Brochure

Reznor
®
Series 100, Model B gas-red gravity-vented unit heaters are designed for 80% thermal efciency
and are designed for use with natural or propane gas, as specied, 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 eld 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 Asso-
ciation (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
®
eld-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.
● Orices for natural gas
● Aluminized steel heat exchanger
● Aluminized steel burner rack with stainless steel insert
● Spark ignited, intermittent safety pilot with electronic ame supervision
● Single-stage combination gas valve (eld 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 eld wiring
● Convenient bottom burner access
● 4-point 3/8"-16 threaded hanger connections
● Equipped for propane gas
● E-3 (409) stainless steel heat exchanger and burner
● Two-stage gas control (50% low re) - Sizes 75-400
● Spark ignited, intermittent safety pilot with electronic ame 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
DESCRIPTION
STANDARD FEATURES
OPTIONAL FEATURES -
FACTORY INSTALLED
WARNING: Gas-red appliances are not designed for use
in hazardous atmospheres containing ammable vapors or
combustibledust,oratmospherescontainingchlorinatedor
halogenatedhydrocarbons.
Installationsinpublicgaragesorairplanehangarsarepermit-
tedwheninaccordancewithANSIZ223.1andNFPA54Codes
orCAN1-B149Codesandenforcingauthorities.
NOTE: Regulated combination redundant gas valve consists of combination pilot solenoid valve, electric gas valve, pilot lter, 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.
ANSI Z83.8
CAN/CGA 2.6
MODEL B
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Gas-Fired,Gravity-Vented,
Blower-TypeUnitHeaterfor
Commercial/IndustrialUse
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restric-
tion in their local codes. Please
take note of this when placing
ordersforgravityventedunits.
Form RZ-C-UH (Version H) Page 20
Page Number _______ of ______