Nordyne MS3BC042KA, MS3BC024KA, MS3BC048KA, MS3BC036KA, MS3BC030KA Installation Instructions Manual
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Outdoor Air Conditioner
12 SEER Extra High Efficiency Split System
These units have been designed and tested for
capacity and effici encyin accordance with A. R.I.
Standards. Split System Heat Pump units are
designed for use with a wide variety of fossil fuel
furnaces, electric furnaces, air handlers, and
evaporator coil combinations.
These instructions are primarily intended to
assist qualified individuals experienced in the
proper installation of heating and/or air
conditioning appliances. Some local codes
require licensed installation/service personnel
for this type of equipment. Read all instructions
carefully before starting the installation.
USER'S INFORMATION
Read this owner information to become familiar
with the capabilities and use of your appliance.
Keep this with literature on other appliances
where you have easy access to it in the future.
If a problem occurs, check the instructions and
follow recommendations given. If these sug-
gestions don't eliminate your problem, call your
servicing contractor .
OPERATING INSTRUCTIONS
To Operate You rAir Conditioner for
Cooling
1. Set the thermostat system switch to COOL
or AUTO and the thermostat fan switch to
AUTO. (See Figure 1)
2. Set the thermostat temperature to the
desired temperature level using the tem-
perature selector. Please refer to the sepa-
rate detailed thermostat user's manual for
complete instructions regarding thermo-
stat programming. The outdoor unit and
indoor blower will both cycle on and off to
maintain the indoor temperature at the
desired cooling level.
To Operate Your Furnace for
Heating
1. Set the thermostat system switch to HEAT
or AUTO and the thermostat fan switch to
AUTO. (See Figure 1)
.
Set the thermostat temperature to the
desired temperature level using the tem-
perature selector. Please refer to the sepa-
rate detailed user's manual for complete
thermostat programming instructions. The
furnace and indoor blower will cycle on and
off to maintain the indoor temperature at
the desired heating level.
To Shut Off Your Air Conditioner
Set the thermostat system switch to OFF and the
thermostat fan switch to AUTO. (See Figure 1)
The system will not operate, regardless of the
thermostat temperature setting.
To Operate the Indoor Blower
Continuously
Set the thermostat fan switch to ON (See
Figure 1)
The indoor blower will start immediately, and
will run continually until the fan switch is reset to
AUTO.
SYSTEM SWITCH
FAN SWITCH
TEMPERATURESCALES
TEMPERATURE
SELECTOR
Figure 1. Typical Thermostat
The continuous indoor blower operation can be
obtained with the thermostat system switch set
in any position, including OFF.
The continuous indoor blower operation is
typically used to circulate the indoor air to
equalize a temperature unbalance due to a sun
load, cooking, or fireplace operation.
To Maintain Your Air Conditioner--
CAUTION:
Be certain the electrical power to the
outdoor unit and the furnace/air handler
is disconnected before doing the
following recommended maintenance.
1. Regularly:
a. Clean or replace the indoor air filter at the
start of each heating and cooling season,
and when an accumulation of dust and dirt
is visible on the air filter.
b. Remove any leaves and grass clippings
from the coil in the outdoor unit, being
careful not to damage the aluminum fins.
c. Check for any obstruction, such as twigs,
sticks, etc.
2. Before Each Cooling Season:
If the furnace/air handler blower motor and
the outdoor unit fan motor(s) have oil tubes
at the motor bearings, apply 10 drops of
SAE No. 20 motor oil to each oil tube.
CAUTION:
Do not over-oil, or oil motors not
factory-equipped with oil tubes. The
compressor is hermetically "sealed"
and does not require lubrication.
3. Before Calling a Service Technician,
Be Certain:
a. The unit thermostat is properly set -- see
"To Operate Your Air Conditioner for
Cooling" and "To Operate Your Furnace
for Heating."
b. The unit disconnect fuses are in good
condition, and the electrical power to the
unit is turned on.
1. GENERAL INFORMATION
Read the following instructions completely be-
fore performing the installation.
Condensing Unit Section-- Each condensing
unit is shipped with a refrigerant charge ad-
equate to operate the outdoor section with an
indoor matching coil or air handler, and 15 feet
of refrigeration line.
NOTE: DO NOT USE ANY PORTION OF THE
CHARGE FOR PURGING OR LEAKTESTING.
Matching coils and air handlers are shipped with
a small pressurized holding charge to pressur-
ize them to keep out contaminants. To release
the pressure, read the indoor section installa-
tion instructions carefully.
Liquid and Suction Lines-- Refrigerant grade
copper tubing should be used when installing
the system. Refrigerant suction line tubing
should be fully insulated.
Field Connections for Electrical Power
Supply -- All wiring must comply with current
provisions of the "National Electrical Code"
(ANSI/N FPA 70) and with applicable local codes
having jurisdiction. The minimum size of
electrical conductors and circuit protection must
be in compliance with information listed on the
outdoor unit data label.
2. SAFETY CONSIDERATIONS
Pressures within the System -- Split system
air conditioning equipment contains liquid and
gaseous refrigerant under pressure. Installa-
tion and servicing of this equipment should be
accomplished by qualified, trained personnel
thoroughly familiar with this type of equipment.
Under no circumstances should the Homeowner
attempt to install and/or service the equipment.
Labels, Tags, Precautions -- When working
with this equipment, follow all precautions in the
literature, on tags, and on labels provided with
the equipment. Read and thoroughly under-
stand the instructions provided with the equip-
ment prior to performing the installation and
operational checkout of the equipment.
Brazing Operations -- Installation of equip-
ment may require brazing operations. Safety
codes must be complied with. Safety equip-
ment (e.g.; safety glasses, work gloves, fire
extinguisher, etc.) must be used when perform-
ing brazing operations.
WARNING:
Ensure all electrical power to the unit is
off prior to installing or servicing the
equipment. Failure to do so may cause
personal injury or death.
3. SITE PREPARATION
Unpacking Equipment -- Remove the card-
board carton and User's Manual from the equip-
ment. Take care not to damage the tubing
connections when removing the carton.
Inspect for Damage-- Inspect the equipment
for damage prior to installing the equipment at
the job site. Ensure coil fins are straight and, if
necessary, comb fins to remove flattened and
bent fins.
Preferred Location of the Outdoor Unit at the
Job Site -- Conduct a survey of the job site to
determine the optimum location for mounting
the outdoor unit. Overhead obstructions, poorly
ventilated areas, and areas subject to accumu-
lation of debris should be avoided. The outdoor
unit must be installed in such a manner that
airflow through the coil is not obstructed and
that the unit can be serviced.
Facility Prerequisites-- Electrical power must
be supplied to the equipment. Electrical power
supplied must be adequate for proper operation
of the equipment. The system must be wired
and provided with circuit protection in accor-
dance with local building codes and the Na-
tional Electrical Code.
Minimum Circuit Ampacity-- Electrical wir-
ing to the equipment must be compatible and
in compliance with the minimum circuit ampacity
listed on the outdoor unit data label.
Maximum Fuse/Circuit Breaker Size-- Circuit
protection for the outdoor unit must be compat-
ible with the maximum fuse/circuit breaker size
listed on the outdoor unit data label.
4. INSTALLING THE OUTDOOR UNIT
Slab Mount -- The site selected for a slab
mount installation requires a stable foundation
and one not subject to erosion. The slab should
be level and anchored (if necessary) prior to
placing the equipment on the slab.
Cantilever Mount -- The cantilever mount
should be designed with adequate safety factor
to support the weight of the equipment, and for
loads subjected to the mount during operation.
Installed equipment should be adequately se-
cured to the cantilever mount and levelled prior
to operation of the equipment.
Roof Mount --The method of mounting should
be designed so as not to overload roof struc-
tures nor transmit noise to the interior of the
structure. Refrigerant and electrical line should
be routed through suitably waterproofed open-
ings to prevent water leaking into the structure.
5. INSTALLING THE INDOOR UNIT
The indoor section should be installed before
proceeding with routing of refrigerant piping.
Consult the installation instructions of the in-
door unit (i.e.: air handler, furnace, etc.) for
details regarding installation.
6. CONNECTING REFRIGERANT
TUBING BETWEEN THE
INDOOR AND OUTDOOR UNIT
General -- Once outdoor and indoor unit place-
ment has been determined, route refrigerant
tubing between the equipment in accordance
with sound installation practices. Refrigerant
tubing should be routed in a manner that mini-
mizes the length of tubing and the number of
bends in the tubing. Refrigerant tubing should
be supported in a manner that the tubing will not
vibrate or abrade during system operation. Tub-
ing should be kept clean of foreign debris during
installation and installation of a liquid line filter
drier is recommended ifcleanlinessor adequacy
of system evacuation is unknown or compro-
mised. Every effort should be made by the
installer to ensure that the field installed refrig-
erant containing components of the system
have been installed in accordance with these
instructions and sound installation practices so
as to insure reliable system operation and lon-
gevity. The maximum recommended intercon-
necting refrigerant line length is 75 feet, and the
vertical elevation difference between the indoor
and outdoor sections should not exceed 20
feet.
Filter Dryer Installation -- A filter dryer is
provided with PS series models only and must
be installed inthe liquid line of the system. If the
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