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OPTIONS AND ACCESSORIES
Factory-installed options
Coil options
include Tin-Plated* indoor hairpins, copper/copper
and vinyl-coated construction for refrigerant coils. Units are
shipped standard with copper tube/aluminum fin construction.
See model number nomenclature for coil options.
*Tin-Plated indoor coils are built with special hairpins that are de-
signed to resist both general pitting corrosion and excessive in-
door corrosion (Formicary Corrosion).
Field-installed accessories
Economizer with solid-state controls and barometric relief
dampers includes filter racks and provide outdoor air during
cooling and reduce compressor operation.
Manual outside air damper includes hood and filter rack with
adjustable damper blade for up to 25% outdoor air.
Flat roof curbs in both 8 in. and 14 in. sizes are available for
roof mounted applications.
Square-to-round duct transition kit enables 024-048 size
units to be fitted to 14 in. round ductwork.
Compressor hard start kit assists compressor start-up by pro-
viding additional starting torque on single phase units and pro-
longs compressor motor life.
Thermostats provide control for the system heating and cooling
functions. Thermostat models are available in both programma-
ble and non-programmable versions.
Crankcase heater provides anti-floodback protection for low-
load cooling applications.
LP (liquid propane) conversion kit allows for conversion from
natural gas to liquid propane fuel.
Low-ambient kit (Motormaster® II control) allows the use of
mechanical cooling down to outdoor temperatures as low as 0°F.
Solid-state Time Guard® II device provides short-cycling pro-
tection for the compressor. Not required with corporate electron-
ic thermostats.
Filter rack features easy installation, serviceability, and high-
filtering performance for vertical applications.
High altitude kit is for use at 2001 to 6000 ft above sea level.
Kit consists of natural gas orifices that compensate for gas heat
operation at high altitude.
LP to natural gas conversion kit allows conversion back to
natural gas.
Lifting kit includes rigging brackets which are inserted into the
unit base rigging holds to rig unit for rooftop applications.
Economizer with Solid-State Controls and Barometric Relief Dampers
Manual Air Damper (25% open)
Filter Rack
Roof Curbs (8-in. and 14-in.)
Square-to-Round Duct Transition Kit
Thermostats
Crankcase Heater
Compressor Hard Start Kit (for use on single-phase units only)
LP Conversion Kit
High Altitude Kit
Low Ambient Kit (Motormaster® II Control)
Solid-State Time Guard® II Device
Lifting Kit
LP to Natural Conversion Kit