Roberts Gorden CTHN-80 Lower Clearance Shield, Venting, Model, inches, centimeters, Unapproved

CTHN-SERIES INSTALLATION, OPERATION AND SERVICE MANUAL

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 8: 2-FOOT DECO GRILLE, 1-FOOT DECO GRILLE AND PROTECTIVE GRILLE

A

C

B

D

Model

CTHN-40 CTHN-60 CTHN-80 CTHN-100 CTHN-125 CTHN-150 CTHN-175 CTHN-200

	(inches)
A	B	C	D
5	20	41	20
5	27	51	27
5	30	58	30
5	32	60	32
5	35	65	35
5	39	71	39
8	44	74	44
8	47	76	47

	(centimeters)
A	B	C	D
13	51	104	51
13	69	130	69
13	76	147	76
13	81	152	81
13	89	165	89
13	99	180	99
20	112	188	112
20	119	193	119

FIGURE 9: LOWER CLEARANCE SHIELD*

		(inches)				(centimeters)
Model	A	B	C	D	A	B	C	D

A		CTHN-40	5	25	22	25	13	64	56	64
		CTHN-60	5	30	27	30	13	76	69	76
	B	CTHN-80	5	37	37	37	13	94	94	94
		D	5	39	39	39	13	99	99	99
C		CTHN-100
		CTHN-125	5	41	41	41	13	104	104	104
		CTHN-150	5	43	50	43	13	109	127	109

CTHN-175	- UNAPPROVED -	- UNAPPROVED -
CTHN-200	- UNAPPROVED -	- UNAPPROVED -

*When installed in the first 10' (3 m).

FIGURE 10: VENTING

							(inches)			(centimeters)
					Model	A	E	F	A	E	F
					CTHN-40	14	18	18	36	46	46
	A	E
Unvented			Vent		CTHN-60	14	18	18	36	46	46
					CTHN-80	20	24	18	51	61	46
			Pipes
Radiant Tubes
					CTHN-100	20	24	18	51	61	46
					CTHN-125	20	24	18	51	61	46
Vented				F	CTHN-150	20	30	18	51	76	46
					CTHN-175	20	30	18	51	76	46
					CTHN-200	20	30	18	51	76	46

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