Bryant CNPHP - User Manual

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CNPHP

Installation Instructions

Cased N Coils

Horizontal

Heating --- Cooling

NOTE: Read the entire instruction manual before starting the

installation.

TABLE OF CONTENTS

PAGE

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

INTRODUCTION 1...................................

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

Horizontal Right and Left with Pan Extension 2.........

Furnace Attachment 4..............................

Horizontal Attic 4................................

Horizontal Crawl Space 4...........................

Refrigerant Lines 4................................

Connect Refrigerant Liquid and Suction Lines 4.........

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

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

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 cloths for brazing operations.

Have fire extinguisher available. Read these instructions

thoroughly and follow all warnings or cautions attached to the unit.

Consult local building codes and the current editions of the

National Electrical Codes (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 instructions or

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.

NOTE: Nitrogen can leak out through the needle pierce hole in

the plugs. This does not indicate a leaking coil nor warrant return

of the coil.

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.

WARNING

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

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

UNIT OR PROPERTY DAMAGE HAZARD

Failure to follow this caution may result in property damage.

Take precautions to ensure Aluminum tubes do not come in

direct contact or allow for condensate run off with a dissimilar

metal. Dissimilar metals can cause galvanic corrosion and

possible premature failure.

CAUTION

INTRODUCTION

The CNPHP is a horizontal, multi--use furnace coil (see Fig. 1).

With the use of field--supplied transition duct, these furnace coils

can also be applied to other similar horizontal furnaces on the

market. The CNPHP is available in sizes 024 through 060. All

models are equipped with a factory--installed TXV and are used

with Puron refrigerant (R--410A) systems.

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Summary

Safety Considerations

Electrical Shock Hazard

Warning about turning off main power before servicing to prevent injury or death.

Personal Injury Hazard

Caution regarding Nitrogen precharge and pressure release before removing plugs.

Cut Hazard

Warning about sharp edges on sheet metal parts requiring protective gear.

Unit or Property Damage Hazard

Caution to prevent galvanic corrosion from contact with dissimilar metals.

Installation

Cabinet Sweating

Guidance on insulating the coil casing and supply duct to prevent sweating in unconditioned spaces.

Condensate Management

Instructions for managing condensate to prevent blow-off, including pan extensions for 60 size coils.

TXV

Details on the thermal expansion valve, including handling during brazing and bulb placement.

Horizontal-Right and Horizontal-Left with Pan Extension

Steps for installing pan extensions for 5-ton coils in horizontal configurations.

Horizontal Crawl Space Installation

Connect Refrigerant Liquid and Suction Lines

Unit Damage Hazard

Caution to wrap TXV and tubing with heat-sinking material during brazing to prevent damage.

Condensate Drain Line Connection

Instructions for connecting the condensate drain line, including trap requirements and pitch.

Summary

Safety Considerations

Electrical Shock Hazard

Warning about turning off main power before servicing to prevent injury or death.

Personal Injury Hazard

Caution regarding Nitrogen precharge and pressure release before removing plugs.

Cut Hazard

Warning about sharp edges on sheet metal parts requiring protective gear.

Unit or Property Damage Hazard

Caution to prevent galvanic corrosion from contact with dissimilar metals.

Installation

Cabinet Sweating

Guidance on insulating the coil casing and supply duct to prevent sweating in unconditioned spaces.

Condensate Management

Instructions for managing condensate to prevent blow-off, including pan extensions for 60 size coils.

TXV

Details on the thermal expansion valve, including handling during brazing and bulb placement.

Horizontal-Right and Horizontal-Left with Pan Extension

Steps for installing pan extensions for 5-ton coils in horizontal configurations.

Horizontal Crawl Space Installation

Connect Refrigerant Liquid and Suction Lines

Unit Damage Hazard

Caution to wrap TXV and tubing with heat-sinking material during brazing to prevent damage.

Condensate Drain Line Connection

Instructions for connecting the condensate drain line, including trap requirements and pitch.

The CNPHP is a horizontal, multi-use furnace coil designed for heating and cooling applications, specifically for use with Puron® refrigerant (R-410A) systems. It is available in sizes ranging from 024 to 060, and all models come equipped with a factory-installed TXV (Thermal Expansion Valve). While primarily intended for use with CNPHP furnaces, these coils can also be adapted to other similar horizontal furnaces on the market through the use of a field-supplied transition duct.

Function Description:

The primary function of the CNPHP coil is to facilitate heat exchange within a heating and cooling system. In cooling mode, the coil absorbs heat from the indoor air, transferring it to the refrigerant. In heating mode (when used with a heat pump), the process is reversed, and the coil releases heat into the indoor air. The integrated TXV plays a crucial role in optimizing system performance and comfort by regulating the flow of refrigerant through the coil across the system's operating range.

Important Technical Specifications:

Refrigerant Type: Puron® (R-410A) only.
Sizes: Available in sizes 024 through 060.
TXV: Factory-installed, hard-shutoff TXV with preset, non-field-adjustable superheat settings.
Coil Connection Tube Sizes (Liquid/Suction):
- CNPHP2417A: 3/8 (10) / 5/8 (16)
- CNPHP3017A: 3/8 (10) / 3/4 (19)
- CNPHP3617A: 3/8 (10) / 3/4 (19)
- CNPHP4221A: 3/8 (10) / 7/8 (22)
- CNPHP4821A: 3/8 (10) / 7/8 (22)
- CNPHP6024A: 3/8 (10) / 7/8 (22)
- CNPHP6124A: 3/8 (10) / 7/8 (22)
Condensate Drain: Two 3/4-inch female threaded pipe connections are provided in each coil condensate pan for PVC fittings.
Airflow: Generally, 350 to 400 cfm/ton during normal cooling operation is recommended. Heat pump applications require specific airflow direction.

Usage Features:

Installation Configurations: The CNPHP coil offers versatile installation options, including:
- Work Platform: Secured to roof trusses in the attic.
- Suspended: From hangers on floor joists in a crawl space.
- Blocks/Pads: Mounted on suitable blocks or pads in a crawl space.
- Horizontal Right/Left: With pan extension (5-ton size only) for proper condensate management.
Condensate Management: The coil is designed to manage condensate without blow-off into the ductwork. For 5-ton units, a pan extension is supplied for both horizontal left and right installations to ensure proper drainage. In installations over a finished ceiling or living area, a field-fabricated secondary condensate pan is required.
Airflow Considerations: Proper airflow amount and distribution are critical for optimal system performance, preventing issues like low system performance, restricted TXV, frosted coil, poor humidity control, and water blow-off.
Furnace Compatibility: While designed for CNPHP furnaces, the coil can be adapted to other horizontal furnaces using a field-supplied transition duct. It is important to note that CNPHP furnace coils are not designed for furnaces wider than the coil itself.
Safety Features: The manual emphasizes several safety considerations, including:
- Electrical Shock Hazard: Always turn off main power and lock out/tag switches before installation or servicing.
- Personal Injury Hazard: Nitrogen precharge of 15 PSIG must be released before removing rubber plugs. Sheet metal parts may have sharp edges, requiring protective clothing and gloves.
- Property Damage Hazard: Precautions are needed to prevent galvanic corrosion between aluminum tubes and dissimilar metals from condensate runoff. A secondary condensate pan is required when installing over finished living areas.
- Explosion Hazard: When connecting to a waste (sewer) line, an open trap with an air gap is necessary to prevent sewer gases from escaping.

Maintenance Features:

Refrigerant Line Connections:
- Use accessory refrigerant line sets or field-supplied refrigerant-grade lines.
- A filter dryer should be placed just before the indoor unit.
- When brazing, wrap the TXV and nearby tubing with a wet cloth or heat sink to prevent overheating (temperatures exceeding 212°F/100°C can harm valve performance).
- Use 1/2 psig Nitrogen purge during brazing with Sil-Fos or Phos-copper alloy.
- After brazing, allow joints to cool, slide rubber grommets over joints, and position tubing for an air seal.
- Always evacuate lines and reclaim refrigerant when making connections or flaring. Leak check connections before insulating the suction line.
- If the outdoor unit is not immediately installed, braze liquid and suction lines closed outside and add a Schraeder port test fitting to the suction line.
Condensate Drain Line Maintenance:
- PVC fittings are recommended for condensate pan connections; finger tighten plus 1-1/2 turns.
- Install a plastic plug in any unused condensate drain fitting.
- While a trap is not always necessary on the condensate line, local codes may require one. If so, install it as close to the coil as possible, at least 3 inches (76 mm) deep, and no higher than the bottom of the unit's drain opening.
- Pitch the condensate line 1 inch (25.4 mm) for every 10 feet of length.
- Prime all traps and test for leaks. Insulate traps and lines if located above a living area.
- Test the primary drain line by slowly pouring water into the pan to check for leaks and proper drainage.
- A float switch is recommended in the secondary pan to shut off the unit if water levels become too high, preventing water damage.
Cabinet Sweating: If installed in an unconditioned space (garage, attic), wrap a 6-inch (152 mm) wide piece of insulation around the coil casing and supply duct connection point to prevent cabinet sweating.