All Products >> Heavy Equipment for Heaters and Air Conditioners >>Reznor’s Model ADF/ADFH 300 and 500 Series Indoor/Outdoor Direct-Fired Gas Heating/Makeup Air System for Industrial & Commercial Applications

Product Details

The Reznor’s Model ADF/ADFH 300 and 500 Series Indoor/Outdoor Direct-Fired Gas Heating/Makeup Air System for Industrial & Commercial Applications
The Reznor ADF/ADFH Series units are direct-fired heating/makeup air systems designed for either indoor or outdoor installation. Model ADF/ADFH 300 and Model ADF/ADFH 500 systems are available to operate on either natural or propane gas. Maximum heating capacity is 750,000 BTUH. Maximum air handling capacity is 7300 CFM. The ADF Models provide discharge air at a maximum temperature of 120°F; ADFH Models are designed for applications requiring discharge air at a maximum temperature of 160°F.

Standard electrical controls include a unit-mounted electronic circuit board with diagnostic lights, a motor contactor, and an intermittent hot surface ignition system. Standard gas controls include a single-stage valve controlled by a unit-mounted discharge air controller, main and pilot pressure regulators, a pilot solenoid valve, and main and pilot manual shutoff valves. Safety controls include a flame supervisor with 100% lockout, a low air flow proving switch, a pre-purge time delay, an energy cutoff device, and both automatic and manual temperature limit controls.

The weatherized, insulated cabinet is mounted on a full curb cap base. The base is designed for mounting on a roof curb or on rails.

Model ADF/ADFH units are approved for use in the United States to the latest editions of ANSI Standard Z83.4; and Canada to CAN 3.7 for non-recirculating gas-fired industrial air heaters.

STANDARD FEATURES:
● Weatherized, insulated, single-wall cabinet
● Horizontal configuration on a full curb cap base
● Horizontal inlet for 100% outside air
● Horizontal discharge – ADF Models
● Vertical (down) discharge – ADFH Models
● Cast iron direct-fired burner with stainless steel mixing plates
● Observation port for viewing pilot
● Natural gas fuel
● Manifold arrangement to 400 MBH
● 115/1/60 supply voltage
● 1/2 HP Open dripproof motor with contactor
● Adjustable belt drive
● Single-stage gas valve with air controller
● Main and pilot gas pressure regulators
● Pilot solenoid valve
● Manual gas shutoff valves
● Unit-mounted electronic circuit board with diagnostic lights
● Flame sensor with 100% lockout
● Hot surface intermittent ignition system with pre-purge time delay (U.S. Patent No. 5,556,272)
● 24 volt transformer (fused secondary)
● Automatic and manual limit controls
● Low & high air proving switch
● Burner and blower service switches
● Emergency cutoff limit control

* When two-speed motor is used on high speed, the burner is locked out.

WARNING: GAS-FIRED APPLIANCES ARE NOT DESIGNED FOR USE IN HAZARDOUS
ATMOSPHERES CONTAINING FLAMMABLE VAPORS OR COMBUSTIBLE DUST, OR ATMOSPHERES CONTAINING CHLORINATED OR HALOGENATED HYDROCARBONS. INSTALLATIONS IN PUBLIC GARAGES OR AIR PLANE HANGARS ARE PERMITTED WHEN
IN ACCORDANCE WITH ANSI Z223.1 AND NFPA 54 CODES OR CAN1 – B149 CODES
AND ENFORCING AUTHORITIES.
NOTES: (1) Model ADF/ADFH systems are not approved for residential use. (2) To retain certification, outdoor installations must include an optional screened inlet air hood or an optional evaporative cooling module.

OPTIONAL FEATURES – FACTORY INSTALLED:
● Vertical (down) discharge – ADF Models
● 208/1, 230/1, 208/3, 230/3, 460/3, or 575/3 supply voltage
● 3/4-10 HP Open dripproof motors; 1/2-10 HP Totally enclosed motors, 1-10 HP Premium efficiency motors, or 1-10 HP Two-speed motors for heating/cooling* (see RPM/BHP Tables)
● Two-stage gas valve with unit-mounted ductstat, seven types of electronic modulation gas controls
● Manifold arrangements that are certified to ANSI, CSA, FM and GAP1 requirements
● Double-wall construction
● Evaporative cooling module (see Evaporative Cooling Catalog)
● Discharge dampers
● Freezestat
● Firestat
● High ambient burner cutout control
● Interlocking relays
● Gas pressure switches
● Starters for auxiliary motors

OPTIONAL FEATURES – FIELD INSTALLED:
● Roof curb
● Outside screened air inlet hood
● Outside screened air inlet hood with integral 1” or 2” disposable, disposable pleated, or permanent aluminum filters
● Indoor filter cabinet with 1” or 2” disposable, disposable pleated, or permanent aluminum filters
● Gas inlet pressure regulator (for applications where gas supply pressure exceeds 14” or 1/2 psig; regulator must be mounted external to the cabinet)
● Control console
● Disconnect switch
● Door switch (for door heater application requirements; order Option BX1)