CONVECTOR Submittal Specification

FS-A / FSG-A Flat Top Cabinet

Wall/Floor Mounted

Product Configuration

Type: FS-A Open Inlet | FSG-A Louvered Inlet

Front and Liner Style: Front Outlet

Outlet Type: Stamped Louvers, Pencil Proof

Lengths: 20" through 64" in 4" Increments

Material (MAT'L) - 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)
18 Ga./20 Ga. SS (Optional)
18 Ga./18 Ga. SS (Optional)
16 Ga./20 Ga. SS (Optional)
16 Ga./18 Ga. SS (Optional)
16 Ga./16 Ga. SS (Optional)

Finish

Baked Powder Prime
Baked Powder Color (Optional)

Element

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

Header Connections

Single Header Both Ends (Standard)
Single Inlet 1 End / Dual Inlet 1 End (Optional)
Dual Inlet Both Ends (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)

Model Type FS-A / FSG-A Dimensions

MODEL	D	L	H	B	J
4xx-18	4-1/4	20,24,28, 32,36,40, 44,48,52, 56,60,64,	18	2-1/8	2
4xx-20			20
4xx-24		24
4xx-26		26
4xx-32		32
6xx-18	6-1/4	20,24,28, 32,36,40, 44,48,52, 56,60,64,	18	3-1/8	4
6xx-20			20
6xx-24		24
6xx-26		26
6xx-32		32
8xx-18	8-1/4	20,24,28, 32,36,40, 44,48,52, 56,60,64,	18	4-1/8	6
8xx-20			20
8xx-24		24
8xx-26		26
8xx-32		32

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

Installation Diagram Description

A diagram illustrates the mounting of the convector. It shows a wall and floor interface, with dimensions indicating clearances and overall size. A damper mechanism is shown, with an adjustable range indicated (± 1/2 inch). The diagram also labels key dimensions like 'D', 'L', 'H', 'B', and 'J' corresponding to the model table. It notes that the end-to-end length is the liner length less 1/2 inch, and riser centers are liner length less 2 1/2 inches. A 3/4" NPT connection is typical. The diagram also shows louvers and end pockets.

STEAM RATINGS IN BTU/H (215°F at 65°F EAT)

Type FS-A

DEPTH	LENGTH IN INCHES
DEPTH	18"	20"	24"	26"	32"
20"	2230	2495	2830	2930	3120
24"	2760	3145	3625	3720	3985
28"	3310	3815	4345	4465	4775
32"	3865	4490	5110	5255	5665
36"	4370	5160	5880	6025	6505
40"	4895	5810	6600	6790	7320
44"	5425	6480	7390	7560	8160
48"	5950	7105	8110	8350	8975
52"	6550	7800	8855	9070	9745
56"	7030	8450	9625	9865	10630
60"	7655	9120	10345	10610	11400
64"	8135	9790	11135	11400	12290

Type FSG-A

DEPTH	LENGTH IN INCHES
DEPTH	18"	20"	24"	26"	32"
20"	2163	2420	2773	2871	3089
24"	2677	3051	3553	3646	3945
28"	3211	3701	4258	4376	4727
32"	3749	4355	5008	5150	5608
36"	4239	5005	5762	5905	6440
40"	4748	5636	6468	6654	7247
44"	5262	6286	7242	7409	8078
48"	5772	6892	7948	8183	8885
52"	6354	7566	8678	8889	9648
56"	6819	8197	9433	9668	10524
60"	7425	8846	10138	10398	11286
64"	7891	9496	10912	11172	12167

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

AVERAGE WATER TEMPERATURE (°F)	ENTERING AIR TEMPERATURE (°F) (STD)
AVERAGE WATER TEMPERATURE (°F)	55°	60°	65°	70°	75°
100°	0.17	0.14	0.12	0.09	0.07
110°	0.23	0.20	0.17	0.14	0.12
120°	0.29	0.26	0.23	0.20	0.17
130°	0.35	0.32	0.29	0.26	0.23
140°	0.43	0.39	0.35	0.32	0.29
150°	0.50	0.46	0.43	0.39	0.35
160°	0.58	0.54	0.51	0.47	0.43
170°	0.67	0.63	0.58	0.54	0.51
180°	0.76	0.71	0.67	0.63	0.58
190°	0.85	0.81	0.76	0.71	0.67
200°	0.95	0.90	0.85	0.81	0.76
210°	1.05	1.00	0.95	0.90	0.85
215° (STD)	1.10	1.05	1.00	0.95	0.90
220°	1.15	1.10	1.05	1.00	0.95
230°	1.26	1.20	1.15	1.10	1.05
240°	1.37	1.32	1.26	1.21	1.15
250°	1.47	1.43	1.37	1.32	1.27

Table 4: CORRECTION FACTORS FOR STEAM PRESSURES OTHER THAN 1 PSI GAUGE*

PRESSURE PSI GAUGE	5	10	15	20	25	50
FACTOR	1.12	1.25	1.36	1.46	1.56	1.93

*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

Length	Free Standing, Non-Recessed Non-Standard Access Door Locations				Semi-Recessed or Fully Recessed Non-Standard Access Door Locations
Length	3 or 4	3 & 4	5 or 6	5 & 6	3 or 4	3 & 4	5 or 6	5 & 6
20"	0.940	0.880	0.820	0.650	0.975	0.950	0.925	0.850
24"	0.950	0.910	0.860	0.720	0.980	0.960	0.940	0.880
28"	0.960	0.920	0.890	0.770	0.982	0.968	0.948	0.902
32"	0.970	0.940	0.890	0.800	0.985	0.972	0.955	0.918
36"	0.970	0.940	0.920	0.830	0.988	0.975	0.962	0.925
40"	0.970	0.950	0.920	0.850	0.990	0.978	0.970	0.932
44"	0.980	0.950	0.930	0.860	0.990	0.980	0.970	0.940
48"	0.980	0.960	0.940	0.880	0.990	0.982	0.970	0.948
52"	0.980	0.960	0.950	0.890	0.992	0.985	0.978	0.955
56"	0.980	0.960	0.950	0.890	0.992	0.985	0.978	0.955
60"	0.980	0.970	0.950	0.900	0.992	0.985	0.978	0.955
64"	0.980	0.970	0.950	0.910	0.992	0.988	0.978	0.962

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

Table 6: PRESSURE LOSS IN FEET OF WATER

WATER FLOW IN G.P.M.	4 INCH MODELS	6 INCH MODELS	8 INCH MODELS
.25	0.044	--	--
.50	0.160	0.070	0.046
1	0.597	0.270	0.167
2	2.220	1.047	0.616
3	--	2.260	1.367
4	--	3.793	2.380
5	--	--	3.673

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.

CONVECTOR BTU CORRECTION FACTORS

Table 7: GALLONS PER MINUTE OF HOT WATER REQUIRED

A line graph titled 'GALLONS PER MINUTE OF HOT WATER REQUIRED' plots GPM (Gallons Per Minute) on the Y-axis against MBH (Thousands of BTU per Hour) on the X-axis. Several lines represent different temperature drops (10°F, 20°F, 30°F, 40°F), showing the relationship between water flow rate and heating capacity. For example, a 10°F drop line indicates that approximately 10 GPM corresponds to 200 MBH.

Table 8: OUTPUT-FLOW RATE CORRECTIONS

Convector Depth	Tubes per Element	Min. Flow Rate (0.25 Ft./Sec.)	MBH Based on T.D. & Min. Flow Rate
		GPM	10TD	20TD	30TD	40TD
4"	2	.15	0.750	1,500	2,250	3,000
6"	3	.225	1.125	2,250	3,375	4,500
8"	4	.30	1.500	3,000	4,500	6,000

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.

CONVECTOR COIL

Coil configurations:

4" - 2 TUBE ELEMENT 3 3/4"
6" - 3 TUBE ELEMENT 5 3/4"
8" - 4 TUBE ELEMENT 7 3/4"

Coil fins are 2-1/2" high by width shown above and are mechanically bonded to copper tube at 6 fins per inch.

A diagram shows the convector coil construction. It details the number of tubes and their configuration (e.g., 4" depth has a 2 TUBE ELEMENT 3 3/4" configuration). It indicates the relationship between the end-to-end length and the liner length (Liner Length Less 1/2"), and the riser center dimensions (Liner Length Less 2 1/2"). A 3/4" NPT connection is typical. The diagram also depicts 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.

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