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CTU UNIT HEATERS INSTALLATION OPERATION AND SERVICE MANUAL
36
16.2 Burner Compartment
Remove flexible
air duct from spigot
Remove
access plate
Remove screws and
pull off burner cover
Viewing port
for flame probe
Viewing port
for ignition electrode
Flame probe
Burner
compartment
cover
Rubber Seal
Ignition electrode
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.
16.2.1
Remove manifold
screws and pull
out manifold
Manifold
Burners
Injectors
Burner
Screws
Burner
venturi
Unscrew
Injectors
Manifold
Marking
Ensure gas tight fitting of injectors.
Ensure correct alignment with burners.
Ensure all pipe joints are gas tight.
Burner Injectors
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. 2 5 1. 4 0 1. 40 1. 4 0 1. 4 0 1. 35 1.5 1 1. 5 1 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