All Products >> Heavy Equipment for Heaters and Air Conditioners >>Reznor’s Model SSCBL Extended Capacity, Gas-Fired, Separated-Combustion, Indoor, Packaged Duct Furnace(S)/Blower Combination for Commercial/Industrial Use

Product Details

The Reznor’s Model SSCBL Extended Capacity, Gas-Fired, Separated-Combustion, Indoor, Packaged Duct Furnace(S)/Blower Combination for Commercial/Industrial Use
Reznor® Model SSCBL is a unified assembly of one, two, or three separated-combustion duct furnaces and a large-capacity Reznor blower cabinet. Sizes are available with heating capacities from 400,000 through 1,200,000 BTUH gas input. The standard packages are heating-only systems, but factory-installed gas and inlet-air control options are available to meet makeup air or combination heating/makeup air specifications. These systems are designed for indoor installation in areas with negative pressure and/or extremely dirty or mildly corrosive atmospheres.

Model SSCBL is available for use with either natural or propane gas, as specified. All units are equipped with required limit and safety controls.

Each of the duct furnaces in these packaged systems are designed to separate combustion air from the air in the heated space. The furnaces are engineered 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. Exclusive outside combustion air prevents dirt, lint, dust or other contaminants in the heated space from entering the combustion zone of the furnace. A specially designed combustion-air inlet/vent terminal assembly is required for each duct furnace in a Model SSCBL packaged system. Each furnace section must have a separate terminal assembly. The specially designed terminal assembly requires only one building penetration per furnace section.

Both the separated-combustion duct furnaces and the packaged system are design-certified by the Canadian Standards Association for installation in the U.S. and Canada

Standard Features:
● Orifices for natural gas
● Aluminized steel burners with stainless steel insert
● 208-volt power supply
● 24-volt control transformer
● Redundant single-stage combination gas valve on each furnace (see Note 1)
● Intermittent spark pilot
● Fan and limit safety controls
● Reverse air flow limit
● Fan and limit safety controls
● Pre-wired to terminal blocks
● Power venter
● Twin centrifugal blowers with adjustable belt drive
● Galvalume steel cabinet with interlocking joint construction
● Horizontal discharge air opening with duct flanges
● Curb cap base with hangers for suspension
● Blower cabinet (less optional insulation, filter rack and filters) with horizontal inlet-air opening
● Left side controls (facing air stream)
● 1/2” O.D. BX cable (Chicago code)

NOTE 1: Regulated combination redundant gas valve consists of combination pilot solenoid valve, electric gas valve, pilot filter, pressure regulator, pilot shut-off, 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.

NOTE 2: Not certified for residential use.

● Unit equipped for propane gas
● E-3 (409) stainless steel heat exchanger
● E-3 (409) stainless steel burners
● E-3 (409) stainless steel drip pan
● Intermittent spark safety pilot with timed lockout
● Individual single-stage gas control on each furnace section
● Two-stage gas control on each furnace section – effective 2 to 6 stage gas control (see Gas Control Option page for more detailed description)
● Electronic modulation 50%-100% turndown or 20%-100% turndown
● Variable frequency drive with open dripproof or totally enclosed motor
● VFD control options
◊ Soft start
◊ Two speed control
◊ DDC signal from remote device
● Makeup air controls/dampers
● 208/1, 230/1, 208/3, 230/3, 460/3, 575/3 supply voltages
● 1 HP through 20 HP open drip-proof or totally enclosed motors available (motors meet EISA specifications for efficiency)
● Burner air shutters (required for units equipped for propane gas)
● Firestat(s)
● Freezestat(s)
● Convenience outlet
● 1/2” O.D. BX cable (Chicago code)
● Motor starter (optional with motors having internal overload protection)
● Blower cabinet insulation
● Filter rack with 2” disposable, pleated or permanent filters
● Double wall cabinet construction
● FM, GAP manifold arrangements
● High ambient burner cutoff
● Gas pressure safety switches
● Air flow proving switch
● Right side controls (facing airstream)
● Cooling coil cabinet with DX or chilled water coil, requires special handling – see cooling coil cabinet section
● Extended heat exchanger(s) warranty; five (5) or ten (10) year

● Horizontal or vertical combustion-air inlet/vent terminal assembly (one per furnace section; installation requirement)
● Remote control center
● Disconnect switch – UL Listed
● Single-stage thermostat
● Two-stage thermostat
● Electronic 7-day programmable thermostat
● Cooling coil cabinet with DX or chilled water coil
● Evaporative cooling module (see Evaporative Cooling Catalog)