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Nordyne R-22 - User Manual

Nordyne R-22
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Installation Instructions
Split System Indoor Coils
!
CAUTION:
Read the Installation Instructions sup-
plied with furnace/air handler and ob-
serve all safety requirements outlined
in instructions and/or furnace/air han-
dler markings before proceeding with
installation of the coil
These instructions are primarily intended to
assist qualified individuals experienced in the
proper installation of this appliance. Some local
and national codes require licensed installation/
service personnel for this type of equipment.
Read all instructions carefully before starting
the installation.

Table of Contents

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Summary

General Information

Coil Specifications

Coil Installation

Upflow Furnace

Instructions for installing the coil in an upflow furnace, including electrical disconnect and sealing.

Downflow

Notes on installing coils in downflow applications, emphasizing secure mounting and air stream placement.

Horizontal

Instructions for horizontal installation, requiring secure mounting and a horizontal drain pan kit.

Horizontal Ready Coils for Horizontal LEFT Installations

Detailed steps for configuring horizontal ready coils for left-side installations, including drain pan setup.

Horizontal Ready Coils for Horizontal RIGHT Installations

Detailed steps for configuring horizontal ready coils for right-side installations, including drain pan setup.

Refrigerant Line Connections

Completing the Installation

Condensate Drain

Guidance on installing the condensate drain connection for the coil, emphasizing level installation and proper fitting.

Maintenance and Service

Air Filter

Instructions for air filter installation, inspection, and replacement for optimal system performance.

Close-Off Plates and Panels

Guidance on installing air close-off plates and reinstalling coil and furnace panels after installation.

Refrigerant Charging

Notes on refrigerant charging for indoor coils, emphasizing evacuation and referencing outdoor unit manual.

Summary

General Information

Coil Specifications

Coil Installation

Upflow Furnace

Instructions for installing the coil in an upflow furnace, including electrical disconnect and sealing.

Downflow

Notes on installing coils in downflow applications, emphasizing secure mounting and air stream placement.

Horizontal

Instructions for horizontal installation, requiring secure mounting and a horizontal drain pan kit.

Horizontal Ready Coils for Horizontal LEFT Installations

Detailed steps for configuring horizontal ready coils for left-side installations, including drain pan setup.

Horizontal Ready Coils for Horizontal RIGHT Installations

Detailed steps for configuring horizontal ready coils for right-side installations, including drain pan setup.

Refrigerant Line Connections

Completing the Installation

Condensate Drain

Guidance on installing the condensate drain connection for the coil, emphasizing level installation and proper fitting.

Maintenance and Service

Air Filter

Instructions for air filter installation, inspection, and replacement for optimal system performance.

Close-Off Plates and Panels

Guidance on installing air close-off plates and reinstalling coil and furnace panels after installation.

Refrigerant Charging

Notes on refrigerant charging for indoor coils, emphasizing evacuation and referencing outdoor unit manual.

Overview

  1. Function Description
  2. Important Technical Specifications
  3. R-22 Units (Coil Model C3BA-/C3BH-)
  4. R-410A Units (Coil Model C4BA-X/C4BH-X)
  5. General Technical Notes
  6. Usage Features
  7. Maintenance Features

This document provides installation instructions for Split System Indoor Coils, designed for use in residential heating and cooling systems. It covers general information, technical specifications, installation procedures, refrigerant line connections, and maintenance guidelines.

Function Description

The Split System Indoor Coils are components of a split-system air conditioning or heat pump system, designed to facilitate heat exchange within an indoor environment. When paired with an outdoor condensing unit, these coils cool and dehumidify the indoor air by absorbing heat from the air and transferring it to the refrigerant. In a heat pump application, they can also function to heat the indoor air. The coils are designed for various configurations, including upflow, downflow, and horizontal applications, and are equipped with braze-type refrigerant connections for ease of installation. Some models (C4 series) utilize a thermostatic expansion valve (TXV) as the metering device for R-410A refrigerant, while others use orifices for R-22 refrigerant. Proper installation ensures efficient condensate drainage and optimal system performance.

Important Technical Specifications

The manual details specifications for both R-22 and R-410A units, categorized by coil model.

R-22 Units (Coil Model C3BA-/C3BH-)

  • Nominal Capacity BTUH (2): Ranges from 24,000 to 60,000 BTUH.
  • Nominal Airflow: Ranges from 900 to 1800 CFM.
  • Installed Orifice Size (3): Varies from 0.060 to 0.093 inches, depending on the model. Orifice sizes are specified for 10 SEER systems, and additional orifices may be supplied.
  • Dimensions (Width W, Height H, Top F):
    • Width (W) ranges from 14 1/4 inches to 22 1/2 inches.
    • Height (H) ranges from 20 inches to 26 inches.
    • Top F (depth) ranges from 12 7/8 inches to 21 1/8 inches.
  • Connections (in.):
    • Liquid Line: 3/8 inch for all models.
    • Suction Line: 3/4 inch or 7/8 inch, depending on the model.
  • Horizontal Drain Kit: Specific part numbers (e.g., 914633, 917492, 914634) are listed for different models.
  • Coil Case Adapter (4): Specific part numbers (e.g., 913963, 913964) are listed for different models, allowing larger coil cases to fit smaller furnace cabinets.

R-410A Units (Coil Model C4BA-X/C4BH-X)

  • Nominal Capacity BTUH (2): Ranges from 24,000 to 60,000 BTUH.
  • Nominal Airflow: Ranges from 900 to 1800 CFM.
  • Metering Device: All R-410A models listed use a TXV (Thermostatic Expansion Valve). An "X" in the model description indicates a factory-installed TXV.
  • Dimensions (Width W, Height H, Top F):
    • Width (W) ranges from 19 3/4 inches to 22 1/2 inches.
    • Height (H) ranges from 20 inches to 29 inches.
    • Top F (depth) ranges from 18 3/8 inches to 21 1/8 inches.
  • Connections (in.):
    • Liquid Line: 3/8 inch for all models.
    • Suction Line: 3/4 inch or 7/8 inch, depending on the model.
  • Horizontal Drain Kit: Specific part numbers (e.g., 917492, 914634, 917188) are listed.
  • Coil Case Adapter (4): Specific part numbers (e.g., 913963, 913964) are listed.

General Technical Notes:

  • Coils are designed for upflow/downflow or horizontal applications. Horizontal applications may require a horizontal drain pan kit.
  • Refrigerant lines should be wrapped with pressure-sensitive neoprene or similar material where they pass through raw edges of holes to prevent damage.
  • The coil must be level for proper condensate drainage.
  • Optional cooling/heating equipment must be properly sized and installed according to furnace manufacturer's specifications.
  • Some local and national codes may require licensed installation/service personnel.
  • ARI Directory is referenced for certified ratings of split systems.

Usage Features

  • Versatile Installation: Designed for upflow, downflow, and horizontal furnace applications. Standard cased coils can be adapted for horizontal use with a horizontal drain pan kit. Factory-ready horizontal coils are also available for left or right installations.
  • Coil Case Adapters: Available to match larger coil cases to smaller furnace cabinets, ensuring compatibility.
  • Easy Refrigerant Connections: Equipped with braze-type connections for straightforward installation of refrigerant lines.
  • Orifice/TXV Metering: Depending on the model and refrigerant type (R-22 or R-410A), the coil uses either a field-replaceable orifice or a factory-installed TXV for refrigerant metering. Instructions are provided for checking and replacing orifices.
  • Condensate Drainage: Features 3/4" NPSC drain connections for the condensate pan. All condensate pans have primary and secondary drain connections to meet FHA requirements, with provisions for a separate 3/4 inch drain from the secondary connection if the unit is located in or above a living space.
  • Horizontal Ready Coils: Specific instructions are provided for configuring horizontal ready coils for both left and right installations, including removing plugs, ensuring proper drain pan webbing removal, and repositioning components.
  • Bypass Air Blocking: Plugs are used in the drain pan to block bypass air in horizontal installations.

Maintenance Features

  • Air Filter Requirement: Air filters are not provided with the coil but are mandatory. They must be installed upstream of the coil and inspected frequently (at least twice a year, typically at the start of heating and cooling seasons). Clogged filters should be replaced (disposable) or cleaned (washable). Operating the system without a suitable filter is cautioned against.
  • Coil and Drain Pan Cleanliness: The coil, drain pan, and condensate drain line should be checked for cleanliness at the start of each heating and cooling season and cleaned as needed to ensure proper operation and prevent blockages.
  • Condensate Drain Inspection: During system checkout, the drain line and connections should be inspected to verify proper condensate disposal. A condensate trap must be installed and primed with water.
  • Refrigerant Charging: Indoor coils are not factory charged with refrigerant. The indoor coil and line set must be evacuated prior to charging. Refer to the outdoor unit installation manual for detailed charging instructions.
  • Orifice Replacement (R-22 units): Instructions are provided for loosening the orifice/distributor body halves, removing the old orifice, checking the size of the new orifice, and inserting it correctly.
  • TXV Sensing Bulb Repositioning (R-410A horizontal units): For horizontal applications, the TXV sensing bulb on the suction line should be repositioned to the 10 o'clock to 2 o'clock position.
  • Safety Precautions: Emphasizes disconnecting all electrical power to the furnace and outdoor unit before performing any maintenance or service.
  • Sealing Enclosure: The enclosure should be sealed to minimize air leakage.
  • Condensate Drain Leveling: Crucial for proper condensate disposal; failure to ensure a level installation can lead to structural damage, equipment failure, or personal injury.
  • Brazing with Dry Nitrogen: When connecting refrigerant lines, dry nitrogen should flow through the joints during brazing to eliminate internal oxidation and scaling. For TXV models, wrapping a wet rag around the sensing bulb during brazing is recommended.

Nordyne R-22 Specifications

General IconGeneral
BrandNordyne
ModelR-22
CategoryRanges
LanguageEnglish