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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 structures
nor transmit noise to the interior of the structure.
Refrigerant and electrical line should be routed
through suitably waterproofed openings to pre-
vent 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 indoor
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 minimizes 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. Tubing should
be kept clean of foreign debris during installation
and installation of a liquid line filter drier is rec-
ommended if cleanliness or adequacy of system
evacuation is unknown or compromised. Every
effort should be made by the installer to ensure
that the field installed refrigerant 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 longevity. The maximum
recommended interconnecting refrigerant line
length is 75 feet, and the vertical elevation dif-
4
ference 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 in the liquid line of the system. If the
installation replaces a system with a filter dryer
already present in the liquid line, the filter dryer
must be replaced with the one supplied with the
unit. The filter dryer must be installed in strict
accordance with the manufacturer's installation
instructions.
For all other series models, installing a filter
dryer is optional. However, it is good installation
practice to install a filter dryer when replacing
the evaporator and/or condenser of a system.
When installing, the filter dryer must be installed
in strict accordance with the manufacturer's
installation instructions.
Optional Equipment — Optional equipment
(e.g.: liquid line solenoid valves, etc.) should be
installed in strict accordance with the manufac-
turer's installation instructions.
7. MAKING ELECTRICAL
CONNECTIONS
WARNING:
Turn off all electrical power at the main
circuit box before wiring electrical
power to the outdoor unit. Failure to
comply may cause severe personnel
injury or death.
Wiring Diagram/Schematic — A wiring dia-
gram/schematic is located on the inside cover
of the electrical box of the outdoor unit. The
installer should become familiar with the wiring
diagram/schematic before making any electrical
connections to the outdoor unit.
Outdoor Unit Connections — The outdoor
unit requires both power and control circuit
electrical connections. Refer to the unit wiring
diagram/schematic for identification and location
of outdoor unit field wiring interfaces.
Control Circuit Wiring — The outdoor unit is
designed to operate from a 24 VAC Class ll control
circuit. Control circuit wiring must comply with
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