Product Details

The Reznor® Series 100, Model B
Reznor® Series 100, Model B gas-fired gravity-vented unit heaters are designed for 80% thermal efficiency and are designed for use with natural or propane gas, as specified, in sizes from 25,000 to 400,000 BTUH gas Input.

Model B unit heaters are designed for ceiling suspension with a centrifugal blower for air delivery. Sizes 25-100 are equipped with a direct drive blower motor with multi-speed taps capable of handling up to .50″ w.c. of external static pressure. Sizes 125-400 are standardly equipped with a blower using an adjustable belt drive and motor capable of handling external static pressure up to .25″ w.c. Optional motors and drives are available to increase the blower capability to handle up to .50″ w.c. of external static pressure.

A terminal strip connector facilitates field connection to a remote 24-volt thermostat for automatic operation. Each unit is provided with a fan control and all required limit safety controls, including an energy cutoff (ECO) device and a blocked vent switch.

These units are approved for installation in The United States and Canada by the Canadian Standards Association (CSA). Canadian units require the selection of a totally enclosed motor. (An open motor may be selected for a heater to be installed in Canada only when the heater will be equipped with a Reznor® field-installed blower cabinet.)

NOTE: When installing gravity vented appliances check local and state codes for requirements. Some states require the addition of spark
pilot Option AH2 or AH3.

The Energy Policy Act of 2005 mandated that beginning August of 2008, no Gravity Vented Unit
Heaters may be sold without an Intermittent Ignition Device (No Standing Pilot- Spark Ignition
Only) AND, (either an automatic shutoff vent damper or a power vent exhaust). Your state may
have already enacted this restriction in their local codes. Please take note of this when placing
orders for gravity vented units.

STANDARD FEATURES:
● Orifices for natural gas
● Aluminized steel heat exchanger
● Aluminized steel burner rack with stainless steel insert
● Spark ignited, intermittent safety pilot with electronic flame supervision
● Single-stage combination gas valve (field adjustable for high altitude operation)
● 115/1/60 supply voltage – Sizes 25-300
● 230/1/60 supply voltage – Size 400
● ODP motor with internal overload (U.S. installations)
● Totally enclosed blower motor (Canadian installations)
● Motor contactor – Sizes 300 and 400
● Direct drive blower with multi-speed taps – Sizes 25-100
● Adjustable belt drive blower – Sizes 125 – 400
● Fan and limit safety controls
● Blocked vent shutoff system
● Energy cutoff (ECO) device
● 24-volt control voltage transformer
● Horizontal/Vertical vent outlet
● Horizontal louvers or Duct adapter
● Terminal strip connector for 24-volt field wiring
● Convenient bottom burner access
● 4-point 3/8″-16 threaded hanger connections

OPTIONAL FEATURES – FACTORY INSTALLED:
● Equipped for propane gas
● E-3 (409) stainless steel heat exchanger and burner
● Two-stage gas control (50% low fire) – Sizes 75-400
● Spark ignited, intermittent safety pilot with electronic flame supervision with timed lockout (timed lockout is required for propane gas)
● Burner air shutters
● 208/230 single phase supply voltage – Sizes 125-400
● 208/230 three phase supply voltage – Sizes 125-400
● 460 three phase supply voltage – Sizes 125-400
● 575 three phase supply voltage – Sizes 125-400
● Alternate motor HP and drive – Sizes 125-400
● Totally enclosed blower motor – Sizes 125-400

NOTE: Regulated combination redundant gas valve consists of combination pilot solenoid valve, electric gas valve, pilot filter, pressure regulator, pilot shutoff, and manual shutoff, all in one body. Gas supply pressure must not exceed 0.5 psi (8 oz. or 14″ w.c.). Minimum inlet pressure for natural gas is 5″ w.c.; minimum inlet pressure for propane gas is 11″ w.c.

OPTIONAL FEATURES – FIELD INSTALLED:
● Power venter
● Vertical louvers
● Downturn air nozzle, 25-65°
or 50-90° variable air deflector range
● Thermostat and relay kits
● Air recirculation kits
● Manual summer/winter switch
● Filter cabinet with 1″ or 2″ filters
● Polytube adapter – Models 75-400
● Multiple heater control
● Hanger kits to suspend from 1″ pipe or to use with vibration isolation suspension
● Unit-mounted thermostat bracket
● Step down transformer 230/115 or 460/115 – Sizes 25-100
● Burner air shutters
● Low ambient fan control relay kit
● Belt guard and/or blower inlet guard
● Single-stage and two-stage thermostats
● Thermostat guard with locking cover
● Manual shutoff valve and union
● Gas conversion kit

NOTE: Not certified for residential use.