Installation manual

6
5 SERIES 500RO11 INSTALLATION MANUAL
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
When utilizing the existing air coil or line set, only flushing
compounds that vaporize should be used; which means
they are packaged in a pressurized disposable cylinder. It is
preferable to use a flushing agent that removes oil, water,
and acid, plus, is biodegradeable and non-toxic. The flushing
agent should be safe to use with both HCFC and HFC
refrigerants. Once a flushing agent has been selected, follow
the instructions provided with the product.
The first step should be purging the lines or air coil with
nitrogen. Purging with nitrogen first will remove some of
the particulate and residual oil which will allow the flushing
agent to work better. Never blow the flushing agent
through a compressor, filter drier, or txv as it will cause the
components to fail.
When flushing is complete and the final system is assembled,
an acid check should be preformed on the system. Acid test
kits are available from most HVACR distributors.
Connection to Air Coil
Typical Split System Application - Remote Blower Coil
and Typical Split System Heat Pump Coil Add-on Fossil
Fuel Furnace illustrations show typical 5 Series Split
installations. The Line Set Sizes table shows typical line
set diameters and maximum length. Line sets over 60 feet
are not recommended. If the line set is kinked or deformed
and cannot be reformed, the bad section of pipe should be
replaced. A restricted line set will affect unit performance.
As in all R-410A equipment, a reversible liquid line filter
drier is required to ensure all moisture is removed from the
system. This drier should be replaced whenever “breaking
into” the system for service. All line sets should be insulated
with a minimum of 1/2” closed cell insulation. All exterior
insulation should be painted with UV resistant paint or
covering to ensure long insulation life.
Air Handler Installation
Air handlers used with dual capacity units must be capable
of operating with a minimum of 2 blower speeds. Refer to
the manufacturer’s instructions for the blower coil unit for
details on installing the air handling portion of the system.
All blower coil units/air coils must be installed as specified
by the manufacturer’s installations instructions. However,
the following recommendations should be considered to
minimize noise and service problems.
Typical Split System Application -
Remote Blower Coil
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 grille 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.
Ensure that the line set size is appropriate to the capacity
of the unit (refer to Line Set Sizes table). Line sets should
be routed as directly as possible, avoiding unnecessary
bends or turns. All wall penetrations should be sealed
properly. Line set should not come into direct contact
with water pipes, floor joists, wall studs, duct work, floors,
walls and brick. Line set should not be suspended from
joists or studs with a rigid wire or strap which comes into
direct contact with the tubing. Wide hanger strips which
conform to the shape of the tubing are recommended.
Isolate hanger straps from line set insulation by using metal
sleeves bent to conform to the shape of insulation. Line
set insulation should be pliable, and should completely
surround the refrigerant line.
NOTE: Improper installation of equipment may result in
undesirable noise levels in the living areas.
General Installation Information cont.
Lineset
To Air Handler
Insulated
Suction Line
Return
Duct
Low
Voltage Wire
Disconnect
Remote Air Handler
(Maximum Recommended Distance is
60' Between Units)
Condensate Drain
(must be trapped)
Supply
Duct
Air
Handler