Daikin DZ18VC Series User manual
Our continuing commitment to quality products may mean a change in specications without notice.
© 2015 - 2016, 2018, 2020
19001 Kermier Rd., Waller, TX 77484
www.daikincomfort.com
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.
!
D
M
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WARNING
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UMP
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UMP
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CAUTION
Always keep the unit upright; laying the unit on its side or top
may cause equipment damage. Shipping damage, and sub-
sequent investigation is the responsibility of the carrier. Verify
the model number, specications, electrical characteristics,
and accessories are correct prior to installation. The distributor
or manufacturer will not accept claims from dealers for trans-
portation damage or installation of incorrectly shipped units.
INSTALLATION INSTRUCTIONS
IOD-4016H
4/2020
Index
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5
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11
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16
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28
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WARNING
Cancer and Reproductive Harm -
www.P65Warnings.ca.gov
0140M00517-A
2
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 20 hours of operation.
Rated performance is delivered at the specied airow. See
outdoor unit specication sheet for split system models or
product specication sheet for packaged and light commercial
models. Specication sheets can be found at www.daikincom-
fort.com for Daikin 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 specication sheet.
Should you
have any questions please contact the local oce of the EPA.
If replacing a condensing unit, heat pump or air handler, the
system must be manufacturer approved and Air Conditioning,
Heating and Refrigeration Institute (AHRI) matched.
The installation of an inverter heat pump with un-
matched system units will not allow for proper operation.
I
IS
.
NOTICE
Outdoor inverter units are approved for operation above 0°F
in cooling mode and -20°F (RH10%) in heating mode with no
additional kit necessary.
Damage resulting from operation of the unit in a structure
that is not complete (either as part of new construction or
renovation) is not covered by our warranties.
This heat pump is part of a system that uses inverter tech-
nology to more eciently remove or add heat with better
eciency and achieve the target comfort conditions. System
may ONLY be installed using a Daikin communicating ther-
mostat. The communicating system reduces the number of
required thermostat wires, provides additional setup features
and enhanced active diagnostics. Due to components using
inverter technology, the heat pump will not function properly
if used with a non-approved thermostat.
.
ONE
NOTICE
Special consideration must be given to location of the heat
pump 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 un-
obstructed; however, if vertical conditions require placement
beneath an obstruction
The specied dimensions meet requirements for air circulation
only. Consult all appropriate regulatory codes prior to deter-
mining nal 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.
OK!
OK!
AA AAA
A
CC
CC
OK!
OK!
OK!
OK!
NOT
AA
AA AA
AA
AA
B B B
B
A B C AA
10" 10" 18" 20"
12" 12" 18" 24"
This unit can be located at ground oor level or on at roofs.
At ground oor level, the unit must be on a solid, level foun-
dation 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.
Care should be taken to ensure the unit is installed away
from noise sensitive locations such as bedrooms, windows
and outdoor living areas. Ensure the foundation is sucient
to support the unit. A concrete slab raised above ground level
provides a suitable base.
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 heat pump unit legs or frame and the roof mounting as-
sembly to reduce noise vibration.
3
The unit should be well grounded so that potential eects of
electrical noise from the inverter to surrounding equipment
can be minimized.
When selecting an installation location, keep sucient dis-
tance from the heat pump unit and wiring to radios, personal
computers, stereos, etc., as shown in the following gure.
Circuit
Breaker
(In.)
Radio, TV
60”ormore
To Indoor Unit and Thermostat
60”ormore
While these items will not cover every conceivable situation,
they should serve as a useful guide.
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WARNING
PUSH
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IS
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WARNING
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PSIG
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WARNING
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•S
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WARNING
IS
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CAUTION
Use only refrigerant grade (dehydrated and sealed) copper
tubing to connect the heat pump unit with the indoor unit. 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. The liquid line must be
insulated if more than 50 ft. of liquid line will pass through an
area that may reach temperatures of 30 °F or higher than
ambient in cooling mode and/or if the temperature inside
the conditioned space may reach a temperature lower than
ambient in heating mode. Never attach a liquid line to any
uninsulated potion of the gas line.
Do NOT let refrigerant lines come in direct contact with plumb-
ing, ductwork, oor joists, wall studs, oors, 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
lled 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
gas line.
Insulation is necessary to prevent condensation from form-
ing and dropping from the gas line. Armex 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 and connections from damage and
contamination.
4
Maximum vertical
separation of 200 ft.
*Includes pressure losses of any elbows, bends, etc.
Maximum line set
equivalent length of 125 ft*.
The maximum line set
actual length is 100 ft.
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 refriger-
ant, the indoor coil and metering device must be replaced.
Only DV**PEC air handlers are compatible and have been
manufacturer approved for use with these models. See unit
specications or AHRI for an approved system match.
23/4 3/8
37/8 3/8
41 1/8 3/8
51 1/8 3/8
LONG RADIUS
STREET ELL
SHORT RADIUS
STREET ELL
STREET
ELL
Maximum line set
equivalent length of 125 ft*.
The maximum line set actual length is 100 ft.
*Includes pressure losses of any elbows, bends, etc.
5
To avoid overheating the service valve, EEV, 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
nish 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 PVE 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. A bi-ow lter drier is shipped with the unit as a separate
component and must be brazed on by the installer on-
site. Ensure the bi-ow lter drier paint nish is intact
after brazing. If the paint of the steel lter drier has
been burned or chipped, repaint or treat with a rust
preventative.
The recommended location of the lter drier is before
the expansion device at the indoor unit.
Be careful not to kink or dent refrigerant lines. Kinked
or dented lines will cause poor performance or compressor
damage.
HIGH
.
WARNING
PSIG
.
WARNING
To locate leaks, pressure test the system using dry nitrogen or
leak detector uid per Daikin’s recommendation. If you wish
to use a leak detector, charge the system to 10 psi using the
appropriate refrigerant then use nitrogen to nish 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
Adequate refrigerant charge for the matching indoor coil and
15 feet of line set is supplied with the heat pump unit. If liquid
line set exceeds 15 feet in length, refrigerant should be added
at 0.6 ounces per foot of liquid line.
.
NOTICE
HIGH
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NOTICE
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WARNING
SUCH
IS
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CAUTION
U
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IS
CAUTION
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