FRONT VIEW; LEFT SIDE VIEW; TOP VIEW- Page 4

Series 24 Dimensions

(in inches)

SAFETY/RELIEF

VALVE

‘F’ O.D. COLLAR

(STD. REAR OUTLET)

3

‘C’

‘A’

4

‘D’

INSULATED

JACKET

COMBINATION

LABEL

RATING

LABEL

�

 HIGH 

PRESSURE

LIMIT CONTROL/MR

�

HIGH

PRESSURE

LIMIT CONTROL/MR

NWL

57

MM#67 LWCO

LOWEST

PERMISSIBLE

WATER LEVEL

PLATE

(STEAM ONLY)

FLOOR

FRONT VIEW

(STEAM)

LEFT SIDE VIEW

(STEAM)

FRONT VIEW

(WATER)

BURNER

MOUNTING

PLATE

‘H’

‘G’

6

(TYP)

1

REMOVABLE SIDE

PANELS

OVER-FIRE

PRESSURE SENSING;

NPT PLUGGED

REAR OBSERVATION

PORT COVER

REAR FLUE
OUTLET W/

DAMPER

TANKLESS HEATERS

(‘E’ MAXIMUM ALLOWABLE)

‘B

’

4” SUPPLY

(TYP)

TOP VIEW

BREECHING PRESSURE

SENSING;       

PLUGGED (REAR OUTLET)

3

/

8

-16

BREECHING PRESSURE

SENSING;       

PLUGGED (TOP OUTLET)

3

/

8

-16

1

8

13

1 2

3

1

8

6

1 2

16

STD.

1 8

16

1 8

1

8

41

1 2

9

1

4

47

3 8

4

1

4

4

1

4

23

1

2

32

1

8

3

1 2

16

5

8

3” RETURN

(4 PLACES)

FLAME

OBSERVATION

PORT

TEMPERATURE/

PRESSURE GUAGE

STEAM GUAGE

GUAGE

GLASS

SET

RATING LABEL

OPERATING

LIMIT

OPERATING

LIMIT

RETURN

TEMPERATURE

CONTROL

ASME DATA

LABEL

‘F’

O.D.

COLLAR

(OPTIONAL

TOP OUTLET)

ASME DATA

LABEL

COMBINATION LABEL

INSTALLER/

SERVICE 

LABEL

�

PROBE TYPE

LOW WATER

CUT-OFF

BREECHING PRESSURE

SENSING;       

PLUGGED (REAR OUTLET)

3

/

8

-16

  ITEMS 

DESCRIPTION

1

1-1/4” Copper Elbow

2

1-1/2” x 1-1/4” x 1-1/4” Copper Tee

3

2” x 1-1/2” x 1-1/4” Copper Tee

4

2” x 2” x 1-1/4” Copper Tee

5

1-1/4” Copper x MIP Adapter

Notes:

1.   It is important that tankless heater sections 

be correctly located in the boiler. Refer to 

installation manual.

2.   Pressure drop across each T-4 tankless  

heater = 5.25 PSI at 7.5 GPM flow rate.

3.  Locate heater control in heater identified as

IN

IN

OUT

OUT

OUT

(TYP)

12” MIN

THREE HEATER MANIFOLD

TWO HEATER MANIFOLD

FOUR HEATER MANIFOLD

FOR JACKET

REMOVAL

IN

1

1

1

1

1

1

2

2

2

2

2

2

3

3

3

3

4

4

5

NUMBER OF 24 TANKLESS

  BOILER 

  HEATERS INSTALLED

  MODEL 

1 

2 

3 

4

24-03

6.75 

— 

— 

—

24-04

7.5 

— 

— 

—

24-05

7.5 

— 

— 

—

24-06

7.5 

15 

— 

—

24-07 

7.5 

15 

— 

—

  24-08 

7.5 

15 

— 

—

24-09

7.5 

15 

22.5 

—

24-10

7.5 

15 

22.5 

—

24-11

7.5 

15 

22.5 

—

24-12

7.5 

15 

22.5 

30

Continuous draw heated from 40°F to 140°F 

with 200°F boiler water.

Tankless Heater  

Ratings in GPM

Multi-Heater Manifold 

MAXIMUM 

FLUTE 

BURNER                                 BECKETT

1

APPROX. 

NUMBER 

NUMBER 

NUMBER OF  OUTLET 

MOUNTING 

K.D. BLR. 

  BOILER 

OF 

OF STEAM 

HEATERS  DIAMETER 

PLATE WIDTH 

CF OIL 

CG GAS 

SHIPPING 

  MODEL  SECTIONS 

‘A’ 

‘B’ 

RISERS 

‘C’ 

‘D’ 

‘E’ 

‘F’ 

‘G’ 

‘H’ 

‘H’ 

WEIGHT LB.

  24-03 

3 

18-1/4 

12 

1 

– 

9-1/8 

1 

7 

8 

9-3/4 

20-7/8 

1363

  24-04 

4 

24-1/4 

18 

1 

– 

12-1/8 

1 

7 

8 

11-3/4 

21-5/8 

1675

  24-05 

5 

30-1/4 

24 

1 

– 

15-1/8 

1 

8 

8 

11-3/4 

21-5/8 

1987

  24-06 

6 

36-1/4 

30 

1 

– 

18-1/8 

2 

8 

4 

20-5/8 

21-5/8 

2273

  24-07 

7 

42-1/4 

36 

2 

– 

21-1/8 

2 

8 

4 

20-5/8 

28-5/8 

2589

  24-08 

8 

48-1/4 

42 

2 

– 

24-1/8 

2 

10 

4 

20-5/8 

28-5/8 

2901

  24-09 

9 

54-1/4 

48 

2 

– 

27-1/8 

3 

10 

4 

21-1/8 

29-1/8 

3282

  24-10 

10 

60-1/4 

54 

2 

– 

30-1/8 

3 

10 

4 

21-1/8 

29-1/8 

3614

24-11 

11 

66-1/4 

60 

2 

– 

33-1/8 

3 

12 

4 

22-5/8 

29-1/8 

3925

  24-12 

12 

72-1/4 

66 

3 

30 

36-1/8 

4 

12 

4 

22-5/8 

29-1/2 

4252

●

Not supplied as 
standard equipment