U S Boiler Company 4X2522CG Free-Standing Cast Iron Radiators User Guide
- June 13, 2024
- U S Boiler Company
Table of Contents
U S Boiler Company 4X2522CG Free-Standing Cast Iron Radiators
Product Information
The Free-Standing Cast Iron Radiators are available in three models: Slenderized, Radiant, and Classic. These radiators provide efficient heating for homes. They come in different sizes and sections, with various heights and BTU ratings.
Slenderized Model
- Type: Number of tubes x height in inches (includes plugs and/or bushings for all tappings)
- Assembly Type: C = Complete, I = Intermediate, R = Return End with connection, A = Intermediate Sub Assembly
- End Section Legs: G = With Legs, L = No Legs
Radiant Model
- Size: Number of sections
Classic Model
- Length: 2-1/4 inches per section
The radiators have a maximum allowable working pressure of 30 PSI for water and 15 PSI for steam. They should be installed with a 1-inch clearance from the wall. The water content varies based on the number of sections.
Product Usage Instructions
- Determine the appropriate model and size of radiator based on your heating requirements.
- For the Slenderized model, choose the type and assembly type that suits your installation needs.
- If necessary, select the Slenderized model with or without end section legs.
- Use the provided ratings per section to calculate the required BTU output for your space.
- Install the radiator with a 1-inch clearance from the wall.
- Follow the provided dimensions and tappings to connect the radiator to the steam or hot water supply and return lines.
- Optional accessories and fittings, such as adjustable brackets and pedestals, can be used for wall mounting or additional support.
- Refer to the specific model and section length to determine the overall length of the radiator.
- Follow the provided instructions for mounting the radiator on adjustable brackets, if applicable.
- Ensure proper maintenance and operation of the radiator according to the user manual for optimal performance.
Free-Standing
Cast Iron Radiators
Installer Highlights
- Cast iron reliability and durability
- Water or steam
- Slenderized & Radiant models are pre-primed (water-based latex) for immediate top-coat paint finishing (premium oil or solvent -based)
- Classic models are pre-painted
- Residential or commercial
Homeowner Benefits
- Cast iron offers both convective and radiant heat, providing even heating comfort throughout the room
- Virtually silent operation, does not have the expansion noises associated with “light duty” radiator systems
- Rugged cast iron construction
Slenderized
Size (Sections)| Length 1-3/4” per Sections (inches)|
Square Feet – **EDR*
---|---|---
4- Tube| 6- Tube
19” High| 25” High| 25” High**
4
6
8
10
12
14
16
18
20
22
24
26
28
30
32
34
36
38
40
42
44
46
48
| 7”
10-1/2”
14”
17-1/2”
21”
24-1/2”
28”
31-1/2”
35”
38-1/2”
42”
45-1/2”
49”
52-1/2”
56”
59-1/2”
63”
66-1/2”
70”
73-1/2”
77”
80-1/2”
84”
| 6.4
9.6
12.8
16.0
19.2
22.4
25.6
28.8
32.0
35.2
38.4
41.6
44.8
48.0
51.2
54.4
57.6
60.8
64.0
67.2
70.4
73.6
76.8
| 8
12
16
20
24
28
32
36
40
44
48
52
56
60
64
68
72
76
80
84
88
92
96
| 12
18
24
30
36
42
48
54
60
66
72
78
84
90
96
102
108
114
120
126
132
138
144
- Heating surface based upon the standard heat emission of 240 BTU per square foot per hour.
Add 1/2” for each bushing.
Center leg section furnished on 30 section and better.
Furnished in even number section up to 48 sections.
Maximum allowable working pressure – 30 PSI, water; 15 PSI steam. Consult factory for higher pressure. Allow 1” clearance from wall. Water content – 4×19-0.08 Gal./section; 4×25-:0.12 Gal./section; 6×26-:0.17 Gal./section
RATINGS PER SECTION
Steam| 4 x 19| 4 x 25| 6 x 25
384 BTU| 480 BTU| 720 BTU
Water Temp at °F| 4 x 19| 4 x 25| 6 x 25
220| 400 BTU| 500 BTU| 750 BTU
215| 384 BTU| 480 BTU| 720 BTU
210| 368 BTU| 460 BTU| 690 BTU
200| 336 BTU| 420 BTU| 630 BTU
190| 304 BTU| 380 BTU| 570 BTU
180| 272 BTU| 340 BTU| 510 BTU
170| 240 BTU| 300 BTU| 450 BTU
160| 208 BTU| 260 BTU| 390 BTU
150| 176 BTU| 220 BTU| 330 BTU
FEDERAL – OLD STYLE COLUMN
RATING – Square Feet Per Section
Height| 1 Col. 2-1/2”
ctr.| 2 Col. 2-1/2”
ctr.| 3 Col. 2-1/2”
ctr.| 4 Col.
3”
ctr.| 5 Col.
3”
ctr.
14”
17”
18”
20”
22”
23”
26”
32”
38”
44”
45”
| —
—
— 1.50
— 1.67
2.00
2.50
3.00
—
—
| —
—
— 2.00
— 2.33
2.67
3.33
4.00
— 5.00
| —
— 2.25
— 3.00
— 3.75
4.50
5.00
— 6.00
| —
— 3.00
— 4.00
— 5.00
6.50
8.00
10.00
—
| 4.00
4.00
5.00
5.00
6.00
—
—
—
—
—
—
SLENDERIZED MODEL NUMBER DESIGNATION (All designations listed, sample model number info in bold)
Sample Model No.| **Type*| Sections| Assembly
Type| End Section Legs
4X2522CG| 4X25
6X25
4X19| 22
(4-48)| C = Complete
I = Intermediate
R = Return End w/conn. A = Inter Sub Assy.| G = With Legs
** L = No Legs
DIMENSIONS
Type| H| I| J| K| L| M| N| O
6X25| 23-13/16”| 6-15/16”| 1-1/16”| 1”| 1/8”| 21-7/16”| 1-1/4”| 2-1/2”
4X25| 23-13/16”| 4-7/16”| 1-1/16”| 1”| 1/8”| 21-7/16”| 1-1/4”| 2-1/2”
4X19| 17-13/16”| 4-7/16”| 1-1/16”| 1”| 1/8”| 15-7/16”| 1-1/4”| 2-1/2”
| | | | NPT| NPT| | NPT|
- Plug + Alternate
TAPPINGS
| A| B| C| D| E
1 Pipe Steam| | supply| +vent| vent|
2 Pipe Steam| suppiy| +supply| | | return
Hot Water| | supply| vent| | return
Special Accessories and Fittings
- 8084301 : Adjustable Brackets (2 per radiator, illustrated below)
- 8074301 : Pedestals, 2”
Common Accessories and Fittings
- 105510-01 Slip Nipple
- 806603512 3/4” Plug
- 806603536 1” Plug
- 806603537 1-1/4” Plug
- 806600501 1” x 3/4” Bushing
- 806600504 1-1/4” x 3/4” Bushing
- 806600505 1-1/4” x 1/2” Bushing
Radiant
Size – Number of Sections| Length 2-1/4” per Section
(inches)| Free Standing *EDR, Square Feet per Section 2.25**
---|---|---
4
6
8
10
12
14
16
18
20
22
24
26
28
30
32
34
36
38
40
42
44
| 9”
13-1/2”
18”
22-1/2”
27”
31-1/2”
36”
40-1/2”
45”
49-1/2”
54”
58-1/2”
63”
67-1/2”
72”
76-1/2”
81”
85-1/2”
90”
94-1/2”
99”
| 9.0
13.5
18.0
22.5
27.0
31.5
36.0
40.5
45.0
49.5
54.0
58.5
63.0
67.5
72.0
76.5
81.0
85.5
90.0
94.5
99.0
*Increase radiator size 10% when recessed.
Recess guideline: 1/2”+ longer, 1/2”+ higher than radiator
Heating surface based upon the standard heat emission of 240 BTU per square
foot per hour.
Furnished in even number of sections up to 44 sections.
Maximum allowable working pressure – 30 PSI, water; 15 PSI, steam.
Water content – 0.15 Gal./section
RATINGS PER SECTION
Steam| 540 BTUH
Water Temp at °F
220| 562 BTU
215| 540 BTU
210| 517 BTU
200| 472 BTU
190| 427 BTU
180| 382 BTU
170| 337 BTU
160| 292 BTU
150| 247 BTU
RADIANT MODEL NUMBER DESIGNATION (All designations
listed, sample model number info in bold)
Sample Model No.| Type| Sections| Grille Type|
Section Type
20X544GC|
20X5
| 44 4-44 (even numbers)| G = W/Grille others discontinued| C = Complete others discontinued
Includes plugs and/or bushings for all tappings
DIMENSIONS
A| B| C| D| E| F| **G***
5”| 20”| 2-3/4”| 4-1/2”| 1-7/8”| 1-1/4”| 1/8”
*Vent tapping sizes; high vents for water,
mid-height vents for one pipe steam
Common Accessories and Fittings
- 105510-01 Slip Nipple
- 806603512 3/4” Plug
- 806603536 1” Plug
- 806603537 1-1/4” Plug
- 806600501 1” x 3/4” Bushing
- 806600504 1-1/4” x 3/4” Bushing
- 806600505 1-1/4” x 1/2” Bushing
Special Accessories and Fittings
- 70742* Snap-on Grille (per section)
- *04 to 30 add two end digits for size
- 8084201 Pins for Grille
- 6084201 Clips for Grille
- Count of pins/clips required:
- 4 -18 sections: 2 pins/2 clips
- 20 -30 sections: 2 pins/3 clips
Classic
Pre-painted with threaded nipple connections
Features “British” thread tappings
Brass valves are optional, see chart below for ordering information
Item Number
|
Section Type
|
Number of Sections
| Steam| Water|
A Length (in.)
|
Shipping Weight (lbs.)
---|---|---|---|---|---|---
Sq. Ft. **EDR*| Ratings BTU/hr.| Ratings BTU/hr.
CR330CFS| Complete| 3| 11| 2550| 1597| 9.1| 93
CR530CFS| Complete| 5| 18| 4250| 2662| 15.2| 151
CR730CFS| Complete| 7| 25| 5950| 3727| 21.3| 208
CR930CFS| Complete| 9| 32| 7650| 4792| 27.4| 265
CR530AFS| 5-Intermediate| 5| 18| 4250| 2662| 15.2| 151
107929-01| End section w/ vent| 1| 4| 850| 532| 3.0| 31
*Equivalence of direct radiation of heating surface based upon the standard heat emission of 240 BTU per square foot per hour.
** 5-Intermediate is used to expand radiators to longer sizes. See
disassembly/assembly instructions.
Stock sizes available for immediate shipment. Assemble 5 section intermediate
with 3, 5, 7 or 9 section stock size to make a custom size. End section with
vent is also used as intermediate leg support for radiators with more than 16
sections.
Water volume per section (gallons): 0.51
Normal operating pressure – water (psi): 116
Max pressure – water (psi): 145
Max pressure – steam (psi): 29
MODEL NUMBER DESIGNATION (All designations listed, sample model number info in bold)
Sample Number| Size| Height Designator| Build
Type
CR330CFS| CR3
Sections (3-9)| 30| CFS –Complete AFS–Intermediate
Valves & Accessories
-
8054005 Brass Isolation Valve*
-
8054006 Brass Balancing Valve*
-
104531-01 3/4” Bushing Kit (left)
-
104527-01 3/4” Bushing Kit (right)
-
104532-01 1” Bushing Kit (left)
-
104528-01 1” Bushing Kit (right)
-
107643-01 Nipple Kit
-
104530-01 1-1/4” Plug Kit (left)
-
104526-01 1-1/4” Plug Kit (right)
-
107564-01 Assembly Tool
-
Brass valves are functional and decorative
For additional reference, see the “Classic Radiator Calculator” tool,
available online at
www.usboiler.net/classicorderingguide
or refer to document: Assembly/Disassembly Instructions (107555-02)