an open drain or sump:

NOTE: If unit is located in or above a living space where damage may result from condensate overflow, a field-supplied, external condensate

pan should be installed underneath entire unit, and a secondary condensate line (with appropriate trap) should be run from the unit into the pan.

Any condensate in this external condensate pan should be drained to a noticeable place. As an alternative to using an external condensate pan, some

localities may allow the running of a separate 3/4-in. condensate line (with appropriate trap) per local code to a place where the condensate will

be noticeable. The owner of the structure must be informed that when condensate flows from secondary drain or external condensate pan, the unit

requires servicing or water damage will occur.

f COIL f FAN UNIT

<_ AIRFLOW

i

MIN _

MUST BE BELOW

DRAIN PAN LEVEL

A91039

Fig. 3_Typical Trap Installation

MAINTENANCE

To ensure optimum performance and to minimize possible equipment problems, periodic maintenance must be performed on this equipment.

Consult your dealer on proper frequency of maintenance and the availability of a maintenance contract.

Proper maintenance on this equipment requires certain skills and tools. If you do not possess these, obtain qualified dealer assistance.

/_ WARNING: Disconnect all electrical power to air handler (furnace) and outdoor unit before performing any

maintenance or service on unit. Units may have more than 1 electrical power supply. A failure to adhere to this warning can

cause personal injury.

m3__

Minimum maintenance should be performed on this equipment as follows:

1. Check and clean or replace air filter each month, or as required.

2. Check cooling coil, drain pan and condensate drain at start of each cooling season for cleanliness. Clean as needed.

NOTE: Because of possible damage to equipment, or personal injury, maintenance should be performed by qualified persons only.

WARNING: As with any mechanical equipment, personal injury can result from sharp metal edges, etc.; therefore, be

careful when removing parts.

A. Air Filter

An air filter is not provided ,x_an inte_ai part of this cooling coil. However, a field-supplied filter must be used upstream of the coil and must

be inspected frequently. When filter becomes clogged with dust or lint, it should be replaced (disposable type) or cleaned (cleanable type). Inspect

filter at least once each month, and replace or clean at least twice a year (more often if necessary).

NOTE: Do not operate coil without a filter in place in return-air duct. Always replace filter with same size and type filter.

_. WARNING: Before installing or servicing fan coil, always turn off all power to the unit. There may be more than 1

disconnect switch. Turn off accessory heater power if applicable. Electrical shock can cause personal injury or death.

B. Condensate Pan and Drain

Check drain pan and condensate drain at the same time cooling coil is checked. Clean drain pan and condensate drain thoroughly. Flush pan and

drain tube with clear water. If drain tube or trap is restricted, clean with high-pressure water. If this does not work, try a plumber's snake or similar

probe device. (See Fig. 3.)

C. Cleaning Coil

To gain access to coil, it may he necessary to cut a window in ductwork.

After cutting out section of ductwork and cleaning coil, cover opening with new, evenly cut piece of sheet metal and fasten in place with sheet

metal screws.

Coil is easily cleaned when dry. Therefore, check and clean coil before each cooling season. Inspect coil periodically during cooling season. If

coil is coated with dirt or lint, clean with a vacuum using soft brush attachment. BE CAREFUL NOT TO BEND COIL FINS. If coil is coated

with oil or grease, disconnect and remove coil from ductwork. Then, clean coil with mild detergent and water solution. Rinse with clear water.

D. Replacing or Cleaning Metering Device

The piston of the metering device shipped with coil is used for most applications. However, for reliable, full capacity operation, use piston shipped

with the outdoor unit in the indoor coil, if the piston in the indoor coil is different.

I. Pump down outdoor unit. Shut off service valves at condensing unit.

/_ WARNING: Be sure all electrical power to equipment is turned off. A failure to adhere to this warning can cause

personal injury.

2. Recover remaining refrigerant from tubing and coil through gage port on suction service valve.

3. Where required, remove front panel from coil casing.

4. Disconnect refrigerant liquid tube from metering device.

5. Using knife, pry off piston retainer (flare end of metering device).

6. Using small wire, pull out piston from body of metering device. (See Fig. 2.)

7. When cleaning piston, be careful not to scratch or enlarge opening, as this will affect operation.

8. Install new (or replace cleaned) piston in metering device body. There is no front or back to piston.

9. Install new piston retainer (because of probable damage done in initial removal).

10. Reconnect and tighten refrigerant tube.

NOTE: To avoid deforming metering body, causing piston to lodge in partially open or closed position, use a backup wrench and do not

overtighten.

1I. Pressurize tubing and coil, then check for leaks.

12. Purge or evacuate tubing and coil as necessary.

t:12002 CACt_DP 7310 W. Morris St.. Indianapolis, IN 46231 imce3a05 _Book/Tab: 1/3d,2/4d Catalog No. 63CE-3A2