Roberts Gorden CTU 22 TO 115 service manual Burner Compartment, Burner Injectors

COMBAT® CTU UNIT HEATERS INSTALLATION OPERATION AND SERVICE MANUAL

16.2 Burner Compartment

The burner compartment is a sealed compartment. Following any work, re-seal the compartment with the gas pipe rubber seal fully in place and all screws fitted and tight.

Burner

compartment

cover

Flame probe

Viewing port

for flame probe

Remove flexible

air duct from spigot

Ignition electrode

Viewing port

for ignition electrode

Remove

access plate Rubber Seal

Remove screws and pull off burner cover

16.2.1 Burner Injectors

Ensure gas tight fitting of injectors.

Ensure correct alignment with burners.

Ensure all pipe joints are gas tight.	Manifold	Burners
	Remove manifold
	screws and pull	Injectors
	out manifold

Manifold

Unscrew

Injectors

Burner venturi

Burner Screws

Marking

MODEL	CTU-22	CTU-30	CTU-35	CTU-40	CTU-50	CTU-60	CTU-75	CTU-90	CTU-100	CTU-115
Injector Quantity	5	5	6	7	9	11	12	14	15	17
Natural Gas (G20) and (G25)
Injector size mm Ø	2.08	2.25	2.25	2.25	2.25	2.25	2.71	2.71	2.71	2.71
in Ø	0.0819	0.0886	0.0886	0.0886	0.0886	0.0886	0.1067	0.1067	0.1067	0.1067
Marking	45	225	225	225	225	225	36	36	36	36
RG P/N	91930045	91930225	91930225	91930225	91930225	91930225	91930036	91930036	91930036	91930036
LPG Gas Propane (G31) and LPG Gas Butane (G30)
Injector size mm Ø	1.25	1.40	1.40	1.40	1.40	1.35	1.51	1.51	1.51	1.51
in Ø	0.0492	0.0551	0.0551	0.0551	0.0551	0.0531	0.0594	0.0594	0.0594	0.0594
Marking	125	54	54	54	54	135	53	53	53	53
RG P/N	91930125	91930054	91930054	91930054	91930054	91930135	91930053	91930053	91930053	91930053

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