Nortek C84QA Series User manual

C84QA Series Split System Uncased Indoor Coils - Quick Connect
INSTALLATION INSTRUCTIONS
DO NOT DESTROY. PLEASE READ CAREFULLY AND KEEP IN A SAFE PLACE FOR FUTURE REFERENCE.
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.
IMPORTANT
For installation only in or with a mobile home furnace, modular blower, or designated air mover
that complies with HUD Manufactured Home Construction Safety Standard 24 CFR part 3280.

2
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:
This C84QA coil 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.
WARNING:
The C84QA series uncased indoor coil
is charged at the factory with an R-410A
refrigerant holding charge to prevent entrance
of moisture and contaminants during shipment.
Follow all charging instructions for maximum
unit performance and efficiency. Refrigerant
charging must be done by qualified personnel
familiar with safe and environmentally
responsible refrigerant handling procedures.
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:
PROPOSITION 65 WARNING: This product
contains chemicals known to the state of
California to cause cancer, birth defects or
other reproductive harm.
CAUTION:
This unit uses R-410A refrigerant with POE
oil. When servicing, cover or seal openings to
minimize the exposure of the refrigerant system
to air to prevent accumulation of moisture and
other contaminants.
• 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.

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GENERAL INFORMATION
C84QA series coils are designed for upflow or downflow
applications and incorporate single shot coupling
refrigerant connections for easy installation.
• 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.
• 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. See
Figures 2 - 5 (page 4). 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.
IMPORTANT:
For installation only in or with a mobile home
furnace, modular blower, or designated air
mover that complies with HUD Manufactured
Home Construction Safety Standard 24 CFR
part 3280.
Upflow Installations
1. Disconnect all electrical power to the furnace.
2. Install the coil on the furnace air discharge opening.
NOTE: It may be necessary to install the coil at the
air inlet opening if dictated in the furnace installation
instructions.
3. If needed, make a plate to adapt the coil to the air
discharge opening. See Figure 1 for coil dimensions.
4. Level the coil as needed to ensure proper condensate
drainage.
5. Make and install the plenum over the coil. Insulate as
required.
6. Seal the enclosure as required to minimize air leakage.
7.Connect the refrigerant lines as outlined in the
Refrigerant Line Connection section (page 4).
20" (508 mm)
Floor Cut Out
for Refrigerant Lines
and Drain Hose
3 3/4"
(95 mm)
5 3/8"
(133 mm)
19 1/16"
(500 mm)
AIR HANDLER OUTLINE
REAR WALL (CLOSET OR ALCOVE)
3/4" (19 mm)
Furnace Outer Door
4 1/2" (114 mm) MAX
Figure 1. Location of Floor Cut-Out for
Refrigerant Lines & Drain Hoses

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Downflow Installations
Downflow Electric Furnace:
1. Disconnect all electrical power to the furnace.
2. Select the appropriate coil conversion kit which includes
2 air filters, close-off plates (2 sets) and a coil hold down
bracket.
3. Remove the filter located at the top of the furnace
cabinet.
4. Remove the refrigerant line knockouts located at the
top and bottom of the furnace cabinet.
5. Install the coil and level it as needed to ensure proper
condensate drainage.
6. Secure the coil hold down bracket with screws.
7. Add air filters to the sides of the coil.
8. Cut the floor opening for the refrigerant lines and drain
line. See Figure 1 on page 3.
9.Connect the refrigerant lines as outlined in the
Refrigerant Line Connection section (page 4).
MOUNTING
HOLE
SMALL
PLATE
LARGE
PLATE
Figure 3. Bottom Close-Off Plates
SMALL
PLATE
TAB
LARGE
PLATE
TABS OFFSET
MOUNTING
HOLES (2)
TABS
Figure 4. Close-Off Plates for Opening
at Top of Furnace
Figure 2. Close-Off Plate Assembly
SMALL
PLATE
LARGE
PLATE TABS
MOUNTING
HOLE
OFFSET
Figure 5. Close-Off Plates
(Supplied w/ appropriate blower conversion package)
Downflow Furnace with Integral Coil Cabinet
or Optional Cabinet
1. Disconnect all electrical power to the furnace.
2. Remove the knockout in the left bottom corner of the
furnace and cut an appropriately sized hole in the floor.
See Figure 1. NOTE: For the optional cabinet, refer to
its installation instructions for assembly details.
3. Remove the interior coil panel. Install the coil and level
it as needed to ensure proper condensate drainage.
4. Remove the knockout for the refrigerant lines in the
secondary covers and replace in the furnace.
NOTE: Modifications to the panel may be required.
5. Slide the close-off plates around the refrigerant lines
and install the provided dart clips. See Figure 2.
6. Snap the bushings around the lines and into the close-
off panels.
7. Connect the refrigerant lines as outlined in the refrigerant
lines section.
Refrigerant Line Connections
The total system operating charge of R-410A is in the
outdoor unit and is adequate for the matched listed system
including 15 feet of line set.
1. Remove the protective caps from the coil and refrigerant
line set couplings.
2. With a soft, dust-free cloth, carefully wipe clean all
coupling threads and seals to remove any dust or
material which could contaminate the refrigerant system.
3. Using refrigerant oil, lightly lubricate the diaphragm,
seal, and mating threads.
4. Connect the couplings as follows:
a.) Line up the refrigerant line with the coil coupling and
thread together by hand to ensure proper thread
mating. Hold the hex of the male coupling with a
wrench and slowly wrench tighten the union nut until
a definite resistance (bottoming out) is felt.
b.) Mark the position of the union nut (match lines on the
line coupling and the coil coupling), then tighten the
coupling an additional 1/4 turn to ensure a leakproof
connection. Use the Torque Values table (below) if
a torque wrench is used.
5. Check the system for leaks.

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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:
1. The air filter installed with the system should be checked
and cleaned or replaced twice per year.
2. Check the coil, drain pan, and condensate drain line
for cleanliness at the start of each heating and cooling
season. Clean as needed.
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.

6
Figure 6. C84QA Coil Dimensions
H
14 1/2”
12 1/8”
19 1/2”
W
2 1/2”
1 3/8”
1”
F
Table 1. Coil Specifications
C84QA 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:
1. Refer to sales specification sheets for Listed / Certified combinations of equipment and required accessories.
2. Refer to the current AHRI directory for certified ratings of split systems.
COIL SPECIFICATIONS & DIMENSIONS

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INSTALLER: PLEASE LEAVE THESE
INSTRUCTIONS WITH THE EQUIPMENT OWNER.
10441310
(Replaces 1040997A)
Specifications & illustrations subject to change without notice or incurring obligations (10/22).
O’Fallon, MO, © Nortek Global HVAC LLC 2022. All Rights Reserved.