Dedicated Outdoor Air Split System

DOAS Split System - Model ZFR

Sierra Heat Exchanger Warranty (343KB) TGZFR-4 Tech Guide (2MB)	Dedicated Outside Air System Rooftop AHU with dehumidification, heating, and filtration Utilizes external DX or existing CWS cooling source Integral indirect-fired heating with DHTD (patent(s) pending) Includes Patented AdaptAire™ DDC controls, integrates with most building control systems	The ZFR delivers high quality outside ventilation air for comfort and Indoor Air Quality in commercial buildings, with dehumidification, heating and filtration (up to MERV15) in a split system configuration. The ZFR allows engineers to satisfy load requirements more efficiently with higher ventilation rates while permitting conventional HVAC equipment to operate as originally designed.

Sierra Heat Exchanger Warranty

(343KB)

TGZFR-4 Tech Guide

(2MB)

Dedicated Outside Air System
Rooftop AHU with dehumidification, heating, and filtration
Utilizes external DX or existing CWS cooling source
Integral indirect-fired heating with DHTD (patent(s) pending)
Includes Patented AdaptAire™ DDC controls, integrates with most building control systems

The ZFR delivers high quality outside ventilation air for comfort and Indoor Air Quality in commercial buildings, with dehumidification, heating and filtration (up to MERV15) in a split system configuration. The ZFR allows engineers to satisfy load requirements more efficiently with higher ventilation rates while permitting conventional HVAC equipment to operate as originally designed.

ZFR MODEL	CFM RANGE	OPTIONAL GAS HEAT MAX. MBH INPUT	BASIC UNIT FOOTPRINT LxWxH	AVAILABLE ARRANGEMENTS	APPROVALS	AVAILABLE ACCESSORIES
20	1,500-5,000	200	72"x76"x36"	Horizontal	ANSI, FM, IRI	Inlet Hood, Flat Bank Filter Section with High Efficiency Filters, Inlet Shut-Off Damper or Mixing Dampers, and Cooling Coil Section with CW, R-22, R-410A Cooling Coils
40	3,000-9,500	400	82"x80"x50"
60	4,500-14,000	600	96"x94"x60"

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.
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.