Nordyne R-410A User Manual 2
USER’s MANUAL & INSTALLATION INSTRUCTIONS
2 Stage R-410A Single Package Heat Pump
15 SEER
IMPORTANT
Please read this information thoroughly and become familiar with the capabilities
and use of your appliance before attempting to operate or maintain this unit.
Keep this literature where you have easy access to it in the future. If a problem
occurs, check the instructions and follow recommendations given. If these
suggestions don’t eliminate your problem, call your NORDYNE Servicing
Contractor (Service PRO).
These instructions are primarily intended to assist qualifi ed 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.
DO NOT DESTROY. PLEASE READ CAREFULLY AND
KEEP IN A SAFE PLACE FOR FUTURE REFERENCE.
SAFETY INFORMATION ...............................3
USER INFORMATION ...................................3
About the Heat pump ................................ 3
Operating Instructions ...............................3
Cooling Operation ...................................3
Heating Operation ...................................3
Emergency Heat ..................................... 3
Defrost ....................................................3
System Shutdown ...................................4
Warranty Information .................................4
INSTALLER INFORMATION ..........................4
General Information ...................................4
Pre - Installation Check .............................4
Inspecting Equipment ................................ 4
HEAT PUMP INSTALLATION ........................5
Locating the Heat pump ...........................5
Unpacking the Unit ................................... 5
Minimum Clearances ................................5
Service Access Clearance ........................ 5
Clearances to Combustibles ..................... 5
Duct Requirements ...................................5
CONDENSATE DRAINAGE ........................... 5
INSTALLING RETURN and SUPPLY
FITTINGS ....................................................6
Supply Duct .............................................. 6
Return Duct ..............................................6
LOCATING and INSTALLING the
RETURN AIR ASSEMBLY .............................6
LOCATING and INSTALLING the
SUPPLY DAMPERS .......................................7
DUCTING SYSTEM .......................................7
Connecting the Return and Supply Air
Flexible Ducts ............................................ 8
Blower Speed ...........................................8
Defrost Cycle Control ................................9
Ambient Sensor Mounting .......................11
Electric Heat Package .............................11
SYSTEM OPERATION .................................12
Pre - Start Checklist .................................12
Start - Up Procedure ...............................12
Air Circulation .......................................12
System Heating ....................................12
System Cooling ....................................12
Short Cycle Protection..........................12
Emergency Heat ...................................12
Defrost Test Procedure ............................12
Anti Short Cycle Timer Test .....................13
Heating Mode .......................................13
Cooling Mode .......................................13
ADJUSTMENT of REFRIGERANT
CHARGE ..................................................13
Charging an R410A Unit in AC
Mode at Outdoor Temperature
above 65° F ...........................................1 3
Charging an R410A Unit in
Heating Mode ........................................1 3
REFRIGERANT CHARGING CHARTS
for COOLING MODE of OPERATION .........14
Figure 11 - 2 Ton Units ............................14
Figure 12 - 3 Ton Units ............................14
Figure 13 - 4 Ton Units ............................15
Figure 14 - 5 Ton Units ............................15
REFRIGERANT CHARGING TABLES
for HEATING MODE of OPERATION ..........16
Charging Tables - 2 & 3 Ton Units............16
Charging Tables - 4 & 5 Ton Units............17
WIRING DIAGRAMS ....................................18
Figure 15 - 2 & 3 Ton Units ...........................18
Figure 16 - 2 & 3 Ton Units ...........................19
ELECTRICAL CONNECTIONS .....................8
High Voltage ..............................................8
Low Voltage ...............................................8
Overcurrent Protection...............................9
Locating the Thermostat ............................9
2 - Speed Outdoor Fan Motor .................... 9
Low Pressure Switch ................................. 9
High Pressure Switch ................................ 9
2
SAFETY INFORMATION
IMPORTANT: 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.
USER INFORMATION
About the Heat Pump
Your heat pump is a unique, all weather comfortcontrol appliance that will heat and cool your
home year round and provide energy saving
comfort. It’s an unknown fact that heat is always
in the air, even when the outside temperature is
below freezing. The heat pump uses this basic
law of physics to provide energy saving heat
during the winter months. For example, If the
outdoor temperature is 47° F (8° C), your heat
pump can deliver approximately 3.5 units of
heat energy per each unit of electrical energy
used, as compared to a maximum of only 1
unit of heat energy produced with conventional
heating systems.
In colder temperatures, the heat pump performs
like an air conditioner run in reverse. Available
heat energy outside the home is absorbed by the
refrigerant and exhausted inside the home. This
effi cient process means you only pay for “moving”
the heat from the outdoors to the indoor area. You
do not pay to generate the heat, as is the case
with more traditional furnace designs.
During summer, the heat pump reverses the fl ow
of the heat-absorbing refrigerant to become an
energy-effi cient, central air conditioner. Excess
heat energy inside the home is absorbed by the
refrigerant and exhausted outside the home.
Operating Instructions
Cooling Operation
1. Set the thermostat’s system mode to COOL
or AUTO and change the fan mode to AUTO.
See Figure 1
2. Set the temperature selector to the desired
temperature level. The outdoor fan,
compressor, and blower motor will all cycle
on and off to maintain the indoor temperature
at the desired cooling level.
NOTE: If the temperature level is re-adjusted, or
the system mode is reset, the fan and compressor
in the outdoor unit may not start immediately. A
protective timer circuit holds the compressor
and the outdoor fan off for approximately three
minutes following a previous operation or the
interruption of the main electrical power.
Heating Operation
1. Set the thermostat’s system mode to HEAT
or AUTO and change the fan mode to AUTO.
See Figure 1.
2. Set the temperature selector to the desired
temperature level. The compressor, outdoor
fan, and blower motor will cycle on and off to
maintain the indoor temperature at the desired
heating level.
NOTE: If the temperature level is re-adjusted, or
the system mode is reset, the fan and compressor
in the outdoor unit may not start immediately. A
protective timer circuit holds the compressor
and the outdoor fan off for approximately three
minutes following a previous operation or the
interruption of the main electrical power.
Emergency Heat
Some thermostats may include a system mode
called EM HT or AUX HT, etc. This is a backup heating mode that should only be used if a
problem is suspected. With the mode set to EM
HT, etc., the compressor and outdoor fan will
be locked off and supplemental heat (electric
resistance heating) will be used as a source of
heat. Sustained use of electric resistance heat in
place of the heat pump will result in an increase
in electric utility costs.
Fan
Mode
Figure 1. Digital Thermostat
System
Mode
Temperature
Selector
Defrost
During cold weather heating operation, the
outdoor unit will develop a coating of snow
and ice on the heat transfer coil. This is normal
and the unit will defrost itself. This unit features
Adaptive Demand Defrost that monitors ambient
and coil temperatures to regulate the defrost
function accordingly.
3
At the beginning of the defrost cycle, both the
outdoor condenser fan and compressor will
turn off. After approximately 30 seconds, the
compressor will turn on and begin to heat the
outdoor coil causing the ice and snow to melt.
NOTE: While the ice and snow is melting, some
steam may rise from the outdoor unit as the warm
coil causes the melting frost to evaporate. When
defrost is completed, the outdoor fan motor will
start, and the compressor will turn off again. In
approximately 30 seconds the compressor will
start up again and continue normal operation.
System Shutdown
Change the thermostat’s system mode to OFF
and the fan mode to AUTO (See Figure 1).
NOTE: The system will not operate, regardless
of the temperature selector setting.
Warranty Information
A warranty certificate with full details is
included with the heat pump. Carefully review
these responsibilities with your dealer or
service company. The manufacturer will not be
responsible for any costs found necessary to
correct problems due to improper setup, improper
installation, adjustments, improper operating
procedure on the part of the user, etc. Some
specifi c examples of service calls which are not
included in the limited warranty are:
1. Correcting wiring problems in the electrical
circuit supplying the heat pump.
2. Resetting circuit breakers or other switches.
3. Adjusting or calibrating of thermostat.
INSTALLER INFORMATION
General Information
The installer should 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 and
the National Electrical Code (ANSI CI) for special
installation requirements. Read the following
instructions completely before performing
the installation.
Some states require installation and service
personnel to be licensed. Unqualifi ed individuals
should not attempt to interpret these
instructions or install this equipment.
This equipment contains R-410A refrigerant
under high pressure. Installation or servicing
should only be performed by qualifi ed trained
personnel thoroughly familiar with this type
equipment and related system components.
CAUTION:
This unit uses refrigerant R-410A. DO NOT
under any circumstances use any other
refrigerant in this unit. Use of another
refrigerant will damage the unit.
Single packaged heat pumps are ready for easy
and immediate installation and can be readily
connected into the high static duct system of a
home. This unit is completely assembled, wired,
and run tested at the factory. This heat pump
is designed for outdoor installation only. The
only connections needed for installation are the
supply and return ducts, the line voltage, and
thermostat wiring. A complete heat pump system
typically consists of:
• Single Package Heat Pump
• Home Fittings Kit
• Unit Fittings Kit
• 2-Stage Cooling/Heating Thermostat
Use of components other than those specifi ed
may invalidate ARI Certifi cation, Code Agency
Listing, and limited warranty on the air
conditioner.
Pre-Installation Check
Before you install this unit, the cooling load of
the area to be conditioned must be calculated
and a system of the proper capacity selected. It
is recommended that the area to be conditioned
be completely insulated and vapor sealed.
The electrical supply should be checked to
determine if adequate power is available. If there
is any question concerning the power supply,
contact the local power company.
CAUTION:
To prevent personal injury and/or
equipment damage, check thermostat
manufacturer’s operation of fan relay
circuit when in EMER HEAT. When
the thermostat system mode is in the
EMER HEAT position, the thermostat
must energize the fan relay when the
fan mode is in the AUTO position.
Inspecting Equipment:
All units are securely packed at the time of
shipment and, upon arrival, should be carefully
inspected for damage. Claims for damage
(apparent or concealed) should be filed
immediately with the carrier.
4
HEAT PUMP INSTALLATION
Locating the Heat pump
• Select a solid, level position, preferably on a
concrete slab, slightly above the grade level,
and parallel to the home. DO NOT PLACE
UNIT UNDER THE HOME.
• The hot condenser air must be discharged up
and away from the home, and if possible, in a
direction with the prevailing wind.
• Do not place the unit in a confi ned space.
• If practical, place the heat pump and its ducts
in an area where they will be shaded from
the afternoon sun, when the heat load is
greatest.
• If possible, select a site for the unit that is as
close as possible to the proposed return grille
location.
• The length of the supply and return ducts
should be kept to a minimum with no sharp
radius bends.
Unpacking the Unit
It is recommended that the unit be unpacked
at the installation site to minimize damage due
to handling.
CAUTION:
Do not tip the unit on its side. Oil
may enter the compressor cylinders
and cause starting trouble. If unit has
been set on its side, restore to upright
position and do not run for several
hours. Then run unit for a few seconds.
Do this three or four times with fi ve
minutes between runs.
1. Remove the bands from around the unit.
2. Unfold the top and bottom cap fl anges.
3. Carefully remove the top cap and tube.
Minimum Clearances
Minimum clearances MUST be maintained from
adjacent structures to provide room for proper
servicing and air circulation. See Figure 2. DO
NOT install unit in a confi ned or recessed area that
will allow discharge air from the unit to re-circulate
into the condenser air inlet, through the coil.
6 ft.
24"
12"
12"
Figure 2. Minimum Unit Clearances
Clearances to Combustible Materials:
Combustible Base (Wood or Class A, B, or C
roof Covering material) ...............................0”
Supply and Return Air Ducts .......................0”
Duct Connection side ..................................0”
Duct Requirements
The supply duct system, including the number
and type of registers, will have much more
effect on the performance of an air conditioning
system then any other factor. The duct must be
suffi ciently large to conduct an adequate amount
of air to each register.
CONDENSATE DRAINAGE
A 3/4” condensate fi tting extends out of the side
of the unit (Figure 3). The drain trap, shipped in
the electrical compartment, must be installed to
prevent water from collecting inside the unit.
1. Thread the elbow provided with the unit into
the drain connection until hand tight.
2. Connect the condensate tubing onto the fi tting,
forming a trap near the drain connection.
3. Route the condensate tube from the trap to
a suitable drain. NOTE: For proper drainage,
make sure the trap is level to the ground and
tubing outlet is below trap level.
Elbow
Service Access Clearance:
Blower access panel side .......................... 24”
Electrical compartment access panel side .. . 12”
Clearance between overhang and
top of unit ...............................................72”
Clearance around condenser coil area to
wall or shrubs (excludes duct panel side) .. 12”
P-Trap
Figure 3. Drain Trap
5
INSTALLING RETURN AND
SUPPLY AIR FITTINGS
The supply and return fi ttings are included with
the unit and located in the supply duct. They
attach to the unit openings (Figure 4) with a
fl ange and bead arrangement and may be,
secured with two sheet metal screws. Note: For
easier access, install fi ttings before positioning
unit in fi nal location.
Supply Duct
1. Position the supply duct collar so the edge of
the unit opening fi ts between the fl ange and
the bead.
2. Overlap the collar ends keeping the small
screw holes underneath.
3. Align the holes in the crimped area and install
one screw. Note: It may be necessary to loosen
the four screws that hold the transition duct
in order to install the supply fi tting. Re-tighten
when installation is complete.
4. Tap collar (if necessary) to ensure engagement
with unit opening and install second screw.
5. Tighten fi rst screw and rotate collar clockwise
so joint is near three o’clock position.
Return Duct
1. Align the slots with the holes in the collar and
install two screws.
2. Position the collar over the opening and align
the four notches in the collar with the four
dimples in the panel.
3. Using self-drilling screws (10-16x.5) attach
the collar to the rear panel.
LOCATING AND INSTALLING THE
RETURN AIR ASSEMBLY
To simplify installation, locate and install the
return air assembly fi rst. If desired, the return
opening can be located inside a closet with
louvered doors that has an open area equal to
or greater than the 12” x 20” grille furnished. The
return air grille can be placed in the wall of a closet
and the air ducted into the fi lter box through a
boxed-in area at the closet fl oor level. Make sure
the fi lter is readily accessible.
NOTE: The return air box with grille and fi lter
(Figure 5) should not be located in heavy traffi c
areas like hallways or center of rooms. A good
spot is in a corner or under a table, if a minimum
two inch clearance is available.
1. Start the installation from under the home by
cutting a small hole in the subfl oor. Determine
how the fl oor joist location will affect cutting
the opening needed for the return air box.
NOTE: Floor joists are generally located on
16” centers, leaving 14-3/8” between joists.
2. After measuring the return air box
(approximately 12-1/4” x 20-1/4”), cut the
hole through the fl oor so that the box will fi t
between the fl oor joists. Care should be taken
when cutting through carpeting to avoid snags.
NOTE: In most installations it will be necessary
to cut a similar hole in the fi berboard directly
under the hole in the fl oor. However, if the fl oor
is more than ten inches deep, it will only be
necessary to cut a hole for the collar on the
return air box or for the insulated duct.
3. Set the box into the opening and fasten with
screws or nails.
4. Put the fi lter and return air grille in place.
Transition Duct Screws
Supply Air
14” Duct Dimples
Return Air
Figure 4. Return and Supply Air Fittings
6
Figure 5. Return Air Box
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