Brochure
The Model OH Series oil-red unit heaters is available in inputs of 118,000, 173,000, and 229,000 BTUH with
82% efciency output. These completely packaged unit heaters burn No. 2 fuel oil.
Model OH heaters are equipped with a propeller fan. The fan is enclosed in an OSHA-type full safety fan
guard.
All units feature a low-stress, 18 gauge steel exchanger and a heavy, 13 gauge combustion chamber with
large, easily accessible, service panels. The oil burner assembly has a pressure-atomizing gun type burner that
provides excellent ame retention and an integral fuel pump. The burner has an electric spark ignition system
with an electronic cad-cell ame safety system with manual reset. All models have a ame observation port.
Standard features include fan and limit controls. The fan control prevents circulation of cold air at start-up and
provides heat dissipation while the unit is hot after the burner shuts off. The safety limit control provides unit
protection from high temperature caused by an airow restriction or motor failure. All units are wired for 115 volt,
60 Hz power supply and can be controlled with a 24V thermostat.
Model OH oil-red unit heaters are UL Listed for the United States, and are approved for installation in Canada
by the Canadian Standards Association (CSA).
NOTE: Not certied for residential use.
● Full automatic, thermostatically controlled operation
● Low stress, 18 gauge steel heat exchanger
● Heavy, 13 gauge steel combustion chamber
● 115/1/60 supply voltage
● 24-volt control voltage
● Atomizing power burner with single-stage fuel pump
● Electric spark ignition with cad-cell ame safety system
● Fan and limit safety controls
● Toggle disconnect switch
● Propeller fan
● Full safety fan guard
● Totally enclosed, permanently lubricated PSC motor with internal overload protection
● Built-in burner service tray
● Large easily accessible service panels for combustion chamber and heat exchanger maintenance
● Observation port
● Individually adjustable horizontal louvers
● 4-point suspension (1/2" threaded connectors)
● Vertical louvers
● Atomizing burner with two-stage fuel pump
● 30 GPH booster pump assembly with motor and two-stage fuel pump
● 70 GPH booster pump assembly with motor and two-stage fuel pump
● Booster pump pressure switch - used for intermittent pump operation in pressurized system
● Oil safety valve - recommended for all systems -- prevents siphoning and over pressure
● Draft Regulator - optional on UL listed Model
● Draft inducer relay
● Hanger kit to suspend from 1" pipe
● Outside combustion air adapter (not available with CSA models)
● Thermostat, single stage, 24-volt (40-90°F)
● Thermostat guard with locking cover
● Draft regulator - required on CSA Units
DESCRIPTION
STANDARD FEATURES
OPTIONAL FEATURES -
FIELD INSTALLED
A UL Listed (or equivalent) oil supply tank must be used with Reznor
®
oil-red heaters.
Model OT-250 fuel tank is available from Reznor.
● UL Listed
● 250 gallon capacity
● Bench top
For additional information, refer to Options and Accessories Section.
MODEL OH
®
Oil-Fired,Fan-Type,UnitHeater
Form RZ-C-UH (Version H) Page 23
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