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Installing and servicing heating and air conditioning equipment can
be hazardous due to system pressure and electrical components.
Only trained and qualified service personnel should install, repair
or service heating and air conditioning equipment. Untrained
personnel can perform the basic maintenance functions of cleaning
coils and cleaning and replacing filters. All other operations should
be performed by trained service personnel. When working on
heating and air conditioning equipment, observe precautions in
the literature, tags and labels attached to the unit and other safety
precautions that may apply, such as the following safety measures:
• Follow all safety codes.
• Wear safety glasses and work gloves.
• Use a quenching cloth for brazing operations.
• Have a fire extinguisher available for all brazing operations.
Moving and Storage
Move units in the normal “up” orientation. Units may be moved
and stored per the information on the packaging. Do not stack
more than three units in total height. Do not attempt to move units
while stacked. When the equipment is received, all items should
be carefully checked against the bill of lading to be sure all crates
and cartons have been received. Examine units for shipping
damage, removing the units from the packaging if necessary. Units
in question should also be internally inspected. If any damage is
noted, the carrier should make the proper notation on the delivery
receipt, acknowledging the damage.
Split Unit Location
Locate the split compressor section away from areas that may
disturb the customer and in a way that allows easy removal of the
access panels and the top of the cabinet. Provide sufficient room
to make water, electrical and refrigerant line connections and allow
space for service personnel to perform maintenance. The NDS
split is approved for outdoor installation when properly installed.
Air Coil Location
Refer to the air handler manufacturer’s instructions for the blower
coil unit for details on installing the air handling portion of the system.
Condensate Drain
Follow the blower coil manufacturer’s instructions.
WARNING: Before performing service or
maintenance operations on a system, turn off main
power switches to both units. Turn off accessory
heater power switch if applicable. Electrical
shock could cause personal injury. Installing and
servicing heating and air conditioning equipment
can be hazardous due to system pressure and
electrical components. Only trained and qualified
service personnel should install, repair or service
heating and air conditioning equipment.
Duct System
All blower coil units/air coils must be installed as specified by the
manufacturer’s installation instructions; however, the following
recommendations should considered to minimize noise and
service problems.
An air filter must always be installed upstream of the air coil on
the return air side of the air handler or furnace. If there is limited
access to the filter rack for normal maintenance, it is suggested
that a return air filter grill be installed. Be sure that the return duct
is properly installed and free of leaks to prevent dirt and debris
from bypassing the filter and plugging the air coil.
In applications using galvanized metal ductwork, a flexible duct
connector is recommended on both the supply and return air
plenums to minimize vibration from the blower. To maximize sound
attenuation of the unit blower, the supply and return plenums
should include an internal duct liner of 1-inch thick glass fiber or
be constructed of ductboard. Insulation is usually not installed in
the supply branch ducts. Ducts in unconditioned areas should be
wrapped with a minimum of 1-inch duct insulation. Application of
the unit to uninsulated ductwork in an unconditioned space is not
recommended as the unit’s performance will be adversely affected.
If the air handler is connected to existing ductwork, a previous
check should have been made to assure that the duct system has
the capacity to handle the air required for the unit application. If
ducting is too small, as in replacement of heating only systems,
larger ductwork should be installed. All existing ductwork should be
checked for leaks and repairs made accordingly. The duct systems
and diffusers should be sized to handle the design airflow quietly.
If air noise or excessive airflow is a problem, the blower speed can
be changed to a lower speed to reduce airflow. This will reduce the
performance of the unit slightly in heating; however, it will increase
the temperature rise across the air coil. Airflow must still meet
minimum requirements.
Equipment Selection
The following guidelines should be used when mating a
Outdoor Split to an air handler/coil.
• Select R-410A components only.
• Match the air handler to the air handler coil data table.
• Indoor matching adjustable TXV is factory installed on every
air handler/coil. Fixed orifice or cap tube systems should not
be used.
• Minimum of two (2) blower speeds
Utilizing Existing Coil or Air Handler
It is recommended that a new R-410A air handler be installed with a
Outdoor Split considering the long term benefits of reliability, warranty,
etc. versus the short term installation cost savings. However, the
existing air handler may be retained provided the following:
•
Coil currently is R-410A rated
•
Coil uses a TXV. No capillary or fixed orifice systems should
be used
•
A life expectancy of more than 7 years remaining for the air
handler and components
•
Flush air coil and line set
Safety Considerations
General Installation Information
AFFINITY DUAL-CAPACITY OUTDOOR SPLIT SERIES INSTALLATION MANUAL
