Daikin DZ13SC Installation Instructions Manual

INSTALLATION INSTRUCTIONS

CONDENSING UNIT

HEAT PUMP
INSTALLATION & SERVICE REFERENCE

Important Safety Instructions

The following symbols and labels are used throughout this manual
to indicate immediate or potential safety hazards. It is the owner’s
and installer’s responsibility to read and comply with all safety
information and instructions accompanying these symbols. Fail­ure to heed safety information increases the risk of personal in­jury, property damage, and/or product damage.

HIGH VOLTAGE!
Disconnect ALL power before servicing. Multiple
power sources may be present. Failure to do so may
cause property damage, personal injury or death .

ONLY individuals meeting th e r equiremen ts (at a minimum)
of an “Entry Level Technician” as specified by the Air
Conditioning, Heating, and Refrigeration Institute (AHRI) may
use this information. At tem pt ing t o inst a ll o r repair this unit
without such background may result in product damage,
personal injury, or death.

Codes & Regulations

This product is designed and manufactured to comply with na­tional codes. Installation in accordance with such codes and/or
prevailing local codes/regulations is the responsibility of the in­staller. The manufacturer assumes no responsibility for equip­ment installed in violation of any codes or regulations. Rated
performance is achieved after 72 hours of operation. Rated per­formance is delivered at the specified airflow. See outdoor unit
specification sheet for split system models or product specifica­tion sheet for packaged and light commercial models. Specifica­tion sheets can be found at www.daikincomfort.com for Daikin
brand products. Within the website, please select the residential
or commercial products menu and then select the submenu for
the type of product to be installed, such as air conditioners or
heat pumps, to access a list of product pages that each contain
links to that model’s specification sheet.

The United States Environmental Protection Agency (EPA) has is­sued various regulations regarding the introduction and disposal
of refrigerants. Failure to follow these regulations may harm the
environment and can lead to the imposition of substantial fines.

Should you have any questions please contact the local office of
the EPA.

If replacing a condensing unit or air handler, the system must be
manufacturer approved and Air Conditioning, Heating and Refrig­eration Institute (AHRI) matched. NOTE: Installation of unmatched
systems is not allowed.

CAUTION

Scroll equipped units should never be used to evacuate the air
conditioning system. Vacuums this low can cause internal
electrical arcing resulting in a damaged or failed compressor.

Shipping Inspection

Always keep the unit upright; laying the unit on its side or top may
cause equipment damage. Shipping damage, and subsequent in­vestigation is the responsibility of the carrier. Verify the model
number, specifications, electrical characteristics, and accesso­ries are correct prior to installation. The distributor or manufac­turer will not accept claims from dealers for transportation dam­age or installation of incorrectly shipped units.

IOD-4002A
9/2013

Our continuing commitment to quality products may mean a change in specifications without notice.

© 2013

5151 San Felipe St., Suite 500, Houston, TX 77056

www.daikincomfort.com

Outdoor units are approved for operation above 55°F in cooling
mode. Operation below 55°F in cooling mode requires the use of
an approved low ambient kit.

Operating the unit in a structure that is not complete (either as
part of new construction or renovation) will void the warranty.

Installation Clearances

Special consideration must be given to location of the condensing
unit(s) in regard to structures, obstructions, other units, and any/
all other factors that may interfere with air circulation. Where
possible, the top of the unit should be completely unobstructed;
however, if vertical conditions require placement beneath an ob­struction there should be a minimum of 60 inches between the
top of the unit and the obstruction(s). The specified dimensions
meet requirements for air circulation only. Consult all appropri­ate regulatory codes prior to determining final clearances.

Another important consideration in selecting a location for the
unit(s) is the angle to obstructions. Either side adjacent the valves
can be placed toward the structure provided the side away from
the structure maintains minimum service clearance. Corner in­stallations are strongly discouraged.

In more severe weather locations, it is recommended that the unit
be elevated to allow unobstructed drainage and air flow. The
following elevation minimums are recommended:

Des ign T em perature

+15° and above 2 1/2"

-5° to +14 ° 8"
belo w -5 ° 12"

Suggested

Minimum Elevation

Safe Refrigerant Handling

While these items will not cover every conceivable situation, they
should serve as a useful guide.

To avoid possible injury, explosion or death, practice safe
handling of refrigerants.

Mi ni m um Ai rf l ow Clea ra nce

Model Type A B C AA

Residential 10" 10" 18" 20"

Light Co mmercial 12" 12" 18" 24"

This unit can be located at ground floor level or on flat roofs. At
ground floor level, the unit must be on a solid, level foundation
that will not shift or settle. To reduce the possibility of sound
transmission, the foundation slab should not be in contact with
or be an integral part of the building foundation. Ensure the foun­dation is sufficient to support the unit. A concrete slab raised
above ground level provides a suitable base.

Rooftop Installations

If it is necessary to install this unit on a roof structure, ensure the
roof structure can support the weight and that proper consider­ation is given to the weather-tight integrity of the roof. Since the
unit can vibrate during operation, sound vibration transmission
should be considered when installing the unit. Vibration absorb­ing pads or springs can be installed between the condensing unit
legs or frame and the roof mounting assembly to reduce noise
vibration.

NOTE: These units require special location consideration in areas
of heavy snow accumulation and/or areas with prolonged
continuous subfreezing temperatures. Heat pump unit bases have
cutouts under the outdoor coil that permit drainage of frost
accumulation. Situate the unit to permit free unobstructed drainage
of the defrost water and ice.

To avoid possible explosion:

•

Never apply flame or steam to a refrigerant cylinder. If you
must heat a cylinder for faster charging, partially immerse
it in warm water.

•

Never fill a cylinder more than 80% full of liquid refrigerant.

• Never add anything other than R-22 to an R-22 cylinder or
R-410A to an R-410A cylinder. The service equipment used
must be listed or certified for the type of refrigerant used.

• Store cylinders in a c ool, dry p la c e . Never use a cylind er
as a platform or a roller.

To avoid possible explosion, use only returnable (not disposable)
service cylinders when removing refrigerant from a system.

• Ensure the cylinder is free of damage which could lead to a
leak or explosion.

• Ensure the hydrostatic test date does not exceed 5 ye a rs.

• Ensure the pressure rating meets or exceeds 400 lbs.
When in doubt, do not use cylinder.

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Refrigerant Lines

8

8

CAUTION

The compressor POE oil for R-410A units is extremely susceptible
to moisture ab so rpt i on and could cause compr e s sor fa i lur e. Do
not leave system open to atmosphere any longer than necessary
for installation.

Use only refrigerant grade (dehydrated and sealed) copper tubing
to connect the condensing unit with the indoor evaporator. After
cutting the tubing, install plugs to keep refrigerant tubing clean
and dry prior to and during installation. Tubing should always be
cut square keeping ends round and free from burrs. Clean the
tubing to prevent contamination.

Do NOT let refrigerant lines come in direct contact with plumbing,
ductwork, floor joists, wall studs, floors, and walls. When run­ning refrigerant lines through a foundation or wall, openings
should allow for sound and vibration absorbing material to be
placed or installed between tubing and foundation. Any gap be­tween foundation or wall and refrigerant lines should be filled
with a pliable silicon-based caulk, RTV or a vibration damping
material. Avoid suspending refrigerant tubing from joists and studs
with rigid wire or straps that would come in contact with the
tubing. Use an insulated or suspension type hanger. Keep both
lines separate and always insulate the suction line.

These sizes are recommended for line lengths of 79 feet or less to
obtain optimum performance. For alternate line sizing options or
runs of more than 79 feet, refer to Remote Cooling Service Manual,
or TP-107 Long Line Set Application R-410A, or contact your dis­tributor for assistance.

RECOMMENDE D INTERCONNECTING TUBING (Ft )

Cond

Unit

Tons Suct Liq Suct Liq Suct Liq

1 1/2 5/8 1 /4 3/ 4 3/8 3/4 3/8

2 5/81/43/43/83/43/8

2 1/2 5/8 1/4 3/4 3/8 7/8 3/8

3 3/4 3/8 7 / 8 3/ 8 1 1/8 3 / 8

3 1/2 7/

47/
5 7/8 3/81 1/83/81 1/83/8

* Lines gr eater t h an 79 feet i n leng th or ve rti cal el evatio n cha nges more
than 50 feet refer to the Remote Cooli ng S ervice Manual or cont act your

distributor for assistance.

0-24 25-49 50-79*

Line Diameter (In. OD)

3/81 1/83/81 1/83/8
3/81 1/83/81 1/83/8

Insulation is necessary to prevent condensation from forming
and dropping from the suction line. Armflex (or satisfactory
equivalent) with 3/8” min. wall thickness is recommended. In
severe conditions (hot, high humidity areas) 1/2” insulation may
be required. Insulation must be installed in a manner which
protects tubing from damage and contamination.

Where possible, drain as much residual compressor oil from ex­isting systems, lines, and traps; pay close attention to low areas
where oil may collect. NOTE: If changing refrigerant types, ensure
the indoor coil and metering device is compatible with the type of
refrigerant being used; otherwise, the indoor coil must be replaced.

Burying Refrigerant Lines

If burying refrigerant lines can not be avoided, use the following
checklist.

1. Insulate liquid and suction lines separately.

2. Enclose all underground portions of the refrigerant lines in
waterproof material (conduit or pipe) sealing the ends where
tubing enters/exits the enclosure.

3. If the lines must pass under or through a concrete slab,
ensure lines are adequately protected and sealed.

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Refrigerant Line Connections

IMPORTANT

To avoid overheating the service valve, TXV valve, or filter
drier while brazing, wrap the component with a wet rag, or
use a thermal heat trap compound. Be sure to follow the
manufacturer’s instruction when using the heat trap
compound. Note: Remove Schrader valves from service valves
before brazing tubes to the valves. Use a brazing alloy of 2%
minimum silver content. Do not use flux.

Torch heat required to braze tubes of various sizes is
proportional to the size of the tube. Tubes of smaller size
require less heat to bring the tube to brazing temperature
before adding brazing alloy. Applying too much heat to any
tube can melt the tube. Service personnel must use the
appropriate heat level for the size of the tube being brazed.
Note: The use of a heat shield when brazing is recommended
to avoid burning the serial plate or the finish on the unit.

1. The ends of the refrigerant lines must be cut square, de­burred, cleaned, and be round and free from nicks or dents.
Any other condition increases the chance of a refrigerant
leak.

2. “Sweep” the refrigerant line with nitrogen or inert gas dur­ing brazing to prevent the formation of copper-oxide inside
the refrigerant lines. The POE oils used in R-410A applica­tions will clean any copper-oxide present from the inside of
the refrigerant lines and spread it throughout the system.
This may cause a blockage or failure of the metering device.

3. After brazing, quench the joints with water or a wet cloth to
prevent overheating of the service valve.

4. Ensure the filter drier paint finish is intact after brazing. If
the paint of the steel filter drier has been burned or chipped,
repaint or treat with a rust preventative. This is especially
important on suction line filter driers which are continually
wet when the unit is operating.

NOTE: Be careful not to kink or dent refrigerant lines. Kinked or
dented lines will cause poor performance or compressor damage.

Do NOT make final refrigerant line connection until plugs are
removed from refrigerant tubing.

Pressure test the system using dry nitrogen and soapy water to
locate leaks. If you wish to use a leak detector, charge the system
to 10 psi using the appropriate refrigerant then use nitrogen to
finish charging the system to working pressure then apply the
detector to suspect areas. If leaks are found, repair them. After
repair, repeat the pressure test. If no leaks exist, proceed to sys­tem evacuation.

System Evacuation

Condensing unit liquid and suction valves are closed to contain
the charge within the unit. The unit is shipped with the valve
stems closed and caps installed. Do not open valves until the

system is evacuated.

NOTE: Scroll compressors should never be used to evacuate or

pump down a heat pump or air conditioning system.

CAUTION

Prolonged operation at suction pressures less than 20 psig for
more tha n 5 seconds will result in overheat ing of the scrolls and
permanent damage to the scroll tips, drive bearings and internal
seal.

1. Connect the vacuum pump with 250 micron capability to the
service valves.

2. Evacuate the system to 250 microns or less using suction
and liquid service valves. Using both valves is necessary as
some compressors create a mechanical seal separating the
sides of the system.

3. Close pump valve and hold vacuum for 10 minutes. Typi­cally pressure will rise during this period.

NOTE: Before brazing, verify indoor piston size by checking the
piston kit chart packaged with indoor unit.

Leak Testing (Nitrogen or Nitrogen-Traced)

To avoid the risk of fire or e xplosion, never use oxygen, high
pressure air or flammable gases f o r l ea k testing of a refriger ation
system.

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