NOTE: Weights listed are net weights for base unit only, options can change unit weights significantly. For option weights, please consult the printed catalog or your Reznor Representative.
Reznor® model SC series separated combustion gas-fired duct furnaces are designed to separate their combustion air from the air in the heated space.
Reznor® was the leading pioneer in perfecting separated combustion technology. These units are designed and manufactured in accordance with the ANSI definition of "separate combustion". While discharging exhaust air, the power venter draws in combustion air from the outside atmosphere. Using outside combustion air prevents dirt, lint, dust or other contaminants in the heated space from entering the combustion zone of the furnace. The separated combustion furnace is designed for use in building areas with negative pressure and/or extremely dirty or mildly corrosive atmospheres. A specially designed combustion air inlet/vent terminal assembly supplied with SC series units requires only a single-building penetration for both exhaust and combustion air.
Reznor® model SC series 6 duct furnaces are available in sizes from 100,000 through 400,000 BTUH gas input for use with either natural or propane gas, as specified. These units are designed for duct connection and require a separate air moving device upstream from the furnace. Model SC series 6 furnaces are 80% thermal efficient. Standard features include a spark-ignited intermittent safety pilot and a single-stage, 24-volt gas valve. Each unit is equipped with all required limit and safety controls, including a combustion air pressure differential switch to verify proper vent flow before allowing the gas valve to function. Operation of the heater is controlled through field connection to a remote 24-volt thermostat.
Reznor®’s model SC series separated combustion duct furnaces are available in two temperature rise ranges. The SC models are approved for a temperature rise range of 30°F to 90°F and include "finger baffles" for proper air distribution at these lower air volumes. Model SC furnaces are approved for installation downstream of an air conditioning coil. (When used in this application, installing an optional condensate drain on the furnace is strongly recommended. Also recommended is the selection of optional stainless steel burners and heat exchanger.)
Notes:
Regulated combination redundant gas valve consists of combination pilot solenoid valve, electric gas valve, pilot filter, pressure regulator, pilot shutoff and manual shut-off all in one body. Gas supply pressure must not exceed 0.5 PSI (8 oz. - 14" W.C.). Minimum inlet pressure for natural gas is 5" W.C. Minimum inlet pressure for propane gas is 11" W.C.
For air inlet temperatures below 40°F or temperature rise less than 40°F, an optional stainless steel heat exchanger is recommended.
For temperature rise and pressure drop, see tables.
Blower must be placed on entering side of furnace.
Approved for installation downstream of an air conditioning coil (optional drain flange, stainless steel heat exchanger and stainless steel burners are recommended).
Not approved for residential use.
Orifices for natural gas
Aluminized steel heat exchanger
Aluminized burners with a stainless steel insert
115 volt supply voltage
115 volt venter motor with stainless steel shaft
24 volt control voltage transformer
Redundant single-stage combination gas valve
Spark-ignited intermittent safety pilot with electronic flame supervision
High limit safety cutout
Post-purge control sequence
Terminal block wiring
Side access for burners and controls (slide-out burner drawer)
Threaded suspension couplings (2) for 1'’ pipe hangers
Optional Features - Factory Installed
Unit equipped for propane gas
E-3 (409) stainless steel heat exchanger (see note 2)
321 stainless steel heat exchanger (see note 2)
E-3 stainless steel bottom drip pan
E-3 (409) stainless steel burner (see note 2)
Spark-ignited intermittent safety pilot with electronic flame supervision and timed lockout
Two-stage gas controls
Electronic modulation - 50%-100% firing rate
Electronic modulation gas control, 20/28%-100% firing rate - not available on size 350
Burner air shutters (required for units equipped for propane gas)
208/230/460/volt/60/1 supply voltage
Adjustable fan control
Manifold approved to meet Illinois school code
High and low gas pressure switches
Right side controls (facing air stream)
Optional Features - Field Installed
Condensate drain flange kit
Manual shut-off valve and union
Room override for electronic modulation with ductstat
Horizontal or vertical vent terminal/combustion air assembly - installation required
Instructions for Installing Replacement Gear Motor Kit
Applies to Modulating Gas Control Options AG39, AG40, AG41 and AG42 on Reznor® Model Series SC and Model Series RP
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