International Comfort Products END4X, ENW4X Installation Manual

INSTALLATION INSTRUCTIONS

Cased N Coil, Upflow−Downflow

END4X, ENW4X

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

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.

WARNING

ELECTRICAL SHOCK HAZARD

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.

CAUTION

PERSONAL INJURY 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 plugs is required before removing the plugs.

CAUTION

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.

CAUTION

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.

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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 will briefly discuss those factors.

Airflow

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

S low system performance S restricted TXV S frosted coil S poor humidity control S 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

S Do not overheat valve. Temperatures that exceed 212_F

(100_C) can harm valve performance. Use a wet cloth or heat sink when brazing.

S Place liquid filter dryer near ID unit to reduce the risk of

debris clogging the valve.

S 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: All 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 installed the same as standard copper coils.

Select Installation Procedure

CAUTION

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 slab 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.

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Table 1

MODEL NUMBER TONS

FLUSH FIT TO

FURNACE WIDTH

inches (mm)

END4X, ENW4X COIL INFORMATION

COIL CONNECTION

TUBE SIZE

inches (mm)

Liquid Suction

SHELF WIDTH

(See Figure 1,

Dim. A)

inches (mm)

FITS NEXT SMALLER FURNACE

Equal

Overhang

Overhang with

Tr an si tio n

Offset Left

END4X18(C,T)14A 1-1/2 14-3/16 (360) 3/8 5/8 12-7/8 (327) N/A N/A N/A END4X19(C,T)17A 1-1/2 17-1/2 (445) 3/8 5/8 16-3/16 (411) No Yes Yes END4X24(C,T)14A 2 14-3/16 (360) 3/8 5/8 12-7/8 (327) N/A N/A N/A END4X24(C,T)17A 2 17-1/2 (445) 3/8 5/8 16-3/16 (411) No Yes Yes END4X30(C,T)14A 2-1/2 14-3/16 (360) 3/8 3/4 12-7/8 (327) N/A N/A N/A END4X30(C,T)17A 2-1/2 17-1/2 (445) 3/8 3/4 16-3/16 (411) No Yes Yes END4X31(C,T)17A 2-1/2 17-1/2 (445) 3/8 3/4 16-3/16 (411) No Yes Yes END4X36(C,T)17A 3 17-1/2 (445) 3/8 3/4 16-3/16 (411) No Yes Yes END4X36(C,T)21A 3 21 (533) 3/8 3/4 19-5/8 (498) No Yes Yes END4X37(C,T)17A 3 17-1/2 (445) 3/8 3/4 16-3/16 (411) Ye s No No END4X42(C,T)17A 3-1/2 17-1/2 (445) 3/8 7/8 16-3/16 (411) No Ye s Yes END4X42(C,T)21A 3-1/2 21 (533) 3/8 7/8 19-5/8 (498) No Ye s Yes END4X43(C,T)24A 3-1/2 24-1/2 (622) 3/8 7/8 23-1/8 (587) No Yes Ye s END4X48(C,T)21A 4 21 (533) 3/8 7/8 19-5/8 (498) No Ye s Yes END4X48(C,T)24A 4 24-1/2 (622) 3/8 7/8 23-1/8 (587) No Ye s Yes END4X60(C,T)24A 5 24-1/2 (622) 3/8 7/8 23-1/8 (587) No Ye s Yes END4X61(C,T)24A 5 24-1/2 (622) 3/8 7/8 23-1/8 (587) No Ye s No

ENW4X36(C,T)17A 3 17-1/2 (445) 3/8 3/4 16-3/16 (411) Ye s No No ENW4X42(C,T)21A 3-1/2 21 (533) 3/8 7/8 19-5/8 (498) Ye s No No ENW4X48(C,T)21A 4 21 (533) 3/8 7/8 19-5/8 (498) Yes No No ENW4X60(C,T)24A 5 24-1/2 (622) 3/8 7/8 23-1/8 (587) Ye s No No

NOTES:

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

Field-supplied Plenum

⁄16″

(487)

⁄2″

(13)

Field Coil Support Shelf

⁄16″

(27)

⁄16″

(30)

6″

(152)

(57)

⁄4″

See Table 1

Furnace

A08336

Figure 1 − Correct Orientation of Coil Support on Furnace

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

Supply

Evaporator

Upflow Furnace

Return

Coil

Supply

Figure 2 − Typical Coil Installation

Downflow Furnace

A05411

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