Direct-Fired Heating System

DF-HEAT Direct-Fired Heating System - Model ZDF

IOMZDF-4 (877KB)	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.

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.