CONVECTOR Submittal Specification
FWG-A Front Outlet Cabinet Recessed Convector
Model Series: FWG-A
Product Overview
The Vulcan FWG-A is a front outlet, recessed convector cabinet designed with a 4-sided overlap. It features stamped louvers and a pencil-proof design.
Key Specifications
Front and Liner
- Style: Front Outlet
- Outlet: Stamped Louvers, Pencil Proof
Element/Coil
Bronze Header 3/4" NPT with Copper Tube/Alum Fins (Mechanically Expanded).
Lengths
Available in 20" through 64" in 4" increments.
Materials
Cabinet Front and Liner:
- 18 Ga./20 Ga. CRS (Standard) [*]
- 18 Ga./18 Ga. CRS [Optional]
- 16 Ga./20 Ga. CRS [Optional] [*]
- 16 Ga./18 Ga. CRS [Optional]
- 16 Ga./16 Ga. CRS [Optional]
- 14 Ga./20 Ga. CRS [Optional] [*]
- 14 Ga./18 Ga. CRS [Optional]
- 14 Ga./16 Ga. CRS [Optional]
- 14 Ga./14 Ga. CRS [Optional]
- Liner is Galvannealed Steel [*]
Stainless Steel (SS) options are also available for various gauges [Optional].
Finishes
- Baked Powder Prime
- Baked Powder Color [Optional]
- Stainless Steel (SS) options available for 18 Ga./20 Ga., 18 Ga./18 Ga., 16 Ga./20 Ga., 16 Ga./18 Ga., 16 Ga./16 Ga. [Optional]
Optional Accessories
- Damper: Damper Blades Factory Installed, Knob Damper [Optional], Tamper Resistant [Optional].
- Access Doors: [Optional].
- Insulation: Back Only [Optional], Back, Sides, Top [Optional].
- Piping Knockout: [Optional].
- 4" End Pockets: LH [Optional], RH [Optional], Both Ends [Optional].
- Perforated Front: Consult Factory, 16 Ga. [Optional], 14 Ga. [Optional].
Header Connections
- Single Header Both Ends (Standard)
- Single Inlet 1 End / Dual Inlet 1 End [Optional]
- Dual Inlet Both Ends [Optional]
Model Dimensions and Ratings
Type FWG-A Model Table
The following table provides dimensional data (D, L, H, B, J) for various FWG-A models (e.g., 4xx-18, 6xx-20, 8xx-24) and their corresponding lengths.
| MODEL | D | L | H | B | J |
|---|---|---|---|---|---|
| 4xx-18 | 18 | 20,24,28, 32,36,40, | 20 | ||
| 4xx-20 | 20 | 44,48,52, | 24 | 2-1/8 | 4 |
| 4xx-24 | 4-13/16 | 56,60,64, | 26 | ||
| 4xx-26 | 32 | ||||
| 4xx-32 | |||||
| 6xx-18 | 18 | 20,24,28, 32,36,40, | 20 | ||
| 6xx-20 | 20 | 44,48,52, | 24 | 3-1/8 | 6 |
| 6xx-24 | 6-13/16 | 56,60,64, | 26 | ||
| 6xx-26 | 32 | ||||
| 6xx-32 | |||||
| 8xx-18 | 18 | 20,24,28, 32,36,40, | 20 | ||
| 8xx-20 | 20 | 44,48,52, | 24 | 4-1/8 | 8 |
| 8xx-24 | 8-13/16 | 56,60,64, | 26 | ||
| 8xx-26 | 32 | ||||
| 8xx-32 |
Note: When adding end pockets, liner and front length increase.
Steam Ratings Summary
The document provides detailed Steam Ratings in BTU/H for various convector depths, lengths, and front outlet widths (18", 20", 24", 26", 32") at specific conditions (215°F water temperature, 65°F entering air temperature). Due to the extensive nature of these tables, precise ratings and selection assistance are best obtained using the manufacturer's online specifier tool.
Performance Correction Factors
The following tables provide correction factors to adjust BTU performance based on varying operating conditions:
Table 3: Convector BTU Correction Factors
This table details correction factors based on Average Water Temperature (°F) and Entering Air Temperature (°F). These are used to adjust BTU performance from standard conditions.
Table 4: Correction Factors for Steam Pressures
Provides correction factors for steam pressures other than 1 PSI Gauge, up to 50 PSI Gauge. It notes a maximum recommended operating pressure of 150 PSIG.
Table 5: Correction Factors for Access Doors
Lists derating factors for units with access doors, categorized by door location (Free Standing, Non-Recessed vs. Semi-Recessed or Fully Recessed) and number of doors.
Table 6: Pressure Loss
Shows pressure loss in feet of water for different water flow rates (GPM) across 4-inch, 6-inch, and 8-inch convector models. This data is used for determining pressure head requirements.
Table 7: Gallons Per Minute of Hot Water Required
A graphical representation illustrating the relationship between Gallons Per Minute (GPM) and thousands of BTU per hour (MBH) for various water temperature drops (10°F, 20°F, 30°F, 40°F).
Table 8: Output-Flow Rate Corrections
Details MBH values based on specific water temperature drops (TD) and minimum water flow rates (GPM) required to maintain turbulent flow within element tubes.
Diagram Descriptions
Convector Coil Diagram
Illustrates the construction of the convector coil, showing details such as the number of tubes per element (2, 3, or 4 tubes), tube diameter, fin height (2-1/2"), fin spacing (6 fins per inch), and header type (e.g., 3/4" NPT typical, dual inlet header). It also indicates the relationship between end-to-end length and liner length, and riser center dimensions.
Note: When ordering convectors with end pockets, the overall physical length increases by 4" for each end pocket, while the coil length remains standard.
