Roberts Gorden CTHN-80, CTHN-200, CTHN-100 Multiburner Design Requirements, Burners Per Pump

CTHN-SERIES INSTALLATION, OPERATION AND SERVICE MANUAL

Table 10: Multiburner Design Requirements

Burner Model:	CTHN-40	CTHN-60	CTHN-80 CTHN-100 CTHN-125 CTHN-150				CTHN-175	CTHN-200
Radiant Tube Length	20' (6 m)	30' (9 m)	30' (9 m)	40' (12 m)	50' (15 m)	50' (15 m)	60' (18 m)	60' (18 m)
Minimum Manifold Tube Length per Burner	3' (1 m)	3' (1 m)	3' (1 m)	6' (2 m)	6' (2 m)	10' (3 m)	10' (3 m)	10' (3 m)
Maximum Manifold Tube Length per	30' (9 m)	35' (10.5 m)	40' (12 m)	45' (13.5 m)	50' (15 m)	55' (16.5 m)	60' (18 m)	60' (18 m)
Burner
Minimum Distance from Burner to Elbow	10' (3 m)	10' (3 m)	10' (3 m)	15' (4.5 m)	15' (4.5 m)	20' (6 m)	20' (6 m)	20' (6 m)
or U-tube
Elbows Allowed per Burner*	2	2	2	2	2	2	2	2
* U-tube = 2 elbows

9.3 Burners Per Pump

1.The maximum number of burners per pump is shown in Table 11.

2.When combining different burner inputs in a system, the number of burners per pump (0' - 2,000' altitude) is given by the sum of their inputs:

a.EP-100 up to 500,000 Btu/h max, but not more than 4 burners.

b. EP-200 up to 750,000 Btu/h max, but not more than 6 burners.

c. EP-300 up to 1,600,000 Btu/h max, number of burners is limited to the maximum number of burners listed in Table 11 for the largest input model used.

Table 11: Number of Burners Allowed Per Pump

Pump Model	Altitude	CTHN-40	CTHN-60 CTHN-80		CTHN-100	CTHN-125 CTHN-150 CTHN-175 CTHN-200
	0' - 2,000'	4	4	4	4	4	3	2	2
	2,001' - 3,000'	4	4	4	4	3	3	2	2
	3,001' - 4,000'	4	4	4	4	3	2	2	2
EP-100	4,001' - 5,000'	4	4	4	4	3	2	2	2
	5,001' - 6,000'	4	4	4	4	3	2	2	2
	6,001' - 7,000'	4	4	4	3	3	2	2	2
	7,001' - 8,000'	4	4	4	3	3	2	2	1
	8,001' - 9,000'	4	4	4	3	2	2	2	1
	0' - 2,000'	6	6	6	6	6	5	4	4
	2,001' - 3,000'	6	6	6	6	6	5	4	3
	3,001' - 4,000'	6	6	6	6	5	4	4	3
EP-200 Series	4,001' - 5,000'	6	6	6	6	5	4	4	3
	5,001' - 6,000'	6	6	6	6	5	4	3	3
	6,001' - 7,000'	6	6	6	6	5	4	3	3
	7,001' - 8,000'	6	6	6	6	5	4	3	3
	8,001' - 9,000'	6	6	6	6	5	4	3	3
	0' - 2,000'	16	16	14	12	12	10	8	8
	2,001' - 3,000'	16	16	14	12	12	9	8	7
	3,001' - 4,000'	16	16	14	12	11	9	8	7
EP-300 Series	4,001' - 5,000'	16	16	14	12	10	9	7	6
	5,001' - 6,000'	16	16	14	12	10	8	7	6
	6,001' - 7,000'	16	16	14	12	10	8	7	6
	7,001' - 8,000'	16	16	14	12	10	8	6	6
	8,001' - 9,000'	16	16	14	12	10	8	6	6

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