Standard Rack Assembly

– Fully sheeted duct furnaces mounted in a 16-gauge galvanized steel frame.
– Provides listed temperature rise and air side pressure drop performance.
– Each furnace includes an individual shutoff valve, flexible gas connector & union piped to properly sized supply header.
– Condensate drains pre-piped to a common header.
– Easy removal of any single duct furnace.
– All controls prewired to a sequencer for system control.
– Customer only needs to provide Power, “Call for Heat” and a 0-10 VDC signal.

Outdoor Venting Kit

– Vent riser assembly with integral rain cap.
– Provides proper venting of flue gases and prevents flue gas recirculation into burner combustion air supply.

Application Guidelines Product Specification User Guidelines OEM Instructions Submittal / Order Information

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Model NumberPDFAlt PDFPDF of Gas TrainPDF of Wiring DiagramMax Input MBHMax Output MBHMin Input MBHMin Output MBHNat. Gas Turndown RatioMax Ind. HX Input# of HX'sMax CFMMax APD @ Min RiseMax Temp RiseMin CFMMin APD @ Max RiseDim ADim BDim CDim DWeight (Lbs.)
HDA-VHX-250-500-OPDFPDFPDFPDF500400504010 to 12502185190.8310037040.0446.13047.417490
HDA-VHX-300-600-OPDFPDFPDFPDF600480604810 to 13002222220.9710044440.0551.63047.417533
HDA-VHX-350-700-OPDFPDFPDFPDF700560705610 to 13502259261.0910051850.0659.13047.417587
HDA-VHX-400-800-OPDFPDFPDFPDF800640806410 to 14002296301.210059260.0665.73047.417640
HDA-VHX-300-900-OPDFPDFPDFPDF900720604815 to 13003333330.9710066670.05783047.417785
HDA-VHX-500-1000-OPDFPDFPDFPDF10008001008010 to 15002370371.3810074070.0778.63047.420733
HDA-VHX-350-1050-OPDFPDFPDFPDF1050840705615 to 13503388891.0910077780.0687.83047.417856
HDA-VHX-600-1200-OPDFPDFPDFPDF12009601209610 to 16002444441.5210088890.0891.63047.420773
HDA-VHX-400-1200-OPDFPDFPDFPDF1200960806415 to 14003444441.210088890.0697.53047.417936
HDA-VHX-500-1500-OPDFPDFPDFPDF150012001008015 to 15003555561.38100111110.071173047.4201076
HDA-VHX-600-1800-OPDFPDFPDFPDF180014401209615 to 16003666671.52100133330.081313047.4201136
Note: For Propane gas, turndown is 60% of stated natural gas turndown.