Sierra Fresh Air Systems
Stressing Environmental Responsibility and Sustainability

Gas Heat Pump - Models XGP096E1NHS, AXGP180E1NHS, AWGP180PHSD



  • Direct-fired design delivers 100% combustion efficiency for space heating
  • 2.5" of external static provides installation flexibility and handles long duct runs
  • Certified to ANSI Standards Z83.4 and Z83.18
  • Includes Patented AdaptAire™ DDC controls, integrates with most building control systems
The ZDF Direct Fired systems are flexible, cost-effective units for indoor or outdoor space heating, make-up air, and ventilation applications. Superior tube frame construction and stainless steel burners deliver decades of reliable service. The ZDF from Sierra can provide up to 16,000 CFM of warm, fresh and clean air to your building.

ZDF SERIES MODEL CFM RANGE MBH INPUT RANGE BASIC UNIT FOOTPRINT LxWxH AVAILABLE ARRANGEMENTS APPROVALS AVAILABLE ACCESSORIES
035 2,000-3,500 329-514 68"x42"x36" Horizontal or Vertical ANSI, FM, IRI Inlet Hood, V-Bank Filter Section, and Mixing Dampers with Return Air Flow Station
070 3,750-7,000 329-1,027 76"x52"x40"
110 7,250-11,000 329-1,615 82"x64"x48"
160 11,500-16,000 329-1,933 92"x64"x48"

Control System Application Includes:
MDT Modulating Discharge
Temperature Control
Discharge air sensor mounted in unit discharge with remote mounted 3 gang box cover including manual potentiometer to enable unit and adjust temperature setpoint, Fan On Light, Burner On Light, and Cool On Light. Additional potentiometer is provided if optional return air damper section for manual or mixed air control is ordered.
MRT Modulating Room
Temperature Control
Discharge air sensor mounted in unit discharge with remote mounted 3 gang box cover including manual potentiometer to enable unit and adjust temperature setpoint, Fan On Light, Burner On Light, and Cool On Light. Also includes RS-std room sensor (does not allow remote room setpoint adjustment). Additional potentiometer is provided if optional return air damper section for manual or mixed air control is ordered.
MRT-Pro Modulating Room Temperature Control with RS-Pro room sensor allowing after hours unit enable, room setpoint adjustment, and digital temperature readout. Discharge air sensor mounted in unit discharge with remote mounted RS-Pro room sensor with push buttons for room setpoint adjustment and digital temperature readout. On units with optional return air damper section a remote mounted 3 gang box cover is provided with potentiometer for manual or mixed air control.
MRT-Expert Modulating Room Temperature Control with BACview controller allowing after hours unit enable, room setpoint adjustment, operating feedback, monitoring of alarm status and digital temperature readout with RS-std room sensor. Discharge air sensor mounted in unit discharge with remote mounted BACview controller to set space temperature, operating schedules, and optional damper control setpoints. Service information, operating feedback and alarm status can also be monitored. Also includes a remote mounted RS-std room sensor.
VDT-Expert Modulating Discharge Temperature Control with BACview controller allowing after hours unit enable, operating feedback, and monitoring of alarm status. Discharge air sensor mounted in unit discharge with remote mounted BACview controller to set discharge temperature setpoint and operating schedules. Service information, operating feedback, and alarm status can also be monitored.

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