Model # DFS 350, Low Temperature Rise Separated Combustion Indoor Gas Duct Furnaces
Item # DFS 350 — Model # DFS 350, Low Temperature Rise Separated Combustion Indoor Gas Duct Furnaces
Indoor Separated Combustion (DFS) The indoor separated combustion duct furnace was designed as a building's primary room heating source and is certified for, non residential, commercial applications only. Separated combustion duct furnaces are specifically designed for buildings with hostile atmospheric conditions such as high humidity, contaminated indoor air or rooms with negative pressure. Available in 11 power exhausted model sizes, the unit covers a wide variety of applications. Input ranges from 75,000 to 400,000 btu/hr for either natural or propane gas. Airflow direction can be specified for location downstream from the dehumidifier and has a drain pan that allows connection to a condensate drain line. There are many other options available including various types of gas valve controls to suit specific requirements.
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Indoor Separated Combustion (DFS) The indoor separated combustion duct furnace was designed as a building’s primary room heating source and is certified for, non residential, commercial applications only. Separated combustion duct furnaces are specifically designed for buildings with hostile atmospheric conditions such as high humidity, contaminated indoor air or rooms with negative pressure. Available in 11 power exhausted model sizes, the unit covers a wide variety of applications. Input ranges from 75,000 to 400,000 btu/hr for either natural or propane gas. Airflow direction can be specified for location downstream from the dehumidifier and has a drain pan that allows connection to a condensate drain line. There are many other options available including various types of gas valve controls to suit specific requirements.
Optional Features
- Adjustable differential air flow proving system
- Building management compatible gas controls for modulation control using a 0-10 VDC or 4-20 mA input
- Control relay - double pole, double throw
- Fan delay timer
- Gas control step down transformers for 208/230V/1Ph and 208/230/460/575V/3 Ph
- High and/or low gas pressure switches
- Manual reset high limit switch
- Mechanical modulation and electronic modulation controls for natural gas
- Multiple furnace electronic amplifier for controlling up to 4 duct furnaces with one discharge air sensor
- Right side access to burner and gas controls
- Single stage intermittent pilot with retry control system for operation on propane gas
- Supply air fire stat
- Timed freeze protection
- Two-stage, mechanical modulation, and electronic modulation controls for propane gas
Gas Connection Pipe Size
3/4 in
Approximate Unit Net Weight
329 lb
Approximate Unit Shipping Weight
454 lb
Footnotes
1 Dimensions are subject to change without notice
2 Nominal vent pipe size is 4" (Models 75-175) and 6" (Models 200-400). Exhaust pipe installed over collar. Combustion air pipe installed inside collar.
Footnotes
1 Dimensions are subject to change without notice
2 Nominal vent pipe size is 4" (Models 75-175) and 6" (Models 200-400). Exhaust pipe installed over collar. Combustion air pipe installed inside collar.
Footnotes
1 Dimensions are subject to change without notice
2 Nominal vent pipe size is 4" (Models 75-175) and 6" (Models 200-400). Exhaust pipe installed over collar. Combustion air pipe installed inside collar.
Footnotes
1 Dimensions are subject to change without notice
2 Nominal vent pipe size is 4" (Models 75-175) and 6" (Models 200-400). Exhaust pipe installed over collar. Combustion air pipe installed inside collar.
Btu/Hr Input
350,000
Btu/Hr Output
280,000
20°F Air Temperature Rise
12963 CFM
25°F Air Temperature Rise
10370 CFM
30°F Air Temperature Rise
8642 CFM
35°F Air Temperature Rise
7407 CFM
40°F Air Temperature Rise
6481 CFM
45°F Air Temperature Rise
5761 CFM
50°F Air Temperature Rise
5185 CFM
55°F Air Temperature Rise
4714 CFM
60°F Air Temperature Rise
4321 CFM
Air Temperature and External Static Pressure Limits
The maximum allowable discharge air temperature is 150ºF. The maximum allowable air temperature rise for Low Air Temperature Rise Outdoor Units is 60ºF. The maximum allowable air temperature rise f
Note
115/60/1 Supply Voltage
2.40 A
Total Unit Amp Draw
The total unit amp draw is a combination of the control step down transformer and the power exhauster motor. The control step down transformer includes damper actuators, ignition controllers, gas val
Dimensions - A
47.14 in
Dimensions - B
37.39 in
Dimensions - C
36.00 in
Dimensions - D
37.04 in
Dimensions - E
32.61 in
Dimensions - F
26.43 in
Dimensions - G
19.21 in
Dimensions - H (duct width)
38.53 in
Dimensions - J (duct height)
22.90 in
Dimensions - K2
5.86 in
Dimensions - L1
6.18 in
Dimensions - M
9.60 in
Footnotes
1 Dimensions are subject to change without notice
2 Nominal vent pipe size is 4" (Models 75-175) and 6" (Models 200-400). Exhaust pipe installed over collar. Combustion air pipe installed inside collar.
Product Specifications
Low Temperature Rise Separated Combustion Indoor Gas Duct Furnaces
Low Temperature Rise Separated Combustion Indoor Gas Duct Furnaces
Low Temperature Rise Separated Combustion Indoor Gas Duct Furnaces
Low Temperature Rise Separated Combustion Indoor Gas Duct Furnaces
Low Temperature Rise Separated Combustion Indoor Gas Duct Furnaces
Low Temperature Rise Separated Combustion Indoor Gas Duct Furnaces
Low Temperature Rise Separated Combustion Indoor Gas Duct Furnaces
Low Temperature Rise Separated Combustion Indoor Gas Duct Furnaces
Low Temperature Rise Separated Combustion Indoor Gas Duct Furnaces
Low Temperature Rise Separated Combustion Indoor Gas Duct Furnaces
Center Bonded Mounts STA Series
Dehumidifiers
Control Systems
Remote Condensers
Add-On Duct Heaters
We’ve only looked at three common problems here, but there are a host of other issues that can cause dehumidifier malfunctioning.
To read more about what can go wrong with dehumidifiers and learn how to fix problems quickly and efficiently, download our free dehumidifier troubleshooting guide today.
Download our Free Troubleshooting Guide