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Hi Delta Pool Heaters, 502C-902C

Hi Delta Pool Heaters, 502C-902C

The Hi Delta® line of fan-assisted combustion units offers solid performance with low emissions, flexible control, and easy-to-understand diagnostics.


  • 83.1% efficiency
  • Multiple vertical venting and sidewall venting options. No extractor required for sidewall applications up to 70ft on room air.
  • All models indoor/outdoor certified
  • Patented burner “security blanket” enhances staged combustion, minimizes installation/start-up issues, and protects burners from metal fatigue.
  • 105ºF minimum inlet water temperature
  • Cupro-nickel finned-tube heat exchanger with brass headers. AB 1953 compliant.
  • VERSA IC® control package with LCD display
  • Status display lights
  • Cascade control of up to 8 units, no external sequencer required.
  • Diagnostics center with history in English , not in codes
  • Modbus RTU BMS port (RS485)
  • 0-10 VDC BMS Interface (set point or direct drive)
  • Ducted combustion air capable. TruSeal® CSA-Certified direct-vent available.
  • Certified to the ANSI Z21.56 pool heater standard.

    Bypass Options:

    • The standard external bypass uses a thermostatically-controlled valve to adjust bypass flow and achieve cold-water protection.
    • The Cold Water Run (CWR) option provides electronic control of a variable-speed pump to continuously adjust bypass flow, achieving real-time cold-water protection.
        • 100% Factory fire-tested 
        • Thermal efficiency: 83.1% 
        • Versa IC® Controller with LCD display 
        • Maximum Set-point: 106°F (104°F Default) 
        • Maximum outlet temperature: 160°F (71°C) 
        • Minimum non-condensing inlet temperature: 105°F (40°C) 
        • Thermal-shock proof heat exchanger 
        • Limited 20-year thermal shock warranty 
        • Limited 5-year heat exchanger warranty 
        • Full safety diagnostics with fault history 
        • PolyTuf powder-coated cabinet 
        • No combustible floor shield required 
        • Fan-Assisted 
        • Patented burner security blanket 
        • SCAQMD Rule 1146.2 certified, Low NOx < 20 ppm 
        • Cascade Up To 8 Heaters – No External Sequencer Needed
      Technical specification
      • Unique ref.hi-delta-pool-heaters-502C-902C
      • Collection setPool & Spa Products
      • CollectionCommercial Pool Heaters
      • TypeObject (single object)
      • Date of publishing2020-10-01
      • Edition number1
      • BIMobject CategoryHVAC - Water heaters
      • IFC classificationHeat Exchanger
      • UNSPSC nameDomestic water heaters
      • UNSPSC code40101825
      • Uniclass 2015 CodePr_60_60_96
      • Uniclass 2015 DescriptionWater heaters
      • CSI MasterFormat 2014 Code23 00 00
      • CSI MasterFormat 2014 TitleHeating, Ventilating, and Air Conditioning (HVAC)
      • OmniClass TitleHVAC Specific Products and Equipment
      • OmniClass Number23-33 00 00
      • CSI UniFormat II CodeD3090
      • CSI UniFormat II TitleOther HVAC Systems & Equipment

      Region availability

      North America
      United States