Product Information


         Quality & Comfort


Fraser-Johnston® Heating & Air Conditioning home comfort systems are designed and built to provide maximum quality, comfort, and efficiency to your home. Whether you're looking for a furnace, an air conditioner or a complete heating and cooling solution , your Fraser-Johnston® Dealer can evaluate factors such as your home's size, age, number of rooms, regional climate, and utility costs to select the best system for your home.



Get Certified



Fraser-Johnston® encourages professionalism through North American Technician Excellence, Inc.(NATE). NATE is the leading certification program for technicians in the heating, ventilation, air-conditioning and refrigeration (HVAC/R) industry, and is the only test supported by the entire industry.

Energy Star

Earning the ENERGY STAR® means products meet strict energy efficiency guidelines set by the U.S. Environmental Protection Agency and the Department of Energy. When compared to standard models, ENERGY STAR® products are between 15 and 25% more efficient. This model meets ENERGY STAR® requirements for energy efficiency.

ISO 9001 Certified Company


Selected Product Details and Documentation


Fraser-Johnston Heating and Air Conditioning


Product Details
MODELZS 03-05 and A6 ReliaCore 100
PRODUCTZS -03 to -A6 R-410A Packaged Unit
EFFICIENCY<P><STRONG><U>3-5 Ton Units<BR></U></STRONG>10.8-11.0 EER<BR>13.0 SEER</P> <P><STRONG><U>6 Ton Units<BR></U></STRONG>11.0-11.2 EER<BR>11.3 IEER</P>
Compressor5 years
Heat Exchanger10 years
Parts1 year
 The convertible 3 to 6 ton commercial R-410a rooftop line combines a high-efficiency and advanced-economizer controls with unprecedented installation flexibility and low-installed costs. A single footprint size serves all units from 3 to 6 tons. Offered with Natural Gas heat.This new ZS 03-A6 line also has our Simplicity control board standard on every unit and Smart Equipment standard on every unit with a factory installed economizer.
  • HCFC-410a Refrigerant
  • SimplicityLite or Smart Equipment Control Board
  • Installation time and costs are reduced by easy power and control wiring.
  • All units are factory-wired, piped, charged, and tested prior to shipment.
  • Factory-installed options such as stainless steel heat exchanger, electric heating elements, single enthalpy economizer, high static drive blower motor, coil guard, dirty filter switch, hinged filter door, and tooless access panels further reduce installation costs.
  • BAS factory mounted controls include Simplicity Intelli-Comfort, Novar, Honeywell, Johnson, and CPC. 
  • Factory mounted supply and return air smoke detectors.
  • Gas and electric utility knockouts are provided on unit side and bottom for easy connections.
  • Convertible airflow design means no panel cutting is required, and no accessory panel is necessary.
  • Wide range of indoor airflows using belt-drive blowers.
  • Durable finish, made of powder-painted, galvanized steel to meet 1000-hour salt-spray test demands.
  • Full-perimeter base rails are permanently attached to provide a solid unit foundation and fork lift access.
  • Compressor is internally protected against high pressure and temperature.
  • Grooved copper tubes and enhanced aluminum- fin construction improve heat transfer.
  • Heat exchangers are corrosion-resistant, with aluminized steel tubular construction for durability and long service life.
  • Permanently lubricated condenser and evaporator fan motor bearings need no annual maintenance.
  • Complete line of field-installed accessories, propane and high-altitude conversion kits, motorized dampers, single enthalpy economizers, and dual enthalpy sensors are available.
  • Durable, light weight all aluminum Microchannel condenser coil.

    Consumer Brochure - Fraser-Johnston Epoxy Polymer E-Coat Coil Coatings (High Quality Print Version)PUBL-7096-B-0814A.PDF3336
    Consumer Brochure - ReliaCoreā„¢ 100 Series 3 to 6 Ton Single Package RooftopsPUBL-8316-A-0616.PDF3753
    Consumer Brochure - Fraser-Johnston Epoxy Polymer E-Coat Coil CoatingsPUBL-7096-B-0814.PDF1003
    Submittal Data Sheet - 2MD04700324 Motorized Outdoor Air Damper Accessory (0% to 100% Capability)530.18-SD1.12F-0698.pdf59
    Submittal Data Sheet - 1BD0401 Burglar Bars036-22462-001-A-0602.pdf55
    Submittal Data Sheet - 1RD0410 Barometric Relief Damper 0% - 100% Capacity530.18-SD25F-0996.pdf29
    Submittal Data Sheet - 1FE0405, 1FE0406, 1FE0407 & 1FE0408 Flue Exhaust Kit530.18-SD46F-1196.pdf30
    Submittal Data Sheet - 1RC0442 Roof Curb for 3 to 6 Ton Single Package Rooftop Models w/ & w/o Bottom Condensate Drain341456-FSD-A-0507.pdf145
    Submittal Data Sheet - ZD-03 Thru -05 (14 SEER) & ZS-03 Thru -A6 (13 SEER) R-410A Single Package Rooftop Units542619-FSD-E-1214.PDF190
    Wiring Diagrams - ZD/ZS/ZK/XT/XA Series -03 thru -A6 R-410A Single Package Rooftop Units (13 & 14 SEER) (Gen. 4)5140419-BTS-A-0615.PDF14912
    Technical Guide - ZD/ZS/ZK/XT/XA Series -03 thru -A6 R-410A Single Package Rooftop Units (13 & 14 SEER) (Gen. 1)5190087-BTG-C-0717.PDF3529
    CAD Drawing - ZS, ZF 3-6 ton and ZR, ZK 3-5 ton R-410AMBH0224A.dwg 
    CAD Drawing - DWG -ZS, ZF 3-6 ton and ZR, ZK 3-5 ton 410AAAK0020A.dwg 
    CAD Drawing DXF - ZS, ZF 3-6 ton and ZR, ZK 3-5 ton R-410AMBH0224A.dxf 
    CAD Drawing DXF - DWG -ZS, ZF 3-6 ton and ZR, ZK 3-5 ton R-410AAAK0020A.dxf 
    Unitary Commerical Product Talking Points70010
    (FJ)Florida Building Code (2014) Wind Cert.72020
    FJ 13 SEER RTU Phaseout: Last Call72230
    FJ: New Econ for ReliaCore 100 Lite Models72710
    FJ: How to Access Obsolete Models in UST72920
    Fraser-Johnston Commercial Guide Specs73650