Roberts Gorden CTH2-80 U-Tube,Standard Reflector, inches A B C D UNAPPROVED, U-TUBE,45, Model

SECTION 3: CLEARANCES TO COMBUSTIBLES

NOTE: 1. All dimensions are from the surfaces of all tubes, couplings and elbows.

2.Clearances B, C and D can be reduced by 50% after 25' (7.5 m) of tubing downstream from where the burner and burner tube connect.

FIGURE 7: U-TUBE, STANDARD REFLECTOR

A

B C

D

Model

CTH2-40

CTH2-60 CTH2-80 CTH2-100 CTH2-125 CTH2-150 CTH2-175

(inches)

A B C D

- UNAPPROVED -

6	35	63	30
6	38	69	37
6	40	76	39
6	46	79	43
6	50	84	47
8	54	87	51

(centimeters)

A B C D

- UNAPPROVED -

16	89	161	77
16	97	176	94
16	102	194	100
16	117	201	110
16	127	214	120
21	138	221	130

FIGURE 8: U-TUBE, 45°

A

B

D

C

Model

CTH2-40

CTH2-60

CTH2-80 CTH2-100 CTH2-125

CTH2-150 CTH2-175

(inches)

A B C D

- UNAPPROVED -

8	8	60	42
8	8	66	46
8	8	74	52
8	8	78	61
8	8	84	66
8	8	85	70

	(centimeters)
A	B	C	D
	- UNAPPROVED -
21	21	153	107
21	21	168	117
21	21	188	133
21	21	199	155
21	21	214	168
21	21	216	178

FIGURE 9: U-TUBE, OPPOSITE 45° REFLECTOR

A

B C

D

Model

CTH2-40

CTH2-60 CTH2-80

CTH2-100 CTH2-125 CTH2-150 CTH2-175

(inches)

A B C D

- UNAPPROVED -

8	54	60	22
8	60	66	22
10	64	74	22
10	70	78	22
12	74	84	22
12	76	85	22

	(centimeters)
A	B	C	D
	- UNAPPROVED -
21	138	153	56
21	153	168	56
26	163	188	56
26	178	199	56
31	188	214	56
31	194	216	56

7