ICP ENA4X18C14A1, ENA4X18C14A2, ENA4X18T14A1, ENA4X18T14A2, ENA4X19C17A1 Installation Guide

...

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

TABLE OF CONTENTS

PAGE

SAFETY CONSIDERATIONS ........................ 1

INTRODUCTION ................................... 2

INSTALLATION .................................... 2

Airflow ........................................... 2

TXV ............................................. 2

Inspect Equipment ................................ 2

Select Installation Procedure ....................... 2

Installation of Furnace Coils ........................ 3

Connect Refrigerant Piping ......................... 5

Connect Refrigerant Liquid and Suction Lines ......... 5

Refrigerant Metering Device ........................ 5

Condensate Drain Line Connection .................. 5

Waste Line Connection ............................ 6

Humidifier Application .............................. 6

Model Number Identification ........................ 7

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

the kits or accessories when installing. Follow all safety codes. Wear safety glasses, protective

clothing, and work gloves. Use quenching cloth for brazing operations. Have fire extinguisher available. Read these

instructions thoroughly and follow all warning 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. When you see this symbol

Z_ 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.

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

ELECTRICALSHOCKHAZARD Failure to follow this warning could result in personal

injury or death. Before installing, modifying or servicing system, always

turn off main power to system. There may be more than

one disconnect switch. Lock out and tag switch with a suitable warning label.

PERSONALINJURY HAZARD Failure to follow this caution may result in personal

injury. This coil contains Nitrogen precharge of 15 PSIG.

Release of this pressure through the center of the rubber lu _beforeremovin the tu s.

ENVIRONMENTAL HAZARD Failure to follow this caution may result in environmental

pollution. Remove and recycle all components or materials (i.e.

oil, refrigerant, etc.) before unit final disposal.

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

loves when handlin arts.

484 01 3600 00 April 2010

iNTRODUCTiON

Use this instruction manual to install indoor coils on upflow or downflow furnaces. Do not install coil in horizontal

position. Coils are enclosed in a painted casing have factory-installed TXV's. These coils are used with R-410A

refrigerant systems.

INSTALLATION

These units can be installed in multiple configurations. Before installation, there are several performance

requirements that must be considered because poor installation can negatively alter performance. This section

wilt briefly discuss those factors.

Airflow

Airflow amount and distribution are vital to adequate system performance. Problems that can be experienced with

incorrect airflow include:

• low system performance

• restricted TXV frosted coil

poor humidity control water blow-off

When attaching the coil and building the plenum, pay special attention to the effect these details will have on

airflow. After system start-up, check the cfm to insure that it is correct. (Generally, the cfm should be 350 to 400 cfm/ton

during normal cooling operation.)

TXV

A thermal expansion valve is utilized in this coil design to optimize performance and comfort throughout the entire

operating range of the system. Special attention needs to be taken to the TXV when installing the coil

Do not overheat valve. Temperatures that exceed 212°F

(100_}0) can harm valve performance. Use a wet cloth or

heat sink when brazing. Place liquid filter dryer near ID unit to reduce the risk of

debris clogging the valve. Make sure TXV bulb is securely fastened and wrapped in the indentation on vapor line tube.

END4X, ENW4X coils have a factory-installed hard-shutoff TXV designed only for use with R-410A refrigerant. Use

only with outdoor units designed for R-410A. NOTE: AIt TXV'S have preset superheat settings and are

not field-adjustable.

Cabinet Sweating

if this unit is installed in a garage, attic, or other unconditioned space, special attention needs to be given to

the potential of cabinet sweating. A 6-in (152 mm) wide piece of insulation should be wrapped around the coil

casing and supply duct connection point.

Inspect Equipment

File claim with shipper if equipment is damaged.

NOTE: Models with tin-plated copper coils, "T" in the 8th position of the model number, are

standard copper coils.

installed the same as

Select Installation Procedure

PROPERTY DAMAGE HAZARD Failure to follow this caution may result in property

damage. installing coils rotated 90 ° from the front of the furnace,

in upflow or downflow applications, may cause water blow-off or coil freeze-up due to the concentration of air

on one slab of the coil or lack of air to a stab in the coil. it is recommended that on this type of application, a

field-supplied adapter be placed between the coil and furnace to allow air to distribute properly between all

slabs of the coil.

NOTE: Furnace coils are not approved to be used in fan coil or "draw-through" type applications.

To install cased coils in upflow applications, follow the

instructions below, Upflow Cased Coil Installation.

To install cased coils in downflow applications, follow the

instructions below, Downflow Cased Coil installation. See Table 1 for dimensions and overhang options. Refer to

instructions for placement of coil casing on furnace.

2 484 01 3600 00

Table 1

MODEL NUMBER TONS

END4X18(C,T) 14A 1 - 1/2 14-3/16 (360) END4X19(C,T)17A 1-1/2 17-1/2 (445)

END4X24(C,T)14A 2 14-3/16 (360) END4X24(C,T)17A 2 17-1/2 (445)

END4X30(C,T) 14A 2-1/2 14-3/16 (360) END4X30(C,T)17A 2-1/2 17-1/2 (445)

END4X31(C,T)17A 2-1/2 17-1/2 (445) END4X36(C,T)17A 3 17-1/2 (445)

END4X36(C,T)21A 3 21 (533) END4X37(C,T)17A 3 17-1/2 (445)

END4X42(C,T)17A 3-1/2 17-1/2 (445) END4X42(C,T)21A 3-1/2 21 (533)

END4X43(C,T)24A 3-1/2 24-1/2 (622) END4X48(C,T)21A 4 21 (533)

END4X48(C,T)24A 4 24-1/2 (622) END4X60(C,T)24A 5 24-1/2 (622)

END4X61 (C,T)24A 5 24-1/2 (622) ENW4X36 (C,T) 17A 3 17-1/2 (445)

ENW4X42(C,T)21A 3-1/2 21 (533) ENW4X48(C,T)21A 4 21 (533)

ENW4X60(C,T)24A 5 24-1/2 (622)

NOTES:

For the model number; C = standard copper and T= tin plated copper

FLUSH FIT TO

FURNACE WIDTH

inches (ram)

COIL CONNECTION SHELF WIDTH FITS NEXT SMALLER FURNACE

Liquid Suction

3/8 5/8 3/8 5/8

3/8 3/4 3/8 3/4

3/8 7/8 3/8 7/8

3/8 7/8 3/8 3/4

3/8 7/8 3/8 7/8

3/8 7/8

END4X, ENW4X COiL INFORMATION

TUBE SIZE

inches (ram)

(See Figure 1,

Dim. A)

inches (ram)

12-7/8 (327)

16-3/16 (411)

12-7/8 (327)

16-3/16 (411)

12-7/8 (327)

16-3/16 (411) 16-3/16 (411)

16-3/16 (411)

19-5/8 (498)

16-3/16 (411) 16-3/16 (411)

19-5/8 (498)

23-1/8 (587)

19-5/8 (498) 23-1/8 (587) 23-1/8 (587)

23-1/8 (587)

16-3/16 (411)

19-5/8 (498)

19-5/8 (498) 23-1/8 (587)

Overhang

Equal

N/A

No No

Yes

No No

Yes Yes

Overhang with

Transition

N/A Yes

Yes Yes

Yes

Yes Yes

Yes

No No

Offset Left

N/A Yes

Yes Yes

Yes

Yes Yes

No No

Field-supplied Plenum

193/16"

Coil Support Shelf

(152)

Table 1

Figure 1 - Correct Orientation of Coil Support on Furnace

L Furnace

(57)

A08336

Installation of Furnace Coils

Upflow Cased Coil installation NOTE: On upflow installations where the indoor coil is

placed in an unconditioned space, a 6 inch (152 mm) wide piece of insulation should be applied and wrapped around the outside of coil casing and supply duct contact point.

1. Set coil in place on upflow furnace discharge air opening. See Figure 2.

2. When coil front width matches furnace front width, the coil can be placed directly on furnace.

3. Ensure coil is level for proper condensate drainage. Do not tip coil toward condensate drain. Coil

enclosure need not be fastened or screwed to

furnace.

Return

Upflow Furnace

Evaporator Coil

Downflow

Furnace

Supply

A05411

Figure 2 - Typical Coil Installation

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