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Gas Duct Furnaces

THE FOLLOWING EEDU MODELS OF GAS DUCT FURNACES HAVE BEEN FACTORY MATCHED TO THE DCA SERIES OF DEHUMIDIFIERS

ENERGY EFFICIENT

DESCRIPTION
Reznor Venturion EEDU Series Indoor Duct Furnaces were developed to provide an annual fuel use improvement of up to 25% when compared with gravity-vented duct furnaces. The use of a factory-installed power venter, with metered combustion air, limits burner flue losses while reducing the required vent pipe size. A sealed vent product collection chamber, in lieu of a draft diverter, reduces the loss of dilution air from the room in both the on and off cycles.

The EEDU duct furnaces are available for use with either natural or propane gas, as specified, in sizes from 75,000 through 400,000 BTUH gas input. These units are designed for use as heating components in heating, heating/cooling, or makeup air systems and require a separate blower system for air delivery. The furnace has a Reznor Thermocore® aluminized steel heat exchanger with venturi-design tubes. The die-formed burners are of aluminized steel and include flared ports with a stainless steel insert.

The EEDU model is approved for a temperature rise range of 50° to 90°F and includes "finger-baffles" for proper air distribution at these lower air volumes. The HEEDU model is approved for a range of 20° to 70°F.

Included as standard on the EEDU Series are an intermittent spark pilot and a single stage, 24-volt gas valve. Model EEDU Series units are designed for field connection to a 24-volt thermostat for automatic operation. All required limit and safety controls are provided, including a combustion air pressure switch, which verifies proper vent flow prior to allowing operation of the gas valve. These units are design-certified by the American Gas Association (A.G.A.) and approved by the Canadian Gas Association (C.G.A.) and display the appropriate label.

STANDARD FEATURES
• Orifices for natural gas
• Aluminized steel heat exchanger
• Aluminized steel burners with stainless steel insert
• 120-volt supply voltage
• Factory-installed power venter
• 120-volt limit control
• 24-volt control voltage transformer
• Combustion air pressure switch
• Redundant single-stage combination gas valve (see Note 1)
• Spark-ignited intermittent safety pilot with electronic flame supervision (see page 19)
• Burner rack access (pull-out drawer)
• Hanger/support angle
• Baked enamel finish
• Vertical vent cap (Canada only)

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 (409) stainless steel burners (see Note 2)
• E-3 (409) stainless steel drip pan (see Note 2)
• Spark-ignited intermittent safety pilot with electronic flame supervision and timed lockout (see page 19)
• Two-stage gas controls (see page 19; Not available on size 75 for propane gas)
• Electronic modulated gas controls (see page 19; Not available for use with propane gas)
• Burner air shutters (required for propane gas)
• 208/230-volt, 1-phase voltage alternate
• Heat exchanger side panels

OPTIONAL FEATURES - FIELD INSTALLED
• Transformer for 277/460V voltage alternate (used with standard 120V unit)
• Multiple coupling kit (one - 5 furnaces)
• Condensate drain flange kit
• Vent terminal cap (A.G.A. Models)
• 1" pipe hanger kit (includes four free-turning female threaded sockets)
• Manual shutoff valve and union (packed inside unit)
• Adjustable fan control (bimetal helix type)
• Room override for electronic modulation with ductstat
• Single-stage thermostat (40°F to 90°F)
• Two-stage thermostat (40°F to 90°F)
• Thermostat guard with locking cover

1. 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.-14" W.C.). Minimum inlet pressure for natural gas is 5" W.C. Minimum inlet pressure for propane gas is 11" W.C.
2. For air inlet temperatures below 40°F or temperature rise less than 40°F, an optional stainless steel heat exchanger is recommended. (see page 22.)
3. See page 20 for temperature rise and pressure drop tables.
4. Blower must be placed on entering air side of furnace.
5. Approved for installation downstream of an air conditioning coil (optional drain flange, stainless steel heat exchanger, and stainless steel burners are recommended).
6. Not approved for residential use.

INDOOR, POWER VENTED GAS FIRED DUCT FURNACES

TECHNICAL DATA - (NOTE: All sizes of heaters available for the 1997 heating season with 80% thermal efficiency.)

H   A.G.A. ratings for altitudes to 2000 feet. Above 2000 feet de-rate by orifice change. 4% for each 1000 feet above sea level. C.G.A. ratings for altitudes to 2000 feet. For high altitude units (2001-4500 ft.) de-rate by 10% of maximum input.
HH   Sizes shown are for natural gas connections. NOT supply line size. Propane gas connection is 1/2" for all sizes.
HHH   Prefix "H" indicates high CFM units without finger baffles.
HHHH   Refer to page 15 for power venting arrangements and wall or roof penetration details.

EEDU DIMENSIONS (Accurate to within plus or minus 1/8")

CLEARANCE FROM COMBUSTIBLES
1. Top, flue connections, sides, front - 6"
2. Bottom - 12"
3. Back - service access requires 29"