GT-PX (50YD) Packaged Series TWO-STAGE HORIZONTAL, VERTIC AL, AND DOWNFLOW PURON ® SYSTEMS SIZES 026 - 072 [7.0 - 19.3 kW] Revised Aug. 1 2010

GT-PX (50YD) Series Table of Contents What’s New with Bryant Geothermal’s GT-PX?...............51

Dimensions — Horizontal GT-PX ...........................................76

GT-PX Design Features....................................................................52

Electrical Data........................................................................................78

Unit Model Key.....................................................................................54

Standard Electrical Wiring Diagrams........................................79

About AHRI/ISO/ASHRAE 13256-1........................................55

GT-PX ECM Control Features.....................................................81

AHRI/ISO/ASHRAE/ANSI 13256-1 Performance............56

GT-PX ECM Control Features.....................................................82

Reference Calculations & Legend..............................................57

Blower Performance Data..............................................................83

Full Load Correction Factors........................................................58

Auxiliary Electric Heat......................................................................84

Part Load Correction Factors......................................................59

Auxiliary Heat Ratings......................................................................84

Performance Data...............................................................................60

Auxiliary Heat Electrical Data......................................................84

Performance Data Selection Notes..........................................70

Engineering Guide Specifications................................................85

Physical Data..........................................................................................71

Accessories, Options, and Warranty.........................................86

Dimensions — Vertical Upflow GT-PX ................................72

Revision History...................................................................................88

Dimensions — Vertical Downflow GT-PX .........................74

GT-PX 50

Br yant: Whatever It Takes.

Br yant Geothermal Heat Pump Systems What's New with Bryant Geothermal's GT-PX? Puron® Refrigerant Puron® is a non-chlorine based (HFC-410A) refrigerant, that with R-407C and R-134A, is seen as the future of all refrigerants used worldwide. HFC-410A characteristics compared to R-22 are: • Binary and near azeotropic mixture of 50% R-32 and 50% R-125. • Higher efficiencies (50-60% higher operating pressures) • Zero ozone depletion potential and low global warming potential. • Virtually no glide. Unlike other alternative refrigerants, the two components in HFC-410A have virtually the same leak rates. Therefore, refrigerant can be added if necessary without recovering the charge. MERV 11 2” Pleated filter All GT-PX units include a factory installed 2” filter rack/duct collar with a 2” pleated high efficiency MERV 11 air filter. The MERV (minimum efficiency reporting value per ASHRAE Standard 52.2) design features ultra low velocity (