CONVECTOR

Product Line: RF-A / RFG-A

Type: Flat Top Cabinet, Recessed, 3 Sided Overlap

Specifications

General

Front and Liner Style:

Front Outlet

Outlet:

Stamped Louvers, Pencil Proof

Element/Coil:

Bronze Header 3/4" NPT w/Copper Tube/Alum Fins (Mechanically Expanded)

Lengths:

20" thru 64" in 4" Increments

Material Options

Cabinet Front and Liner Material:

Standard: 18 Ga. CRS

Optional Materials (Gauges):

• 18 Ga. CRS (Opt'l)
• 16 Ga. CRS (Opt'l)
• 14 Ga. CRS (Opt'l)
• 18 Ga. SS (Opt'l)
• 16 Ga. SS (Opt'l)
• 14 Ga. SS (Opt'l)

Note: Liner is Galvannealed Steel for CRS options.

Finish Options

• Baked Powder Prime (Std)
• Baked Powder Color (Opt'l)

Header Connections

• Single Header Both Ends (Std)
• Single Inlet 1 End / Dual Inlet 1 End (Opt'l)
• Dual Inlet Both Ends (Opt'l)

Optional Accessories

• Damper: Damper Blades Factory Installed, Knob Damper (Opt'l), Tamper Resistant (Opt'l)
• Access Doors: (Opt'l)
• Insulation: Back Only (Opt'l), Back, Sides, Top (Opt'l)
• Piping Knockout: (Opt'l)
• 4" End Pockets: LH (Opt'l), RH (Opt'l), Both Ends (Opt'l)
• Perforated Front: Consult Factory, 16 Ga. (Opt'l), 14 Ga. (Opt'l)

Model Dimensions Table (Type RF-A/RFG-A)

Note: When adding end pockets, liner and front length increase.

Steam Ratings

BTU/H Ratings (215°F at 65°F EAT)

Type RF-A: Front Outlet, Nominal Liner Height

Type RFG-A: Front Outlet, Nominal Liner Height

Correction factors for BTU performance at different Average Water Temperatures, use correction factors from Table 3 of the Correction Factors page. For other applicable correction factors see the Correction Factors page. For assistance with ratings and selection, please use our online Specifier.

Correction Factors

Table 3: Convector Correction Factors

Based on Section 35.4 ASHRAE HVAC Systems and Equipment

Table 4: Correction Factors for Steam Pressures Other Than 1 PSI Gauge

*Apply factors shown above to the ratings shown on the 215°F ratings page. Note: Max Recommended operating pressure 150 PSIG, (365.9°F). For conversion from steam to hot water, use correction factors shown in Table 3.

Table 5: Correction Factors for Access Doors

Note: Derating factors do not apply to units with end pockets.

Table 6: Pressure Loss in Feet of Water

Charted figures showing pressure drop through Convectors with forced hot water. Used for determining pressure head requirement. Based on 64" length units, but applicable to shorter units, as most loss is due to headers.

Table 7: Gallons Per Minute of Hot Water Required

This section contains a graph illustrating GPM vs. MBH for different temperature drops (10°F, 20°F, 30°F, 40°F). The Y-axis represents GPM, and the X-axis represents MBH. Lines show the relationship for various temperature drops.

Table 8: Output-Flow Rate Corrections

Note: Table 8 shows MBH which result at specific water temperature drops and minimum water flow rates which are required to maintain turbulent flow within element tubes.

Diagrams and Details

General Unit Dimensions and Configuration

Diagram shows a side view of the convector unit with key dimensions labeled: D (Depth), L (Liner Length), H (Height), B (Width), J (Projection). It also indicates the placement of the Damper and notes that the end-to-end length is the liner length plus 1/2 inch. A 3/4" NPT typical connection is shown. Riser centers are noted as liner length less 2 1/2". A dual inlet header is depicted. The diagram also shows a vent plug and a 3-position hanger welded to the liner.

Note: When ordering convectors with end pockets, always refer to the standard unit length. The overall physical length will increase by 4" for each end pocket. The coil length will remain the standard size. Coil fins are 2-1/2" high by width shown above and are mechanically bonded to copper tube at 6 fins per inch.

Manufacturer Information

Company: STERLING COMMERCIAL HYDRONIC PRODUCTS

Address: 260 North Elm St., Westfield, MA 01085

Phone: (413) 564-5535

Website: www.sterlingheat.com