Literature C84DA Series Split System Uncased Indoor Coils Downturn Instruction Manual
- June 12, 2024
- Literature
Table of Contents
INSTALLATION INSTRUCTIONS
C84DA Series Split System Uncased Indoor Coils – Downturn
IMPORTANT
ATTENTION INSTALLERS:
It is your responsibility to know this product better than your customer. This
includes being able to install the product according to strict safety
guidelines and instructing the customer on how to operate and maintain the
equipment for the life of the product. Safety should always be the deciding
factor when installing this product and using common sense plays an important
role as well. Pay attention to all safety warnings and any other special notes
highlighted in the manual. Improper installation of the furnace or failure to
follow safety warnings could result in serious injury, death, or property
damage.
These instructions are primarily intended to assist qualified individuals
experienced in the proper installation of this appliance. Some local codes
require licensed installation/service personnel for this type of equipment.
Please read all instructions carefully before starting the installation.
Return these instructions to the customer’s package for future reference.
DO NOT DESTROY. PLEASE READ CAREFULLY AND KEEP IN A SAFE PLACE FOR FUTURE
REFERENCE.
IMPORTANT SAFETY INFORMATION
Please read all instructions before servicing this equipment. Pay attention to
all safety warnings and any other special notes highlighted in the manual.
Safety markings are used frequently throughout this manual to designate a
degree or level of seriousness and should not be ignored.
WARNING: indicates a potentially hazardous situation that if not avoided,
could result in personal injury or death.
CAUTION: indicates a potentially hazardous situation that if not avoided,
may result in minor or moderate injury or property damage.
**WARNING: C84DA coils
are pressurized with Nitrogen at the factory. Avoid direct face exposure or
contact with valve when gas is escaping. Alwaysensure adequate ventilation is
present during the depressurization process. Any uncertainties should be
addressed before proceeding.
****WARNING:
PROPOSITION 65 WARNING: This product contains chemicals known to the state
of California to cause cancer, birth defects or other reproductive harm.
****WARNING:
Improper installation, service, adjustment, or maintenance may cause
explosion, fire, electrical shock or other hazardous conditions which may
result in personal injury or property damage. Unless otherwise noted in these
instructions, only factory authorized kits or accessories may be used with
this product.
****WARNING:
** This unit must be installed in accordance with the instructions outlined in
this manual during the installation, service, and operation of this unit.
Unqualified individuals should not attempt to interpret these instructions or
install this equipment. If you do not posses mechanical skills or tools, call
your local dealer for assistance. Under no circumstances should the equipment
owner attempt to install and/or service this equipment. Failure to follow
safety recommendations could result in possible damage to the equipment,
serious personal injury or death.
- The installer must comply with all local codes and regulations which govern the installation of this type of equipment. Local codes and regulations take precedence over any recommendations contained in these instructions. Consult local building codes for special installation requirements.
- Familiarize yourself with the controls that shut off the electrical power to the unit. If the unit needs to be shut down for an extended period of time, turn off electrical power at the circuit breaker. For your safety always turn off the electrical power before performing service or maintenance on the unit.
- Installation of equipment may require brazing operations. Installer must comply with safety codes and wear appropriate safety equipment (safety glasses, work gloves, fire extinguisher, etc.) when performing brazing operations.
- Read the Installation Instructions supplied with the furnace or air handler. Always observe all safety requirements outlined in this manual and on the furnace or air handler markings before installing the coil.
- Follow all precautions in the literature, on tags, and on labels provided with the equipment. Read and thoroughly understand the instructions provided with the equipment prior to performing the installation and operational checkout of the equipment.
GENERAL INFORMATION
C84DA series coils are designed for upflow or downflow applications and are equipped with down turned refrigerant connections and are ready for brazing.
- Check the coils orifice size and confirm that it’s suitable for application with the intended outdoor unit. Depending on application, additional installer supplied orifice or TXV may be required.
- Optional cooling/heating equipment must be properly sized and installed in accordance with the furnace manufacturer’s specifications and approved recommendations.
- Heating only furnace air circulators may have to be replaced with multi-speed Heating/Cooling blowers to upgrade the air delivery (CFM) when an add-on coil is installed. Refer to Table 1 (page 6) for coil specifications, recommended CFM, and allowances for pressure drop across the coil and filters.
- Verify that the air delivery of the furnace/air handler is adequate to handle the static pressure drop of the coil, filter, and duct work.
- If precise forming of refrigerant lines is required, a copper tubing bender is recommended. Avoid sharp bends and contact of the refrigerant lines with metal surfaces.
- Refrigerant lines should be wrapped with pressure sensitive neoprene or other suitable material where they pass against sharply edged sheet metal.
- The coil enclosure (if provided) and suction line must be insulated as needed to prevent condensate from forming and causing property damage.
- Do not remove seals from the coil until the tubing connections are ready to be made.
- Close-off plates are available in some air filter kits. Refer to the Replacement Parts List for available part numbers. Install the necessary close-off plates around the refrigerant lines and drain line where required. Reinstall all inner and outer panels of the furnace/air handler that were previously removed when installing the indoor coil.
COIL INSTALLATION
WARNING:
ELECTRICAL SHOCK, FIRE OR EXPLOSION HAZARD
Failure to follow safety warnings exactly could result in serious injury or
property damage.
Improper servicing could result in dangerous operation, serious injury, death
or property damage.
- Before servicing, disconnect all electrical power to the furnace and outdoor condensing unit.
- When servicing controls, label all wires prior to disconnecting. Reconnect wires correctly.
- Verify proper operation after servicing.
CAUTION:
The coil must be level to ensure proper condensate drainage. An unlevel
installation may result in structural damage, premature equipment failure, or
possible personal injury.
Upflow Installations
- Disconnect all electrical power to the furnace.
- Install the coil case on the furnace air discharge opening and level it as needed to ensure proper condensate drainage. If needed, make a plate to adapt the coil to the air discharge opening. See Figure 2 (page 6) for coil dimensions.
- Make and install the plenum over the coil. Insulate as required.
- Seal the enclosure as required to minimize air leakage.
- Connect the refrigerant lines as outlined in the Refrigerant Line Connection section.
Downflow Installations
These coils may be installed in downflow applications. It is required that the
furnace and coil cabinets are securely mounted together before setting in
place. Fossil fuel applications require the coil to be placed in the supply
air stream only.
Refrigerant Line Connections
System Depressurization
-
Remove the cap (Figure 1) from the end of the liquid line.
-
Verify pressurization by depressing the Schrader valve on the end of the liquid line. Listen for any escaping gas.
If there is no pressure, test the coil for leakage.
• If leakage is found, clearly mark the location of the leak and return the coil to the distributor for processing.
• If no leaks are found, the coil may be installed. -
Depress the valve to relieve all pressure from the coil.
Connecting the Linesets
-
Route and cut both lineset tubes to proper length in accordance with the outdoor unit specifications. Verify the ends are round, clean, and free of any burrs.
-
Cut off the fitting on the 3/8” line of the coil. Swage as needed to fit the line set.
-
Connect the suction and liquid lineset tubes.
CAUTION:
It is recommended that a wet rag be wrapped around the suction line in front of the close off plate before applying heat. Failure to keep components cool during brazing may result in structural damage, premature equipment failure, or possible personal injury. -
Braze the individual connections with dry nitrogen flowing through the joints. This will prevent internal oxidation and scaling from occurring.
IMPORTANT: To prevent internal oxidation and scaling from occuring, braze all connections with dry nitrogen flowing through the joints. -
Wrap the refrigerant lines with pressure sensitive neoprene or other suitable material especially where the lines enter the opening in the sheet metal.
-
Evacuate the system of moisture and non-condensables to prevent low efficiency operation or damage to the unit. The suggested range of evacuation is 250 – 500 microns.
-
Charge the system with refrigerant. Please Refer to the outdoor unit installation manual for additional charging instructions.
-
Check the system for leaks, including the lineset and the brazed joints.
NOTE: Apply a soap and water solution on each joint or union with a small paintbrush. If bubbling is observed, the connection is not adequately sealed. -
Properly dispose of all removed parts.
Condensate Drain
CAUTION:
The coil must be level to ensure proper condensate drainage. Improper
condensate disposal may result in structural damage, premature equipment
failure, or possible personal injury.
-
Methods for disposing of condensate vary according to local codes. Refer to local codes or authority having jurisidiction for restrictions and proper condensate disposal requirements.
-
All condensate pans have primary and secondary drain connections to meet FHA requirements. If the application is located in or above a living space where damage may result from condensate overflow, a separate 3/4 inch drain must be provided from the secondary drain connection and a secondary drain pan must be installed under the entire unit. Run secondary drain lines to a place where they are noticeable if used.
-
The coil condensate pan is designed with 3/4” NPSC drain connections. Use a PVC or similar material fitting to attach the drain line to the pan.
NOTE: The fitting should be hand tightened only. Overtightening may crack the drain pan and cause condensate to leak. -
The drain pan MUST be drained with field supplied tubing and looped to form a trap.
IMPORTANT: Failure to install a trap may result in condensation overflowing the drain pan, resulting in substantial water damage to surrounding area. -
Prime the trap with water. Insulate the drain if it is located in an unconditioned space, and test the condensate line for leaks. Consult local codes for additional restrictions or precautions.
-
Route the lines to a suitable drain, avoiding sharp bends and pinching of the lines. The drain should maintain a minimum horizontal slope in the direction of discharge of not less than 1” vertical for every 10 ft of horizontal run.
-
During system checkout, inspect the drain line and connections to verify proper condensate drainage.
Air Filter
Air filters are not supplied as an integral part of this coil; however, an air
filter kit is available. Refer to the Replacement Parts List for available
part numbers. The filter must be installed upstream of the coil and inspected
frequently. When the filter becomes clogged with dust or lint, it should be
replaced (disposable type) or cleaned (washable type). It is recommended that
filters be inspected and replaced at least twice during the year. Generally it
is best to replace or clean the filters at the start of each heating and
cooling season.
MAINTENANCE & SERVICE
WARNING:
ELECTRICAL SHOCK, FIRE OR EXPLOSION HAZARD
Failure to follow safety warnings exactly could result in serious injury or
property damage.
Improper servicing could result in dangerous operation, serious injury, death
or property damage.
- Before servicing, disconnect all electrical power to the furnace and outdoor condensing unit.
- When servicing controls, label all wires prior to disconnecting. Reconnect wires correctly.
- Verify proper operation after servicing.
CAUTION:
Do not operate the system without a suitable filter in the return air duct
system. Always replace the filter with the same size and type.
To ensure optimum performance and to minimize possible equipment failure, the
following maintenance tasks should be performed periodically on this
equipment:
- The air filter installed with the system should be checked and cleaned or replaced twice per year.
- Check the coil, drain pan, and condensate drain line for cleanliness at the start of each heating and cooling season. Clean as needed.
COIL SPECIFICATIONS & DIMENSIONS
C84DA-| X24| X30| X36| X42| X43| X48|
X49
---|---|---|---|---|---|---|---
Nominal Capacity (BTU/hour)| 24,000| 30,000| 36,000| 42,000| 42,000| 48,000|
48,000
Nominal Airflow (CFM)| 800| 1,000| 1,200| 1,400| 1,400| 1,600| 1,600
W – Width (in.)| 18 1/8| 18 1/8| 18 1/8| 18 1/8| 18 1/8| 18 1/8| 18 1/8
H – Height (in.)| 18| 18| 18| 18| 25| 25| 29
D – Depth (in.)| 19 1/2| 19 1/2| 19 1/2| 19 1/2| 19 1/2| 19 1/2| 19 1/2
Connection – Liquid Line (in.)| 3/8| 3/8| 3/8| 3/8| 3/8| 3/8| 3/8
Connection – Suction Line (in.)| 3/4| 3/4| 3/4| 7/8| 7/8| 7/8| 7/8
NOTES:
-
Individual restrictors are available by part number – PN664 (where represents the size).
Example: 664103 is a restrictor 0.103 in diameter. -
Refer to sales specification sheets for Listed/Certified combinations of equipment and required accessories.
-
Refer to the current AHRI directory for certified ratings of split systems.
Table 1. Coil Specifications INSTALLER: PLEASE LEAVE THESE INSTRUCTIONS WITH THE EQUIPMENT OWNER.
10409960
(NEW)
Specifications & illustrations subject to change without notice or incurring
obligations (03/22).
O’Fallon, MO, © Nortek Global HVAC LLC 2022. All Rights Reserved.
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